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  • Polymer and Materials Science  (14,995)
  • Humans  (2,776)
  • Geophysics
  • 2020-2024  (26)
  • 1995-1999  (18,997)
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  • 1
    Publication Date: 2024-04-26
    Description: Abstract
    Description: A network of 210 continuously running, digital seismic stations equipped with short-period sensors (200 stations) and broadband sensors (10 stations) was deployed in an area of ~8 x ~6 km in the Irish Midlands (north of Collinstown) for a time period of ~6 weeks. The network was part of the EU project VECTOR (https://vectorproject.eu) aiming to investigate – among others – possible solutions for least invasive forms of exploration for mineral resources. In this context the collected data was mainly used to derive a 3D model of the subsurface (seismic shear wave velocity) using ambient noise tomography (down to ~1.5km depth). We thank all field crews for their excellent work rendered to the project. Waveform data is available from the GEOFON data centre, under network code 7W, and is embargoed until Feb 2025.
    Keywords: EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS ; Seismometers ; Geophone[g] ; Velocity ; MiniSEED ; Passive seismic ; GIPP ; MESI ; Raw[g] ; Local network ; Vertical component[g] ; Three-component[g] ; Land[g] ; Geophysics ; Natural
    Type: Dataset , Seismic Network
    Format: ~300G
    Format: .mseed
    Format: XML
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  • 2
    Publication Date: 2024-06-14
    Description: Abstract
    Description: The dataset contains the seismic weight drop data acquired in Private Reserve Santa Gracia, Chile. The data acquisition was conducted as a part of the EarthShape project in the subproject of Geophysical Imaging of the Deep EarthShape (GIDES). The seismic line was setup to cut across an existing borehole location with core and geophysical logging data available (Krone et al., 2021; Weckmann et al., 2020). The data was acquired to image the deep weathering zone identified by the borehole data across the seismic profile. Included in the datasets are the raw data of the CUBE data logger, SEG-Y data of the recorded shots, and the shot and receiver geometry data. A vital aspect of comprehending the interplay between geological and biological processes lies in the imaging of the critical zone, located deep beneath the surface, where the transition from unaltered bedrock to fragmented regolith occurs. It had been hypothesized that the depth of such weathering zone is dependent on the climate condition of the area. A more humid climate with higher precipitation will result in a deeper weathering front. As a part of the EarthShape project (SPP-1803 ‘EarthShape: Earth Surface Shaping by Biota’), specifically the Geophysical Imaging of the Deep EarthShape (GIDES - Grant No. KR 2073/5-1), we aim to image the weathering zone using the geophysical approach. Using the seismic method, we can differentiate different weathered layers based on the seismic velocity while also providing a 2D subsurface image of the critical zone. We conducted a seismic weight drop experiment in the Private Reserve Santa Gracia, Chile, to observe the depth of the weathering zone in a semi-arid climate and compare the resulting model with existing borehole data (Krone et al., 2021; Weckmann et al., 2020). The acquired data can then be used for multiple seismic imaging techniques, including body wave tomography and multichannel analysis of surface waves.
    Description: Other
    Description: The DFG Priority Program 1803 "EarthShape - Earth Surface Shaping by Biota" (2016-2022; https://www.earthshape.net/) explored between scientific disciplines and includes geoscientists and biologists to study from different viewpoints the complex question how microorganisms, animals, and plants influence the shape and development of the Earth’s surface over time scales from the present-day to the young geologic past. All study sites are located in the north-to-south trending Coastal Cordillera mountains of Chile, South America. These sites span from the Atacama Desert in the north to the Araucaria forests approximately 1300 km to the south. The site selection contains a large ecological and climate gradient ranging from very dry to humid climate conditions.
    Keywords: Geophysics ; seismic ; weight drop ; weathering zone ; critical zone ; bedrock ; granite ; passive seismic ; 3C sensor ; EarthShape ; Chile ; Coastal Cordillera ; Private Reserve Santa Gracia ; CONTROLLED_SOURCE_SEISMOLOGY 〉 REFRACTION ; CONTROLLED_SOURCE_SEISMOLOGY 〉 WEIGHT-DROP_SOURCE ; CONTROLLED_SOURCE_SEISMOLOGY 〉 NEAR_SURFACE ; PASSIVE_SEISMIC 〉 STATIONS ; SENSOR 〉 GEOPHONE ; SENSOR 〉 3-C ; LAND ; SEG-Y_DATA_FORMAT ; MINISEED_DATA_FORMAT ; CONTROLLED_SOURCE_SEISMOLOGY 〉 RAW_DATA ; CONTROLLED_SOURCE_SEISMOLOGY 〉 VERTICALLY_STACKED_DATA ; EARTH SCIENCE 〉 SOLID EARTH ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 SEISMIC PROFILE
    Type: Dataset , Dataset
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  • 3
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    Archaeopress Publishing Ltd
    Publication Date: 2024-04-04
    Description: Non-Intrusive Methodologies for Large Area Urban Research brings together contributions from a conference held in 2021 in association with the ERC-funded ‘Rome Transformed’ research project. The papers address a major challenge in archaeology. Non-intrusive research in pursuit of a deeper understanding of urban areas can be both richly informative and cost-effective. Multiple successes in the field have led to an impressive array of innovative methodologies, methodologies that are frequently combined for still greater insight and impact. Geophysical surveys, the use of UAVs, the study of exposed historic structures and the exhaustive examination of archival records can all play a vital role, and the development of these data capture methodologies is of the utmost importance for the future of research. As well as advances in data capture methodologies, however, the papers also present case studies in the management of the big data generated and in the integration of different methodologies. A further strength of this collection lies in the range of site types considered. While many projects have historically pursued non-intrusive research in areas relatively clear of modern buildings, a growing number of research initiatives, such as ‘Rome Transformed’ are seeking to advance them in areas which remain densely occupied. Accordingly the material presented here will also be of interest to non-archaeologists working in such diverse fields as civil engineering, urban planning and physical geography.
    Keywords: Social Science ; Archaeology ; Science ; Physics ; Geophysics ; Computers ; Data Science ; Data Analytics ; thema EDItEUR::N History and Archaeology::NK Archaeology ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics ; thema EDItEUR::U Computing and Information Technology::UN Databases::UNF Data mining
    Language: English
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  • 4
    Publication Date: 2023-06-21
    Description: Abstract
    Description: This data publication contains part of a seismic survey collected across the Ivrea Zone, Italy, in October 2020. Within the research project SEIZE (SEismic Imaging of the Ivrea ZonE), this high-resolution seismic campaign investigates the upper 5 km of the subsurface under and around the commune of Balmuccia (Val Sesia, Piemont region). The aim is to provide the best in situ geophysical image and physical properties of the subsurface as well as to calibrate future observations made during the planned ICDP drilling (https://www.icdp-online.org/projects/by-continent/europe/dive-italy, http://www.dive2ivrea.org/). Seismic Data, including raw, mini-seed and SEG-Y files, of a part of a controlled-source 3D survey in Northern Italy, Ivrea Zone, based on 432 Vibroseis sources recorded by a fixed spread of 110 receivers.
    Keywords: Geophysics ; controlled-source seismic survey ; Alps ; Vibroseis ; CONTROLLED_SOURCE_SEISMOLOGY 〉 REFLECTION ; CONTROLLED_SOURCE_SEISMOLOGY 〉 REFRACTION ; CONTROLLED_SOURCE_SEISMOLOGY 〉 WIDE-ANGLE_REFLECTION_REFRACTION ; CONTROLLED_SOURCE_SEISMOLOGY 〉 VIBRO_SOURCE ; CONTROLLED_SOURCE_SEISMOLOGY 〉 LOCAL_SCALE ; CONTROLLED_SOURCE_SEISMOLOGY 〉 RESERVOIR_SCALE ; CONTROLLED_SOURCE_SEISMOLOGY 〉 NEAR_SURFACE ; SENSOR 〉 GEOPHONE ; SENSOR 〉 VERTICAL_COMPONENT ; SENSOR 〉 3-C ; SEG-Y_DATA_FORMAT ; SEISMIC_WAVEFORM_DATA ; CONTROLLED_SOURCE_SEISMOLOGY 〉 RAW_DATA ; CONTROLLED_SOURCE_SEISMOLOGY 〉 CORRELATED_DATA ; CONTROLLED_SOURCE_SEISMOLOGY 〉 VERTICALLY_STACKED_DATA ; EARTH SCIENCE 〉 SOLID EARTH ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 SEISMIC PROFILE
    Type: Dataset , Dataset
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  • 5
    Publication Date: 2023-08-16
    Description: SeriesInformation
    Description: This dataset contains transient data from a transient electromagnet field survey to the Aurus clay pan in the Sperrgebiet in the southern Namib Desert, Namibia. Using this data resistivity models of the subsurface can be calculated and the geometry and sedimentary thickness of the clay pan can be imaged. Measurements were carried out along two profiles using the TEM-FAST 48. The coincident loop setup was used with a loop size of (50 x 50) m^2. The transient data is provided in ASCII-format. All coordinates can be found in the kmz-file. Additionally, two figures are provided that show 1D inversion results of each profile.
    Keywords: Geoscientific Information ; Transient Electromagnetic method (TEM) ; Geophysics
    Type: Dataset , Dataset
    Format: ASCII
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  • 6
    Publication Date: 2023-09-01
    Description: Abstract
    Description: We present a new, consistently processed seismicity catalogue for the Eastern and Southern Alps, based on the temporary dense Swath-D monitoring network. The final catalogue includes 6,053 earthquakes for the time period 2017-2019 and has a magnitude of completeness of −1.0ML. The smallest detected and located events have a magnitude of −1.7ML. Aimed at the low to moderate seismicity in the study region, we generated a multi-level, mostly automatic workflow which combines a priori information from local catalogues and waveform-based event detection, subsequent efficient GPU-based event search by template matching, P & S arrival time pick refinement and location in a regional 3-D velocity model. The resulting seismicity distribution generally confirms the previously identified main seismically active domains, but provides increased resolution of the fault activity at depth. In particular, the high number of small events additionally detected by the template search contributes to a more dense catalogue, providing an important basis for future geological and tectonic studies in this complex part of the Alpine orogen.
    Description: TableOfContents
    Description: Seismicity catalogue Python codes & metadata Seismicity cross-sections
    Keywords: Seismology ; Seismic Waveform Analysis ; Eastern Alps ; Earthquake ; Geophysics ; Template matching ; 4DMB ; 4D Mountain Building ; EARTH SCIENCE ; EARTH SCIENCE 〉 SOLID EARTH ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 EARTHQUAKE MAGNITUDE/INTENSITY ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 EARTHQUAKE OCCURRENCES ; geophysics ; seismology ; surface processes ; tectonics
    Type: Dataset , Dataset
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  • 7
    Publication Date: 2023-01-10
    Description: The Cartesian-based least squares reverse time migration (LSRTM) aims to obtain a relatively high-resolution amplitude preserving imaging by calculating and solving the Hessian matrix. In addition, conjugate gradient algorithm is proved to be an efficient iterative method, which makes the traditional LSRTM feasible in practical data processing applications. Each iteration process of LSRTM includes two main parts; The first part is the forward simulation of wavefield, and the second part is the back propagation of wavefield. However, the calculation of these two parts takes a lot of time, and oversampling effects will occur in the calculation process. The thesis develops a smooth understanding of the LSRTM scheme in pseudodepth domain and gives information about this type of wavefield extrapolation method to achieve amplitude-preserved image with low computational costs in terms of memory and time. The underground media faced by seismic exploration usually include low velocity bodies, high steep structures and pore fracture units. When simulating the seismic wavefield in these media, in order to ensure the simulation accuracy and computational stability by finite difference methods, the grid spacing needs to be very small, which leads to the oversampling problem of the traditional finite difference forward simulation method in Cartesian coordinate system. In order to overcome this problem, the pseudo depth domain algorithm is applied to the least-squares reverse time migration to improve its computational efficiency. The problem of stabilizing this Pseudodepth wavefield arises from the introduction of the mapping function and velocity and also the vertical axis operator that converts the finite difference solution partially from time into frequency domains. Stability and convergence analysis suggests that the spatial derivatives of Riemannian axis should be approximated by a mixed Fourier pseudo-spectral and ordinary finite-difference schemes methods using a special Gaussian-like impulse function to generate the vector-matrix of the complex source term within the finite-difference operator, in addition to the mapping velocity, which is a differential form of the initial input velocity model, manifestly controls the CFL conditions of the associated Riemannian-finite difference operator. Numerical and synthetic examples indicated that this approach is more stable and efficient in extrapolating a smooth Riemannian wavefield while maintaining Claerbout’s principle for locating subsurface reflectors also choosing an appropriate sampling rate for the new vertical axis is related inversely by the maximum frequency of the impulse wavelet and directly with minimum velocity value in the given model. The LSRTM wavefield extrapolation usually uses the two-dimensional constant density acoustic wave equation, by considering the change of velocity field distribution, and converts it to the corresponding pseudodepth domain, so as to solve the oversampling problem in the true depth domain. For each point in the Cartesian coordinate system, there is a corresponding point in the pseudo depth domain. Therefore, we can interpolate and remodel the reconstructed finite difference modelled wavefield in the new coordinate system through the Cartesian-to-pseudodepth mapping function. Regardless of the applied finite difference algorithm and boundary conditions, wavefield extrapolation in pseudodepth domain can ensure high accuracy and efficiency. Through the test of synthetic and actual data, compared with the traditional LSRTM results, pseudodepth domain LSRTM shows great potentiality in amplitude preserving imaging. On the other hand, pseudodepth domain LSRTM has great advantages in computational efficiency and ensures computational accuracy.
    Description: Masters
    Description: 基于笛卡尔的最小二乘逆时偏移(LSRTM)旨在通过计算和求解Hessian矩阵获得相对高分辨率和保幅的成像。此外,共轭梯度算法被证明是一种有效的迭代方法,这使得传统的LSRTM在实际数据处理应用中是可行的。LSRTM的每个迭代过程包括两个主要部分;第一部分是波场的正演模拟,第二部分是波场的反向传播。然而,这两部分的计算需要花费大量时间,并且在计算过程中会出现过采样效应。本论文对伪深度域LSRTM方法进行了研究,给出了该方法波场外推的信息,获取了保幅的图像,并且该方法有较低的内存和时间成本。 地震勘探面临的地下介质通常包括低速体、高陡构造和孔隙裂隙单元。在模拟这些介质中的地震波场时,为了保证有限差分法的模拟精度和计算稳定性,需要非常小的网格间距,这导致了传统的笛卡尔坐标系有限差分正演模拟方法的过采样问题。为了克服这一问题,将伪深度域算法应用于LSRTM,以提高其计算效率。伪深度域波场稳定是因为引入了映射函数和速度,还有垂直轴算子,并将有限差分解从时间域转换为频率域。稳定性和收敛性分析表明,除了映射速度之外,黎曼轴的空间导数还应该通过傅里叶伪谱方法来近似,该方法使用一种特殊的类高斯脉冲函数来生成有限差分算子内复数震源项的向量矩阵,它是初始输入速度模型的微分形式,控制相关黎曼有限差分算子的CFL条件。合成数据的例子表明,这种方法在推导平滑的黎曼波场时更加稳定和高效,同时保持了Claerbout地下反射体的定位原则,也为新纵轴选择了合适的采样率,该采样率与脉冲小波的最大频率成反比,与给定模型中的最小速度值直接相关。 LSRTM波场外推法采用二维常密度声波方程,通过考虑速度场分布的变化,将其转换为相应的伪深度域,从而解决真深度域的过采样问题。对于笛卡尔坐标系中的每个点,伪深度域中都有一个对应点。因此,我们可以通过笛卡尔到伪深度映射函数,在新坐标系下对重建的有限差分模拟波场进行插值和重塑。无论采用何种有限差分算法和边界条件,伪深度域的波场外推都能保证较高的精度和效率。通过对合成数据和实际数据的测试,与传统的LSRTM结果相比,伪深度域LSRTM在保幅成像方面显示出巨大的潜力。另一方面,伪深度域LSRTM在计算效率和计算精度方面也有很大优势。
    Keywords: Geophysics ; Seismic Waves Propagationa and Imaging
    Repository Name: AquaDocs
    Type: Thesis/Dissertation
    Format: 93
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  • 8
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    White Rose University Press | White Rose University Press
    Publication Date: 2022-12-06
    Description: In Hidden Depths, Professor Penny Spikins explores how our emotional connections have shaped human ancestry. Focusing on three key transitions in human origins, Professor Spikins explains how the emotional capacities of our early ancestors evolved in response to ecological changes, much like similar changes in other social mammals. For each transition, dedicated chapters examine evolutionary pressures, responses in changes in human emotional capacities and the archaeological evidence for human social behaviours. Starting from our earliest origins, in Part One, Professor Spikins explores how after two million years ago, movement of human ancestors into a new ecological niche drove new types of collaboration, including care for vulnerable members of the group. Emotional adaptations lead to cognitive changes, as new connections based on compassion, generosity, trust and inclusion also changed our relationship to material things. Part Two explores a later key transition in human emotional capacities occurring after 300,000 years ago. At this time changes in social tolerance allowed ancestors of our own species to further reach out beyond their local group and care about distant allies, making human communities resilient to environmental changes. An increasingly close relationship to animals, and even to cherished possessions, appeared at this time, and can be explained through new human vulnerabilities and ways of seeking comfort and belonging. Lastly, Part Three focuses on the contrasts in emotional dispositions arising between ourselves and our close cousins, the Neanderthals. Neanderthals are revealed as equally caring yet emotionally different humans, who might, if things had been different, have been in our place today. This new narrative breaks away from traditional views of human evolution as exceptional or as a linear progression towards a more perfect form. Instead, our evolutionary history is situated within similar processes occurring in other mammals, and explained as one in which emotions, rather than ‘intellect’, were key to our evolutionary journey. Moreover, changes in emotional capacities and dispositions are seen as part of differing pathways each bringing strengths, weaknesses and compromises. These hidden depths provide an explanation for many of the emotional sensitivities and vulnerabilities which continue to influence our world today.
    Keywords: Human demography ; Group size ; Lithic transfers ; Raw material movements ; Bonobos ; Dog burial ; Comfort ; Symbolic objects ; Symbolism ; Mobiliary art ; Attachment fluidity ; Hypersociability ; Human-animal relationships ; Dog domestication ; Attachment object ; Approachability ; Approach behaviour ; Avoidance behaviour ; Androgens ; Physiological responses ; Cognitive Archaeology ; Autism Spectrum Condition ; Handaxe ; Biface ; Neurodiversity ; Palaeolithic stone tools ; Evolution of neurodiversity ; Rock art ; Ice age art ; Material Culture ; Cultural transmission ; Emotional commitment ; Biopsychosocial approach ; Social tolerance ; Attachment ; Genus Homo ; Acheulian ; Cultural evolution ; Skeletal abnormality ; Injury ; Illness ; Interdependence ; Emotional sensitivity ; Moral emotions ; Evolution of Altruism ; Hominins ; Upper Palaeolithic ; Lower Palaeolithic ; Ecological niche ; Selective pressure ; Behavioural ecology ; Wolves ; Affective empathy ; Cognitive empathy ; Theory of mind ; Human Cognition ; Vulnerability ; Evolutionary Psychology ; Developmental psychology ; Helping behaviours ; Social cognition ; Social mammals ; Human Emotion ; Human social collaboration ; Generosity ; Emotional brain ; Social emotions ; Comparative behaviour ; Evolution ; Social carnivores ; Primate behavioural ecology ; Primate social systems ; Human Evolution ; Human ancestors ; Collaboration ; Evolutionary Biology ; Emotional vulnerability ; Social connection ; Decolonisation ; Social networks ; Middle Palaeolithic ; Community resilience ; Convergent evolution ; Chimpanzee ; Origin of modern humans ; Social safeness ; Wolf domestication ; Cherished possessions ; Compensatory attachment ; Loneliness ; Palaeolithic art ; Stress reactivity ; Bonding hormones ; Humans ; Hunter-gatherers ; Intergroup collaboration ; Tolerance ; Emotional connection ; Autism ; Trust ; Early Prehistory ; Palaeopathology ; Origins of healthcare ; Human self-domestication ; Palaeolithic Archaeology ; Social brain ; Care-giving ; Empathy ; Neanderthals ; Compassion ; Social Connection ; Evolution of Emotions ; Human Origins ; Adaptation ; Prehistory ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHM Anthropology ; bic Book Industry Communication::H Humanities::HD Archaeology ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences::PSA Life sciences: general issues::PSAF Ecological science, the Biosphere ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences::PSA Life sciences: general issues::PSAJ Evolution ; bic Book Industry Communication::J Society & social sciences::JP Politics & government::JPW Political activism::JPWQ Revolutionary groups & movements ; bic Book Industry Communication::J Society & social sciences::JM Psychology
    Language: English
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  • 9
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    De Gruyter | De Gruyter Open Poland
    Publication Date: 2022-11-22
    Description: This edited volume examines the opportunities to think, do, and/or create jointly afforded by digital storytelling. The contributors discuss digital storytelling in the context of educational programs, teaching anthropology, and ethnographic research involving a variety of populations and subjects that will appeal to researchers and practitioners engaged with qualitative methods and pedagogies that rely on media technology.
    Keywords: Discourse ; Climate Change ; Humans ; Nature ; Oceania ; Resilience ; Environmental Ethics ; Environmental Change ; Worldview ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFF Social issues & processes::JFFC Social impact of disasters ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFH Popular beliefs & controversial knowledge::JFHF Folklore, myths & legends ; bic Book Industry Communication::J Society & social sciences::JF Society & culture: general::JFS Social groups::JFSL Ethnic studies::JFSL9 Indigenous peoples ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHB Sociology::JHBD Population & demography ; bic Book Industry Communication::J Society & social sciences::JH Sociology & anthropology::JHM Anthropology ; bic Book Industry Communication::P Mathematics & science::PS Biology, life sciences::PSX Human biology::PSXM Medical anthropology
    Language: English
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  • 10
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    Frontiers Media SA
    Publication Date: 2024-03-31
    Description: Echolocation has evolved in different groups of animals, from bats and cetaceans to birds and humans, and enables localization and tracking of objects in a dynamic environment, where light levels may be very low or absent. Nature has shaped echolocation, an active sense that engages audiomotor feedback systems, which operates in diverse environments and situations. Echolocation production and perception vary across species, and signals are often adapted to the environment and task. In the last several decades, researchers have been studying the echolocation behavior of animals, both in the air and underwater, using different methodologies and perspectives. The result of these studies has led to rich knowledge on sound production mechanisms, directionality of the sound beam, signal design, echo reception and perception. Active control over echolocation signal production and the mechanisms for echo processing ultimately provide animals with an echoic scene or image of their surroundings. Sonar signal features directly influence the information available for the echolocating animal to perceive images of its environment. In many echolocating animals, the information processed through echoes elicits a reaction in motor systems, including adjustments in subsequent echolocation signals. We are interested in understanding how echolocating animals deal with different environments (e.g. clutter, light levels), tasks, distance to targets or objects, different prey types or other food sources, presence of conspecifics or certain predators, ambient and anthropogenic noise. In recent years, some researchers have presented new data on the origins of echolocation, which can provide a hint of its evolution. Theoreticians have addressed several issues that bear on echolocation systems, such as frequency or time resolution, target localization and beam-forming mechanisms. In this Research Topic we compiled recent work that elucidates how echolocation – from sound production, through echolocation signals to perception- has been shaped by nature functioning in different environments and situations. We strongly encouraged comparative approaches that would deepen our understanding of the processes comprising this active sense.
    Keywords: QP1-981 ; Q1-390 ; bats ; Biosonar ; Humans ; marine mammals ; sensory biology ; Birds ; Behavior ; Communication ; thema EDItEUR::M Medicine and Nursing::MF Pre-clinical medicine: basic sciences::MFG Physiology
    Language: English
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  • 11
    Publication Date: 2024-03-23
    Description: The Australian Continent: A Geophysical Synthesis is designed to provide a summary of the character of the Australian continent through the extensive information available at the continental scale, as a contribution to the understanding of Australia's lithospheric architecture and its evolution.The results build on the extensive databases assembled at Geoscience Australia, particularly for potential fields, supplemented by the full range of seismological information, mostly from The Australian National University. To aid in cross comparison of results from different disciplines, information is presented with a common projection and scales.
    Keywords: Australia ; Geophysics ; thema EDItEUR::1 Place qualifiers::1M Australasia, Oceania, Pacific Islands, Atlantic Islands::1MB Australia and New Zealand / Aotearoa ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences
    Language: English
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  • 12
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    Frontiers Media SA
    Publication Date: 2024-03-30
    Description: In the ancient past, cocoa has been appreciated as a high-calorie food to boost energy in soldiers and for its undefined medicinal and mystical properties. During other times, chocolate has been considered as the forbidden “food of God”: a treasure of pleasure for the mind and the soul. The overall perception of the consumer for chocolate was of a “charming” and appealing food with lots of negative aspects related to high sugar content leading to consider chocolate as “junk food” for its “obesigen” calories. Recently, in association with the renewed interest of nutrition science in alternative source of health-promoting foods and ingredients, a large body of research has been conducted to unravel the pro and cons of cocoa in relation to human health. Epidemiological evidences indicate that cocoa consumption helps preventing cardiovascular disease for its high content in bioactive flavonoids. Clinical trials show that chocolate consumption might improve vascular function, decreasing platelet aggregation and display an antioxidant and anti-inflammatory effect. The putative protective action of cocoa seems to be multi-factorial and involving different aspects of vascular, antioxidant and endothelial function. However, the mechanism(s) that account for the benefits of cocoa it is still unclear. The aim of this Research Topic is therefore to provide the reader with an objective picture of the state of art on the association between cocoa and health, mainly through the evidences of human trials; overwhelmingly considered the golden standard for nutritional science. The Research Topic will cover the analysis of the manufacturing processes of the chocolate and the antioxidant effects in humans as well as the majority of the putative health effects of chocolate and cocoa, such as anti-inflammatory properties, effect on immunity, platelet aggregation, blood pressure, endothelial function and cognitive behavior. Unraveling the functional properties of cocoa will help to understand if the 'food of God' is a primordial gift for the health of mankind.
    Keywords: R5-920 ; RC581-607 ; TX341-641 ; Antioxidants ; Obesity ; Flavonoids ; Humans ; Chocolate ; Blood pressure ; Inflammation ; Cognitive function ; Cocoa ; Immunity
    Language: English
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  • 13
    Publication Date: 2024-04-05
    Description: This eBook comprises s series of original research and review articles dealing with the anatomical, genetic, and physiological organization of the auditory system from humans to monkeys and mice.
    Keywords: RC321-571 ; Q1-390 ; audition ; monkeys ; gens ; translational ; Humans ; Rodents ; Memory ; Perception ; Physiology ; functional imaging ; Anatomy ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAN Neurosciences
    Language: English
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  • 14
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    Springer Nature
    Publication Date: 2024-04-07
    Description: This open access peer-reviewed volume was inspired by the UNESCO UNITWIN Network for Underwater Archaeology International Workshop held at Flinders University, Adelaide, Australia in November 2016. Content is based on, but not limited to, the work presented at the workshop which was dedicated to 3D recording and interpretation for maritime archaeology. The volume consists of contributions from leading international experts as well as up-and-coming early career researchers from around the globe. The content of the book includes recording and analysis of maritime archaeology through emerging technologies, including both practical and theoretical contributions. Topics include photogrammetric recording, laser scanning, marine geophysical 3D survey techniques, virtual reality, 3D modelling and reconstruction, data integration and Geographic Information Systems. The principal incentive for this publication is the ongoing rapid shift in the methodologies of maritime archaeology within recent years and a marked increase in the use of 3D and digital approaches. This convergence of digital technologies such as underwater photography and photogrammetry, 3D sonar, 3D virtual reality, and 3D printing has highlighted a pressing need for these new methodologies to be considered together, both in terms of defining the state-of-the-art and for consideration of future directions. As a scholarly publication, the audience for the book includes students and researchers, as well as professionals working in various aspects of archaeology, heritage management, education, museums, and public policy. It will be of special interest to those working in the field of coastal cultural resource management and underwater archaeology but will also be of broader interest to anyone interested in archaeology and to those in other disciplines who are now engaging with 3D recording and visualization.
    Keywords: Geography ; Remote sensing ; Archaeology ; Coasts ; Application software ; Geophysics ; thema EDItEUR::N History and Archaeology::NH History ; thema EDItEUR::N History and Archaeology::NK Archaeology ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RG Geography::RGB Physical geography and topography::RGBP Coastlines ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RG Geography::RGW Geographical information systems, geodata and remote sensing
    Language: English
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    IntechOpen | IntechOpen
    Publication Date: 2024-04-05
    Description: Hyperspectral imagery has received considerable attention in the last decade as it provides rich spectral information and allows the analysis of objects that are unidentifiable by traditional imaging techniques. It has a wide range of applications, including remote sensing, industry sorting, food analysis, biomedical imaging, etc. However, in contrast to RGB images from which information can be intuitively extracted, hyperspectral data is only useful with proper processing and analysis. This book covers theoretical advances of hyperspectral image processing and applications of hyperspectral processing, including unmixing, classification, super-resolution, and quality estimation with classical and deep learning methods.
    Keywords: Geophysics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics
    Language: English
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  • 16
    Publication Date: 2024-04-05
    Description: The global population aged over 60 is set to rise dramatically in the coming decades. In many countries, the older population now faces the prospect of spending a quarter of their lives aged over 65, and a significant proportion will have to cope with cognitive decline associated with normal ageing or with dementia disorders. Given that these fundamental demographic changes will pose a significant challenge to health care systems, a detailed understanding of age-related cognitive and neurobiological changes is essential in helping elderly populations maintain cognitive performance. In addition, developing sensitive biomarkers to identify those at risk of developing dementia is crucial for early and effective interventions. To make inferences about the ageing process from the animal model back to the human, rigorous behavioral paradigms must be used to ensure that the same function is being examined across species. Given that similar navigational paradigms can easily be applied to humans and animals, recent years have seen an expansion of studies attempting to bridge the gap between age-related changes in animal and human spatial cognition. These studies begin to suggest that disruptions in spatial computations are among the earliest indicators of impending cognitive decline. In addition, although many animal studies have identified pathological mechanisms with paradigms involving spatial navigation, these mechanisms support many nonspatial cognitive functions as well. As a consequence, a successful characterization of how spatial processing changes in the ageing brain could reveal fundamental effects of cognitive ageing that could inform about general mechanisms underlying decline in perception, mnemonic processing and multisensory integration.
    Keywords: RC321-571 ; Q1-390 ; Neuroscience ; spatial navigation ; Humans ; Aging ; Animal Models ; Dementia ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAN Neurosciences
    Language: English
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    IntechOpen | IntechOpen
    Publication Date: 2024-04-05
    Description: The book “Geophysics and Ocean Waves Studies” presents the collected chapters in two sections named “Geophysics” and “Ocean Waves Studies”. The first section, “Geophysics”, provides a thorough overview of using different geophysical methods including gravity, self-potential, and EM in exploration. Moreover, it shows the significance of rock physics properties and enhanced oil recovery phases during oil reservoir production. The second section, “Ocean Waves Studies”, is intended to provide the reader with a strong description of the latest developments in the physical and numerical description of wind-generated and long waves, including some new features discovered in the last few years. The section is organized with the aim to introduce the reader from offshore to nearshore phenomena including a description of wave dissipation and large-scale phenomena (i.e., storm surges and landslide-induced tsunamis). This book shall be of great interest to students, scientists, geologists, geophysicists, and the investment community.
    Keywords: Geophysics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics
    Language: English
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  • 18
    Publication Date: 2024-04-04
    Description: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact
    Keywords: drugs ; Behavior ; Memory tasks ; pre-clinical ; clinical ; Humans ; Animals ; thema EDItEUR::P Mathematics and Science::PD Science: general issues ; thema EDItEUR::M Medicine and Nursing::MK Medical specialties, branches of medicine::MKG Pharmacology
    Language: English
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    IntechOpen | IntechOpen
    Publication Date: 2024-04-05
    Description: The book Radioisotopes - Applications in Physical Sciences is divided into three sections namely: Radioisotopes and Some Physical Aspects, Radioisotopes in Environment and Radioisotopes in Power System Space Applications. Section I contains nine chapters on radioisotopes and production and their various applications in some physical and chemical processes. In Section II, ten chapters on the applications of radioisotopes in environment have been added. The interesting articles related to soil, water, environmental dosimetry/tracer and composition analyzer etc. are worth reading. Section III has three chapters on the use of radioisotopes in power systems which generate electrical power by converting heat released from the nuclear decay of radioactive isotopes. The system has to be flown in space for space exploration and radioisotopes can be a good alternative for heat-to-electrical energy conversion. The reader will very much benefit from the chapters presented in this section.
    Keywords: Geophysics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics
    Language: English
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  • 20
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    Springer Nature | Springer
    Publication Date: 2024-04-05
    Description: This open access book explores the interactions between water and earthquakes, including recent concerns about induced seismicity. It further highlights that a better understanding of the response of the water system to disturbances such as earthquakes is needed to safeguard water resources, to shield underground waste repositories, and to mitigate groundwater contamination. Although the effects of earthquakes on streams and groundwater have been reported for thousands of years, this field has only blossomed into an active area of research in the last twenty years after quantitative and continuous documentation of field data became available. This volume gathers the important advances that have been made in the field over the past decade, which to date have been scattered in the form of research articles in various scientific journals.
    Keywords: Geophysics/Geodesy ; Hydrology/Water Resources ; Hydrogeology ; Natural Hazards ; Solid Earth Sciences ; Water ; Earth Sciences ; Groundwater Response ; water-induced seismicity ; Liquefaction ; Mud Volcanoes ; Stream discharge ; Hydrologic Precursors ; Hydrologic changes after earthquakes ; Induced seismicity ; Open Access ; Geophysics ; Hydrology & the hydrosphere ; Natural disasters ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RB Earth sciences::RBK Hydrology and the hydrosphere ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning::RN The environment::RNR Natural disasters
    Language: English
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    IntechOpen | IntechOpen
    Publication Date: 2024-04-05
    Description: The importance of Geographic Information Systems (GIS) can hardly be overemphasized in today’s academic and professional arena. More professionals and academics have been using GIS than ever – urban & regional planners, civil engineers, geographers, spatial economists, sociologists, environmental scientists, criminal justice professionals, political scientists, and alike. As such, it is extremely important to understand the theories and applications of GIS in our teaching, professional work, and research. “The Application of Geographic Information Systems” presents research findings that explain GIS’s applications in different subfields of social sciences. With several case studies conducted in different parts of the world, the book blends together the theories of GIS and their practical implementations in different conditions. It deals with GIS’s application in the broad spectrum of geospatial analysis and modeling, water resources analysis, land use analysis, infrastructure network analysis like transportation and water distribution network, and such. The book is expected to be a useful source of knowledge to the users of GIS who envision its applications in their teaching and research. This easy-to-understand book is surely not the end in itself but a little contribution to toward our understanding of the rich and wonderful subject of GIS.
    Keywords: Geophysics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics
    Language: English
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  • 22
    Publication Date: 2022-01-31
    Description: Recent advances in environmental magnetism offer the opportunity to link the magnetic signature of marine and continental rocks to the paleoenvironmental and paleoclimatic settings that controlled their formation or deposition, as well as to post-depositional events, such as diagenesis, that can alter their primary signature. This Research Topic assembles studies that used state of the art rock magnetic techniques to unravel the causes and effects of catastrophic geological events, including tsunami, meteorite impacts, Archean oxygenation event, geomagnetic reversals, and global climate changes linked to large volcanic eruptions.
    Keywords: GB3-5030 ; Q1-390 ; rock magnetism ; Geology ; paleomagnetism ; Geophysics ; extreme events
    Language: English
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  • 23
    Publication Date: 2024-04-05
    Description: This open access book provides an overview of the building blocks necessary for managing, steering and guiding the establishment of a research infrastructure (RI). It offers valuable insights into RI investment, access and management at the academic, grants management, agency and policy level, and serves as a useful guide for the research community, students, and those in the private sector wishing to understand the approaches and opportunities involved in the establishment, maintenance and management of research infrastructure platforms. Presenting a holistic view of RI investment and granting cycles from a South African perspective, the book’s target audience includes those working in science diplomacy, policymaking and science grants councils (especially in Africa) as well as funders and donors.
    Keywords: Earth sciences ; Geophysics ; thema EDItEUR::P Mathematics and Science::PH Physics::PHV Applied physics::PHVG Geophysics
    Language: English
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  • 24
    Publication Date: 2023-08-09
    Description: Sedimentäre Strukturen können die Fließ- und Stofftransportpfade in feinkörnigen Talfüllungen stark beeinflussen. Diese Strukturen müssen gezielt auf ihre Ausdehnung und Eigenschaften untersucht werden, um Verweilzeiten, Fließpfade und das Abbaupotenzial eingetragener Schadstoffe zu bestimmen. In der quartären Talfüllung der Ammeraue bei Tübingen wurden beispielhaft Torflagen und eine Kiesrinne untersucht, um ihre Einflüsse auf die regionale Hydrogeologie und Hydrochemie zu bewerten. Dafür wurden geophysikalische und hydrogeologische Erkundungsmethoden ausgewählt und kombiniert. Mit geoelektrischen Oberflächenmessungen konnte die Ausdehnung der betrachteten Strukturen erkundet werden. Unterschiedliche Direct-Push-Sondierungen, darunter eine In-situ-Bestimmung der Sedimentfarbe, und bohrlochgeophysikalische Messungen erfassten ihre Geometrie und interne Heterogenität. Die hydraulischen und biogeochemischen Eigenschaften der Sedimente und des Grundwassers wurden anschließend durch gezielte Probennahmen und hydraulische Tests an repräsentativen Ansatzpunkten bestimmt. Die dargestellte Methodenkombination zur Abgrenzung relevanter Teilgebiete mit anschließender hochauflösender Untersuchung lässt sich auch auf die Untersuchung großflächiger Täler übertragen.
    Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
    Description: Eberhard Karls Universität Tübingen (1020)
    Description: Eberhard Karls Universität Tübingen (1020)
    Keywords: ddc:551.49 ; Geophysik ; Standortuntersuchung ; Auengebiet ; Direct-Push ; Sedimentäre Strukturen ; Geophysics ; Site characterization ; Floodplain ; Direct-push ; Sedimentary features
    Language: German
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  • 25
    Publication Date: 2023-06-14
    Description: Complex geology in glacial terrain makes groundwater exploration challenging for water supply companies. Abrupt lateral changes of geological conditions, for example, raise the risk of unsuccessful exploration drilling. At some locations, local water supply companies experience a large number of dry wells, raising the need for better exploration approaches. The use of geophysical techniques enables the detection and characterization of subsurface structures in terms of aquifers and aquitards. We present two examples in which seismic and resistivity methods are combined for subsurface characterization. A thrust structure is detected in the Varde study area in Denmark and a channel structure is mapped in the Hamburg-Sülldorf study area in Germany. The different imaging characteristics of seismic P‑ and S‑waves are demonstrated. The combination of seismic and resistivity methods enables delineating groundwater-bearing and groundwater-barrier layers down to a depth of 150 m.
    Description: Interreg North Sea Region Programme
    Description: Leibniz-Institut für Angewandte Geophysik (3464)
    Keywords: ddc:622.15 ; Seismic reflection ; Electrical resistivity ; P‑waves ; S‑waves ; Geophysics ; Reflexionsseismik ; Widerstandsverfahren ; P‑Wellen ; S‑Wellen ; Geophysik
    Language: English
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  • 26
    Publication Date: 2024-01-15
    Description: Geothermal heat flow in the polar regions plays a crucial role in understanding ice-sheet dynamics and predictions of sea level rise. Continental-scale indirect estimates often have a low spatial resolution and yield largest discrepancies in West Antarctica. Here we analyse geophysical data to estimate geothermal heat flow in the Amundsen Sea Sector of West Antarctica. With Curie depth analysis based on a new magnetic anomaly grid compilation, we reveal variations in lithospheric thermal gradients. We show that the rapidly retreating Thwaites and Pope glaciers in particular are underlain by areas of largely elevated geothermal heat flow, which relates to the tectonic and magmatic history of the West Antarctic Rift System in this region. Our results imply that the behavior of this vulnerable sector of the West Antarctic Ice Sheet is strongly coupled to the dynamics of the underlying lithosphere.
    Description: The Amundsen Sea sector, Antarctica, is underlain by shallow Curie depths – where the magnetic properties of rocks change – according to airborne magnetic data. This suggests high geothermal heat flow in this region of the West Antarctic Rift System.
    Description: Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (Alfred-Wegener- Institute, Helmholtz Centre for Polar and Marine Research) https://doi.org/10.13039/501100003207
    Description: European Space Agency (ESA) https://doi.org/10.13039/501100000844
    Description: Deutsche Forschungsgemeinschaft (German Research Foundation) https://doi.org/10.13039/501100001659
    Description: https://doi.org/10.1594/PANGAEA.932452
    Keywords: ddc:551.1 ; Cryospheric science ; Geomagnetism ; Geophysics ; West Antarctica ; Amundsen Sea sector
    Language: English
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldman, L R -- New York, N.Y. -- Science. 1998 Dec 4;282(5395):1825-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9874633" target="_blank"〉PubMed〈/a〉
    Keywords: Child ; Environmental Exposure ; Environmental Pollutants/adverse effects ; Government Agencies ; Humans ; Lead/adverse effects ; Lead Poisoning/*prevention & control ; United States ; United States Environmental Protection Agency
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spear, P G -- New York, N.Y. -- Science. 1998 Dec 11;282(5396):1999-2000.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Northwestern University Medical School, Department of Microbiology-Immunology, Chicago, IL 60611, USA. p-spear@nwu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9874652" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Adhesion ; Cytoskeletal Proteins/genetics/*metabolism ; Dystroglycans ; Humans ; Laminin/metabolism ; Lassa Fever/*virology ; Lassa virus/*metabolism ; Leprosy/*microbiology ; Lymphocytic choriomeningitis virus/metabolism ; Membrane Glycoproteins/genetics/*metabolism ; Models, Biological ; Mycobacterium leprae/*metabolism ; Receptors, Virus/metabolism ; Schwann Cells/microbiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Gough, M -- New York, N.Y. -- Science. 1998 Dec 4;282(5395):1823.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9874631" target="_blank"〉PubMed〈/a〉
    Keywords: 2,4,5-Trichlorophenoxyacetic Acid/adverse effects ; 2,4-Dichlorophenoxyacetic Acid/adverse effects ; Confidentiality/*legislation & jurisprudence ; Defoliants, Chemical ; Financing, Government ; Humans ; *Public Policy ; Research/*legislation & jurisprudence ; *Research Support as Topic ; Tetrachlorodibenzodioxin/adverse effects ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Adams, M W -- Stiefel, E I -- New York, N.Y. -- Science. 1998 Dec 4;282(5395):1842-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA. adams@bmb.uga.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9874636" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Binding Sites ; Carbon Monoxide/chemistry ; Clostridium/*enzymology ; Crystallography, X-Ray ; Cyanides/chemistry ; Humans ; Hydrogen/*metabolism ; Hydrogenase/*chemistry/*metabolism ; Iron/chemistry ; Ligands ; Oxidation-Reduction ; Pyruvic Acid/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pennisi, E -- New York, N.Y. -- Science. 1998 Dec 11;282(5396):1972-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9874643" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Caenorhabditis elegans/cytology/*genetics/physiology ; Cell Lineage ; Chromosome Mapping ; DNA, Helminth/chemistry/genetics ; Evolution, Molecular ; Gene Expression Regulation ; *Genes, Helminth ; Genetic Techniques ; *Genome ; Humans ; Mutation ; *Sequence Analysis, DNA
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 32
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-09-08
    Description: Postdoctoral appointments can have different functions and meanings, depending on the field and whether the postdoc is a man or a woman. The Ph.D.'s-Ten Years Later study confirmed that in biochemistry, the postdoc, not the Ph.D., has become the general proving ground for excellence both in academia and industry. Because they spent a longer time in these "mandatory" postdocs, biochemists had the largest proportion of untenured faculty 10 to 13 years after the Ph. D. In mathematics, where substantially fewer postdoctoral positions are available, Ph.D.'s taking postdocs are more likely to obtain faculty positions, but this is true only for men. University administrators should be accountable for monitoring the total time spent in these positions and should provide administrative assistance for skills training, career growth, and the job search. In addition, creative solutions concerning the dual-career couple phenomenon are necessary.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nerad, M -- Cerny, J -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1533-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Graduate Division, University of California, Berkeley, 424 Sproul Hall, Berkeley, CA 94720-5900, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10477510" target="_blank"〉PubMed〈/a〉
    Keywords: *Biochemistry/education ; *Career Mobility ; *Education, Graduate ; Employment ; Faculty ; *Fellowships and Scholarships ; Female ; Humans ; Male ; *Mathematics ; Salaries and Fringe Benefits ; Societies, Scientific ; Time Factors ; United States ; Universities
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 33
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Couzin, J -- New York, N.Y. -- Science. 1998 Dec 18;282(5397):2175-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9890822" target="_blank"〉PubMed〈/a〉
    Keywords: Budgets ; Cartilage ; *Complementary Therapies/economics/organization & administration ; Controlled Clinical Trials as Topic ; Humans ; Lung Neoplasms/therapy ; National Institutes of Health (U.S.)/economics/*organization & administration ; Research Support as Topic ; Tissue Extracts/therapeutic use ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 34
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-09-04
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Aug 13;285(5430):999.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10475850" target="_blank"〉PubMed〈/a〉
    Keywords: Biotechnology/history ; Genetics, Medical/history ; Genome, Human ; History, 20th Century ; Humans ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 35
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Collignon, P -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1855-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610574" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibodies, Viral/analysis ; *Gammaretrovirus/immunology ; Humans ; Retroviridae Infections/diagnosis/*transmission ; *Swine/virology ; *Transplantation, Heterologous/adverse effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-05-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):578-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10328734" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Electric Stimulation ; Electrodes ; Electrodes, Implanted ; *Electronics ; Electrophysiology ; Humans ; Nerve Net/*physiology ; Nervous System Diseases/*therapy ; Neurons/*physiology ; Rats ; Silicon ; *Transistors, Electronic
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nilsson, A -- Rose, J -- New York, N.Y. -- Science. 1999 Oct 29;286(5441):894.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577238" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Specimen Banks/legislation & jurisprudence ; Biotechnology ; Ethics Committees ; *Ethics, Research ; *Genetic Privacy ; *Genetic Research ; Government Regulation ; Humans ; *Privacy/legislation & jurisprudence ; Public Policy ; Sweden
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  • 38
    Publication Date: 1999-09-25
    Description: The flow of information from calcium-mobilizing receptors to nuclear factor of activated T cells (NFAT)-dependent genes is critically dependent on interaction between the phosphatase calcineurin and the transcription factor NFAT. A high-affinity calcineurin-binding peptide was selected from combinatorial peptide libraries based on the calcineurin docking motif of NFAT. This peptide potently inhibited NFAT activation and NFAT-dependent expression of endogenous cytokine genes in T cells, without affecting the expression of other cytokines that require calcineurin but not NFAT. Substitution of the optimized peptide sequence into the natural calcineurin docking site increased the calcineurin responsiveness of NFAT. Compounds that interfere selectively with the calcineurin-NFAT interaction without affecting calcineurin phosphatase activity may be useful as therapeutic agents that are less toxic than current drugs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Aramburu, J -- Yaffe, M B -- Lopez-Rodriguez, C -- Cantley, L C -- Hogan, P G -- Rao, A -- R01 AI 40127/AI/NIAID NIH HHS/ -- R01 GM056203/GM/NIGMS NIH HHS/ -- R01 HL 03601/HL/NHLBI NIH HHS/ -- R43 AI 43726/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2129-33.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10497131" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Binding Sites ; Calcineurin/*metabolism ; Calcineurin Inhibitors ; Cell Nucleus/metabolism ; Cyclosporine/pharmacology ; Cytokines/biosynthesis/genetics ; DNA-Binding Proteins/*antagonists & inhibitors/chemistry/metabolism ; Gene Expression Regulation ; Genes, Reporter ; HeLa Cells ; Humans ; Immunosuppressive Agents/chemistry/metabolism/*pharmacology ; Jurkat Cells ; Molecular Sequence Data ; NFATC Transcription Factors ; *Nuclear Proteins ; Oligopeptides/chemistry/metabolism/*pharmacology ; Peptide Library ; Peptides/chemistry/metabolism/*pharmacology ; Phosphorylation ; Recombinant Fusion Proteins/metabolism ; T-Lymphocytes/*drug effects/immunology ; Transcription Factors/*antagonists & inhibitors/chemistry/metabolism ; Transfection
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shapiro, H T -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2065.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523197" target="_blank"〉PubMed〈/a〉
    Keywords: Advisory Committees ; *Bioethical Issues ; Embryo Research ; Embryo, Mammalian/*cytology ; Ethics Committees ; Financing, Government ; Government Regulation ; Humans ; Private Sector ; *Public Policy ; Research/*standards ; Research Support as Topic ; *Stem Cells ; United States
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-05-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Landick, R -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):598-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, USA. landick@macc.wisc.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10328742" target="_blank"〉PubMed〈/a〉
    Keywords: Base Pairing ; Binding Sites ; DNA/chemistry/*metabolism ; DNA-Directed RNA Polymerases/genetics/*metabolism ; Escherichia coli/enzymology/genetics ; Gene Expression Regulation ; Humans ; Models, Genetic ; Mutation ; Nucleic Acid Conformation ; Oligodeoxyribonucleotides, Antisense/chemistry/metabolism ; RNA, Messenger/chemistry/*metabolism ; *Terminator Regions, Genetic ; *Transcription, Genetic ; Viral Proteins/metabolism
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  • 41
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):21-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10428690" target="_blank"〉PubMed〈/a〉
    Keywords: *Genetic Techniques ; *Genome, Human ; Humans ; *Mutation ; *Polymorphism, Genetic
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  • 42
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-04-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Service, R F -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):33-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10215526" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Arrhythmias, Cardiac/physiopathology ; Calcium/metabolism ; Calcium-Binding Proteins/metabolism ; Cardiac Output, Low/*physiopathology ; Chronic Disease ; *Computer Simulation ; Heart/*physiopathology ; Humans ; *Models, Cardiovascular ; *Myocardial Contraction ; Potassium/metabolism ; Potassium Channels/metabolism
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-05-21
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hagmann, M -- New York, N.Y. -- Science. 1999 Apr 30;284(5415):723, 725.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10336390" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Breast Neoplasms/*genetics/pathology ; *Disease Models, Animal ; Female ; *Genes, BRCA1 ; Genes, p53 ; Humans ; Mammary Glands, Animal/pathology ; Mammary Neoplasms, Animal/*genetics/pathology ; Mice ; Mice, Knockout ; Mice, Transgenic ; Mutation
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  • 44
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-04-30
    Description: Notch signaling defines an evolutionarily ancient cell interaction mechanism, which plays a fundamental role in metazoan development. Signals exchanged between neighboring cells through the Notch receptor can amplify and consolidate molecular differences, which eventually dictate cell fates. Thus, Notch signals control how cells respond to intrinsic or extrinsic developmental cues that are necessary to unfold specific developmental programs. Notch activity affects the implementation of differentiation, proliferation, and apoptotic programs, providing a general developmental tool to influence organ formation and morphogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Artavanis-Tsakonas, S -- Rand, M D -- Lake, R J -- NS26084/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 30;284(5415):770-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Massachusetts General Hospital Cancer Center, Department of Cell Biology, Harvard Medical School, Building 149, 13th Street, Charlestown, MA 02129, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10221902" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Cell Communication ; Cell Division ; Cell Nucleus/metabolism ; Humans ; Intracellular Signaling Peptides and Proteins ; Ligands ; Membrane Proteins/*physiology ; Receptors, Cell Surface/*physiology ; Receptors, Notch ; *Signal Transduction ; Transcription, Genetic
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  • 45
    Publication Date: 1999-04-24
    Description: The lack of an adequate hominid fossil record in eastern Africa between 2 and 3 million years ago (Ma) has hampered investigations of early hominid phylogeny. Discovery of 2.5 Ma hominid cranial and dental remains from the Hata beds of Ethiopia's Middle Awash allows recognition of a new species of Australopithecus. This species is descended from Australopithecus afarensis and is a candidate ancestor for early Homo. Contemporary postcranial remains feature a derived humanlike humeral/femoral ratio and an apelike upper arm-to-lower arm ratio.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Asfaw, B -- White, T -- Lovejoy, O -- Latimer, B -- Simpson, S -- Suwa, G -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):629-35.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Rift Valley Research Service, Post Office Box 5717, Addis Ababa, Ethiopia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10213683" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Bones of Upper Extremity/anatomy & histology ; Dentition ; Ethiopia ; *Fossils ; History, Ancient ; Hominidae/anatomy & histology/*classification ; Humans ; Leg Bones/anatomy & histology ; Paleodontology ; Phylogeny ; Skull/anatomy & histology ; Terminology as Topic ; Tooth/anatomy & histology
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  • 46
    Publication Date: 1999-11-05
    Description: The Brca1 (breast cancer gene 1) tumor suppressor protein is phosphorylated in response to DNA damage. Results from this study indicate that the checkpoint protein kinase ATM (mutated in ataxia telangiectasia) was required for phosphorylation of Brca1 in response to ionizing radiation. ATM resides in a complex with Brca1 and phosphorylated Brca1 in vivo and in vitro in a region that contains clusters of serine-glutamine residues. Phosphorylation of this domain appears to be functionally important because a mutated Brca1 protein lacking two phosphorylation sites failed to rescue the radiation hypersensitivity of a Brca1-deficient cell line. Thus, phosphorylation of Brca1 by the checkpoint kinase ATM may be critical for proper responses to DNA double-strand breaks and may provide a molecular explanation for the role of ATM in breast cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cortez, D -- Wang, Y -- Qin, J -- Elledge, S J -- GM44664/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1162-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Verna and Mars McLean Department of Biochemistry and Molecular Biology, Howard Hughes Medical Institute, Department of Cell Biology, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10550055" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Ataxia Telangiectasia/genetics ; Ataxia Telangiectasia Mutated Proteins ; BRCA1 Protein/*metabolism ; Breast Neoplasms/genetics ; Cell Cycle Proteins ; Cell Line ; *DNA Damage ; *DNA Repair ; DNA, Complementary ; DNA-Binding Proteins ; Female ; Gamma Rays ; Genes, BRCA1 ; Genetic Predisposition to Disease ; HeLa Cells ; Heterozygote ; Humans ; Molecular Sequence Data ; Mutation ; Phosphorylation ; Protein-Serine-Threonine Kinases/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Tumor Suppressor Proteins
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-02-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Haraldsdottir, R -- New York, N.Y. -- Science. 1999 Jan 22;283(5401):487.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9988648" target="_blank"〉PubMed〈/a〉
    Keywords: Bioethics ; Databases, Factual/*legislation & jurisprudence ; Genetic Privacy ; *Genetic Research ; Humans ; Iceland ; Medical Records Systems, Computerized/*legislation & jurisprudence ; Patient Advocacy
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  • 48
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-12-03
    Description: Polypeptides emerging from the ribosome must fold into stable three-dimensional structures and maintain that structure throughout their functional lifetimes. Maintaining quality control over protein structure and function depends on molecular chaperones and proteases, both of which can recognize hydrophobic regions exposed on unfolded polypeptides. Molecular chaperones promote proper protein folding and prevent aggregation, and energy-dependent proteases eliminate irreversibly damaged proteins. The kinetics of partitioning between chaperones and proteases determines whether a protein will be destroyed before it folds properly. When both quality control options fail, damaged proteins accumulate as aggregates, a process associated with amyloid diseases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickner, S -- Maurizi, M R -- Gottesman, S -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1888-93.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, National Cancer Institute, Bethesda, MD 20892-4255, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10583944" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphatases/metabolism ; Amyloid/metabolism ; Animals ; Endopeptidases/*metabolism ; Eukaryotic Cells/metabolism ; Humans ; Models, Biological ; Molecular Chaperones/*metabolism ; Prions/metabolism ; Prokaryotic Cells/metabolism ; Protein Biosynthesis ; *Protein Folding ; Proteins/*chemistry/*metabolism ; Ubiquitins/metabolism
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wickelgren, I -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):14-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9917254" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain/metabolism ; Cells, Cultured ; Dimerization ; Drug Design ; Humans ; Neurons/*metabolism ; Potassium Channels/metabolism ; Rats ; Receptors, GABA-B/*chemistry/*metabolism ; Signal Transduction ; gamma-Aminobutyric Acid/metabolism
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shastri, L -- New York, N.Y. -- Science. 1999 Sep 10;285(5434):1673-4.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523181" target="_blank"〉PubMed〈/a〉
    Keywords: Humans ; Infant ; *Learning ; *Mathematics ; *Neural Networks (Computer)
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  • 51
    Publication Date: 1999-12-22
    Description: The SGS1 gene of the yeast Saccharomyces cerevisiae encodes a DNA helicase with homology to the human Bloom's syndrome gene BLM and the Werner's syndrome gene WRN. The SRS2 gene of yeast also encodes a DNA helicase. Simultaneous deletion of SGS1 and SRS2 is lethal in yeast. Here, using a conditional mutation of SGS1, it is shown that DNA replication and RNA polymerase I transcription are drastically inhibited in the srs2Delta sgs1-ts strain at the restrictive temperature. Thus, SGS1 and SRS2 function in DNA replication and RNA polymerase I transcription. These functions may contribute to the various defects observed in Werner's and Bloom's syndromes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lee, S K -- Johnson, R E -- Yu, S L -- Prakash, L -- Prakash, S -- CA80882/CA/NCI NIH HHS/ -- GM19261/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Dec 17;286(5448):2339-42.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sealy Center for Molecular Science, University of Texas Medical Branch at Galveston, 6.104 Medical Research Building, 11th and Mechanic Streets, Galveston, TX 77555-1061, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10600744" target="_blank"〉PubMed〈/a〉
    Keywords: Bloom Syndrome/genetics ; Codon ; DNA Helicases/genetics/*physiology ; *DNA Replication ; DNA, Fungal/biosynthesis ; Fungal Proteins/genetics/*physiology ; Gene Deletion ; Genes, Fungal ; Humans ; Mutation ; RNA Polymerase I/metabolism ; RNA Polymerase II/metabolism ; RNA Polymerase III/metabolism ; RNA, Fungal/biosynthesis ; RNA, Messenger/biosynthesis/genetics ; RNA, Ribosomal/biosynthesis ; RNA, Transfer, Amino Acid-Specific/biosynthesis ; RecQ Helicases ; Saccharomyces cerevisiae/*genetics/metabolism ; *Saccharomyces cerevisiae Proteins ; *Transcription, Genetic ; Werner Syndrome/genetics
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-16
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Normile, D -- Pennisi, E -- New York, N.Y. -- Science. 1999 Sep 24;285(5436):2038-9.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10523188" target="_blank"〉PubMed〈/a〉
    Keywords: Chromosome Mapping ; Chromosomes, Human, Pair 22/*genetics ; Contig Mapping ; *Human Genome Project ; Humans ; International Cooperation ; *Sequence Analysis, DNA
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  • 53
    Publication Date: 1999-10-03
    Description: Precursors of alpha-defensin peptides require activation for bactericidal activity. In mouse small intestine, matrilysin colocalized with alpha-defensins (cryptdins) in Paneth cell granules, and in vitro it cleaved the pro segment from cryptdin precursors. Matrilysin-deficient (MAT-/-) mice lacked mature cryptdins and accumulated precursor molecules. Intestinal peptide preparations from MAT-/- mice had decreased antimicrobial activity. Orally administered bacteria survived in greater numbers and were more virulent in MAT-/- mice than in MAT+/+ mice. Thus, matrilysin functions in intestinal mucosal defense by regulating the activity of defensins, which may be a common role for this metalloproteinase in its numerous epithelial sites of expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wilson, C L -- Ouellette, A J -- Satchell, D P -- Ayabe, T -- Lopez-Boado, Y S -- Stratman, J L -- Hultgren, S J -- Matrisian, L M -- Parks, W C -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):113-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pediatrics, Division of Allergy and Pulmonary Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA. wilson_c@kids.wustl.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10506557" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Catalysis ; Cytoplasmic Granules/enzymology ; Escherichia coli/growth & development ; Escherichia coli Infections/immunology/microbiology ; Female ; Humans ; *Immunity, Innate ; *Immunity, Mucosal ; Intestinal Mucosa/enzymology/immunology/microbiology ; Intestine, Small/enzymology/*immunology/microbiology ; Male ; Matrix Metalloproteinase 7 ; Metalloendopeptidases/genetics/*metabolism ; Mice ; Molecular Sequence Data ; Paneth Cells/enzymology ; Protein Precursors/genetics/*metabolism ; Recombinant Fusion Proteins/metabolism ; Salmonella typhimurium/growth & development/pathogenicity ; Tissue Extracts/pharmacology
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Av-Gay, Y -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1621.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10383337" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/*genetics/pathogenicity ; *Biotechnology ; *Containment of Biohazards ; Ecosystem ; *Genetic Engineering ; Guidelines as Topic ; Humans ; United States ; Viruses/*genetics/pathogenicity
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-05-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Culotta, E -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):572-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10328732" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biological Evolution ; Ethiopia ; Facial Bones/anatomy & histology ; *Fossils ; History, Ancient ; *Hominidae/anatomy & histology/classification ; Humans ; Paleodontology ; Skull/anatomy & histology ; Tooth/anatomy & histology
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  • 56
    Publication Date: 1999-10-16
    Description: Dense genetic maps of human, mouse, and rat genomes that are based on coding genes and on microsatellite and single-nucleotide polymorphism markers have been complemented by precise gene homolog alignment with moderate-resolution maps of livestock, companion animals, and additional mammal species. Comparative genetic assessment expands the utility of these maps in gene discovery, in functional genomics, and in tracking the evolutionary forces that sculpted the genome organization of modern mammalian species.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Brien, S J -- Menotti-Raymond, M -- Murphy, W J -- Nash, W G -- Wienberg, J -- Stanyon, R -- Copeland, N G -- Jenkins, N A -- Womack, J E -- Marshall Graves, J A -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):458-62, 479-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Genomic Diversity, National Cancer Institute, Frederick, MD 21702-1201, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521336" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Domestic/genetics ; Base Sequence ; *Chromosome Mapping ; *Evolution, Molecular ; Genetic Markers ; *Genome ; *Genome, Human ; Humans ; Mammals/*genetics ; Mutation ; *Phylogeny ; Rodentia/genetics
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  • 57
    Publication Date: 1999-06-12
    Description: To monitor changes in alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA) receptor distribution in living neurons, the AMPA receptor subunit GluR1 was tagged with green fluorescent protein (GFP). This protein (GluR1-GFP) was functional and was transiently expressed in hippocampal CA1 neurons. In dendrites visualized with two-photon laser scanning microscopy or electron microscopy, most of the GluR1-GFP was intracellular, mimicking endogenous GluR1 distribution. Tetanic synaptic stimulation induced a rapid delivery of tagged receptors into dendritic spines as well as clusters in dendrites. These postsynaptic trafficking events required synaptic N-methyl-D-aspartate (NMDA) receptor activation and may contribute to the enhanced AMPA receptor-mediatedtransmission observed during long-term potentiation and activity-dependent synaptic maturation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shi, S H -- Hayashi, Y -- Petralia, R S -- Zaman, S H -- Wenthold, R J -- Svoboda, K -- Malinow, R -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1811-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10364548" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Dendrites/*metabolism/ultrastructure ; Electric Stimulation ; Hippocampus/cytology/physiology ; Humans ; Long-Term Potentiation ; *Neuronal Plasticity ; Neurons/*physiology ; Organ Culture Techniques ; Rats ; Receptor Aggregation ; Receptors, AMPA/*metabolism ; Receptors, N-Methyl-D-Aspartate/*physiology ; Recombinant Fusion Proteins/metabolism ; Synapses/metabolism/*physiology ; Synaptic Transmission ; Tetany
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 58
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-02-05
    Description: Traditionally, the interest of population and evolutionary biologists in infectious diseases has been almost exclusively in their role as agents of natural selection in higher organisms. Recently, this interest has expanded to include the genetic structure and evolution of microparasite populations, the mechanisms of pathogenesis and the immune response, and the population biology, ecology, and evolutionary consequences of medical and public health interventions. This article describes recent work in these areas, emphasizing the ways in which quantitative, population-biological approaches have been contributing to the understanding of infectious disease and the design and evaluation of interventions for their treatment and prevention.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levin, B R -- Lipsitch, M -- Bonhoeffer, S -- New York, N.Y. -- Science. 1999 Feb 5;283(5403):806-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, Emory University, 1510 Clifton Road, Atlanta, GA 30322, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9933155" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bacterial Physiological Phenomena ; *Biological Evolution ; Drug Resistance, Microbial ; Humans ; Infection/immunology/*microbiology ; Molecular Epidemiology ; Parasites/genetics/physiology ; Parasitic Diseases/immunology/*parasitology ; Population Dynamics ; Vaccination ; Virus Physiological Phenomena
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  • 59
    Publication Date: 1999-08-28
    Description: Class II transactivator (CIITA) is a global transcriptional coactivator of human leukocyte antigen-D (HLA-D) genes. CIITA contains motifs similar to guanosine triphosphate (GTP)-binding proteins. This report shows that CIITA binds GTP, and mutations in these motifs decrease its GTP-binding and transactivation activity. Substitution of these motifs with analogous sequences from Ras restores CIITA function. CIITA exhibits little GTPase activity, yet mutations in CIITA that confer GTPase activity reduce transcriptional activity. GTP binding by CIITA correlates with nuclear import. Thus, unlike other GTP-binding proteins, CIITA is involved in transcriptional activation that uses GTP binding to facilitate its own nuclear import.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harton, J A -- Cressman, D E -- Chin, K C -- Der, C J -- Ting, J P -- AI29564/AI/NIAID NIH HHS/ -- AI41751/AI/NIAID NIH HHS/ -- AI45580/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1999 Aug 27;285(5432):1402-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lineberger Comprehensive Cancer Center, University of North Carolina-Chapel Hill, Chapel Hill, NC 27599, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10464099" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Animals ; Binding Sites ; COS Cells ; Cell Line ; Cell Nucleus/*metabolism ; GTP-Binding Proteins/chemistry/genetics/*metabolism ; *Genes, MHC Class II ; Guanosine Triphosphate/*metabolism ; HLA-DR Antigens/genetics ; Humans ; Mutation ; *Nuclear Proteins ; Promoter Regions, Genetic ; Temperature ; Trans-Activators/chemistry/genetics/*metabolism ; Transcription Factors/metabolism ; *Transcriptional Activation
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 60
    Publication Date: 1999-09-25
    Description: Mass mortalities due to disease outbreaks have recently affected major taxa in the oceans. For closely monitored groups like corals and marine mammals, reports of the frequency of epidemics and the number of new diseases have increased recently. A dramatic global increase in the severity of coral bleaching in 1997-98 is coincident with high El Nino temperatures. Such climate-mediated, physiological stresses may compromise host resistance and increase frequency of opportunistic diseases. Where documented, new diseases typically have emerged through host or range shifts of known pathogens. Both climate and human activities may have also accelerated global transport of species, bringing together pathogens and previously unexposed host populations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Harvell, C D -- Kim, K -- Burkholder, J M -- Colwell, R R -- Epstein, P R -- Grimes, D J -- Hofmann, E E -- Lipp, E K -- Osterhaus, A D -- Overstreet, R M -- Porter, J W -- Smith, G W -- Vasta, G R -- 1PO1 ES09563/ES/NIEHS NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 3;285(5433):1505-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Ecology and Evolutionary Biology, Cornell University, Ithaca, NY 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10498537" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Aquaculture ; *Climate ; Cnidaria ; *Disease Outbreaks/*veterinary ; Humans ; Infection/epidemiology/*etiology/transmission/*veterinary ; *Marine Biology ; Oceans and Seas ; Water Pollution
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  • 61
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-08-24
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wojcik, J F -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):663.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10454918" target="_blank"〉PubMed〈/a〉
    Keywords: *Biological Evolution ; Humans ; *Religion and Science
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  • 62
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-08
    Description: Humans show considerable interindividual variation in susceptibility to weight gain in response to overeating. The physiological basis of this variation was investigated by measuring changes in energy storage and expenditure in 16 nonobese volunteers who were fed 1000 kilocalories per day in excess of weight-maintenance requirements for 8 weeks. Two-thirds of the increases in total daily energy expenditure was due to increased nonexercise activity thermogenesis (NEAT), which is associated with fidgeting, maintenance of posture, and other physical activities of daily life. Changes in NEAT accounted for the 10-fold differences in fat storage that occurred and directly predicted resistance to fat gain with overfeeding (correlation coefficient = 0.77, probability 〈 0.001). These results suggest that as humans overeat, activation of NEAT dissipates excess energy to preserve leanness and that failure to activate NEAT may result in ready fat gain.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Levine, J A -- Eberhardt, N L -- Jensen, M D -- DK45343/DK/NIDDK NIH HHS/ -- DK50456/DK/NIDDK NIH HHS/ -- M01 RR00535/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1999 Jan 8;283(5399):212-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Endocrine Research Unit, Mayo Clinic and Mayo Foundation, 200 First Street Southwest, Rochester, MN 55905, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9880251" target="_blank"〉PubMed〈/a〉
    Keywords: Activities of Daily Living ; *Adipose Tissue ; Adult ; Basal Metabolism ; Body Composition ; Calorimetry, Indirect ; *Energy Intake ; *Energy Metabolism ; Exercise ; Female ; Humans ; Hyperphagia/*physiopathology ; Male ; *Movement ; Posture ; *Weight Gain
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  • 63
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-16
    Description: Epigenetics is the study of heritable changes in gene expression that occur without a change in DNA sequence. Epigenetic phenomena have major economic and medical relevance, and several, such as imprinting and paramutation, violate Mendelian principles. Recent discoveries link the recognition of nucleic acid sequence homology to the targeting of DNA methylation, chromosome remodeling, and RNA turnover. Although epigenetic mechanisms help to protect cells from parasitic elements, this defense can complicate the genetic manipulation of plants and animals. Essential for normal development, epigenetic controls become misdirected in cancer cells and other human disease syndromes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolffe, A P -- Matzke, M A -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):481-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Embryology, National Institute of Child Heath and Human Development, NIH, Building 18T, Room 106, Bethesda, MD 20892-5431, USA. awlme@helix.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521337" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA Methylation ; Evolution, Molecular ; *Gene Expression Regulation ; Gene Expression Regulation, Developmental ; *Gene Silencing ; Genetic Diseases, Inborn/genetics ; Genome ; Humans ; Neoplasms/genetics ; RNA/genetics/metabolism ; Repetitive Sequences, Nucleic Acid
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  • 64
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉L'Heureux, N -- Germain, L -- Auger, F A -- New York, N.Y. -- Science. 1999 Jun 4;284(5420):1621-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10383338" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Biomedical Engineering ; *Blood Vessels/physiology/transplantation ; *Culture Techniques ; Dogs ; Endothelium, Vascular ; Graft Survival ; Humans ; Transplantation, Heterologous
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  • 65
    Publication Date: 1999-11-05
    Description: Glutamatergic neurotransmission is controlled by presynaptic metabotropic glutamate receptors (mGluRs). A subdomain in the intracellular carboxyl-terminal tail of group III mGluRs binds calmodulin and heterotrimeric guanosine triphosphate-binding protein (G protein) betagamma subunits in a mutually exclusive manner. Mutations interfering with calmodulin binding and calmodulin antagonists inhibit G protein-mediated modulation of ionic currents by mGluR 7. Calmodulin antagonists also prevent inhibition of excitatory neurotransmission via presynaptic mGluRs. These results reveal a novel mechanism of presynaptic modulation in which Ca(2+)-calmodulin is required to release G protein betagamma subunits from the C-tail of group III mGluRs in order to mediate glutamatergic autoinhibition.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Connor, V -- El Far, O -- Bofill-Cardona, E -- Nanoff, C -- Freissmuth, M -- Karschin, A -- Airas, J M -- Betz, H -- Boehm, S -- New York, N.Y. -- Science. 1999 Nov 5;286(5442):1180-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurochemistry, Max Planck Institute for Brain Research, Deutschordenstrasse 46, 60528 Frankfurt, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10550060" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Calcium/metabolism ; Calmodulin/antagonists & inhibitors/*metabolism ; Cells, Cultured ; Dimerization ; G Protein-Coupled Inwardly-Rectifying Potassium Channels ; GTP-Binding Proteins/*metabolism ; Glutamic Acid/*metabolism ; Hippocampus/cytology/metabolism ; Humans ; Mice ; Molecular Sequence Data ; Neurons/metabolism ; Potassium Channels/metabolism ; *Potassium Channels, Inwardly Rectifying ; Presynaptic Terminals/metabolism ; Propionates/pharmacology ; Rats ; Rats, Sprague-Dawley ; Receptors, Metabotropic Glutamate/antagonists & inhibitors/*metabolism ; Recombinant Fusion Proteins/metabolism ; Sesterterpenes ; Signal Transduction ; Swine ; *Synaptic Transmission ; Terpenes/pharmacology
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  • 66
    Publication Date: 1999-06-26
    Description: Regulation of circadian period in humans was thought to differ from that of other species, with the period of the activity rhythm reported to range from 13 to 65 hours (median 25.2 hours) and the period of the body temperature rhythm reported to average 25 hours in adulthood, and to shorten with age. However, those observations were based on studies of humans exposed to light levels sufficient to confound circadian period estimation. Precise estimation of the periods of the endogenous circadian rhythms of melatonin, core body temperature, and cortisol in healthy young and older individuals living in carefully controlled lighting conditions has now revealed that the intrinsic period of the human circadian pacemaker averages 24.18 hours in both age groups, with a tight distribution consistent with other species. These findings have important implications for understanding the pathophysiology of disrupted sleep in older people.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Czeisler, C A -- Duffy, J F -- Shanahan, T L -- Brown, E N -- Mitchell, J F -- Rimmer, D W -- Ronda, J M -- Silva, E J -- Allan, J S -- Emens, J S -- Dijk, D J -- Kronauer, R E -- MO1-RR02635/RR/NCRR NIH HHS/ -- P01-AG09975/AG/NIA NIH HHS/ -- R01-GM53559/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Jun 25;284(5423):2177-81.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Circadian, Neuroendocrine, and Sleep Disorders Section, Division of Endocrinology, Department of Medicine, Harvard Medical School, Brigham and Women's Hospital, 221 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10381883" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; Aging/*physiology ; Biological Clocks/genetics/*physiology ; Body Temperature ; Circadian Rhythm/genetics/*physiology ; Darkness ; Female ; Humans ; Hydrocortisone/blood ; Light ; Male ; Melatonin/blood ; Middle Aged ; Sleep
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  • 67
    Publication Date: 1999-02-26
    Description: Chlamydia infections are epidemiologically linked to human heart disease. A peptide from the murine heart muscle-specific alpha myosin heavy chain that has sequence homology to the 60-kilodalton cysteine-rich outer membrane proteins of Chlamydia pneumoniae, C. psittaci, and C. trachomatis was shown to induce autoimmune inflammatory heart disease in mice. Injection of the homologous Chlamydia peptides into mice also induced perivascular inflammation, fibrotic changes, and blood vessel occlusion in the heart, as well as triggering T and B cell reactivity to the homologous endogenous heart muscle-specific peptide. Chlamydia DNA functioned as an adjuvant in the triggering of peptide-induced inflammatory heart disease. Infection with C. trachomatis led to the production of autoantibodies to heart muscle-specific epitopes. Thus, Chlamydia-mediated heart disease is induced by antigenic mimicry of a heart muscle-specific protein.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bachmaier, K -- Neu, N -- de la Maza, L M -- Pal, S -- Hessel, A -- Penninger, J M -- New York, N.Y. -- Science. 1999 Feb 26;283(5406):1335-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Amgen Institute, Ontario Cancer Institute, Departments of Medical Biophysics and Immunology, University of Toronto, Toronto, Ontario M5G 2C1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10037605" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Amino Acid Sequence ; Animals ; Antigens, Bacterial/chemistry/immunology ; Autoantibodies/biosynthesis ; Autoimmune Diseases/immunology/*microbiology/pathology ; B-Lymphocytes/immunology ; Bacterial Outer Membrane Proteins/chemistry/*immunology ; CD4-Positive T-Lymphocytes/immunology ; Chlamydia/*immunology ; Chlamydia Infections/complications/*immunology ; Chlamydia trachomatis/immunology ; CpG Islands ; Humans ; Immunization ; Lymphocyte Activation ; Mice ; Mice, Inbred BALB C ; *Molecular Mimicry ; Molecular Sequence Data ; Myocarditis/immunology/*microbiology/pathology ; Myocardium/immunology/pathology ; Myosin Heavy Chains/chemistry/*immunology ; Oligodeoxyribonucleotides/immunology ; Sequence Homology, Amino Acid
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  • 68
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-07-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wolpoff, M H -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1774-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10391795" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; Hominidae/*classification/genetics ; Humans ; Phylogeny
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  • 69
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bagla, P -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):25, 27.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10532885" target="_blank"〉PubMed〈/a〉
    Keywords: *Academies and Institutes/economics ; *Brain ; Humans ; India ; International Cooperation ; *Research
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  • 70
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-07-31
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wong, V -- Goodenough, D A -- New York, N.Y. -- Science. 1999 Jul 2;285(5424):62.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10428705" target="_blank"〉PubMed〈/a〉
    Keywords: Calcium Channels/metabolism ; Cell Membrane/metabolism/ultrastructure ; Claudins ; Cloning, Molecular ; Humans ; Ion Channels ; Ion Transport ; Kidney Diseases/genetics/*metabolism ; Kidney Tubules/*metabolism/ultrastructure ; Lipid Bilayers/metabolism ; Magnesium/blood/*metabolism ; Magnesium Deficiency/genetics/*metabolism ; Membrane Proteins/genetics/*physiology ; Mutation ; Tight Junctions/*metabolism
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  • 71
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-04-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dan, Z -- Lei, X -- New York, N.Y. -- Science. 1999 Mar 26;283(5410):1990-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10206897" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes/*legislation & jurisprudence ; Aged ; Aged, 80 and over ; Aging/genetics ; *Blood Specimen Collection ; China ; Databases, Nucleic Acid ; Disclosure ; *Genetic Research ; Health Surveys ; Humans ; Informed Consent ; International Cooperation ; Internationality ; Life Style ; *Longevity/genetics ; Mass Media/*legislation & jurisprudence ; Research Support as Topic
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  • 72
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-04-02
    Description: A general problem in biology is how to incorporate information about evolutionary history and adaptation into taxonomy. The problem is exemplified in attempts to define our own genus, Homo. Here conventional criteria for allocating fossil species to Homo are reviewed and are found to be either inappropriate or inoperable. We present a revised definition, based on verifiable criteria, for Homo and conclude that two species, Homo habilis and Homo rudolfensis, do not belong in the genus. The earliest taxon to satisfy the criteria is Homo ergaster, or early African Homo erectus, which currently appears in the fossil record at about 1.9 million years ago.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wood, B -- Collard, M -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 1999 Apr 2;284(5411):65-71.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Anthropology, George Washington University, 2110 G Street NW, Washington, DC 20052, USA. bwood@gwu.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10102822" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptation, Physiological ; Animals ; Biological Evolution ; Body Constitution ; Brain/anatomy & histology ; *Fossils ; Hominidae/anatomy & histology/*classification ; Humans ; Jaw/anatomy & histology ; Locomotion ; Phylogeny ; Terminology as Topic
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  • 73
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-02-05
    Description: Costimulation of both the CD3 and CD28 receptors is essential for T cell activation. Induction of adenosine 3',5'-monophosphate (cAMP)-specific phosphodiesterase-7 (PDE7) was found to be a consequence of such costimulation. Increased PDE7 in T cells correlated with decreased cAMP, increased interleukin-2 expression, and increased proliferation. Selectively reducing PDE7 expression with a PDE7 antisense oligonucleotide inhibited T cell proliferation; inhibition was reversed by blocking the cAMP signaling pathways that operate through cAMP-dependent protein kinase (PKA). Thus, PDE7 induction and consequent suppression of PKA activity is required for T cell activation, and inhibition of PDE7 could be an approach to treating T cell-dependent disorders.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, L -- Yee, C -- Beavo, J A -- DK21723/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 1999 Feb 5;283(5403):848-51.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pharmacology and Molecular and Cellular Biology Program, Box 357280, University of Washington School of Medicine, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9933169" target="_blank"〉PubMed〈/a〉
    Keywords: 3',5'-Cyclic-AMP Phosphodiesterases/*biosynthesis/genetics/metabolism ; Antibodies ; Antigens, CD28/immunology/*physiology ; Antigens, CD3/immunology/*physiology ; CD4-Positive T-Lymphocytes/enzymology/immunology ; Cells, Cultured ; Cyclic AMP/metabolism ; Cyclic AMP-Dependent Protein Kinases/metabolism ; Cyclic Nucleotide Phosphodiesterases, Type 7 ; Enzyme Induction ; Humans ; Interleukin-2/biosynthesis ; Isoenzymes/*biosynthesis/genetics/metabolism ; *Lymphocyte Activation ; Oligonucleotides, Antisense/pharmacology ; RNA, Messenger/genetics/metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; T-Lymphocytes/*enzymology/*immunology/metabolism ; Tumor Cells, Cultured
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  • 74
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Daniel, T M -- New York, N.Y. -- Science. 1999 Oct 8;286(5438):239.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577189" target="_blank"〉PubMed〈/a〉
    Keywords: Bronchiectasis/history ; Depressive Disorder/*history/pathology ; *Famous Persons ; Fingers/*pathology ; History, 19th Century ; Humans ; Literature, Modern/*history ; Male ; Medicine in Art ; Paintings ; Tuberculosis/*history/pathology
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  • 75
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hawkins, M M -- Barratt, C L -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):51-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10532889" target="_blank"〉PubMed〈/a〉
    Keywords: Child ; Congenital Abnormalities/etiology ; Developmental Disabilities/etiology ; Female ; Fertilization in Vitro/*adverse effects ; Great Britain ; Humans ; Male ; Neoplasms/etiology ; Pregnancy ; Pregnancy Outcome ; Registries ; Risk Factors
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 76
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-04-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bagla, P -- New York, N.Y. -- Science. 1999 Mar 12;283(5408):1614-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10189310" target="_blank"〉PubMed〈/a〉
    Keywords: Academies and Institutes ; *Economics, Pharmaceutical ; *Ethnic Groups ; Humans ; India ; Medicine, Ayurvedic ; Plant Extracts/*economics ; *Plants, Medicinal
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  • 77
    Publication Date: 1999-07-31
    Description: Many immune receptors are composed of separate ligand-binding and signal-transducing subunits. In natural killer (NK) and T cells, DAP10 was identified as a cell surface adaptor protein in an activating receptor complex with NKG2D, a receptor for the stress-inducible and tumor-associated major histocompatibility complex molecule MICA. Within the DAP10 cytoplasmic domain, an Src homology 2 (SH2) domain-binding site was capable of recruiting the p85 subunit of the phosphatidylinositol 3-kinase (PI 3-kinase), providing for NKG2D-dependent signal transduction. Thus, NKG2D-DAP10 receptor complexes may activate NK and T cell responses against MICA-bearing tumors.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, J -- Song, Y -- Bakker, A B -- Bauer, S -- Spies, T -- Lanier, L L -- Phillips, J H -- AI30581/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 30;285(5428):730-2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉DNAX Research Institute, 901 California Avenue, Palo Alto, CA 94304, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10426994" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Cell Line ; Cytotoxicity, Immunologic ; Humans ; Killer Cells, Natural/*immunology/metabolism ; Ligands ; *Lymphocyte Activation ; Membrane Proteins/chemistry/genetics/*metabolism ; Mice ; Molecular Sequence Data ; NK Cell Lectin-Like Receptor Subfamily K ; Neoplasms/immunology ; Phosphatidylinositol 3-Kinases/metabolism ; Phosphorylation ; Phosphotyrosine/metabolism ; Receptors, Immunologic/chemistry/genetics/*metabolism ; Receptors, Natural Killer Cell ; Signal Transduction ; T-Lymphocytes/*immunology/metabolism ; Tumor Cells, Cultured ; src Homology Domains
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 78
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bagla, P -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):309.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9925483" target="_blank"〉PubMed〈/a〉
    Keywords: Bioethics ; *Biotechnology/economics/legislation & jurisprudence ; *Genetics, Medical/economics/legislation & jurisprudence ; *Genome ; Genome, Human ; Genome, Plant ; Humans ; India ; *Molecular Biology/economics/legislation & jurisprudence ; Patents as Topic ; Research Support as Topic
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 79
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lieberman, P -- New York, N.Y. -- Science. 1999 Jan 8;283(5399):175.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9925475" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Fossils ; Hominidae/*anatomy & histology/physiology ; Humans ; Hyoid Bone/*anatomy & histology ; *Speech ; Tongue/*anatomy & histology
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  • 80
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-04-03
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Davis, D L -- Garry, R F -- New York, N.Y. -- Science. 1999 Mar 12;283(5408):1644.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10189316" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Breast Implants/*adverse effects ; Female ; Humans ; Silicone Gels/*adverse effects
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  • 81
    Publication Date: 1999-06-12
    Description: Interferons (IFNs) are the most important cytokines in antiviral immune responses. "Natural IFN-producing cells" (IPCs) in human blood express CD4 and major histocompatibility complex class II proteins, but have not been isolated and further characterized because of their rarity, rapid apoptosis, and lack of lineage markers. Purified IPCs are here shown to be the CD4(+)CD11c- type 2 dendritic cell precursors (pDC2s), which produce 200 to 1000 times more IFN than other blood cells after microbial challenge. pDC2s are thus an effector cell type of the immune system, critical for antiviral and antitumor immune responses.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Siegal, F P -- Kadowaki, N -- Shodell, M -- Fitzgerald-Bocarsly, P A -- Shah, K -- Ho, S -- Antonenko, S -- Liu, Y J -- New York, N.Y. -- Science. 1999 Jun 11;284(5421):1835-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Saint Vincents Hospital and Medical Center, New York, NY 10011, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10364556" target="_blank"〉PubMed〈/a〉
    Keywords: CD40 Ligand ; Cell Lineage ; Cell Separation ; Cells, Cultured ; Dendritic Cells/cytology/*immunology/ultrastructure ; Humans ; Interferon Type I/*biosynthesis ; Interferon-alpha/*biosynthesis/genetics ; Interferon-beta/biosynthesis/genetics ; Interleukin-3/pharmacology ; Leukocytes, Mononuclear/immunology ; Membrane Glycoproteins/pharmacology ; Organelles/ultrastructure ; RNA, Messenger/genetics/metabolism ; Simplexvirus/immunology ; Stem Cells/cytology/immunology
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  • 82
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lietman, T -- Blower, S -- New York, N.Y. -- Science. 1999 Nov 12;286(5443):1300-1; author reply 1301.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610535" target="_blank"〉PubMed〈/a〉
    Keywords: Antibiotics, Antitubercular/*therapeutic use ; BCG Vaccine/*immunology ; Humans ; Immunization Programs ; Tuberculosis/*drug therapy/*prevention & control
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  • 83
    Publication Date: 1999-09-18
    Description: Antithrombin, a member of the serpin family, functions as an inhibitor of thrombin and other enzymes. Cleavage of the carboxyl-terminal loop of antithrombin induces a conformational change in the molecule. Here it is shown that the cleaved conformation of antithrombin has potent antiangiogenic and antitumor activity in mouse models. The latent form of intact antithrombin, which is similar in conformation to the cleaved molecule, also inhibited angiogenesis and tumor growth. These data provide further evidence that the clotting and fibrinolytic pathways are directly involved in the regulation of angiogenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Reilly, M S -- Pirie-Shepherd, S -- Lane, W S -- Folkman, J -- P01-CA45548/CA/NCI NIH HHS/ -- R01-CA64481/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1926-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Surgery, Children's Hospital, Departments of Surgery and Cellular Biology, Harvard Microchemistry Facility, 16 Divinity Avenue, Cambridge, MA 02138, USA. oreilly@hub.tch.harvard.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10489375" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Agents/chemistry/isolation & purification/metabolism/*pharmacology ; Antithrombins/chemistry/isolation & purification/metabolism/*pharmacology ; Carcinoma, Small Cell/blood supply/drug therapy ; Cell Line ; Culture Media, Conditioned ; Drug Screening Assays, Antitumor ; Humans ; Lung Neoplasms/blood supply/drug therapy ; Mice ; Mice, SCID ; Neoplasm Transplantation ; Neovascularization, Pathologic/*drug therapy ; Peptide Fragments/chemistry/metabolism/pharmacology ; Protein Conformation ; Tumor Cells, Cultured
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  • 84
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-08-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Orr-Weaver, T L -- New York, N.Y. -- Science. 1999 Jul 16;285(5426):344-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute and Massachusetts Institute of Technology, Cambridge, MA 02142, USA. weaver@wi.mit.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10438298" target="_blank"〉PubMed〈/a〉
    Keywords: *Anaphase ; Anaphase-Promoting Complex-Cyclosome ; Animals ; Cell Cycle Proteins/*metabolism ; Cell Transformation, Neoplastic ; Chromatids/*physiology ; Chromosomal Proteins, Non-Histone ; *Endopeptidases ; Fungal Proteins ; Humans ; Ligases/metabolism ; Mitosis ; Neoplasm Proteins/*metabolism ; Nuclear Proteins/metabolism ; Oncogene Proteins/*metabolism ; Phosphoproteins ; Prophase ; Saccharomyces cerevisiae Proteins ; Securin ; Separase ; *Ubiquitin-Protein Ligase Complexes ; Ubiquitin-Protein Ligases ; Yeasts/cytology/metabolism
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  • 85
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-02-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, M -- New York, N.Y. -- Science. 1999 Jan 29;283(5402):617, 619.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9988653" target="_blank"〉PubMed〈/a〉
    Keywords: Bioethics ; Cell Division ; *Cloning, Organism/legislation & jurisprudence ; Embryo Research ; *Embryo, Mammalian/cytology ; Ethical Review ; Government Regulation ; Humans ; Korea ; Nuclear Transfer Techniques ; Public Policy
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  • 86
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-08-07
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1999 Jul 16;285(5426):357-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10438301" target="_blank"〉PubMed〈/a〉
    Keywords: Abatacept ; Antigens, CD ; Antigens, Differentiation/metabolism/*pharmacology ; Bone Marrow Transplantation/*immunology ; CTLA-4 Antigen ; Graft vs Host Disease/immunology/*prevention & control ; Humans ; *Immune Tolerance ; *Immunoconjugates ; Immunosuppressive Agents/metabolism/*pharmacology ; Leukocytes, Mononuclear/immunology ; Lymphocyte Activation ; T-Lymphocytes/*immunology/metabolism ; Transplantation Conditioning
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  • 87
    Publication Date: 1999-09-18
    Description: The bacterial pathogen Yersinia uses a type III secretion system to inject several virulence factors into target cells. One of the Yersinia virulence factors, YopJ, was shown to bind directly to the superfamily of MAPK (mitogen-activated protein kinase) kinases (MKKs) blocking both phosphorylation and subsequent activation of the MKKs. These results explain the diverse activities of YopJ in inhibiting the extracellular signal-regulated kinase, c-Jun amino-terminal kinase, p38, and nuclear factor kappa B signaling pathways, preventing cytokine synthesis and promoting apoptosis. YopJ-related proteins that are found in a number of bacterial pathogens of animals and plants may function to block MKKs so that host signaling responses can be modulated upon infection.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Orth, K -- Palmer, L E -- Bao, Z Q -- Stewart, S -- Rudolph, A E -- Bliska, J B -- Dixon, J E -- 18024/PHS HHS/ -- AI35175/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1920-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109-0606, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10489373" target="_blank"〉PubMed〈/a〉
    Keywords: Bacterial Proteins/*physiology ; Calcium-Calmodulin-Dependent Protein Kinases/*antagonists & inhibitors ; Cell Line ; Enzyme Activation ; Enzyme Inhibitors/*pharmacology ; HeLa Cells ; Humans ; *MAP Kinase Kinase Kinase 1 ; NF-kappa B/metabolism ; Phosphorylation ; Protein Binding ; Protein-Serine-Threonine Kinases/genetics/metabolism ; Recombinant Fusion Proteins/genetics/metabolism ; Transfection ; Virulence ; Yersinia pseudotuberculosis/genetics/metabolism/pathogenicity/*physiology
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  • 88
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-07-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1999 Jun 18;284(5422):1952.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10400538" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Bioreactors ; Cell Culture Techniques ; Dogs ; *Hemofiltration ; Humans ; Kidney Failure, Chronic/metabolism/*therapy ; Kidney Tubules, Proximal/*cytology/*metabolism ; Kidneys, Artificial ; Swine
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  • 89
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baker, M -- New York, N.Y. -- Science. 1999 Jan 1;283(5398):16-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9917255" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Bioethics ; *Cloning, Organism ; Embryo Research ; Female ; Government Regulation ; Humans ; Korea ; Nuclear Transfer Techniques ; Research
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  • 90
    Publication Date: 1999-04-24
    Description: Primary effusion lymphoma (PEL) cells harbor Kaposi's sarcoma-associated herpesvirus (KSHV) episomes and express a KSHV-encoded latency-associated nuclear antigen (LANA). In PEL cells, LANA and KSHV DNA colocalized in dots in interphase nuclei and along mitotic chromosomes. In the absence of KSHV DNA, LANA was diffusely distributed in the nucleus or on mitotic chromosomes. In lymphoblasts, LANA was necessary and sufficient for the persistence of episomes containing a specific KSHV DNA fragment. Furthermore, LANA colocalized with the artificial KSHV DNA episomes in nuclei and along mitotic chromosomes. These results support a model in which LANA tethers KSHV DNA to chromosomes during mitosis to enable the efficient segregation of KSHV episomes to progeny cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ballestas, M E -- Chatis, P A -- Kaye, K M -- CA67380-04/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1999 Apr 23;284(5414):641-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Channing Laboratory, Brigham and Women's Hospital, Harvard Medical School, 181 Longwood Avenue, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10213686" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, Viral/analysis/genetics/metabolism ; Cell Nucleus/chemistry ; Chromosomes/chemistry/*metabolism ; Cosmids ; DNA, Viral/analysis/genetics/*metabolism ; Herpesvirus 8, Human/*genetics/physiology ; Humans ; Interphase ; Lymphocytes/chemistry ; Microscopy, Confocal ; *Mitosis ; Nuclear Proteins/analysis/genetics/*metabolism ; *Plasmids ; Transfection ; Tumor Cells, Cultured
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  • 91
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-16
    Description: New tools of genomic analysis shed light on historical puzzles. Migrations of ancient peoples, differences in migration patterns of males and females, historical demography of cultures with ancient roots, and patterns of human genetic diversity are increasingly the focus of integrated analysis by historians, anthropologists, and geneticists.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owens, K -- King, M C -- New York, N.Y. -- Science. 1999 Oct 15;286(5439):451-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Genetics and Medicine, Box 357720, University of Washington, Seattle, WA 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10521333" target="_blank"〉PubMed〈/a〉
    Keywords: *Anthropology ; Biological Evolution ; Continental Population Groups/genetics ; Culture ; Emigration and Immigration ; Ethnic Groups/genetics ; Female ; Genetic Variation ; *Genetics, Population ; *Genome, Human ; History, Ancient ; Humans ; Jews/genetics ; Male
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  • 92
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-12-03
    Description: Faithful maintenance of the genome is crucial to the individual and to species. DNA damage arises from both endogenous sources such as water and oxygen and exogenous sources such as sunlight and tobacco smoke. In human cells, base alterations are generally removed by excision repair pathways that counteract the mutagenic effects of DNA lesions. This serves to maintain the integrity of the genetic information, although not all of the pathways are absolutely error-free. In some cases, DNA damage is not repaired but is instead bypassed by specialized DNA polymerases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lindahl, T -- Wood, R D -- New York, N.Y. -- Science. 1999 Dec 3;286(5446):1897-905.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Imperial Cancer Research Fund, Clare Hall Laboratories, South Mimms, Herts, EN6 3LD, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10583946" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; DNA/*metabolism/radiation effects ; DNA Adducts/metabolism ; *DNA Damage ; DNA Glycosylases ; *DNA Repair ; DNA-Binding Proteins/metabolism ; DNA-Directed DNA Polymerase/metabolism ; Humans ; Mutagens ; N-Glycosyl Hydrolases/chemistry/metabolism ; Neoplasms/genetics/metabolism ; Poly(ADP-ribose) Polymerases/metabolism ; Ultraviolet Rays
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 93
    Publication Date: 1999-07-10
    Description: In the absence of disease, the vasculature of the mammalian eye is quiescent, in part because of the action of angiogenic inhibitors that prevent vessels from invading the cornea and vitreous. Here, an inhibitor responsible for the avascularity of these ocular compartments is identified as pigment epithelium-derived factor (PEDF), a protein previously shown to have neurotrophic activity. The amount of inhibitory PEDF produced by retinal cells was positively correlated with oxygen concentrations, suggesting that its loss plays a permissive role in ischemia-driven retinal neovascularization. These results suggest that PEDF may be of therapeutic use, especially in retinopathies where pathological neovascularization compromises vision and leads to blindness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dawson, D W -- Volpert, O V -- Gillis, P -- Crawford, S E -- Xu, H -- Benedict, W -- Bouck, N P -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):245-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology-Immunology, Department of Pathology, Robert H. Lurie Comprehensive Cancer Center, Northwestern University Medical School, Chicago, IL 60611, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398599" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Animals, Newborn ; Antibodies/immunology ; Cattle ; Cells, Cultured ; Chemotaxis/drug effects ; Culture Media, Conditioned ; Endothelial Growth Factors/metabolism ; Endothelium, Vascular/cytology/drug effects/physiology ; Eye/blood supply ; *Eye Proteins ; Humans ; Lymphokines/metabolism ; Mice ; Neovascularization, Pathologic/*drug therapy/metabolism/pathology ; Neovascularization, Physiologic/*drug effects ; *Nerve Growth Factors ; Oxygen/physiology ; Proteins/genetics/immunology/*pharmacology/*physiology ; RNA, Messenger/genetics/metabolism ; Rats ; Retina/*metabolism/pathology ; Retinal Neovascularization/*drug therapy ; Retinal Vessels/growth & development ; Serpins/genetics/immunology/*pharmacology/*physiology ; Tumor Cells, Cultured ; Vascular Endothelial Growth Factor A ; Vascular Endothelial Growth Factors
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  • 94
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-11-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helmuth, L -- New York, N.Y. -- Science. 1999 Oct 29;286(5441):886-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10577234" target="_blank"〉PubMed〈/a〉
    Keywords: *Brain Tissue Transplantation ; Controlled Clinical Trials as Topic ; Dopamine/metabolism ; Double-Blind Method ; *Fetal Tissue Transplantation ; Humans ; Parkinson Disease/*therapy ; Putamen/cytology
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  • 95
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-10-09
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Silberberg, S D -- Magleby, K L -- New York, N.Y. -- Science. 1999 Sep 17;285(5435):1859-60.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Life Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel. silber@bgumail.bgu.ac.il〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10515790" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Blood Pressure/drug effects/*physiology ; Estradiol/*metabolism/pharmacology ; Female ; Humans ; Large-Conductance Calcium-Activated Potassium Channels ; Longevity/physiology ; Male ; Muscle Contraction ; Muscle, Smooth, Vascular/drug effects/metabolism ; Potassium Channels/*metabolism ; *Potassium Channels, Calcium-Activated ; Recombinant Proteins/metabolism ; Sex Characteristics ; Xenopus
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  • 96
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-12-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balter, M -- New York, N.Y. -- Science. 1999 Nov 19;286(5444):1470-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10610544" target="_blank"〉PubMed〈/a〉
    Keywords: AIDS Vaccines/*immunology/therapeutic use ; Anti-HIV Agents/therapeutic use ; Controlled Clinical Trials as Topic ; HIV/*immunology/physiology ; HIV Infections/drug therapy/*immunology/*therapy/virology ; Humans ; T-Lymphocytes, Cytotoxic/*immunology ; T-Lymphocytes, Helper-Inducer/*immunology ; Viral Load
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 97
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-09-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Helmuth, L -- New York, N.Y. -- Science. 1999 Aug 27;285(5432):1339, 1341.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10490405" target="_blank"〉PubMed〈/a〉
    Keywords: Amnesia, Retrograde/physiopathology/psychology ; Awareness ; Hippocampus/*physiology ; Humans ; *Memory ; Unconscious (Psychology)
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  • 98
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-03-05
    Description: The distribution of mitochondria to daughter cells during cell division is an essential feature of cell proliferation. Until recently, it was commonly believed that inheritance of mitochondria and other organelles was a passive process, a consequence of their random diffusion throughout the cytoplasm. A growing recognition of the reticular morphology of mitochondria in many living cells, the association of mitochondria with the cytoskeleton, and the coordinated movements of mitochondria during cellular division and differentiation has illuminated the necessity for a cellular machinery that mediates mitochondrial behavior. Characterization of the underlying molecular components of this machinery is providing insight into mechanisms regulating mitochondrial morphology and distribution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yaffe, M P -- GM44614/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Mar 5;283(5407):1493-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, University of California, San Diego, La Jolla, CA 92093-0347, USA. myaffe@ucsd.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10066164" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cell Division ; Cytoskeletal Proteins/genetics/physiology ; Cytoskeleton/physiology ; Dynamins ; GTP Phosphohydrolases/physiology ; Genes ; Humans ; Mitochondria/*genetics/*physiology/ultrastructure ; Movement ; Mutation ; Saccharomyces cerevisiae/genetics/physiology/ultrastructure
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 99
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-01-30
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sikorski, R -- Peters, R -- New York, N.Y. -- Science. 1999 Jan 15;283(5400):349.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9925497" target="_blank"〉PubMed〈/a〉
    Keywords: Base Pairing ; *Genes, APC ; Humans ; Mass Spectrometry ; Oligodeoxyribonucleotides/*chemistry ; Sequence Analysis, DNA/*methods
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  • 100
    Publication Date: 1999-07-20
    Description: All known Rift Valley fever virus outbreaks in East Africa from 1950 to May 1998, and probably earlier, followed periods of abnormally high rainfall. Analysis of this record and Pacific and Indian Ocean sea surface temperature anomalies, coupled with satellite normalized difference vegetation index data, shows that prediction of Rift Valley fever outbreaks may be made up to 5 months in advance of outbreaks in East Africa. Concurrent near-real-time monitoring with satellite normalized difference vegetation data may identify actual affected areas.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Linthicum, K J -- Anyamba, A -- Tucker, C J -- Kelley, P W -- Myers, M F -- Peters, C J -- New York, N.Y. -- Science. 1999 Jul 16;285(5426):397-400.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Defense, Global Emerging Infections System, Division of Preventive Medicine, Walter Reed Army Institute of Research, Washington, DC 20307-5100, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10411500" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Climate ; *Disease Outbreaks ; *Forecasting ; Humans ; Kenya/epidemiology ; Oceans and Seas ; Pacific Ocean ; Rain ; Rift Valley Fever/*epidemiology/prevention & control/veterinary ; Temperature ; *Weather
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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