化学

Objective: To extract the volatile oil from rhizome,leaf,flower of chive by chemical method and its chemical components were identified.

目的 ：用化学方法从韭菜的根茎、韭菜叶、韭菜花中提取挥发油，并鉴定出其挥发油的化学成分。

It is based on the greatly enhancive effect of chlordiazepoxide on the chemiluminescence reaction between luminol and hydrogen peroxide in the flow system.

研究了氯氮卓在luminol-H2O2-NaOH体系中的化学发光行为，在选定的最佳实验条件下，测定了氯氮卓浓度与化学发光强度的关系。

Research to monitor the worldwide amount of chlorofluorocarbon chemicals, or CFCs, which eat away at the protective ozone layer when released into the atmosphere, suggests that more of the chemicals are out there than expected.

目前人们正在开展一项研究，目的是监视全球的含氯氟烃数量，这种化学物质在被释放到大气中之后就会侵蚀起保护作用的臭氧层。该研究表明：大气中的这种化学物质比预期的更多。

Petrology, petrologic Chemistry, and Matrix Chemical Compositions of the Ningqiang Chondrite.

宁强陨石的岩石学、岩石化学及基质的化学成份。

Chemical methods of qualitative assay and quantitative assay to Chufa functional component According to chemical characteristics reactivity of Chufa functional component, chemical method of qualitative assay and quantitative assay to Chufa functional component were built.

功能因子的定性定量化学分析针对该功能因子的化学特征反应，实验选用硫酸显色法、可见光比色法、吸光度测定法和沉淀法对功能因子进行定性、定量分析。

The results of the reaction show that better regioselectivity is obtained when Cd2+ is used as additive and give stereoselective product when cinchonine is used as chiral additive.Keywords: NaBH4, Regioselective,Stereoselective,Benzoyl acetone,Metal ion

结果发现，不同的金属离子添加剂使反应出现不同的化学选择性，而Cd2+离子对苯甲酰丙酮的还原具有较好的化学选择性，同时在辛可宁存在条件下得到了对映体过量的产物。

So, this text proceeds with characteristic of teaching of game, the game teaching of preliminary research employs the situation and employs the principle in the chemical classer , Hope to offer a teaching method of enlivening the atmosphere of the classroom for chemical classroom instructions of grade nine.

因此，本文从游戏教学的特点入手，初步研究游戏教学在初中化学课堂中应用情况及应用原则。希望能够为九年级化学课堂教学提供一个活跃课堂气氛的教学方法。

Today, has covered the entire Pearl River Delta until radiation to Guangxi, Guizhou, Henan, Hebei, Chongqing, Jiangsu, Zhejiang and Fujian provinces and cities, the ultra-large-scale cargo throughput close harmony with our domestic and foreign plastic materials manufacturers, suppliers To the relationship between the formation of Japan-wook, Toray Japan, the United States GE, Bayer, Taiwan Chi Mei, Taiwan's chemical, petrochemical wide, LG Chemical and so on and we established a long-term, friendly and cooperative relations group.

如今客户已覆盖整个珠江三角洲及至辐射到广西、贵州、河南、河北、重庆、江苏、浙江、福建等省市，超大规模的货物吞吐量亲密融洽了我们跟国内外塑胶原料制造商、供应商之间的关系，日本旭化成、日本东丽、美国GE、德国拜耳、台湾奇美、台湾化学、广石化、LG化学等都与我们建立了长期，友好的合作伙关系。

Hope a lot of companies involved in international cooperation in close harmony with the domestic plastic raw materials manufacturers, suppliers, as well as shipping, air, container, logistics and transport relations, Asahi Kasei, Toray, Japan, the United States GE, Germany Bayer , United States DuPont, Taiwan Chi Mei, Taiwan's petrochemical chemical Canton, LG Chemical, such as plastic raw materials manufacturers, such as the mainland, senior brand, all set up with our long-term friendly cooperative partnership, holds "integrity, win-win" business philosophy, alternatus comprehensive image of the company for the international publicity.

天牛公司涉及到很多的国际合作，亲密融洽了与国内外塑胶原料制造商、供应商以及海运、空运、集装箱、物流运输之间的关系，日本旭化成、日本东丽、美国 GE、德国拜耳、美国杜邦、台湾奇美、台湾化学广石化、LG 化学等塑胶原料制造商等大陆资深品牌，都与我们建立了长期友好的合作伙伴关系，秉着"诚信、双赢"的企业理念，天牛公司面向国际全面形象宣传。

Today, customers are covered by the radiation of the Pearl River Delta and up to Guangxi, Guizhou, Henan, Hebei, Chongqing, Jiangsu, Zhejiang, Fujian and other provinces and cities, a super-large cargo throughput of close harmony with our domestic and plastic raw materials manufacturers, suppliers the relationship between the Japanese Asahi Kasei, Toray of Japan, the United States GE, Bayer, Germany, Taiwan Chi Mei, Taiwan's chemical, petrochemical Canton, LG Chemical have and we have established a long-term, friendly and cooperative relations between the partners.

如今客户已覆盖整个珠江三角洲及至辐射到广西、贵州、河南、河北、重庆、江苏、浙江、福建等省市，超大规模的货物吞吐量亲密融洽了我们跟国内外塑胶原料制造商、供应商之间的关系，日本旭化成、日本东丽、美国GE、德国拜耳、台湾奇美、台湾化学、广石化、LG化学等都与我们建立了长期，友好的合作伙关系。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。