查询词典 chlorine group

Any of a group of five chemically related nonmetallic elements including fluorine,chlorine,bromine,iodine,and astatine.

锕类任何化学性质相似，原子序数在89与103之间变化的放射性元素

HeBei JiHeng Group Co.,LTD has the chemical engineering as its leading industry. it's a comprehensive company of producing. trading and scientific rearching. The major products includes chlorine.sulphuric acid .carbinol etc.which is the largest manufacturer of disinfectant in Asia, the second in the world. And it is also the largest manufacturer of persulphate salts in china, the largest manufacturer of ease pain material in north area of china.

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。

HeBei JiHeng Group Co.,LTD depends on producting chemical engineering as its leading industry. It is a comprehensive company of producing .trading and scientific rearching..The major products comprise chlorine .sulphuric acid .carbinol etc.which is the largest manufacturer of disinfectant in Asia,the second in the world. And she also is the largest manufacturer of persulphate salts in china,the largest manufacturer of analgin in north area of china.

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。

The disinfection effect on joint applications of potassium permanganate with chlorine or chloramine, and the effect on major factors of water quality are carried out systematically in the study of enhanced disinfection. The monitoring index of total count of bacteria and total coliforms group, and the water samples of prepared in laboratory and of polluted water are applied.

在强化消毒的研究中，分别以实验室配水和受污染的水为试验水样，以总大肠菌群和细菌总数为检测指标，系统研究了高锰酸钾与氯或氯氨联用消毒作用及主要的水质参数对消毒效果的影响。

Total bacterial count, total coliform group, residual chlorine and ammonia nitrogen were detected respectively.

细菌总数和总大肠菌群数测定所用水样严格按照无菌操作的基本要求进行采样。

After depolymerization of coal, its content of carbon and hydrogen decreases whereas that of chlorine,oxygen,humic acid as well as active functional group increases.

降解过程中，常常在煤分子上引入或生成新的活性基团，这些基团可大大提高煤的反应活性，为煤的进一步加工利用提供基础。

Materials and methods 1.1 General information 24 patients in this group were engaged in the operation with chlorine.

1资料与方法 1.1一般资料本组患者24例均从事于与氯气有关的操作。

DCA, or dichloroacetic acid, is an analogue of acetic acid in which chlorine atoms replace two of the three hydrogen atoms on the methyl group.

DCA也叫二氯乙酸或二氯醋酸，是一种类似乙酸的化合物，但乙基团上有两个氢原子被氯原子所取代。

Alternatively, the chlorine-containing compound may comprise a compound selected from the group consisting of ammonium chloride, methyl ammonium chloride, tetramethylammonium chloride, tetraethylammonium chloride, and combinations thereof.

或者，所述含氯化合物可包括选自氯化铵、氯化甲基铵、氯化四甲基铵、氯化四乙基铵和它们的组合的化合物。

Chlorine atoms were selectively introduced into the chlorin ring based on different reactivity between vinyl group at 3-position and 20-meso position by electrophilic addition and electrophilic substitution using hydrogen peroxide/hydrochloric acid, N-chlorosuccinimide, hydrogen chloride (or concentrated hydrochloric acid) as chlorinating reagent.

以过氧化氢/盐酸、N-氯代丁二酰亚胺、氯化氢为氯化剂，根据3-乙烯基和20-meso-位的不同化学反应活性，通过亲电加成和亲电取代反应，在二氢卟吩环上选择性地引进氯原子，完成8种未见报道的具有叶绿素-a基本碳架的氯代二氢卟吩衍生物的合成。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐