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Substance and Sources
News and Discoveries
Avoiding PCBs: Living the Science Recommendations and Resources
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Substance and Sources:
What are Polychlorinated biphenyls (PCBs)?
Polychlorinated biphenyls are a class of man-made chlorinated compounds (known as congeners) that are either oily liquids or solids. PCBs are often colorless and have no smell or taste. PCBs often exist as vapor around a primary exposure source (e.g. from building materials).
Common Sources:
Although the primary source of PCBs is often from building materials and manufacturing, PCB vapors are transferred to plants and animals which are then consumed – thus passing PCBs from the environment, to another organism and then to another organism. As such, a major source of exposure for PCBs is from food. PCB exposure can also be a consequence of occupation. PCB bioaccumulation can also be passed from one generation to the next via transfer from a Mother to a fetus during pregnancy or afterwards via breast milk.
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Read more... [Polychlorinated Biphenyls (PCBs)]
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Substance and Sources
Health Effects
Avoiding Mercury: Living the Science Recommendations and Resources
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Research References
Substance and Sources:
What is Mercury?
Mercury (Hg) is a heavy metal and is liquid at or near room temperature. Mercury is mostly obtained from the mineral cinnabar and is deposited worldwide. Although Mercury is harmless in insoluable forms (e.g. mercuric sulfide) it poisonous in its soluble forms (e.g. mercuric chloride, methylmercury).
Common Sources:
Although most modern uses of mercury tend to be industrial (e.g used to make laboratory equipment and some types of telescopes), mercury is a very common ingredient in mascara and is present in nearly all dental amalgams. Humans are often exposed to mercury when they consume fish that have stores of mercury in their bodies. Larger fish like shark, swordfish, and tilefish tend to store larger amounts of mercury in their tissues. |
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Read more... [Mercury]
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