乙酸

And the optimum pH was 4-6 for the dechlorination reaction of 2,4-D, and pH between 2 and 8 were all suited for the reaction in Pd/Fe systems. Intermediate and final products of 2,4-D, HCH and chlordane with Pd/Fe were determined by GC/MS, and the possible dechlorination pathways were concluded: 2,4-D can be converted to phenoxyacetic acid through gradual hydrogenolysis, and HCH can be transformed to cyclohexatriene through dichloroelimination or dehydrochlorination.

通过GC/MS定性定量分析了三种目标污染物在Pd/Fe体系中发生还原脱氯反应过程中的反应物及最终产物，并根据反应产物推测分析了这三种有机污染物在催化还原反应体系中可能的反应途径：2，4-D主要通过逐级氢解最终生成彻底脱氯产物苯氧乙酸；而六六六则可能通过逐步双氯消除反应或脱氯化氢反应，最后生成环己三烯。

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。

METHODS:The serum was added with VC as antioxidant and treated with ethyl acetate to extract rifampiein. The method employed C18 column,and CH3OH-0.025mol/L NaA c(adjust to pH 7.0 with HAc)as mobile phase,chlordiazepoxide as intra-standard,a nd the UV detection wave length was at 334nm.

血清加抗氧剂维生素C后，用乙酸乙酯提取浓集进样，采用C18柱(150×3.9mm 4μ)，以甲醇-0.025mol/L NaAc(用HAc调到pH 7.0)(62∶40)为流动相，氯氮( HT6"，5"K〗艹)/为内标，紫外检测波长为334nm。

Selecting chlorination of hydroxyl group in sucrose 6-acetate is a key in the process of making sucralose.

蔗糖-6-乙酸酯的选择性氯化是合成三氯蔗糖的关键步骤。

Selecting chlorination of hydroxyl group in sucrose 6-acylates is a key in the process of making sucralose.

蔗糖-6-乙酸酯的选择性氯化是合成三氯蔗糖的关键步骤。

The company also production and operation of rubber, plastics and plasticizers series of sodium acetate and four chlorobenzene quinone, and other fine products.

公司还生产经营橡胶塑料增塑剂系列及乙酸钠以及四氯苯醌等精细化产品。

The optimum conditions are 0.2 mol chlorobenzene, and 0.7 g catalyst, and 0.07 mol glycine, and 0.08 mol nitric acid, and reaction time of 3 hours, and reaction temperature of 45℃.

最宜工艺条件：氯苯为0.2 mol，催化剂为0.7 g，氨基乙酸为0.07 mol，硝酸为0.08 mol，反应温度为45℃，反应时间为3 h。

This paper discussed antioxidation of chloroform extract and ethyl acetate extract of plum to lard and peanut oil.

研究了青梅氯仿提取物和乙酸乙酯提取物对猪油和花生油的抗氧化性能。

P chlorophenoxyacetic sodium was synthesized by p chlorophenol with 2 chloroacetic acid in the 20% hydroxide sodium aqueous solution.

采用一步法由氯乙酸与对氯苯酚在氢氧化钠质量分数为 0 2的水溶液中的反应制得。

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%。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。