乙酸的

On the basis of the development of a new CE method for the analysis of α-lactalbumin,β-lactoglobulin A and β-lactoglobulin B, different concentrations of acetic acid and trichloroacetic acid for the removal of proteins in raw milk, infant formula A and B, and yogurt were investigated.

建立了毛细管电泳法分析α-乳白蛋白、β-乳球蛋白A及β-乳球蛋白B的方法，考察了不同浓度冰乙酸及三氯乙酸对原料奶、婴儿配方奶粉A和B及酸奶中蛋白的去除效果。

The surface hydroxyl group onto magnetic polyvinyl acetate nanoparticles can be obtained by saponification reaction on their surface.

结果表明，磁性聚苯乙烯颗粒与丁二酸酐发生Freidel-Crafts酰基化反应，可以在颗粒表面引入少量羧基；磁性聚甲基丙烯酸甲酯颗粒分别与乙二醇、二缩三乙二醇、聚乙二醇等发生醇-酯交换反应，可以在颗粒表面接枝不同分子链长度的末端羟基；磁性聚醋酸乙烯酯颗粒经过醇解或皂化反应可以获得表面羟基；磁性聚丙烯酸甲酯颗粒通过乙二胺或1，6己二胺的胺解反应可以得到表面氨基，继而与一氯乙酸反应可以引入亚胺二乙酸基团。

And Cucumis sativus L. were tested by bioassay-guided separation. The extracts from P. tomentosa flower with ethanol were extracted with petroleum ether, ethyl acetate and n-butanol. The inhibition rate of the ethyl acetate extract to growth of the 3 kinds of plant radicel were 99.89%, 63.53% and 32.74% respectively at 0.5 mg/mL concentration, and that of petroleum ether were 76.30%, 56.17% and 23.36%.

绒叶泡桐Paulownia tomentosa花乙醇提取物依次用石油醚、乙酸乙酯、正丁醇和水萃取后进行活性测定，结果表明，石油醚萃取物在浓度为0.5mg/mL时，对反枝苋、生菜和黄瓜种子胚根生长的抑制率分别为76.30%、56.17%和23.36%；乙酸乙酯萃取物在浓度为0.5mg/mL时，对反枝苋、生菜和黄瓜种子胚根生长的抑制率分别为99.89%、63.53%和32.74%。

Objective: To investigate the effection of ethyl acetate extract of sappanwood on T lymphocyte subset to discuss the resist function and possible mechan.

目的：通过观察苏木乙酸乙酯提取物对小鼠T细胞亚群的影响，探讨苏木乙酸乙酯提取物的免疫抑制作用机制。

The best disinfection methods should be selected to achieve tetter water quality in biological stability and DPBs, Chloramination (chlorine to ammonia by 3:1) results less DBPs and AOC formation (HAAs by 90%, THMs by 70%, AOC by 10% respctively).

氯胺消毒在对消毒副产物卤乙酸和三卤甲烷以及 AOC 的影响方面均优于氯消毒，特别是消毒副产物，采用氯氨比3： l 比例时卤乙酸下降约90％，三卤甲烷下降70％，对提高饮用水水质有很好的作用。

Cellulose diacetate and cellulose triacetate, for example, are not attacked by microorganisms because most of the hydroxyl groups have been converted to acetate groups.

比方说由于大部分的羟基已经被转化成了醋酸基，双乙酸纤维素和三乙酸纤维素就不再受微生物的侵蚀。

A vinegary smell is caused by acetic acid, while a nail polish aroma reflects the formation of ethyl acetate.

葡萄酒中也会闻到破败气味。像醋气味是由乙酸造成的，而指甲油味是由乙酸乙酯形成的。

AbstractAIM: To study the occurrence of ocular surface diseases on staffs working in operating room and to investigate the relation between xerophthalmia occurrence and peroxyacetic acid contiguity.

目的：观察与过氧乙酸有密切接触人群的眼表情况，来分析过氧乙酸接触对干眼症发病率的影响。

Objective To determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of Edaravone, by gas chromatography.Methods Sample solution was injected on a GDX column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.The residue was calculated by the external standard method.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量方法：采用固定相二乙烯苯乙基乙烯苯型高分子孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。

The invention also relates to a preparation method of the selective infrared absorption material of the amino adipate with the intercalation structure, which is characterized in that hydrotalcite LDHs is taken as a precursor, and organic matter of aminoacetic acid is intercalated between the hydrotalcite LDHs layers by an ion-exchange method and then assembled to obtain the IDAs-LDHs with a good crystal phase structure and excellent performance.

本发明还涉及该氨基二乙酸插层结构选择性红外吸收材料的制备方法，以水滑石LDHs为前体，采用离子交换法将氨基乙酸类有机物插入到LDHs层间，组装得到晶相结构良好、性能优异的IDAs-LDHs。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。