什么是DR和ER

发布网友 发布时间:2022-04-20 13:49

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热心网友 时间:2023-07-12 22:02

  dr与ee值
  对于具体到某一个不对称合成来说,如果产物只有一个手性中心,在用高效液相量化其对映选择性的时候,如果不是100%光学纯,则会出现两个对映异构体的峰,峰面积的比值是er,即 enantiomeric ratio. 两个峰面积的差值就是ee值,即enantiomeric excess.如果产物有两个或者两个以上的手性中心(一般是两个,再多就太复杂了),峰面积的比值是diastereomeric ratio,两个异构体的差值则是diastereomeric excess。

  缩写
  DR = Data Register ,数据缓冲寄存器
  DR = Design Review ,设计评审,常用于“DR会议”,即设计评审会议
  DR = Defect Record,错误履历
  DR = Dead Reckoning 完全估算
  DR= Dong Ruan 东软,拼音缩写,东软员工为了避讳东软这个词被公司过滤,很多人就是用dr。
  DR=Dividend Right 证劵 证券代码前标上DR,表示除权除息,购买这样的股票不再享有送股派息的权利。
  Dr= Doctor,医生(亦可作博士)
  DR=Drow Ranger 黑暗游侠。
  DR=Directed Retry 定向重试(用于GSM移动通信中。例如:在 NOKIA设备中,在呼叫建立阶段,如果某小区话音信道拥塞,我们可以通过 Directed Retry(DR)功能来减少本小区拥塞。)
  DR=Depository Receipts,存托凭证
  DR=Defender Right 足球术语,右边后卫,同Right Guard。
  DR=debit record,财务凭证中的借记
  DR=Draft Resolution,决议草案,是“决议案(Resolution)”的草案,简称DR,通过即成为合法的国际条例或约定,影响全世界。而DR 也是模联会议的最终结果,因此具有非常重要的地位。

  Er英文缩写 ER = Emergency Room,急诊室。
  ER,美国全国广播公司著名的电视连续剧的名称,中文名称为: 《急诊室的故事》。1994年开播,最后一集在2009年4月2日结束。
  ER,医学名词,内质网的缩写.
  雌激素受体缩写,estrogen receptor.
  ER,employee relations,员工关系的缩写。ER是HR (人力资源)部门中的一个组成。
  ER英语语气词,同EH, (表示疑问,怀疑,或征求同意时所发的声音)啊!嗯!是吗?好吗?
  ER,Erbium,铒,化学元素,由莫桑德尔在1843年于瑞典发现,得名于瑞典村庄Ytterby。相对原子质量167.2,是柔软有延展性的银白色金属。

热心网友 时间:2023-07-12 22:03

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热心网友 时间:2023-07-12 22:03

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