Featured Research

from universities, journals, and other organizations

New methodology to find out about yeast changes during wine fermentation

Date:
April 8, 2014
Source:
Elhuyar Fundazioa
Summary:
A new methodology that makes it possible to know what physiological state the yeast is in at each point in the wine fermentation process has been developed. “By drawing an analogy with cinema,” he explained, "wine fermentation would be a full-length film from which, thanks to this methodology, we could extract all the stills that comprise it.”

Rubén Martínez, a graduate in Biology and Biochemistry, has developed a new methodology that makes it possible to know what physiological state the yeast is in at each point in the wine fermentation process. "By drawing an analogy with cinema," he explained, "wine fermentation would be a full-length film from which, thanks to this methodology, we could extract all the stills that comprise it."

This knowledge is of particular interest for producers, since changes in the grape directly affect the chemical composition of the must. The thesis entitled "Estudios avanzados de la fisiología de levadura en condiciones de vinificación. Bases para el desarrollo de un modelo predictivo" [Advanced studies into yeast physiology in vinification conditions. Bases for developing a forecasting model] is part of the Demeter project. This project seeks to study and find out the effects of climate change on viticultural and oenological activities, and to come up with new strategies to address the problems caused by global climate change on viticulture and wine production.

One of the effects of climate change on vineyards is the fall in their productivity, changes in the distribution of the pests and diseases that affect them, and changes in the chemical composition of the grape. "The main aim of this thesis is to contribute towards the development of a model to forecast the behaviour of the Saccharomyces cerevisiae yeast during the vinification process. This would make it possible to know in advance how this yeast responds to the changes (many of which are due to climate change) that are taking place in the chemical composition of grape must," pointed out the author of this research.

Simulating the yeast's metabolism

The main aim of this thesis was to contribute towards the development of a model for forecasting the metabolism of S. cerevisiae during the vinification process. This work has shown that an exhaustive and detailed study of the fermenting process allows the process to be divided into various stages or phases and that each one of them can be imitated in continuous cultivation. Another of the achievements has been to develop a model that enables the metabolism of the yeast to be simulated.

This thesis also demonstrates the need and importance of knowing the chemical composition of the must in the winery, in particular the nitrogen content that the yeast can assimilate and the nitrogen requirements of the yeast. "By knowing these two parameters," pointed out the researcher, "it is possible to design different protocols for taking action during the fermenting process in order to improve the organoleptic quality of the wine."


Story Source:

The above story is based on materials provided by Elhuyar Fundazioa. Note: Materials may be edited for content and length.


Journal Reference:

  1. Rubén Martínez-Moreno, Manuel Quirós, Pilar Morales, Ramon Gonzalez. New insights into the advantages of ammonium as a winemaking nutrient. International Journal of Food Microbiology, 2014; 177: 128 DOI: 10.1016/j.ijfoodmicro.2014.02.020

Cite This Page:

Elhuyar Fundazioa. "New methodology to find out about yeast changes during wine fermentation." ScienceDaily. ScienceDaily, 8 April 2014. <www.sciencedaily.com/releases/2014/04/140408122004.htm>.
Elhuyar Fundazioa. (2014, April 8). New methodology to find out about yeast changes during wine fermentation. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2014/04/140408122004.htm
Elhuyar Fundazioa. "New methodology to find out about yeast changes during wine fermentation." ScienceDaily. www.sciencedaily.com/releases/2014/04/140408122004.htm (accessed August 29, 2014).

Share This




More Plants & Animals News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) — State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Raw: Australian Sheep Gets Long Overdue Haircut

Raw: Australian Sheep Gets Long Overdue Haircut

AP (Aug. 28, 2014) — Hoping to break the record for world's wooliest, Shaun the sheep came up 10 pounds shy with his fleece weighing over 50 pounds after being shorn for the first time in years. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Minds Blown: Scientists Develop Fish That Walk On Land

Minds Blown: Scientists Develop Fish That Walk On Land

Newsy (Aug. 28, 2014) — Canadian scientists looking into the very first land animals took a fish out of water and forced it to walk. Video provided by Newsy
Powered by NewsLook.com
Huge Ancient Wine Cellar Found In Israel

Huge Ancient Wine Cellar Found In Israel

Newsy (Aug. 28, 2014) — An international team uncovered a large ancient wine celler that likely belonged to a Cannonite ruler. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins