非简并拉曼过程中交流斯塔克位移对保真度的影响

利用修正后的哈密顿量计算非简并拉曼过程中系统、原子、光场的量子态保真度的演化,并研究了原子能级的交流斯塔克位移对系统、原子、光场的量子态保真度演化和原子与场之间的缠绕的影响.结果显示:交流斯塔克位移的存在使系统、原子、光场的量子态保真度演化周期减小,原子与光场缠绕的程度也受交流斯塔克位移的影响.     

改进物理实验教学 提高学生学习质量

为适应高职院校生源情况,提高物理实验课程的教学质量,应根据各专业对实验课程的不同要求,改革物理实验教学内容,并针对学生基础知识的差异性,采取较灵活的教学及考核方法.     

气相色谱-质谱仪及其应用

报道了气相色谱，质谱分析有机化合物的原理，并探讨了四极质谱仪的工作原理及特性，最后给出了应用实例。     

拉曼光谱法检测微量乙烯气体

首次利用激光拉曼技术对微量乙烯气体进行测试和分析,得到500 cm-1~3500 cm-1内乙烯气体的拉曼光谱。结果表明,乙烯气体的拉曼光谱有明显特征峰,这一性质为进一步研究果蔬散发乙烯气体的检测提供了依据。     

The evolution of Lucio Fontana's painting materials

Abstract

The study focuses on the range of pigments and media that the Italian artist Lucio Fontana (1899–1968) employed for selected works dating between 1949 and 1968. Samples were taken from ten groups of works, all on canvas support, as well as from painting equipment that survived in the artist's former two studios. Techniques of analysis used were pyrolysis-gas chromatography–mass spectrometry for media identification, and laser desorption ionization time-of-flight mass spectrometry and Raman microspectroscopy for pigment identification. Fontana's reputation as a daring and experimental artist, best known for his group of slashed paintings called tagli, is seen to correspond with certain unusual material choices he made. The study also points to several links that exist between seemingly unrelated cycles. These links are, among others, based on experiences with in part novel media such as oil, alkyd, polyvinyl acetate, acrylic, acrylic–vinyl, and mixtures of them. With regard to pigments, the selection of samples showed that they were mostly of a synthetic organic nature.     

Multilayered polyelectrolyte-coated gold nanorods as multifunctional optical contrast agents for cancer cell imaging

We report the application of multilayered polyelectrolyte-coated gold nanorods(GNRs) as multifunctional optical contrast agents for cancer cell imaging.The surface modification of GNRs improves their chemical stability and facilitates them to be taken up by cancer cells through electrostatic interaction.The unique longitudinal surface plasmon resonance property of GNRs makes them suitable as both scattering contrast agents and Raman contrast agents.In our experiments,the staining of GNRs in cells was furthe...     

拉曼光谱及其在物证鉴定领域的应用

在前人研究的基础上,通过实例和课题研究将拉曼光谱在物证鉴定中的应用进行总结与阐释,特别阐述了将拉曼光谱应用于文件检验中的优势,以及拉曼光谱在添改变造文件检验、文件材料检验、朱墨时序检验及不同成分交叉笔画的先后顺序检验中的应用.以期将拉曼光谱这种重要的分析测试手段引入并推广到物证鉴定领域中.     

煅烧HA的拉曼光谱研究

用拉曼光谱研究了羟基磷灰石（HA）的高温分解行为.结果显示高温煅烧后HA的拉曼谱形状和强度都发生明显变化,说明HA的成分、结构和相都发生变化.由于煅烧的HA可以提高其力学性质.因此,掌控HA煅烧过程的产物能更好地满足医用要求.     

一幅明代水陆画颜料的分析鉴别

水陆画是水陆法会供奉的绘画,它在我国绘画史上占有特殊的位置。本研究利用体视显微镜、偏光显微镜、X 射线荧光光谱和拉曼光谱等技术,首次对明代绢本水陆画颜料的形貌、成分进行了观察和测试,并分析了它的保存状况。研究表明,其红色颜料为混有少量铅丹的朱砂;蓝色颜料由蓝铜矿、赭石和白云母混合而成;浅蓝色颜料为靛蓝;绿色颜料的主体成分为氯铜矿,间有少量孔雀石和蓝铜矿;白色颜料则为水白铅矿及微量石膏。观察显示,部分颜料有开裂和剥落的现象。不难认识到,此项工作可为水陆画的颜料使用、保护修复和艺术史研究提供有价值的信息。     

氢化物-原子荧光法测定黔南常见中药材中汞和砷的含量

用氢化物发生-原子荧光光谱法测定黔南马桑、蜈蚣草、桑寄生、红蓼中汞和砷的含量.考虑了试样的预处理和消解方法以及仪器的工作条件,对实验结果作了详细的分析和讨论.实验检出限:汞:0.211μ/L,砷:0.391 μg/L,回收率在83%-100%.