查询词典 molar quantities

In the presence of 1b,1c,or 1d(5%,molar fraction),chalcone was stereoselectively epoxidized by sodium hypochlorite with yields range from % to 92% and ee range from 58% to 63%.

以次氯酸钠为氧化剂时，化合物1b、1c和1d可不对称地催化查尔酮的环氧化反应，ee值58%~63%，产率%~92%。

Methods The Chatillon force measuring instrument was used to record the retention of gold alloy casting Akers clasps when they were dislodged from the undercuts of different depths (0.25 mm, 0.375 mm, 0.50 mm and 0.75 mm) on the premolar and molar. All data were analyzed by ANOVA.

采用Chatillon测力仪，测定临床常用金合金铸造三臂卡在磨牙和前磨牙的0.25、0.375、0.50、0.75 mm倒凹深度上的固位力，同时进行统计学分析。

The influence of reaction condition on the yield of isopropyl chloroacetate as investigated such as catalyst loading, molar ratio of chloracetic acid to isopropanol, reaction time and repeated use of the catalyst.

考察了催化剂的用量、反应物物质的量比、反应时间和催化剂的重复使用等因素对收率的影响。

As concerning synthesis of 2-ethylhexyl chloroacetate, effects of catalyst dosage, molar ratio of 2-ethylhexanol to chloroacetic acid, reaction time, dosage of water entrainer on esterification rate were studied.

将此固体超强酸酯用于氯乙酸和异辛醇合成氯乙酸异辛酯的酯化反应，考察了异辛醇和氯乙酸的摩尔比、催化剂用量、反应时间、带水剂环己烷的用量对酯化反应的影响。

The optimum synthetic conditions of ethyl chloroacetate are: molar ratio of chloroacetic acid to ethanol is 1:8, the quantity of catalyst[Fe2(SO4)3 xH2O] is 10% of the mass of chloroacetic acid, reaction time is 1 hour, 5A zeolite was used as dehydrating agent. In these conditions, the yield of ethyl chloroacetate was up to 73%.

用Fe_2(SO_4)_3·xH_2O作为催化剂合成氯乙酸乙酯的较佳反应条件是：酸醇物质的量之比为1：8，催化剂用量为氯乙酸质量的10％，以5A分子筛作为脱水剂，回流时间1h，收率达73％以上。

Gold nanoparticles were prepared with chemical reduction method and the size was controlled via adjusting the molar ratio of citric acid to chloroauric acid.

采用柠檬酸钠还原氯金酸法制备金溶胶，以正硅酸乙酯为硅源，氨水作催化剂，制备以金为核，二氧化硅为壳的核壳纳米粒子。

In the buffer solution of HAc-NaAc at pH 3.5, Cr reacts with chrysin by molar ratio 1:3, and forms a highly fluorescent active complex in the presence of some methanol. The maximum excitation and emission wavelengths of the complex are 260 nm and 429 nm respectively.

在含一定量甲醇的pH=3.5的HAc-NaAc缓冲溶液中，铬与白杨素能形成1：3的二元荧光配合物，其最大激发波长和发射波长分别为260 nm和429 nm。

Results: The optimum conditions were found to be as follows: the molar ratio of isoamyl alcohol to cinnamic acid was ...

对甲苯磺酸是合成肉桂酸异戊酯的良好催化剂，具有实际应用价值，该实验合成工艺简单，酯收率较高。

With the molar ratio of cobaltous nitrate, phenanthroline and Pyridine-3,4-dicarboxylic acid is 1∶2∶1,under the condition of pH=5,heating at 50-60℃ and stirring,the ternary complex of cobalt is synthesized in the methanol solution.

将硝酸钴、邻菲罗啉和3，4-二羧基吡啶按1∶2∶1物质的量比计量，在pH=5和50-60℃加热搅拌的条件下，在甲醇溶液中合成了钴的三元配合物，用元素分析、红外光谱、紫外光谱、热重分析和摩尔电导率对配合物进行表征，结果表明该配合物为1∶1型电解质，其组成为[CoⅢ2]NO3.H2O，其中Pydc=

In chapter 5, the thermodynamics of three kinds of PPP-based carbons, namely 650℃、700℃、900℃ PPP-based carbons, are examined with columbic titration method and the partial molar enthalpy and partial entropy as a function of intercalated lithium concentration are calculated.

以650℃PPP碳材料为例，对库仑滴定曲线进行了理论分析，指出当01时嵌入电极的电极电位和锂的嵌入比浓度之间符合Nernst方程。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。