Scientific Facts on Dioxins
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چکیده
Level 2 Details on Dioxins 1. What are dioxins?..........................................................................................................2 1.1 What are dioxins chemically?............................................................................................2 1.2 How are dioxins formed?.................................................................................................2 1.3 What happens to dioxins when they enter the environment?.................................................2
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QSAR Studies of the Dioxins and Interaction of OCDD with Calix[4] Arene Using DFT
Quantum chemical calculations, based on Density Functional Theory (DFT) method, were performed on Calix[4]arene and Polychlorinated Dibenzo-p-dioxins (PCDDs) in gas and liquid phases for comparison purposes. The simulation results show the 1,2,3,4, 6,7,8,9-octachlorodibenzo-p-dioxin (OCDD) is quite a reactive dioxin. This paper attempts to examine the possibility of dioxin adsorption by Calix[n...
متن کاملComments on the “Opinion of the Scientific Committee on Food on the Risk As- sessment of Dioxins and Dioxin-like PCBs in Food. Update based on new scientific information available since the adoption of the SCF Opinion of 22 November 2000”
The Scientific Committee on Food decided to review its recommendation on the acceptable daily intake of dioxins (and dioxin-like PCB), only half a year after the original recommendation was made in November 2000. In the paper of May 2001 the SCF mentioned: “The Committee is asked to consider whether there is a need to update its opinion on the risk assessment of dioxins and dioxin-like PCBs in ...
متن کاملWhat We Have Achieved: An Introduction to a Case Study on Dioxins
Our achievements in a research project involving a case study on dioxins are presented by introducing the results. These achievements include the identification of emission sources, description of the dynamics in environmental media based on the congener-specific analysis and development of the integrated methods to evaluate and manage various types of risks due to dioxins. The risks to fetuses...
متن کاملEpidemiological approaches in the investigation of environmental causes of cancer: the case of dioxins and water disinfection by-products
I will refer in this paper to difficulties in research in environmental causes of cancer using as examples research on dioxins and on drinking water disinfection by-products (DBPs) that have created considerable controversy in the scientific and wider community. Dioxins are highly toxic chemicals that are animal carcinogens. For many years, evaluation of the carcinogenicity of dioxins in humans...
متن کاملDioxins and human toxicity.
The term dioxins usually refers to polychlorinated dibenzo-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). As 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD) has the highest toxic potential, the toxic potentials of other PCDDs and PCDFs are defined in comparison with it. Human exposure to dioxins can be environmental (background), occupational, or accidental pollution. In the human body,...
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