Patches of fabrics exposed to pesticide spray formulations lost substantial quantities of the chemicals within four to six hours. Fabrics were cotton or 1:1 cotton-polyester blends, knitted or woven, unfinished or finished. Pesticides used were parathion, malathion, and dicofol. Parathion loss following exposure to spray formulations was dependent on fabric type, finish and their interaction, while a less extensive loss of dicofol depended on none of these. Deposition and retention of pesticide-bearing particulates appeared to depend on mechanical restrictions related to fabric weave and on the electrokinetic potential of fabric surfaces.
The livers and kidneys from adult beagle dogs chronically exposed to 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) and from their F1 weanling progeny were analyzed for vitamin A content. The dogs, subjects of a multigeneration study of the effects of DDT on canine reproduction, were fed diets which were optimum for growth and reproduction. The DDT feeding levels were 0, 1, 5, and 10 mg technical DDT/kg body weight per day. The effect of DDT in reducing vitamin A levels in liver and kidney that has been demonstrated in other species was not manifest in adult or weanling dogs in this study.Interference by p,p′-DDT, 1,1-dichloro-2,2-bis(p-chlorophenyl)ethane (p,p′-DDD), 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (p,p′-DDE), and 1-chloro-2,2-bis(p-chlorophenyl-ethylene (p,p′-DDMU) in the analysis for vitamin A in liver and kidney tissue was investigated and found to be of no practical importance in the present study.
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