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Level2 Initia™ – yeast for bioprotection of white and rosé juice in the pre-fermentation phase

Level2 Initia™ – yeast for bioprotection of white and rosé juice in the pre-fermentation phase

The pre-fermentation phase during the vinification of white and rosé wines significantly increases the quality of the wines, but also carries the risk of oxidation and the development of spoilage microorganisms. These risks may result in loss of quality.

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Bioprotection – a microbial alternative to SO2

Bioprotection – a microbial alternative to SO2

Healthy grapes have a complex microbial ecology including filamentous fungi, yeasts and bacteria. The variety and population of microorganisms present on the grape surface will depend on many factors. However, high sugar concentrations on the berry surface of damaged grapes will especially favour the increase of undesirable microorganisms, such as acetic acid bacteria and wine spoilage yeasts. These microbes are transferred to the must during processing and can have a profound influence on wine composition, flavour and quality. Populations can increase with extended duration of pre-fermentation operations, such as grape transportation, cold soaking, cold storage of juices or grape dehydration. Winemaking strategies to reduce the population of unwanted microbes usually include the use of sulphur dioxide. With the increasing demand for low sulphur dioxide wines, alternative strategies such as bioprotection are explored.

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A story of taste, colour and phenolics

A story of taste, colour and phenolics

Phenolic compounds are abundant in the plant kingdom. They are derived from phenol, which is the basic structure of all phenolic constituents and when containing one or more phenolic rings, they are generally referred to as polyphenols. These phenolic compounds play an essential role in the grapevine’s defence mechanisms against biotic and abiotic stressors. They are also strongly linked to wine quality, colour and flavour.

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