乙酸

Application of microwaves for destabilization of patulin in acetic acid buffer solution (pH 4.0) was studied.

对乙酸缓冲液中的棒曲霉素进行微波处理，以研究微波处理对苹果汁中棒曲霉素的破坏作用。

A new type of difunctional initiator (benzyl dibromide, ethyl dibromoacetate) was proposed in this paper and used to synthesize poly based triblock copolymers such as PSt-PBA-PSt, PMMA-PBA-PMMA.

本论文提出一种新型ATRP双官能团引发剂(如α，α-二溴化苄、α，α-二溴乙酸乙酯)，并用聚合反应速度法、GPC法、核磁分析法进行双官能度的验证，并通过两步聚合合成以聚丙烯酸酯为中间嵌段、苯乙烯或甲基丙烯酸甲酯为两端嵌段的ABA型三嵌段共聚物。

The effect of the addition of trisaminomethane on the separation of diethylstilbestrol and its cleavage product wasstudied.

该方法中以甲醇作为溶剂，以乙酸钠作为电解质，研究了三羟甲基氨基甲烷的加入对分离己烯雌酚及其分解产物的影响。

High purity of methane in acetate-fed digester was due to dissolution of carbon dioxide in high pH effluent.

而乙酸进料的反应器所产生的高纯度甲烷源於高pH值的出水对沼气中二氧化碳的吸收。

In this paper, Claisen condensation of isochroman ?4?one as starting material with diethyl oxalate is carried out to form β?diketone compound of isochroman ?4?one.

以异色满酮 4为起始原料，经Claisen缩合得其β二酮衍生物，再与水合肼进行Knorr反应环合成 3 乙氧甲酰基和 3 肼甲酰基异色满并吡唑衍生物，通过酰肼与糠醛反应成腙后，分别与巯基乙酸和氯乙酰氯反应合成了标题化合物

In our research on study chemical reaction of active methylene compounds and brom-acetophenone. Because of brom-acetophenone is compound that contain carbonyl and halogen ,which will take place electrophilic substitution and nucleophilic addition. When active methylene compounds are ethyl acetoacetate and β-diketone, controlling reaction condition, we have found that mono-substitution's production and di-substitution's. production is isolated; active methylene compounds are acetoacetanilide and acetoacetanilide derivate, pyrrolidin-2-one derivants were obtained by substitution and close-ring reaction .but there is no report about it.

本文是让活泼亚甲基类化合物与溴代苯乙酮发生化学反应，由于溴代苯乙酮是含有羰基的卤代烃结构，它可以发生亲电取代和亲核加成反应，当活泼亚甲基类化合物为乙酰乙酸乙酯和β-二酮时，控制反应条件可以发生单取代和双取代两种产物；当活泼亚甲基类化合物为乙酰乙酰芳胺类化合物来反应时，溴代苯乙酮中的羰基与氨基会发生分子内的关环反应生成吡咯烷-2-酮衍生物，这在以前的研究中是没有发现的。

Dimethylamine will enhance aggregation of a dye on TiO_2 surface.Density functional theorycalculations are performed for geometry optimization.

对染料结构的密度泛函理论计算证明了N-TPA1的LUMO电子集中在氰基乙酸基团上，N-TPA2的LUMO电子集中在罗丹宁构架内。

Results: When the quantity of monochloroacetic acid was 0.3 mol, The preferable conditions were 0.42 mol dimethylamine, reaction temperature about 40℃, 2-hour reacton time and 50 ml dilute water.

结果 当氯乙酸投料量为0.3mol时的最佳反应条件为二甲胺0.42 mol，缩合温度40℃左右，缩合时间2h，稀释水量50ml。

The velocities of reaction of ethyl acetate with sodium hydroxide in dioxane- water mixture have been determined in seven different temperatures(5°,10°, 15°,20°,25°,30°and 35°).

作者在7具不同温度(5°，10°，15°，20°，25°，30°，35°)下，研究了乙酸乙酯和氢氧化钠在二氧六圜和水的混合溶剂中的反应速度。

Dioxane was selected as solvent. The linear range for methanol was 6-54mg/L for ethanol and ethyl acetate both were 10-90mg/L. The average recovery of them was 99, 36, 101.26% and 101.57% respectively.

在上述色谱条件下，甲醇的线性范围为6-54mg/L，乙醇和乙酸乙酯的线性范围为10-90mg/L；平均加样回收率分别为99.36、10l.26%和101.57%。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新