二钠

The preparation method comprises monomer synthesis and polymer synthesis. The polymer synthesis is that cyclopentadienyl sodium monomer is added into metallic cobalt complex-triphenyl phosphorus cobalt chloride under strict oxygen-free and water-free conditions, and then double inner alkyne or outer alkyne conjugate monomer is added in, and after reaction, the precipitation, filtering, abstersion and vacuum-drying are carried out, the large molecules polymer containing cyclopentadienyl cobaltocenium organometallic cobalt is obtained.

制备方法，包括单体合成和聚合物的合成，聚合物的合成是在严格无氧无水条件下，在金属钴配合物三-三苯基磷氯化钴，加入环戊二烯钠单体，随后加入双内炔或双外炔共轭单体，反应后沉淀，过滤，洗涤，真空干燥，得到含环戊二烯茂钴有机金属钴的大分子聚合物。

Compared with the traditional surface activites of alky benzene sulfonate and alky sodium sulsate.

与十二烷基苯磺酸钠和十二烷基硫酸钠进行性能对比，表明SNSS表面张力、临界胶束浓度小，乳化力、钙皂分散力强，白度和松散度好。

In the present study, we have investigated the antidotal action of several sulphhydryl compounds against Sb-71 and their influence upon the inhibiting action of Sb-71 on Ehrlich ascites tumour in mice.

二巯基丁二酸钠1500毫克/公斤，BAL-glucoside 2000毫克/公斤，BAL 40毫克/公斤或半胱氨酸1000毫克/公斤可分别将Sb-71的急性LD_(50)剂量由40毫克/公斤提高至232，76，68和87毫克/公斤。

Sodium bisulfate is an excellent catalyst for synthesizing butanone 1,2-propan.

以一水合硫酸氢钠为多相催化剂，由丁酮和1，2-丙二醇反应合成了丁酮1，2-丙二醇缩酮。

Examples of humectants include lactic acid, urea (the urea found in creams is synthetically produced by combining one molecule of carbon dioxide with two molecules of ammonia and not obtained from urine), hyaluronic acid (able to retain 1000 times its weight of water), propylene glycol, glycerin, sorbitol, gelatin, lecithin, sodium pyrrolidone carboxylic acid, and butylene glycol.

常见的湿润剂有乳酸，尿素（面霜里的尿素来自于二氧化碳和氨分子的合成而不是从尿中提取的），透明质酸（能保持自身成分1000倍的水分），丙二醇，丙三醇，山梨糖醇，明胶，卵磷脂，吡咯钠，羧基酸和丁二醇。

Based on groups of single factor experiments, the yield could reached to 88.8% with the conditions: sodamide: cedrol :dimethyl sulfate = 1.6:1:0.9, refluxed 2h in first step reaction, and reacted at room temperature 1h after instillation of dimethyl sulfate, followed refluxed 1h in the second steps.

通过多组单因素实验发现氨基钠：柏木脑：硫酸二甲酯的摩尔比为1.6：1：0.9，第一步反应条件控制在回流2h，第二步反应先室温（25℃）滴加硫酸二甲酯后反应1h，再回流反应1h，得率可达88.8%。

In which 18.02 and 230.08 are the molecular weights of water and sodium tartrate dihydrate, respectively; W is the weight, in mg, of sodium tartrate dihydrate; and V is the volume, in mL, of the Reagent consumed in the second titration.

其中18.02和230.08是水和酒石酸钠的各自分子量，W是二水酒石酸钠的重量，以mg计，V是第二次滴定消耗的卡尔试剂的体积，以毫升计。不好意思，废话不多说，请大家多指教

ABSTRACT: In the presence of sodium t-butoxide and DMSO,ethyl 2-oxocyclopentanecarboxylate was subjected to C-alkylation with 2-(4-bromomethylphenyl)propanoic acid with high regioselectivity to give 2-［4-(1-ethoxycarbonyl-2-oxo-1-cyclopentanylmethyl)phenyl］propanoic acid (4) which was followed by hydrolysis,decarboxylation and salt formation to afford loxoprofen sodium in about 72% overall yield.

在叔丁醇钠和二甲基亚砜的存在下，2-丙酸对2-乙氧羰基环戊酮进行C-烷基化，再经水解脱羧，成盐即得洛索洛芬钠，以2-丙酸计算，总收率为72%。

A novel anionic gemini surfactant,didodecyl-ethoxylate bis-sodium sulfate was prepared in three steps using lauryl alcohol,glycol-epiglyceride and chlorosulfonic acid as raw materials and BF_3-ethyl ether as catalyst.The chemical structure of the product was confirmed by IR spectrum.

以十二醇、乙二醇二环氧甘油醚和氯磺酸为原料，以BF3-乙醚为催化剂，通过三步法制备阴离子型双子表面活性剂双十二烷基乙氧基二硫酸酯钠；红外光谱对其结构进行了表征，测定了其表面活性和发泡力等性能。

Sorbitol, Water, Hydrated Silica, PEG 32, Sodium Lauryl Sulfate, SD Alcohol 38B, Flavor, Cellulose Gum, Zinc Citrate Trihydrate, Sodium Saccharin, Titanium Dioxide.

山梨醇，水，硅酸，PEG 32，月桂基磺酸钠，SD Alcohol 38B，纤维素胶，柠檬酸锌三水化合物，糖精钠，二氧化钛

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。