AIMS To establish and analyse reference data for the mercury burden of patients with and without amalgam fillings. METHODS Atomic absorption spectroscopy was used to quantify Hg concentrations in the scalp hair and urine (before and after application of dimercaptopropane sulphonate), and Hg release from dental amalgams (using a newly developed, amalgam specific chew test), in 2223 subjects. ...

Water injection strategy is considered a promising technique to improve the performance of boosted engine and reduce NOx emission via latent heat water vaporization. Numerous research on has been conducted in-cylinder intake port injection. However, focusing spark ignition (SI) exhaust system still lacking. This study proposed pre-turbocharger turbine (PTWI) concept inlet temperature. was done ...

mercury is the most toxic heavy metal in the aquatic ecosystems which originates both from natural and industrial resources and is ultimately deposited in sediments as methyl mercury. this metal is quickly transferred through the food chain and accumulated in organisms. in this study, the human health risk due to consumption of mullet ( liza aurata ) in the caspian sea, were evaluated by measur...

There is a dramatic lack of data on Hg levels in marine organisms from tropical areas, and in particular from New Caledonia. For the first time, this study reports the total Hg concentrations in the tissues of several marine taxa from the New Caledonian lagoon. Seafood from both wild and farmed populations was considered. Hg concentrations varied over three orders of magnitudes according to fac...

Salmon is a kind of fish which has good nutrition for human but it can be contaminated by heavy metal such as arsenic. In risk assessment , the provisional tolerable weekly intake (PTWI) for inorganic arsenic is 15 μg/kg b.w./week and the organic forms of arsenic present in sea foods need different consideration from the inorganic arsenic in water. There are no reports of toxicity in man or ani...

We evaluated the transfer of Pb from shot to meat during the preparation of breasts of quails with 0, 1, 2 or 4 embedded Pb shot. A traditional Spanish recipe was used which utilizes vinegar during cooking to enhance the long-term preservation of the meat. The effect of the acidic conditions generated by the vinegar on Pb transfer was compared with the same recipe when the vinegar was substitut...

This article proposes statistical tools for quantitative evaluation of the risk due to the presence of some particular contaminants in food. We focus on the estimation of the probability of the exposure to exceed the so-called provisional tolerable weekly intake (PTWI), when both consumption data and contamination data are independently available. A Monte Carlo approximation of the plug-in esti...

this study has paied to investigation and comparison of content hg in imported rice from indian country and cultivated rice (oryza sativa( in borojerd and isfehan provinces in iran. 30 types of indian imported rice and 5 type iranian rice available in market of iran in 4 repeat from every type. the first step, grains of raw rice were digested by acid digestion method and then were analyzed for ...

Located in Teluk Bayur bay the port is of five biggest and busiest ports Indonesia. High sea transportation activities anthropogenic may lead to heavy metal pollution. The purpose this study was determine concentration Pb Cu metals, seagrass (Sargassum sp.) analyze feasibility consuming Sargassum sp. method used a survey method, by analyzing at Laboratory Pekerjaan Umum Riau Province. water qua...