查询词典 acetic acid

The yields of peracetic acid is studied from two different preparation methods using hydrogen peroxide and acetic acid or acetic anhydride .

比较了用乙酸和乙酸酐分别与过氧化氢反应制备所得的过氧乙酸的浓度。

In this study, the effects of adding chlorophenol, acetic acid and ozone were investigated separately in order to further study the mechanism of UV induced enhancement. The experimental results showed that adding acetic acid into the inlet gas decreased the chlorobenzene removal rate of the biofilter.

为了考察紫外预处理对生物过滤塔的影响机理，本研究分别考察了氯苯紫外光降解主要产物氯酚、乙酸以及副产物臭氧对生物过滤塔运行性能的影响。

ResultsXue Dan Wei Chang pill could reduce the areas of gastric ulcer caused by absolute alcohol in mice and acetic acid in rats,inhibit the auricle swelling caused by croton oil in mice and the number of stretching induced by acetic acid in mice.

结果雪胆胃肠丸均能使小鼠无水乙醇所致胃溃疡的溃疡面积明显减小，能降低大鼠溃疡指数，可降低醋酸致小鼠扭体反应的次数，抑制巴豆油致小鼠耳廓肿胀。

In order to reduce error of experimental data treatment, to strengthen accuracy of the result in conductivity determination of the dissociation constant of acetic acid, and also to further synthesis of experiment for training students' ability to treat data and to graph with computer, both Excel and calculator with statistical function have been utilized to perform a linear regression analysis of temperature-limiting molal conductivity of acetic acid solution.

为了减少实验数据处理的误差，提高结果的准确性；也为了进一步加强实验的综合性，培养和提高学生应用计算机处理实验数据和作图的能力，本文在电导法测定醋酸解离常数的实验中分别采用Excel电子表格和具有统计功能的计算器对醋酸溶液的温度和极限摩尔电导率数据进行线性回归分析，得到一元线性回归方程和相关系数，进而确定实验温度下醋酸溶液的极限摩尔电导率。

The molecular structural formula of the rhodamine 6G hydrazide salicylal azomethine is shown on the right, and the present invention discloses the synthesization method of the rhodamine 6G hydrazide salicylal azomethine and rhodamine 6G hydrazide salicylal azomethine solution used for the content determination of a small amount of cupric ions in water sample: 0 percent to 98.99 percent of ethanol, 99.99 percent to 1 percent of acetic acid / sodium acetate buffer solution with the pH value of 5 to 9, in which the total concentration of acetic acid is 1 to 100 millimoles per litre, 0.01 percent of N, N-dimethylformamide and 1ppm to 100ppm of rhodamine 6G hydrazide salicylal azomethine, all measured in mass percentage.

罗丹明6G酰肼水杨醛希弗碱，分子结构式如右，本发明公开了罗丹明6G酰肼水杨醛希弗碱的合成方法及其用于水样中微量铜离子含量测定的溶液：0～98.99％乙醇，99.99～1％pH值5～9的醋酸/醋酸钠缓冲溶液，该缓冲溶液中醋酸总浓度为每升1～100毫摩尔，0.01％N，N-二甲基甲酰胺和1～100ppm罗丹明6G酰肼水杨醛希弗碱，均为质量百分含量。

Hydroxy benzene acetic acid and acetic acid have biological activity, such as anti-bacterial and other aspects, a wide range of applications.

苯羟基乙酸和苯氧乙酸都具有生物活性，在诸如抗菌等方面具有广泛的应用。

Therefore, we started hydroxy benzene acetic acid and acetic acid coordination unit for the nodes of copper, cobalt, cadmium, manganese, zinc coordination polymers of structural chemistry studies.

因此，我们开展了苯羟基乙酸和苯氧乙酸配位单元为节点的铜、钴、镉、锰、锌配位聚合物的结构化学的研究。

objective:study female the yin false wet you of clinical pathology characteristics and discriminate judgment.method:rightness 69example sufferer of clinical and laboratory check the data carry on analysis.result:pcv and small labium seamy side the most familiar(91.3%) skin external appearance with floss form familiar(62.3%) be located on a roe of fish form a time it;(33.33%)organization pathology show the upper part in the ji layer to fill the air a sex net basket a form empty bubble cell kind change;the acetic acid experiment a rate;(97.17%)human milk head lump virus second type examination feminine gender.conclusion:pcvhave a clinical characteristics of show the zhao, acetic acid of experiment hpv examination have importance value towards discriminate analysis.

目的：探讨女阴假性湿疣的临床病理特点及鉴别判断。方法：对69例患者的临床及实验室检查资料进行分析。结果：女阴假性湿疣及小阴唇内侧最为常见(91.3％)皮肤外观以绒毛状常见(62.3％)位于鱼子状次之(33.33％)；组织病理示棘层中上部弥漫性网篮状空泡细胞样改变；醋酸的试验率(97.17％)；人乳头瘤病毒亚型检测阴性。结论：女阴假性湿疣具有显著的临床特点，醋酸的试验hpv检测对鉴别分析有重要价值。

During the reaction,the bromide component has been converted to catalytically inactive benzylic bromide.In pure acetic acid medium,the "catalyst failure" occurs owing to the formation of benzylic bromide while in acetic acid-water medium,the solvolysis of benzylic bromide by water maintains the catalytic activity to some extent.

反应过程中溴组分会转变为无活性的苄溴，在纯醋酸溶剂中，催化剂会因苄溴的形成而发生催化剂失活现象；在醋酸-水混合溶剂中，由于水对苄溴的溶剂化作用会使苄溴还原为溴离子，一定程度上保持了催化剂活性；并且在一定范围内，含水量的提高有益于生成醛选择性的提高，研究表明，将混合溶剂的初始含水量控制在5-10wt。

After the basis set superposition error correction and the zero point vibration energy correction, the interaction energies for three types of NMA-acetic acid complexes and one type of NMA-water complex were -44.3,-35.5,-32.4 and -16.0 kJ·mol-1 respectively, which showed that NMA had a great affinity for acetic acid than water.

NMA与水\醋酸之间都有氢键形成，经计算得到NMA-醋酸复合物的稳定化能在-32.4~-44.3kJ/mol之间，且平面构型的NMA-醋酸复合物稳定能较高，而NMA与单分子水的稳定化能仅为-16.0kJ/mol。

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。