BACKGROUND Contamination of water by toxic chemicals has become commonly recognized as an environmental concern. Based on our clinical observation in Mashhad, northeastern Iran, many people might be at risk of exposure to high concentrations of toxic heavy metals in water. Because wastewater effluents as well as water wells have been commonly used for irrigation over the past decades, there has...

BACKGROUND In the Arctic, polar bears (Ursus maritimus) bio-accumulate mercury as they prey on polluted ringed seals (Phoca hispida) and bearded seals (Erignathus barbatus). Studies have shown that polar bears from East Greenland are among the most mercury polluted species in the Arctic. It is unknown whether these levels are toxic to liver and kidney tissue. METHODS We investigated the histo...

In this study a new method by Application of graphene oxide Nano sheets– Melamine –TioOxalic acid composite was exhibited as adsorbent for the elimination of toxic mercury (II) ions from aqueous solutions. The combine has the authority to adsorb the organic and inorganic combines. Through the immobilization of Melamine-TioOxalic acid (MTO) onto graphene oxide nanosheets, the desired composite w...

Mercury is released in the environment by various natural and anthropogenic activities. As mercury toxic, presence of high levels a major concern. One source humans dental amalgam fillings. Dental has been used for ages clinics hospitals restoring defective decayed teeth. This raises concern regarding use its disposal. The purpose this article to sensitize people about hazards mercury, make the...

Mercury is unique among the heavy metals in that it can exist in several physical and chemical forms, including elemental mercury, which is a liquid at room temperature. All forms of mercury have toxic effects in a number of organs, especially in the kidneys. Within the kidney, the pars recta of the proximal tubule is the most vulnerable segment of the nephron to the toxic effects of mercury. T...

Clarkson and Magos (2006) provide their perspectives on the toxicology of mercury vapor and dental amalgam. As scientists who are involved in preparing a German federal guideline regarding dental amalgam, we welcome additional scientific data on this issue. However, Clarkson and Magos do not present all the relevant studies in their review. The additional data provided here show that: (a) Denta...

The toxic effects of mercury are known to be complex with specific enzyme inhibitions and subsequent oxidative stress adding to the damaging effects. There are likely other factors involved, such as the development of impaired metal ion homeostasis and depletion of thiol and selenium based metabolites such as cysteine and selenium. Much of the toxicity of mercury occurs at the intracellular lev...

Mercury is a naturally occurring metal, one of the most toxic metals within the food chain and has a number of uses in the Irish health care sector. This paper reports on a mercury survey in Ireland with the purpose to present a picture of mercury use in health settings. The findings show 50% of health settings free of all mercury medical equipment. Mercury spills occur within 30% of health set...

Mercury exists naturally and as a man-made contaminant. The release of processed mercury can lead to a progressive increase in the amount of atmospheric mercury, which enters the atmospheric-soil-water distribution cycles where it can remain in circulation for years. Mercury poisoning is the result of exposure to mercury or mercury compounds resulting in various toxic effects depend on its chem...

Mercury is a highly potent cell toxin with effects on human and animal nervous systems. Mercury vapour released from dental amalgam is the predominant source of mercury in the human adult and foetal central nervous system in populations of developed countries. Only in small populations with high consumption of methyl mercury containing fish can the contribution from fish consumption reach or su...