Arsenic
hideArsenic (pronounced /ˈɑrsnɪk/; also /ɑrˈsɛnɪk/ when attributive) is the chemical element that has the symbol As and atomic number 33. Arsenic was first documented by Albertus Magnus in 1250. Its atomic mass is 74.92. Arsenic is a notoriously poisonous metalloid with many allotropic forms, including a yellow (molecular non-metallic) and several black and grey forms (metalloids). Three metalloidal forms of arsenic, each with a different crystal structure, are found free in nature (the minerals arsenic sensu stricto and the much rarer arsenolamprite and pararsenolamprite). However, it is more commonly found as arsenide and in arsenate compounds, several hundred of which are known. Arsenic and its compounds are used as pesticides, herbicides, insecticides and in various alloys.
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News tagged with arsenic
Scientists pinpoint origin of dissolved arsenic in Bangladesh drinking water
Nov 15, 2009 |
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Researchers in MIT's Department of Civil and Environmental Engineering believe they have pinpointed a pathway by which arsenic may be contaminating the drinking water in Bangladesh, a phenomenon that has puzzled ...
Fast, easy, and highly sensitive arsenic detection with gold nanoparticles
Nanotechnology / Nanomaterials
Nov 25, 2009 |
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(PhysOrg.com) -- Mention of arsenic poisoning usually brings to mind underhanded murder. However, the danger of arsenic poisoning from contaminated drinking water is far greater. Low concentrations of arsenic are found in ...
Scientists link influenza A (H1N1) susceptibility to common levels of arsenic exposure
May 20, 2009 |
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The ability to mount an immune response to influenza A (H1N1) infection is significantly compromised by a low level of arsenic exposure that commonly occurs through drinking contaminated well water, scientists ...
Scientists find new solutions for the arsenic-poisoning crisis in Asia
Mar 24, 2009 |
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(PhysOrg.com) -- Every day, more than 140 million people in southern Asia drink groundwater contaminated with arsenic. Thousands of people in Bangladesh, Cambodia, India, Myanmar and Vietnam die of cancer each year from chronic ...
Team finds Yellowstone alga that detoxifies arsenic
Mar 09, 2009 |
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Arsenic may be tough, but scientists have found a Yellowstone National Park alga that's tougher.
Living sensor can warn of arsenic pollution
Biology /
Sep 08, 2008 |
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Scientists studying arsenic pollution have discovered a living sensor that can spot contamination. They have also discovered new bacteria that can clean up arsenic spills even in previously untreatable cold areas, microbiologists ...
Arsenic exposure could increase diabetes risk
Aug 19, 2008 |
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Inorganic arsenic, commonly found in ground water in certain areas, may increase the risk of developing type 2 diabetes, according to a study by researchers at the Johns Hopkins Bloomberg School of Public Health. The study ...
Searching for Alien Life, on Earth
Oct 05, 2009 |
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If you spend an afternoon walking along the muddy shore of Mono Lake, with the eastern flank of the Sierra Nevada mountains looming majestically in the background, you’ll no doubt discover, as others have ...
People vary widely in ability to eliminate arsenic from the body
Aug 26, 2009 |
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Large variations exist in peoples' ability to eliminate arsenic from the body, according to a new study that questions existing standards for evaluating the human health risks from the potentially toxic substance. ...
Targeted Nanoparticles Boost Arsenic’s Anticancer Punch
Nanotechnology / Bio & Medicine
Jul 22, 2009 |
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Arsenic trioxide has a long history as a potent human poison, but it also has proven valuable as one of the primary treatment options for acute promyelocytic leukemia. Efforts to use arsenic trioxide to treat other types ...
First 'nanorust' field test slated in Mexico
Nanotechnology / Bio & Medicine
May 27, 2009 |
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Rice University researchers today announced that the first field tests of "nanorust," the university's revolutionary, low-cost technology for removing arsenic from drinking water, will begin later this year ...
Arsenic and Old Toenails: New research highlights environmental exposure to toxin
Feb 23, 2009 |
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(PhysOrg.com) -- Scientists from Leicester and Nottingham have devised a method for identifying levels of exposure to environmental arsenic - by testing toenail clippings.
Arsenic linked to cardiovascular disease at EPA-regulated drinking water standards
Nov 13, 2008 |
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When mice are exposed to arsenic at federally-approved levels for drinking water, pores in liver blood vessels close, potentially leading to cardiovascular disease, say University of Pittsburgh researchers in the Dec. 1 issue ...
Arsenic biomethylation required for oxidative DNA damage
Nov 23, 2009 |
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Biomethylation of arsenic compounds appears to cause oxidative DNA damage and to increase their carcinogenicity, according to a new study published online November 23 in the Journal of the National Cancer Institute.
Geologists studying groundwater arsenic levels in India empower Bengali women, children
Oct 22, 2009 |
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A Kansas State University geologist and graduate student are finding that the most important tools in their fieldwork on groundwater arsenic pollution are women and children armed with pamphlets and testing kits.
