查询词典 acetates

The effects of reaction time and acetic anhydride/anhydroglucose unit molar ratio on the DS of starch acetates were investigated.

考察了反应时间和酰化试剂用量对酰化程度的影响。

In this study, we carried out the allylation of anilines with allylic acetates in PEG-H2O system in the presence of palladium as catalyst. N-allylation of anilines was achieved.

在本研究中，我们完成利用钯催化剂，在水及聚乙二醇系统中，使苯胺类和乙酸烯丙酯类进行烯丙基化反应，并探讨各苯胺类反应物之结果。

Hear two unissued 1950s acetates!

听到两个未发行1950醋酸！

The spectra of X-ray diffract revealed that its crystal is B type and the value is about 18%, far lower than that of ordinary maize starch. With the method of chemistry modification, we modified the amylose starch with acetates. The result showed that the best reaction condition was at the ratio of 1:5.3 (glucose: acerbity), with MSA 1.5% catalyzer, at 75℃ for 3 h.

利用化学改性法对高直链玉米淀粉进行醋酸酯化改性，最佳反应条件为，淀粉葡萄糖基与酸的质量比1：5.3、催化剂甲磺酸用量为体系的1.5%、反应温度75℃、反应时间3 h，在此条件下可制备取代度为2.84的醋酸酯淀粉，比普通玉米淀粉高0.78。

By means of FTIR,SEM,DSC,TGA and XRD,we studied the microstructure,particle shape,meltage temperature,decomposition temperature and crystal degree,and gained better understanding about influences of different degrees of substitution on microstructure and thermal property of starch acetates.

用傅立叶红外、扫描电镜、差示扫描量热、热失重和X射线衍射测试技术对淀粉醋酸酯的结构、形貌、熔融温度、分解温度和结晶度进行表征，分析了不同取代度对醋酸酯淀粉的热性能及其结晶结构的影响。

H2SO4. By means of FTIR, SEM, DSC, TGA and XRD, we studied the microstructure, particle shape, meltage temperature, decomposition temperature and crystal degree, and gained better understanding about influences of different degrees of substitution on microstructure and thermal property of starch acetates.

用傅立叶红外、扫描电镜、差示扫描量热、热失重和X射线衍射测试技术对淀粉醋酸酯的结构、形貌、熔融温度、分解温度和结晶度进行表征，分析了不同取代度对醋酸酯淀粉的热性能及其结晶结构的影响。

Its salts and ester s are acetates.

它的盐和酯是醋酸盐。

These starch acetates exhibited different solubility in water,acetone and DMAc,depending on the DS value.

不同取代度的酰化淀粉在水、丙酮和DMAc等溶剂中表现出不同的溶解性。

Acetates are important in the biochemical synthesis of fat s from carbohydrates in plants and animals.

醋酸盐在从动植物碳水化合物中提炼脂肪类生化合成物方面很重要。

Results:DMY acetates could be synthesized effectively using phosphoric acid as catalyst,the antioxidation effect of DMY acetates were better than DM...

结果：用磷酸作催化剂，可有效地合成二氢杨梅素酯，所合成的化合物均有较强的抗氧化能力。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。