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The experiment indicates: on condition that the mole ratio is 1.1:1, temperature is 90~98℃, pH is 1~2, acid adding speed is 1 drop/(2~3) second, the yield and quality of the products can get increased when reaction liquid disposed with ultrasound wave.

实验表明:在硅酸钠与钨酸钠的物质的量比为1.1:1,控温90~98℃,pH值1~2,加酸速率1滴/(2~3)s的优化条件下,用超声波处理反应液可以增加产品的产量和质量。

The main chain and side chain have different effects on the surface properties.

研究了多烷基苯磺酸钠的结构,特别是侧链碳原子数的增加,对其表面活性的影响,并与其它烷基苯磺酸钠进行了比较。

Ache with tristearin, sodium or nitrify cotton is coagulating agent, adopt the legal system of two steps Bei technology, in 65 ℃ respond , shell mellow wine: tristearin acid: the best proportion of the sodium of sodium hydroxide is 91: 6.5: 1, compound with two methods solid shell mellow wine, at the same time join stabilizing agent , eliminate smoke dose , restrain volatilizer and fireworks modifier etc., is as hydration alumina eliminate smoke dose, raise the integral performance of solid shell pure fuel.

以硬脂酸钠或硝化棉为凝固剂,采用两步法制备工艺,在65℃时进行反应,甲醇:硬脂酸:氢氧化钠钠的最佳比例为91:6.5:1,用两种方法配制出的固体甲醇,同时加入稳定剂、消烟剂、抑制挥发剂、焰火改性剂等,如水合氧化铝作为消烟剂,来提高固体甲醇燃料的综合性能。

sodium vanadate significantly inhibits the proliferation of human esophageal cell line ec109. the antitumor mechanism of sodium vanadate may be related to down-regulation of erk1/2 expression.

一定浓度的钒化钠能明显抑制食管癌细胞系ec109细胞株的生长,钒化钠的抗肿瘤机制可能与 erk1/2蛋白表达水平降低有关。

The surface action mechanism of sodium polydithio dipropyl sulfonate in acidic Cu plating bath indicates that the surface complex produced by adsorbed sodium polydithio dipropyl sulfonate and Cu + resists copper ions' electrodeposition.

酸性镀铜溶液中表面活性剂聚二硫二丙烷磺酸钠的表面作用机理表现为:吸附态的聚二硫二丙烷磺酸钠与Cu+形成表面络合物阻化铜离子的电沉积。

The fast gelable CS/GPS solutions at 37℃can be obtained by increasing the concentration of GPS and pH of solutions through dissolved GPS into dilute NaOH solution.

增大甘油磷酸钠的浓度,并将甘油磷酸钠溶于氢氧化钠稀溶液中来提高混合溶液的pH值,可得到在37℃下快速凝胶化的CS/GPS体系。

The hydrogen precipitation of different metals, platinum, lead, nickel, iron and titanium, were discussed in different pH value and current density. By using Cyclic Voltammetry to study the reduction reaction, copper, titanium, lead, Ti/PbO2 and Ti/MnO2 as cathode respectively, it is proved that sodium metaborate can be electrochemically reduced to sodium borohydride. The kinetic parameters and fractal dimension of these electrode, graphite, lead iron Ti/PbO2 and Ti/MnOa etc, will be researched.

采用循环伏安法,分别以铜、钛、铅、钛、Ti/PbO_2和Ti/MnO_2作为阴极,对该反应进行实验研究,证实了偏硼酸钠电化学还原制各硼氢化钠的可能性;分别对石墨、铅、铁、Ti/PbO_2和Ti/MnO_2等电极在本实验体系中的电极动力学参数(a,b,i_0)及分形维数进行了讨论,认为Ti/PbO_2为该体系中的最佳电极材太原理工大学硕士研究生学位论文料。

Therefore, pretreatment of raw flax was performed with selected chelating agents such as ethylene diamine tetraacetic acid, sodium tripolyphosphate, oxalic acid and ammonium oxalate.

选用EDTA、多聚磷酸钠、草酸和草酸铵等螯合剂对亚麻原麻进行了预处理,结果表明:EDTA、草酸、多聚磷酸钠的处理效果均不理想,改变浓度、温度等条件,韧皮与麻秆并没有分离;而草酸铵是比较有效的螯合剂,用5 g/L的草酸铵在62℃处理亚麻原麻5 h后,韧皮与麻秆能够完全分离。

It was shown that these two strains both can utilize benzoate as sole carbon source and the maximum tolerance of benzoate are 1.7% and 1.600, respectively; These two strains both can grow on benzene, toluene, xylene, phenol, benzyl alcohol of as sole carbon source. Pfluorescens PFO1 can degrade dianiline, 3,5-dinitrosalicylic acid, p- dimethylaminobenzaldehyde while P. aeruginosa ATCC27853 can utilize 3,5-dinitrosalicylic acid, p- dimethylarninobenzaldehyde.

结果表明,两种菌都能在以苯甲酸钠为唯一碳源的基础培养基上生长,并且,对苯甲酸钠的耐受性分别达到1.7%和1.6%;两种菌都能以适当浓度的苯,甲苯,二甲苯,苯酚,苯甲醇为唯一碳源生长;荧光假单胞菌能以二苯胺,对二甲氨基苯甲醛,3,5-二硝基水扬酸为唯一氮源生长;铜绿假单胞菌能以3,5-二硝基水扬酸,对二甲氨基苯甲醛为唯一氮源生长。

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

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I this is at that time, the opinion with peacockish true girl is full of in a heart.

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