The trouble with TEFs.
نویسندگان
چکیده
Comments on Van den Berg, et al. Toxic equivalency factors (TEFs) for PCBs, PCDDs, PCDFs for humans and wildlife. Environ Health Perspect 106:775-792 (1998)
منابع مشابه
Toxic equivalency factors (TEFs) for PCBs, PCDDs, PCDFs for humans and wildlife.
An expert meeting was organized by the World Health Organization (WHO) and held in Stockholm on 15-18 June 1997. The objective of this meeting was to derive consensus toxic equivalency factors (TEFs) for polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) and dioxinlike polychlorinated biphenyls (PCBs) for both human, fish, and wildlife risk assessment. Based on existing literat...
متن کاملTrophic Enrichment Factors for Blood Serum in the European Badger (Meles meles)
Ecologists undertaking stable isotopic analyses of animal diets require trophic enrichment factors (TEFs) for the specific animal tissues that they are studying. Such basic data are available for a small number of species, so values from trophically or phylogenetically similar species are often substituted for missing values. By feeding a controlled diet to captive European badgers (Meles meles...
متن کاملThe Composition of the Arabidopsis RNA Polymerase II Transcript Elongation Complex Reveals the Interplay between Elongation and mRNA Processing Factors.
Transcript elongation factors (TEFs) are a heterogeneous group of proteins that control the efficiency of transcript elongation of subsets of genes by RNA polymerase II (RNAPII) in the chromatin context. Using reciprocal tagging in combination with affinity purification and mass spectrometry, we demonstrate that in Arabidopsis thaliana, the TEFs SPT4/SPT5, SPT6, FACT, PAF1-C, and TFIIS copurifi...
متن کاملToxic equivalency factors for dioxin-like PCBs.
The WHO-European Centre for Environment and Health (WHO-ECEH) and the International Programme on Chemical Safety (IPCS), have initiated a project to create a data base containing information relevant to the setting of Toxic Equivalency Factors (TEFs), and, based on the available information, to assess the relative potencies and to derive consensus TEFs for PCDDs, PCDFs and dioxin-like PCBs. Ava...
متن کاملvan Leeuwen's Response
W, Connolly R. Concerns with the use of a toxic equivalency factor (TEF) approach for risk assessment of "dioxin-like" compounds. In our paper, "Toxic Equivalency Factors (TEFs) for PCBs, PCDDs, PCDFs for Humans and Wildlife" (1), we described the results of a World Health Organization (WHO) working group that evaluated the existing TEFs for human risk assessment and derived consensus TEFs for ...
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ورودعنوان ژورنال:
- Environmental Health Perspectives
دوره 107 شماره
صفحات -
تاریخ انتشار 1999