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  • 1
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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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  • 2
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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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  • 3
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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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