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dc.contributor.authorChen, CYen_US
dc.contributor.authorLin, JHen_US
dc.date.accessioned2014-12-08T15:17:36Z-
dc.date.available2014-12-08T15:17:36Z-
dc.date.issued2006-01-01en_US
dc.identifier.issn0045-6535en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.chemosphere.2005.06.060en_US
dc.identifier.urihttp://hdl.handle.net/11536/12772-
dc.description.abstractA closed-system algal toxicity test with no headspace was applied to evaluate the toxicity of chlorophenols to Pseudo-kirchneriella subcapitala. The dissolved oxygen production and the growth rate based on cell density were the response endpoints. Phenol and seven chlorophenols were tested using the above test technique. Median effective concentrations (EC50) range from 0.004 to 25.93 mg/l (based on DO production) and 0.0134 to 20.90 mg/l (based oil growth rate). No-observed-effect concentration (NOEC) is within the range of 0.001-8.19 mg/l. In general, growth rate is a more sensitive response endpoint than the oxygen production, except for the case of pentachlorophenol. However, the differences in sensitivity between the two parameters were marginal. Furthermore, quantitative structure-activity relationships (QSAR's) based on the n-octanol/water partition coefficient (log P) and the acid dissociation constant (pK(a)) values were established with R-2 ranged from 0.90 to 0.96. From literature data also based on P. subcapitata, the new test method is 1.65-108 times more sensitive than the conventional algal batch tests. A completely different relative-sensitivity relationship among various aquatic organisms was thus observed. The results of this study indicate that the toxicity data of volatile organic chemicals derived by conventional algal toxicity tests may severely underestimate the impact of these toxicants. Our results show that alga is very sensitive to chlorophenols compared to other aquatic organisms Such as the luminescent bacteria (the Microtox test), Daphnia magna, and rainbow trout. (c) 2005 Elsevier Ltd. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectalgaeen_US
dc.subjectchlorophenolsen_US
dc.subjectEC50en_US
dc.subjectphotosynthesisen_US
dc.subjectPseudokirchneriella subcapitalaen_US
dc.titleToxicity of chlorophenols to Pseudokirchneriella subcapitata under air-tight test environmenten_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.chemosphere.2005.06.060en_US
dc.identifier.journalCHEMOSPHEREen_US
dc.citation.volume62en_US
dc.citation.issue4en_US
dc.citation.spage503en_US
dc.citation.epage509en_US
dc.contributor.department環境工程研究所zh_TW
dc.contributor.departmentInstitute of Environmental Engineeringen_US
dc.identifier.wosnumberWOS:000234955800001-
dc.citation.woscount26-
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