溶剂

The technique of membrane filtration is used whenever the nature of the product permits; that is, for filterable aqueous preparations, for alcoholic or oily preparations, and for preparations miscible with, or soluble in, aqueous or oily solvents, provided these solvents do not have an antimicrobial effect in the conditions of the test.

只要该产品的性质许可，就应使用膜过滤法；这些性质是，可过滤的水溶性配制品、酒精或油性配制品、易混合或溶解于水或油性溶剂的配制品，只要这些溶剂在试验条件下没有抗生素效果。

So it has made the great progress. The method studied in this research from o-Dichlorobenzene is a ideal route to synthesize 2,4- dichlorofluorobenzene, which has temperate condition easy to control,safe process,low cost and good quality of products; The method of Phase transfer catalysis fluorination without solvent is better than present technology in presence of DMSO as solvent in many aspects; In a word,it is worth being promoted by the domestic correlative factories.

本课题所研究的以邻二氯苯为原料的2，4-二氯氟苯合成路线反应条件温和，工艺容易控制，生产安全，而且产品质量好，是比较理想的合成路线；以季胺盐为催化剂的无溶剂相转移催化氟化法与溶剂法相比具有明显的优势；通过实验确定的工艺条件对工业化生产有重要的指导意义，可提高以邻二氯苯为原料的工艺路线的市场竞争力。

We chose formamide as a solvent for the preparations because itdissolves all of the reagents, and because the binary phase diagram of surfactants informamide resembles that of water.

我们对不同的有机溶剂中中介结构硫化钨的合成进行了研究，发现极性溶剂更有利于中介结构硫化钨的合成。

Effect of stuff-to-solvent ration of cross-current extraction of furfural aqueous solution was studied in this paper.

本文研究了原料/溶剂对错流萃取糠醛的影响，通过四级错流萃取试验并采用相分配系数法用UNIQUAC模型进行模拟计算，确定以溶剂比2。

The relationship of reactants, transition states, intermediates and products in affirmed by IRC. In order to study the influence of solvent, the reactions is optimize and calculate by SCRF at the same level of gaseous phase adopting Onsager model.

为研究溶剂的影响，采用基于Onsager模型的自洽反应场理论，在与气相相同的计算水平(B3LYP／6-311+G~*)上，分别进行溶剂的SCRF全优化计算。

The best yields are obtained if the ether solvent is distilled from the Grignard under vacuum and replaced with hydrocarbon solvent, such as benzene.

最好的产量得到醚溶剂，如果是从格氏蒸馏真空和烃类溶剂，如苯，取代。

The results showed that polar acetone was beneficial to the desorption of methanol, however the effect of nonpolar heptane on the extraction of methanol was more evident.

研究表明，极性溶剂丙酮能够促进甲醇脱附，而非极性溶剂正庚烷对孔道中甲醇有更强的萃取能力。

In thepreparation of nickel sulfides, nanocrystalline NiS〓 was prepared by solvent-thermaltechnology. By adding a reductive atmosphere in the system, hexagonal phase NiS,which is a metaphase and stable at high temperature, was formed. TEM shows that theparticles are in nanorod shape.

在甲苯中合成了球形的NiS〓纳米粉，并通过还原气氛的调节制备出NiS亚稳相的纳米棒(1000x15nm)，通过前驱物的改变，我们在还原性气氛中还制备出Ni〓S〓纳米粉；同时我们在实验中还发现溶剂对产物的形貌有很大的影响，在乙二胺中作溶剂，分别得到立方形CoS〓和NiS〓及FeS〓纳米棒。

The effects of different factors on the laser-induced graft polymerization on the PET surface were analyzed, and the mechanisms were discussed. The factors were: 1 Monomers with smaller molecules resulted in better modification than polymeric monomers. Acrylamide monomer was chosen as hydrophilic modifier finally; 2 Higher concentration of the monomer solution favored the graft reaction; 3 With the increasing laser fluence, the surface hydrophilicity of PET films increased at first, then decreased. More laser pulses led to a more hydrophilic surface; 4 Benzophenone as a photosensitizer hindered the graft polymerization; 5 The homopolymer retardant of ammonium iron sulfate hexahydrate in a proper concentration retarded the formation of homopolymers and promotes the graft copolymerization; 6 The solvent of monomer solution also affected the graft reaction. Different solvents functioned in different ways. Ethanol can promote the graft reaction because of the activity of hydrogen in its structure; 7 pH value of the monomer solution affects the polymerization rate, and a lower pH value was favorable to the graft reaction.

这些影响因素的作用分别为：1小分子单体的表面改性效果好，确定以丙烯酰胺为亲水性改性单体；2较高的单体溶液浓度有利于接枝反应；3激光能量密度增大，薄膜表面亲水性先显著增强，后又减弱；激光脉冲次数越多，改性后表面亲水性越强；4光敏剂BP对PET表面接枝聚合反应有阻碍作用；5适当浓度的均聚物抑制剂六水合硫酸铁铵能减少单体均聚物的生成，促进接枝聚合；6单体溶液的溶剂也影响接枝聚合的反应进程，不同溶剂的影响作用原理不同，含较活泼氢的乙醇能促进接枝反应；7溶液pH值影响单体聚合速率，pH值较低有利于接枝反应。

The optimum temperature is 35℃ when solvent is hexane and 30℃ when solvent is butylacetate.

以已烷为溶剂时，最佳温度为 35℃，以乙酸丁酯为溶剂时，最佳温度为30℃。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。