查询词典 acid reaction

Polyglutamic acid ; complexation reaction ; ultraviolet spectrophotometry ; chloranil

γ-聚谷氨酸；络合反应；紫外分光光度法；四氯对苯醌

Reductive dechlorination of chlorinated Endocrine Disrupting Chemicals in Water by metallic catalytic reduction was studied for further understanding the application of palladiumized iron-scrap bimetallic catalytic reduction technology in treating high molecular weight and structure complicated refractory chlorinated organic pollutans, especially, the reductive dechlorination reaction of the three chlorinated EDCs: 2,4-dichlorophenoxyacetic acid(2,4-D), Hexachlorocyclohexane, and chlordane.

通过研究水体中有机氯类环境内分泌干扰物在金属催化还原体系中的还原脱氯反应，考察了铁屑镀钯双金属催化还原技术在处理水体中大分子量复杂结构的难降解氯代有机污染物的应用，着重研究了水体中2，4-二氯苯氧乙酸(2，4-D)、六六六和氯丹三种有机氯类环境内分泌干扰物在Pd/Fe催化还原体系中的还原脱氯行为。

When the molar ratio of 2 chloroacetic acid∶ p chlorophenol is 1.25 and pH=5～7 at 104 ℃ reaction for 20 min in the 20% NaOH solation,the yield of PCPA can be reached 90%.

氯乙酸∶对氯苯酚为 1 2 5 ，质量分数为 0 2的氢氧化钠溶液中，pH值在 5～ 7之间，温度在 10 4℃左右为宜，反应时间为 2 0min ，PCPA收率为 90 3%。

The kinetics of chrysotile in hydrochloric acid is studied by building the overall kinetic model for the fibrous particle in liquid-solid reaction.

进而通过建立液－固相反应纤维状颗粒的宏观动力学模型，研究了纤蛇纹石盐酸浸出的动力学过程。

More levels of nano-SiO〓 lead to larger particle size. An increase in polymerization reaction temperature causes the decrease in coagulum and increase in viscosity and particle size, and the nano-SiO〓 has same effects at certain temperature. When the levels of hydrophilic monomer acrylic acid and hydroxylethyl methacrylate in core composite are increased, the particle size of emulsifier-free emulsion decreases, in spite of the presence of nano-SiO〓.

无皂乳液具有单分散性好、表面洁净、成本低廉、不影响产品性能的特点，首次研究了含或不含纳米粒子的含羟基和羧基的丙烯酸无皂乳液聚合，发现含或不含纳米粒子的无皂乳液聚合后的粒子粒径较大，具有单分散性；较多的纳米粒子导致较大的乳液粒径；反应温度升高，凝聚物含量下降，而乳液粘度和乳胶粒粒径增加，在相同的反应温度下，纳米粒子降低了聚合过程中的凝聚物含量，增加了乳液聚合物的粘度和粒径；不论纳米粒子是否存在，当无皂乳液核组成中亲水单体AA和HEMA用量增加时，乳胶粒粒径均减少。

When the sodium lauryl sulfate and p-octyl polyethylene glycol phenyl ether is used and its level in 3% and 6: 4 ratio, the polymerization process has the lowest coagulum and the highest monomer conversion. Higher reaction temperature and more level hydroxyl value lead to more coagulum, the latter also lead to larger particle size. The acid value has larger influence on viscosity and coagulum, there exist a best range. The emulsion particle size is larger for its hydrophilicity, most of its particles are connected together.

在含较高亲水单体的乳液聚合体系中，难以制得稳定的预乳化液，不能采用工业生产中常用的预乳化工艺，而只能采用混合单体直接滴加的方法；由于单体混合物的亲水亲油值较高，用阴离子型乳化剂十二烷基硫酸钠和非离子型乳化剂聚乙二醇辛基苯基醚混合，用量为单体总量的3％，且比例在6：4时，乳液聚合时具有最低的凝聚物含量和最高的单体转化率；乳液聚合反应温度升高，可以提高单体转化率，增加反应速度，但凝聚率相应提高；随着羟基单体含量的增加，聚合过程中凝聚率增加，聚合物乳胶粒平均直径增加；羧基单体有一个最佳的用量（2.6％），过高或过低凝聚率均提高；羧基含量对乳液的粘度有较大的影响，当羧基含量较低时，羧基含量增加，乳液粘度增加明显；含羟基乳液粒子由于含亲水基团较多，使得乳胶粒径增大，乳胶粒子大多数互相凝聚在一起，处于凝聚态。

Based on corn cobs , a pretreatment process in modest conditions atmospheric pressure and moderate reaction temperature was designed to fractionate lignocellulose by using formic acid .

以玉米芯为研究对象，提出了常压中温条件下甲酸预处理木质纤维素组分分离的工艺。

Because of specificity and high efficiency, the catalytic efficiency of cellulase is high(more 103~1013 times than general catalysts), the condition of catalytic reaction is mild and the catalytic activation can be adjusted and controlled, which can improve remarkably semblance and handle of fabrics during finishing fabrics by biological catalyzing, moreover cellulase can replace some chemical materials such as acid, cocain, chlorine and phosphorus etc, so as to decrease pollution, make no waste-water and protect environment.

由于酶具有专一性和高效性，采用生物催化，其催化效率高比一般催化剂高10~3～10~(13倍，催化反应条件温和，催化活性可调节控制，应用在纺织品处理上，能显著改善织物的外观和手感，并能取代一部分酸、碱、氯、磷化合物等化工原料，从而减少污染，不产生污水，有利于环保和生态。而且酶本身又无毒，容易生物降解，不会引起环境污染，所以酶处理已被公认为是一种符合环保要求的绿色印染加工方法。本文选用了市场上常用的纤维素酶R-10和纤维素酶ECS2610两种生物酶。

A method for determinating the activities of pectinase was proposed in this paper. It can produce the red-brown amino compounds when 3,5-dinitrosalicylic acid and aldehyde were heated together. The amino compounds had maximum absorbency at 540nm. In certain range, there was a good linear relationship between the amount of reducing sugar and the color of the reaction mixture.

针对QB1502-92标准测定方法测定高活力果胶酶、固定化果胶酶活力存在的实验误差大，重现性及灵敏度差的缺陷，提出了利用3，5-二硝基水杨酸与醛糖共热产生棕红色的氨基化合物，在一定范围内还原糖的量和含有呈色氨基化合物的反应液颜色深浅成正比的原理，在540nm下测其吸光度，从而计算出果胶酶活力的测定方法，并对测定步骤、影响因素及测定中可能出现的问题进行了试验研究。

By the research of tapioca starch and acrylic acid graft copolymerization, influencing rules of reaction conditions were discussed.

通过对丙烯酸与木薯淀粉接枝反应的研究，得出不同反应条件对接枝反应的影响规律。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。