X射线相衬成像用于生物碱沉淀研究的可行性  

Feasibility of using X-ray phase-contrast imaging to study alkaloidial precipitates

作　　者：魏逊[1] 肖体乔[1] 陈敏[1] 骆玉宇[1] 席再军[1] 刘丽想[1] 杜国浩[1] 徐洪杰[1] 田玉莲[2] 朱佩平[2] 黄万霞[2] 袁清习[2] 

机构地区：[1]中国科学院上海应用物理研究所,上海201800 [2]中国科学院北京高能物理研究所,京100039

出　　处：《核技术》2004年第10期721-724,共4页Nuclear Techniques

基　　金：上海市科技攻关项目(No. 022261023);上海市自然科学基金(No. 02ZF14116);国家自然科学基金面上项目(No.10275087)资助

摘　　要：生物碱与一些特殊的试剂作用生成沉淀。这些反应可用于生物碱的检测和精制。本文分别在同步辐射装置和微聚焦 X 射线成像系统上用 X 射线相衬成像(XPCI)方法研究了三种不同类型的生物碱沉淀的结构。研究结果显示:在 Hager 试剂作用下,有机胺类的秋水仙碱沉淀呈针状,吡啶类的槟榔碱沉淀呈胶团状,异喹啉类的小檗碱沉淀呈花瓣状。与目测或在光学显微镜下观察到的形态有很大差别。为今后用 XPCI 方法研究更复杂的化学反应体系提供参考和依据。The alkaloids are organic nitrogenous bases found mainly in plants, which deposit with certain reagents in water. These precipitation reactions can be used to determine the alkaloids’ existence and to refine them. The present paper studied three different types of alkaloidal precipitates by X-ray phase-contrast imaging (XPCI) based both on Beijing Synchrotron Radiation Facility (BSRF) and on a nanofocus X-ray tube laboratory system. The XPCI results reveal the needle precipitate of colchicines (amine alkaloid), the micelle precipitate of arecoline (pyridine alkaloid) and the petal precipitate of berberine (isoquinoline alkaloid). Comparison of the results obtained by different methods has been made to verify the feasibility of XPCI’s future application to more complicated chemical systems.

关 键 词：X射线相衬成像 生物碱 沉淀 结构 

分 类 号：O434.19[机械工程—光学工程] Q946.88[理学—光学]