查询词典 chloroacetic acid

The result indicated that MgO and α- methacrylic acid can together thicken epoxy, and the speed of thickening epoxy become quickly with the increasing content of MgO; when the ratio of MgO and α- methacrylic acid is 3:1, thickening epoxy have a better effect; the thickening mechanism: the terminal corboxyl group of α- methacrylic acid react with MgO, and it accompany with large numbers of heat, the heat can accelerate the reaction between the terminal corboxyl group with the secondary hydroxyl groups of epoxy, intermolecular hydrogen bonding which the water of above-mentioned formation result in and complex compound which format the metal atoms and carbonyl group complexing collective increase the viscosity of epoxy resin.

结果表明：MgO和α－甲基丙烯酸配合可增稠环氧树脂，随着MgO加入量的增加，环氧树脂增稠的速度加快；MgO与α－甲基丙烯酸为3：1时，增稠环氧树脂的效果较好；推测环氧树脂的增稠机理是α－甲基丙烯酸中的端羧基与氧化镁反应，放出热量促使其端羧基与环氧树脂中的仲羟基反应，上述反应生成水产生的氢键和羰基与氧化镁中的金属原子形成络合物共同导致环氧树脂的粘度增加。

Sibiricum samples. Conclusion: 5-O-caffeoylquinic acid, 1,4-di-O-caffeoylquinic acid and 4,5-di-O-caffeoylquinic acid were isolated from Xanthium plant for the first time.

5-O-咖啡酰奎宁酸，1，4-二-O-咖啡酰奎宁酸和4，5-二-O-咖啡酰奎宁酸是从苍耳属植物中首次分离获得。

A safe method for p reparing nitro form isp resented which consists of nitrating a startingma2terialwhich the starting material dissolved or sus2pended in sulfuric acid, and a nitrating agent con2sisting of nitric acid, nitrate salts or nitrogen pentoxide is added to the sulfuric acid solution / sus2pension at 210℃ to + 80℃.

当汉语长难句内容的叙述层次与英文基本一致时，可以按照顺序翻译。例10 介绍了一种制备硝仿的安全方法，该方法首先硝化起始原料，起始原料溶解或悬浮于硫酸中，然后在- 10℃～+ 80℃，将硝化剂(由硝酸、硝酸盐或N2O5 组成)加入硫酸溶液或悬浮液中。

The quality change was evaluated over a course of 4 weeks for pH, volatile basis nitrogen, peroxide value, thiobarbituric acid reactive substances, free fatty acid, fatty acid and sensory change.

在4周期间内评价鱼干的品质变化，评价指标包括pH值、挥发性盐基氮、过氧化值、硫代巴比妥酸反应物、游离脂肪酸、脂肪酸和感官变化等。

Piperidinecarboxylic acid is used as the raw material and acetic acid as the acylating agent, followed by the addition of some acetic anhydride in the later stage to get an important organic intermediate n-acetylpiperidine-4 carboxylic acid in the yield of 92%. Toluene is used as the solvent instead of sulfinyl chloride in the acyl chlorination to produce n-acetylpiperidine-4-carbonyl chloride with the yield of 97%.

以4-哌啶甲酸为原料、醋酸为酰化剂，后期加入少量醋酸酐反应得到中间体N-乙酰基哌啶－4-甲酸，收率92%；在甲苯溶剂中进行酰氯化得目标产物N-乙酰基哌啶－4-甲酰氯，收率97%。

Objective To establish HPLC-UV method for determination of glycyrrhizin acid in compound nasal spray of glycyrrhizin and flower flos magnoliae,the chief active ingredient of formulation,glycyrrhizin acid,and to observethe therapeutic effect of this formulation on guinea pig's hypersensitive rhinitis.Methods A compound nasal spray formulation was prepared using extracts of glycyrrhizin and measured by HPLC-UV method.Mobile phase conˉsisted of methanol,0.2mol/L ammonium acetate and glacial acetic acid（67:33:1,v/v）,analytical column was Zorbax ODS C 18 and wavelength250nm.

目的 建立测定复方甘草和辛夷喷雾剂含量的方法并观察该制剂对豚鼠超敏性鼻炎的疗效方法以甘草提取的甘草甜素和辛夷花蒸馏提取液主药制备成鼻用喷雾剂，用反相高效液相色谱法测定制剂中甘草酸含量，检测波长为250nm，Zorbax ODS C 18 分析柱，流动相为甲醇：0.2mol/L醋酸铵：冰醋酸（67：33：1）。

Although having minimal effects on DM digestibility, NDF digestibility, DM Recovery and concentrations of lactic acid, NDF, and crude protein, treatment of corn stover silages with cellulase had reduced VBN/TN 28%, ADF20% and butyric acid-to-total acid 100% as compared with control silage.

添加纤维素酶可以使玉米秸秆青贮饲料中的氨态氮与总氮比值降低28％，丁酸占总酸的比例降低100％，ADF含量下降20％，显著提高了玉米秸青贮饲料的营养价值。

The degradation of 2, 4-dichiorophoxyacetic acid (2, 4-D) by ozonation combined with sonication (03/US) was investigated. Based on the authors' first paper about the synergistic effect of ozone and US, this paper presents intermediate products of 2, 4-D degradation. The main intermediates were 2, 4-dichiorophenol, benzopuinone, hydroquinone and organic acids, such as maleic acid and oxalic acid and soon.

利用臭氧超声波联合工艺对苯氧羧酸类除草剂2，4-D进行降解研究，在前文探讨臭氧超声波之间协同效应的基础上，确定其中间产物种类主要有2，4-二氯苯酚、苯醌、氢醌以及小分子酸如顺丁烯二酸、草酸、甲酸、乙酸等。

Disclosed is a method to prepare 3, 3-dimethyl butyric acid chloride, relating to an organically synthesized intermediated compound and particularly relating to a method to prepare 3, 3-dimethyl butyric acid chloride from 3,3-dimethyl butyric acid and phosphorus trichloride.

3，3-二甲基丁酰氯的制备方法，涉及一种有机合成中间体，尤其是涉及一种由3，3-二甲基丁酸与三氯化磷反应制备3，3-二甲基丁酰氯的方法。

Company covers an area of 6000m2, equipped with casting, steel casting, machining, finishing, such as workshops, the chemical industry are the production of sulfuric acid equipment sentinel professional enterprises, can provide users with 10-400Kt / a sulfuric acid plant voltage cast iron pipe into tower oliveri heat plate, with three towers acid, boiling furnace hood, K alloy casing, valves, etc..

公司占地面积6000m2，设有铸造、铸钢、机加工、精加工等车间，是化工行业定点生产硫酸设备专业企业，能为用户提供10-400Kt/a硫酸装置耐酸耐压铸铁管、转化塔耐热篦子板、三塔分酸器、沸腾炉风帽、K合金套管、阀门等。

You have to walk your own alk in this life.

次生中你必须走自己的路。

To start with, the thesis analyses ***ism in terms of the generic masculine words, word order and semantic derogation of women in greater detail.

论文首先从阳性词泛指，词序，词义的贬降等方面对英语中的性别歧视现象进行了详细的分析。