乙酸

A salt or ester of arsenic acid.

乙酸盐，乙酸酯

Three new fluo-rine-containing nitro benzimidazole derivatives were synthesized in the presence of 4-dimethylaminepyridine andtheir structure and configuration were confirmed by elemental analysis, IR, and 1HNMR.

在碱性条件下由2-(4′-羟苯基)-5-取代苯并咪唑与氯乙酸作用得到5个新化合物取代苯并咪唑基苯氧乙酸。

It is also shown that the solubility of solids of benzoic acid and 1-naphthalene-acetic acid increases with increase in pressure.

在相同的温度、压力下，苯甲酸的溶解度比苯乙酸大很多，理论分析认为，这是由于苯甲酸的极性较萘乙酸的强所致。

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用"一勺烩"方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

The relationship between glycosidic precursors and its aroma components was studied. The results showed: The dominant aroma constituents in aroma oil of jasmine tea include benzyl acetate, linalool, methyl antyranilate, cis-3-hexenyl benzoate, benzyl alcohol, indole, farnisene, methyl benzoate, methyl salicylate, geraniol, cis-3-hexenyl-acetate etc.; and the higher the concentration of these components is, the higher the quality of jasmine tea is.

结果表明：茉莉花茶香精油中，含量较高的有乙酸苄酯、芳樟醇、邻氨基苯甲酸甲酯、苯甲酸顺-3-己烯酯、苯甲醇、吲哚、法尼烯、苯甲酸甲酯、顺-3-己烯酯、水杨酸甲酯、橙花叔醇、乙酸顺-3-己烯酯、香叶醇；这些成分的含量随花茶品质的提高而增多；研究表明，花茶的高含量香气成分也是茉莉花中的主要赋香成分。

For the general two-step bleaching technique, peracetic acid are used as the initial bleacher, peracetic acid and hydrogen peroxide used as the further bleacher, to investigate the bleaching effect of flax textile, and are compared with the technique that sodium hypochlorite is used as initial bleacher and hydrogen peroxide as further bleacher through industrial tests.

对于两步漂白工艺的总体研究，分别研究了以过氧乙酸为初漂剂，过氧乙酸、双氧水为复漂剂，进行了亚麻织物漂白效果的研究；并通过工业化放大实验在漂白效果与经济成本上与现行的次氯酸钠初漂、双氧水复漂工艺进行了对比。

Further refining of acetic acid at a low concentration range wouled bring a bout a great increase in theoretical stages for distillation.

在较低乙酸浓度范围内，进一步精制乙酸，采用精馏方法所需理论级数大大增加。

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IAA was proved to be advantageous to producing more bulblets. The bulb scales treated by NAA could produce bigger bulblets. The propagation quotiety was inversely proportional with the bulblet volume.

吲哚乙酸有利于百合鳞片生成更多籽球，萘乙酸处理有利鳞片产生较大籽球，繁殖系数与繁殖的籽球体积成反比。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。