methylmercury

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di·meth·yl·mer·cu·ry

(dī-meth'il-mĕr'kyū-rē),
A contaminant of seafood products synthesized in sediments from mercury and mercury-containing chemicals dumped in waters supporting marine life. Methylmercury is concentrated in aquatic life forms and can thus be deposited in fish intended for human consumption. Probable cause of Minamata disease, a teratogenic condition characterized by multiple birth defects in Japan. An inorganic reagent.
See also: Minamata disease.
Synonym(s): methylmercury

methylmercury

An inorganic mercury industrial pollutant. It is concentrated up the food chain, is teratogenic, and causes severe CNS defects in children whose mothers consumed methylmercury-contaminated seafood while pregnant.

methylmercury

Dimethyl mercury Toxicology An inorganic mercury industrial pollutant; it is concentrated up the food chain, teratogenic and causes severe CNS defects in children whose mothers consumed MM-contaminated seafood while pregnant. See Mercury, Minamata disease.

methylmercury

, methyl mercury (me-thil-mer'ku-re)
An organic mercury compound produced from inorganic mercury by the addition of a methyl group (CH3) by marine and soil bacteria. This compound is readily taken up by plankton, which are then consumed by marine invertebrates, and subsequently by marine predators, in which it concentrates. Finally, it can enter the human body when people eat fish having high concentrations of the compound, such as salmon or halibut (among others). It can also be absorbed into the body through the skin and respiratory tract. Methylmercury is neurotoxic to humans, esp. children. See: mercury poisoningMinamata disease
References in periodicals archive ?
Methyl mercury, but not inorganic mercury, associated with higher blood pressure during pregnancy.
Role of glutathione and hepatic glutathione S-transferase in the biliary excretion of methyl mercury, cadmium and zinc a study with enzyme inducers and glutathione depletors.
However, notes the HEAL study, it is prenatal exposure and maternal mercury levels that are particularly alarming because small amounts of methyl mercury can cause irreversible health effects on a developing brain compared with that of an adult.
The chemical species that matter are various complexes of the mercuric ion with different organic and inorganic legends, methyl mercury, dimethyl mercury and elemental mercury.
Your body absorbs methyl mercury easily when you ingest it orally.
Exposure to methyl mercury in adults has been associated with neurobehavioral abnormalities.
Thimerosal contains ethyl mercury, which is different from the methyl mercury that we all remember as the silvery liquid substance found in old thermometers.
According to World Health Organisation (WHO), thiomersal does not contain methyl mercury, which is a naturally-occurring compound and whose toxic effects on humans have been well-studied.
Methyl mercury concentrations in macroinvertebrates and fish from burned and undisturbed lakes on the Boreal Plain.
Sonny Sonnenfeld's concern that comparing inhalation of mercury to ingestion of methyl mercury is not scientific (LD+A, October, "Letters") reminded me of my chemistry days.