Expertise documents

TECHNICAL ARTICLE – GUARDIA

Active bio-protection in red wines with Metschnikowia pulcherrima

ONE OF THE NON-SACCHAROMYCES YEASTS STUDIED IS METSCHNIKOWIA PULCHERRIMA. THIS ARTICLE WILL FOCUS ON THE ANTAGONISTIC ACTIVITY OF A SPECIFIC STRAIN, M. PULCHERRIMA LEVEL2 GUARDIA™, ON OTHER WINE YEAST SPECIES FOR BIO PROTECTION APPLICATIONS. BY Amandine Deroite To read more please click on the link below:  GUARDIA Active bio protection article for red wines November 2021 (002)

TECHNICAL ARTICLE

What's so Special about Specialty Wine Yeast?

For more than 50 years now, selected wine yeasts have been used by winemakers successfully in active dry yeast form. It has been longer than that, since Pasteur discovered that Saccharomyces cerevisiae was responsible for alcoholic fermentation, that winemakers have intuitively selected the best wine yeasts. Now, with dedicated selection program, winemakers have access to the best of the best in terms of wine yeasts. Why is there so many available and what sets them apart from one another? These are why, selected wine yeast are special..... To read more, click on the link below: Whats so special about specialty wine yeast

Micro agglomeration & bioavailability of sterols – the revolutionary wine yeast protector

Faster Yeast Rehydration   🍷The impact on the fermentation process and final wine quality are now greater due to climate change, with higher sugar/ethanol contents, higher pH’s, off-flavours caused by yeast stress, sluggish or stuck fermentations and higher microbial contaminants. It is now crucial to select wine yeast in dry form (ADY) in the optimal physiological state to have healthy and active populations capable of completing alcoholic fermentation. 🔬Over the last 20 years, scientific information on yeast nutrition management in winemaking has significantly increased. The role of key nutrients, such as nitrogen sources, oxygen and micronutrients like vitamins and minerals, have been the subject of research and publications,5,1,7 showing their impact on fermentative activity and wine sensory profile. 🔬In parallel, specific research has focused on how sterols influence yeast’s physiological state and metabolism and how it was directly correlated with a secure end of fermentation.7,4,6 It has been shown that using specific yeast autolysates rich in sterols during the rehydration step of the ADY increases the fermentation activity and vitality during fermentation, particularly in the last part, when alcohol levels become toxic for the yeasts. This is related to improving yeast cell stress resistance correlated with better membrane integrity. 🍷ADY rehydrated with protectors (Go-Ferm Protect™/Go-Ferm Protect Evolution™) maintains their viability and vitality until the end of fermentation, decreasing the risk of stuck or sluggish fermentations, avoiding undesirable aroma production, and resulting in an increase of the aroma compound synthesis by the yeast with the protectors. The incorporation of the sterols in the ADY rehydrated with protector leads to an increase in their membrane lipid composition and healthier cell membrane. The protector effect is notable at different temperatures, high potential alcohol, lack of oxygen or low turbidity in white and rosés. This article was published in the November issue of the WineLand magazine. Read the full article at the link below: Micro agglomeration bioavailability of sterols  

NUTRIENTS

Optimise wine yeast nutrition with StimulaTM

Winemakers face many challenges associated with climate changes. Better quality nutrients are required to overcome those issues. Higher sugars and pHs can lead to a higher level of contaminants, and specific nutrients can assist to manage the alcoholic fermentation (AF). Research has shown that a well-balanced organic nutrition can increase yeast viability and vitality, improves wine aromatic expression due to optimized assimilation. The timing of addition of key nutrients will optimize varietal aromatics expression. To read more, please click on the link below. UI Stimula Cabernet - ENG (002)

Product Catalogue 2023/2024

Product Catalogue 2023 / 2024

  Dear customer the latest Lallemand SA product catalogue is availably. Kindly requests your copy from your relevant Technical Sales Managers. The digital copy is available at the link below. Katalogus 2023 2024R