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  • 1
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    The diversity of flow structures in felsic dykes (2011)
    Geological Society of London
    Details
    Publication Date: 2011-06-16
    Description: : Numerous structures and textures, which can be related to magma flow, were observed in felsic dykes intruding late Mesozoic granitoid plutons in the Jiaodong peninsula, in eastern Shandong province, eastern China. These flow structures may be classified into two categories, interior and peripheral. The former group includes magmatic bands, various types of folds (e.g. injection, sheath, similar and disharmonic folds), rotation of phenocrysts, magmatic foliation or lineation, and crenulation, whereas the latter includes hot tool marks and quarrying structures. Magmatic banding resulted from shearing of mingled magma during magma flow in the dykes. The magma seemed to flow rapidly, probably triggering turbulence in some thick dykes. Interaction at the contact between the hot, moving magma and the cold, stationary wallrock sometimes produced the peripheral structures. A few measurements of hot tool marks and of magmatic lineation reveal a roughly horizontal flow of magma within these dykes. For the dominant NE–SW-striking dyke set in the Laoshan granitoid pluton, the felsic magma probably ascended on or to the SW of the pluton to feed the dyke swarm, and then flowed laterally to drive the horizontal propagation of dykes.
    Print ISSN: 0016-7649
    Topics: Geosciences
    Published by Geological Society of London
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  • 2
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    An inverse method to determine the optimal stress from imperfect fault data (2004)
    In:  Tectonophys., Luxembourg, Deutsche Geophys. Gesellschaft, vol. 387, no. 1-4, pp. 205-215, pp. 8045, (ISSN: 1340-4202)
    Details
    Publication Date: 2004
    Keywords: Fault plane solution, focal mechanism ; Structural geology ; Inversion ; Stress ; orientation
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Kinetics of small molecule interactions with membrane proteins in single cells measured with mechanical amplification (2015)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2015-10-25
    Description: Measuring small molecule interactions with membrane proteins in single cells is critical for understanding many cellular processes and for screening drugs. However, developing such a capability has been a difficult challenge. We show that molecular interactions with membrane proteins induce a mechanical deformation in the cellular membrane, and real-time monitoring of the deformation with subnanometer resolution allows quantitative analysis of small molecule–membrane protein interaction kinetics in single cells. This new strategy provides mechanical amplification of small binding signals, making it possible to detect small molecule interactions with membrane proteins. This capability, together with spatial resolution, also allows the study of the heterogeneous nature of cells by analyzing the interaction kinetics variability between different cells and between different regions of a single cell.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Defining the multivalent functions of CTCF from chromatin state and three-dimensional chromatin interactions (2016)
    Oxford University Press
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    Publication Date: 2016-07-28
    Description: CCCTC-binding factor (CTCF) is a multi-functional protein that is assigned various, even contradictory roles in the genome. High-throughput sequencing-based technologies such as ChIP-seq and Hi-C provided us the opportunity to assess the multivalent functions of CTCF in the human genome. The location of CTCF-binding sites with respect to genomic features provides insights into the possible roles of this protein. Here we present the first genome-wide survey and characterization of three important functions of CTCF: enhancer insulator, chromatin barrier and enhancer linker. We developed a novel computational framework to discover the multivalent functions of CTCF based on chromatin state and three-dimensional chromatin architecture. We applied our method to five human cell lines and identified ~46 000 non-redundant CTCF sites related to the three functions. Disparate effects of these functions on gene expression were found and distinct genomic features of these CTCF sites were characterized in GM12878 cells. Finally, we investigated the cell-type specificities of CTCF sites related to these functions across five cell types. Our study provides new insights into the multivalent functions of CTCF in the human genome.
    Keywords: Computational Methods
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 5
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    A new approach to the infrared photometric study of Be stars (2016)
    Oxford University Press
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    Publication Date: 2016-09-21
    Description: In this paper, we have collected data for almost all Be stars known so far (1991 sources in total) and photometrically study their infrared properties. 2MASS, WISE , IRAS and Akari data are analysed. It is shown from several two-colour diagrams that from 1 to 60 μm, infrared excesses for the majority of Be stars are mainly due to the free–free emission or the bound–free emission from proton–electron scattering, while for only a small number of Be stars their infrared excess originates from dust thermal radiation or is caused by the nebulosity/binarity effects. However, in the wavelength range 3.4–12 μm (the WISE W 1, W 2 and W 3 bands), some Be stars show the properties of dust thermal radiation, which is probably due to silicate dust emission and/or polycyclic aromatic hydrocarbon emission. In addition, it is found in this paper that infrared colour excesses indeed increase with wavelength for Be stars. However, no correlations between infrared colours and spectral type can be found for Be stars. Furthermore, several stars have very large infrared excesses in the near-infrared. The reasons for such infrared excesses are given in more detail.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press
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  • 6
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    Quantum confinement effects across two-dimensional planes in MoS2 quantum dots (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-06-12
    Description: The low quantum yield (∼10 −5 ) has restricted practical use of photoluminescence (PL) from MoS 2 composed of a few layers, but the quantum confinement effects across two-dimensional planes are believed to be able to boost the PL intensity. In this work, PL from 2 to 9 nm MoS 2 quantum dots (QDs) is excluded from the solvent and the absorption and PL spectra are shown to be consistent with the size distribution. PL from MoS 2 QDs is also found to be sensitive to aggregation due to the size effect.
    Print ISSN: 0003-6951
    Electronic ISSN: 1077-3118
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 7
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    Piperlongumine induces autophagy by targeting p38 signaling (2013)
    Springer Nature
    Details
    Publication Date: 2013-10-18
    Description: Piperlongumine induces autophagy by targeting p38 signaling Cell Death and Disease 4, e824 (October 2013). doi:10.1038/cddis.2013.358 Authors: Y Wang, J-W Wang, X Xiao, Y Shan, B Xue, G Jiang, Q He, J Chen, H-G Xu, R-X Zhao, K D Werle, R Cui, J Liang, Y-L Li & Z-X Xu
    Keywords: piperlongumineautophagyp38reactive oxygen species
    Electronic ISSN: 2041-4889
    Topics: Biology , Medicine
    Published by Springer Nature
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  • 8
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    Mechanism of Na+/H+ antiporting (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-08-11
    Description: Na+/H+ antiporters are central to cellular salt and pH homeostasis. The structure of Escherichia coli NhaA was recently determined, but its mechanisms of transport and pH regulation remain elusive. We performed molecular dynamics simulations of NhaA that, with existing experimental data, enabled us to propose an atomically detailed model of antiporter function. Three conserved aspartates are key to our proposed mechanism: Asp164 (D164) is the Na+-binding site, D163 controls the alternating accessibility of this binding site to the cytoplasm or periplasm, and D133 is crucial for pH regulation. Consistent with experimental stoichiometry, two protons are required to transport a single Na+ ion: D163 protonates to reveal the Na+-binding site to the periplasm, and subsequent protonation of D164 releases Na+. Additional mutagenesis experiments further validated the model.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arkin, Isaiah T -- Xu, Huafeng -- Jensen, Morten O -- Arbely, Eyal -- Bennett, Estelle R -- Bowers, Kevin J -- Chow, Edmond -- Dror, Ron O -- Eastwood, Michael P -- Flitman-Tene, Ravenna -- Gregersen, Brent A -- Klepeis, John L -- Kolossvary, Istvan -- Shan, Yibing -- Shaw, David E -- New York, N.Y. -- Science. 2007 Aug 10;317(5839):799-803.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉D. E. Shaw Research, New York, NY 10036, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17690293" target="_blank"〉PubMed〈/a〉
    Keywords: Aspartic Acid/metabolism ; Binding Sites ; Computer Simulation ; Crystallization ; Cytoplasm/metabolism ; Escherichia coli/growth & development/*metabolism ; Escherichia coli Proteins/*chemistry/*metabolism ; Hydrogen Bonding ; Hydrogen-Ion Concentration ; Ion Transport ; *Models, Biological ; Models, Molecular ; Mutagenesis ; Periplasm/metabolism ; Protein Conformation ; Protein Structure, Secondary ; *Protons ; Sodium/*metabolism ; Sodium-Hydrogen Antiporter/*chemistry/*metabolism
    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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  • 9
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    Sequencing of 50 human exomes reveals adaptation to high altitude (2010)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2010-07-03
    Description: Residents of the Tibetan Plateau show heritable adaptations to extreme altitude. We sequenced 50 exomes of ethnic Tibetans, encompassing coding sequences of 92% of human genes, with an average coverage of 18x per individual. Genes showing population-specific allele frequency changes, which represent strong candidates for altitude adaptation, were identified. The strongest signal of natural selection came from endothelial Per-Arnt-Sim (PAS) domain protein 1 (EPAS1), a transcription factor involved in response to hypoxia. One single-nucleotide polymorphism (SNP) at EPAS1 shows a 78% frequency difference between Tibetan and Han samples, representing the fastest allele frequency change observed at any human gene to date. This SNP's association with erythrocyte abundance supports the role of EPAS1 in adaptation to hypoxia. Thus, a population genomic survey has revealed a functionally important locus in genetic adaptation to high altitude.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3711608/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3711608/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yi, Xin -- Liang, Yu -- Huerta-Sanchez, Emilia -- Jin, Xin -- Cuo, Zha Xi Ping -- Pool, John E -- Xu, Xun -- Jiang, Hui -- Vinckenbosch, Nicolas -- Korneliussen, Thorfinn Sand -- Zheng, Hancheng -- Liu, Tao -- He, Weiming -- Li, Kui -- Luo, Ruibang -- Nie, Xifang -- Wu, Honglong -- Zhao, Meiru -- Cao, Hongzhi -- Zou, Jing -- Shan, Ying -- Li, Shuzheng -- Yang, Qi -- Asan -- Ni, Peixiang -- Tian, Geng -- Xu, Junming -- Liu, Xiao -- Jiang, Tao -- Wu, Renhua -- Zhou, Guangyu -- Tang, Meifang -- Qin, Junjie -- Wang, Tong -- Feng, Shuijian -- Li, Guohong -- Huasang -- Luosang, Jiangbai -- Wang, Wei -- Chen, Fang -- Wang, Yading -- Zheng, Xiaoguang -- Li, Zhuo -- Bianba, Zhuoma -- Yang, Ge -- Wang, Xinping -- Tang, Shuhui -- Gao, Guoyi -- Chen, Yong -- Luo, Zhen -- Gusang, Lamu -- Cao, Zheng -- Zhang, Qinghui -- Ouyang, Weihan -- Ren, Xiaoli -- Liang, Huiqing -- Zheng, Huisong -- Huang, Yebo -- Li, Jingxiang -- Bolund, Lars -- Kristiansen, Karsten -- Li, Yingrui -- Zhang, Yong -- Zhang, Xiuqing -- Li, Ruiqiang -- Li, Songgang -- Yang, Huanming -- Nielsen, Rasmus -- Wang, Jun -- Wang, Jian -- R01 HG003229/HG/NHGRI NIH HHS/ -- R01 MH084695/MH/NIMH NIH HHS/ -- R01HG003229/HG/NHGRI NIH HHS/ -- R01MHG084695/PHS HHS/ -- New York, N.Y. -- Science. 2010 Jul 2;329(5987):75-8. doi: 10.1126/science.1190371.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉BGI-Shenzhen, Shenzhen 518083, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20595611" target="_blank"〉PubMed〈/a〉
    Keywords: Acclimatization/*genetics ; *Altitude ; Asian Continental Ancestry Group/genetics ; Basic Helix-Loop-Helix Transcription Factors/*genetics/physiology ; Bayes Theorem ; China ; Erythrocyte Count ; Ethnic Groups/genetics ; *Exons ; Female ; Gene Frequency ; Genetic Association Studies ; *Genome, Human ; Hemoglobins/analysis ; Humans ; Male ; Oxygen/blood ; Polymorphism, Single Nucleotide ; *Selection, Genetic ; Sequence Analysis, DNA ; Tibet
    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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  • 10
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    Crystal structure of the heterodimeric CLOCK:BMAL1 transcriptional activator complex (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-06-02
    Description: The circadian clock in mammals is driven by an autoregulatory transcriptional feedback mechanism that takes approximately 24 hours to complete. A key component of this mechanism is a heterodimeric transcriptional activator consisting of two basic helix-loop-helix PER-ARNT-SIM (bHLH-PAS) domain protein subunits, CLOCK and BMAL1. Here, we report the crystal structure of a complex containing the mouse CLOCK:BMAL1 bHLH-PAS domains at 2.3 A resolution. The structure reveals an unusual asymmetric heterodimer with the three domains in each of the two subunits--bHLH, PAS-A, and PAS-B--tightly intertwined and involved in dimerization interactions, resulting in three distinct protein interfaces. Mutations that perturb the observed heterodimer interfaces affect the stability and activity of the CLOCK:BMAL1 complex as well as the periodicity of the circadian oscillator. The structure of the CLOCK:BMAL1 complex is a starting point for understanding at an atomic level the mechanism driving the mammalian circadian clock.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3694778/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3694778/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Huang, Nian -- Chelliah, Yogarany -- Shan, Yongli -- Taylor, Clinton A -- Yoo, Seung-Hee -- Partch, Carrie -- Green, Carla B -- Zhang, Hong -- Takahashi, Joseph S -- R01 GM081875/GM/NIGMS NIH HHS/ -- R01 GM090247/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2012 Jul 13;337(6091):189-94. doi: 10.1126/science.1222804. Epub 2012 May 31.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22653727" target="_blank"〉PubMed〈/a〉
    Keywords: ARNTL Transcription Factors/*chemistry/genetics/metabolism ; Amino Acid Sequence ; Animals ; CLOCK Proteins/*chemistry/genetics/metabolism ; Cells, Cultured ; *Circadian Rhythm ; Crystallography, X-Ray ; DNA/metabolism ; HEK293 Cells ; Helix-Loop-Helix Motifs ; Humans ; Mice ; Models, Molecular ; Molecular Sequence Data ; Mutant Proteins/chemistry/metabolism ; Protein Binding ; Protein Interaction Domains and Motifs ; Protein Multimerization ; Protein Structure, Quaternary ; Protein Structure, Secondary ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; Static Electricity ; *Transcriptional Activation
    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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