环境与食品安全.ppt

文档介绍：环境与食品安全石英shiy228@**********.2DDT in fish-eating birds (ospreys) 25 ppm↑DDT in large fish (pike) 2 ppm↑DDT in small fish (minnows) ppm↑DDT in zooplankton ppm↑DDT in water 3×10- 1874Dichloro-Diphenyl-Trichloroetjane ?对害虫毒性很高;?对温血动物和植物相对无害;?无刺激性,气味很小;?能广泛施用:?化学性质稳定且残效期长;?价廉且容易大量生产。.5The Nobel Prize in Physiology or Medicine 1948 for his discovery of the high efficiency of DDT as a contact poison against severalarthropodsPaul Hermann Müller “一个美丽而充满生机的美国中部小城,以其鸟类丰富多彩而驰名,当候鸟蜂拥而至的季节,人们会长途跋涉来这里观光。一天随着一批携有杀虫剂居民的到来,很快发生许多不祥变化。神秘的疾病袭击成群小鸡;牛羊也病倒和死亡;孩子在玩耍时突然倒下,几小时后已经死去……人从梦中醒来,再也听不到鸟儿歌唱,原野、森林和沼泽都是一片沉寂,一切声音都没有了,只有可怕的寂静……”.101962现代环境保护主义的基石