title: [Study model of the mid-range ecotoxicity of chemical substances].
abstract: Semi-chronic ecotoxic effects are measured by studying mortality and reproduction of daphnids, grown in toxic medium and fed with toxic chlorellae during 4 weeks. Toxic biosorption is controlled analytically. Toxicity of Cd++ at a concentration of an order of magnitude of by liter is revealed after 14 days. Cr6+ appears non toxic at concentrations under 25 micrograms/l.
mesh_terms: D000818:Animals; D002104:Cadmium / Q000633:toxicity*; D002708:Chlorella; D002857:Chromium / Q000633:toxicity*; D003621:Daphnia / Q000187:drug effects*; D014873:Water Pollutants / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D002104:Cadmium; D002857:Chromium
vernacular_title: Modèle d'étude de l'écotoxicité à moyen terme des substances chimiques.