甲胺

The synthesis method comprises the following steps: adding 2-( 5-(dimethylamino methyl- 2- furyl methyl sulpho ethylamine and 1- methylthio- 1- methylamino- 2- nitro ethylene with a molar ratio of 1.04: 1 into water, heating to 48- 52 Deg. C, reacting 4.5 hours with a vacuum degree of 0.02- 0.05 MPa, cooling, adding sodium-hydroxide of concentration of 10% to regulate the PH value to 11.0- 11.4, filtrating and cooling the filtrate to 0- 2 Deg. C, crystallizing for 12 hours, centrifugally filtrating, and rinsing filter cake with purity water to prepare wet ranitidine alkali; dissolving ranitidine alkali in alcohol and reacting with chlorhydric acid to prepare ranitidine hydrochloride.

合成方法包括：将摩尔比为1.04∶1的2-(5-(二甲氨基甲基-2-呋喃基甲基硫代乙胺与1-甲硫基-1-甲胺基-2-硝基乙烯加入水中，升温至48-52℃，于真空度0.02～0.05MPa反应4.5小时，反应完毕降温，用10％氢氧化钠溶液调pH＝11.0-11.4，抽滤，滤液降温至0～2℃，结晶12小时，离心甩滤，用纯化水漂洗滤饼，得雷尼替丁碱湿品；将雷尼替丁碱溶于乙醇中与盐酸反应，制备得到盐酸雷尼替丁，产品符合欧洲药典标准。

The HPLC methods for analysis of N--ribitylxylidine and N-methyl glucamine were established. After optimizing the operation conditions, the principal product and main impurities were well separated. And they were determined by LC-MS. The operation condition of N--ribitylxylidine is, columniation temperature is 30℃, flow rate is 0.7mL/min, UV wave is 244nm, the mobile phase is methanol: water=40: 60 .

首次建立了对葡甲胺和核糖胺的高效液相色谱分析方法，通过对色谱操作条件的优化，成功分离了主产物和杂质，在此条件下，应用液相色谱-质谱联用仪对糖基胺及生成杂质进行了指派定性，并测定了两种糖基胺及其主要杂质的含量，获得了满意的结果。

The deoiling effect of the polymerized additives has been evaluated by means of aerated floatation process.The result shows that when dimethylamine,diethylamine or methylamine serves as amine and the molar ratio of ...

利用充气浮选法对所合成的药剂进行了除油效果的评价，结果表明：当胺为二甲胺、二乙胺、甲胺，聚合单体与环氧氯丙烷的摩尔比为1：2时，产品的除油效果最佳。

Influences of feedstock ingredients and ratio, water content on methylamine production were analyzed.

分析了在甲胺生产过程中，配料的组成、水含量、配比对甲胺生产的影响。

The integration of the methyl group of methylamine, based on the internal standard of the methylene group of ethanol, was measured and from which the amount of methylamine in the solution as well as the time that required can be derived.

以乙醇的亚甲基为内标，测量各种溶液情况下甲胺碳峰的积分值，可以判断该溶液甲胺所含的重量，以及达成某浓度所需通气时间。

Two degrading methamidophos bacteria strains were isolated from the soil, they were identified as Staphylococcus capitis and Alcaligenes faecalis., and named as strain D and strain J.Methamidophos residues in soil were determined by gas chromatography.

从土壤中分离筛选获得两株对甲胺磷农药有较强降解效能的甲胺磷降解细菌，经鉴定分别为头状葡萄球菌和粪产碱菌。

Though amines have beenstudied by MPI to a certain degree, there are few reports about the five kinds of moleculesstudied in this dissertation: methylamine, ethylamine, dimethylamin,propylamine and diethylamine molecules.

虽然关于胺类分子的MPI已经有一些研究，但关于本论文研究的五种分子——包括甲胺、乙胺、二甲胺、丙胺和二乙胺的工作很少有报道，大部分结果都是首次得到的，这些结果获得了有关简单烷烃胺类分子MPI过程的更全面详细的认识。

It is characterized in that: 2-( 5-(dimethylamino methyl- 2- furyl methyl sulpho ethylamine reacts with 1- methylthio - 1- methylamino- 2- nitro ethylene directly in water phase, crystallizing and separating out ranitidine alkali.

其特征在于：它是由2-(5-(二甲氨基甲基-2-呋喃基甲基硫代乙胺与1-甲硫基-1-甲胺基-2-硝基乙烯直接在水相中反应并结晶析出雷尼替丁碱。

Compared with the controls, both 10.0-10 000.0 μgL^(-1) of methamidophos and 100.0 μgL^(-1) of 17β-estradiol increased the mean population growth rate significantly.0.1-10 000.0 and 10.0 μgL^(-1) of methamidophos decreased significantly the average ratio of ovigerous to non-ovigerous females and the average mictic rate, respectively, and 1000.0 μgL^(-1) of 17β-estradiol decreased the total resting egg production significantly.

与对照相比，10.0~10000.0μgL^(-1)的甲胺磷和100.0μgL^(-1)的17β-雌二醇均使轮虫的平均种群增长率显著提高；0.1~10000.0和10.0μgL^(-1)的甲胺磷分别显著地降低了实验期间轮虫种群中的携卵雌体数／非携卵雌体数和混交雌体百分率的平均值；1000.0μgL^(-1)的17β-雌二醇显著降低了轮虫的休眠卵总产量。

Results indicated that pesticides show different variability in certain extent in relative response between different matrixes. Certain pesticides are matrix-dependent such as chlorothalonil, paraoxon, deltamethrin, methamidophos, acephate etc, among them, chlorothalonil have better relative response in acidic matrixes (as orange, tomato, grape, kiwi fruit) but have serious suppression in scallion, onion, garlic, leek, lotus root etc.

结果表明，各农药相对响应值具有不同程度差异，个别农药显示了较强的基质依赖特点(如百菌清、对氧磷、溴氰菊酯、甲胺磷、乙酰甲胺磷)；其中百菌清在酸性基质橙子、番茄、葡萄、猕猴桃、蘑菇中稳定，其基质对百菌清起到了保护性作用，且能够抑制或减少溴氰异构体2向异构体1的转化；而在大葱、洋葱、蒜、藕、梨等基质中存在显著的降解或抑制作用。

The reasons of iron ions content overproof in grade Ⅱ desalting water system,such as variation water quality,contamination of regenerant , operation adjustment of pretreatment system and switching operation of bed were discussed.

对二级脱盐水系统中铁离子含量超标的原因，如来水水质发生波动、再生剂受到污染、预处理系统操作调整、床体运行切换等进行了论述。

You were hired to drum up new business, so go and do it.

公司雇你招徕新业务，你就做你的事好了。