Study on the charge transference and local magnetic moment of yttrium-cobalt compound

The electronic charge transference and local magnetic moment of the YCo₅ intermetallic compound were calculated using SCF-MO-DVXα method and multiple cluster model. The result shows that about one 4d-electron is transferred from anY atom to Co₁(2c), and the calculated local spin magnetic moments of Co_I(2c) and Co_II(3g) atoms in YCo₅ compound are 1.33 and 1.48μ _B , respectively, which are in very good agreement with experiments. Supported by the National Natural Science Foundation of China Qiao Haoxue: born in Apr. 1970, Master     

Ab initio calculation of structure and Raman and Infrared spectra of Trifluoromethylthiosulphenyl Chloride

The molecular model of Trifluoromethylthiosulphenyl Chloride, CF₃SSCl, was presented.Ab initio method was used to calculate the structure and Raman and Infrared spectra. The results show that CF₃SSCl possess stereoscopic structure ofC ₁ symmetry with a torsional angle of 94.2°. The potential energy distribution and isotope replacement methods were applied to determine the vibrational assignment. The vibrational frequencies and corresponding modes of the molecule were obtained. The calculated vibrational frequencies are in good agreement with experiments. Supported by the National Natural Science Foundation of China Zou Xianwu: born in Apr, 1938, Professor     

文心兰人工种子的研究

利用组织培养方法探讨了文心兰(Orchidee oncidinm)人工种子的制作.用MS培养基在3.0mg/L BA+0.15mg/L IBA的激素条件下大量产生文心兰圆球体,利用圆球体制作人工种子.包埋凝胶采用2%海藻酸钠为包埋剂,制作的人工种子在常温下存放一周,在1/2MSO培养基上作发芽率试验.     

正常赖默—悌曼反应研究:超声波辐射与相转移催化合成方法

系统研究了正常及反常赖政－悌曼反应（NormalorAbnormalReliner－TiemannReavction，NRYorART）；研究了相转移住化方法和超声波辐射技术及其在正常Reliner—Tiemann（NRT）反应中的应用，从而使反应条件温和，效率增加，对邻比大，时间缩短，取得较好收效。     

颗粒物上多环芳烃的光转化作用

本文介绍了沉积在砂粒、粘土粒和煤渣上的Ｂａｐ、荧蒽、晕苯及Ｑｕ在阳光或氙灯光照射下的光转化半衰期。结果表明影响光转化速率的因素是颗粒物种类、光源和照度。     

一种二氢苯并噻喃衍生物的新型合成法

介绍２－丁烯醛与苯硫酚之间的酸催化分子间一步成环反应，合成一种二氢苯并噻喃衍生物的新方法，产品收率高达８４％。     

HoNiSn的X射线粉末衍射数据

给出指标化的ＨｏＮｉＳｎ相的Ｘ射线粉末衍射数据。该化事物属正交晶系，ａ＝７．０６５８（６）Ａ，ｂ＝７．６４５５（２）Ａ，ｃ＝４．４３９６（１）Ａ。每个晶胞有４个化合式量，空间群为Ｐｎａ２１。     

β－烷氧基萘的合成研究

报道了β－萘酚与脂肪醇直接醚化的合成研究．反应时间短，工艺简单，β－烷氧基萘得率高达８７％～９５％以上．并对影响反应产率诸因素进行了探讨，找出最佳反应条件．     

用子波变换分析方法实时监测视觉诱发电位的潜伏期

诱发电位的实时监测在临床中有重要意义。本文提出利用多分辨率子波分析技术来实时监测视觉诱发电位的潜伏期。为克服随机噪声的影响，我们引入相邻响应的相关系数来修正所检测得的潜伏期的偏移，并应用前一次响应的波峰位置来决定当前的搜寻范围。实验表明，本方法能实时监测视觉诱发电位的潜伏期。