...性, 而 呈现旋光性的化合物也不一定都含有不对称碳原子46 课堂练习：找出下列化合物中的手性碳原子* * *氯霉素美沙酮(Methadone)47 2、非碳手性中心? 手性中心可以是C以外的其它原子, 如N、P、S、Si、As等, 它们的共价化合物也是四面体结构.
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我们进行了一项双盲，多中心研究，比较了美沙美拉明与美沙酮对安慰剂治疗活动性溃疡性结肠炎的疗效。
We performed a double-blind, multicenter study, comparing MMX mesalamine vs placebo for the treatment of active ulcerative colitis.
方法实验组用电针结合耳压法，对照组用美沙酮维持疗法。
Methods Experiment group was treated by electrotherapy combined with pressing seed method for stimulating ear point group, control group was treated by methadone maintenance therapy.
据介绍，罗湖区美沙酮门诊设在流花医院，该门诊于2007年6月26日“国际禁毒日”当天正式开业。
According to the briefing, Luohu District, the methadone clinic located in Liuhua hospital, the patient in June 26, 2007 "International day Against Drugs," the official opening day.
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