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On the basis of an analysis of literature and of own investigations, the state of metalions in natural waters is described as essential for the properties. There are investigated especially: hydrolysis, polymerization and complexation with humic substances. An analytical method for determining...
An investigation is made on the COD/OC ratio for samples from two ponds, one brook, three rivers and four reservoirs, all samples having been taken from sampling stations with a low organic load, with 2.6… 127 mg/l COD and 0.9… 38 mg/l OC. The samples were filtrated by filtration with pore sizes...
Chemical substances can be transformed under the influence of physical/chemical and/or biochemical active factors. By this, the ecotoxicological and hygienic‐toxicological properties and effects of the substances are changed also with respect to toxicity, late effects (carcinogenetic, mutagenic,...
Heteropneustes (Saccobranchus) fossilis (Pisces; Clariidae) is exposed to the biocides Chlordane, Aldrin, Metasystox, Dichlorvos, Carbofuran and Sevin for 30 d at a concentration of the 1/15 fraction of LC50;96h with daily exchange of the medium. At intervals of 5 d the respiration rate was...
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