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Radiolabeled tri-, tetra-, and pentachlorobiphenyls (PCB) and DDE were studied in a laboratory model ecosystem for degradation pathways, and biomagnification in alga, snail, mosquito, and fish. Trichlorobiphenyl was degraded in all the organisms of the model ecosystem much more rapidly than tetrachloro- and pentachlorobiphenyl. Pentachlorobiphenyl was(More)
In debates on the regulation of cigarette advertising, opposition to regulation is based on a perceived threat to individual autonomy and choice. Advocates of regulation have sought to combat such arguments by focusing on the unique characteristics of tobacco: the absence of a "safe" level of consumption; that the habit is often acquired by children or(More)
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