نتایج جستجو برای: mercury

تعداد نتایج: 41855  

2015
lindsay J. Brooks

Mercury is a persistent, toxic heavy metal that can bioaccumulate in organisms, causing diseases and other health problems. Wilson’s snipe (Gallinago delicata) feed primarily on aquatic invertebrates, which makes them prone to mercury bioaccumulation. In this study, we measured total mercury in Wilson’s snipe. Total mercury was measured in the feathers and muscle tissue. Mean concentration (ppm...

Gh Mortazavi, M Haghani N Rastegarian S Zarei SMJ Mortazavi,

According to the World Health Organization (WHO), factors such as growing electricity demand, ever-advancing technologies and changes in social behaviour have led to steadily increasing exposure to man-made electromagnetic fields.  Dental amalgam fillings are among the major sources of exposure to elemental mercury vapour in the general population. Although it was previously believed that low ...

Journal: :دامپزشکی 0
لیلا طاهری آزاد کارشناس ارشد محیط زیست، دانشگاه تربیت مدرس عباس اسماعیلی ساری استاد گروه محیط زیست، دانشکده منابع طبیعی و علوم دریایی، دانشگاه تربیت مدرس کامران رضائی توابع کارشناس ارشد شیلات، مرکز تحقیقات بین المللی همزیستی با کویر دانشگاه تهران

the main objective of the present study is investigation of mercury bioaccumulation relation to length, weight, age and sex factors at liver of zander fish. for this purpose, in winter 2005 at western caspian sea shores (from jefroud fishery station to anzali wetland) 21 numbers zander fish were obtained and then after biometry (measuring length, age and weight) and sex determination, the mercu...

Abbas Esmaili-Sari, Alireza Riyahi-Bakhtiyari, Jaber Aazami, Mahboubeh Nozari,

Background: Mercury (Hg) is a major environmental contaminant due to its global ubiquity, tendency to bioaccumulate, and toxicity in wildlife. Mercury accumulation in wetlands threatens critical breeding and foraging habitats of many fish and wildlife species. In this study, mercury concentrations were detected in different tissues of pike. Methods: To achieve these purposes, 58 pikes (Esox l...

Journal: :journal of dentistry, tehran university of medical sciences 0
m. azarsina dds, post graduate student, department of operative dentistry, faculty of dentistry, hamadan univers sh. kasraei dds, ms, associate professor, dental research center, department of operative dentistry, faculty of t. masoum dds, ms, assistant professor, department of pediatric dentistry, faculty of dentistry, hamadan unive z. khamverdi dds, ms, associate professor, dental research center, department of operative dentistry, faculty of

objectives: this study evaluated the effect of surface polishing on mercury release from dental amalgam after treatment with 16% carbamide peroxide gel. materials and methods: ninety-six samples from two different amalgam brands were prepared in truncated cone-shaped pvc polymer molds with an external surface area of 195 mm². half of the specimens were polished with green and red rubber, a brus...

Journal: :international journal of environmental research 2014
m. ghadaksaz zadeh m.s. sekhavatjou a. hosseini alhashemi a. taghinia hejabi

mercury is a dangerous and an extremely toxic element, which can transfer to the food chain.presence of this element in the atmosphere particularly during the rainy seasons cause soil and environmental pollution, therefore this research will evaluate the transformation of mercury vapor from the atmosphere through precipitation into the soil. in the present study, mercury concentrations were det...

Journal: :Current problems in pediatric and adolescent health care 2010
Stephan Bose-O'Reilly Kathleen M McCarty Nadine Steckling Beate Lettmeier

Acute or chronic mercury exposure can cause adverse effects during any period of development. Mercury is a highly toxic element; there is no known safe level of exposure. Ideally, neither children nor adults should have any mercury in their bodies because it provides no physiological benefit. Prenatal and postnatal mercury exposures occur frequently in many different ways. Pediatricians, nurses...

2007
Elsie M. Sunderland

BACKGROUND Methylmercury exposure causes a variety of adverse effects on human health. Per capita estimates of mercury exposure are critical for risk assessments and for developing effective risk management strategies. OBJECTIVE This study investigated the impact of natural stochasticity in mercury concentrations among fish and shellfish harvested from the Atlantic Ocean, Pacific Ocean, and f...

2018
Shiqi Lv Bin Yang Yixuan Kou Jun Zeng Ruixiong Wang Yumeng Xiao Fencan Li Ying Lu Yuwen Mu Changming Zhao

This study was conducted to evaluate the effects of mercury stress on growth, photosynthesis and mercury accumulation in different cultivars of a non-food energy crop, Jerusalem artichoke, and to screen appropriate cultivars for their efficacy in the phytoremediation of mercury (Hg2+) contaminated soil. Cultivars LZJ033 (high above-ground biomass and nutrient content, and strongly sexual reprod...

Esmaili Sari, Abbas, Ghasempouri, S.Mahmood, Hasani Tabatabei, Masoomeh, Shayegh, S,Shojaeddin, Zolfaghari, Ghasem,

Effect of Age, Gender, Years of Practice, Specialty and Number of Amalgam restorations on Mercury Concentration in Nails of dentists practicing in Tehran Dr. A. Esmaili Sari* - Gh. Zolfaghari** - S.M. Ghasempouri***- Dr. S.Sh. Shayegh****, Dr. M. Hasani Tabatabei***** * Associate Professor of Environment Dept., Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University ** M.Sc...

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