methods assume that the nature of the toxic cpmpounds present is known, and that they can
be extracted in known yields. Neither assumption is easily validated except by using …

By the use of labelled toxicants the interaction has been studied between fungus spores and
sulphur, mercury, silver, cerium, ferric dimethyldithiocarbamate, 2-heptadecyl-2-imidazoline …

The author briefly outlines the principles of radioactivity, describes the four types of radiation
(α-particles, β-particles, γ-rays and X-rays) most frequently encountered in biological and …

The technique applied in these studies with schradan and systox showed promise-not only
for fundamental research on the biochemical behaviour of these materials-but also for …

Abstract i. Radioisotopes have been found valuable tools for several types of research and
they find several uses in entomological investigations. In choosing the particular isotope, the …

Techniques employing radioisotopes were developed for the investigation of methods for
the control of plant crop pests. Radioactive carbon; phosphorus, sulfur, zinc, and cobalt were …

[en] The use of radioisotopes in entomological studies is briefly reviewed in the following
sections: pathways of radioisotope uptake and elimination, radioisotopes tagging of …

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[en] Methylcarbamates constitute one of the major groups of insecticides. Many unresolved
problems in their toxicology may be readily approached with radiotracer studies …

[en] In early uses of radioactive tracers in ecological investigations of pests insect,
dispersion and migration phenomena were studied with radioisotopes as markers for …