Navigation Links
After the yeast is gone bacteria continue to develop flavor of sparkling wine

Researchers at the University of Barcelona, Spain, show for the first time that bacteria, in addition to yeast, are involved in the secondary fermentation of the sparkling wine known as Cava. They report their findings today at the 105th General Meeting of the American Society for Microbiology.

"Bacteria found in Cava samples could have a distinctive impact upon sparkling wine quality in terms of aroma, flavor, bubble size and bubble persistence, especially for premium quality wines," says NĂºria Rius, a researcher on the study.

The traditional Champenoise method of sparkling wine production requires addition of sucrose and yeast strains to the base wine for a second fermentation in the bottle in which the wine is sold. The secondary fermentation produces carbon dioxide which dissolves in the wine and is perceived as bubbles when the bottle is opened, hence the term "sparkling". After the fermentation is completed the Cava wine is aged in the bottles with the yeast for at least nine months, or longer for premium quality wines. During aging, substantial chemical changes take place due to cell lysis which contributes to the sensory characteristics of Cava.

The researchers isolated 617 microbial strains from two Cavas, after 9 to 17 months of bottling. No yeasts were isolated after 10 months of bottling. Gram-negative and Gram-positive bacteria were isolated from both wines. Different phases of the aging process are dominated by different bacteria. Gram-negative bacteria were quickly replaced by Gram-positive bacteria, and after 17 months only Gram-positive bacteria were detected in both sparkling wines.

"The products released by the yeast cells affect wine flavor and serve as nutrients for the growth of bacteria. Although yeasts have the dominating influence on the chemical composition of wine, some changes which influence the sensory quality and consumer acceptability of the wine could be due to growth and lysis of bacteria," says Rius.< /p>
'"/>

Source:American Society for Microbiology


Related biology news :

1. Bone Density Recovers After Teens Stop Injected Contraceptive
2. Youth With HIV Take More Risks After New Meds Introduced
3. After a time-shift, mixed signals from the circadian clock
4. Drug Offers Alternative to Surgical Treatment After Miscarriage
5. Menopause Symptoms May Come Back After Stopping Menopausal Hormone Therapy
6. Researchers Find Drug May Give Some Cardiac Protection 24 Hours After Heart Attack
7. Examination of internal wiring of yeast, worm, and fly reveals conserved circuits
8. Navigating an integrated yeast network
9. GlycoFi announces the first production of antibodies with human glycosylation in yeast
10. From a lowly yeast, researchers divine a clue to human disease
11. GlycoFi and Dartmouth report full humanization of yeast glycosylation pathway in Science

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/26/2016)... , April 27, 2016 ... the  "Global Multi-modal Biometrics Market 2016-2020"  report to ... ) , The analysts forecast the ... CAGR of 15.49% during the period 2016-2020.  ... number of sectors such as the healthcare, BFSI, ...
(Date:4/15/2016)... April 15, 2016  A new partnership announced ... accurate underwriting decisions in a fraction of the ... priced and high-value life insurance policies to consumers ... With Force Diagnostics, rapid testing (A1C, Cotinine ... readings (blood pressure, weight, pulse, BMI, and activity ...
(Date:4/14/2016)... , April 14, 2016 ... Malware Detection, today announced the appointment of Eyal ... new role. Goldwerger,s leadership appointment comes at ... heels of the deployment of its platform at several ... biometric technology, which discerns unique cognitive and physiological factors, ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... NEW YORK , June, 23, 2016  The ... students to envision new ways to harness living systems ... of Modern Art (MoMA) in New York ... more than 130 participating students, showcased projects at MoMA,s ... included Paola Antonelli , MoMA,s senior curator of ...
(Date:6/23/2016)... Apellis Pharmaceuticals, Inc. today announced positive ... its complement C3 inhibitor, APL-2. The trials were ... studies designed to assess the safety, tolerability, pharmacokinetics ... healthy adult volunteers. Forty subjects were ... dose (ranging from 45 to 1,440mg) or repeated ...
(Date:6/23/2016)... ... June 23, 2016 , ... Regulatory ... technical consulting, provides a free webinar on Performing Quality Investigations: Getting ... at 12pm CT at no charge. , Incomplete investigations are still a major ...
(Date:6/22/2016)... 22, 2016 Research and Markets has announced ... report to their offering. ... from $29.3 billion in 2013. The market is expected to grow ... 2015 to 2020, increasing from $50.6 billion in 2015 to $96.6 ... during the forecast period (2015 to 2020) are discussed. As well, ...
Breaking Biology Technology: