醋酸

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。

The process of esterification of propylene glycol monomethyl ether with acetic acid to synthesize propylene glycol monomethyl ether acetate is investigated using 98% sulfuric acid as catalyst.

研究了以浓硫酸为催化剂，丙二醇甲醚和醋酸酯化合成丙二醇甲醚醋酸酯的过程，考察了醚和酸比例、催化剂用量等因素对反应的影响，并选择甲苯为水萃取剂。

is that zinc acetate, sodium acetate and transition metal salt are dissolved in ethylene glycol monomethyl ether as precursor; then ethanol is added as stabilizer; after stirring, the stable sol is formed.

将醋酸锌、醋酸钠和过渡金属盐作为前驱物，溶于乙二醇甲醚中，并加入乙醇胺作为稳定剂，搅拌后形成稳定的溶胶。

Furthermore,using oxaldehyde,make the emulsion crosslinked and form a kind of net structure,thus a new kind of water-resistant adhesive is created.

通过醋酸乙烯酯共聚改性的方法，用醋酸乙烯与丙烯酸系单体共聚，采用无皂乳液聚合，然后用乙二醛交联，使乳液形成网络结构，制备了一种新型耐水性胶粘剂，研究了共聚单体对乳液性能的影响，并采用DSC、透射电镜等对乳液结构及性能进行了测试。

A new kind of non-formaldehyde water-resistant emulsion is prepared by modifying polyvinyl acetate with the surfactant-free copolymerization to polymerize vinyl acetate and the acrylic acid monomers,and then by using oxaldehyde to make the emulsion crosslinked to form a kind of net structure.

通过醋酸乙烯酯共聚的改性方法，用醋酸乙烯与丙烯酸系单体共聚，采用无皂乳液聚合，后用乙二醛交联，使乳液形成网络结构，制备了一种无甲醛的新型耐水性乳液。

A new catalytic spectrophotometry was established for the determination of trace silver based on the catalytic effect of Ag on the oxidational discoloration reaction of methyl violet with potassium persulfate in buffer medium of HAc-NaAc including phenothroline as activator.

在醋酸－醋酸钠缓冲介质中，有活化剂邻二氮菲存在时，Ag对过硫酸钾氧化甲基紫褪色反应有催化作用，建立了测定痕量银的新催化光度法。

In a large test tube, dissolve 0.5 g (4.5 mmole) of semicarbazide hydrochloride and 0.5 g of anhydrous sodium acetate (or 0.8 g of sodium acetate trihydrate) in 4 mL of distilled water and 7 mL of ethanol.

在一个大试管中，用4 mL蒸馏水和7 mL乙醇溶解 0.5 g (4.5 mmole)的胺基氢氯酸盐和0.5 g无水醋酸钠(或0.8 g的三水合醋酸钠)。

Methods: The various animal models including writhing experiment in mice, rat's toes swelling induced by carrageenan and the increase of capillary permeability in mice induced by acetic acid, were used to determine the effects of compound sparganium stoloniferum capsules.

建立多种动物模型，通过对醋酸所致小鼠扭体反应、角叉菜胶所致大鼠足肿胀、醋酸所致小鼠腹腔毛细血管通透性影响等试验，研究复方三棱胶囊的药理和毒理作用。

The Company has been established for 20 years, and is continuously specialized in precise galvanization, coupling and lead frame galvanization, printed wiring board galvanization, hardware galvanization, nickel cobalt alloy electrolytic casting, profession products, and aluminum material surface treatment etc. Products include thionamic nickel sulfamate, cobalt sulfamate, nickel carbonate basic, cobalt carbonate basic, nickel acetate, and cobalt acetate etc.

公司成立20年来，一直为精密电镀、连接器与引线框架电镀、印刷电路板电镀、五金电镀、镍钴合金电铸、铝材表面处理等行业产品提供高品质的氨基磺酸镍、氨基磺酸钴、碱式碳酸镍、碱式碳酸钴、醋酸镍、醋酸钴等产品。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。