Manganese to life and health. Generally, exposure to ambient Mn air concentrations in excess of 5 μg Mn/m3 can lead to Mn-induced symptoms. Increased ferroportin protein expression in human embryonic kidney (HEK293) cells is associated with decreased intracellular Mn concentration and attenuated cytotoxicity, characterized by the reversal of Mn-reduced glutamate uptake and diminished lactate dehydrogenase leakage. Waterborne manganese has a greater bioavailability than dietary manganese. According to results from a 2010 study, higher levels of exposure to manganese in drinking water are associated with increased intellectual impairment and reduced intelligence quotients in school-age children. It is hypothesized that long-term exposure due
Manganese Mines Mines Wildlife Management Area, a conservation area. The main industry is now farming. The name of this community derives from the discovery and mining of manganese here, beginning in the 1880s and ending in the 1890s. Also, Lafarge Canada operated a limestone quarry at Manganese Mines which closed in 1996. The limestone was used to produce cement. Manganese Mines Manganese Mines is an unincorporated community in Colchester County, Nova Scotia, Canada. This community is located about six miles north-east of Truro, between the South Branch North River and the Salmon River. The land was previously part of Onslow Township. It