查询词典 dibasic carboxylic acid

The major acid detected in the apple rhizosphere and the wormcast was oxalic acid, malic acid, tartaric acid, succinic acid and malonic acid, one of highest content was oxalic acid.

苹果根际和蚯蚓粪中检测到的有机酸主要有草酸、苹果酸、酒石酸、琥珀酸和丙二酸，以草酸含量为高。

Kinds of commercial milk powder were analysed with GC-MS in order to learn about their fat acid compose,and the result illuminated that there were 28 kinds of fat acids were detected in all samples,and only octanoic acid and decanoic acid were detected from 4 kinds of season fat acids of hexanoic acid, octanoic acid ,nonanoioc acid and decanoic acid.

用气质联用色谱分析了11个商业奶粉样品的脂肪酸组成以及含量，每个样品均检测到了28种脂肪酸，在表现奶粉风味的4个呈味脂肪酸，也即辛酸、己酸、壬酸和葵酸中只检测到了辛酸和葵酸。

Crystal by DTT into the protoxin with an end amino group; activation and derivation of abamectin to form abamectin-COONa with a carboxylic group; final bioconjugation by using amino-carboxylic conjugator EDC to achieve the substance combination of two biotoxins.

晶体进行酶解改造，形成带末端氨基的原毒素；将阿维菌素的羟基进行激活、衍生化，形成带羧基的阿维菌素衍生物（Abamectin-COONa）；再利用氨基-羧基偶联剂进行两种生物毒素的生物耦合。

Taking into account the fact that there is synergistic combination of the mixture stabilizer of the carboxylic ester rare earth salt and organotin mercaptide in thermal stabilization of PVC, we consider it more practial to replace partically the organotin mercaptide by the carboxylic ester rare earth salt.

特别是部分替代有机硫醇锡可发挥它们之间的协同效应，更具有实用性。

Multilayer latex particles with carboxylic polymer as core, polymer with low glass transition temperature and film-formable under room temperature as shell, and lightly crosslinked polymer as intermediate layer were prepared with unsaturated carboxylic monomers by multistage seed emulsion polymerization. Finally, the room-temperature-film-formable polymer particles with hollow structure were obtained via the alkali treatment to the multilayer latex particles.

采用羧基单体进行多阶段的种于乳液聚合，制备了内核为带羧基的聚合物、最外层为易成膜的低玻璃化温度聚合物、中间为轻度交联中间隔离层的多层核壳结构乳胶粒，最后通过碱处理制成了具有室温成膜性的中空结构聚合物微粒。

A weak soluble dibasic acid (the parent acid of cyanamide salts).

一种水溶性弱酸，氰胺盐的母酸。

Factors of esterfication of mixed dibasic acid were studied: alcohol acid mol ratios, the content of the catalysts, the reaction time and the content of water carrier.

实验考察了混合二元酸酯化的影响因素：醇酸摩尔比、催化剂用量、反应时间以及带水剂的种类和用量对酯化率的影响。

In chapter four, molecular imprinting polymers against amino acid derivatives utilizing 2-VP+AM as combined functional monomer and trimethylolpropane trimethacrylate as tribasic cross-linker were prepared and result was compared with those with the same amino acid derivative as the imprinted molecules utilizing ethyleneglycol dimethacrylate as dibasic cross-linker. It was found that cross-link intensity of the molecular imprinting polymer is higher when TRIM was utilized and baseline separation for the imprinted molecule could be achieved. When TRIM was utilized as cross-linker more molecule is imprinted during the polymerization.

第四章采用2-乙烯基吡啶+丙烯酰胺复合功能单体，考察了三元交联剂三甲氧基丙烷三甲基丙烯酸酯烙印氨基酸衍生物的情况，并与二元交联剂乙二醇二甲基丙烯酸酯烙印相同氨基酸衍生物的情况进行了对比，发现三甲氧基丙烷三甲基丙烯酸酯交联剂在较小的用量下就可使分子烙印聚合物达到足够的交联度，实现烙印分子的基线分离。

For example, an objective polyester can be produced in a method of producing an ester comprising, a first step wherein a diol is reacted with an ester produced beforehand from a dibasic acid and a monofunctional alcohol, or an ester produced beforehand from a monofunctional alcohol and diol, a second step wherein unreacted ester is separated from the product produced in the first step to obtain another ester, and a third step wherein unreacted ester separated in the second step is recycled to the first step, 0.05-5 millimoles of the catalyst relative to one mole of acid being used in said first step.

例如，可以应用制备酯的方法制备目的聚酯，包括，第一步，使二醇与产生的酯反应，该酯由二元酸和单官能团醇预先制得，或由单官能团醇和二醇预先制得；第二步，将未反应的酯与第一步所制得的产物分离，得到另一种酯；第三步，将第二步中分离出的未反应的酯循环回到第一步中，在第一步中相对于1摩尔酸来说，应用了0.05-5毫摩尔所述的催化剂。

The novel long carbon chain fused ring semi-aromatic nylon PA12N takes the long carbon chain aliphatic diamine 1, 12-twelve carbon diamine and fused ring aromatic serials dibasic acid 2,6-naphthalenedicarboxylic acid as raw materials and is made by the processes of salifying, prepolymerizing and polymerizing after solid phase.

它以长碳链的脂肪族二元胺1，12-十二碳二元胺和稠环芳香族二元酸2，6-萘二甲酸为原料，经过成盐、预聚合、固相后聚合制得。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。