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已读[501] 发布: 2013/09/10 07:37:17
News-Medical.net Gurak is working with Foss to adapt riboflavin, also known as vitamin B2, for use as a metal-free catalyst in oxidative reactions that create heterocyclic compounds , or heterocycles. Heterocycles have wide-ranging uses and are important to the future ...
已读[1244] 发布: 2013/09/10 07:37:10
Huffington Post There are reasons not to char your food that go far beyond the culinary: two compounds found in charred and overcooked meats, heterocyclic amine and polycyclic aromatic hydrocarbons, are known carcinogens. What's more, research shows that those  ... and more »
已读[491] 发布: 2013/09/10 07:37:03
Cleveland Jewish News (blog) From benzene obtained from petroleum, Meyer in 1883 isolated thiophene, a heterocyclic compound containing sulfur, which much later was to become an important component of various synthetic drugs. He passed away in 1897. 1850(2nd of Tishrei, 5611):  ... and more »
已读[740] 发布: 2013/09/09 08:19:12
Bloomberg BNA The Environmental Protection Agency on Aug. 21 released a draft toxicological review of benzo[a]pyrene that found the combustion byproduct and coal tar c...
已读[1058] 发布: 2013/08/27 07:11:51
(百草枯、敌草快、毒莠定)和杀虫剂(毒死蜱、甲基毒死蜱、菊酯);在染料方面,可制备蓝色基BB、蓝色基RR、分散蓝S-RB、可溶性还原灰IBL、可溶性还原蓝IBC等;在...
已读[899] 发布: 2013/08/27 07:11:46
吡啶其他下游农药毒死蜱、氟草烟、敌草快均为目前全球主流的农药品种,替代风险小,未来需求稳中有升。目前我国吡啶需求约为6 万吨,预计在下游拉动下,到2015年将...
已读[812] 发布: 2013/08/27 07:11:42
虽然中国出台政策禁止百草枯水剂的使用,考虑国内百草枯80%出口以及替代制剂产业化,禁用对需求影响校吡啶其他下游农药毒死蜱、氟草烟、敌草快均为目前全球主流的农药...
已读[786] 发布: 2013/07/30 14:57:22
煤焦油是煤化学工业之主要原料,其成份达上万种,主要含有苯、甲苯、二甲苯、萘、蒽等芳烃,以及芳香族含氧化合物(如苯酚等酚类化合物),含氮、含硫的杂环化合物等...
已读[1389] 发布: 2013/07/30 14:57:07
环状化合物,可根据成环的原子种类分成碳环化合物和杂环化合物。碳环化合物完全由碳原子组成的碳环,此类化合物中含有苯环的化合物称为芳香族化合物(见第五章芳香...
已读[1016] 发布: 2013/07/30 14:57:03
在作业过程中会排出大量含有机物的油烟,其主要成分为醛、酮、烃、脂肪酸、醇、酯、内酯、杂环化合物、芳香族化合物,其成分复杂,因此对大气造成了极大的污染,对...
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