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- In preparation of 1 chloropinacolone(1 chloro 3,3 dimethy1 2 butanone) by chlorination of pinacolone in methanol, the reaction mixture may vigorously bump sometimes. 在甲醇中氯化片呐酮以制备1-氯代片呐酮(1-氯代-3,3-二甲基-2-丁酮),有时会发生类似暴沸的冲料现象。
- Chloro 2 hydroxypropyl trimethyl ammonium chloride an etherizing agent,for modified starch, was synthesised from epichlorohydrin. 以环氧氯丙烷为原料合成了3-氯-2-羟丙基基三甲基氯化铵,后者作为改性淀粉的醚化剂。
- Keywords chloro 2 pyridylazo) 2;4 diaminotoluene;Ruthenium;Spectrophotometry; 关键词5-(5-氯-2-吡啶偶氮)-2.;4-二氨基甲苯;钌;分光光度法;
- Keywords ? 1 chloro 3 (1 naphthyloxy) 2 propanol;optical resolution;enzymatic esterification;lipase; 氯-3-(1-萘氧)-2-丙醇;光学拆分;酶促酯化;脂肪酶;
- Keywords dichloronitrobenzene;2 chloro 4 fluoronitrobenzene;4 chloro 2 fluoronitrobenzene;fluorization;gas chromatographic analysis; 二氯硝基苯;2-氯-4-氟硝基苯;4-氯-2-氟硝基苯;氟代;气相色谱分析;
- Keywords gas chromatography;extraction;epichlorohydrin;1;3 dichloropropanol;micro organic impurity;3 chloro 2 hydroxypropyl trimethyl ammonium chloride; 气相色谱法;萃取;环氧氯丙烷;1;3二氯丙醇;微量有机杂质;3氯2羟丙基三甲基氯化铵;
- Can you count backwards from 5? Yes, 5, 4, 3, 2, 1. 你能从5倒着数吗?可以,。
- The synthesis of 2 amino 4 methylamino 6 chloro 1,3,5 triazine by amination and methylamination from cyanuric chloride in one reaction system was described. 研究了在同一反应器中由三聚氯氰经氨化、甲胺基化合成2氨基4甲胺基6氯三嗪的方法。
- He condensed his report from 2,000 words to 1,000. 他将报告从两千字压缩到一千字。
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- He 1 2 in Suzhou , but he 3 4 in Shanghai now. 他出生在苏州,但现在居住在上海。
- Prepare for dropoff...Countdown, 5, 4, 3, 2, 1. 准备跳伞...倒计时:5,4,3,2,1。
- This city has a population of more than 1,000,000. 这个城市人口超过一百万。
- chloro 2 o methoxyphenoxyethane is an important pharmaceutical intermediate.It was synthesized from guaiacol and 1,2 dichloroethane in KOH solution,using TMBA as phase transfer catalyst(PTC). 1氯2邻甲氧基苯氧基乙烷是医药卡维地洛的中间体,它由愈创木酚和1,2二氯乙烷在PTC催化下,在碱中合成的。
- Keywords Cationic starch;3 chloro 2 hydroxypropyltrimcthyl ammonium acetate (CHPTMA);Epihalohydrin; 阳离子淀粉;3-氯-2-羟丙基三甲基醋酸铵;环氧氯丙烷;
- The score in the football game was 4 - 1. 足球比赛的比分是四比一。
- These socks retail at 1 dollar a pair. 这些袜子零卖一美圆一双。
- This mountain is 1,400 meters above sea level. 这座山海拔1,400米。
- Keywords alkylglucoside;3 chloro 2 hydroxypropyl trialkylammonium halide;epichlorohydrin;N;N dimethyl dodecylamine; 烷基糖苷;3-氯-2-羟丙基三烷基季胺盐;环氧氯丙烷;N;N-二甲基十二烷基胺;
- These socks are going at 1 a pair. 这些短袜每双卖1英镑。