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- The mechanism of the ring enlarging reaction,sorts of ring enlarging catalysts and several preparative methods of converting 7 (phenylacetamido) deacetoxycephalosporin acid to 7 ADCA were summarised. 总结了扩环反应的反应机理、扩环催化剂的种类及由头孢烷酸转化成7-ADCA的方法。
- ring enlargement reaction 环扩大反应
- ring enlarging reaction 环扩大反应
- A rapid and simple method for determinating iodine in plant samples is introduced.The iodine content was determined by enlargement reaction colorimetric method. 确定了植物样品测碘时快速、简便地制备分析试液的方法,并用溴水氧化放大反应比色法测定了分析试液中碘的含量。
- ring enlargement(RE) reaction 扩环反应
- She had the sapphire set in a gold ring. 她把那枚蓝宝石镶在金戒指上了。
- The diamond ring dazzled with brilliancy. 这只钻石戒指闪耀夺目。
- amino deacetoxy cephalosporanic acid (7-ADCA) is a intermediate for cephalosporin, it is prepared from penicillin, via oxidation reaction, ring enlargement and rearrangement reaction and enzymolysis. 氨基去乙酰氧基头孢烷酸(7-ADCA)是头孢菌素合成的重要中间体,一般以青霉素为原料,经氧化,扩环-重排,裂解三步反应制备。
- Could I ask for your reaction to this policy? 我能问一下您对这个政策的反应吗?
- The enlargement brings out the details in the photograph. 照片放大后细微之处都很清楚。
- She wears a diamond ring on her left hand. 她左手上戴着一枚钻石戒指。
- Our family reunions are always three ring circus. 我家合家团聚的场面总是热闹非凡。
- Abnormal enlargement of the breasts in a male. 男子女性型乳房男性胸部的异常增大
- A reactor is a container for chemical reaction. 反应器是进行化学反应的容器。
- I am sorry-she's out. Can you ring again later? 对不起-她出去了。你过些时候再打电话来好吗?
- The boys and girls made a ring round us. 男孩和女孩围着我们站了一圈。
- Please ring for the attendant if you need anything. 如果需要什么,请按铃找服务员。
- I'm displeased at your reaction. 我对你的反应很不满意。
- The music was so loud it made my ears ring. 音乐的声音太大了,把我耳朵震得直响。
- The policeman felt that my story didn't ring true. 警察认为我讲的话听起来不可信。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries