Avalanche Phenomenon of Superthermal Electrons Measured by SDD with New SPHA during ECRH

Two high performance silicon drift detectors （SDD） are installed at the equatorial port with z = 0 and z = -16.4 cm on HL-2A tokamak, respectively. These SDDs combine with the new and non-conventional software pulse height analyser （SPHA ） successfully developed more recently by us to measure the time evolution of soft x-rays spectra, the thermal and superthermal electron temperatures. The high-quality three-dimensional figure of time evolution for soft x-rays energy spectra is easily obtained by combination of a new SPHA and computer. Therefore, the measurement accuracies and the time resolutions of thermal and superthermal electron temperatures are also improved. The enhancement phenomenon of superthermal electron during electron cyclotron resonance heating （ECRH） can be explained by the combination of superthermal electron avalanche theory and experimental parameters.     

An undecanuclear iron (Ⅲ) oxo-hydroxo aggregate with near nanometer size:Synthesis and crystal structure of[Fe_(11)O_6(OH)_6(O_2CPh)_3(O_2CPhMe-p)_(12)]

The tide compound is formed by controlled hydrolytic polymerization in nonaqueous solution of simple oxo-bridged binuclear ferric salts under the presence of carboxylate ligands. The rhombohedral crystalline form of the cluster with six imidazole molecules, which has crystallographically required C3v symmetry, will be reported. The largest Fe-Fe distance in the undecairon oxo-hydroxo cluster is about 0.68 nm and the cluster has a diameter near 2 nm, which implies that this cluster reaches a nanometer-sized dimension.     

HIV-1嵌合抗原的纯化及免疫原性分析

为获得高效的HIV诊断试剂,选定HIV-1的外膜蛋白env中469-511aa,538-674aa和700-734aa3处包含较多抗原位点的区域作为免疫抗原,用PCR的方法从HIV-1全基因扩增编码这3处片段的基因序列,将它们克隆到原核表达载体中,利用大肠杆菌表达系统表达嵌合蛋白.结果发现,3段嵌合基因能在大肠杆菌BL21(Star)中表达,通过Ni-sepharose4B金属Ni螯合层析柱分离纯化目的产物,酶联免疫检测结果表明,纯化抗原有较强的抗原特异性.     

酸性接枝淀粉固定化糖化酶及稳定性研究

糖化酶(EC.3.2.1.3,GA)是工业上应用规模最大的3种酶制剂之一.目前,工业生产中大多采用游离GA,这给产物的分离和纯化带来诸多不便.因此,采用固定化糖化酶(IGA)是酶制剂工业发展的必然趋势.     

多酸亚胺衍生物的可控组装

介绍了课题组与合作单位根据分子工程学的思想,采用自主发展的多酸亚胺化方法,借用经典的有机合成反应来设计、合成多酸基(POM)有机-无机杂化纳米分子材料的最新进展.     

Stochastic analysis of monostable vibration energy harvesters with fractional derivative damping under Gaussian white noise excitation

Nonlinear Dynamics - To the best of authors’ knowledge, the dynamical behaviors of vibration energy harvesters with fractional derivative damping have not been discussed by researchers with...     

An undecanuclear iron (III) oxo-hydroxo aggregate with near nanometer size: Synthesis and crystal structure of [Fe11O6(OH)6(O2CPh)3(O2CPhMe-p)12]

The title compound is formed by controlled hydrolytic polymerization in nonaqueous solution of simple oxo-bridged binuclear ferric salts under the presence of carboxylate ligands. The rhombohedral crystalline form of the cluster with six imidazole molecules, which has crystallographically required C_3y symmetry, will be reported. The largest Fe—Fe distance in the undecairon oxo-hydroxo cluster is about 0.68 nm and the cluster has a diameter near 2 nm, which implies that this cluster reach- a nanometer-sized dimension.     

Stochastic bifurcation analysis of a friction-damped system with impact and fractional derivative damping

Nonlinear Dynamics - Impact together with friction can be widely found in the mechanical engineering. Although some scholars have investigated the stochastic systems with impact and friction, they...     

单取代多金属氧酸盐有机亚胺衍生物(n-Bu4N)2[Mo6O18(≡NAr)](Ar=o-GH3OC6H4)的合成

采用N,N'-二环已基碳酰亚胺(DCC)脱水法,以(n-Bu4N)2[Mo6O19]:DCC:邻甲氧基苯胺=1.5:1.1:1.0的摩尔比,无水乙腈中加热回流12 h,通过丙酮/乙醇溶液重结晶两次,得到橘红色片状晶体.探讨了最佳反应条件:DCC的量在1.0～1.1 mmol,反应时间12 h.通过元素分析,UV/Vis光谱和1H NMR谱的研究表明,该晶体是一种新的六钼酸盐的有机亚胺衍生物(n-Bu4N)2[Mo6O18(≡NAr)](Ar=o-CH3OC6H4).