News tagged with gold
A Canadian high school student has improved an ineffective experimental cancer therapy with a simple tweak—pairing it with antibiotics—earning accolades Tuesday from a panel of eminent scientists.
Cancer Apr 09, 2013 | 5 / 5 (2) | 0
Nigeria has provided nearly $3 million in long-delayed financing to clean up part of an area where lead poisoning has killed hundreds of children, Doctors Without Borders said Thursday.
Health Jan 31, 2013 | not rated yet | 0
(AP)—A third person has died from eating toxic mushrooms at a California senior care facility.
Health Nov 21, 2012 | 5 / 5 (1) | 0
Doctors Without Borders (MSF) on Thursday urged Nigeria to release funds promised to clean up an area where lead poison killed hundreds of children, warning that further delays could be "disastrous."
Health Nov 15, 2012 | not rated yet | 0
One in six men will be diagnosed with prostate cancer during his lifetime, the second leading cause of death among men in the United States.
Cancer Apr 25, 2012 | not rated yet | 0 |
South Africa on Saturday launched a plan to diagnose tuberculosis in the country's gold mines, where the disease's incidence is the highest in the world.
Diseases, Conditions, Syndromes Mar 24, 2012 | 5 / 5 (1) | 0
The American University in Cairo said Wednesday that a team of its researchers has designed a faster and cheaper test for all types of hepatitis C, which it says affects about 10 million Egyptians.
Diseases, Conditions, Syndromes Mar 14, 2012 | not rated yet | 0
Researchers at Polytechnique Montreal have succeeded in changing the genetic material of cancer cells using a brand-new transfection method. This major breakthrough in nanosurgery opens the door to new medical applications, ...
Surgery Feb 16, 2012 | 5 / 5 (3) | 0
A lead poisoning epidemic in Nigeria's north that has killed 400 children and affected thousands is the worst in modern history, but cleanup has not even begun in many areas, Human Rights Watch said Tuesday.
Health Feb 07, 2012 | not rated yet | 0
(Medical Xpress) -- Adding gold kiwifruit to your diet may lead to less suffering from symptoms of common illnesses such as colds, research suggests.
Health Jan 04, 2012 | 5 / 5 (1) | 0
Illegal gold mining has left at least 2,000 children with lead poisoning in several northern Nigerian villages, where 400 children have already died from contamination, an official said Friday.
Health Oct 28, 2011 | not rated yet | 0
(AP) -- Scientists are warning officials negotiating a global treaty on mercury that banning the deadly chemical completely would be dangerous for public health because of the chemical's use in vaccines.
Health Oct 21, 2011 | not rated yet | 12
Arriving at a rapid and accurate diagnosis is critical during flu outbreaks, but until now, physicians and public health officials have had to choose between a highly accurate yet time-consuming test or a rapid but error-prone ...
Medical research Aug 04, 2011 | 5 / 5 (3) | 0 |
Gold (pronounced /ˈɡoʊld/) is a chemical element with the symbol Au (Latin: aurum) and an atomic number of 79. It has been a highly sought-after precious metal in jewelry, in sculpture, and for ornamentation since the beginning of recorded history. The metal occurs as nuggets or grains in rocks, in veins and in alluvial deposits. Gold is dense, soft, shiny and the most malleable and ductile pure metal known. Pure gold has a bright yellow color and luster traditionally considered attractive, which it maintains without oxidizing in air or water. It is one of the coinage metals and formed the basis for the gold standard used before the collapse of the Bretton Woods system in 1971.
At the end of 2006, it was estimated that all the gold ever mined totaled 158,000 tonnes. This can be represented by a cube with an edge length of just 20.2 meters. Modern industrial uses include dentistry and electronics, where gold has traditionally found use because of its good resistance to oxidative corrosion and excellent quality as a conductor of electricity. Chemically, gold is a transition metal and can form trivalent and univalent cations upon solvation. At STP it is attacked by aqua regia (a mixture of acids), forming chloroauric acid and by alkaline solutions of cyanide but not by single acids such as hydrochloric, nitric or sulfuric acids. Gold dissolves in mercury, forming amalgam alloys, but does not react with it. Since gold is insoluble in nitric acid which will dissolve silver and base metals, this is exploited as the basis of the gold refining technique known as "inquartation and parting". Nitric acid has long been used to confirm the presence of gold in items, and this is the origin of the colloquial term "acid test", referring to a gold standard test for genuine value.
For more information about Gold, read the full article at
This text uses material from Wikipedia and is available under the GNU Free Documentation License.