DDT and dieldrin residues on pasture following dusting and spraying

DDT house spraying and re-emerging malaria.

This article discusses the role of DDT in the re-emerging cases of malaria worldwide. It is noted that malaria is reappearing in urban areas and in countries that previously eradicated the disease, including the Amazon Basin, South and North Korea, Armenia, Azerbaijan, and Tajikistan. In addition, the frequency of imported malaria has also increased in industrial countries. Although many fact...

on semihypergroups and hypergroups

in this thesis, first the notion of weak mutual associativity (w.m.a.) and the necessary and sufficient condition for a $(l,gamma)$-associated hypersemigroup $(h, ast)$ derived from some family of $lesssim$-preordered semigroups to be a hypergroup, are given. second, by proving the fact that the concrete categories, semihypergroups and hypergroups have not free objects we will introduce t...

Effect of DDT, dieldrin, and heptachlor on the growth of selected bacteria.

Review on DDT and its residues in Turkey's wetlands.

Turkey is a country rich in wetlands (250 wetlands, approximately one million hectares). As it is in many countries, the wetlands in Turkey are threatened by the agricultural activities, loss of habitats due to these activities and by pesticide contamination. After 1940, large quantities of pesticides, especially DDT were used intensively against mosquitoes and pests in most of the wetlands in ...

Organochlorine Residues in Pasture and Livestock

The occurrence and persistence of OC residues in both animal fat and in soil is reviewed. These chemicals have caused problems in production of pasture and grain for livestock. Management strategies to give short term guidelines to graziers are described. Attempts to increase the rate of breakdown in the soil under Australian conditions by varying frequency of cultivation, by addition of lime o...