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  • 1
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    Three Dimensionality and Orbital Characters of the Fermi Surface in (Tl,Rb)_{y}Fe_{2-x}Se_{2} (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-07-21
    Description: Author(s): Z.-H. Liu, P. Richard, N. Xu, G. Xu, Y. Li, X.-C. Fang, L.-L. Jia, G.-F. Chen, D.-M. Wang, J.-B. He, T. Qian, J.-P. Hu, H. Ding, and S.-C. Wang We report a comprehensive angle-resolved photoemission spectroscopy study of the tridimensional electronic bands in the recently discovered Fe selenide superconductor (Tl,Rb) y Fe 2-x Se 2 ( T c =32  K ). We determined the orbital characters and the k z dependence of the low energy electronic structure by tun... [Phys. Rev. Lett. 109, 037003] Published Fri Jul 20, 2012
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
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  • 2
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    ^{77} Se NMR Study of the Pairing Symmetry and the Spin Dynamics in K_{y} Fe_{2-x} Se_{2} (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-05-10
    Description: Author(s): Weiqiang Yu, L. Ma, J. B. He, D. M. Wang, T.-L. Xia, G. F. Chen, and Wei Bao We present a ^{77} Se NMR study of the newly discovered iron selenide superconductor K_{y} Fe_{2-x} Se_{2} , in which T_{c} =32  K. Below T_{c} , the Knight shift ^{77} K drops sharply with temperature, providing strong evidence for singlet pairing. Above T_{c} , Korringa-type relaxation indicat... [Phys. Rev. Lett. 106, 197001] Published Mon May 09, 2011
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
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  • 3
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    Unconventional Anisotropic s-Wave Superconducting Gaps of the LiFeAs Iron-Pnictide Superconductor (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-01-21
    Description: Author(s): K. Umezawa, Y. Li, H. Miao, K. Nakayama, Z.-H. Liu, P. Richard, T. Sato, J. B. He, D.-M. Wang, G. F. Chen, H. Ding, T. Takahashi, and S.-C. Wang We have performed high-resolution angle-resolved photoemission spectroscopy on Fe-based superconductor LiFeAs ( T c =18  K ). We reveal multiple nodeless superconducting (SC) gaps with 2 Δ / k B T c ratios varying from 2.8 to 6.4, depending on the Fermi surface (FS). We also succeeded in directly observing a ... [Phys. Rev. Lett. 108, 037002] Published Fri Jan 20, 2012
    Keywords: Condensed Matter: Electronic Properties, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
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  • 4
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    An antimicrobial peptide gene found in the male reproductive system of rats (2001)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2001-03-07
    Description: Little is known about the innate defense mechanisms of the male reproductive tract. We cloned a 385-base pair complementary DNA and its genomic DNA named Bin1b that is exclusively expressed in the caput region of the rat epididymis and that is responsible for sperm maturation, storage, and protection. Bin1b exhibits structural characteristics and antimicrobial activity similar to that of cationic antimicrobial peptides, beta-defensins. Bin1b is maximally expressed when the rats are sexually mature and can be up-regulated by inflammation. Bin1b appears to be a natural epididymis-specific antimicrobial peptide that plays a role in reproductive tract host defense and male fertility.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, P -- Chan, H C -- He, B -- So, S C -- Chung, Y W -- Shang, Q -- Zhang, Y D -- Zhang, Y L -- New York, N.Y. -- Science. 2001 Mar 2;291(5509):1783-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, 320, Yue-Yang Road, Shanghai 200031, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11230693" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cells, Cultured ; Cloning, Molecular ; DNA, Complementary ; Epididymis/*immunology/physiology ; Epididymitis/immunology ; Escherichia coli/growth & development ; Gene Expression Profiling ; Gene Expression Regulation, Developmental ; Genes ; Humans ; Male ; Molecular Sequence Data ; Oligonucleotides, Antisense/pharmacology ; RNA, Messenger/genetics/metabolism ; Rats ; Rats, Sprague-Dawley ; Sequence Alignment ; Sexual Maturation ; Spermatozoa/physiology ; Up-Regulation ; beta-Defensins/chemistry/*genetics/pharmacology/*physiology
    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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  • 5
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    Apical constriction drives tissue-scale hydrodynamic flow to mediate cell elongation (2014)
    Nature Publishing Group (NPG)
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    Publication Date: 2014-03-05
    Description: Epithelial folding mediated by apical constriction converts flat epithelial sheets into multilayered, complex tissue structures and is used throughout development in most animals. Little is known, however, about how forces produced near the apical surface of the tissue are transmitted within individual cells to generate the global changes in cell shape that characterize tissue deformation. Here we apply particle tracking velocimetry in gastrulating Drosophila embryos to measure the movement of cytoplasm and plasma membrane during ventral furrow formation. We find that cytoplasmic redistribution during the lengthening phase of ventral furrow formation can be precisely described by viscous flows that quantitatively match the predictions of hydrodynamics. Cell membranes move with the ambient cytoplasm, with little resistance to, or driving force on, the flow. Strikingly, apical constriction produces similar flow patterns in mutant embryos that fail to form cells before gastrulation ('acellular' embryos), such that the global redistribution of cytoplasm mirrors the summed redistribution occurring in individual cells of wild-type embryos. Our results indicate that during the lengthening phase of ventral furrow formation, hydrodynamic behaviour of the cytoplasm provides the predominant mechanism transmitting apically generated forces deep into the tissue and that cell individualization is dispensable.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4111109/" 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/PMC4111109/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉He, Bing -- Doubrovinski, Konstantin -- Polyakov, Oleg -- Wieschaus, Eric -- 5R37HD15587/HD/NICHD NIH HHS/ -- P50 GM 071508/GM/NIGMS NIH HHS/ -- R01 HD015587/HD/NICHD NIH HHS/ -- R37 HD015587/HD/NICHD NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2014 Apr 17;508(7496):392-6. doi: 10.1038/nature13070. Epub 2014 Mar 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA [2]. ; Department of Physics, Princeton University, Princeton, New Jersey 08544, USA. ; 1] Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, USA [2] Howard Hughes Medical Institute, Princeton University, Princeton, New Jersey 08544, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24590071" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Membrane/metabolism ; *Cell Polarity ; *Cell Shape ; Cytoplasm/metabolism ; Drosophila melanogaster/*cytology/*embryology ; Female ; Gastrulation ; Hydrodynamics ; Male ; Mesoderm/cytology/metabolism ; *Morphogenesis ; Movement
    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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    Sirt5 is a NAD-dependent protein lysine demalonylase and desuccinylase (2011)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2011-11-15
    Description: Silent information regulator 2 (Sir2) proteins (sirtuins) are nicotinamide adenine dinucleotide-dependent deacetylases that regulate important biological processes. Mammals have seven sirtuins, Sirt1 to Sirt7. Four of them (Sirt4 to Sirt7) have no detectable or very weak deacetylase activity. We found that Sirt5 is an efficient protein lysine desuccinylase and demalonylase in vitro. The preference for succinyl and malonyl groups was explained by the presence of an arginine residue (Arg(105)) and tyrosine residue (Tyr(102)) in the acyl pocket of Sirt5. Several mammalian proteins were identified with mass spectrometry to have succinyl or malonyl lysine modifications. Deletion of Sirt5 in mice appeared to increase the level of succinylation on carbamoyl phosphate synthase 1, which is a known target of Sirt5. Thus, protein lysine succinylation may represent a posttranslational modification that can be reversed by Sirt5 in vivo.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3217313/" 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/PMC3217313/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Du, Jintang -- Zhou, Yeyun -- Su, Xiaoyang -- Yu, Jiu Jiu -- Khan, Saba -- Jiang, Hong -- Kim, Jungwoo -- Woo, Jimin -- Kim, Jun Huyn -- Choi, Brian Hyun -- He, Bin -- Chen, Wei -- Zhang, Sheng -- Cerione, Richard A -- Auwerx, Johan -- Hao, Quan -- Lin, Hening -- 231138/European Research Council/International -- DK58920/DK/NIDDK NIH HHS/ -- P41 RR001646/RR/NCRR NIH HHS/ -- P41 RR001646-27/RR/NCRR NIH HHS/ -- R01 GM086703/GM/NIGMS NIH HHS/ -- R01 GM086703-03/GM/NIGMS NIH HHS/ -- R01 GM086703-03S1/GM/NIGMS NIH HHS/ -- R01GM086703/GM/NIGMS NIH HHS/ -- RR01646/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 2011 Nov 11;334(6057):806-9. doi: 10.1126/science.1207861.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22076378" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Animals ; Carbamoyl-Phosphate Synthase (Ammonia)/metabolism ; Cattle ; Crystallography, X-Ray ; Histones/metabolism ; Humans ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Kinetics ; Lysine/*metabolism ; Male ; Mice ; Mice, Knockout ; Mitochondria, Liver/metabolism ; NAD/metabolism ; Peptides/*metabolism ; Protein Processing, Post-Translational ; Sirtuins/chemistry/genetics/*metabolism ; Succinic 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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  • 7
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    Correlation-Induced Self-Doping in the Iron-Pnictide Superconductor Ba_{2}Ti_{2}Fe_{2}As_{4}O (2015)
    American Physical Society (APS)
    Details
    Publication Date: 2015-01-01
    Description: Author(s): J.-Z. Ma, A. van Roekeghem, P. Richard, Z.-H. Liu, H. Miao, L.-K. Zeng, N. Xu, M. Shi, C. Cao, J.-B. He, G.-F. Chen, Y.-L. Sun, G.-H. Cao, S.-C. Wang, S. Biermann, T. Qian, and H. Ding The electronic structure of the iron-based superconductor Ba 2 Ti 2 Fe 2 As 4 O (T c onset =23.5  K) has been investigated by using angle-resolved photoemission spectroscopy and combined local density approximation and dynamical mean field theory calculations. The electronic states near the Fermi level are dom... [Phys. Rev. Lett. 113, 266407] Published Wed Dec 31, 2014
    Keywords: Condensed Matter: Electronic Properties, etc.
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    Topics: Physics
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  • 8
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    Quasi-One-Dimensional Magnons in an Intermetallic Marcasite (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-04-21
    Description: Author(s): M. B. Stone, M. D. Lumsden, S. E. Nagler, D. J. Singh, J. He, B. C. Sales, and D. Mandrus We present inelastic neutron scattering measurements and first principles calculations examining the intermetallic marcasite CrSb 2 . The observed spin-wave dispersion implies that the magnetic interactions are strongly one-dimensional with antiferromagnetic chains parallel to the crystalline c axis. ... [Phys. Rev. Lett. 108, 167202] Published Fri Apr 20, 2012
    Keywords: Condensed Matter: Electronic Properties, etc.
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    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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