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  • 1
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    Observation of polarized hard X-ray emission from the Crab by the PoGOLite Pathfinder (2015)
    Oxford University Press
    Details
    Publication Date: 2015-12-17
    Description: We have measured the linear polarization of hard X-ray emission from the Crab in a previously unexplored energy interval, 20–120 keV. The introduction of two new observational parameters, the polarization fraction and angle stands to disentangle geometrical and physical effects, thereby providing information on the pulsar wind geometry and magnetic field environment. Measurements are conducted using the PoGOLite Pathfinder – a balloon-borne polarimeter. Polarization is determined by measuring the azimuthal Compton scattering angle of incident X-rays in an array of plastic scintillators housed in an anticoincidence well. The polarimetric response has been characterized prior to flight using both polarized and unpolarized calibration sources. We address possible systematic effects through observations of a background field. The measured polarization fraction for the integrated Crab light curve is $18.4^{+9.8}_{-10.6}$  per cent, corresponding to an upper limit (99 per cent credibility) of 42.4 per cent, for a polarization angle of (149.2 ± 16.0)°.
    Print ISSN: 1745-3925
    Electronic ISSN: 1745-3933
    Topics: Physics
    Published by Oxford University Press
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  • 2
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    Light quality determines primary production in nutrient-poor small lakes (2019)
    Springer Nature
    Details
    Publication Date: 2019
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 3
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    Efficient epoxidation of olefins with 〉/=99% selectivity and use of hydrogen peroxide (2003)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2003-05-10
    Description: Epoxides are an important class of industrial chemicals that have been used as chemical intermediates. Catalytic epoxidation of olefins affords an interesting production technology. We found a widely usable green route to the production of epoxides: A silicotungstate compound, [gamma-SiW10O34(H2O)2]4-, is synthesized by protonation of a divacant, lacunary, Keggin-type polyoxometalate of [gamma-SiW10O36]8- and exhibits high catalytic performance for the epoxidation of various olefins, including propylene, with a hydrogen peroxide (H2O2) oxidant at 305 kelvin. The effectiveness of this catalyst is evidenced by 〉/=99% selectivity to epoxide, 〉/=99% efficiency of H2O2 utilization, high stereospecificity, and easy recovery of the catalyst from the homogeneous reaction mixture.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kamata, Keigo -- Yonehara, Koji -- Sumida, Yasutaka -- Yamaguchi, Kazuya -- Hikichi, Shiro -- Mizuno, Noritaka -- New York, N.Y. -- Science. 2003 May 9;300(5621):964-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Applied Chemistry, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyoku, Tokyo 113-8656, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12738860" target="_blank"〉PubMed〈/a〉
    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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  • 4
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    Molecular basis of tubulin transport within the cilium by IFT74 and IFT81 (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-08-31
    Description: Intraflagellar transport (IFT) of ciliary precursors such as tubulin from the cytoplasm to the ciliary tip is involved in the construction of the cilium, a hairlike organelle found on most eukaryotic cells. However, the molecular mechanisms of IFT are poorly understood. Here, we found that the two core IFT proteins IFT74 and IFT81 form a tubulin-binding module and mapped the interaction to a calponin homology domain of IFT81 and a highly basic domain in IFT74. Knockdown of IFT81 and rescue experiments with point mutants showed that tubulin binding by IFT81 was required for ciliogenesis in human cells.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4359902/" 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/PMC4359902/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bhogaraju, Sagar -- Cajanek, Lukas -- Fort, Cecile -- Blisnick, Thierry -- Weber, Kristina -- Taschner, Michael -- Mizuno, Naoko -- Lamla, Stefan -- Bastin, Philippe -- Nigg, Erich A -- Lorentzen, Esben -- New York, N.Y. -- Science. 2013 Aug 30;341(6149):1009-12. doi: 10.1126/science.1240985.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Structural Cell Biology, Max Planck Institute of Biochemistry, Martinsried, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23990561" target="_blank"〉PubMed〈/a〉
    Keywords: Cell Line, Tumor ; Chlamydomonas reinhardtii/genetics/metabolism ; Cilia/genetics/*physiology ; Crystallography, X-Ray ; Cytoskeletal Proteins/chemistry/genetics/*metabolism ; Gene Knockdown Techniques ; Humans ; Muscle Proteins/chemistry/genetics/*metabolism ; Plant Proteins/chemistry/genetics/metabolism ; Point Mutation ; Protein Structure, Tertiary ; Protein Transport ; RNA, Small Interfering/genetics ; Tubulin/*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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  • 5
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    Structural basis for iron piracy by pathogenic Neisseria (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-02-14
    Description: Neisseria are obligate human pathogens causing bacterial meningitis, septicaemia and gonorrhoea. Neisseria require iron for survival and can extract it directly from human transferrin for transport across the outer membrane. The transport system consists of TbpA, an integral outer membrane protein, and TbpB, a co-receptor attached to the cell surface; both proteins are potentially important vaccine and therapeutic targets. Two key questions driving Neisseria research are how human transferrin is specifically targeted, and how the bacteria liberate iron from transferrin at neutral pH. To address these questions, we solved crystal structures of the TbpA-transferrin complex and of the corresponding co-receptor TbpB. We characterized the TbpB-transferrin complex by small-angle X-ray scattering and the TbpA-TbpB-transferrin complex by electron microscopy. Our studies provide a rational basis for the specificity of TbpA for human transferrin, show how TbpA promotes iron release from transferrin, and elucidate how TbpB facilitates this process.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3292680/" 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/PMC3292680/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Noinaj, Nicholas -- Easley, Nicole C -- Oke, Muse -- Mizuno, Naoko -- Gumbart, James -- Boura, Evzen -- Steere, Ashley N -- Zak, Olga -- Aisen, Philip -- Tajkhorshid, Emad -- Evans, Robert W -- Gorringe, Andrew R -- Mason, Anne B -- Steven, Alasdair C -- Buchanan, Susan K -- P41 RR005969/RR/NCRR NIH HHS/ -- P41-RR05969/RR/NCRR NIH HHS/ -- R01 GM086749/GM/NIGMS NIH HHS/ -- R01-DK21739/DK/NIDDK NIH HHS/ -- R01-GM086749/GM/NIGMS NIH HHS/ -- U54 GM087519/GM/NIGMS NIH HHS/ -- U54-GM087519/GM/NIGMS NIH HHS/ -- ZIA DK036143-04/Intramural NIH HHS/ -- England -- Nature. 2012 Feb 12;483(7387):53-8. doi: 10.1038/nature10823.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, US National Institutes of Health, Bethesda, Maryland 20892, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22327295" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoproteins/chemistry/metabolism ; Bacterial Proteins/*chemistry/metabolism/ultrastructure ; Binding Sites ; Biological Transport ; Cattle ; Crystallography, X-Ray ; Humans ; Iron/*metabolism ; Mice ; Models, Molecular ; Molecular Dynamics Simulation ; Neisseria/*metabolism/pathogenicity ; Protein Conformation ; Scattering, Small Angle ; Species Specificity ; Structure-Activity Relationship ; Transferrin/chemistry/metabolism/ultrastructure ; Transferrin-Binding Protein A/*chemistry/*metabolism/ultrastructure ; Transferrin-Binding Protein B/*chemistry/*metabolism/ultrastructure ; X-Ray Diffraction
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    Molecular loops in the galactic center: evidence for magnetic flotation (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-10-07
    Description: The central few hundred parsecs of the Milky Way host a massive black hole and exhibit very violent gas motion and high temperatures in molecular gas. The origin of these properties has been a mystery for the past four decades. Wide-field imaging of the (12)CO (rotational quantum number J = 1 to 0) 2.6-millimeter spectrum has revealed huge loops of dense molecular gas with strong velocity dispersions in the galactic center. We present a magnetic flotation model to explain that the formation of the loops is due to magnetic buoyancy caused by the Parker instability. The model has the potential to offer a coherent explanation for the origin of the violent motion and extensive heating of the molecular gas in the galactic center.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fukui, Yasuo -- Yamamoto, Hiroaki -- Fujishita, Motosuji -- Kudo, Natsuko -- Torii, Kazufumi -- Nozawa, Satoshi -- Takahashi, Kunio -- Matsumoto, Ryoji -- Machida, Mami -- Kawamura, Akiko -- Yonekura, Yoshinori -- Mizuno, Norikazu -- Onishi, Toshikazu -- Mizuno, Akira -- New York, N.Y. -- Science. 2006 Oct 6;314(5796):106-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Astrophysics, Nagoya University, Chikusa-ku, Nagoya 464-8602, Japan. fukui@a.phys.nagoya-u.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17023654" target="_blank"〉PubMed〈/a〉
    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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  • 7
    Electronic Resource
    Electronic Resource
    Medium ring homologs of proline as potential amino acid antimetabolites (1971)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 14 (1971), S. 501-508 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00288a010
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Diel changes of larval drift among amphidromous gobies in Japan, especially Rhinogobius brunneus (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 37 (1990), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Larvae of amphidromous gobies migrate to the sea as passive drift. In order to identify the diel drift pattern (DDP) of each species, we conducted 24 hour collections in different sections ofthree rivers. The DDPs ofdifferent species at each sampling station were almost identical, but the DDP of each species varied among stations, depending on the topographical features of water-courses. Downstream migration occurred throughout the day in steep water-courses while it was nocturnal with a peak in number soon after sunset in gentle gradients in the plain and was also nocturnal with a small amount of day time drifting between the two gradients. It is suggested that the larvae drifting from the upper parts of the river in daytime halted their migration in a pool with low flow rate until twilight.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1990.tb05857.x
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  • 9
    Electronic Resource
    Electronic Resource
    Early starvation limits survival in amphidromous fishes (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 54 (1999), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Newly hatched amphidromous larvae drift downstream to the sea. Since there is practically no food available for drifting larvae, an extended downstream migration may enhance the risk of starvation. We hypothesized that early survival of amphidromous fish varies among populations according to the length of the river, due to its effect on larval starvation. The hypothesis was tested with the common Japanese amphidromous goby, Rhinogobius brunneus . Based on morphological characteristics, larvae were categorized as being in an endogenous feeding state (EFS) or irrecoverable starved state (ISS). The frequency of ISS larvae in the population from a long river was nearly twice the frequency in the population from a short stream. More than half of larvae were judged to be dying during downstream migration in the comparatively long river, although this was possibly an underestimation. It is suggested that early starvation limits reproductive success far from the sea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1999.tb02027.x
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  • 10
    Electronic Resource
    Electronic Resource
    Molecular weight of Na, K-ATPase approximated by the radiation inactivation method
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 29 (1967), S. 588-592 
    Details
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0006-291X(67)90526-8
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