Web作 者 ：罗艺萍;赵兴堂;赵静峰;羊晓东;李良; 期 刊 ：中国药房 2010年 15期 页码：1396-1398 关键词：兔儿风属；细穗兔儿风；化学成分； 摘 要 ：目的:研究细穗兔儿风的化学成分。方法:采用硅胶柱色谱及重结晶的方法对细穗兔儿风干燥全草的乙醇提取物进行分离纯化,通过理化常数测定以及波谱分析 ... Webchlorinated biphenyls are soluble in many organic solvents and in water only in the ppm rang .although chemically stable (including to oxygen of the air）they can be hydrolyzed to oxybiphenyls under extreme conditions forming toxic polychlorodibenzofurans氯化联苯易溶于多种有机溶剂，微溶于水。
Studies in the Biphenyl Series. VI. Orientation in Bromination …
WebCAS号查询致力于为化学行业用户免费提供oxybiphenyl的CAS号、中文名称、英文名称相互转换服务,同时也包括oxybiphenyl的性质、化学式、分子结构、密度、熔点、沸点等信息。 WebEUROLAB, cùng với các phòng thí nghiệm hiện đại được công nhận và đội ngũ chuyên gia, cung cấp các dịch vụ thử nghiệm chính xác và nhanh chóng trong phạm vi thử nghiệm ISO 3856-2. Các phương pháp nằm trong khoảng từ 0,05% (m/m) đến 5% (m/m). crock pot pork chop recipes easy with rice
Reading Material Type and Sources of Air Pollutants翻译 - 百度文库
WebDE3834737A1 DE3834737A DE3834737A DE3834737A1 DE 3834737 A1 DE3834737 A1 DE 3834737A1 DE 3834737 A DE3834737 A DE 3834737A DE 3834737 A DE3834737 A DE 3834737A DE 3834737 A1 DE3834737 A1 DE 3834737A1 Authority DE Germany Prior art keywords weight carrier alkyl acid carrier mixture Prior art date 1988-10-12 Legal status … WebJ. Org. Chem. 1990,55, 639-647 Photochemistry of Diaryliodonium Salts 639 John L. Dektar and Nigel P. Hacker* IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120-6099 Received December 8, 1988 The photochemistry of diphenyl- and bis(4-methylpheny1)iodonium salts was investigated by product analysis, ... WebBiphenyl is a highly toxic compound with a pungent smell. It is a solid at ambient temperature with a relatively high sublimation pressure. Therefore, air treatment is required to reduce the biphenyl concentration in the air to safe and tolerable values in processing … crock pot pork chile verde