摘要:

Huckel molecular orbital calculations and application of Seybold‐Smith reactivity theory suggests an explanation for the different carcinogenic potencies observed among selected aza‐polycyclic aromatic hydrocarbons in terms of the tendencies of these compounds to undergo specific metabolic activating reactions. Theoretical reactivity indices representing these reactions correlate with the carcinogenic activities of these environmental pollutants and can be used as an estimate of carcinogenicity in the absence of animal studies.

ISSN:0360-1226    

DOI:10.1080/10934528909375531

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Algal assays were used to establish toxicity guidelines for natural waters. ‘Cu equivalent’ rather than the conventional EC 50 value was used as the toxicity unit. By correlating Cu dosages with%of control growth, Cu reference curves were constructed for our test species,ChlorellaandScenedesmus. These Cu curves, which compensated for species sensitivity differences, were then used to translate algal growth response to toxicity of the test waters. Expressed in Cu equivalent, our test waters displayed a toxicity range from 25 to 300 ug Cu.l‐1. After further tests with Cu on organisms such as algae,Daphniaand rainbow trout, ‘sensitive’ water where delicate plankton species could not survive, was found at Cu eq. concentrations between 90 and 120 ug.l‐1.

ISSN:0360-1226    

DOI:10.1080/10934528909375532

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A method for the determination of phenolic pollutants in water using an automated permeation sampler is described. Phenols permeating through a membrane are purged into a sampling tube containing Tenax‐TA adsorbent. Samples collected are thermally desorbed onto a capillary column gas chro‐matograph. Phenolic concentrations as low as 10 ppb for several phenols can be achieved by this method. The automated permeation sampler provides an alternative way to monitor concentration of phenolic pollutants. This method has several advantages over the conventional method, such as eliminating time‐consuming preconcentration steps, avoiding use of solvents and providing a high degree of automation.

ISSN:0360-1226    

DOI:10.1080/10934528909375533

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

ESTUARINE CIRCULATION Edited by Bruce J. Neilson, John Brubaker, and Albert Kuo Published by The Humana Press Inc., Clifton, New Jersey 07015 x + 377 pp., March 1989, $79.50.

ISSN:0360-1226    

DOI:10.1080/10934528909375534

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0360-1226    

DOI:10.1080/10934528909375520

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor