Navigation Links
The microbial hydrocarbon diet
Date:6/11/2009

Bioremediation of industrial sites and petrochemical spillages often involves finding microbes that can gorge themselves on the toxic chemicals. This leaves behind a non-toxic residue or mineralized material. Writing in the International Journal of Environment and Pollution, researchers in China describe studies of a new microbe that can digest hydrocarbons.

Hong-Qi Wang and Yan-Jun Chen College of Water Sciences, Beijing Normal University, working with Bo-Ya Qin of the Ministry of Environmental Protection of China, have investigated the activity of enzymes from the bacterium Bacillus cereus DQ01, which can digest the hydrocarbon n-hexadecane. The bacterium was initially isolated from the Daqing oil field in North East China where it had evolved the ability to metabolize this chemical.

Bioremediation of hydrocarbons usually involves the application of a cultured bacterium that has been optimized to feed on the specific contaminants, such as particular hydrocarbons. The microbes are cultured first in the presence of sugar or another standard feedstuff in conjunction with a small amount of the pollutant material. Successive generations are fed an increasing proportion of the pollutant until their growth is optimized for digestion of that compound rather than the sugar.

These optimized microbes are applied to the contamination site or spill in large but controlled volumes and digest their way through the pollutant material, multiplying and digesting until no pollutant remains. The byproducts are non-toxic carbon dioxide and water, and mineralized matter.

The team has now found the optimal conditions for the Daqing microbe to feast on hydrocarbon, which could point the way to a more effective approach to bioremediation of spill sites.

The key step in the degradation of hydrocarbons normally depends on the presence of a multi-component enzyme system, the team explains. Understanding exactly which components are needed for degradation and the temperature and pH of the soil best suited to the process could help researchers develop the perfect microbial cleanup culture.

The team has now found that enzymes within the microbial cell and in its membrane inner membrane are responsible for degradation of n-hexadecane. The team found that neutral pH and a temperature of 30 Celsius are optimal for the microbe to produce the main degradation enzyme. They also point out that adding a small amount of a surfactant material, rhamnolipid, can also stimulate enzyme production and improve degradation efficiency.


'/>"/>

Contact: Hong-Qi Wang
whongqi310@sohu.com
86-105-880-7810
Inderscience Publishers
Source:Eurekalert

Related medicine news :

1. Virginia Techs Raving First Year Results Lead to Additional High-Tech Antimicrobial Defense from SportCoatings(TM)
2. Replidyne Pipeline Featured at 47th Annual Interscience Conference on Antimicrobial Agents and Chemotherapy
3. Stress Robs Skin of Antimicrobial Defenses
4. Scientists seek to assess the microbial risks in the water we drink
5. Microban International Partners with Magic American Products to Launch Magic(R) Brand Products with Microban(R) Antimicrobial Product Protection
6. Seal Shield Ships New SILVER SEAL(TM) Washable, Antimicrobial Keyboard
7. Microbial cheaters help scientists ID social genes
8. Seal Shield Introduces New Silver Seal Washable, Antimicrobial Mouse at HiMSS Healthcare Symposium
9. Hill-Rom Selects NanoHorizons to Provide Antimicrobial Protection for Hill-Rom Products Using Nanotechnology
10. Confronting the challenge of antimicrobial resistance
11. U.S. EPA Approves Registration of Antimicrobial Copper Alloys
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/19/2017)... ... August 19, 2017 , ... ... of breastfeeding mothers. These illustrations show the diversity of the breastfeeding mothers, ... a wide range of sizes. These illustrations are also available on tote bags, ...
(Date:8/19/2017)... ... August 19, 2017 , ... Physician Partners of America ... as an interventional pain management physician. He brings a wealth of pain management ... headaches, and significant experience in spinal cord stimulation for chronic pain. , Dr. ...
(Date:8/18/2017)... , ... August 18, 2017 , ... More than 20,000 ... Republic of Congo (DRC) thanks to an ambitious venture that conjoined the passions of ... the generous support of the Liberty community. These shoes will save lives from the ...
(Date:8/18/2017)... NY (PRWEB) , ... August 18, 2017 , ... ... of “Vision & Hearing” campaign, advocating for active, healthy lifestyles and highlighting the ... available for individuals with hearing impairments and shares the latest innovations in hearing ...
(Date:8/18/2017)... ... 18, 2017 , ... As an industry leader, Eppendorf is ... will present the line of epMotion automated liquid handling system. This automated liquid ... everyday pipetting tasks. , Ideal for scientists and lab technicians with no or ...
Breaking Medicine News(10 mins):
(Date:8/7/2017)... -- Zimmer Biomet Holdings, Inc. (NYSE and SIX: ZBH), a ... of Directors has approved the payment of a quarterly cash ... The cash dividend of $0.24 ... 2017 to stockholders of record as of the close of ... subject to approval of the Board of Directors and may ...
(Date:8/4/2017)... CINCINNATI , Aug. 3, 2017  Agragen, ... science company active in the biopharmaceutical, nutraceutical, and ... its development of its lead drug candidates, AGR131.  ... a proinflammatory cytokine from the blood of patients ... psoriasis, and inflammatory bowel disease. ...
(Date:8/2/2017)... 2, 2017 CaryRx, a next-generation full-service pharmacy, has ... for patients in the Washington D.C. ... by providing delivery of medications through the convenience of its ... or delivered within one hour to any location in D.C. ... bring this invaluable service to Washington D.C. ...
Breaking Medicine Technology: