The prevention of thallium death by sodium selenate

Protective effect of thallium against the formation of selenium cataract in rats

A simultaneous administration of thallium and cataractogenic dose of selenite to young rats protects the animals against the development of selenium cataract but does not prevent the transient epilation caused by thallium.

Antagonistic and synergistic effects of lead and selenium in Rattus norvegicus

Female rats were administered intraperitoneal injections of solutions of lead acetate and sodium selenite. The salt solutions were given singly to 'control' animals and successively to the 'treated' animals in both chronic and acute treatments but with or without a time gap of 1 h in the latter treatment. In the chronic treatments the dosage of lead acetate was kept constant and that of sodium selenite varied while in the acute treatments the ratio of the two salts was kept constant. Degrees of protection afforded by sodium selenite against chromosomal damage caused by lead acetate were assessed.

[Interactions of toxic trace elements with special regard to selenium]

The significance of the trace elements in nutrition is often decisively affected by the interaction of trace elements with other trace elements and of trace elements with other substances. These processes, which include synergistic and antagonistic effects, are of great importance not only to the essentiality, but also to the toxicity of trace elements. There is considerable experience with interactions of essential elements. There is considerable experience with interactions of essential elements or of elements in essential concentrations. On contrast, there is a scarcity of information pertaining to toxic effects that are influenced by synergisms and antagonisms. This situation is illustrated by some examples and especially by the role of selenium. It is shown that these problems deserve closer attention.