HOME >> BIOLOGY >> NEWS
After the yeast is gone bacteria continue to develop flavor of sparkling wine

ATLANTA June 7, 2005 -- 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 Nria 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 b
'"/>

Contact: Jim Sliwa
jsliwa@asmusa.org
202-942-9297
American Society for Microbiology
7-Jun-2005


Page: 1 2

Related biology news :

1. After a decades-long search, scientists identify new genetic risk factors for multiple sclerosis
2. After scrutiny, preemie lung treatments turn out to be safe, effective
3. After 2 years, study shows Revlimid patients live longer and remain transfusion free
4. After North Korea test, what can be done to reduce the growing nuclear threat?
5. After insects attack, plants bunker sugars for later regrowth
6. After the Hurricanes
7. After a time-shift, mixed signals from the circadian clock
8. After flu exposure, mild exercise protects mature mice from dying
9. Tiny tweezers and yeast help St. Jude show how cancer drug works
10. Hives ferment a yeasty brew, attract beetle pest
11. Vitamin extends life in yeast, Dartmouth Medical School researchers find

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


(Date:6/23/2020)... ... June 23, 2020 , ... ... development services, today announced that the company has received ISO9001:2015 certification for ... diagnostics, and research industries. The decision to pursue ISO9001 accreditation demonstrates Kemp’s ...
(Date:6/23/2020)... ... June 22, 2020 , ... The field of quantitation of large ... (LBA) have dominated this area. However, the use of mass spectrometry in this field ... necessitates the question “How do you choose which approach to use (LBA or MS)?” ...
(Date:6/23/2020)... ... June 23, 2020 , ... In its June 22 online post, business ... James L. Sherley, M.D., Ph.D., founder and director of stem cell biotechnology company ... June 16 that starting July 5 it would begin offering free tissue ...
Breaking Biology News(10 mins):
(Date:7/7/2020)... ... July 06, 2020 , ... R3 International is now offering stem cell therapy ... stem cells. Depending on the patient's condition, treatment may be offered IV, intrathecal or ... some form of Alzheimers dementia, and the incidence continues to increase as individuals live ...
(Date:7/1/2020)... ... June 29, 2020 , ... The Interlocal ... contracts to its membership, recently named BioFit Engineered Products an Awarded ... to purchase ergonomic seating, cafeteria tables, book trucks and carts at discounted pricing ...
(Date:6/28/2020)... ... June 25, 2020 , ... ... to develop a vaccine or drug treatment. In an effort to better understand ... publicly released the world’s largest imaging dataset portraying therapeutic compound effects from over ...
(Date:6/23/2020)... ... , ... Kerafast Inc. , developers of an online ... of the Delta-G-VSV Pseudotyping System for coronavirus research applications. The system, developed by ... entry and COVID-19 vaccine effectiveness at just biosafety level 2 (BSL-2) containment. , ...
Breaking Biology Technology:
Cached News: