摘要:

The increasing importance of public policymaking with respect to energy and the environment is evident. Thus the processes of policy development and its relationship to environmental research have become more important to the research community. Since it appears that future policy will become more dependent on research results and hence strengthening this relationship, it seems appropriate to focus attention on research methodologies that provide preliminary results with respect to alternative policies. These results may precede expensive computer simulations which are often developed to aid in the understanding of environmental problems. In particular, it would seem that signed digraphs offer an approach which is simple in concept, qualitative in nature and yet provides a representation for problems in a framework which makes it easy to envision an array of potential alternative environmental policy directions which can then be investigated further by more sophisticated methods.

ISSN:0360-1226    

DOI:10.1080/10934527609385784

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

ISSN:0360-1226    

DOI:10.1080/10934527609385785

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The toxin isolated from the Florida red tide organismGymnodinium breveDavis has been assayed for ichthyotoxicity and hemolytic activity. In addition the effect of selected enzymes on both activities has been determined. With one possible exception, no enzyme reduced the ichthyotoxicity of the toxin. Several enzymes reduced the hemolytic activity of the toxin. The action of enzymes as inhibitors of hemolytic activity of this toxin is described, and the implications of the results are presented.

ISSN:0360-1226    

DOI:10.1080/10934527609385786

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The removal, concentration, and recovery of zinc cyanide and cyanide ion from industrial electroplating wastes can be readily achieved with the weakly basic anion exchange resin, Amberlite XE‐275. Dilute sodium hydroxide easily strips both the metal cyanide and cyanide in a regeneration cycle. This new nondestructive process is promising for the recovery and recycle of water and costly chemicals now wasted and for the elimination of sludge disposal problems associated with current destructive pollution abatement methods.

ISSN:0360-1226    

DOI:10.1080/10934527609385787

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

When oriental fruit flies,Dacus dorsalisHendel, of mixed sex were supplied with sugar treated with 0.026% thiotepa for 3 days after eclosion no eggs hatched. Only 0.2% hatched when the dose was 0.0065% thiotepa. A dose of 0.10% was toxic to the insects. Mediterranean fruit flies,Ceratitis capitata(Wiedemann), were not completely sterilized at any dose tested although eggs hatched when flies of mixed sex were supplied with 0.051% thiotepa, and only 0.4, 0.7, 0.7, and 0.8% hatched when the dose was 0.051, 0.026, 0.013 or 0.0065%, respectively. A dose of 0.82% was toxic. Mortality of both species was lower among treated flies that were fed normally after treatment, especially among those treated at or near the threshold dosages, than among untreated flies. Also, when both species were deprived of food and water, treated flies survived longer than untreated flies. Treated oriental fruit fly males were 84% as competitive in mating with females as their untreated counterparts; treated male Mediterranean fruit flies were 79% as competitive.

ISSN:0360-1226    

DOI:10.1080/10934527609385788

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Whole water samples are injected directly into a gas Chromatograph equipped with a packed Tenax‐GC column. Polar compounds are separated with good resolution under the temperature programming conditions employed. The by‐product water from oil shale retorting contains carboxylic acids in the homologous series ranging from acetic to decanoic acid. Various amides, cresols and phenol are present in trace amounts. Coal conversion by‐product waters also contain carboxylic acids, but in trace amounts (except acetic). Major components among the dissolved organics in coal conversion samples are phenol, o‐cresol, m‐cresol and p‐cresol. Present at lower levels are several other alkyl substituted phenols and napthols.

ISSN:0360-1226    

DOI:10.1080/10934527609385789

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The suitability of certain species of protozoa as indicators of water quality has been determined. Experiments were conducted under laboratory conditions to standardize a bioassay procedure for water quality using eitherParamecium caudatum.Amoeba protpus,orEuglena gracilisas the indicator organism. The bioassay, which consists of exposing the organisms to a known concentration of pollutant under laboratory conditions, followed by microscopic observation to establish the time of death, affords a reliable, convenient and inexpensive way to monitor for water quality.

ISSN:0360-1226    

DOI:10.1080/10934527609385790

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor