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原创 | 涌流商业 作者 | 李伟一个几乎全新的管理团队,在执行拯救星巴克的计划。6月4日,星巴克首席执行官倪睿安(Brian Niccol)宣布,任命北美业务高管Mike ...
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来源:深圳市宏济医疗技术开放有限公司 近日,全球首例6.3Fr一次性输尿管镜手术在法国顺利完成。由深圳宏济医疗最新研发的HU30M 6.3Fr凭其出色的 ...
1958年,H.E. Simmons和R.D.Smith首次利用二碘甲烷和锌铜偶(Zn-Cu)将无官能团烯烃(如环己烯,苯乙烯)具有立体选择性地转化为环丙烷。这一反应后来得到普遍使用,并且是一种非常高效的制备环丙烷的反应,此反应以发现者Howard EnsignSimmons, Jr.和R. D. Smith命名 ...