查询词典 anhydrides

Compared with original process, the problems of the reaction of mixed acid anhydrides and hydrolyzation were solved. The improved process has high yield, low cost and is easy to operate, while the quality of products is much more stable and suitable for industrial production.

改进后的工艺新解决了原工艺酸酐反应不完全及水解等问题，操作简单、产品质量稳定、收率高、成本低、更适合工业化生产。

The degradation rates of copolyanhydrides were much slower than those of homopolyester anhydrides, and decreased with the increase of the ratio of CPP.

含Aspirin的均聚酸酐基质片的体外药物释放速率随时间逐渐加快，而共聚酸酐基质片的释放速率慢得多，且随CPP比例增大而降低，可保持一段时间的稳定释放速率。

LI J Z Chemical modification of wood by anhydrides without solvent or catalysts 10.1007/BF00776452 Wood Science , 2000,3

于志明%赵立木材染色技术的现状和发展趋势北京林业大学学报， 1998，5

Five parameters in the process, namely initial starch slurry concentration, pH, reaction temperature, reaction time and anhydrides concentration were investigated.

以轻度水解淀粉为原料，以取代度为衡量标准，采用单因素和正交试验方法研究湿法工艺制备辛烯基琥珀酸淀粉酯，从淀粉乳的初始浓度、pH、反应温度、反应时间和酸酐浓度五个方面研究辛烯基琥珀酸淀粉酯最佳制备工艺。

Phosphate esters and anhydrides play important roles in the biosynthesis of protein, they act as the activators and carriers of amino acids in the biochemica reactions, and go away as the leaving groups after the formation of peptide bond.

磷酸酯及其酸酐在蛋白质的生物合成中起着十分重要的作用，它们充当了氨基酸的活化试剂和运输载体，当肽键形成后又作为离去基团离去。

Methods Amoxicillin was synthesized from a main raw material 6-aminopenicillanic acid(6-APA) and acid anhydrides by nucleophilic substitution.

以6-APA为起始原料，工艺路线为6-APA胺盐溶液与混合酸酐反应得阿莫西林。

Peptides are traditionally synthesized in liquid phase, such methods are DCC, mixed anhydrides, acyl chloride and azide etc., which provide more choices for peptides synthesis.

传统的肽类合成多采用液相化学合成，常用的包括碳二亚胺法，混合酸酐法、酰氯法、叠氮物法等等，为多肽的合成提供了多种选择。

Esterification with some inorganic acid chlorides and anhydrides has been studied too, but with limited success only due to rather violent side reactions and an early precipitation of the reaction products.

同时也做过用无机盐酸及酸酐酯化的研究，但是只取得了有限的成功，只是因为相对剧烈的副反应及反应产物过早的沉淀。toommy：感谢参与，继续努力！亚太币+ 30 贡献+ 2

The principal products of Huicheng are organic anhydrides, amines and esters which can be used for LED (light-emitting diode), OLED, coatings, pesticides, synthetic, etc.

公司主要致力于研发、生产有机酸酐、有机胺和酯类，产品用于发光二极管、有机发光显示器、涂料、农药和合成树脂等。

The binding energies assigned to each of these peaks is in accordance with the accepted value for these functionalities [18,28]. The O–C_O high energy binding peak may include anhydrides, esters, and carboxylic acid groups, if present. The C1s spectrum of the 40W films could be fitted with a minimum of 5 peaks according to the above notations, as shown in Fig.

装订 被指定给每一个这些峰巅的能源是符合那为这些功能性〔18，28 的一般承认的价值。O－C_O 高的能源装订山顶可能包括醋酐，酯，和含有羧基的酸聚集，如果呈现。40W 的 C1s 光谱电影可能根据配备有 5 的最小量峰巅到那在记号法上面，如图 3 A 所示。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。