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WANG Hua ZHAO Mi-feng PU Li-mei DING Wei HUANG Yi-bing HOU Rui-zhen ZENG Hong-bin XU Li ZHANG Xue-zhong 《高等学校化学研究》2006,22(6):721-726
IntroductionA characteristic tripeptide sequence Arg-Gly-Asp(RGD) that is found within fibronectin and other rela-ted adhesion molecules in extracellular matrices(ECM)has received considerable attention from researcherssince it was proved to be a recognit… 相似文献
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Wang Ke Liu Ning Li Jun-qiang Wang Han Fu Xiao-long Li Huan Fan Xue-zhong Pang Wei-qiang 《Structural chemistry》2019,30(4):1233-1241
Structural Chemistry - Three 2,3-bis(hydroxymethyl)-2,3-dinitro-1,4-butanediol tetranitrate (SMX)–based propellants were firstly reported, then the specific impulses of SMX-based propellants... 相似文献
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Thermal behavior of 1,1-diamino-2,2-dinitroethylene 总被引:2,自引:0,他引:2
The thermal behavior of 1,1-diamino-2,2-dinitroethlene (DADNE) was followed by differential scanning calorimetry (DSC) and thermogravimetry (TG). In addition, it was further investigated by the combination techniques of in situ thermolysis cell or fast thermolysis probe with rapid-scan Fourier transform infrared spectroscopy (thermolysis/RSFT-IR and fast thermolysis/RSFT-IR) and by mass spectroscopy (MS). The results showed that there was a phase transition (beta-DADNE to gamma-DADNE) at the temperature of 119 degrees C, and that the gas products of DADNE consisted of CO2, CO, NO2, NO, N2O, HCN, and HNCO, of which CO2, NO, N2O, and HCN present themselves in both the first and second stages of DADNE decomposition process, whereas CO, NO2, and HNCO are only caused by the second stage, in air atmosphere. The C=C and C-NH2 bonds of DADNE molecules are broken in the first stage of the decomposition process in open air, and one of the C-NO2 and one of the C-NH2 bonds of the molecules are broken in the same stage under electrospray ionization condition. 相似文献
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In analysing the geometrically nonlinear problem of an axisymmetrical thin-walled shell, the paper combines the perturbation method with the finite element method by introducing the former into the variational equation to obtain a series of linear equations of different orders and then solving the equations with the latter. It is well-known that the finite element method can be used to deal with difficult problems as in the case of structures with complicated shapes or boundary conditions, and the perturbation method can change the nonlinear problems into linear ones. Evidently the combination of the two methods will give an efficient solution to many difficult nonlinear problems and clear away some obstacles resulted from using any of the two methods solely. The paper derives all the formulas concerning an axisym-metric shell of large deformation by means of the perturbation finite element method and gives two numerical examples,the results of which show good convergence characteristics. 相似文献
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研究了机器维修的排序问题,假设第i台机器的维修起始日期为第αi天(i=1,2,…,n).n台机器的维修起始日期简记为(α1,α2,…,αn),得到一系列(α1,α2,…,αn)存在的充分或必要条件。 相似文献
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CAO Jun-gang CAO Hui-min LIN Ying-jie LIANG Da-peng DUAN Hai-feng HAN Song-yang ZHAO Xue-zhong 《高等学校化学研究》2011,27(5):780-783
Lewis acidic guanidinium ionic liquid(LAGIL) 2c was used as a novel, efficient and recyclable catalyst for aminolysis of epoxides under solvent-free and room temperature conditions, giving the corresponding β-amino alcohols with moderate to excellent regioselectivity(up to 91:9) in high yields(up to 97%). In addition, LAGIL 2c was recycled three times without any loss of catalytic activity and selectivity to the product. 相似文献
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IntroductionIn the past few years,some researchers foundthat small peptides derived from the hydrolysate offood protein play an important role in regulatingautonomic nervous system,activating the cellularimmunity function,ameliorating the cardiovascularfunction,antioxidizng and antaging,etc.[1— 8] .Par-tial proteolysis is effective for improving the func-tional properties of protein.Small peptides havesome advantages compared to protein,such as lowosmotic pressure,fast absorption,good taste a… 相似文献
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Thermal behavior of copper(II) 4-nitroimidazolate 总被引:1,自引:0,他引:1
L. Ji-zhen F. Xue-zhong H. Rong-zu Z. Xiao-dong Z. Feng-qi G. Hong-Xu 《Journal of Thermal Analysis and Calorimetry》2009,96(1):195-201
The thermal behavior of copper(II) 4-nitroimidazolate (CuNI) under static and dynamic states are studied by means of high-pressure
DSC (PDSC) and TG with the different heating rates and the combination technique of in situ thermolysis cell with rapid-scan
Fourier transform infrared spectroscopy (thermolysis/RSFTIR).
The results show that the apparent activation energy and pre-exponential factor of the major exothermic decomposition reaction
of CuNI obtained by Kissinger’s method are 233.2 kJ mol−1 and 1017.95 s−1, respectively. The critical temperature of the thermal explosion and the adiabatic time-to-explosion of CuNI are 601.97 K
and 4.4∼4.6 s, respectively. The decomposition of CuNI begins with the split of the C-NO2 and C-H bonds, and the decomposition process of CuNI under dynamic states occurs less readily than those under static states
because the dynamic nitrogen removes the strong oxidative decomposition product (NO2). The above-mentioned information on thermal behavior is quite useful for analyzing and evaluating the stability and thermal
charge rule of CuNI. 相似文献
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StudiesontheConformationofPoly(1┐naphthol)AsembledbyHorseradishPeroxidaseinAqueousMicele*CHENSong-ming**,ZHANGXue-zhong,CHAI... 相似文献