نتایج جستجو برای: mercury

تعداد نتایج: 41855  

ژورنال: مجله دندانپزشکی 2006
حسنی طباطبائی, معصومه , شریعتی, بتول , گلبابائی, فریده ,

Background and Aim: Dentists are exposed to mercury from dental amalgam in their routine occupational practice. Excess exposure to mercury is harmful and the measurement of mercury content of urine is a reliable and valid assessment of the level of mercury exposure from dental amalgam. The aim of this study was the measurement of urine mercury in dentists of Tehran and assessment of some possib...

2009
Paul D. Selid Hanying Xu E. Michael Collins Marla Striped Face-Collins Julia Xiaojun Zhao

Mercury is a very toxic element that is widely spread in the atmosphere, lithosphere, and surface water. Concentrated mercury poses serious problems to human health, as bioaccumulation of mercury within the brain and kidneys ultimately leads to neurological diseases. To control mercury pollution and reduce mercury damage to human health, sensitive determination of mercury is important. This art...

Journal: :iranian journal of toxicology 0
سید محمود قاسم پوری seyed mahmoud ghasempouri department of environment, faculty of natural resources and marine sciences, tarbiat modares university, nour, iran نرجس اوکاتی narjes okati department of environment, faculty of natural resources, zabol university,zabol , iran عباس اسماعیلی ساری abbas esmaili-sari department of environment, faculty of natural resources and marine sciences, tarbiat modares university, nour, iran

background: mercury (hg) is a hazardous metal responsible for environmental contamination and human intoxication. methyl mercury bio-accumulation through food chain can be responsible for chronic mercury exposure of south caspian sea communities with a diet rich in fish. uncertainties about exposure levels that could have damaging consequences for nervous system development of infants makes bio...

Journal: :زیست شناسی جانوری تجربی 0
کبری ایاسه دانشجوی کارشناسی ارشد محیط زیست، دانشکده منابع طبیعی و کویرشناسی رسول زمانی احمد محمودی استادیار گروه شیلات و محیط زیست، دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد فاطمه شهبازی دانشجوی کارشناسی ارشد محیط زیست، دانشکده منابع طبیعی و کویرشناسی، دانشگاه یزد حمید سودائی زاده استاد یار گروه مدیریت مناطق خشک و بیابانی، دانشکده منابع طبیعی و کویر شناسی، دانشگاه یزد

abstract studies have shown that birds due to being in the high trophic levels on the ecosystems, and also high sensitivity to toxic substances are a useful indicator for the evaluation of mercury pollution. the objective of the present study was to evaluate mercury level in the feathers of turdus philomelos and turdus merula in khanikan forests as an indicator of mercury contamination. to atta...

Journal: :تحقیقات دامپزشکی 0
جمیله سالار آملی بخش سم شناسی گروه علوم پایه دانشکده دامپزشکی دانشگاه تهران طاهره علی اصفهانی بخش سم شناسی گروه علوم پایه دانشکده دامپزشکی دانشگاه تهران

on the basis of the some studies recently published on the concentration of potentially dangerous levels of mercury, a global pollutant and highly toxic element in sea fish and specially tuna fish, this work has been carried out to determine the concentration of mercury in canned tuna fish, that compose a large majority of the fish most people eat. for this reason, 30 cans, produced by differen...

Journal: :علوم و تکنولوژی محیط زیست 0
قاسم ذوالفقاری عباس اسماعیلی ساری سید محمود قاسمپوری سقراط فقیه زاده

the purpose of this study was to evaluate the exposure to mercury (hg), and to examine the various parameters, which contribute to high levels of mercury of iranian dentists in tehran. one-hundred hair samples were collected from dentists. in addition, fifty samples from a control group were taken for comparison. the survey included a structured questionnaire designed to provide information abo...

Journal: :Archives of environmental contamination and toxicology 1998
K Kannan R G Smith R F Lee H L Windom P T Heitmuller J M Macauley J K Summers

Concentrations of total mercury and methyl mercury were determined in sediment and fish collected from estuarine waters of Florida to understand their distribution and partitioning. Total mercury concentrations in sediments ranged from 1 to 219 ng/g dry wt. Methyl mercury accounted for, on average, 0.77% of total mercury in sediment. Methyl mercury concentrations were not correlated with total ...

Background and Aim: Amalgam is used in dentistry cautiously, due to the toxicity of mercury in dental amalgam. Dentists are exposed to mercury vapor in their routine occupational practice, which can be harmful to their health. The aim of the present study was to measure urinary mercury concentrations in general dentists and restorative specialists in Mashhad in 2010. Materials and Methods: This...

اسماعیلی ساری, عباس , بهرامی‌فر, نادر , علی‌دوست, شهره ,

Background and purpose: Mercury contamination is still a threat to the environmental and public health in both developed and developing countries. The aim of this study was to determine the total and organic mercury content in the muscle of goldfish (Carassius aurathus gibelio) obtained from the east and west of Anzali Wetland. We also assessed the health risks involved in consumption of this f...

2012
Jung-Duck Park Wei Zheng

Mercury is a toxic and non-essential metal in the human body. Mercury is ubiquitously distributed in the environment, present in natural products, and exists extensively in items encountered in daily life. There are three forms of mercury, i.e., elemental (or metallic) mercury, inorganic mercury compounds, and organic mercury compounds. This review examines the toxicity of elemental mercury and...

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