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:


(Date:4/5/2017)... SEATTLE , April 5, 2017  The Allen ... the Allen Cell Explorer: a one-of-a-kind portal and dynamic ... large-scale 3D imaging data, the first application of deep ... edited human stem cell lines and a growing suite ... the platform for these and future publicly available resources ...
(Date:3/30/2017)... -- On April 6-7, 2017, Sequencing.com will host the world,s ... at Microsoft,s headquarters in Redmond, Washington ... health and wellness apps that provide a unique, personalized ... is the first hackathon for personal genomics and the ... the genomics, tech and health industries are sending teams ...
(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
Breaking Biology News(10 mins):
(Date:5/15/2017)... ... 2017 , ... Tunnell Consulting announced that Julia O’Neill, principal and ... Specifications in Process Validation,” at the Process Validation Summit 2017, May 18 and ... from the pharmaceutical and biotech industries to explore processes, strategies and new approaches to ...
(Date:5/15/2017)... ... May 15, 2017 , ... Continuing to ... skincare brand has today launched its first-ever cross-medium campaign, #StandFirm, with high-visibility social ... digital and social media channels, emphasizing Algenist’s stance on individuality and disruption: ...
(Date:5/12/2017)...  Eli Lilly and Company (NYSE: LLY ... for the prevention of episodic and chronic migraine, ... studies (EVOLVE-1, EVOLVE-2 and REGAIN) demonstrating statistically significant ... days compared to placebo at both studied doses. ... three studies bring us one step closer to ...
(Date:5/11/2017)... ... 11, 2017 , ... Neurons derived from human pluripotent stem ... and drug screening. Human PSCs derived neural stem cells (NSCs) can be expanded ... often contain mixed population of both differentiated neurons and undifferentiated NSCs. , ...
Breaking Biology Technology:
Cached News: