نتایج جستجو برای: mercury hygiene

تعداد نتایج: 65017  

Journal: :Environmental pollution 2008
Bagie M George Darold Batzer

Accumulation of mercury in wetland ecosystems has raised concerns about impacts on wetland food webs. This study measured concentrations of mercury in invertebrates of the Okefenokee Swamp in Georgia, focusing on levels in amphipods, odonates, and crayfish. We collected and analyzed total mercury levels in these invertebrates from 32 sampling stations across commonly occurring sub-habitats. Sam...

Journal: :Environmental toxicology and chemistry 2003
Toby E Frescholtz Mae S Gustin David E Schorran George C J Fernandez

Foliar accumulation of mercury has been demonstrated to occur as plants leaf out, yet the primary source of this mercury is not known. Using closed-system growth chambers, uptake of mercury by quaking aspen (Populus tremuloides) foliage was measured over time as a function of soil mercury concentrations (0.01, 6.2, and 25.6 microg/g) and atmospheric mercury exposure concentrations (1.4, 14.9, a...

Journal: :Clinical chemistry 2005
Chunying Chen Liya Qu Bai Li Li Xing Guang Jia Tiancheng Wang Yuxi Gao Peiqun Zhang Mei Li Wei Chen Zhifang Chai

BACKGROUND Mercury is a ubiquitous and highly toxic environmental pollutant. In this study, we evaluated the relationship between mercury exposure and oxidative stress, serum and urinary mercury concentrations, oxidative DNA damage, and serum redox status in chronically mercury-exposed persons compared with healthy controls. METHODS We measured urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG), wh...

ژورنال: سلامت کار ایران 2011
حسن زاده, جعفر, قادری, ابراهیم , نقاب, مسعود , چوبینه, علیرضا ,

  Background and aims   Dentists are occupationally exposed to elemental mercury from placements of mercury-containing amalgam. Although many studies have been conducted on mercury intoxication, there is still widespread concern about possible ill effects of chronic low-level mercury exposure on dentists. The present study examined the effects of occupational exposure to low levels of mercury b...

اوصانلو, محمود , شیرخانلو, حمید , قربان دادرس, ارکیده ,

Introduction: Mercury is one of the toxic metals that damages the nervous system and kidneys. Therefore, monitoring of mercury vapors in the environments is essential. .Material and Method: A new adsorbent was made from silver nanoparticles on a bed of quartz. The nano-adsorbent was capable for sampling of the trace amounts of mercury vapor from air. In this study, the required mercury vapor ...

1997

This chapter first presents available measurement data for mercury in environmental media and biota. This is followed by a discussion of efforts to collect measurement data from remote locations and near anthropogenic sources of concern. Note that this chapter does include measured mercury concentrations in wildlife that function as vectors to humans but does not include measured concentrations...

2006
Sergio Navarro

The various methods of treatment to mercury toxicity in the human body have been studied and investigated with somewhat mixed conclusions. This paper discusses the various types of mercury, the cycle of mercury in the environment, human exposure to mercury and treatment, and methods of reducing mercury pollution and its effect in the human population in the U.S.

Background and objectives: Methyl mercury can carry out harmful effects on the reproductive, respiratory, and nervous system of human. Moreover, mercury is known as the most toxic heavy metal in nature. Fish and seafood consumption is the major MeHg exposure route for human. The present study tries to cover researches which have been conducted on mercury levels in 21 species of fish from Persia...

Journal: :Journal of applied toxicology : JAT 1992
S A Katz R B Katz

Relationships have been established between the concentrations of mercury in human scalp hair and environmental or dietary mercury exposures. For chronic exposures, the hair/blood ratio for mercury is in the range 200:1-300:1, and scalp hair mercury concentrations of greater than 5 ppm are indicative of mercury intoxication. These observations, coupled with the ease by which samples may be coll...

Journal: :international journal of occupational and environment medicine 0
smj mortazavi 1the center for research on protection against ionizing and non-ionizing radiationand medical physics department, shiraz university of medical sciences, shiraz, iran m neghab school of health and nutrition and research center for health sciences, shiraz university of medical sciences, shiraz, iran smh anoosheh student research center, school of health and nutrition, shiraz university of medical sciences, shiraz, iran n bahaeddini school of mechanics, shiraz university, shiraz, iran g mortazavi school of dentistry, shiraz university of medical sciences, shiraz, iran p neghab school of dentistry, kish international branch of shiraz university of medical sciences, kish, iran

mercury is among the most toxic nonradioactive elements which may cause toxicity even at low doses. some studies showed release of mercury from dental amalgam fillings in individuals who used mobile phone. this study was conducted to assess the effect of high-field mri on mercury release from dental amalgam filling. we studied two groups of students with identical tooth decays requiring a simil...

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