Uses of Alkyl Halides ■杀虫剂、杀灭蚊子（疟疾） DDT1939年后广泛使用（残留高） Srilanka ●1934-1935150万(8万died) ●1963：仅15例 ●1968-1969第二季度60万例 1972:环境保护组织（EPA) 废除 ■冷却液和喷气燃料推进剂
Uses of Alkyl Halides ◼杀虫剂、杀灭蚊子（疟疾） DDT 1939年后广泛使用（残留高） Srilanka : ⚫1934-1935 150万（8万 died） ⚫1963:仅15例 ⚫1968-1969第二季度60万例 1972：环境保护组织（EPA）废除 ◼冷却液和喷气燃料推进剂
Halogenated Steroids as Anti-Inflammatory and Anti-Asthmatic Agents OH OH OH HO HO Cortisol Budenoside CCH2CH3 SCH2F H30 CCH,CH H.C CCH2CH3 HO HO 0 CH3 Beclomethasone dipropionate Fluticasone propionate An international study published in early 2004 found that fluticasone was effective in reducing asthma-inducing inflammation in babies from one to three years of age,while having no significant effect on their growth
An international study published in early 2004 found that fluticasone was effective in reducing asthma-inducing inflammation in babies from one to three years of age, while having no significant effect on their growth
Plant pathologist Frank Westerlund demonstrates the "bromomethane difference"between strawberries grown in a fumigated plot (right)and those not (left).The latter are withered by verticillium wilt,a fungus. The Dilemma of Bromomethane: Highly Useful but Also Highly Toxic
The Dilemma of Bromomethane: Highly Useful but Also Highly Toxic
Naturally Occurring Organohalides Marine corals secrete organohalogen compounds that act as a feeding deterrent to fish. More than 5000 organohalides have been found to occur naturally,and tens of thousands more surely exist
More than 5000 organohalides have been found to occur naturally, and tens of thousands more surely exist. Naturally Occurring Organohalides
Br Br H Halomon The pentahalogenated alkene halomon has been isolated from the red alga Portieria hornemannii and found to have anticancer activity against several human tumor cell lines. Some naturally occurring organohalides are produced in massive quantities. Forest fires,volcanoes,and marine kelp release up to 5 million tons of CH3CI per year,for example,while annual industrial emissions total about 26,000 tons. Termites are thought to releaseas much as 108 kg of chloroform per year
The pentahalogenated alkene halomon has been isolated from the red alga Portieria hornemannii and found to have anticancer activity against several human tumor cell lines. Some naturally occurring organohalides are produced in massive quantities. Forest fires, volcanoes, and marine kelp release up to 5 million tons of CH3Cl per year, for example,while annual industrial emissions total about 26,000 tons. Termites are thought to releaseas much as 108 kg of chloroform per year