نتایج جستجو برای: metals

تعداد نتایج: 63791  

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

Journal: :international journal of environmental research 2013
a.r. karbassi s.s. bassam m. ardestani

during estuarine mixing of fresh water with saline water and due to the flocculation process, aportion of dissolved metals come into particulate phase, and the dissolved load decreases. this process plays an important role in self-purification of heavy metals in rivers. in this study, flocculation of cu, mn, ni, pb and zn during mixing of cheshme-kileh river water with caspian sea water has bee...

Journal: :journal of research in health sciences 0
abdolmotaleb seid-mohammadi ghodratollah roshanaei ghorban asgari

background: this study was conducted to estimate the level of heavy metals accumulate in vegetables irrigated with contaminated water compared with those irrigated with fresh water in hamadan, west of iran in 2012. methods: sixty samples of different vegetables i.e., parsley, tarragon, sweat basil and leek irrigated with contaminated water and thirty six samples from three different adjacent ar...

1998
A. J. FRANCIS

Contamination of soils, water, and sediments by radionuclides and toxic metals from uranium mill tailings, nuclear fuel manufacturing and nuclear weapons production is a major concern. Studies of the mechanisms of biotransformation of uranium and toxic metals under various microbial process conditions has resulted in the development of two treatment processes: (i) stabilization of uranium and t...

2010
Roumiana S. Petrova

BORON INDUCED SURFACE MODIFICATION OF TRANSITION METALS by Raghasudha Vangaveti Boronizing is a thermo-chemical surface treatment of metals in which boron atoms diffuse into the metal substrate and form hard metallic borides. As a result of boronizing, several properties such as hardness, wear resistance, corrosion resistance, and high temperature oxidation resistance improve which make the met...

2016
Ioan Stelian Bocşan Irina Brumboiu Tudor Călinici Mariana Vlad Cecilia Roman Ioana Brie Mihaela Lucia Ponta

Introduction The potential oncogenic effect of some heavy metals in people occupationally and non-occupationally exposed to such heavy metals is already well demonstrated. This study seeks to clarify the potential role of these heavy metals in the living environment, in this case in non-occupational multifactorial aetiology of malignancies in the inhabitants of areas with increased prevalent en...

2015
Zohreh Ghaemi Abdolreza Karbassi Faramarz Moattar Amirhesam Hassani Nematollah Khorasani

BACKGROUND Being established in 1988 in the vicinity of Isfahan city, Mubarakeh Steel complex has imposed adverse environmental and health effects within the area. The study area is covered by lots of farms through which major crops like wheat and rice are provided. METHODS Considering the imposed pollution load of the complex, the current study has monitored the concentration of metals Fe, A...

Journal: :Toxicological sciences : an official journal of the Society of Toxicology 2005
Hesham M Korashy Ayman O S El-Kadi

We recently demonstrated that heavy metals, Hg2+, Pb2+, and Cu2+ induced Cyp1a1 gene expression, yet the mechanisms involved remain unknown. To explore the molecular mechanisms involved in the modulation of Cyp1a1 by heavy metals, Hepa 1c1c7 cells were treated with the metals in the presence and absence of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), a potent Cyp1a1 inducer. Time-dependent effec...

2012

Printed circuit boards (PCBs) are currently being dumped in landfills or incinerated which is causing a serious environmental harm in the form of toxic gases or leached hazardous compounds. PCBs contain high amounts of precious metals; about 20 wt% copper, 0.04 wt% gold, 0.15 wt% silver, and 0.01 wt% palladium. The extraction of these metals from PCBs is both profitable and environmentally wort...

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