HOME >> BIOLOGY >> NEWS
'Gold Bug' sheds light on how some gold deposits formed

AMHERST, Mass. - For centuries, scientists have wondered why gold is found in two forms - as a solid in deposits close to the Earth's crust, and in solution, often far removed from gold-ore deposits. A fairly simple lab experiment conducted at the University of Massachusetts may lead to an understanding of how the precious metal came to be available in disparate forms, and how some gold-ore deposits might have been formed.

In research related to pollution clean-up, a team of UMass microbiologists led by noted researcher Derek Lovley has extracted gold solids from water containing dissolved gold. The work uses technology Lovley developed 10 years ago to clean up heavily polluted water and soil around the U.S. using bacteria and archaea, or ancient micro-organisms, to break down heavy metals in affected environments.

Like uranium, cadmium, and other heavy metals, gold is precious and useful to humans. Lovley notes that dissolved gold, however, is useless because it can't be manipulated and formed into objects of value or beauty. He says when either solid or liquid gold is ingested, it is toxic to most life forms. On the other hand, liquid gold and many other heavy metals are not toxic to a group of microbes called extremophiles, or simple life forms known to thrive in environments where others cannot live.

With this in mind, the UMass researchers asked if extremophiles might have ingested the liquid gold found in hydrothermal vents, hot springs, and other hot places, and left it scattered as deposits of solid gold in places that now are below the surface of the Earth. This would explain how the metal came to be in two different forms in very different environments. If that is the case, the team wondered if microbes could duplicate the process in the laboratory and extract valuable solids from liquid containing dissolved gold.

"A vast number of bacteria and archaea have the ability to transfer electrons to iron throug
'"/>

Contact: Paula Hartman Cohen
phcohen@admin.umass.edu
413-545-2987
University of Massachusetts at Amherst
7-Aug-2001


Page: 1 2 3

Related biology news :

1. New fossil sheds light on old mystery
2. Fossil genes reveal how life sheds form and function
3. OHSU-VAMC study sheds light on estrogens benefit for MS
4. Ovarian cancer sheds tumor suppression with loss of estrogen receptor
5. Study sheds new light on genetic risk for Parkinsons disease
6. Equine clonings triple play sheds light on calcium, cell signaling, human disease
7. UCLA study sheds new light on island evolution
8. Research sheds new light on evolution
9. Better model of cancer development sheds light on potential angiogenesis target
10. Media advisory - wildland fire impacts on watersheds
11. Enzyme discovery sheds light on causes of rare disease, cancer

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Gold Bug sheds light how some gold deposits formed

(Date:11/6/2014)... a predator. Except when that predator runs so fast that ... its size, is the fastest creature on Earth. Some of ... (at about five miles per hour). The fastest human can ... from the tiger beetle, a person would have to hit ... a problem. At peak speeds, everything becomes a blur. They ...
(Date:11/5/2014)... Fidel Santamaria, associate professor of biology in the ... researchers in the nation selected to receive a ... Grant for Exploratory Research (EAGER). The funding supports ... support researchers to create new technology that will ... Santamaria, complex behaviors in neuroscience are broken into ...
(Date:11/5/2014)... great diversity in their ability to identify scents and ... in their perceptual evaluation of odors, with women outperforming ... , Sex differences in olfactory detection may play a ... to one,s perception of smell, which is naturally linked ... has been suggested to be cognitive or emotional, rather ...
Breaking Biology News(10 mins):The tiger beetle: Too fast to see 2UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3The female nose always knows: Do women have more olfactory neurons? 2
(Date:11/22/2014)... (PRWEB) November 21, 2014 CannLabs, ... cloud based analytics and scientific testing methodologies relating to ... for a $750,000 line of credit from an existing ... pleased to have secured this commitment from one of ... Officer of CannLabs. “This capital will help accelerate our ...
(Date:11/22/2014)... Respiratory therapy students will soon ... of life-like respiratory ailments using the latest in ... Rapids-based, Michigan Instruments Inc. developers of the world-renowned ... respiratory simulation units to the pro-gram, which cost ... Muskegon Community College are collaborating to offer Muskegon’s ...
(Date:11/21/2014)... , Nov. 21, 2014   TRU-D SmartUVC LLC ... their superbug-killing UVC automated disinfection robot, TRU-D SmartUVC, at FIS ... from Nov. 23 to 26 at Stand 23. ... United Kingdom,s largest infection-related event of ... societies to one of the leading events of its type ...
(Date:11/21/2014)... November 20, 2014 The ... policy research organization representing leading California academic institutions, ... PwC US today released a report ... sciences industry growth. The trend shows a 4 ... 2015 California Biomedical Industry Report indicates that, ...
Breaking Biology Technology:CannLabs Secures $750,000 Line Of Credit 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 2Michigan Instruments Donates Two Respiratory Simulation Training and Test Lung (TTL) Devices to Grand Valley State University 3TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 2TRU-D SmartUVC to Showcase Superbug-Killing Robot at FIS 2014 3California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 2California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 3California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 4
Cached News: