查询词典 purification

A series of pilot experiments of runoff pollution purification were conducted on riparian buffer strips covered with Cynodon dactylon at different slopes of 2, 3, 4, and 5%.

在前期资料调研、小试试验和基地选址的基础上，选择百慕大草皮构建了2％、3％、4％和5％四种不同坡度结构的滨岸缓冲带试验基地，开展径流污染物净化效果现场试验。

In this paper,Cyperus alternifolius.L,Cana generalis Bailey,and Typha orientalis Presl on floating bed were used to study the compatibility and the purification effect of pollutants in the landscape original water of Sanzhoutian Resevroir in static condition.

本文以美人蕉、风车草和香蒲作为受试植物，在实验室采用浮岛种植的方式，以三洲田水库景观水体原水为试验水样，在不流动的静态条件下通过测定水体中污染物浓度的变化来研究受试植物的适应性及其净化效果。

Methods:Use methods such as take off protein,calcium,colour,deacetylate and purification to prepare chitosan to study deacetylate degree,molecular weight and other characters of chitosan,then compare with infrared spectrum of bio-chemical chitosan on market.

用脱蛋白、除钙、脱色、脱乙酰基、纯化等方法制备壳聚糖，研究其壳聚糖的脱乙酰度、分子量等性质，并与市售生化级壳聚糖的红外光谱进行比较。

Use methods such as taking off protein,calcium,colour,deacetylate and purification to abstract and preparing chitin and chitosan from Xuyu's local lobster shell.The technology,equipments,operation are simple and have strong popularization.

用本法从地产盱眙龙虾的虾壳中提取甲壳素和制备壳聚糖工艺设备简单，操作简易，具有较强的推广性；地产盱眙龙虾的虾壳含甲壳素较高，是一种制备壳聚糖不可多得的天然资源，值得开发利用。

objective:with the local lobster shell as the raw material,we inquire into the abstraction and preparation of chitin and chitosan to develop a new raw material resources for chitosan.methods:use methods such as take off protein,calcium,colour,deacetylate and purification to prepare chitosan to study deacetylate degree,molecular weight and other characters of chitosan,then compare with infrared spectrum of bio-chemical chitosan on market.results:the chitin and chitosan obtained from lobster shell are 14.8% and 8.9%, respectively.

目的：以地产龙虾壳为原料，探讨其甲壳素的提取和壳聚糖的制备方法，以开发壳聚糖制备的新原料资源。方法：用脱蛋白、除钙、脱色、脱乙酰基、纯化等方法制备壳聚糖，研究其壳聚糖的脱乙酰度、分子量等性质，并与市售生化级壳聚糖的红外光谱进行比较。

The other technical indexes are also accordance with document.conclusion:use methods such as taking off protein,calcium,colour,deacetylate and purification to abstract and preparing chitin and chitosan from xuyu's local lobster shell.the technology,equipments,operation are simple and have strong popularization.the chitin abstracted from xuyu's local lobster shell is rather high,it's a natural resources to prepare chitosan and is worth to exploit and utilize.

用本法从地产盱眙龙虾的虾壳中提取甲壳素和制备壳聚糖工艺设备简单，操作简易，具有较强的推广性；地产盱眙龙虾的虾壳含甲壳素较高，是一种制备壳聚糖不可多得的天然资源，值得开发利用。

It only need one-step,which consumedly decurtate the purification cycle of NGF, and increase the yield of NGF .

该方法为NGF的大量提取提供了技术支持。

The average recover rate is 95.4% and RSD is 3.5%. The average content of sciadopitysin is0.147%(RSD is 2.86%). 5.The technology to rich the total flavonoids in branches and leaves of Taxus yunnanensis. Methods:(1) To extract the sample by sonication;(2) Study the technology of extract and defat with L9 (3~4) orthogonal test;(3)Study the process of purification by macroporous resin: containing resin type, liquor concentration, the category and quantity of eluant.

云南红豆杉中总黄酮富集工艺的研究方法：(1)确立用超声法初提药粉；(2)用L9(3~4)正交试验考察脱脂和醇提的工艺参数；(3)用大孔树脂研究总黄酮的富集工艺：考查树脂类型、上样液浓度、洗脱曲线等。

The copolymers with high molecular weight synthesized from 2-acrylamio-2-methyl propane sulfonic acid and acrylic acid or acrylamide or other water soluble monomers can be used to purification of wastewater and as the dehydrant of organic slurry.

2-丙烯酰胺基-2-甲基丙磺酸和丙烯酸或丙烯酰胺等水溶性单体的高分子量共聚物，可用于废水的净化，还可作为有机污泥的脱水剂。

Plant Virology 2 S T. H. Chen, FThe course will give conventional and molecular level of plant viruses in order to help the students to get much theoretical and practical knowledge about plant virology. The contents cover the molecular structure of virion and genome, virus isolation, dentification and purification, transmission, variation,ecology, nomenclature and classification, diagnosis and control.

本课程除传统植物病毒学范畴外，并涵盖从分子层次讨论植物病毒之构造，引起之植物病害，田间发生及防治，期能达到理论与实务并重；内容包括植物病毒分子层次的构造及核酸组成，病毒分离、鉴定与纯化，在寄主体内之增殖及转移，媒介传播、遗传及变异，其引起之病害及田间发生生态与防治。

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