A review with 32 references is given on the present research situation of new products , extraction , purification and modification of the natural poly - functional edible pigment . its developing trend also analysed 摘要介绍了天然多功能食用色素的新品种、制备方法、纯化方法和改性研究的进展，并分析了天然多功能食用色素的发展趋势。
And through combining of all the isolation and purification methods , we obtained a best scheme , overcome a long - term bottleneck for the exploitation and utilization of myxobacteria resources 对各种分离纯化方法进行优化组合得到最适用的分离纯化方案，克服了长期以来一直制约粘细菌研究的一个瓶颈，为此类微生物资源的开发利用奠定了基础。
The research advances of the anthocyanins pigment from purple sweet potato are described , including the physiological activity , the methods of extraction and purification and composition analysis 摘要概述了国内外关于紫甘薯花色苷色素的研究进展，包括其生理活性、色素提取和纯化方法、含量测定以及组分分析，为该色素的进一步开发利用提供依据。
One is a combination of ion exchange chromatography on q sepharose ff , hydrophobic interaction chromatography on phenyl hp , gel filtration chromatography on sephadex 200 and higher resolution ion exchange chromatography on mono q . the other is a combination of ion exchange chromatography on q sepharose ff , two affinity chromatography on con a sepharose 4b and benzamidine sepharose 6bcl sequentially 上清液中重组蝗蛇毒类激血酶的纯化是通过设计的不同分离纯化方法组合进行的，并对每一种组合进行了活力与纯度及口收率的评价，结果表明两种组合方式都具有一定的实用性和可操作性。
A new purified method for carbon nanotube was put forward . 2 . study of aligned multi - wall carbon nanotube layered multi - wall carbon nanotube arrays were synthesized firstly directly on the surrounding of the reaction quartz tube , in a ar / h2 atmosphere by pyrolysis of ferrocene in xylene into a suitable reaction furnace with cobalt powder in 与根据碳纳米管的物理、化学性质，提出了一种全新的碳纳米管纯化方法：先对制备的碳纳米管于500在空气中氧化30分钟，然后用18的盐酸煮20分钟，最后将样品稀释，过滤，再用去离子水过滤3次，烘干，便可得到纯的碳纳米管。
The content of this paper contains : chapter one introduces the basic concepts , developing course , research significance , application foreground and the present research state of other countries in the world . chapter two introduces the structure characteristic and the performances and applications in the areas such as mechanics , physics and chemistry , then analyzes the present state , existing problem and developing trend of nanotubes research . chapter three introduced several synthesis methods and purification methods of nanotubes and nanofibers detailedly . chapter four concentrates on the research of two foreign research groups who use carbon - hydrogen gases flames to produce carbon nanotubes 论文的主要结构如下：第一章介绍了纳米材料科学的基本概念、发展历程、研究意义、应用前景及世界各国的研究现状。第二章阐述了碳纳米管的结构特征以及力学、物理和化学等各方面性能和应用，并且分析了碳纳米管这种新型碳材料研究目前现状、存在问题及发展趋势。第三章详细介绍了碳纳米管和碳纳米纤维的几种传统制备方法及纯化方法。
The respiratory intensity of the contaminated soil decreased by 29 . 93 % while ammonification and nitrification increased significantly than that of control soil . 2 . extraction and purification of soil microbial total dna a method of extracting soil total dna was developed , and it can extract dna from g + bacteria 二、土壤微生物总dna的提取和纯化方法研究为了采用不依赖于培养的16srdna分析的方法研究有机磷农药长期污染对土壤微生物群落结构的影响，建立了从土壤中提取总dna的方法，并通过改进使适合于对革兰氏阳性菌的提取。
The soil samples collected from yunnan , hebei , qinghai and other regions of china , and also from vietnam , were used as the materials in this experiment . and dung pellets of rabbits or goats that had been autoclaved can be used to induce many kinds of fruiting bodies of the myxobacteria in different colors , sizes , and shapes . we isolated and purified strains under traditional procedure 本实验以越南及我国云南、河北、青海等地的土壤作为研究材料，利用兔、羊粪球等诱导出多种粘细菌的子实体，除利用经典的粘细菌分离纯化方法外，还根据粘细菌的生物学特性进行了分离纯化方法上的创新和改良。
