In recent years, the Coastal Water Research Project has conducted surveys of the distribution of certain trace substances in sediments around the major municipal wastewater outfalls off southern California. Because of high levels of heavy metals found in sediments near Los Angeles County Sanitation Districts outfall system off Whites Point in 1970, detailed surveys of the Palos Verdes shelf wer...

heavy metals, in particular mercury, are important for the public health due to their toxicity and endurance in the environment. in the present study, the distribution of mercury was surveyed along the coast of the caspian sea (mazandaran province). twelve stations were selected and from each station 5 samples were randomly collected followed by chemical analyses. an inverse weight-distance met...

Mercury is a potent toxicant of concern to both the general public and occupationally exposed workers (e.g., dentists). Recent studies suggest that several genes mediating the toxicokinetics of mercury are polymorphic in humans and may influence inter-individual variability in mercury accumulation. This work hypothesizes that polymorphisms in key glutathione synthesizing enzyme, glutathione S-t...

The extracellular speciation of mercury may control bacterial uptake and methylation. Mercury-polysulfide complexes have recently been shown to be prevalent in sulfidic waters containing zero-valent sulfur. Despite substantial increases in total dissolved mercury concentration, methylation rates in cultures of Desulfovibrio desulfuricans ND132 equilibrated with cinnabar did not increase in the ...

This study was conducted to evaluate the effects of mercury stress on growth, photosynthesis and mercury accumulation in different cultivars of a non-food energy crop, Jerusalem artichoke, and to screen appropriate cultivars for their efficacy in the phytoremediation of mercury (Hg2+) contaminated soil. Cultivars LZJ033 (high above-ground biomass and nutrient content, and strongly sexual reprod...

Kodaikkanal, India, suffered mercury contamination due to emissions and waste from a thermometer factory. Kodai Lake is situated to the north of the factory. The present study determined mercury in waters, sediment and fish samples and compared the values with those from two other lakes, Berijam and Kukkal. Total mercury (Hg(T)) of 356-465 ng l(-1), and 50 ng l(-1) of mercury in methyl mercury ...

Mercury bioaccumulation is frequently observed in marine ecosystems, often with stronger effects at higher trophic levels. We compared total mercury (THg) and methylmercury (MeHg) from muscle with length, comparative isotopic niche, and diet (via δ13C and δ15N) among four sympatric coastal sharks in Florida Bay (USA): blacknose, blacktip, bull, and lemon. Mercury in blacknose and blacktip shark...

Potosi mine in Bolivia was the largest one of silver, where mercury amalgam method was used in 16th to 18th century. The total amount of used mercury was estimated at 7500 tons, which is 12 times as much as in Minamata, Japan. First, the atmospheric diffusion of mercury at Potosi was calculated with the atmospheric dispersion model. The fall mercury distributed in the normal distribution over a...

The present investigation has been undertaken to evaluate role of Wheat grass extract in modifying mercury-induced biochemical alterations in albino rats. Mercuric chloride 5 mg/kg body weight i.p. was given on 11, 13 & 15th day of the experiment. Wheat grass extract (400 mg/kg) and Quercetin (10 mg/kg) were administered 10 days before mercuric chloride administration and continued up to 30 day...