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:3/24/2017)... MILAN , March 24, 2017 The Controller ... Deputy Controller Mr. Abdulla Algeen have received the prestigious international ... Continue Reading ... ... small picture) and Deputy Controller Abdulla Algeen (small picture on the right) ...
(Date:3/22/2017)... , March 21, 2017   Neurotechnology ... object recognition technologies, today announced the release of ... (SDK), which provides improved facial recognition using up ... on a single computer. The new version uses ... improve accuracy, and it utilizes a Graphing Processing ...
(Date:3/20/2017)... , March 20, 2017 PMD Healthcare announces ... spirometer and Wellness Management System (WMS), a remote, real-time ... in 2010, PMD Healthcare is a Medical Device, Digital ... mission dedicated to creating innovative solutions that empower people ... that intent focus, PMD developed the first ever personal ...
Breaking Biology News(10 mins):
(Date:4/20/2017)... Diego, CA (PRWEB) , ... April 20, 2017 , ... ... management of clinical trials worldwide, announced today that they were named one of the ... , which covers the latest developments in the pharmaceutical industry. , “We take pride ...
(Date:4/20/2017)... N.J. and PETACH TIKVAH, Israel ... BCLI), a leading developer of adult stem cell technologies for ... Executive Officer, will present at the Alliance for Regenerative Medicine,s ... Day on Thursday, April 27, 2017 at 09:40 EDT in ... Ralph Kern , MD, MHSc, Chief Medical Officer & ...
(Date:4/19/2017)... ... April 18, 2017 , ... A number of new instruments ... which is part of the Protein and Cell Analysis Education Webinar Series , ... this technology fits in current and future applications. , Many flow cytometers have ...
(Date:4/19/2017)... ... , ... Nobilis Therapeutics Announces Completion of Landmark NBTX-001 Clinical Trial ... its Upcoming Post Traumatic Stress Disorder Trial , Nobilis Therapeutics, Inc. announced ... of its NBTX-001, a xenon-based therapeutic in the treatment of Panic Disorder. ...
Breaking Biology Technology: