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1st: brief introduction of biomagnification. Which happens with stable, fat soluble chemicals that can't be excreted. In late 1960s, scientists began using Kow to research aquatic food webs, low KOW was taken as more safe.
2nd: environmental chemists realized the kow theory may not apply on mammals and birds because of their lung. Anther new point :" KOA"
3rd: to explore above hypothesis, they tested not only POPs but also other low KOW high koa ingredients. The result testifies the correction of model. |
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