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  • Structure, structural phase transitions, mechanical properties, defects  (5)
  • Bathymetric data
  • Chemistry
  • Landing statistics
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  • 2015-2019
  • 2010-2014  (7)
  • 2012  (7)
  • 1
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    Density functional theory study of phase IV of solid hydrogen (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-06-16
    Description: Author(s): Chris J. Pickard, Miguel Martinez-Canales, and Richard J. Needs We have studied solid hydrogen up to pressures of 300 GPa and temperatures of 350 K using density functional theory methods and have found “mixed structures” that are more stable than those predicted earlier. Mixed structures consist of alternate layers of strongly bonded molecules and weakly bonded... [Phys. Rev. B 85, 214114] Published Fri Jun 15, 2012
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Effects of high-pressure on the structural, vibrational, and electronic properties of monazite-type PbCrO_{4} (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-01-13
    Description: Author(s): E. Bandiello, D. Errandonea, D. Martinez-Garcia, D. Santamaria-Perez, and F. J. Manjón [Phys. Rev. B 85, 024108] Published Thu Jan 12, 2012
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Structure of a 2^{∘} (010) Cu twist boundary interface and the segregation of vacancies and He atoms (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-02-08
    Description: Author(s): Enrique Martínez, John P. Hirth, Michael Nastasi, and Alfredo Caro A 2 ∘ (010) Cu twist boundary is characterized by two sets of 1/2 〈 110 〉 screw dislocations crossing at misfit dislocation intersections (MDIs). Molecular dynamics simulations show that between MDIs, dislocations split into the two possible {111} planes that share the 〈 110 〉 direction, forming a constri... [Phys. Rev. B 85, 060101] Published Tue Feb 07, 2012
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 4
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    Asymmetric segregation of polarized antigen on B cell division shapes presentation capacity (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-01-28
    Description: During the activation of humoral immune responses, B cells acquire antigen for subsequent presentation to cognate T cells. Here we show that after mouse B cells accumulate antigen, it is maintained in a polarized distribution for extended periods in vivo. Using high-throughput imaging flow cytometry, we observed that this polarization is preserved during B cell division, promoting asymmetric antigen segregation among progeny. Antigen inheritance correlates with the ability of progeny to activate T cells: Daughter cells receiving larger antigen stores exhibit a prolonged capacity to present antigen, which renders them more effective in competing for T cell help. The generation of progeny with differential capacities for antigen presentation may have implications for somatic hypermutation and class switching during affinity maturation and as B cells commit to effector cell fates.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Thaunat, Olivier -- Granja, Aitor G -- Barral, Patricia -- Filby, Andrew -- Montaner, Beatriz -- Collinson, Lucy -- Martinez-Martin, Nuria -- Harwood, Naomi E -- Bruckbauer, Andreas -- Batista, Facundo D -- Cancer Research UK/United Kingdom -- New York, N.Y. -- Science. 2012 Jan 27;335(6067):475-9. doi: 10.1126/science.1214100.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lymphocyte Interaction Laboratory, London Research Institute, Cancer Research UK, 44 Lincoln's Inn Fields, London, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22282815" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Antigen Presentation ; Antigens/*analysis/*immunology ; B-Lymphocytes/cytology/*immunology ; Cell Division ; Cell Proliferation ; Cells, Cultured ; Coculture Techniques ; Computer Simulation ; Flow Cytometry ; *Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Models, Immunological ; Muramidase/analysis/immunology ; T-Lymphocytes/*immunology
    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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    Fate-restricted neural progenitors in the mammalian cerebral cortex (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-08-11
    Description: During development of the mammalian cerebral cortex, radial glial cells (RGCs) generate layer-specific subtypes of excitatory neurons in a defined temporal sequence, in which lower-layer neurons are formed before upper-layer neurons. It has been proposed that neuronal subtype fate is determined by birthdate through progressive restriction of the neurogenic potential of a common RGC progenitor. Here, we demonstrate that the murine cerebral cortex contains RGC sublineages with distinct fate potentials. Using in vivo genetic fate mapping and in vitro clonal analysis, we identified an RGC lineage that is intrinsically specified to generate only upper-layer neurons, independently of niche and birthdate. Because upper cortical layers were expanded during primate evolution, amplification of this RGC pool may have facilitated human brain evolution.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4287277/" 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/PMC4287277/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Franco, Santos J -- Gil-Sanz, Cristina -- Martinez-Garay, Isabel -- Espinosa, Ana -- Harkins-Perry, Sarah R -- Ramos, Cynthia -- Muller, Ulrich -- MH078833/MH/NIMH NIH HHS/ -- NS046456/NS/NINDS NIH HHS/ -- NS060355/NS/NINDS NIH HHS/ -- R01 NS046456/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2012 Aug 10;337(6095):746-9. doi: 10.1126/science.1223616.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Dorris Neuroscience Center and Department of Cell Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22879516" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Lineage ; Cell Proliferation ; Cells, Cultured ; Cerebral Cortex/*cytology/embryology ; Homeodomain Proteins/genetics ; Mice ; Neural Stem Cells/*cytology/physiology ; *Neurogenesis ; Neuroglia/*cytology ; Neurons/*cytology/physiology ; Recombination, Genetic
    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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  • 6
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    Decomposition kinetics of Fe-Cr solid solutions during thermal aging (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-12-18
    Description: Author(s): Enrique Martínez, Oriane Senninger, Chu-Chun Fu, and Frédéric Soisson The decomposition of Fe-Cr solid solutions during thermal aging is modeled by atomistic kinetic Monte Carlo simulations, using a rigid lattice approximation with pair interactions that depend on the local composition and temperature. The pair interactions are fitted on ab initio calculations of mixi... [Phys. Rev. B 86, 224109] Published Mon Dec 17, 2012
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 7
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    Atomistic modeling of long-term evolution of twist boundaries under vacancy supersaturation (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-12-21
    Description: Author(s): Enrique Martínez and Alfredo Caro Vacancy accumulation in 4 ∘ {110} bcc Fe and 2 ∘ {111} fcc Cu twist boundaries (TBs) has been studied. These interfaces are characterized by different sets of screw dislocations: two sets of a 0 /2〈111〉 and one set of a 0 /2〈100〉 in Fe and three sets of a 0 /6〈112〉 in Cu. We observe that vacancies agglomera... [Phys. Rev. B 86, 214109] Published Thu Dec 20, 2012
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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