氯酸

Abstract］ Objective:To study the feasibility of selfmade microtitration in determining the contents of chlorphenamine maleate.

马来酸氯苯那敏；非水滴定；微型滴定［摘要］目的：研究利用自制微型滴定装置测定马来酸氯苯那敏含量

A method for synthesizing sodium sulfoacetic is discussed,which sodium sulfoacetic is synthesized with sodium sulfite and ethyl monochloro acetate,with sodium sulfite and chloroacetic acid.

主要分别介绍用亚硫酸钠与氯乙酸乙酯合成磺酸乙酸钠和亚硫酸钠与氯乙酸合成磺酸乙酸钠。

In the process of the sulphonate reaction, we use 1,2-dichloroethane as solvent and chlorosulfonic acid as the agent of sulfonation.

环化反应采用1，2-二氯乙烷作溶剂，用氯磺酸作磺化剂，在回流温度下进行磺化反应，3-十二烷基蒽醌磺酸的收率为85.75%。

Results The concentration of Chlorogenic acid was 0.05mg/ml, 0.1 mg/ml,0.4mg/ml,0.8mg/ml respectively,it can respectively inhibit respiratory syncytia virus,Coxsackie B 3 virus,adeno associated 7 virus,adeno associated 3 virus and Coxsackie B 5 vi...

结果 氯原酸浓度分别为 0 。0 5mg/ml、0 。1mg/ml、0 。4mg/ml、0 。8mg/ml时，可分别体外抑制合胞病毒、柯萨奇B3、腺病毒 7型、腺病毒 3型和柯萨奇B5型。结论氯原酸对常见呼吸道病毒有较强的抑制作用

In this study, new benzo[l,2,3]thiadiazole derivatives were designed according to relationship of structure and efficacy. The 9 novel compounds were synsthesized with following reactions. The chlorine atom in 2-chloro-3,5-dinitro-benzoic acid as beginning raw material was substituted by 2-methylpropane-2-thiol, esterified then with bromoethane, reduced by iron powder and cyclized to obtain ethyl benzo[l,2,3]thiadiazole-7 after diazonation reation.

本论文根据苯并噻二唑诱导剂的构效关系设计了新的苯并噻二唑的结构，并合成了9个未见文献报道的化合物，合成步骤如下：采用2-氯-3，5-二硝基苯甲酸为起始原料，苯环上的氯原子被叔丁基硫醇置换，羧酸由溴乙烷酯化，硝基由铁粉还原，随后经重氮化关环生成苯并[1，2，3]噻二唑-7-羧酸乙酯。

In order to improve the catalytic performances of the chloroaluminate, some organic chemicals with strong electron-donating capacity,such as benzene,alkylbenzene,thioalcohol and thiophene,were introduced into the ionic liquids to modify the ionic liquids.

为改善氯铝酸离子液体的催化性能，向氯铝酸离子液体中引入微量具有供电子能力的苯，烷基苯，硫醇，噻吩等助剂，对离子液体进行改性。

The invention uses the fermentation liquor of one Escherichia coli generating polysialic acid as material, filters and removes thallus, adds some solvents as sodium chloride and alcohol into supernatant to deposit polysialic acid, dissolves the polysialic acid deposits via deionized water, filters to remove modified protein, uses alkali prolease to treat filtrate, complexes deposits via cetyl pyridinium chloride or cetyltrimethylammonium bromide, and dissociates, uses over alcohol to deposit polysialic acid, dissolves the deposits via ultra-pure water, grades and purifies via chromatography column, collects and dialyzes eluent, cools and dries to obtain polysialic acid.

本发明以一株产聚唾液酸大肠杆菌的发酵液为原料，经过过滤去除菌体，上清液加入适量氯化钠和乙醇等溶剂沉淀出聚唾液酸，聚唾液酸沉淀用去离子水溶解，再用过滤去除变性蛋白质，滤液经过碱性蛋白酶处理、氯代十六烷基吡啶或十六烷基三甲基溴化铵络合沉淀并解离后，再用过量乙醇沉淀出聚唾液酸，聚唾液酸沉淀用超纯水溶解，用层析柱进行分级纯化，收集洗脱液经过透析，冷冻干燥得聚唾液酸产品。

Part I, the Friedel-Crafts acylation on DAA and methyl dehydroabietic acid was carried out with acetyl chloride, benzoyl chloride or phthalic anhydride as acylating regents, anh- ydrous aluminum chloride as catalyst and with different solvents to compare with, we have got t- hree new compounds.

第一部分，分别以脱氢松香酸和脱氢松香酸甲酯为底物，乙酰氯、苯甲酰氯、邻苯二甲酸酐为酰化试剂，无水三氯化铝作催化剂，采用不同的溶剂及反应条件进行傅克酰基化反应，得到3个新化合物。

The two enantiomers are obtained by recrystallisation from solvent C.

值可达99%以上，拆分后的--邻氯扁桃酸对于消旋邻氯扁桃酸的一半的收率为36.7%。

First, there are not an accurate density and specific rotation and relative e.e. value of 2-chloropropionic acid. No one has proved that 2-chloropropionic acid can be directly separated by using chiral stationary phase.

首先，由于现有文献和试剂手册中对2-氯丙酸的旋光和光学纯度的对映关系没有一个明确的标准，而且也未有任何研究证明2-氯丙酸可以在现有的一些常用手性固定相上进行直接拆分。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。