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已读[163] 发布: 2013/06/03 04:01:11
不漏油,使用更安全,寿命更长久上下立体式加热,受热均匀,炒菜速度快100%无油烟厨房油烟的主要成分是醛、酮、烃、脂肪酸、醇、芳香族化合物、内酯、杂环化合物等。...
已读[169] 发布: 2013/06/03 04:00:56
焦糖本身无毒,但加铵盐作催化剂生产的焦糖含有一种含氮的杂环化合物质,这种物质对人的身体是有害的。 4、胡萝卜素:它是食品中正常成分,是人们所需要的营养素...
已读[322] 发布: 2013/06/03 03:46:03
MIT News The new approach uses a family of chemicals called carbenes to attach other substances to gold — and potentially to other material surfaces as well. The work, led by assistant professor of chemistry Jeremiah Johnson, has been published in the Journal ... and more »
已读[184] 发布: 2013/06/03 03:27:36
他们又研究了各种环境条件对微生物活性和脱硫速率的影响,以及分散剂、助溶剂、破乳剂对微生物的毒性,从而优化反应条件,提高了脱硫速率。并在生物反应器内实现了对微...
已读[378] 发布: 2013/06/03 01:17:55
8. 一种含醚菊酯组合物的可乳化粒剂及制备方法 一种含醚菊酯组合物的可乳化粒剂及制备方法,涉及农用杀虫剂及其制备方法。由以下重量百分比的原料组成:有效成分1...
已读[191] 发布: 2013/06/02 05:13:45
Pakistan Daily Times The Threat: Heterocyclic amines, or HCAs, are carcinogenic compounds created when meat is heated up. This barbecue bummer has been shown to increase the risk of breast, lung, stomach, pancreatic and prostate cancers. The Fix: Master the marinade.
已读[154] 发布: 2013/06/02 05:13:37
Gainesville Sun His expertise in heterocyclic compounds — which form the basis of many anti-cancer and anti-viral pharmaceuticals, as well as antibiotics and vitamins — has led Katritzky over the years to publish more than 2,000 articles. He has also edited about ...
已读[228] 发布: 2013/06/01 01:41:24
分子式:物理化学特征:吡啶是含有一个氮杂原子的六元杂环化合物,即苯分子中的一个“碳氢(CH)”被“氮(N)”所取代而生成的化合物。吡啶通常呈无色或微黄色...
已读[152] 发布: 2013/06/01 01:41:04
Laboratory Equipment These carbenes could function as “surface anchors” to link many compounds to many different surface materials — a process known to chemists as “functionalizing” the surface. Johnson says, “I can count on one hand the number of methods you can use to ... and more »
已读[167] 发布: 2013/06/01 01:41:02
University of Florida He is UF's Kenan Professor of Chemistry and director of the university's Florida Center for Heterocyclic Compounds , which focuses on scientific research, publishing and teaching. He also leads the Katritzky Research Group, which includes graduate ...
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