乙酸

Resin transfer molding mould was manufactured with bisphenol-A epoxide vinylester resin as matrix,poly as low shrinkage additive and glass fiber tricot as reinforcing material,according to the basic requirement of matrix resin of RTM mould.

根据树脂传递模塑模具对基体树脂的基本要求，选用双酚A环氧乙烯基酯树脂为基体，聚乙酸乙烯酯为低收缩添加剂，玻璃纤维经编织物为增强材料，并加入相应的助剂，制备了复合材料RTM模具。

Beet alkali was synthesized from trimethylamine and chloroacetic acid .

以三甲胺及一氯乙酸为原料合成甜菜碱。

Turbidimetry was selected as analytical methods for the determination of cysteine in untreated hair and treated hair.

研究头发冷烫试剂巯基乙酸浓度与相应头发表面产生的半胱氨酸量之间的关系。

The experimental process was as follows: a set of 5 immobilized copper ion affinity membranes were loaded into a column, uncombined copper ion was removed with 5 mL of sodium phosphate-citric acid buffer (pH 7); the Hb sample volume was 2 mL, and uncombined Hb was eluted with 10 mL of the buffer.

中文内容：摘要：将纤维素滤纸进行碱处理及环氧活化、偶联亚氨基二乙酸、固定化铜离子等处理，并将其装入自制的色谱柱管，制得固定化铜离子亲和膜色谱柱。

For the acidified wastewater, calcium precipitation occurred mainly on the granular sludge surface; for the unacidified wastewater, accumulation occurred in the core of granular sludge, and for the unliquefied wastewater, precipitation evenly distributed within the granular sludge and on the surface.

已经酸化的废水，乙酸转化为甲烷的场所主要在颗粒污泥的外表面；对于未酸化废水，这种转化发生在颗粒污泥的核心；难酸化的废水，污泥内部存在着底物酸化的过程。

Acetic acid, glucose and starch (ratio=3:1) as well as starch and peptone (ratio=3:1) were used as main sunbstrates for the calcium-containing wastewaters, which represented the wastewaters containing acidified, unacidified and unliquefied organic compounds, respectively.

本研究分别采用以乙酸、葡萄糖＋淀粉（质量比3∶1）、淀粉＋蛋白胨（质量比3∶1）为底物的含钙合成废水，分别代表已经酸化的有机废水、易酸化的有机废水和难酸化的有机废水，通过在UASB反应器中的运行，研究了厌氧生物过程对高钙废水去除作用、去除机理以及重要的影响因素。

The grids were then stained with 2% uranyl acetate solution for 10 min to enhance the contrast.

格栏然后用2%乙酸双氧铀溶液染色10min以强化对比度。

Macroporous tributyl amine aminating strongly basic anion exchange resin-a phase transfer catalyst with high catalytic activity for nucleophilic substitution,which was screened out via combinatorial chemistry method –was used to catalyze the nucleophilic substitution reactions for synthesis of benzyl acetate,benzyl propionate,benzyl butyrate and benzyl valerate.

用组合化学方法筛选出的对无外加碱条件下的亲核取代催化活性最高的聚合物季铵盐–三丁胺胺化强碱性阴离子交换树脂为相转移催化剂，催化合成了乙酸苄酯、丙酸苄酯、丁酸苄酯、戊酸苄酯等羧酸苄酯。

As for VFAs, acetic acid, butyric acid and valeric acid were totally metabolized, the residual VFAs were mainly propanoic acid.

其中，挥发酸中乙酸、丁酸和戊酸几乎100%被代谢掉，残余的挥发酸主要是丙酸。

The results showed that there were 8 kinds of aliphatic, 5 kinds of esters, 2 kinds of aldehydes, 2 kinds of nitrogen sulfur heterocyclic rings and one kind of hydrocarbon, alcoholics, ketone, lactones respectively in the analyzed 21 kinds of aroma components, and the content of furfural,β-methyl valeric acid, palmitic acid, nicotine, neohytadiene were higher, next were acetyl ethyl propionate, caleric acid, phenyl ethyl acetate, hydroxylic diethyl succinate.

结果表明，在分析出的21种香气成分中，分别有脂肪酸类8种，酯类5种，醛类2种，氮硫杂环类2种，烃类、醇类、酮类、内酯类各l种，其中相对含量较高的物质成分是糠醛、β-甲基戊酸、十六碳酸、烟碱、新植二烯，其次是乙酰丙酸乙酯、异戊酸、苯乙酸乙酯、羟基丁二酸二乙酯等。

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。