Bioconcentration factor 生物
WebBioconcentration factor (BCF) is the heavy metal concentration present in the plant biomass divided by heavy metal in FA (Raj et al., 2024 ). It is an important parameter in … WebJul 15, 2024 · bioconcentration values for the test substance should be determined using at least two concentrations during the exposure phase which are a factor of 10 apart, plus the appropriate control(s). Preliminary toxicity tests or a range-finding test can be used to establish the appropriate test solution concentrations for the definitive test.
Bioconcentration factor 生物
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Web新たな生物蓄積性評価法. Lab-data . 餌（経口）からの間接的取り込み経路. BMF（biomagnification factor） Lab-data . 水（経鰓）からの直接的取り込み経路. … WebBCF（Bioconcentration Factor:生物濃縮係数）： 一定の期間水生生物が化学物質の曝露を受けたとき の生物体内の化学物質濃度を、その期間の周辺水中 の化学物質濃度で …
WebBioaccumulation is the uptake of substances via body surfaces (bioconcentration) and through food uptake (biomagnification). The bioconcentration factor (BCF) is the ratio … http://rem-main.rem.sfu.ca/papers/gobas/A%20Review%20of%20Bioconcentration%20factor%20(BCF)%20and.pdf
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 … WebBiomagnification, also known as bioamplification or biological magnification, is the increase in concentration of a substance, e.g a pesticide, in the tissues of organisms at successively higher levels in a food chain. [1] This increase can occur as a result of: Persistence – where the substance cannot be broken down by environmental processes.
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 …
WebThe information on aquatic species, other than fish, that pertains to bioconcentration factors, metabolism, and elimination is rather limited in the literature. The kinds of basic … optico planningWeb大量试验结果表明，微量的铯能保持生物体内电解质平衡，但过量的铯具有毒性作用，这种双重作用表现出了铯在生物学功能调节和效应中的复杂性[7]。被铯污染的植物自身生长受到影响，铯直接导致菠菜(Spinacia oleracea)叶片光合作用受到抑制，降低其光合效率 ... opticoat canberraoptico-hypothalamic gliomasBioconcentration 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 opticoat wheelsWebBioconcentration Factor. The bioconcentration factor (BCF) describes the readiness of chemicals to concentrate in organisms when the compounds are present in the environment. It is a required eco-toxicological parameter for chemical regulation, for example REACH requires the BCF for all compounds produced or imported over 100 tons per year. optico mouseWebWhether 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 … portland grey ral numberWebOct 15, 2024 · In Table 1 we define the bio-uptake factors and terminology employed herein and widely used in modelling and monitoring studies. 1–5 The bioconcentration factor (BCF) expresses the increase in … opticocarotid recess