Results 191 to 200 of about 12,704 (208)
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Algal density dependent bioconcentration factors of hydrophobic chemicals
Chemosphere, 1995Abstract The bioconcentration factors (BCFs) of anthracene, hexachlorobenzene, 4,4′-dichlorobiphenyl, and 2,2′5,5′-tetrachlorobiphenyl decreased with increasing density of the algae Chlorella vulgaris and Chlorella pyrenoidosa. Concomitant with algal density, the organic carbon concentration as measured by chemical oxygen demand (COD) in the aqueous ...
Dick T.H.M. Sijm +2 more
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Reevaluation of dioxin bioconcentration and bioaccumulation factors for regulatory purposes
Journal of Toxicology and Environmental Health, 1992Bioconcentration factors (BCF) or bioaccumulation factors (BAF) reported for 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD or dioxin) in aquatic environments encompass a wide range of values, from less than 1000 to 189,000 l/kg. These values are based on concentrations of TCDD in various environmental media including water, sediment, or food.
W R, Sherman, R E, Keenan, D G, Gunster
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Bioconcentration factor of relatively low concentrations of chlorophenols in Japanese medaka
Chemosphere, 2005Bioconcentration factors (BCF) for pentachlorophenol (PCP) and 2,4-dichlorophenol (2,4-DCP) in Japanese medaka (Oryzias latipes) were determined at five different concentrations of the chemicals, between 0.1 and 10 microg/l (PCP), 0.3 and 30 microg/l (2,4-DCP), in the ambient water.
Takuya, Kondo +6 more
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Estimation of bioconcentration factors using molecular electro-topological state and flexibility
SAR and QSAR in Environmental Research, 2008Bioconcentration assessment is important in the scientific evaluation of risks that chemicals may pose to humans and environment and is a current focus of regulatory effort. In this work, a new QSAR model by adopting electronic topological properties and flexibility of chemicals to predict the bioconcentration factor (BCF) in fish was established based
Y, Wang +4 more
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[Estimation of bioconcentration factor of benzene derivatives].
Ying yong sheng tai xue bao = The journal of applied ecology, 2007To estimate the bioconcentration factor (BCF) of benzene derivatives in fish by gas chromatography retention time (t(R)), this paper measured the BCF of chlorobenzene, o-chloro-toluene, p-dichlorobenzene, m-dichlorobenzene, 1,2-dichlorobenzene, nitrobenzene, p-chloro-aniline, p-chloro-nitrobenzene, and 4-chlorodiphenyl in grass crap, and the t(R) of ...
Jingfang, Xie +4 more
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Bioconcentration of chromium in edible mushrooms: Influence of environmental and genetic factors
Food and Chemical Toxicology, 2013Chromium concentrations were determined in 167 samples of wild edible mushrooms, collected from three different sites (urban, traffic and pastureland areas) in Lugo (NW Spain). The hymenophore (H) and the rest of the fruiting body (RFB) were analysed separately. The analyses were performed using inductively coupled plasma optical emission spectrometry (
M A, García, J, Alonso, M J, Melgar
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Prediction of the Bioconcentration Factor of Organic Compounds in Fish
CLEAN – Soil, Air, Water, 2009AbstractQuantitative structure‐activity relationship (QSAR) models for bioconcentration factor (BCF) prediction applicable to 131 organic compounds of different chemical structures were prepared. The study showed that the best QSAR model, pBCF = 0.00250227 MW – 0.0723952 ET – 0.21352 εHOMO – 0.892481 eLUMO – 2.58291, was made from four quantum chemical
Vishnu Kumar Sahu, Rajesh Kumar Singh
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Water Research, 1993
Abstract The bioconcentration, and subsequent elimination, of zinc by the freshwater amphipod Gammarus pulex (L.) were determined experimentally in the laboratory at five zinc exposure concentrations (0.41–2.02 mg/l). A first-order kinetic model, modified for naturally occurring trace chemicals, was then used to calculate uptake ( K 1 ) and ...
Qin Xu, David Pascoe
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Abstract The bioconcentration, and subsequent elimination, of zinc by the freshwater amphipod Gammarus pulex (L.) were determined experimentally in the laboratory at five zinc exposure concentrations (0.41–2.02 mg/l). A first-order kinetic model, modified for naturally occurring trace chemicals, was then used to calculate uptake ( K 1 ) and ...
Qin Xu, David Pascoe
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How meaningful is the bioconcentration factor for risk assessment?
Chemosphere, 1996Abstract Although bioconcentration factors (BCFs) of a chemical may vary considerably due to different species, laboratories, lipid content, and test conditions it is generally agreed that high BCFs are cause for concern whereas low BCFs signalise no risk.
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Bioconcentration factors and plant–water partition coefficients of munitions compounds in barley
Chemosphere, 2017Plants growing in the soils at military ranges and surrounding locations are exposed, and potentially able to uptake, munitions compounds (MCs). The extent to which a compound is transferred from the environment into organisms such as plants, referred to as bioconcentration, is conventionally measured through uptake experiments with field/synthetic ...
Tifany L. Torralba–Sanchez +3 more
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