查询词典 acetic acid

The quantity ratio of four main esters in Taishan Tequ is reasonable, the content of caproic acid and acetic acid is comparatively higher in Taishan Tequ, the content of n-propanol is also a bit high, and the content of aldehydes is suitable.

泰山特曲具有合理的四大酯量比，己酸、乙酸含量较高，正丙醇含量稍高，适量的醛类物质。

In acetic acid and using cobaltous acetate as catalyst m-chlorobenzoic acid was synthesized by the reaction of m-chlorotoluene with oxygen.

在醋酸溶液中，醋酸钴为催化剂，以间氯甲苯、氧气为原料合成间氯苯甲酸，分别研究了反应温度、反应时间、原料配比、催化剂的用量等条件对合成反应的影响，确定了最佳工艺条件。

DCA, or dichloroacetic acid, is an analogue of acetic acid in which chlorine atoms replace two of the three hydrogen atoms on the methyl group.

DCA也叫二氯乙酸或二氯醋酸，是一种类似乙酸的化合物，但乙基团上有两个氢原子被氯原子所取代。

A spectrophotometric simultaneous determination of glutaraldehyde and ethanal based on the reaction between gluaradehyde or ethanal and thiobarbituric acid in acetic acid solution is described.

在醋酸介质中，硫代巴比妥酸与戊二醛及乙醛分别可生成2∶1及1∶1的缩合产物，这两种缩合产物在可见光区具有不同波长的最大吸收，籍此可同时测定戊二醛及乙醛。

Under the optimum conditions, the extraction rates of the two most important inhibitors, namely formic acid and acetic acid, were up to 84% and 98%, respectively.

在最佳试验条件下，两种最重要的抑制物甲酸和乙酸的抽提率分别达到84%和98%。

Many say that glucuronic acid is the most important factor while others believe that acetic acid plays a role also.

好多人说葡萄糖醛酸是最重要的因子而其他人认为是醋酸也在起作用。

The results showed that noradrenaline, dopamine, homovanillic acid,5 hydroxytryptamine (5 HT) and 5 hydroxyindole 3 acetic acid (5 HIAA) in pallium, striatum, hypothalamus of stressed rats were decreased by piracetam ( 100 mg/kg ; 200 mg/kg )to different degrees and formed a certain relation of amount effect.

对于老年性痴呆、酒精中毒、电休克引起的记忆缺损，儿童智力低下以及脑外伤或手术后意识障碍等均有明显改善和恢复作用。关于吡拉西坦对脑内NE、DA、5 HT等水平的影响因不同剂量、用药时间、以及在给药后不同时间测定递质水平等都会取得不同结果[4～ 6] 。

The results indicated that the total quantity of volatile components in grape wine after MLF had increased and there were evident difference in the contents and proportion of isoamyl alcohol, 2-ethyl hydracrylic acid, ethyl succinate, and acetic acid in the two kinds of grape wine treated or not treated by MLF.

结果表明，MLF葡萄酒较未经MLF的葡萄酒中挥发性成分的总量有所提高；异戊醇、2-羟基丙酸乙酯、琥珀酸乙酯和醋酸在两工艺的葡萄酒中的含量和比例存在明显差异；乳酸、乳酸乙酯和两种未能准确鉴定的物质只在MLF葡萄酒中作为主要成分被分离检测到。

A method for the determination of Acetic acid and Hydrobromic acid in air and environmental sample by ion-chromatography is described.

用同一吸收液采集、离子色谱法测定空气中的乙酸和溴化氢，采样体积为60L时，乙酸和溴化氢的检出限分别为0.03mg/m3和0.11mg/m3，相对标准偏差分别为1.9%和1.7%，实际样品的加标回收率分别为90.1%~102%和

These conditions included original material source, reagent ratio, base solutions, power of the microwave, reaction time and so on.2, Chitosan obtained from above was modified by Schiff base type macrocycles, which was prepared by the reaction of the reagents of salicylaldehyde, glacial acetic acid, hydrobromic acid, chloroepoxy propane and the others.

反应的最优化条件为：物料比1：25；反应时间20min；NaOH溶液浓度为50%；微波功率为450w。 2、利用原料水杨醛、氢溴酸、冰醋酸等采用四步法合成了含羟基的Schiff碱型大环化合物，然后以取代方法将此Schiff碱型大环化合物负载到壳聚糖上，得到具有特殊结构与性能的壳聚糖衍生物，并得到各中间产物的红外光谱图。

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。