酸酐

The aluminum foils were galvanostatically etched in an aqueous solution of hydrochloric acid, sulfuric acid, sodium dichromate and hydrofluoric acid.

发现硫酸的添加主要是改善了溶液的钝化性能，铬酸酐的添加则不仅改善了溶液的钝化性能，而且减轻了阴极极化。

The working voltages were experimentally measured on-line at different reaction times under conditions of different temperatures, different current densities, and different initial anolyte concentrations in the electrochemical synthesis process of sodium dichromate and chromic anhydride from sodium chromate and sodium dichromate, respectively.

在线实验测得不同温度、不同电流密度、阳极液不同初始浓度时，铬酸钠电催化合成重铬酸钠和重铬酸钠电催化合成铬酸酐过程中不同反应时间下的工作电压。

The experimental results show that the electrochemical synthesis process of sodium dichromate from sodium chromate presents zero order reaction kinetic characteristics, and the electrochemical synthesis process of chromic anhydride from sodium dichromate presents first order reaction kinetic characteristics.

铬酸钠电催化合成重铬酸钠反应表现为拟零级反应动力学特征，重铬酸钠电催化合成铬酸酐反应表现为拟一级反应动力学特征。

Flame retardance and smoke suppression mechanisms of triphenyl phosphate and zinc stannate alone and together in the anhydride cured epoxy resin were studied by limited oxygen index, thermogravimetry analysis and NBS techniques.

采用极限氧指数法，热重分析和烟密度测试法研究了磷酸三苯酯、锡酸锌在环氧树脂酸酐固化物中的阻燃作用和抑烟机理。

The hemisuccination process and reaction kinetics of stigmasterol with succinic anhydride using toluene as a solvent,pyridine as a catalyst were studied.

研究了甲苯为溶剂，吡啶为催化剂，豆甾醇与琥珀酸酐的酯化反应工艺和反应动力学。

Some new sulfonamide derivatives possessing potent CA inhibitory properties act as effective in vitro tumor cell growth and metastasis inhibitors.

一些新型的磺胺类碳酸酐酶抑制剂可有效抑制体外多种肿瘤细胞系的生长和转移。

Two artificial antigens Bz_HS_protein and Bz_SO 2_protein have been synthesized by the succinic anhydride_carbodiimide method and the sulfonyl chloride method separately.

用琥珀酸酐－碳二亚胺法和氯磺化法合成了毕兹的两种人工抗原Bz＿HS＿protein和Bz＿SO2＿protein。

Treated by transesterification with methanol to 60% of the theoretical extent and esterified with maleic anhydride,then oxidized by air with supported metal stearate catalyst at 80 ℃ for 4-6 h and sulphited by sulphite,a novel combined sulphited fatliquoring agent is obtained from rape oil.

对菜油进行甲醇酯交换反应，反应程度控制在理论值的 6 0 %，然后用顺丁烯二酸酐酯化酯交换产物。这种酯化物在负载型金属皂的催化下，用空气进行氧化，温度 80℃，时间 4～ 6h。

Synthesis of terpinyl acetate from terpineol and acetic anhydride with solid superacid SO42-/TiO2 Ce4+as catalyst had been studied for the first time.

并以该固体超强酸SO42-/TiO2-Ce4+为催化剂，松油醇和乙酸酐为原料合成乙酸松油酯。

Besides, the derivatives were synthesized successfully by the similar acid binding agent system, such as tris(4-nitrophenyl) thiophosphate, tris(4-toluene)thiophosphate. The derivative of maleic anhydride was synthesized by the simple method, and its yield was above 90%.

采用类似的缚酸剂体系成功地合成了硫代磷酸三(4-硝基苯)酯、硫代磷酸三(4-甲基苯)酯，并用简单的方法合成了硫代磷酸三(4-氨基苯)酯的马来酸酐衍生物——硫代磷酸三(4-马来酸氨基苯)酯，产率达90％以上。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。