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6篇 您的检索式:作者名="R.Guo"
    题名 作者 年代 出处 被引量
1Ta_2O_5单晶的激光法生长显示文摘采用激光加热基座生长法(LHPG)生长出Ta_2O_5单晶,测量了所生长晶体的介电系数和介电损耗随晶格方向的关系。Ta_2O_5晶体表现出很强的介电各向异性,并且其介电系数的平均值比 Ta_2O_5陶瓷的大许多。Ta_2O_5单晶的成功生长证明了LHPG技术在生长高熔点晶体方面所具有的独特能力,同时也表明它作为一种特殊的激光材料加工技术在材料科学与工程中将发挥重要作用。蒋毅坚 R.Guo A.S.Bhalla 2002应用激光2002,22,2:3
2PSKNN铁电单晶及其激光法生长显示文摘采用改进的激光加热基座法 (LHPG)生长出了位于准同形相界附近的含有 Pb元素的钨青铜结构的铁电晶体 (1- x) Pb2 KNb5O15- x Sr2 Na Nb5O15(PSKNN)。通过调节激光功率和陶瓷源棒中 Pb O的含量 ,有效地控制和补偿了晶体生长过程中 Pb O的挥发。通过选择适当的籽晶 ,可以得到沿 [0 0 1],[10 0 ]和 [110 ]方向生长的 PSKNN晶体。研究了所生长晶体的铁电、介电和压电性质 ,并对其准同形相界进行了初步的讨论。蒋毅坚 R.Guo A.S.Bhalla 2000中国激光2000,27,9:2
3Two grapevine viroids in China and the possible detection of a third显示文摘S.‐F.Li R.Guo M.Tsuji T.Sano 2006Plant Pathology2006,,4:1
4(Mg_(0.95)Ca_(0.05))TiO_3晶体的激光加热基座法生长及其性质测定显示文摘采用激光加热基座法(LHPG)生长出了共晶系(Mg0.95Ca0.05)TiO3晶体。通过粉末X射线衍射分析了所生长晶体的晶相,采用扫描电镜和显微拉曼光谱技术研究了所生长晶体的微观结构。(Mg0.95Ca0.05)TiO3晶体由CaTiO3和Mg-TiO3两种晶体复合而成。介电测量结果表明:(Mg0.95Ca0.05)TiO3晶体沿生长方向具有较大的介电常数和较小的共振频率温度系数。蒋毅坚 R.Guo A.S.Bhalla 2003功能材料2003,34,2:0
5Molecular Basis of KAT2A Selecting Acyl-CoA Cofactors for Histone Modifications显示文摘Emerging discoveries about undocumented acyltransferase activities of known histone acetyltransferases(HATs)advance our understandings in the regulation of histone modifications.However,the molecular basis of HATs selecting acyl coenzyme A(acyl-CoA)substrates for histone modification is less known.We here report that lysine acetyltransferase 2A(KAT2A)as an illustrative instance of HATs can selectively utilize acetyl-CoA,propionyl-CoA,butyryl-CoA,and succinyl-CoA to directly deposit 18 histone acylation hallmarks in nucleosome.By analyzing the co-crystal structures of the catalytic domain of KAT2A in complex with acetyl-CoA,propionyl-CoA,butyryl-CoA,malonyl-CoA,succinyl-CoA,and glutaryl-CoA,we conclude that the alternative substrate-binding pocket of KAT2A and the length and electrostatic features of the acyl chain cooperatively determine the selection of the acyl-CoA substrates by KAT2A.This study reveals the molecular basis underlying the pluripotency of HATs that selectively install acylation hallmarks in nucleosomes,which might serve as instrumental mechanism to precisely regulate histone acylation profiles in cells.Sha Li Nan Li Jie He Runxin Zhou Zhimin Lu Yizhi Jane Tao Yusong R.Guo Yugang Wang 2023Research2023,,4:0
6CHARACTERIZATION OF THERMO-MECHANICAL FATIGUE PROPERTIES FOR PARTICULATE REINFORCED COMPOSITES显示文摘A Voronoi cell element, formulated with creep, thermal and plastic strain was applied for investigation of thermo-mechanical fatigue behavior for particulate reinforced composites. Under the in-phase fatigue loading, the maximum of tensile deformation at the maximum given loading are larger than that at the same maximum under the out-phase fatigue. The stiffness decreases nonlinearly with the increasing of the phase angle, which results in increasing of the area of fatigue loop curve and the decrease in fatigue life. The spatially centralizing of inclusions results in decreasing of the plastic strain amplitude and the area of fatigue loop curve, which will also reduce the consumption of single-circle plastic strain energy and prolong the fatigue life.H.J.Shi H.X.Mei R.Guo G.Mesmacque 2004Acta Metallurgica Sinica(English Letters)2004,17,4:0
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