Navigation Links
Blocking carbon dioxide fixation in bacteria increases biofuel production
Date:3/30/2011

Reducing the ability of certain bacteria to fix carbon dioxide can greatly increase their production of hydrogen gas that can be used as a biofuel. Researchers from the University of Washington, Seattle, report their findings in the current issue of online journal mBio.

"Hydrogen gas is a promising transportation fuel that can be used in hydrogen fuel cells to generate an electric current with water as the only waste product," says Caroline Harwood, who conducted the study with James McKinlay. "Phototrophic bacteria, like Rhodopseudomonas palustris obtain energy from light and carbon from organic compounds during anaerobic growth. Cells can naturally produce hydrogen gas biofuel as a way of disposing of excess electrons."

Feeding these bacteria more electron rich organic compounds though, does not always produce the logically expected result of increased hydrogen production. Harwood and McKinlay analyzed metabolic functions of R. palustris grown on four different compounds to better understand what other variables might be involved.

One factor involved appears to be the Calvin cycle, a series of biochemical reactions responsible for the process known as carbon dioxide fixation. The Calvin cycle converts carbon dioxide and electrons into organic compounds. Therefore carbon dioxide-fixation and hydrogen production naturally compete for electrons.

When they tested a strain of the bacterium, which had been genetically modified to block carbon dioxide-fixation they observed an increased output of hydrogen from all four substrates.

The Calvin cycle was not the only variable affecting hydrogen production that Harwood and McKinlay identified in the paper. They also determined that the metabolic route a growth substrate took on its way to becoming a building block for making new cells also played a role.

"Our work illustrates how an understanding of bacterial metabolism and physiology can be applied to
'/>"/>

Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
Source:Eurekalert

Page: 1 2

Related biology technology :

1. New Radiation-Blocking Medical Garments Introduced at RSNA Meeting in Chicago : Demron-M Technology Provides Total Protection in a Lightweight, Durable, Flexible Fabric
2. Ultra fast photodetectors out of carbon nanotubes
3. Taming carbon nanotubes
4. Touchscreens made of carbon
5. Curved carbon for electronics of the future
6. Carbon-Based Nano-Materials and Devices Conference
7. Earthshaking possibilities may limit underground storage of carbon dioxide
8. Energy technologies not enough to sufficiently reduce carbon emissions, NYUs Hoffert concludes
9. Scientists observe single ions moving through tiny carbon-nanotube channel
10. Extreme darkness: Carbon nanotube forest covers NISTs ultra-dark detector
11. Using carbon nanotubes in lithium batteries can dramatically improve energy capacity
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/27/2014)... mysteries is how plants survive impact by the ... rays, while using this energy for photosynthesis. The ... plant,s blades quickly dissipate the energy throughout the ... at DTU Physics have now managed to successfully ... bacteria contain light-absorbing proteins which play a role ...
(Date:8/27/2014)... , Aug. 27, 2014  A novel ... to help physicians better identify early-stage disease, when ... disability, according to a new study in The ... Diagnostics (NYSE: DGX ) and other ... 14-3-3eta protein outperformed conventional antibody-serum testing, including rheumatoid ...
(Date:8/27/2014)... , Aug. 27, 2014 Research and ... "Global Enzyme for Pulp & Paper Industry Report 2014" ... Global Enzyme for Pulp & Paper Industry Report 2014 ... state of the global enzyme for pulp & paper ... of the industry including definitions, classifications, applications and industry ...
(Date:8/27/2014)... FL (PRWEB) August 27, 2014 BIOEQUA, ... applied through the use of a handheld spray, has ... the United States. , The brand began with ... BIOEQUA researchers were surprised to learn that the application ... made extremely small and delivered directly to skin's basal ...
Breaking Biology Technology:DTU researchers film protein quake for the first time 2Novel Biomarker Detects Early Rheumatoid Arthritis Better than Conventional Methods Alone, According to Journal of Rheumatology Study 2Novel Biomarker Detects Early Rheumatoid Arthritis Better than Conventional Methods Alone, According to Journal of Rheumatology Study 3Novel Biomarker Detects Early Rheumatoid Arthritis Better than Conventional Methods Alone, According to Journal of Rheumatology Study 4Global Enzyme for Pulp & Paper Industry Report 2014 2BIOEQUA'S EQUA ESSENTIAL Product Line Redefines Skin Care & Now Available in America 2
... life sciences nanotechnology company, has received a $1.6 million ... , ,The Small Business Innovation Research grant is for ... technology to enable faster screening of drugs for treatment ... liquid crystals to measure topography on a nanoscopic scale. ...
... Bruker AXS , a supplier of X-ray solutions for life ... announced on Tuesday the introduction of a new detector and ... systems were unveiled at the 2005 International Union of Crystallography ... imaging detector for macromolecular X-ray crystallography, was designed with zero ...
... investors and government representatives have suggested a series of ... stimulate investments in high-growth industries. , ,Their suggestions were ... more on that hearing, read: , Regulations still ... is a list of some of the key recommendations: ...
Cached Biology Technology:Suggestions offered to foster high-growth business investment 2
(Date:8/27/2014)... 27, 2014  WaferGen Bio-systems, Inc. (NASDAQ: WGBS) today ... public offering of units of common stock and warrants ... proceeds of $20 million, prior to deducting underwriting discounts ... The shares and warrants are immediately separable and will ... in the offering consists of 2,000 shares of common ...
(Date:8/27/2014)... A big step in understanding the mysteries of the ... three analyses that provide the most detailed comparison yet ... and human function. , The research, appearing August ... how the information encoded in the three species, genomes ... are organized into chromosomes. , The results add billions ...
(Date:8/27/2014)... , Aug. 27, 2014 Reportlinker.com ... available in its catalogue: Law Enforcement ... http://www.reportlinker.com/p02316674/Law-Enforcement-Biometrics-Market-in-North-America-2014-2018.html About Biometrics ... individuals on the basis of their physical or ... of both physiological traits such as fingerprints, face ...
Breaking Biology News(10 mins):WaferGen Bio-Systems Announces Successful Completion of Public Offering Raising $20 Million 2WaferGen Bio-Systems Announces Successful Completion of Public Offering Raising $20 Million 3Encyclopedia of how genomes function gets much bigger 2Encyclopedia of how genomes function gets much bigger 3Encyclopedia of how genomes function gets much bigger 4Law Enforcement Biometrics Market in North America 2014-2018 2Law Enforcement Biometrics Market in North America 2014-2018 3Law Enforcement Biometrics Market in North America 2014-2018 4Law Enforcement Biometrics Market in North America 2014-2018 5
... research team led by Edward Yu of Iowa State University ... pumps that remove heavy metal toxins from bacteria, making them ... the Sept. 23 issue of the journal Nature . ... of physics and astronomy, of biochemistry, biophysics and molecular biology ...
... COLUMBUS, Ohio While birds living in urban areas face ... mean urban birds face more danger from nest robbers. ... 2004 to 2009 found that, as expected, rural areas that ... cats, and crows, also showed lower rates of nest survival. ...
... of plant and animal species generally increases from the North ... isn,t true for soil bacteria, according to a new study ... that the rules determining the patterns for plant and animal ... Grogan. The finding is important because one of the ...
Cached Biology News:Iowa State, Ames Lab researchers identify structure that allows bacteria to resist drugs 2More predators doesn't equal more danger for urban bird nest 2
... Validation Service enables early selection of ... by providing quantitative data for sensitivity, ... each antibody. Furthermore quantitative antibody fingerprints ... activity of your antibodies., The full-service ...
... fluorescent microscopy-based imaging system that accurately counts ... calculates cell viability, in a single test. ... variability associated with the subjective interpretation of ... EasyCount ViaSure Kit, up to six tests ...
... new generation of microarrays to detect alternative ... to rapidly elucidate alternatively spliced events in ... drug discovery. The service combines ExonHits proprietary ... customized analysis with Agilents robust microarray platform. ...
... The new Adept CE 4100 ... provides superb flow precision, with software drive ... rates from 0.001-10mL/min are selectable in 0.001mL ... inserts, are inert and bio-compatible., Pumps may ...
Biology Products: