Navigation Links
Bacterium helps formation of gold
Date:10/7/2009

Australian scientists have found that the bacterium Cupriavidus metallidurans catalyses the biomineralisation of gold by transforming toxic gold compounds to their metallic form using active cellular mechanism.

Researchers reported the presence of bacteria on gold surfaces but have never clearly elucidated their role. Now, an international team of scientists has found that there may be a biological reason for the presence of these bacteria on gold grain surfaces. "A number of years ago we discovered that the metal-resistant bacterium Cupriavidus metallidurans occurred on gold grains from two sites in Australia. The sites are 3500 km apart, in southern New South Wales and northern Queensland, so when we found the same organism on grains from both sites we thought we were onto something. It made us wonder why these organisms live in this particular environment. The results of this study point to their involvement in the active detoxification of gold complexes leading to formation of gold biominerals", explains Frank Reith, leader of the research and working at the University of Adelaide (Australia).

The experiments showed that C. metallidurans rapidly accumulates toxic gold complexes from a solution prepared in the lab. This process promotes gold toxicity, which pushes the bacterium to induce oxidative stress and metal resistance clusters as well as an as yet uncharacterized gold-specific gene cluster in order to defend its cellular integrity. This leads to active biochemically-mediated reduction of gold complexes to nano-particulate, metallic gold, which may contribute to the growth of gold nuggets.

For this study scientists combined synchrotron techniques at the European Synchrotron Radiation Facility (ESRF) and the Advanced Photon Source (APS) and molecular microbial techniques to understand the biomineralisation in bacteria. It is the first time that these techniques have been used in the same study, so Frank
'/>"/>

Contact: Montserrat Capellas
capellas@esrf.fr
33-476-882-663
European Synchrotron Radiation Facility
Source:Eurekalert  

Page: 1 2

Related biology news :

1. UTSA biology researchers demystify elusive war zone bacterium
2. Scientists sequence genome of the N2-fixing, soil-living bacterium Azotobacter vinelandii
3. TB bacterium uses its sugar coat to sweeten its chances of living in lungs
4. Cyanobacterium sequenced features rare linear chromosome
5. UCR graduate student discovers, names bacterium linked to psyllid yellows
6. Single-celled bacterium works 24-7
7. Researchers decode genetics of rare photosynthetic bacterium
8. Bacterium sequenced makes rare form of chlorophyll
9. Kent State University Professor C. Owen Lovejoy helps unveil oldest hominid skeleton
10. MSU scientist helps map potato genome, hope to improve crop yield
11. Forest Service Web-based tool helps manage environmental risk
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Bacterium helps formation of gold
(Date:5/19/2015)... May 19, 2015 ... the addition of the  "Genetic Testing Market ... (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ,A recent report, Genetic ... analysis of the current and future genetic ... tests, their working principles and types are ...
(Date:5/11/2015)... , May 11, 2015  Through a well-rounded UAS delegation ... had a strong showing at AUVSI,s Unmanned 2015 conference ... of Ohio,s UAS industry met with ... from all points along the UAS ecosystem. ... (DDC) Vice President for Aerospace Rich Knoll . "If ...
(Date:5/6/2015)... May 6, 2015 LifeBEAM, a developer of ... producer, announced today that they will expand their partnership ... first bio-sensing cycling helmet and the first joint project ... new colors in order to give cyclists more style ... addition, LifeBEAM and Lazer announced their plan to release ...
Breaking Biology News(10 mins):Global Genetic Testing Market Outlook 2018 2Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 2LifeBEAM and Lazer Announce Expanded Partnership in Bio-Sensing Sports Gear 3
... Who of bats, bears, beaked whales and all of Earth,s ... a Field Museum scientific team with access to one of ... team headed by the IUCN (International Union for Conservation of ... including assessments of diversity, threat and knowledge of the creatures. ...
... MADISON, WI, October 1, 2008 - As a nutrient, ... and potassium, but a new book explains its crucial ... agricultural professionals, understanding how plants use sulfur is essential ... A Missing Link Between Soils, Crops and Nutrition , ...
... What: To stop cancer before it has a ... turning their attention to new discoveries in cancer prevention. ... share the latest research in this expanding and promising ... reduce cancer incidence and mortality. To help you ...
Cached Biology News:Field Museum provides gold standard for mammal survey 2Field Museum provides gold standard for mammal survey 3
(Date:5/21/2015)... W. R. Grace & Co. ... Worms, Germany has received good manufacturing practice (GMP) ... International Pharmaceutical Excipient Council (IPEC) Foundation. ... SYLOID® FP brand of pharmaceutical grade excipient silica ... Curtis Bay, Maryland (USA) and Sorocaba, Brazil locations. ...
(Date:5/21/2015)... 2015  CytRx Corporation (NASDAQ: CYTR ), ... oncology, today announced positive updated results from its ... the treatment of unresectable glioblastoma multiforme (GBM), a ... trial is designed to investigate the preliminary efficacy ... have progressed following prior treatment with surgery, radiation ...
(Date:5/21/2015)... Research and Markets ( http://www.researchandmarkets.com/research/84975r/2015_global ... "2015 Global Survey on Flow Cytometry Adoption Trends" ... primary goal of this research is to analyze ... Key information the survey seeks to collect include ... predominantly used applications for flow cytometers, respondents, most ...
(Date:5/21/2015)... Kingston, Ontario (PRWEB) May 21, 2015 ... entered into an exclusive North American distribution agreement ... microbiology testing system. , With more than 160 ... of products and services for laboratory and production ... choice, operational excellence and differentiated services to enable ...
Breaking Biology Technology:Grace European Facility Receives GMP Excipient Certification for SYLOID® FP Silica Gel 2CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 2CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 3CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 4CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 5CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 6CytRx Reports Positive Updated Phase 2 Aldoxorubicin Clinical Trial Results in Glioblastoma Multiforme (Brain Cancer) 7Global Survey on Flow Cytometry Adoption Trends 2015 2Veolia’s TECTA™ B16 Instrument for E. Coli Detection is Offered Exclusively Through VWR 2
... ... engineering consulting firm Full Spectrum Software announces key hire. Cindy Larkin has been ... and software experience to her new role. , ... Southborough, MA (Vocus) November 3, 2009 -- Leading medical ...
... RIVER, N.J., Nov. 2 PDI, Inc. (Nasdaq: ... support to U.S. health care companies, and Physicians Interactive, ... and marketing services to life sciences companies, have entered ... first integrated network of digital sales and marketing solutions. ...
... 2 The World Egg Bank ... to infertile women, announced a first-of-its-kind partnership with a European ... fertilization (IVF) of donated frozen eggs at or less ... The exclusive partnership is between TWEB and IVI in Alicante, ...
Cached Biology Technology:Medical Device Software Engineering Firm Full Spectrum Software Appoints Cindy Larkin to Director of Client Services 2PDI and Physicians Interactive Partner To Provide Integrated, Personal and Digital Solutions to Life Sciences Companies 2PDI and Physicians Interactive Partner To Provide Integrated, Personal and Digital Solutions to Life Sciences Companies 3World Egg Bank Launches Medical Tourism Program With World's Largest Egg-Donation Fertility Clinic 2
... pathway studies, protein-protein interaction studies, and ... on the flexible and powerful Paraflo ... are available as part of our ... Custom Probe Content Probe ...
... Arrays are intended for laboratory research use ... in neutral buffered formalin and embedded in ... performed by certified pathologists. Tissue cores ... relocated into a new recipient paraffin block, ...
... Mega Western Protein Array was developed using ... Protein Arrays are manufactured using high quality ... A protein sample from each of 30 ... Protein molecular weight marker on a large ...
... Using the New FAST(tm) Frame Multi-Slide Plate! ... designed to hold four, 16-pad FAST Slides ... a microplate footprint for high throughput processing ... standards recommended by the Society of Biomolecular ...
Biology Products: