| 单词 | substitution |
| 释义 | substitution [英 [?s?bst?'tju:?n] 美 [?s?bst??tu??n, -?tju-] ] substitution的意思、解释 复数形式：substitutions; substitution 基本解释 名词替换; 代替; 代用; 取代（作用） substitution 相关例句 名词 1. We use saccharin in substitution for sugar. 我们用糖精代替糖。 substitution 网络解释 1. 取代：凑之运用 6.取代(Substitution)运算元之介绍及运用 7.档案输入输出(File Input/Output)及函式库(Subroutines)之建立 8.Summary of 回圈控制结构(Loop ...(课程大纲) LPI 201: .Linux核心 (Kernel) 的客制化及模组相关深入探讨 .Linux核心的编译方式及过程与升级方法 .功能强大的Automounter, substitution 双语例句 1. substitution是什么意思 1. It is noted that the effects of substitution on the C-Cl BDE of substituted chlorobenzene compounds are very insignificant. 研究了目标化合物的前线轨道能级差，并对取代氯苯化合物的热稳定性做了评估。 2. The proposed basis transformation approach from Galois Field (28) to Galois Field (24) can significantly reduce the hardware complexity of the Substitution Byte function. 根据所提出将基底从伽罗瓦场(28)转换至伽罗瓦场(24)方法，能够大大的减少取代位元组函数的硬体复杂度。 3. In order to overcome these drawbacks, two methods are mainly employed: substitution and surface modification. 为了克服这方面的缺点，目前主要有两种改进手段：体相掺杂和表面包覆。 4. substitution什么意思 4. The intrinsic viscosities, , of three sodium cellulose sulfate samples, with known molecular weight and Degree of Substitution=1, were determined at 25℃ under different ionicstrengths, I, of NaCl. vs. and logs vs. 本文测定了已知分子量的纤维素硫酸半酯钠盐在不同离子强度NaCl溶液中，25℃的特性粘数，确立了与此相对应的与1/I1/2和logs=△/△(I-1/2与 log0.1的线性关系。 5. substitution的翻译 5. Comprehend the mechanism of carbonyl alpha-substitution reactions and condensation reactions. 理解羰基取代反应及缩和反应之机制。 6. substitution的反义词 6. It has been found that the nutritional value of soybean capsules is the same as that of the corn when feeding cows. In recent years, conclusion is drawn which it has determinate effect that appropriate soybean capsule are added into the diet of enceinte sows, and it has no negative effect substitution of soybean husks for wheaten bran in feeding enceinte sows. Nevertheless, no report on the use of soybean husks in feeding growth-finishing pigs. It slows down the use of soybean husks in animal breeding. 据报道大豆皮用于奶牛其营养价值等同于玉米，近年来，人们为了使大豆皮更广泛的应用于畜牧生产，在怀孕母猪日粮中适当添加饲喂，得出了有效的结论，并表明用它来替代麸皮饲喂怀孕母猪对其生产无任何负面影响，但是迄今为止，大豆皮是否能用于饲喂生长肥育猪还未见报道，这就妨碍了大豆皮在畜牧生产中的广泛应用。 7. Normal sudiom injected submucous colonal adenoma under therapeutic endoscopy can prevent tresis effectively and reduce bleeding and avoid the complications of adnephrin. Normal sodium can be a substitution of normal sodium and adnephrin. 在大肠腺瘤的内镜治疗中单纯使用生理盐水作为黏膜下注射液，既能有效地预防穿孔，又能减少出血情况，尚可避免肾上腺素的并发症，可以取代肾上腺素生理盐水。 8. Metonym: The substitution of one term for another with which it is commonly associated or closely related. 一般来说，不可数名词用动词单数，可数名词复数用动词复数。 9. According to the data from the substitution reaction, the catalytic function of the phosphonium salts and the chiral quaternary ammonium salts has been compared. The followings are the main work of my paper. 1. It summarized the development of asymmetric synthesis and the latest studies of phase transfer catalyst; 2. Use PPh3 as the starting material, by the reaction of quaterization we get four common phosphnium salts as PTC-1、PTC-2、PTC-3、PTC-4; 3. Use L-Valine as the starting material, by the reaction of esterification, neutralization and quaterization, we get three chiral quaternary ammonium salts as PTC-5、PTC-6、PTC-7; ` 4. Use L-Valine as the starting material, through the reaction with Methyl chloroformate in order to protect the –NH2, and then react 本论文主要工作包括以下几个方面：1、综述了不对称合成的发展历程及相转移催化剂的进展和最新研究成果； 2、以三苯基磷为起始原料，合成了PTC-1、PTC-2、PTC-3、PTC-4 等四种普通的季鏻盐相转移催化剂； 3、以L-缬氨酸为起始原料，经过酯化、中和、季铵化等步骤，合成了PTC-5、PTC-6、PTC-7 等三种手性季铵盐相转移催化剂； 4、以L-缬氨酸为起始原料，用氯甲酸甲酯保护氨基，与L-苯丙氨酸甲酯反应，合成了一个环状二肽——2，5-二酮哌嗪环类化合物，它是一类新型的相转移催化剂； 5、对合成过程中涉及的产物和中间体用1HMNR、IR、EA 进行了系统的表征和分析； 6、将制得的催化剂PTC-1—PTC-7 应用于亲核取代反应，将PTC-8 应用于亲核加成反应，验证了催化效果； 7、根据实验结果及相关原理，探讨了PTC 的诱导机制。 10. Density Functional Theory method was used to optimize the geometries of 209 PCDE molecules, 209 PBDE molecules and 75 PCDD molecules at the B3LYP/6-31G* level. Using computed structural parameters as theoretical descriptors, the forward stepwise multiple regression technique was adopted to obtain QSPR models of environmental partition properties for these POPs by using GQSARF 2.0 and SPSS12.0 for windows programs. The obtained QSPR models are as follows:(1) QSPR models for predicting subcooled liquid vapor pressure, n-octanol/water partition coefficients lgK_(ow and subcooled liquid water solubilities -lgS_(w, l of PCDEs, of which correlative coefficients (R~2) are 0.988, 0.958 and 0.959 and the root-mean-square-error of estimation are 0.134, 0.116 and 0.327 respectively.(2) QSPR models of lgPL and n-octanol/air partition coefficients lgK_(oa for PBDEs, which both contain three structural parameters. The values of R2 for the two models are both 0.997 while the values of RMSEE are 0.073 and 0.062 respectively.(3) QSPR models of lgKow and–lgS_ for PCDEs, which both have one variable (mean molecular polarizability, α). The values of R~2 for the two models are 0.978 and 0.866 and the values of RMSEE are 0.300 and 0.270 respectively.(4) The molecular structures of 24 substituted naphthaline compounds were optimized using Hartree-Fock and DFT methods at four different levels and the same means was used to obtain four three-parameter (EHOMO, q~+ andα) QSPR models of lgK_. The model at the HF/6-311G** level is the best one of which R2 is 0.9662 and RMSEE is 0.380.(5) QSPR study for environmental partition properties of PCDEs was also performed using position of Cl substitution method in which simple parameters of substitution position were taken as descriptors. The multiple linear regression was performed with GQSARF 2.0 and SSPS 12.0 for windows programs to obtain QSPR models of lgP_L, lgK_ and–lgS_ for PCDEs of which R~2 are 0.991, 0.983 and 0.965 and RMSEE are 0.311, 0.100 and 0.300 respectively. 采用密度泛函理论方法在B3LYP/6-31G*水平上对PCDEs、PBDEs和PCDDs的分子结构进行了全优化计算，以计算得到的量子化学参数作为理论描述符，采用GQSARF 2.0和SPSS 12.0 for windows统计程序进行正向逐步回归分析，建立了这些POPs的环境分配性质的QSPR模型：(1) PCDEs的过冷液体蒸汽压、正辛醇/水分配系数lgK_(ow和水溶解度-lgS_(w，l的QSPR模型，这3个QSPR模型的相关系数(R2)分别为0.988、0.958和0.959，估计的均方根误差分别为0.134、0.116和0.327；(2) PBDEs的lgPL和正辛醇/空气分配系数lgK_(oa的QSPR模型，这两个模型都包含三个分子结构参数，其R~2都为0.997，RSMEE分别为0.073和0.062；(3) PCDDs类化合物的lgK_和-lgS_w的QSPR模型，两个模型都只含一个变量，其R~2分别为0.978和0.866，RSMEE分别为0.300和0.270；(4)采用Hartree-Fock和DFT方法，在4种不同水平上优化计算了24个取代萘系列化合物的分子结构，采用上述同样的方法分别建立了四种水平上的三变量lgK_模型，通过比较得到，在HF/6-311G**水平计算得到的模型最好，R为0.966，RSMEE为0.380；(5)同时，采用氯原子取代位置方法对PCDEs的环境分配性质进行QSPR研究，建立了PCDEs的lgPL、lgK_和-lgS_的QSPR模型，其R~2分别为0.991、0.983和0.965，RSMEE分别为0.110、0.100和0.300。 11. 11. The lattice parameters a and c decrease with Li substitution. 随着Li的掺入，晶格常数a和c都减小。 12. Methods Starting with γ-butyrolactone, followed by cyclization, chlorination, substitution, etherification, and aminomethylation, 7-anilino-5-methyl-2-3-(5-(substituted-aminomethyl furan-2-yl methylthio propyl [1, 2, 4] triazolo [1, 5-a] pyramidine type of compounds were synthesized and their antitumor activities were evaluated with Bel-7402 and HT-1080 in vitro using cisplatin as control. 以γ-丁内酯为起始原料，经环合、氯代、取代、硫醚化和氨甲基化等反应合成7-苯基氨基－2-［3-（5-取代氨基甲基－呋喃－2-基－甲硫基）丙基］-5-甲基－[1，2，4]三氮唑并[1，5-a]嘧啶类化合物。采用MTT法，以顺铂为阳性对照药，以Bel-7402和HT-1080为测试细胞株对目标化合物的抗肿瘤活性进行了评价。 13. substitution 13. It should be noted that it is common in our country for a 100% transfer to occur and no substitution to occur. 应该注意的是，在我们国家100%转让而不替换单据的情况是经常发生的。 14. substitution的反义词 14. The influence of the use level of base and monochloroacetic acid on the degree of substitution in CMS, the influence of DS and H/Na(ratio of free and salified carboxylic acid in CMS)on swelling and disintegrating of CMS have been discussed. 考察了碱和一氯乙酸用量对CMS取代度的影响及DS和CMS中游离羧基和成盐羧基比对崩解剂吸水溶胀性能的影响。 15. Up to now there are few in-situ checking instruments except some substitution items inspection tools, for example big-module base pitch gauges and common normal micrometers. It is almost a gap to control and improve the geometrical accuracy of large-scale gears by in-situ checking. 当前，除大模数基节仪和公法线千分尺等代用项目的检测量具之外，有效的临床检测手段极少，通过在位测量大齿轮几何精度来控制和提高其制造精度几乎还是空白。 16. In this study, a chromosome segment substitution lines population, derived from Asominori /IR24 with Asominori as the recurrent parent, was planted and phenotyped for nine rice-eating-quality traits in three successive years. 随着人民生活水平的提高，对优质稻米的质量和数量都提出了更高的要求，品质改良成为目前水稻育种的重要目标，也是水稻研究的热点和难点问题。 17. Objective To compare the difference in molar substitution of hydroxyethyl starch 130 injection determined with two different methods. 摘要目的比较2种不同方法测定的羟乙基淀粉130的置换度的差异。 18. They are developing a new medicine in substitution/place of that one. 他们正在研制一种该药的替代品。 19. There are certain conditions in the employment of verbal substitution and ellipsis, which need us to explore. 目前，在英汉语对比中有关动词性替代和省略的研究多限于对这两种形式的概念性描述。 20. substitution的反义词 20. Instead, there are also ways of substitution in Chinese texts. 在评估替代词时，语法化是一个重要标准。 substitution 单语例句 1. Conventional ways of cleaning soils contaminated with toxic substances include chemical washing and the substitution of new soil. 2. " My fitness has never been a problem and I feel really good, " Rooney told the FA's website after being clearly frustrated at his substitution. 3. The substitution of paper money for precious metals historically made commercial transactions more efficient, but nowadays paper itself is a costly inconvenience in the payment system. 4. The middle phase of virus evolution was marked by the " super - spreader case " and a slower amino acid substitution rate and high infectivity. 5. According to relevant international law, such a regime substitution altered neither China's sovereignty nor its territory. 6. Dunga also anticipated Kaka's substitution as he has not played a full match in the last five matches. 7. The oral methadone substitution program around the country is the only therapeutic strategy that has proven effective. 8. But for larger or very large constituencies with several seats, the replacement or substitution method may be more reasonable. 9. Two minutes later Real Madrid coach Manuel Pellegrini made a double substitution, replacing Ronaldo and Benzema with Arjen Robben and Gonzalo Higuain. 10. The second thing that's wrong with using carbon intensity is that it cannot measure the substitution effects between energy and other factors. |
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