نتایج جستجو برای: eavy metals

تعداد نتایج: 63798  

Journal: :Neuro endocrinology letters 2006
Joris Muris Albert J Feilzer

In dentistry, a variety of potentially allergenic metals are used, such as mercury, palladium, nickel, gold, chromium, cobalt and other metals. This paper describes a diagnostic approach from a dentist's point of view, which enables analysis of metals in a patient's oral cavity. If metal allergy is suspected, a micro analysis can be used to determine which metals are present in the restorations...

Journal: :EXS 2010
Daniel E Rusyniak Anna Arroyo Jennifer Acciani Blake Froberg Louise Kao Brent Furbee

Of the known elements, nearly 80% are either metals or metalloids. The highly reactive nature of most metals result in their forming complexes with other compounds such oxygen, sulfide and chloride. Although this reactivity is the primary means by which they are toxic, many metals, in trace amounts, are vital to normal physiological processes; examples include iron in oxygen transport, manganes...

Journal: :Archives of environmental contamination and toxicology 2009
Chelsea Ward Sayed Hassan Mary Mendonça

Accumulation and depuration of metals by an organism are underrepresented in the literature. We collected southern toads (Bufo terrestris) from coal by-product (ash)-contaminated and uncontaminated sites to examine metal concentrations over time. Toads were placed in four exposure regimes, then sacrificed periodically over a 5-month period, and whole-body metal levels were measured. Toads expos...

Journal: :Industrial health 2009
Kaoru Suzuki Shinji Koizumi

The transfection assay is an important tool for evaluating the health effects of industrial chemicals, with the reporter gene expression as an indicator. However, heavy metals often influence the expression of the reference plasmids used to correct variations in transfection efficiency between assay plates, reducing the reliability of this assay. We found that the target of heavy metals is the ...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2008
Rosi Ketrin Katarina Toshio Takayanagi Koji Oshita Mitsuko Oshima Shoji Motomizu

A sample-pretreatment method using a chitosan-based chelating resin, ethylenediamine-N,N,N'-triacetate-type chitosan (EDTriA-type chitosan), was developed for the preconcentration of trace metals in seawater and separation of the seawater matrix prior to their determination by inductively coupled plasma-mass spectrometry (ICP-MS). The resin showed very good adsorption for transition metals and ...

Journal: :galen medical journal 0
akram ranjbar department of toxicology and pharmacology, school of pharmacy, hamadan university ‎of medical sciences, hamadan hassan ghasemi student research committiee, hamadan university of medical sciences, hamadan farshad rostampour‎ student research committiee, hamadan university of medical sciences, hamadan

metals can cause oxidative stress by increasing the formation of reactive oxygen species (ros), which make antioxidants incapable of defiance against growing amounts of free radicals. metal toxicity is related to their oxidative state and reactivity with other compounds. however, several reports about metals have been published in the recent years. mitochondria, as a site of cellular oxygen con...

Journal: :international journal of environmental research 2011
l. mhadhbi a. palanca t. gharred m. boumaiza

ría and coastal zone are, in particular, vulnerable to heavy metals pollution. concentrations of 10 metals in liver, muscle and kidney of the sole (solea vulgaris) from ría of vigo and its coastal zone (spain) were measured from april 2006 to february 2007 and the relationships between fish size age and metal concentrations in the tissues was investigated. concentrations of the heavy metals in...

Journal: :international journal of environmental research 0
l. mhadhbi ecimat (estación de ciencias mariñas de toralla), vigo university, 36310 vigo,spain a. palanca animal anatomy laboratory, vigo university, 36310 vigo, spain t. gharred marine biotechnological institute of monastir,tunisia m. boumaiza hidrobiology unit, enironmental biomonitoring laboratory, faculty of sciences bizerte, tunisia

ría and coastal zone are, in particular, vulnerable to heavy metals pollution. concentrations of 10 metals in liver, muscle and kidney of the sole (solea vulgaris) from ría of vigo and its coastal zone (spain) were measured from april 2006 to february 2007 and the relationships between fish size age and metal concentrations in the tissues was investigated. concentrations of the heavy metals in ...

Journal: :Environmental Health Perspectives 1999
B E Fisher

Metals continually rank at the top of the U.S. Environmental Protection Agency's annual list of agents that pose the greatest hazard to the people of the United States. Metals aren't going away, either. They do not biodegrade, and they often concentrate in human and animal cells and tissue. Many metals are known human and animal carcinogens, while many others are suspected to play a role in can...

Journal: :Bulletin of the Japan Institute of Metals 1987

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