Navigation Links
Researchers tap yeasts as source of 'green' surfactants
Date:7/28/2011

This release is available in Spanish.

Surfactants, which are wetting agents that lower a liquid's surface tension, have a long list of uses, from detergents and cosmetics to paints and pesticides. Most surfactants are petroleum-based. But in Peoria, Ill., a team of U.S. Department of Agriculture (USDA) scientists has focused their attention on sophorolipids, surfactant-like molecules produced by naturally occurring yeasts.

Microbiologist Cletus Kurtzman is spearheading the studies at the National Center for Agricultural Utilization Research (NCAUR), operated in Peoria by the Agricultural Research Service (ARS), USDA's chief intramural scientific research agency.

Using phylogenetic analysis and mass-spectrometry, Kurtzman's team screened 19 of the 40 known members of the Starmerella yeast family for their ability to produce the sophorolipids.

Phylogenetics, which traces the evolutionary relationships between species or groups, was particularly useful because it enabled the team to determine which Starmerella members produce the molecules based on shared gene sequences for the trait. For example, only a few Candida yeast species had previously been shown to make the sophorolipids-most notably, C. bombicola and C. apicola.

Kurtzman's team was able to broaden its search by tapping the ARS (microbial) Culture Collection, maintained at the Peoria center's Bacterial Foodborne Pathogens and Mycology Research Unit.

In studies there, the researchers cultured the yeasts on a diet of glucose oleic acid. They then measured the yeasts' sophorolipid production levels over a 24- to 168-hour period using mass-spectrometry analysis, which can identify compounds based on their unique molecular weights.

As expected, C. bombicola and C. apicola boasted the highest sophorolipid yields. They weren't the only ones, though: The team's analysis also turned up three other high-producing yeasts, including a new Candida species.

According to Kurtzman, the findings add to a short list of candidate yeasts with potential use in fermentation-based methods of mass-producing the sophorolipids as green alternatives to petroleum-derived surfactants.

He and ARS team members Neil Price, Karen Ray and the late Tsung-Min Kuo reported their work in FEMS Microbiology Letters.


'/>"/>

Contact: Jan Suszkiw
301-504-1630
United States Department of Agriculture - Research, Education and Economics
Source:Eurekalert

Related biology news :

1. NC State researchers get to root of parasite genome
2. Researchers find animal with ability to survive climate change
3. Researchers find an essential gene for forming ears of corn
4. Researchers note differences between people and animals on calorie restriction
5. Researchers study acoustic communication in deep-sea fish
6. Researchers discover that growing up too fast may mean dying young in honey bees
7. Researchers study how pistachios may improve heart health
8. UI researchers find potentially toxic substance present in Chicago air
9. Researchers develop new self-training gene prediction program for fungi
10. Case Western Reserve University researchers track Chernobyl fallout
11. Childrens National researchers develop novel anti-tumor vaccine
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/26/2016)... Research and Markets has announced ... 2016-2020"  report to their offering.  , ,     (Logo: ... analysts forecast the global multimodal biometrics market to ... period 2016-2020.  Multimodal biometrics is being ... the healthcare, BFSI, transportation, automotive, and government for ...
(Date:4/15/2016)... 15, 2016 Research and ... Biometrics Market 2016-2020,"  report to their offering.  , ... , ,The global gait biometrics market is expected ... the period 2016-2020. Gait analysis generates ... be used to compute factors that are not ...
(Date:3/31/2016)... RATON, Florida , March 31, 2016 ... LEGX ) ("LegacyXChange" or the "Company") ... for potential users of its soon to be launched ... video ( https://www.youtube.com/channel/UCyTLBzmZogV1y2D6bDkBX5g ) will also provide ... the use of DNA technology to an industry that ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... ... 2016 , ... FireflySci has been manufacturing quartz and glass ... the globe. Their cute firefly logo has been spreading to more and more ... calibration standards that never require recalibration. These revolutionary standards have changed many ...
(Date:5/25/2016)... ... May 25, 2016 , ... The American Medical Informatics Association ... the National Coordinator for Health IT (ONC) outlining a measurement approach to interoperability ... available when and where it was needed. The organization of health informatics professionals ...
(Date:5/24/2016)... ... May 24, 2016 , ... Cell therapies for a ... accelerated by research at Worcester Polytechnic Institute (WPI) that yielded a newly patented ... regeneration. , The novel method, developed by WPI faculty members Raymond Page, PhD, ...
(Date:5/23/2016)... Willoughby, Ohio (PRWEB) , ... May 23, 2016 ... ... Six Trends That Will Drive Precision Farming in 2017 and Beyond. The paper ... and practitioners in the precision ag industry. , “We’ve witnessed a lot of ...
Breaking Biology Technology: