Entwicklung umweltfreundlicher Strukturierungsverfahren in der Fertigung elektronischer Baugruppen Abschlussbericht

Available from TIB Hannover: F03B44 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDeutsche Bundesstiftung Umwelt, Osnabrueck (Germany)DEGerman

Entwicklung umweltfreundlicher Strukturierungsverfahren in der Fertigung elektronischer Baugruppen (USTRUB) Abschlussbericht

Available from TIB Hannover: F02B547 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDeutsche Bundesstiftung Umwelt, Osnabrueck (Germany)DEGerman

Quantifizierung von Verhaltensparametern unter Schadstoffeinwirkung bei Fischen

In the prolonged fish toxicity test (14-28 d) there is an important test criterion for the determination of the LOEC (lowest observed effect concentration) and the NOEC (no observed effect concentration) which is called 'changes in swimming behaviour'. But it is almost impossible to recognize small changes in swimming behaviour in the vicinity of effect threshold concentrations without technical devices, because only conspicuous behaviour changes can be safely observed. For this reason the test design has been combined with quantitative behaviour measurements. The video processing behaviour monitoring apparatus BehavioQuant observed 12 test aquariae, each containing 10 zebrafish. Five concentrations of a compound are tested in comparison with controls, each in 2 parallel sets. The BehavioQuant system calculates up to seven behavioural test parameters from the tracks of each fish and evaluates these data statistically. Four compounds belonging to different structural groups were investigated, using dilutions down to environmentally relevant concentrations. The lowest concentrations with an observed effect on the behaviour are 8 #mu#g/l 3,4-dichloroaniline, 0,5 #mu#g/l bis-tributyltinoxide (TBTO), and 5 #mu#g/l simazine. No effect could be observed with phosphate in concentrations between 10 #mu#g/l and 100 mg/l. In simazine the factor between the LOEC and the LC 50 is about 2000. Thus the quantitative behaviour measurements with BehavioQuant makes the prolonged fish toxicity test (14-28 d) much more sensitive. (orig.)SIGLEAvailable from TIB Hannover: RN 8908(94-103) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Bonn (Germany)DEGerman