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The phase equilibrium data of SBO-FAME-Methanol, SBO-FAEE-Ethanol and Glycerol-FAEE-Ethanol systems were measured. The results indicated that it involved two different stages: liquid-liquid-solid reaction stage and liquid-solid reaction stage. When the molar ratio of methanol to oil is 12:1 at 65℃, the turning point is at a 55% biodiesel yield. The liquid-liquid-solid reaction model was proposed based on the double-membranes theory. It indicated that the process is reaction and mass transfer controlled together at the first stage, and the second stage is reaction controlled. The predictions of the model are matched with the experimental results.In the end, the acid was extracted using methanol and ethanol from jatropha curcas l oil.

测定了生物柴油制备过程中的SBO-FAME-Methanol、SBO-FAEE-Ethanol、Glycerol-FAEE-Ethanol三组分相平衡数据,表明固体碱催化过程分为液-液-固和液-固两个反应阶段,在醇油摩尔比为12:1、65℃的初始反应条件下,转化率达到55%时,为第一阶段向第二阶段的转折点;基于双膜理论建立了固体碱催化制备生物柴油的非均相液-液-固反应模型,表明两个反应阶段分别为传质、反应共同控制和反应控制,模型计算值与实验值吻合较好。

Though the analysis of all kinds of the influencing factors such as the proportion between bone glue and water, the quantity of sodium hydroxide, the time of reaction, a new modifying technics which is different from the traditional way was developed.

研究了以环氧氯丙烷接枝共聚改性骨胶的制备工艺,通过对影响该合成工艺的各种因素如水胶比、加碱量、碱解时间等的分析,初步探讨出了一条与传统改性工艺不同的改性路线。

Lead the vitriol canvasses business to lead the item of money Business enterprise brief introduction: The Hebei JiHeng group limited company with the fine chemical engineering product produce for predominate the industry, gather the section work as comprehensive sex business enterprise group of the integral whole, the main foundation chemicals contain chlorine gas, ion film alkali, diaphragm alkali, sulfuric acid, methyl alcohol...etc., is a scale of Asia biggest, the world is secondary to disinfect a production base, China is biggest to produce the base and China over the vitriol north China the biggest solution in region painful raw material in hot town medicine produces the base.

过硫酸盐招商引资项目企业简介:河北冀衡集团有限公司是以精细化工产品生产为主导产业,集科工贸为一体的综合性企业集团,主要基础化学品有氯气、离子膜碱、隔膜碱、硫酸、甲醇等,是亚洲规模最大、世界第二的消毒剂生产基地,中国最大的过硫酸盐生产基地和中国华北地区最大的解热镇痛原料药生产基地。

Monocyte chemotactic protein-3 (MCP-3) interacts with multiple leukocyte receptors: bin-ding and signaling of MCP-3 through shared as well as unique receptors on monocytes and neutrophils. Eur J Immunol, 1995; 25:2612-261711 Warrens AN , Jones MD, Lechler RI, et al.

实验中发现,重叠延伸拼接PCR过程中碱基与模板的错配率要明显高于常规PCR反应,即使使用保真性较好的聚合酶也不能避免错配的发生,而可能导致碱基序列的点突变。

It has found that the liqnids exiting in the coatings can be divided into three types: the first is composed of pure alkali sulphate molten; the second, alkali sulphate with some calcium silicates dissolved in; the third, a mix molton of alkali sulphates with clinker liquid.

研究发现,窑尾系统结皮物料中所出现的液相共有三类。一类是主要是纯硫碱熔体;第二类为部分熔有硅酸钙的硫碱熔体;第三类为有部分熟料液相参与的混合液相。它们在结皮过程中扮演不同的角色。

Under atmospheric pressure, binary nanocrystalline sulfides and selenides such as CdS、CdSe、PbS、 PbSe、Cu〓Se、Ag〓S、Ag〓Se、SnSe are obtained at room temperature; nanocrystalline CdTe and PbTe are obtained by heating. Nanocrystalline NiSe〓、CoSe〓 and FeTe〓 are obtained by hydrothermal conditions.

根据硫、硒歧化的碱溶液与碲歧化的碱溶液稳定性的不同,发现在室温条件下可成功获得CdS、CdSe、PbS、PbSe、Cu〓Se、Ag〓S、Ag〓Se、SnSe等二元硫化物与硒化物纳米晶;加热条件下可成功获得CdTe与PbTe纳米晶;而NiSe〓、CoSe〓及FeTe〓的合成则要在水热条件下进行。

Two couples of primers were synthesized according to the sequence of the pelA gene. They are used to prove that the pelA gene obtained from NTT33 by PCR.

根据核苷酸序列分析结果设计引物,通过PCR的方法,在嗜碱芽孢杆菌NTT33的总DNA和p1350中分别扩增到预计大小的片段,证明pl350中的外源DNA片段来自於嗜碱芽孢杆菌NTT33。

The results, obtained by chemical analysis, Xray diffraction and scanning electron microscopical observation of the process concerned and products, show that the process flowsheet is simple and can be used to prepare basic zinc carbonate for producing activated zi...

结果表明:该工艺过程简单,得到可制备活性氧化锌的碱式碳酸锌;磁场作用对碱式碳酸锌的结构及热解产物的粒度产生了有利于活性氧化锌制备的影响。

Furthermore, the structures of DNA molecules varying with concentration of new modification agent were studied, and it was found that when the new modification agent concentration was 1:1000, DNA molecules were successfully fixed and extended on the modified mica surface and well-distinguished DNA strands were imaged by AFM.

并进一步观察了不同DAPS浓度下DNA分子的吸附行为,发现当DAPS/甲醇体积比浓度为1:100时,DNA分子呈现出大而复杂的形态,发生了分子内和分子间的碱基相互配对;当体积比浓度为1:3000时,即没有分子内和分子间的碱基相互配对,也

Ammonia in the compound solution of amino acid must be removed before L-Arg will be extracted from such solution.

从氨基酸复合液中提取L-精氨酸要进行赶氨,将常见的几种碱在不同温度下对L-精氨酸稳定性的影响进行研究,找出在适宜的工艺操作温度下用于赶氨的碱。

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