Szukana fraza: [Abstract = "Experiments were done on two freshwater species, Daphnia magna Straus and Dugesia tigrina Girard. The toxic effects on 3 toxic compounds, lead nitrate, lead chloride \(mineral substances\) and lead acetale \(organic compound\) were used in the studies of acute intoxication. The sensitivity of two methods, test with cut planarians and test with Daphnia magna were compared."]

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