超临界流体萃取脱除人参中痕量有机氯农药

The feasibility of removal of the organochlorine pesticides residues of hexachlorocyclohexane(BHC) from radix ginseng with supercritical CO2 was explored. Some factors, such as extraction pressure, extraction temperature, and kinds of co-solvents were investigated. The experimental results indicate that it is possible to reduce BHC residues in radix ginseng to the level of 0.1×10-6 with supercritical CO2 in the presence of suitable amount of co-solvent, such as water.     

茄尼醇和尼古丁的提取与工艺研究

烟草中两种重要成分茄尼醇和尼古丁是重要的化工和医药原料。本文重点介绍了它们的性质与用途，并分别系统地阐述了从烟草中提取茄尼醇和尼古丁的多种工艺路线，同时对各种工艺路线的优缺点及工业应用前景也进行了评述。     

摆线齿形误差检测分析

摆线齿轮是摆线针轮行星传动的关键零件,针对国内生产现状,提出了三坐标测量机和工具显微镜进行摆线轮误差的测量,两者均可反映整个台廓的齿形误差,对提高摆线轮的加工精度提供了理论保障。     

He—Ne激光照射耳门穴合并药物治疗精神分裂症

我们采用激光穴位照射合并药物治疗被确诊持续一月以上出现幻听的患者，并同单纯使用药物治疗的近期疗效进行分析比较，现简报如下。     

摆线齿形误差检测分析

摆线齿轮是摆线针轮行星传动的关键零件,针对国内生产现状,提出了三坐标测量工具显微镜摆线轮误差的测量,两者均可反映整个齿廓的齿形误差,对提高摆线轮的加工精度提供了理论保障。     

非常对话

编者的话: 在突如其来的"非典"袭击人类的时候,我们万众一心,众志成城,在没有硝烟的战场上奋力抗争,经受了严峻的考验.蓦然回首,这一路走来,许许多多、大大小小的故事记录下了人类与"非典"较量的足迹.按照党和政府一手抓抗击"非典",一手抓经济建设的号召,本期推出了以"自动识别抗击非典"为主题的特别报道,展示了自动识别技术所起的作用以及在未来的社会应急、灾难防御等领域自动识别技术将发挥的作用.该特别报道的另一个重要的内容是"非常对话",即本刊总编与市场主流企业老总对话,讨论"非典"对自动识别产业产生了哪些影响、引起了哪些变化、牵引出了哪些新的机会,业界同仁如何更好地把握新的机会,有哪些新的思考和应变之策,实施了哪些具体行动.     

超临界流体萃取脱除人参中痕量有机氯农药

The feasibility of removal of the organochlorine pesticides residues of hexachlorocyclohexane(BHC)from radix ginseng with supercritical CO2 was explored. Some factors, such as extraction pressure, extraction temperature, and kinds of co-solvents were investigated. The experimental results indicate that it is possible to reduce BHC residues in radix ginseng to the level of 0.1 × 10-6 with supercritical CO2 in the presence of suitable amount of co-solvent, such as water.