查询词典 ammonia process

METHODS 3-methoxy-7α-methylestra-1,3,5(10)-trien-17β-ol was reducted with lithium and ammonia,then the intermediate was hydrolyzed in oxalic acid and reacted with malonic acid to get 3,3-dimethoxo-7α-methylestra-5(10)-en-17-ol(compound 4),which was oxidated by pyridium bichromate ,reacted with acetylene,and hydrolyzed in oxalic acid again to get the product tibolone.

方法以3-甲氧基-7α-甲基雌甾-1，3，5(10)-三烯-17β-羟基为起始原料经锂胺还原、草酸水解、缩酮化得3，3-二甲氧基-7α-甲基雌甾-5(10)-烯-17β-羟基(化合物4)，然后用温和的氧化剂重铬酸吡啶盐氧化、炔化、再水解得目的产物。

According to the characters of bittern extraction, transportation, and follow-up Ammonia-soda industry of Jiangsu Oilfield, we studied the Synthetic methods and conditions ...

根据江苏油田的采出、输送卤水和后续氨碱工业生产的特点，研究了聚天冬氨酸PASP和有机膦酸LZ-06阻垢剂的合成方法和条件。

A compound derived from ammonia and containing the bivalent NH group combined with a bivalent nonacid group.

亚胺源自氨的一种化合物，含有与一个二价非酸基结合的氨基

There are seasonal variations of oxygen consumption rates, ammonia and phosphorus excretion rate of bivalves in Sanggou Bay.

桑沟湾滤食性贝类养痕对环境的影响及其生态调控③对长牡砺C.g子ga，代谢率的季节变化进行了研究。

In recent years, the companies insist on the one hand and the deepening of enterprise reform with one hand and technology and the use of new technologies, the main products in the development of ammonium bicarbonate, liquid ammonia, the basis of SSP has developed a well-known trademarks of Jinzhong City,"Jin burning "brand 5 series more than 40 species of regulation of the entire cast iron cooking stove warming more, all cast iron hot water boiler, hot water boiler environment-friendly, such as atmospheric pressure and" Yu-tai "brand PJ80-style shoulder cannon fire, PJ120 rack gun fire, fire bombs first domestic product, artillery fire in Shanxi Province have been focused on new product year 99 projects in 2000 included the states key projects.

近年来，公司坚持一手抓深化企业改革，一手抓技术改造与新技术的运用，在发展主产品碳酸氢铵、液氨、过磷酸钙的基础上，先后开发了晋中市知名商标"晋燃"牌5大系列40余个品种的全铸铁调节炊暖多用炉、全铸铁热水锅炉、环保型常压热水锅炉等及"泰宇"牌PJ80肩负式灭火炮、PJ120支架式灭火炮、灭火弹等国内首创产品，灭火炮获山西省99年度重点新产品项目，列入2000年国家重点计划项目。

Boracic acid and mixed indicator are used as the solution to absorb ammonia.

本文采用微型化学实验方法，选择硼酸混合指示剂作为吸收氨气的溶液，当溶液变为碱性时，指示剂马上由红紫色变为亮绿色。

The result of study showed:1 The effect of some inorganic urea inhibitor enzyme indicated boracic acid inhibits the activeness of urea enzyme in soil well, delayed the speed of urea hydrolysis in the soil and decreased the volatilization of ammonia , boracic acid,can be chosen as a inorganic urea enzyme inhibitor.2 The effect of some organic urea inhibitor enzyme showed that the dissociative Humic Acids of turfy soil and weathered coal inhibit the activeness of urea enzyme in soil well.

室内模拟试验，对几种缓释氮肥的释氮研究表明，和其它几种氮肥相比，PCF和PSF的控氮时间都较长。 6。盆栽试验表明，PCF的释氮效果比其它缓释氮肥的要好，且在油菜生育的各个时期，释氮都较充足，是适合油菜的良好缓释氮肥。

If the thing of the past must be placed in the additions of borax solution of ammonia in order to remove.

如果过去的事情，必须放置在氨硼砂溶液补充，以消除。

Examples of humectants include lactic acid, urea (the urea found in creams is synthetically produced by combining one molecule of carbon dioxide with two molecules of ammonia and not obtained from urine), hyaluronic acid (able to retain 1000 times its weight of water), propylene glycol, glycerin, sorbitol, gelatin, lecithin, sodium pyrrolidone carboxylic acid, and butylene glycol.

常见的湿润剂有乳酸，尿素（面霜里的尿素来自于二氧化碳和氨分子的合成而不是从尿中提取的），透明质酸（能保持自身成分1000倍的水分），丙二醇，丙三醇，山梨糖醇，明胶，卵磷脂，吡咯钠，羧基酸和丁二醇。

Oak given a weathered appearance by exposure to fumes of ammonia; used for cabinetwork.

用氨熏过的栎木，有被侵蚀的外表，用于细木工。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。