نتایج جستجو برای: toxic of mercury
تعداد نتایج: 21170844 فیلتر نتایج به سال:
Background and Aim: Mercury or Hydrargyrum (Hg) is the most non-radioactive toxic element known. Dental amalgam is made up of 50% mercury.. Electromagnetic fields may increase the emission of mercury from dental amalgam fillings. It was thus aimed to study the effects of electromagnetic fields of mobile use on the level of mercury released from dental amalgam restorations. Materials and Methods...
The potential danger of natural mercury accumulation in the diet of the Eskimo is evaluated through mercury levels determined in cord blood, placenta, maternal blood, hair, and milk of 38 maternal-infant pairs from Anchorage and the Yukon-Kuskokwim Delta. Although mercury levels are not discernably dangerous, trends to larger accumulations in maternal and fetal RBC and placental tissue with pro...
Towards Mechanistic Understanding of Mercury Availability and Toxicity to Aquatic Primary Producers.
The present article reviews current knowledge and recent progress on the bioavailability and toxicity of mercury to aquatic primary producers. Mercury is a ubiquitous toxic trace element of global concern. At the base of the food web, primary producers are central for mercury incorporation into the food web. Here, the emphasis is on key, but still poorly understood, processes governing the inte...
Mercury exposure is the second-most common cause of toxic metal poisoning. Public health concern over mercury exposure, due to contamination of fish with methylmercury and the elemental mercury content of dental amalgams, has long been a topic of political and medical debate. Although the toxicology of mercury is complex, there is evidence for antioxidant protection in the prevention of neurolo...
Background: The clinical manifestations of mercury poisoning vary based on chemical form, dose, and route of administration. In the medical field, many of the cases of mercury exposure have been in mining agriculture, or chemical industrial workers via inhalation. Aim: To discuss the diagnosis of parenteral mercury poisoning with radiographic identification and potential sequelae. Case Presenta...
Background: Although it is one of the most toxic nonradioactive elements, mercury is widely used in dental amalgam. Mercury is a toxic element which can damage various organs such as central nervous system, renal, respiratory and hematologic systems. The adverse health impacts associated to exposure to some common sources of electromagnetic fields including laptop computers, mobile phones, ...
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...
Mercury at low concentrations represents a major hazard to microorganisms. Inorganic mercury has been reported to produce harmful effects at 5 microg/l in a culture medium. Organomercury compounds can exert the same effect at concentrations 10 times lower than this. The organic forms of mercury are generally more toxic to aquatic organisms and birds than the inorganic forms. Aquatic plants are ...
The variations in size and spatial and temporal variations in concentrations of toxic metals (cadmium, mercury, and lead) in oyster tissues were studied. Samples were collected at monthly intervals over a 1-year period from three locations along the southern coast of Oman (Mirbat, Hadbeen, and Sadah). Cadmium and lead were analyzed using an inductively coupled plasma atomic emission spectromete...
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