Bioconcentration can be described by a bioconcentration factor (BCF), which is the ratio of the chemical concentration in an organism or biota to the concentration in water: $${\displaystyle BCF={\frac {Concentration_{Biota}}{Concentration_{… In aquatic toxicology, bioconcentration is the accumulation of a water-borne chemical substance in an organism exposed to the water. There are several ways in which to measure and assess See more A bioconcentration factor greater than 1 is indicative of a hydrophobic or lipophilic chemical. It is an indicator of how probable a chemical is to bioaccumulate. These chemicals have high lipid affinities and will concentrate in tissues with high lipid content instead of … See more In determining the degree at which bioconcentration occurs biological factors have to be kept in mind. The rate at which an organism is exposed through respiratory surfaces and contact with dermal surfaces of the organism, competes against … See more Regulatory uses Through the use of the PBT Profiler and using criteria set forth by the United States Environmental Protection Agency under the Toxic Substances Control Act (TSCA), a substance is considered to be not bioaccumulative if it … See more Predictions Bioconcentration factors facilitate predicting contamination levels in an organism based on chemical concentration in surrounding water. BCF in this setting only applies to aquatic organisms. Air … See more Temperature Temperature may affect metabolic transformation, and bioenergetics. An example of this is the movement of the organism may … See more • PBT Profiler • Ruth "The Hammer" Sofield • Persistent Organic Pollutants See more WebJul 13, 2024 · Per¿ and polyfluoroalkyl substances (PFAS) are a group of man¿made chemicals of concern across the globe, and some of the PFAS chemicals are known to be bioaccumulative in aquatic species. A literature search for bioconcentration factors (BCFs) and bioaccumulation factors (BAFs) for PFASs has been done and data for 17 …

Fish Bioconcentration Data Requirement: Guidance for …

Webpossible the bioconcentration factor is calculated preferably both as the ratio (BCF ss) of concentration in the fish (C f) and in the water (C w) at apparent steady-state and as a kinetic bioconcentration factor, BCF K (Annex 1.5) as the ratio of the rate constants of uptake (k 1) and depuration (k 2) assuming first-order kinetics(3). 8. Web名詞解釋: 生物自水中吸收化學物質而體內組織累積，使其體內之濃度高於環境濃度的現象。吸收化學物質的管道可直接自體表、腸管或鰓。各種化學物質經生物濃縮作用在體內累 … chipley sanders

How to calculate BCF(Bioconcentration Factor)?

WebWhether crop intercropping can affect the uptake of phthalic acid esters (PAEs) by plant roots from soils is unclear. In this study, we compare the PAE uptake by plant roots between the wheat/maize intercropping and the wheat and maize monocropping in a field work. We show that the PAE bioconcentration factors of wheat and maize roots are remarkably … Web本发明提供一种采用微宇宙体系评价水体污染物生物有效性的装置及方法。首先构建实验装置，主要包括：环境条件控制体系、化合物给料体系和化合物暴露体系，特征在于：环境条件控制体系即人工气候培养箱，用于控制体系内环境条件；化合物给料体系和暴露体系通过蠕动泵相连，包括四种型号 ... WebBioaccumulation is the process of a chemical moving from the external environment into the organism from all possible exposure routes (water, sediment, soil, air, or diet) and is expressed as a bioaccumulation factor (BAF). Bioaccumulation in aquatic organisms from water alone is measured as the bioconcentration factor (BCF) (USEPA, 1999a,b). chipley tag office