摘要:

Low level discharges of total residual bromine chlorine (0.020–0.081 mg/1) and chlorine (0.014–0.062 mg/1) which were effective for biofouling control in a once‐through steam electric generating station were not lethal to juvenile Atlantic menhaden and spot exposed continuously to the halogenated water for 19 and 20 days, respectively. Although no difference in toxicity between the two halogens was found in the study, preliminary evidence by other investigators at higher concentrations suggest that bromine chloride may be less toxic than chlorine.

ISSN:0360-1226    

DOI:10.1080/10934527709374763

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0360-1226    

DOI:10.1080/10934527709374764

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

This paper describes a model for future energy supply to provinces and states at present self‐sufficient in meeting local energy needs through the utilisation of water power. It involves an integrated hydro and solar power system.

ISSN:0360-1226    

DOI:10.1080/10934527709374765

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Populations of the cotton leafperforator,Bucculatrix thurberiellaBusck, increased throughout the growing season on ‘Pima S‐5’ (Gossypium barbadenseL.) and ‘Deltapine 16’ (G.hirsutumL.) cottons grown under 7‐, 14‐, and 21‐day irrigation schedules.

ISSN:0360-1226    

DOI:10.1080/10934527709374766

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0360-1226    

DOI:10.1080/10934527709374767

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

The continuous use of gossyplure‐baited traps in 1974–1975 for monitoring infestations of the pink bollworn moth in cotton fields succeeded in reducing the percentage of infested bolls to less than 5% in the Hagilboa and Beth‐She an regions of Israel. The average number of insecticidal treatments necessary to control the pest was likewise reduced from 5.8 in 1974 to 1.64 in 1975 in Beth‐She’ an and from 2.9 to 2.21 in Hagilboa. The monitoring threshold of 8 males captured per trap per night to determine the need for pesticide treatment, instituted in 1975, proved, as expected, to be a less accurate yardstick than the threshold of 5 males per trap per night previously recommended. Crude or distilled cottonseed oil was more efficient for use in the trap cups than the aqueous detergent solution used heretofore, and the traps themselves were considerably improved by providing a plastic rooflet above the cups.

ISSN:0360-1226    

DOI:10.1080/10934527709374768

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Adsorption of Cr(VI) and Cr(III) species by kaolinite and montmorillonite clay minerals was found to be highly dependent upon the pH of the clay suspensions and the physical‐chemical properties of the clay minerals. Adsorption of Cr(VI) decreased as pH increased and the HCrO4‐ion was the Cr(VI) species predominantly adsorbed. More Cr(VI) was adsorbed from leachate solutions than from pure K2CrO4solutions. The adsorption of Cr(III) increased as the pH of the suspensions increased. About 30 to 300 times more Cr(III) than Cr(VI) was adsorbed by both clays and the amounts of Cr(III) adsorbed corresponded to cation exchange‐adsorption of hydrolyzed Cr(III) species. The adsorption of Cr(III) is 3% to 14% lower in leachate than in pure Cr(NO3)3solutions.

ISSN:0360-1226    

DOI:10.1080/10934527709374769

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

摘要:

Special Issue ofPROGRESS IN WATER TECHNOLOGY.8(2/3), 1976. ii + 450 pgs A journal of the International Association on Water Pollution Research. Edited by S. H. Jenkins. Published by Pergamon Press Ltd., Oxford and New York. $60.

ISSN:0360-1226    

DOI:10.1080/10934527709374770

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor

ISSN:0360-1226    

DOI:10.1080/10934527709374762

出版商:Taylor & Francis Group    

年代:1977

数据来源: Taylor