南极海洋芳香烃低温降解微生物的拉曼光谱分析

激光镊子拉曼光谱技术可以实现在自然状态下对单个细胞或细胞器较长时间的观察研究.应用激光镊子拉曼光谱技术实时观察南极微生物低温降解芳香烃过程中单个南极细菌的细胞生长和胞内生物大分子的动态变化过程,收集、分析其拉曼光谱,结果发现:单细胞的拉曼光谱反映了其细胞内部的生命物质组成,南极动球菌 NJ41 和希瓦氏菌 NJ49 生...     

合成气制醇钼硫基催化剂上吸附物种的红外光谱表征

利用现场ＦＴＩＲ方法对合成气制混合醇钼硫基催化剂上吸附物种进行了表征。结果表明，在反应条件下，非负载或ＳｉＯ２负载的碱助钼硫基催化剂上主要的ＣＯ加氢中间物种是ＨＣ＝Ｏ、ＣＨ２、ＨＣＯＳ、Ｏ－ＣＨ３及Ｓ＝ＣＨ３，而ＨＣＯＯ＾－和ＣＯ＾２－３的红外指纹谱带却十分弱，难以辨识。推断了该催化体系的反应历程。     

ZYA系统的拉曼光谱

测试了６０Ｗｔ％ＺｒＯ２（２．２５ｍｏｌ％Ｙ２Ｏ３）－４０Ｗｔ％ａ－Ａｌ２Ｏ３（ＺＹＡ）粉末样品受机械压力前后的拉曼光谱，并由此说明了四方相ＺｒＯ２陶瓷基质的相变增韧机制。     

ZnO纳米线在压力下的电学性质

 在金刚石压砧上测量了ZnO纳米线R-p和C-p关系，并和原先测量的纳米晶及体相ZnO的结果进行了比较。研究结果表明，ZnO纳米线在5.0 GPa左右发生相转变。其间的电阻-压力曲线呈指数下降趋势，电容呈指数上升趋势；在相转变之后电阻迅速上升，电容急速下降（指数下降），这与一般的块状和纳米晶的相转变都有所不同，表现出了纳米线与非线状纳米晶的差别。     

Photoluminescence Study of He ions hot-implanted Sapphire After 208Pb27+ of 230MeV Irradiation

In the present work the photoluminescence (PL)character of sapphire implanted with He ions and subsequently irradiated with ²⁰⁸Pb²⁷⁺ of 1.1MeV/u was studied. Sapphire single crystals were implanted with 110keV He ions at 600K temperature to fluences ranging from (0.5 to 2)×10¹⁷ ions/cm², some of them were subsequently irradiated with ²⁰⁸ Pb²⁷⁺.From experimental results we found PL spectra peaks at 375nm, 413nm, and 450nm, and it's intensity gets maximum at fluence of 5×10¹⁶ He ions/cm². Also we found a new peak at 390nm after subsequent ²⁰⁸ Pb²⁷⁺ irradiation, which is possibly due to the crystallized sediment containing nano crystal Al₂O₃ appeared on the sample surface.