Bioconcentration factor 生物
WebCalculation. 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: = Bioconcentration factors can also be related to the octanol-water partition coefficient, K ow.The octanol-water partition coefficient (K ow) is correlated with the … 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 …
Bioconcentration factor 生物
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WebOct 10, 2024 · 生物濃縮係數 (Biocon Centration Factor，BCF)是指生物體內某種元素或難分解的化合物的濃度同它所生存的環境中該物質的濃度比值，可用以表示生物濃縮的程度，又稱濃縮係數、 生物富集係數 、生物積累率等 [2] 。. 生物濃縮係數是一個無量綱的數值。. 可 … Webbioconcentration factor 生物濃縮係数 【BOD】 ... 保健福祉省（DHHS）のNIOSH（国立労働安全衛生研究所） が発行している化学物質の毒性及び生物学的な影響をまとめたデータ集である。データは、幅広く専門誌等から取り上げられており、その範囲は世界一とい …
WebTranslations in context of "分配系数对" in Chinese-English from Reverso Context: 正辛醇-水分配系数对数值：4.84（欧盟2002年） WebBioconcentration factor (BCF) is the ratio of the concentration of the substance in a specific genus to the exposure concentration, at equilibrium (Paradigms Lost, 2006 )
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 WebBioconcentration Factor. The bioconcentration factor (BCF) describes the readiness of chemicals to concentrate in organisms when the compounds are present in the …
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 …
http://v2.lib.cqu.edu.cn/asset/search?key=K%3d+Kinetics theo zaferiouWebBioconcentration is the intake and retention of a substance in an organism entirely by respiration from water in aquatic ecosystems or from air in terrestrial ones.Bioaccumulation is the intake of a chemical and its concentration in the organism by all possible means, including contact, respiration and ingestion.Biomagnification occurs when the chemical is … theo zaid winnipegWeb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 ... theo zabelWebOct 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 … shutdown my computer safely nowWebestimates of the bioconcentration factor (BCF, sometimes denoted as K B) for organic chemicals with log K OW values up to about 9.0 can be obtained using the equation of Bintein et al. (13). The pre-estimate of the bioconcentration factor for such strongly hydrophobic substances may be higher than the steady-state bioconcentration factor … the oyu tolgoi mineWebBioconcentration and translocation of heavy metals in the soil-plants system in Machangqing copper mine, Yunnan Province, China ... 机译：中国云南云南铜矿土壤 - 植物系统中重金属的生物浓缩及易位 ... The extent of soil contamination was evaluated by calculating the Single factor pollution index (Pi) and Nemerow ... theo zacharisWebJan 15, 2024 · The aim of this work was to develop and critically evaluate several machine learning-based modelling tools for prediction of bioconcentration factor (BCF) in both a fish (Cyprinus carpio) and an invertebrate species (Gammarus pulex) for the first time. An open access fish BCF dataset was used in the first instance to build and compare 24 ... shut down my computer now