查询词典 surfactant

The method comprises:(1) weighing lead acetate hexahydrate and thioacetamide, and preparing aqueous solutions respectively, so that the concentration ratio of Pd2+ to S is 1:(1-4);(2) adding acetic acid into thioacetamide solution to adjust the pH value to 2-4;(3) adding poly surfactant into lead acetate solution, ultrasonicating to mix uniformly and obtain a colorless and transparent sol;(4) mixing the sol and thioacetamide solution;(5) placing the mixed solution in a sealed container, irradiating by 2.5 MeV and 40 mA electron accelerator with irradiation dose of 25-40 Mrad;(6) washing the product, centrifuging for separation, and drying to obtain black PdS nanoparticles.

本发明方法的工艺过程如下：首先称取一定量的六水合醋酸铅和硫代乙酰胺，各自配制成水溶液，其浓度比为使其中的铅离子浓度与硫原子浓度的比例为1∶1～1∶4；在硫代乙酰胺溶液中加入适量醋酸调节其pH值至2～4；醋酸铅溶液中加入少量表面活性剂聚乙烯醇，然后超声振荡，混合均匀，制成无色透明溶胶；随后将溶胶与上述的硫代乙酰胺溶液混合；将该混合液置于密闭容器中，并将其放置于2.5MeV、40mA的电子加速器产生的电子束辐照下进行辐照处理，其辐照剂量为25～40Mrad；然后将反应生成物清洗，并用高速离心机离心分离，然后干燥，最终得到黑色纳米硫化铅颗粒。

ZnO nanorings were prepared on a large scale by a facile solution-based method at 70 ℃ for 5 h via hexamethylenetetramine(C6H12N4) and Zn(NO3)2·2H2O as the raw materials in the presence of surfactant PAM-CTAC.

以六次甲基四胺(Hexamethylenetetramine， C6H12N4)和水合硝酸锌[Zn(NO3)2·2H2O]为原料，表面活性剂聚丙烯酰胺-氯化二烯丙基二甲基铵为形貌控制剂，采用液相沉淀法合成了ZnO纳米环。

Aimed at the difficulty of heavy oil development and the high price of general surfactant as emulsifying agent,the probability of sodium humate as emulsifying agent was discussed.

针对稠油油藏开采难度大，采用常规乳化用表面活性剂费用高的现状，研究廉价的褐煤腐植酸钠作为稠油乳化剂的可能性。

Abstract］ Objective To explore the curative effects of pulmonary surfactant on hyaline membrane disease of newborn.

摘要］ 目的探讨肺表面活性物质治疗早产儿肺透明膜病的临床疗效。

Objective To explore the therapeutic effect and complications of pulmonary surfactant in the treatment of hyaline membrane disease of newborn.

目的 探讨肺表面活性物质治疗新生儿肺透明膜病的疗效及其并发症。

ObjectiveTo investigate the effect of large first dose of pulmonary surfactant on treatment of severe hyaline membrane disease in neurates.

目的比较首剂不同剂量的肺表面活性物质对新生儿肺透明膜病治疗效果的影响。

Hydrochloric acid with a surfactant additive that is used in acidizing a well.

在井的酸化作业中所用的加有表面活性剂的盐酸。

The structure of a surfactant includes hydrophilic and hydrophobic portions.

结构的表面，包括亲水性和疏水性部分。

Half of the surfactant solutions yielded higher and faster capillary imbibition recovery than brine.

一半的那表面活性剂解决产生比较高的和快速的毛细管 imbibition 恢复超过盐水。

Experiment results showed for covering TiO〓 particles uniformly with polymer film, the inferior limit of the concentration of SDS was 1mmol/LH〓O, which provided an adsorption density higher than 0.58μmol/m〓, the superior limit was the critical micelle concentration of the surfactant.

SDS用量下限是浓度为1mmol/LH〓O，此时它的吸附密度大于0.58μmmol/m〓，用量上限是它的临界胶束浓度CMC。

I will not give up and will not call you any more at the same time.

我不会放弃，同时我也不会在给你打电话了。

China is an uneven distribution of resources cross country.

摘要我国是一个资源分布不平横的国家。