The results of a 'BioWise' demonstration project to assess the comparative sensitivity and practicality of seven new assays for the direct assessment of ecotoxicity in industrial effluents are presented. In addition the aim of the project was to validate the results of the new assays against benchmark data generated from non-proprietary, rapid, microplate screening assays using the regulatory species; freshwater crustacean Daphnia magna and green algae Selenastrum capricornutum, chosen in view of their environmental relevance. The new commercial test assays were: Daphnia magna, Selenastrum capricornutum and Thamnocephalus platyurus Toxkits supplied by Vickers Laboratories Ltd, containing dormant, immobilised life stages of the test species; GreenScreen EM, a yeast based assay for genotoxicity and general acute toxicity supplied by Gentronix Ltd; and CellSense a mediated, amperometric whole cell biosensor based on immobilised activated sludge and E. coli. 38 effluent samples supplied by members of SOCSA (Specialised Organic Chemicals Sector Association) were examined over a period of 13 months, in the project co-ordinated by the AstraZeneca Brixham Environmental Laboratory, and part funded by BioWise via the UK Government Department of Trade and Industry.
IN a previous paper (T., 1921, 119, 1126), the authors showed that the sorption of alcohol by animal charcoal, when it is exposed to the saturated vapour, is about five times as great as the sorption of water for a given specimen of animal charcoal. Further, it was shown that in the case of mixtures of alcohol and water the alcohol is preferentially sorbed. fessor Francis Francis and Professor J. w. McBain. * Carried out at Bristol University through the kind permission of Pro-VOL. CXXI.
DRIVER AND BIRTH: THE SORPTION OF CXXII1.-The Sorption of Alcohol and ?Voter by Animul Charcoal. THE CEEMIC-4L DEPARTMENT, UNIVERSITY COLLEGE, NOTTINUHAM.
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