Anthropogenic practices and recycling in the environment through natural processes result in release of potentially harmful levels of mercury into the biosphere. Mercury, especially organic forms, accumulates in the food chain. Mercury reacts readily with sulfur-containing compounds and often exists as a thiol S-conjugate, such as the l-cysteine (Cys)-S-conjugate of methylmercury (CH(3)Hg-S-Cys...

Mercurials have been shown to cause apoptosis in human T cells. The objective of this study was to evaluate and compare the relative susceptibility of resting versus activated T cells to methyl mercury chloride (MeHgCl)-induced cell death. Apoptosis was assessed by Hoechst 33258 and 7-AAD staining and annexin V binding. Our results show that activation of T cells by PHA, PMA, and ionomycin, or ...

Background. Since it is possible for carbamide peroxide (CP) bleaching agent to contact old amalgam restorations, the present in vitro study evaluated the amount of dissolved mercury released from amalgam restorations with various percent-ages of silver content subsequent to the use of 15% CP. Methods. Thirty ANA 2000 amalgam disks with 43.1% silver content and thirty ANA 70 amalgam disks with ...

Objective. The purpose of this review paper is to review the literature regarding the toxicology of mercury from dental amalgam and evaluate current statements on dental amalgam. Materials and Methods. Two key-words "dental amalgam" and "toxicity" were used to search publications on dental amalgam biocompatibility published in peer-reviewed journals written in English. Manual search was also co...

Organic matter isolated from the Florida Everglades caused a dramatic increase in mercury release (up to 35 μM total dissolved mercury) from cinnabar (HgS), a solid with limited solubility. Hydrophobic (a mixture of both humic and fulvic) acids dissolved more mercury than hydrophilic acids and other nonacid fractions of dissolved organic matter (DOM). Cinnabar dissolution by isolated organic ma...

We read with great interest the article entitled “An arrhythmic episode after mercury exposure and successful treatment with chelation therapy: A case report.” by Karakulak et al. (1) reporting a case of acute mercury (vapor) poisoning followed by 7-day history of malaise, fatigue, proximal weakness in the legs and in the arms, atypical chest pain, and palpitation in a 32-year-old woman in publ...

We have previously demonstrated that chronic exposure to low-dose of mercury induced endothelial dysfunction and increased vasoconstrictor responses. The aim of this work was to investigate if mercury exposure alters contractile prostanoids production from cyclooxygenase-2 (COX-2) and its contribution to phenylephrine responses. For this, aortic segments from 3-month old Wistar rats daily treat...

STATEMENT OF PROBLEM The use of dental amalgam as a direct restorative material has been a subject of controversy for many years. The potential safety of amalgam has been questioned because of leakage of elements such as mercury, copper, tin, and silver. PURPOSE This study evaluated the elemental leaching from Tytin dental amalgam placed in deionized water for 2 months. Both mercury vapor and...

An investigation was conducted on the effect of organic matter (OM) and pH on mercury (Hg) release from soils. Hg release flux was measured using the dynamic flux chamber (DFC) combined with the Lumex multifunctional mercury analyzer in both laboratory experiment and field monitoring. The results showed that Hg emission from the OM-added soils was apparently low because of the high affinity of ...