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Methylmercury (sometimes methyl mercury) is an organometallic cation with the formula [CH 3 Hg] +. It is the simplest organomercury compound. Methylmercury is extremely toxic, and its derivatives are the major source of organic mercury for humans.
Methylmercury is the major source of organic mercury for all individuals. [38] Due to bioaccumulation , it works its way up through the food web and thus biomagnifies, resulting in high concentrations among populations of some species.
Inorganic mercury (Hg2+/HgII) and particle-bound mercury (Hg(P)) enter through wet and dry deposition. In addition, mercury enters the ocean via rivers, estuaries, sediments, hydrothermal vents, etc. [11] These sources also release organic mercury compounds such as methylmercury. Once they are in the ocean they can undergo many reactions ...
lack the ability to efficiently excrete both methylmercury (Rowland et al., 1983) and inorganic mercury (Thomas and Smith, 1979), and that there is a higher lactational transfer of inorganic mercury than methylmercury (Sundberg et al., 1991a,b). Correspondingly, it has been shown that infants exposed via milk from mothers who were accidentally
Non-point sources include floods that create hospitable habitats for bacteria that can convert mercury to methylmercury, which is the toxic form that bioaccumulates through aquatic food webs. The effects of these different sources of mercury have been studied at the Experimental Lakes Area in Ontario, Canada , using research procedures ...
The cell damage is irreversible. The half-life of methylmercury in human tissue is 70 days, which allows it ample time to accumulate to toxic levels. Humans are exposed to methyl mercury from the consumption of aquatic species. As mercury bioaccumulates through the food chain, the amount of methyl mercury increases to these toxic levels. [11 ...
However, methylmercury is taken up at a faster rate than other forms and bioaccumulates to a greater extent. The biomagnification of methylmercury has a most significant influence on the impact on animals and humans. Fish appear to bind methylmercury strongly, nearly 100 percent of mercury that bioaccumulates in predator fish is methylmercury. [21]
The FDA determined that the data presented in a 2022 color additive petition show that this ingredient causes cancer in male laboratory rats exposed to high levels of FD&C Red No. 3 because of a ...