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纯英文,但是很短,言简意赅!阐述角度独特,每书写一部分,都从Editor/Reviewer角度提出质疑 “Prosecution case”,然后从writer的身份谈如何避免常犯错误!不仅适合刚刚开始写论文,一头雾水的新虫;还能帮助老手更加合理布局全文,抓住Editor和Reviewer真正想看到的!!虽然短短三页纸,字字珠玑;真正读懂后,能够轻松分清每部分该写什么,大刀修掉没有Contribution的赘述!!!楼主拜读N次,每次都有新收获;不敢独享,与虫友分享,喜欢请不吝顶起http://emuch.net/bbs/images/smilies/tiger/05.gif“Guide to writing a good paper”:,从几个方面手把手教,比如说:(1) Need (Editor/Reviewer角度想要看到的“文章的意义/贡献”:) . What is the context for the research work? What would we like to be able to do in practice that we don’t know how to do at present?Prosecution case (Editor/Reviewer角度的质疑):• This research is not important• The problem is too specific and clearly does not lead to transferable knowledge(2) Analysis of existing work ( 做Introduction部分的文献综述的目的 ). There are two purposes to examining previous work: to summarise previous work in the area (what knowledge exists in the area and is relevant to the need defined above), and to.....详见附件:[
请教一下各位:搅拌器的搅拌叶是三叶型的好分散些还是齿轮型的好分散些呢?
维权声明:本文为linda_judica原创作品,本作者与仪器信息网是该作品合法使用者,该作品暂不对外授权转载。其他任何网站、组织、单位或个人等将该作品在本站以外的任何媒体任何形式出现均属侵权违法行为,我们将追究法律责任。某植物中茶多酚提取、分离工艺研究摘要:目的:通过比较建立一种良好的提取三叶虫茶中茶多酚提取工艺及初步分离方法。方法:加原料10倍量的80%乙醇,微波浸提2次,减压蒸馏回收乙醇,抽滤,分别以石油醚,氯仿,乙酸乙酯萃取,减压蒸馏回收乙酸乙酯过聚酰胺层析柱,以不同梯度乙醇洗脱,洗脱液减压浓缩,再过硅胶层析柱,以不同极性洗脱液洗脱。结果:基本能得到较单一的成分。结论:以此法对虫茶中茶多酚进行的提取分离效果较好。关键词:茶多酚;提取;分离;聚酰胺;硅胶;Abstract Objective: Through the comparision of the two methods for extract the Tea Polyphenols in Trilobita Tea and the research for separation method obtain the best extraction craft and the preliminary separation method; Method: Adds 80% alcohol of 10 times raw material amounts, the microwave extract 2 times, the reduced pressure distillation recycling ethyl alcohol, pulls out filters, respectively extracted by the benzene, the chloroform, the ethyl acetate, after the reduced pressure distillation recycling ethyl acetate, crossed the Polyamide chromatographic analysis column, eluted by the different gradient ethyl alcohol, the fluid through reduced pressure concentration, crossed the Silica gel chromatographic analysis column, elutes by the different polarity fluid; Results: Can get more unitary component basically; Conclusion: The effect of the method for extraction,isolationz Tea Polyphenol in Trilobita tea is fairly good. Key words: Trilobita Tea; Tea Polyphenols; Extraction; Isolation;Polyamide; Silica gel. 植物饲养米缟螟幼虫(米黑虫),取其排泄物加工成为茶饮品,并称之为三叶虫茶。三叶虫茶在中国民间已流传数百年之久,由于它的多种药用价值和独特的舒适口感,传统生产地区的人们一直沿用至今。三叶虫茶的化学成分较