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- To perform a mathematical operation,particularly one that is complex or multi step. 完成一个数学运算,特别是指复杂的或需要多步才能完成的运算。
- AIM: A new route of synthesis of benflumetol(I) by 5 step reactions was developed. 目的：设计了抗疟药本芴醇（I）的5步合成新路线。
- METHODS Ranolazine was synthesized by using 2, 6-dimethylaniline and guaiacol as the starting material fellewed by 4 step reactions. 方法以2,6-二甲基苯胺、愈创木酚为原料,经酰化、烃化等4步反应制得雷诺嗪。
- Cationic mono-ester surfactants(CMESA)was prepared using glycidyl trimethyl ammonium chloride(GTMAC)and stearic acid as starting materials with a single step reaction. 以自制的失水甘油基三甲基氯化铵(GTMAC)和硬脂酸为原料,经一步反应合成阳离子单酯表面活性剂(CMESA)。
- Homopiperazine was synthesized by using diethylamine as starting material via three step reaction of tosylation,cyclized and detosylation. 以乙二胺为初始原料,经磺酰化、环化、脱磺酰化3步反应合成高哌嗪,总收率可达78%25。
- The calculated results show that the aza Wittig reaction is a two step reaction, having one four membered ring intermediate on its reaction surface. 计算结果表明该反应是一个二步反应，在反应途径上存在一个四元环中间体。
- The organic compounds obtained from the first step reaction are mainly benzophenone,9,10-anthraquinone and 1,3-Diphenylisobenzofuran and so on. 第一步中生成的有机化合物主要成分为二苯甲酮、9，10-蒽醌和1，3-二苯基异苯并呋喃等。
- Probenazole, control of rice blast, was synthesized via a two - step reaction: chlorination and condensation , starting from saccharin. 烯丙异噻唑是用于防治水稻稻瘟病的杀菌剂,以糖精为原料,经氯化,缩合两步反应合成。
- Polymers are most commonly formed by two main types of growth reaction traditionally referred to us condensation (step reaction) and addition (chain reaction) processes. 形成聚合物的最普通方式是靠两种主要的增长反应，习惯上分别称做缩合（逐步反应）过程和加成（链式反应）过程。
- Metamitron, 4-amino-3-methyl-6-phenyl-l,2,4-triazin-5-one, a kind of herbicide was synthesized from phenylglyoxylic acid ester by three step reactions such as condensation, hydrazinolysis and cyclization. The yield is 48.4%. 本文仿制专利的路线，以苯乙酮酸酯为原料，经缩合、肼解及合环三步反应合成了除草剂苯嗪草酮，并且对专利的部分方法进行了改进，使产率从30%25提高为48.;4%25。
- The core-shell polyacrylate latex was synthesized by multi steps seeded emulsion polymerization. Butyl acrylate(BA)? 2-ethylhexylacrylate(EHA) and 1,4-butanediol diacrylate(BDA) were used as components of ACR core,and methyl methacrylate(MMA)? 采用多步种子乳液聚合法合成了以BA、EHA、BDA为核组分,MMA、EA、BDA为壳组分的核-壳聚丙烯酸酯(ACR)乳液,制备了ACR存在下的氯乙烯(VC)接枝乳液共聚胶乳。
- Bromoxynil octanoate was synthesized from bromoxynil,octanoic acid and thionyl chloride in the solvent using DMF and N(C 2H 5) 3 as catalysts by one step reaction. 以DMF、三乙胺为催化剂,在溶剂中,用辛酸直接合成了溴苯腈辛酸酯,实现由酸合成酯的一步反应。
- The new process of preparing glycol polyglucoside by starch and glycol in the presence of an acid catalyst and a catalyst promoter through one step reaction has been studied. 研究了淀粉和乙二醇在酸性催化剂及助催化剂存在下一步直接合成乙二醇葡萄糖苷的工艺,考察了影响反应和产品性能的多种因素。
- The modified petroleum resin (MPR) were prepared by two step reactions firstly reacting petroleum resins with maleic anhydride, and then esterificating of the addition, products with isooctyl alcohol. 通过对石油树脂与顺丁烯二酸酐反应条件的考察,确定了其最佳反应条件。
- Homopiperazine was synthesized by using diethylamine as starting material via three step reaction of tosylation,cyclized and detosylation.The overall yield was 78%. 以乙二胺为初始原料,经磺酰化、环化、脱磺酰化3步反应合成高哌嗪,总收率可达78%25。
- METHODS l-ephedrine was synthesized by taking propiophenone as the starting material followed 4 steps reactions. 方法以苯丙酮为起始原料,经溴代、甲胺化、还原、拆分等反应制得l-麻黄碱。
- Alkyl polyglucosides were prepared from glucose and lauryl alcohol by one step reaction using p-toluenesulfonic acid and dodecyl benzene sulfonic acid as catalysts respectively. 分别采用对甲苯磺酸和十二烷基苯磺酸为催化剂进行了一步法由葡萄糖和月桂醇制备烷基糖苷的工艺研究。
- Methods:Cetirizine dihydrochloride were synthesized from piperazine hexahydrate and4-chlorobenzyl chloride by six steps reactions. 方法 :对关键的缩合反应进行了改进 ,以六水哌嗪和对氯氯苄为原料 ,经六步反应得到产品。
- Irone was obtained through three steps reactions with citral and acetone.Citral reacted with acetone in the base catalyst to give pseudoionone. 采用山苍子油提取得到的柠檬醛和丙酮等为主要原料合成鸢尾酮。
- IDENTIFICATION OF MULTIVARIABLE STEP MODEL BASED ON MULTI STEP TEST METHOD 基于多次阶跃法的多变量阶跃模型辨识
- 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
