Polycelis nigra
National Institutes of Health
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SummaryThere are more lake-dwelling species of triclad in northerm Britain (10) than in southern Sweden (7) and the distribution…
The estimation of the number of variables operating in cases of toxic action toward living organisms is discussed. The toxicity…
The suggestion has been put forward that the oligodynamic action of certain heavy metals is the result of the destruction or…
1. The degree of toxicity of the hydrogen ion and the ions of eighteen metals to Polycelis nigra (Muller) has been assessed by…
1. A brief review is given of previous work on the toxic effect of aqueous solutions of metallic salts on living protoplasm and…