查询词典 chemical

Dry chemical methods is more reliable than wet chemical methods in chylemia detection.

在乳糜血检测中干性化学法与湿性化学法比较更接近真实值。

In this paper,the research history of microscale chemical experiment is briefly introduced,the preparation of cinnamic acid by means of microscale apparatus is investigated,and the characteristics of microscale chemical experiment and the optimum conditions are studied.

简单介绍了微型化学实验的研究历史，并以肉桂酸的制备实验为研究对象，分析了微型有机化学实验的特点，研究了肉桂酸制备的微型实验的最佳反应条件。

Nutrition solution culture, ICP-AES, the differential centrifugation technique and sequential chemical extraction method, suppression subtractive hybridization , RAPD were used in this thesis to study the mechanisms of copper tolerance and accumulation by Commelina communis grown in copper mine deposit which was reported to be a Cu hyperaccumulator, compared with C. communis grown in normal soil. Several aspects were examined, including: difference of copper tolerance and accumulation between C. communis grown in copper mine deposit and that grown in normal soil; difference of growth and nutrient accumunation between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; physiological differences between between C. communis grown in copper mine deposit and that grown in normal soil under copper treatment; subcellular distribution and chemical forms of Cu in C. communis; identification of cDNA fragments differentially expressed in C. communis grown in copper mine deposit; genetic diversity and copper tolerance of C. communis, tolerance mechanisms to copper in C. communis are discussed.

中文题名鸭跖草对铜的耐性机理和富集特征研究副题名外文题名 Mechanisms of Cu tolerance and accumulation by Commelina communis 论文作者廖斌导师蓝崇钰束文圣学科专业环境科学研究领域\研究方向学位级别博士学位授予单位中山大学学位授予日期2003 论文页码总数128页关键词重金属污染植物修复超富集植物土壤污染铜污染鸭跖草馆藏号BSLW /2003 /X53 /12 论文以本实验室报道的生长于矿山上的铜超富集植物鸭跖草和生长于正常土壤中的鸭跖草为试验材料，分别运用溶液培养法、ICP-AES元素测定技术、差速离心法和化学试剂逐步提取法、抑制消减杂交技术、RAPD技术研究了矿山和非矿山两种生境鸭跖草对铜的耐性和吸收积累的差异，两种生境鸭跖草在铜胁迫下养分吸收和积累的差异，两种生境鸭跖草在铜胁迫下生理反应的差异，以及铜在鸭跖草细胞内的分布及结合形态研究，矿山鸭跖草差异表达的cDNA克隆，铜对鸭跖草种群遗传分化的影响，从这几个方面探讨了矿山鸭跖草对铜的耐性机理。

Horny layer is the outmost layer of epidermis, its thickness is decided by different parts of human body, it's about 0.02mm at the thinnest parts, and 0.5mm at the thickest. It is made up of 5-10 layers of enucleated cornified cells that contains keratin and horny fat, which has the capability of resisting weak acids and weak bases , they array closely and become a natural barrier to moisture content and some chemical substances, so as to prevent the water logging of bodily fluids and endosmose of chemical substances.

角质层是表皮的最外层，其厚度依身体部位的不同而定，最薄处约0.02mm，最厚处约0.5mm由5-10层含有角蛋白和角质脂肪的无核角化细胞组成，角质层细胞有抵抗弱酸弱碱的能力，角质层细胞排列紧密，对水分及一些化学物质有天然屏障作用，因而可以阻止体内液体的水渗和化学物质的内渗。

The equivalent standard pollution loadings were compared among different rigions, the results indicated that the water pollution threaten caused by agricultural non-point source pollution was more serious in the south of Jiangsu province and in Nantong than in the other rigions;The equivalentStandard pollution loading rates of different agricultural non-point source pollution in different regions were analysised by clustering analysis method,and the results indicated that Nanjing、 Wuxi、 Zhenjiang and Changzhou were polluted mainly by domestic living pollution;Xuzhou、 Suqian、 Taizhou、 Yancheng、 Lianyungang、 Huaian and Nantong were polluted mainly by chemical fertilizer pollution; Suzhou and Yangzhou were polluted corresponsively by animals feces pollution 、 domestic living pollution、 chemical fertilizer pollution and fish breeding pond pollution.

对各地区的等标污染指数进行比较，发现农业非点源污染对水环境造成的威胁苏南地区和南通明显高于其它苏中、苏北地区；对各个市各非点源污染源的污染负荷率进行聚类分析，发现南京、无锡、镇江、常州以生活污染为主；徐州、宿迁、泰州、盐城、连云港、淮安、南通以化肥污染为主；苏州、扬州两地畜禽粪便污染、生活污染、化肥污染和精养鱼塘污染均占一定的比例。

Today, chemical warfare and chemical terroristic attack have been important military problems about security encountered factually by the international society, which is one of the important problems that our army will face in intending informatization warfares and counterterror battles.

当今，化学战和化学恐怖袭击已经成为国际社会实际遇到的重大军事与安全问题，也是我军在未来信息化战争和反恐怖斗争中所面临的重要问题之一。

With the rapid development of industries,more and more complicated chemical is used,which lead to creasing waste water,there are a lot kind of harmful chemical materials contained in waste water.

快速发展的工业越来越多地采用各种复杂的化学方法，从而使废水大量增多，而很多废水中含有种种有害的化学物质。

Chemical fibre machines are our main business scope. Our major products involve chemical fibre Spinning Machine, Baler, and Crimper and Cutter which possess important position in domestic market. Polyester Staple Crimper/Cutter/Baler and viscose Spinning Machines have been exported to many countries such as India, Pakistan and Thailand.

邯郸宏大化纤有限公司主要营业范围为化纤机械，主要产品有化纤系列纺丝机、打包机和各类化纤卷曲机、切断机等，在国内市场上占有重要地位，涤纶系列卷曲、切断、打包机、粘胶短纤纺丝机还曾出口到印度、巴基斯坦、泰国等国家。

The acetic aldehyde is produced upon oxidation with alcohol as raw material. It is an intermediate product for producing acetic acid and crotonaldehyde, and also basic chemical and important intermediate for chemical products with vast use.

乙醛是以酒精为原料氧化生成，它是生产醋酸和巴豆醛的中间产品，又是用途极广的基础化工原料和重要的化工产品中间体。

It is well known that macro mechanics, physical and chemical performances of materials are determined by their microstructures, cystal structures and chemical compositions. Therefore, it is very important for the study of microstructures.

由于材料的宏观力学，物理和化学性质是由其组织形态和微区化学成分所决定的，因此梯度功能材料的微观组织研究非常重要。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。