摘要:

AbstractAfter the description of the present state of knowledge and the theoretical fundaments as well as the results of laboratory and field experiments given in preceding communications, this part presents the results from the application in a rising pipe of a well in an open‐cast lignite mine. There is represented the technical design of the electrochemical polarization system, inclusive of the power supply, for anodic polarization. At current densities of the order of μA/cm2the pipe does not show any noticeable ferric incrustation after five months, whereas previously after half that period the pipe was half that period the pipe was half‐clo

ISSN:0323-4320    

DOI:10.1002/aheh.19910190112

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractThe toxic action of bicomponent mixtures of phenols and heavy metals on luminous bacteria has been studied. It was established that phenolic compounds displaying properties of structural‐specific agents whose influence is based on chemical reactions with receptors in mixtures with heavy metals of mercury, cadmium in low concentrations caused additive, and with the increase of metal concentration‐more than additive, effects.Phenolic compounds acting as structurally‐nonspecific agents (resorcinol), whose toxicity is stipulated by their physico‐chemical properties, produce a less than additive effect in a mixture with heavy

ISSN:0323-4320    

DOI:10.1002/aheh.19910190113

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractActivities of the acid and alkaline phosphatase changes in gills of mudskipperB. dentatushave been analysed during treatment with different concentrations of mercuric chloride for different durations. The study shows a more or less linear inhibition of the activity of acid and alkaline phosphatases with increasing mercuric chloride concentrations as well as duration of treatment.

ISSN:0323-4320    

DOI:10.1002/aheh.19910190114

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

摘要:

AbstractFreshwater fish were exposed to sublethal concentration of commercial grade malathion (50 E. C.) (2 ppm) for 7,15 and 30 days. After each exposure period, certain biochemical parameters were studied. A decrease in total, structural and soluble proteins and an increase in free amino acid and protease activity levels in contrast to protein decrement were observed in 7 and 15 days of exposure, but on 30 days of exposure all the values got nearer to normalcy. The restoration of different protein fractions to normalcy implies that after 15 days of exposure there seems to exist an oscillatory phase in protein turnover towards a more synthetic phase leading to the establishment of recovery and adaptation phenomena.

ISSN:0323-4320    

DOI:10.1002/aheh.19910190115

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY

ISSN:0323-4320    

DOI:10.1002/aheh.19910190101

出版商:WILEY‐VCH Verlag GmbH    

年代:1991

数据来源: WILEY