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  • 1
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    Bioinspired polymeric woods (2018)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2018-08-11
    Description: Woods provide bioinspiration for engineering materials due to their superior mechanical performance. We demonstrate a novel strategy for large-scale fabrication of a family of bioinspired polymeric woods with similar polyphenol matrix materials, wood-like cellular microstructures, and outstanding comprehensive performance by a self-assembly and thermocuring process of traditional resins. In contrast to natural woods, polymeric woods demonstrate comparable mechanical properties (a compressive yield strength of up to 45 MPa), preferable corrosion resistance to acid with no decrease in mechanical properties, and much better thermal insulation (as low as ~21 mW m –1 K –1 ) and fire retardancy. These bioinspired polymeric woods even stand out from other engineering materials such as cellular ceramic materials and aerogel-like materials in terms of specific strength and thermal insulation properties. The present strategy provides a new possibility for mass production of a series of high-performance biomimetic engineering materials with hierarchical cellular microstructures and remarkable multifunctionality.
    Electronic ISSN: 2375-2548
    Topics: Natural Sciences in General
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Mechanical Properties of Silicone Elastomer Seals for Space Docking Vehicles (2018)
    Institute of Physics (IOP)
    Details
    Publication Date: 2018-10-02
    Description: Low impact docking mechanisms (LIDM) are developing. The LIDM seal is one of the key components of the LIDM, and play very critical roles during the docking and berthing of space vehicles. Due to the severe functional requirements, it is difficult to develop the LIDM seal that is a silicone elastomer seal. The excellent mechanical property is firstly required for the LIDM seal. Five design schemes of the LIDM seal are proposed by this paper, and their mechanical properties are studied by the proposed finite element method. The mechanical properties of the LIDM seal have important impacts on the required sealing performance, docking feature and separation feature. The findings are beneficial for the development of the LIDM seal for space docking vehicles.
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics (IOP)
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  • 3
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    Localization and its absence: a new metallic state for conducting polymers (1991)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1991-06-28
    Description: A widely held view in solid-state physics is that disorder precludes the presence of long-range transport in one dimension. A series of models has been recently proposed that do not conform to this view. The primary model is the random dimer model, in which the site energies for pairs of lattice sites along a linear chain are assigned one of two values at random. This model has a set of conducting states that ultimately allow an initially localized particle to move through the lattice almost ballistically. This model is applicable to the insulator-metal transition in a wide class of conducting polymers, such as polyaniline and heavily doped polyacetylene. Calculations performed on polyaniline demonstrate explicitly that the conducting states of the random dimer model for polyaniline are coincident with recent calculations of the location of the Fermi level in the metallic regime. A random dimer analysis on polyparaphenylene also indicates the presence of a set of conducting states in the vicinity of the band edge. The implications of this model for the metallic state in other polymers, including heavily doped polyacetylene, are discussed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phillips, P -- Wu, H L -- New York, N.Y. -- Science. 1991 Jun 28;252(5014):1805-12.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17753257" 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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    Formation of pseudomorphic nanocages from Cu2O nanocrystals through anion exchange reactions (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-03-19
    Description: The crystal structure of ionic nanocrystals (NCs) is usually controlled through reaction temperature, according to their phase diagram. We show that when ionic NCs with different shapes, but identical crystal structures, were subjected to anion exchange reactions under ambient conditions, pseudomorphic products with different crystal systems were obtained. The shape-dependent anionic framework (surface anion sublattice and stacking pattern) of Cu2O NCs determined the crystal system of anion-exchanged products of CuxS nanocages. This method enabled us to convert a body-centered cubic lattice into either a face-centered cubic or a hexagonally close-packed lattice to form crystallographically unusual, multiply twinned structures. Subsequent cation exchange reactions produced CdS nanocages while preserving the multiply-twinned structures. A high-temperature stable phase such as wurtzite ZnS was also obtained with this method at ambient conditions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Hsin-Lun -- Sato, Ryota -- Yamaguchi, Atsushi -- Kimura, Masato -- Haruta, Mitsutaka -- Kurata, Hiroki -- Teranishi, Toshiharu -- New York, N.Y. -- Science. 2016 Mar 18;351(6279):1306-10. doi: 10.1126/science.aad5520.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan. ; Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan. teranisi@scl.kyoto-u.ac.jp.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26989249" 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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  • 5
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    Broadly targeted CD8(+) T cell responses restricted by major histocompatibility complex E (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-01-23
    Description: Major histocompatibility complex E (MHC-E) is a highly conserved, ubiquitously expressed, nonclassical MHC class Ib molecule with limited polymorphism that is primarily involved in the regulation of natural killer (NK) cells. We found that vaccinating rhesus macaques with rhesus cytomegalovirus vectors in which genes Rh157.5 and Rh157.4 are deleted results in MHC-E-restricted presentation of highly varied peptide epitopes to CD8alphabeta(+) T cells, at ~4 distinct epitopes per 100 amino acids in all tested antigens. Computational structural analysis revealed that MHC-E provides heterogeneous chemical environments for diverse side-chain interactions within a stable, open binding groove. Because MHC-E is up-regulated to evade NK cell activity in cells infected with HIV, simian immunodeficiency virus, and other persistent viruses, MHC-E-restricted CD8(+) T cell responses have the potential to exploit pathogen immune-evasion adaptations, a capability that might endow these unconventional responses with superior efficacy.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4769032/" 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/PMC4769032/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hansen, Scott G -- Wu, Helen L -- Burwitz, Benjamin J -- Hughes, Colette M -- Hammond, Katherine B -- Ventura, Abigail B -- Reed, Jason S -- Gilbride, Roxanne M -- Ainslie, Emily -- Morrow, David W -- Ford, Julia C -- Selseth, Andrea N -- Pathak, Reesab -- Malouli, Daniel -- Legasse, Alfred W -- Axthelm, Michael K -- Nelson, Jay A -- Gillespie, Geraldine M -- Walters, Lucy C -- Brackenridge, Simon -- Sharpe, Hannah R -- Lopez, Cesar A -- Fruh, Klaus -- Korber, Bette T -- McMichael, Andrew J -- Gnanakaran, S -- Sacha, Jonah B -- Picker, Louis J -- HHSN272201100013C/AI/NIAID NIH HHS/ -- HHSN272201100013C/PHS HHS/ -- P01 AI094417/AI/NIAID NIH HHS/ -- P01-AI094417/AI/NIAID NIH HHS/ -- P50-GM065794/GM/NIGMS NIH HHS/ -- P51 OD011092/OD/NIH HHS/ -- P51-OD011092/OD/NIH HHS/ -- R01 AI059457/AI/NIAID NIH HHS/ -- R01 AI095113/AI/NIAID NIH HHS/ -- R01 AI117802/AI/NIAID NIH HHS/ -- R01 DE021291/DE/NIDCR NIH HHS/ -- R01-AI059457/AI/NIAID NIH HHS/ -- R01-AI095113/AI/NIAID NIH HHS/ -- R01-AI117802/AI/NIAID NIH HHS/ -- R01-DE021291/DE/NIDCR NIH HHS/ -- R37 AI054292/AI/NIAID NIH HHS/ -- R37-AI054292/AI/NIAID NIH HHS/ -- U24 OD010850/OD/NIH HHS/ -- U24-OD010850/OD/NIH HHS/ -- UM1 AI100645/AI/NIAID NIH HHS/ -- UM1-AI100645-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2016 Feb 12;351(6274):714-20. doi: 10.1126/science.aac9475. Epub 2016 Jan 21.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA. ; Nuffield Department of Medicine, University of Oxford, Oxford OX37FZ, UK. ; Theoretical Biology and Biophysics Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. ; Theoretical Biology and Biophysics Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. The New Mexico Consortium, Los Alamos, NM 87545, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26797147" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigen Presentation ; Antigenic Variation ; CD8-Positive T-Lymphocytes/*immunology ; Cytomegalovirus/genetics/*immunology ; Epitopes, T-Lymphocyte/chemistry/*immunology ; Genetic Vectors/genetics/immunology ; Histocompatibility Antigens Class I/chemistry/*immunology ; Host-Pathogen Interactions/immunology ; Immune Evasion ; Killer Cells, Natural/immunology ; Macaca mulatta ; Protein Structure, Secondary ; Simian Immunodeficiency Virus/*immunology ; Vaccination
    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
    Electronic Resource
    Electronic Resource
    Repulsive binary alloys and the absence of localization: Application to Fibonacci lattices and molecularly based electronic filters (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 7369-7373 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We show here that a static disordered binary alloy in which one of the impurities is prevented from clustering in the lattice as a result of strong repulsive interactions, e.g., will possess a localization–delocalization transition regardless of the spatial dimension. We show explicitly that (N)1/2 of the electronic states are completely unscattered by the disorder and lead to superdiffusive transport with a mean-square displacement growing in time as t3/2 over a wide range of the static disorder in one dimension. The model is shown to be applicable to electron transport in Fibonacci lattices fabricated from two kinds of materials such as GaAs and AlAs. It is shown explicitly that transient grating experiments can be used to probe the location of the unattenuated states in the energy band. We propose that this model can be used to design molecularly based electronic filters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459411
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  • 7
    Electronic Resource
    Electronic Resource
    Disruption of the tryptophan binding site in the human serum albumin dimer
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 207 (1981), S. 264-269 
    Details
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-9861(81)90033-3
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of betamethasone and dexamethasone by derivitization and liquid chromatography
    Amsterdam : Elsevier
    Analytica Chimica Acta 268 (1992), S. 255-260 
    Details
    ISSN: 0003-2670
    Keywords: Betamethasone ; Dexamethasone ; Liquid chromatography ; Pharmaceuticals ; Sample preparation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0003-2670(92)85219-V
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  • 9
    Electronic Resource
    Electronic Resource
    Possible involvement of protein kinase C and cyclic AMP-dependent protein kinase in the sodium fluoride-mediated inhibition of cyclic nucleotide accumulation in smooth muscle cells
    Amsterdam : Elsevier
    Cellular Signalling 2 (1990), S. 531-536 
    Details
    ISSN: 0898-6568
    Keywords: Sodium fluoride ; cyclic nucleotides ; protein kinase C ; smooth muscle cells
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0898-6568(90)90075-L
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  • 10
    Electronic Resource
    Electronic Resource
    Gas chromatographic determination of nalidixic acid in tablets
    Amsterdam : Elsevier
    Journal of Chromatography A 157 (1978), S. 297-302 
    Details
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0021-9673(00)92346-X
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