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  • 1
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    Oxygen loss from seagrass roots coincides with colonisation of sulphide-oxidising cable bacteria and reduces sulphide stress (2018)
    Springer Nature
    Details
    Publication Date: 2018
    Print ISSN: 1751-7362
    Electronic ISSN: 1751-7370
    Topics: Biology
    Published by Springer Nature on behalf of The International Society for Microbial Ecology (ISME).
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  • 2
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    Review of thermal processing of biomass and waste in molten salts for production of renewable fuels and chemicals (2012)
    Oxford University Press
    Details
    Publication Date: 2012-11-09
    Description: Renewable energy has gained great attention and interest in recent years due to growing energy consumption and greater environmental concerns. Biomass is regarded as a promising candidate for replacing fossil-derived products, through either thermal, biological, or physical processes. This review focuses on thermal processing of biomass in molten salts for production of renewable fuels and chemicals, concepts based on dispersion of biomass or waste particles in a molten salt bath. Inorganic salts have very high heat capacities and good thermal stability at high temperatures. Some molten salts have catalytic properties, and in thermal processing of biomass, the product yields and compound compositions of products can be adjusted by varying compositions and amount of molten salts. In addition, molten salts will retain noxious contaminants, and it is thus possible to use difficult convertible- and/or contaminated biomass as feedstock.
    Print ISSN: 1748-1317
    Electronic ISSN: 1748-1325
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Oxford University Press
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  • 3
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    Public Acceptance of Disturbance-Based Forest Management: Factors Influencing Support (2012)
    International Scholarly Research Network (ISRN)
    Details
    Publication Date: 2012-10-17
    Description: Growing emphasis on ecosystem and landscape-level forest management across North America has spurred an examination of alternative management strategies which focus on emulating dynamic natural disturbance processes, particularly those associated with forest fire regimes. This topic is the cornerstone of research in the Blue River Landscape Study (BRLS) on the Willamette National Forest in the McKenzie River watershed of western Oregon. As scientists and managers work to unravel the ecological and economic implications of disturbance-based forest management, they must also consider public acceptance for such an approach. In this study, citizen opinions from the local attentive public in McKenzie River watershed communities are examined. Results suggest the attentive public has moderate to low levels of knowledge about landscape-level disturbance processes and terms. Further, public confidence in agencies and the information they provide appears to be low, though respondents indicated a somewhat higher level of trust for local agency personnel than agencies as institutions. Overall, respondents display cautious support of disturbance-based management (DBM), but many are still undecided. Findings also demonstrate support may be improved through transparent and inclusive decision-making processes that demonstrate the use of sound science in project planning, frank disclosure of risks and uncertainties, and clear management objectives.
    Electronic ISSN: 2090-892X
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by International Scholarly Research Network (ISRN)
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  • 4
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    Food supply confers calcifiers resistance to ocean acidification (2016)
    Springer Nature
    Details
    Publication Date: 2016-01-19
    Description: Food supply confers calcifiers resistance to ocean acidification Scientific Reports, Published online: 18 January 2016; doi:10.1038/srep19374
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 5
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    Public Acceptance of Disturbance-Based Forest Management: Factors Influencing Support (2012)
    International Scholarly Research Network (ISRN)
    Details
    Publication Date: 2012-06-21
    Description: Growing emphasis on ecosystem and landscape-level forest management across North America has spurred an examination of alternative management strategies which focus on emulating dynamic natural disturbance processes, particularly those associated with forest fire regimes. This topic is the cornerstone of research in the Blue River Landscape Study (BRLS) on the Willamette National Forest in the McKenzie River watershed of western Oregon. As scientists and managers work to unravel the ecological and economic implications of disturbance-based forest management, they must also consider public acceptance for such an approach. In this study, citizen opinions from the local attentive public in McKenzie River watershed communities are examined. Results suggest the attentive public has moderate to low levels of knowledge about landscape-level disturbance processes and terms. Further, public confidence in agencies and the information they provide appears to be low, though respondents indicated a somewhat higher level of trust for local agency personnel than agencies as institutions. Overall, respondents display cautious support of disturbance-based management (DBM), but many are still undecided. Findings also demonstrate support may be improved through transparent and inclusive decision-making processes that demonstrate the use of sound science in project planning, frank disclosure of risks and uncertainties, and clear management objectives.
    Electronic ISSN: 2090-892X
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by International Scholarly Research Network (ISRN)
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  • 6
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    Unsuspected pathway of the allosteric transition in hemoglobin [Biophysics and Computational Biology] (2011)
    National Academy of Sciences
    Details
    Publication Date: 2011-04-06
    Description: Large conformational transitions play an essential role in the function of many proteins, but experiments do not provide the atomic details of the path followed in going from one end structure to the other. For the hemoglobin tetramer, the transition path between the unliganded (T) and tetraoxygenated (R) structures is not known, which limits our understanding of the cooperative mechanism in this classic allosteric system, where both tertiary and quaternary changes are involved. The conjugate peak refinement algorithm is used to compute an unbiased minimum energy path at atomic detail between the two end states. Although the results confirm some of the proposals of Perutz [Perutz MF (1970) Stereochemistry of cooperative effects in haemoglobin. Nature 228:726–734], the subunit motions do not follow the textbook description of a simple rotation of one αβ-dimer relative to the other. Instead, the path consists of two sequential quaternary rotations, each involving different subdomains and axes. The quaternary transitions are preceded and followed by phases of tertiary structural changes. The results explain the recent photodissociation measurements, which suggest that the quaternary transition has a fast (2 μs) as well as a slow (20 μs) component and provide a testable model for single molecule FRET experiments.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 7
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    Determining kinematic order and relative age of faulting via flexural‐kinematic restoration: A case study in far western Nepal (2019)
    Wiley
    Details
    Publication Date: 2019
    Description: Deformation, isostasy and erosion for one 8 km increment of thrust motion (479 km total). Top panel, fault displacement and isostatic loading following 8 km of displacement. Middle panel, new estimated topography and erosion. Bottom panel, estimated cross section geometry and topography following erosion and deposition. Abstract Forward modeled, balanced cross sections that account for the flexural response to thrust loading and erosional unloading can verify and refine the kinematic sequence of deformation in fold‐thrust belts as well as help assess the validity of a balanced cross section. Results from flexural‐kinematic reconstructions that indicate either the cross section, the kinematic order or both are invalid include: (a) a predicted final topography that is dramatically different from the actual topography; (b) large normal fault or thrust fault bounded synorogenic basins that are not present in the mapped geology; and/or (c) an exhumation history that is not consistent with provenance records in the basin or measured thermochronometers. Where detailed measured foreland basin sections exist, flexural‐kinematic modeling of fold‐thrust belt deformation, including out‐of‐sequence (OOS) faults can predict a foreland basin evolution that can be compared to measured data. The modeling process creates a “pseudostratigraphy” in the modeled foreland. The pseudostratigraphy and predicted provenance of each modeled stratigraphic increment can be directly compared to measured stratigraphic sections. We present a case study using two cross sections through the Himalaya of far western Nepal (Api and Simikot) to assess the validity of the section geometries and the resulting kinematic histories, displacement rates, flexural wave response and predicted provenance for both sections. Insights from combining the flexural‐kinematic models with existing stratigraphic data include: (a) Changing the order of proposed OOS and normal faults to earlier in the evolution of the fold‐thrust belt was necessary to reproduce the foreland provenance data. We argue that OOS thrust and normal faults in the Api section occurred between 11 and 4 Ma. (b) Published shortening estimates for the Simikot cross section are too high (〉50 km), resulting in unrealistic shortening rates up to 80 mm/yr between 25 and 20 Ma. (c) Flexural forward models with and without an additional sediment loading modeling step indicate that while sediment loading does not have a measurable effect on the magnitude and location of erosion within the fold‐thrust belt, it does have a small effect on accumulation rates and thus the predicted age of stratigraphic boundaries when compared to measured stratigraphic thicknesses and age. Thickness difference range from 0.2 to 0.5 km and can result in predicted age differences of ca. 1 Ma. Accounting for both flexural isostacy and erosion can eliminate unviable kinematic sequences and when combined with provenance data from measured stratigraphic sections, can provide insight into the order, age and rate of deformation.
    Print ISSN: 0950-091X
    Electronic ISSN: 1365-2117
    Topics: Geosciences
    Published by Wiley
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  • 8
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    Climatically driven biogeographic provinces of Late Triassic tropical Pangea [Evolution] (2011)
    National Academy of Sciences
    Details
    Publication Date: 2011-06-01
    Description: Although continents were coalesced into the single landmass Pangea, Late Triassic terrestrial tetrapod assemblages are surprisingly provincial. In eastern North America, we show that assemblages dominated by traversodont cynodonts are restricted to a humid 6° equatorial swath that persisted for over 20 million years characterized by “semiprecessional” (approximately 10,000-y) climatic fluctuations reflected in stable carbon isotopes and sedimentary facies in lacustrine strata. More arid regions from 5–20°N preserve procolophonid-dominated faunal assemblages associated with a much stronger expression of approximately 20,000-y climatic cycles. In the absence of geographic barriers, we hypothesize that these variations in the climatic expression of astronomical forcing produced latitudinal climatic zones that sorted terrestrial vertebrate taxa, perhaps by excretory physiology, into distinct biogeographic provinces tracking latitude, not geographic position, as the proto-North American plate translated northward. Although the early Mesozoic is usually assumed to be characterized by globally distributed land animal communities due to of a lack of geographic barriers, strong provinciality was actually the norm, and nearly global communities were present only after times of massive ecological disruptions.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 9
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    Human chromosome 19 and related regions in mouse: conservative and lineage-specific evolution (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-07-07
    Description: To illuminate the function and evolutionary history of both genomes, we sequenced mouse DNA related to human chromosome 19. Comparative sequence alignments yielded confirmatory evidence for hypothetical genes and identified exons, regulatory elements, and candidate genes that were missed by other predictive methods. Chromosome-wide comparisons revealed a difference between single-copy HSA19 genes, which are overwhelmingly conserved in mouse, and genes residing in tandem familial clusters, which differ extensively in number, coding capacity, and organization between the two species. Finally, we sequenced breakpoints of all 15 evolutionary rearrangements, providing a view of the forces that drive chromosome evolution in mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dehal, P -- Predki, P -- Olsen, A S -- Kobayashi, A -- Folta, P -- Lucas, S -- Land, M -- Terry, A -- Ecale Zhou, C L -- Rash, S -- Zhang, Q -- Gordon, L -- Kim, J -- Elkin, C -- Pollard, M J -- Richardson, P -- Rokhsar, D -- Uberbacher, E -- Hawkins, T -- Branscomb, E -- Stubbs, L -- New York, N.Y. -- Science. 2001 Jul 6;293(5527):104-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉DOE Joint Genome Institute, Walnut Creek, CA 94598, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11441184" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Breakage/genetics ; Chromosomes, Human, Pair 19/*genetics ; Conserved Sequence/*genetics ; Contig Mapping ; DNA, Satellite/genetics ; *Evolution, Molecular ; Exons/genetics ; Expressed Sequence Tags ; Gene Dosage ; Gene Order/genetics ; Genetic Linkage/genetics ; Genome ; Humans ; Long Interspersed Nucleotide Elements/genetics ; Mice ; Multigene Family/genetics ; Open Reading Frames/genetics ; Phylogeny ; Sequence Alignment ; Sequence Analysis, DNA ; Short Interspersed Nucleotide Elements/genetics ; Terminal Repeat Sequences/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    BLyS: member of the tumor necrosis factor family and B lymphocyte stimulator (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-10
    Description: The tumor necrosis factor (TNF) superfamily of cytokines includes both soluble and membrane-bound proteins that regulate immune responses. A member of the human TNF family, BLyS (B lymphocyte stimulator), was identified that induced B cell proliferation and immunoglobulin secretion. BLyS expression on human monocytes could be up-regulated by interferon-gamma. Soluble BLyS functioned as a potent B cell growth factor in costimulation assays. Administration of soluble recombinant BLyS to mice disrupted splenic B and T cell zones and resulted in elevated serum immunoglobulin concentrations. The B cell tropism of BLyS is consistent with its receptor expression on B-lineage cells. The biological profile of BLyS suggests it is involved in monocyte-driven B cell activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, P A -- Belvedere, O -- Orr, A -- Pieri, K -- LaFleur, D W -- Feng, P -- Soppet, D -- Charters, M -- Gentz, R -- Parmelee, D -- Li, Y -- Galperina, O -- Giri, J -- Roschke, V -- Nardelli, B -- Carrell, J -- Sosnovtseva, S -- Greenfield, W -- Ruben, S M -- Olsen, H S -- Fikes, J -- Hilbert, D M -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):260-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human Genome Sciences, 9410 Key West Avenue, Rockville, MD 20850, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398604" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; B-Cell Activating Factor ; B-Cell Activation Factor Receptor ; B-Lymphocyte Subsets/immunology ; B-Lymphocytes/*immunology ; Cell Line ; Cells, Cultured ; Humans ; Immunoglobulins/blood ; Interferon-gamma/pharmacology ; *Lymphocyte Activation ; Membrane Proteins/chemistry/genetics/pharmacology/*physiology ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Monocytes/*immunology ; Receptors, Cytokine/metabolism ; Receptors, Tumor Necrosis Factor/metabolism ; Recombinant Proteins/pharmacology ; Sequence Alignment ; Species Specificity ; Tumor Necrosis Factor-alpha/chemistry/genetics/pharmacology/*physiology ; Up-Regulation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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