Bioconcentration factor 生物

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August undefined, 2024

WebNov 1, 1990 · Bioconcentration is the process of accumulation of water-borne chemicals by fish and other aquatic animals through nondietary routes. A proportionality constant relating the concentration of a chemical in water to its concentration in the aquatic animal at steady-state equilibrium is the bioconcentration factor (BCF). 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 …

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WebBioconcentration factor。生物濃縮倍率。特定時間暴露したときの水生生物中の化学物質の濃度を同じ時間または同じ期間の周辺の水中の濃度で割った値。生物濃縮係数とも言う。 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 … greenlee tempo locator

Evaluation of published bioconcentration factor (BCF) and ...

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 … 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 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 ... flying 8 balls ww2

分配系数对 - Translation into English - examples Chinese Reverso …

A review of bioconcentration factor (BCF) and …

WebBioconcentration 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. Web摘要：土壤中的农药残留会引起一系列环境危害,也会被农作物吸收富集,对食品安全和人畜健康造成潜在威胁.研究作物对残留农药的吸收,转运及其吸收机制对于农药的风险评估,新农药的创制以及残留农药的植物修复均有重要参考意义.本文以广泛种植的主食作物小麦为模式植物,用水培实验研究了 ... greenlee terminal crimping toolWebThe Bioaccumulation Factor (BCF) expresses the ability to accumulating metals in the roots. BCF is calculated as: [roots]/ [soil]. Usually plants with BCF higher than one (>1) have potential for ... flying 6 one piece

"WebOct 2, 2012 · This Test Guideline describes a procedure for characterising the bioconcentration potential of substances in fish, using an aqueous (standard and minimised tests) or dietary exposure, under flow-through conditions (but semi-static regimes are permissible). Independent of the chosen exposure method, the bioconcentration … " - Bioconcentration factor 生物

Bioconcentration factor 生物

Bioaccumulation, bioconcentration, biomagnification

WebJan 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 ... 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, …

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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 … 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 phytoremediation determining information on the metal uptake, its mobilization into the plant tissues, and storage in the shoot parts ( Newman & Unger, 2003 ).

WebResults showed that the bioconcentration factor of Cu was higher than 1 in the roots, stems and leaves of Avicennia trees and of Zn was higher than 1 in the roots of Rhizopora trees at station 1. Web重庆大学,数字图书馆,重大,论坛,bbs,forums,board,数图,电子邮件,民主湖,数据库,资料库,资源库,服务,资料库

WebBioconcentration factor ( BCF) is the concentration of a particular chemical in a biological tissue per concentration of that chemical in water surrounding that tissue. That is, a … 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 ...

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 …

Webdatabase sources includes 5317 bioconcentration factor (BCF) and 1656 bioaccumulation factor (BAF) values measured for 842 organic chemicals in 219 aquatic species. A data … greenlee threaded rod die #1458trodWebJan 1, 2016 · 4.1.3. Bioconcentration Factor (BCF) BCF is defined as the uptake of contaminants from the dissolved phase; it can be calculated by the following equation: (4.4) BCF = C / C w where C is the contaminant concentrations in the organisms (μg/kg) under equilibrium condition, C w is the contaminant concentration in the water (μg/L). A key … greenlee threading oilWeb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. … greenlee textron southaven msWebOct 2, 2012 · The dietary exposure bioconcentration fish test is used for substances where the aqueous exposure methodology is not practicable. In the three test methods the … flying 8 crossword clueWebBCF（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 … flying 8 motorcyclehttp://v2.lib.cqu.edu.cn/asset/search?key=K%3d+Kinetics flying 8 tattooWebpossible 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. greenlee threading machine