exposed to other liver-damaging hydrocarbons, which are so widely used as solvents, paint removers, degreasing agents, dry-cleaning fluids, and anesthetics. What then can be a ‘safe dose’ of DDT?
The situation is made even more complicated by the fact that one chemical may act on another to alter its effect. Cancer may sometimes require the complementary action of two chemicals, one of which sensitizes the cell or tissue so that it may later
skechers boots, under the action of another or promoting agent, develop true malignancy. Thus
jordan heels for woman, the herbicides IPC and CIPC may act as initiators in the production of skin tumors, sowing the seeds of malignancy that may be brought into actual being by something else—perhaps a common detergent.
There may be interaction, too, between a physical and a chemical agent. Leukemia may occur as a two-step process, the malignant change being initiated by X-radiation, the promoting action being supplied by a chemical, as, for example, urethane. The growing exposure of the population to radiation from various sources
christian louboutin boots, plus the many contacts with a host of chemicals suggest a grave new problem for the modern world.
The pollution of water supplies with radioactive materials poses another problem. Such materials, present as contaminants in water that also contain
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