Navigation Links
Particle size matters to bacteria ability to immobilize heavy metals

One of the most common bacteria in the Earth, Shewanella oneidensis MR-1, uses oxygen as an energy source for respiration. But in the absence of oxygen, Shewanella uses (oxy)hydroxide minerals. These metal particles may also have adsorbed heavy metals on them. As a result, Shewanella influence the mobility and bioavailability of iron and environmental contaminants like lead, cobalt, and arsenic.

Ph.D. student Saumyaditya Bose and Professor Michael Hochella Jr., both in geosciences in the College of Science at Virginia Tech, and their research colleagues at Pacific Northwest National Laboratory (PNNL), are looking at how the size of iron oxide nano particles influences the bacteria's ability to breathe. This is the first study by any group that couples environmental microbiology and nano-mineralogy.

"This adds to our understanding of how nanoparticles might influence the environment and contaminant metal mobility in our rivers, lakes and other surface waters, as well as groundwater," said Bose.

He will present the research at the 232nd National Meeting of the American Chemical Society on September 10-14 in San Francisco.

Using iron oxide nanoparticles (less than 100 nm), which are common and the most used transition metal oxide for bacterial respiration, the researchers are looking at the interfacial reactions between the whole bacterial cell and the particles to determine the influence of mineral size on microbial reduction rates at the nanoscale. The researchers are looking at microbial reduction of nano hematite, which Bose synthesized in the lab and characterized.

"Nano particles of iron oxides are present everywhere and, due to their small size but large surface area, they provide bacteria a large amount of reactive sites," said Bose. "These particles are reduced by biological and non-biological methods. Different metals, including toxic heavy meals, are adsorbed onto these nanoparticles. When the iron oxides precipi
'"/>

Source:Virginia Tech


Page: 1 2 3

Related biology news :

1. Size matters: Preventing large mammal extinction
2. Space matters: Estimating species diversity in the fossil record
3. Bigger brain size matters for intellectual ability
4. UCSB researchers discover shape matters to macrophages
5. Researchers find that bumblebees flower choice matters
6. For Pacific white shrimp, gender matters when competing for food
7. The penalty of having a sister -- why sibling sex matters for male saiga antelopes
8. Anti-bacterial additive widespread in U.S. waterways
9. A bacterial genome reveals new targets to combat infectious disease
10. Discovery of key proteins shape could lead to improved bacterial pneumonia vaccine
11. Scientists discover that host cell lipids facilitate bacterial movement
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Particle size matters bacteria ability immobilize heavy metals

(Date:7/23/2014)... of identical twins has found that early reading skill ... the journal Child Development , was conducted by ... London. , "Since reading is an ability that can ... according to Stuart J. Ritchie, research fellow in psychology ... "Early remediation of reading problems might aid not only ...
(Date:7/23/2014)... fable about the crow and the pitcher, a thirsty bird ... to drink from it, he finds the water level out ... pitcher, the bird drops pebbles into it one at ... him to drink his fill. , Highlighting the value of ... more effective than brute force. It also characterizes crows as ...
(Date:7/23/2014)... Honey bees, especially the young, are highly sensitive to ... to maintain temperatures within a narrow range. Recently published ... Tufts University,s School of Arts and Sciences, is the ... within a hive in process similar to how humans ... and skin. , "This study shows how workers ...
Breaking Biology News(10 mins):Stronger early reading skills predict higher intelligence later 2Smarter than a first-grader? 2Smarter than a first-grader? 3Smarter than a first-grader? 4How honey bees stay cool 2
... and they can sometimes be fatal. Because more ... pre-eminent remedy; antibiotics; the search for new remedies ... by scientists from the Flanders Interuniversity Institute for ... certain mice, by nature, can withstand particular bacterial ...
... following a heart attack does not improve certain cardiac ... increased risk of death, according to a study in ... a widely available dietary supplement and is publicized as ... and sexual dysfunction, according to background information in the ...
... a heart attack does not improve certain cardiac functions ... risk of death, according to a study in the ... widely available dietary supplement and is publicized as having ... sexual dysfunction, according to background information in the article. ...
Cached Biology News:A step forward in the fight against bacterial infections 2Little known DNA repair enzyme may be a tumor suppressor gene 2Use of amino acid supplement following a heart attack provides no benefit, may be harmful 2
(Date:7/23/2014)... MINNEAPOLIS , July 23, 2014 /PRNewswire/ - ... industrial biotechnology company producing sustainable chemicals, today announced that ... in full their option to purchase an additional ... offering price of $12.00 per share, less underwriting ... announced underwritten public offering of 2,800,000 shares of ...
(Date:7/23/2014)... LEXINGTON, Massachusetts , July 23, 2014 /PRNewswire/ ... SHPG ), the global specialty biopharmaceutical ... company, today announced a worldwide licensing and collaboration ... (ERT) for the potential treatment of both the ... patients with Hunter syndrome (MPS II). This collaboration ...
(Date:7/23/2014)... PARK, Calif. , July 23, 2014  Sofinnova ... investment firm, today announced the closing of Sofinnova Venture ... million and in excess of the initial fund target ... helping entrepreneurs build successful biotechnology companies. Consistent with recent ... with promising later stage clinical programs, along with select ...
(Date:7/23/2014)... With the ability to record continuously at ... than 15 minutes, Fastec Imaging has brought the same ease-of-use ... imaging. “Finally, a high speed camera that can be used ... everyday lives.” proclaims Matt Kearney, VP of Sales for Fastec ... demystify and simplify the traditionally complicated workflow of a high ...
Breaking Biology Technology:BioAmber announces exercise in full of underwriters' option in connection with previously priced follow-on offering 2BioAmber announces exercise in full of underwriters' option in connection with previously priced follow-on offering 3Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 2Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 3Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 4Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 5Sofinnova Raises $500 Million Biotech Venture Fund 2Fastec Imaging Introduces the First High Speed Camcorder 2Fastec Imaging Introduces the First High Speed Camcorder 3
... SciQuest, Inc ., a leading provider of ... enablement solutions, was once again named to ... companies in America. SciQuest first appeared on the ... http://photos.prnewswire.com/prnh/20100624/DA25925LOGO ) (Logo: http://www.newscom.com/cgi-bin/prnh/20100624/DA25925LOGO ...
... SAN DIEGO, Aug. 25 TriLink BioTechnologies (TriLink), announced that ... the Ballgame," a series of San Diego Padre games in ... need. The Padre,s Foundation will donate a portion of each ... SAY will give to San Diego families, who might otherwise ...
... open a bag of potato chips or pop in a DVD, ... for the soap. Sputter deposition is an industrial process used ... films onto various backings, like the metallic coating on potato chip ... chips. Mostly, the process works very well. In a vacuum ...
Cached Biology Technology:SciQuest Makes the Inc. 500|5000 List of Fastest-Growing Companies for Fourth Consecutive Year 2TriLink BioTechnologies to Sponsor 'Take Me Out to the Ballgame,' a SAY San Diego Event Benefiting San Diego Families in Need 2Trouble with sputter? Blame giant nanoparticles 2Trouble with sputter? Blame giant nanoparticles 3
SHEEP ANTI ESCHERICHIA COLI...
Recombinant Rat Leptin, CF...
2,4,6-Trinitrophenyl hapten is conjugated to Bovine Gamma Globulin (BGG) through lysine by amide bonds....
... • Holds 0.1 mL - 25 mL pipets ... pipets. Also accommodates most standard square or round pipet ... Has four compartments, each 76 mm W x 76 ... x 11 3/8 ins.). Overall dimensions: 89 mm W ...
Biology Products: