Navigation Links
The microbial hydrocarbon diet

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
Inderscience Publishers

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:
(Date:11/24/2015)... ... November 24, 2015 , ... New patients who wish to ... for dental implants at her Mississauga, ON practice. Dr. Williams has been ... placement of dental implants. , Missing teeth can lead to a variety of ...
(Date:11/24/2015)... ... , ... In an article published November 12th by Obesity News ... or are not eligible for bariatric surgery. The article explains that candidates for weight ... 100 pounds overweight, or have a BMI of 35 and over with at least ...
(Date:11/24/2015)... , ... November 24, 2015 , ... Preparing for the ... – 3:00 p.m. EST, , FDA has long asserted that design ... apply to performing the tests and do not meet the device regulations. , Come ...
(Date:11/24/2015)... FL (PRWEB) , ... November 24, 2015 , ... In ... a growing epidemic as deaths from prescription opioids in the United States grew 400 ... cocaine. In 2013 alone, opioids were involved in 37 percent of all fatal drug ...
(Date:11/24/2015)... ... November 24, 2015 , ... American Family Care (AFC), the nation’s leading ... holiday pop-up clinic located in Metro Atlanta’s North Point Mall. The clinic is designed ... way. The location is scheduled to operate through Dec. 24. , Holiday Pop-Up Clinic ...
Breaking Medicine News(10 mins):
(Date:11/25/2015)... , November 25, 2015 ... the addition of the  "Global Drug ...  report to their offering.  --> ... addition of the  "Global Drug Device ... to their offering.  --> ...
(Date:11/24/2015)... -- The hope of bearing a child ... cycles. After failure of over 15 IVF cycles, Mrs. ... hopes that she would be able to conceive ever. But finally optimism prevailed as she ... of over 15 IVF cycles. India ... one last attempt with Gaudium IVF Center in New ...
(Date:11/24/2015)... Nov. 25, 2015 WuXi PharmaTech (Cayman) Inc. ... leading open-access R&D capability and technology platform company serving ... in China and ... an extraordinary general meeting of shareholders held today, the ... authorize and approve the previously announced agreement and plan ...
Breaking Medicine Technology: