查询词典 tartaric acid

A new collector with chelate-ability,diphenyl α-(3-phenylthioureido) alkanephosphonate,is synthesized,and the collecting performance for cerussite ,calcite and quartz,and the relationship between property and structure are investigated, and the depressor function of pyrogallic acid are also studied.

合成具有螯合性能的新型捕收剂———-α(3-苯基硫脲基)烃基膦酸二苯酯，研究该系列化合物对白铅矿、方解石和石英的捕收能力以及结构和性能的关系，并考查焦性末食子酸的抑制作用。

Unsaturation in the fatty acid chain is the most significant factor causing lower cetane number.

脂肪酸链中的不饱和键是导致CN下降的最重要因素。

The influence of acrylic acid and cetane alcohol,amount of catalyst and inhibitor,reaction temperature,reaction time were investigated.

实验结果表明，合成的最佳反应条件为：丙烯酸与十六酯的物质的量之比为1.2∶1，对甲苯磺酸的用量为0.6%，对苯二酚的用量为0.4%，反应温度为110℃，反应时间为5 h。

The second structure and the amino acid sequence of TasA protein were predicted by using the softwarerhttp://npsa-pbil.ibcp.fr/cgi-bin/secpred mlr.pl.

利用http：//npsa-pbil.ibcp.fr/cgi.bin/secpred_mlr.pl在线分析预测了TasA基因的氨基酸序列和二级结构特征。

Fatty acids, more importantly, the positional isomers, were identified by applying equivalent chain length values based on even-chain saturated fatty acid methyl ester standards.

以线性程序升温等当碳长度值结合标准品对照的方法对17种脂肪酸定性，用面积归一化法定量。

The increase of distribution ratio may be conduced by the nonpolar group in branch chain of amino acid.

氨基酸的支链结构中含有非极性基团将导致其分配系数的增加。

Fatty acids (chains of carbon atoms with hydrogens attached and an acid group at one end) with one double bond.

单不饱和脂肪酸：带有一个双键的脂肪酸（带有一个氢原子和羧基末端的碳原子链）。

Moreover, the size of the molecule and steric hindrance showed obvious effects on the interaction, while the configuration, sequence and length of carbon chains (increasing 1～2 C) of amino acid residue in the phosphoryl oligopeptides showed little effects on the interaction under ESI-MS conditions.

磷酰化二肽中氨基酸残基的构型、顺序、碳链长短的变化(增加1～2个C)对其与蛋白溶菌酶之间的相互作用在质谱中没有表现出影响。

Novel sulfonic acid and carbon chains of mixed-mode packing materials were synthesized through sulfonating polymer-encapsulated zirconia covered by a porous copolymer of olefinic hydrocarbon and divinylbenzene on its surface.

通过共聚交联方法将长链碳烯-苯乙烯包覆到锆胶表面上，得到聚合物包覆固定相，再对该填料进行磺化引入离子官能团到聚合物表面，得到混合型固定相。

The main work as follow: 1. The precursor of W-Cu composite powders was prepared by chemical coprecipitation using tungstenic acid and chalcanthite.

以黄钨酸和五水硫酸铜为原料，用化学共沉淀法制备钨铜复合粉前驱体粉。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。