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已读[646] 发布: 2013/09/09 08:28:20
Azom.com The compound may be red or yellow based on the particle size. Copper(I) oxide is found ... The copper sulfate in Benedict's solution reacts with electrons from the ketone or the aldehyde group to form a red-brown precipitate copper oxide. The solution ...
已读[1408] 发布: 2013/08/27 05:27:54
VICE N-methyl-1-phenylpropan- 2 - amine or methamphetamine was first synthesized from the naturally occurring alkaloid ephedrine by Japanese chemist Nagai Nagayoshi in 1893 while researching the structure of ephedrine [1]. Meth's psychostimulant effect does ... and more »
已读[700] 发布: 2013/07/28 23:22:52
Targeted News Service (subscription) ALEXANDRIA, Va., July 25 -- Nektar Therapeutics, San Francisco, has been assigned a patent (8,492,503) developed by four co-inventors for "polymeric alpha-hydroxy aldehyde and ketone reagents and conjugation method. ... states: "Provided herein are ... and more »
已读[741] 发布: 2013/07/28 23:22:48
postzambia.com Updating Parliament on the findings of the investigations on Zambeef imported meat products, Dr Kasonde said that as indicated in his previous statement, formaldehyde was in a group of aldehydes and was a compound used in embalming corpses for ... and more »
已读[934] 发布: 2013/06/23 13:38:05
昨日,西安市85中高中化学老师陈铎说,生活垃圾里包含大量的蔬菜、肉、蛋、粮食等,这些有机物在一起,相互交错,发生化学反应,主要会产生五类气体,一、含硫化合物,...五、含氧衍生物,有醛类、酚类、酮类、醇类,...“比如,肉和鸡蛋里含丰富蛋白质,蛋白质变质发酵后,...
已读[996] 发布: 2013/06/20 13:38:37
华东理工大学徐仁博的“苯肼和二醛构建氮桥环新烟碱类化合物的合成及活性研究”, - 中国农业大学杨冬燕的“硝基缩氨基胍类化合物研究进展”; 筛选及应用技术组交流的报告有: - 上海市农药研究所陶黎的“海洋放线菌Y12-26代谢产物中农用活性成分的研究”, - ...
已读[5294] 发布: 2013/06/18 13:28:13
31.含农药增效助剂的莠去津除草剂组合物 申请号:CN200810043853 申请日:2008.10.21 公开(公告)号:CN101371662B 公开(公告)日:2012.05.30 申请(专利权)人:上海工程技术大学 ...
已读[699] 发布: 2013/06/10 04:09:20
separationsNOW.com The detection limits for formaldehyde, acetaldehyde, acetone, methacrolein, methyl vinyl ketone, hydroxyacetone, glycoaldehyde, glyoxal and methylglyoxal were in the range 0.08-1.10 ppb by volume. The calibration curves were linear over 1-500 ppb by ...
已读[825] 发布: 2013/05/20 17:27:26
Azom.com An aldol reaction involves the condensation of two carbonyl compounds to form a ß-hydroxyaldehyde or ß-hydroxyketone, the aldol product. The typical aldol reaction involves self condensation of the reactant ketone or aldehyde wherein one molecule adds ...

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