镍—钼—铊电极的析氢性能

用电沉积法制备了Ｎｉ－Ｍｏ－Ｔｌ电极，了制备条件对电极析氢活性的影响，该电极在碱性溶液中具有很高的析氢活性。通过稳态极化测量，给出了１ＭＮａＯＨ溶液中不同温度下Ｎｉ－Ｍｏ－Ｔｌ电极上析氢反应的动力学参数。     

新型偶氮苯的质谱特征与非线性光学性质

合成了偶氮苯染料－４－硝基４′－二（Ｎ，Ｎ′－羟乙基）氨基偶氮苯及其３个衍生物．染料分子的质谱行为与分子内电荷转移态有关，存在优势的Ｍ＋１碎片峰．染料分子的二阶非线性光学系数与其偶极矩的复合量用溶剂化变色法测得为≥２９０×１０－３０Ｄ·ｅｓｕ－１     

含Si—H功能键聚硅氧烷／聚芳砜嵌段型高分子配体的…

利用酚差基封端的聚砜和二氯封端、含Ｓｉ－Ｈ功能键的硅氧烷低体合成交替偶联嵌段共聚物。由于Ｓｉ－Ｈ键在碱性介质中不稳定，二氯封端的聚硅氧烷被选作嵌段基元。所得聚合物用ＩＲ、Ｈ＾１ＮＭＲ、ＧＰＳ和ＴＥＭ作了表征，结果表明嵌段合成是成功的。通过Ｓｉ－Ｇ键与烯键的加成反应在该共聚物的分子链上引入了碱性侧基而得到一系列嵌段型高分子配体。     

合金元素对Sm_2(Fe,M)_(17)N_y磁性的影响

采用机械破碎与氢破碎和氮气-固相反应法制得了Sm_2(Fe,M)_(17)N_y化合物粉末及粉末压结体,研究了金属钐含量、过渡元素(M=Co、Cr、V、Mn、Zr、Si、Ga)部分取代铁时对Sm_2(Fe_(1-x)M_x)_(17)N_y粉末压结体磁性能的影响。结果表明:铬、镓能显著提高粉末的矫顽力。Sm_2(Fe_(0.017)Ga_(0.983))_(17)N_y粉末压结体的矫顽力达到iHc=2000kA/m。     

用邻硝基苯基荧光酮和溴化十六烷基三甲基铵分光光度法测定微量铜

在pH为6.3的六次甲基四胺—盐酸介质中,铜(Ⅱ)-O-NPF-CTMAB络合物的最大吸收波长为595nm,摩尔吸光系数值ε为1.25×10~5L·mol~(-1)·cm~(-1).铜浓度在0～7μg/25ml范围内服从比耳定律.用本法测定了铝合金和天然水中微量铜.     

化学沉淀过程中形成的胶粒团聚体结构的计算机模拟

以正滴淀和反滴淀两种沉淀方式制备氢氧化锆凝胶,对其凝胶团聚状态的扫描电镜观察发现,在正滴淀方式下,胶粒主要以P-C(Particle-Cluster)团聚方式团聚,在反滴淀方式下,胶粒主要以C-C(Cluster-Cluster)团聚方式团聚。运用MonteCarlo法对P-C和C-C两种团聚方式下形成的胶粒团聚结构进行了计算机模拟,结果表明,以P-C团聚方式形成的胶粒团聚体结构致密,以C-C团聚方式形成的胶粒团聚体结构较松散,在沉淀过程中加入具有空间位阻作用的粒子可使形成的胶粒团聚体结构更松散。     

氢对步冷前后2（1／4）Cr—1Mo压力容器钢韧脆转变行为的影响

研究了2(1/4)Cr-1Mo压力容器钢步冷前后氢对韧脆转变的影响及冲击载荷下氢脆与回火脆的关系.结果发现:氢使回火脆化前后韧脆转变温度升高,氢的作用大小与回火脆倾向有关,最后提出韧脆转变模型,对两脆化的作用进行了分析.     

Evidence for hydrogen-deuterium exchange in viral particles

Heavy water (D2O) could enhance thermostability of some viruses. However, the underlying mechanism is not clear. Here we report the development of a matrix-aided gas-isotope-ratio mass spectrometry method that allows direct determination of deuterium/hydrogen (D/H) ratio in D2O-treated Japanese encephalitis virus (JEV), hepatitis A virus (HAV) and RNA from D2O-treated HAV. The D/H ratiowas expressed as δDSMOW. Our experiments showed that δDSMOW values increased significantly in D2O-treated viral samples compared to normal controls, and increment in δDSMOW of D2O, treated viral samples was in a fine linear relationship with increment in amount of samples loaded in BSA matrix. Our experiments also indicated that increased δDSMOW of D2O-treated virus correlated well with its enhanced thermostability. The results suggested that hydrogen-deuterium exchange occurred in viral particles and its RNA structure as a result of D2O-treatment. Furthermore,such exchange could cause changes in viral phenotype, such as enhanced thermostability.