Preparation of a dehydrated polysaccharide gel containing microorganisms and a hydrophilic substance for producing fermented drinks
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United States of America Patent
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May 6, 1997
Issued Date -
N/A
app pub date -
Dec 13, 1994
filing date -
Jul 7, 1988
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Expired
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Abstract
A polysaccharide gel enclosing microorganisms is soaked in a solution of a high concentration such as at least 500 g/l of hydrophilic substance and the gel is at least partially dehydrated to provide improved viability of the microorganisms after storage and rehydration of the gel. The dehydration may be carried out in a fluidized bed or by lyophilization. The gel may be in the form of beads or fibers having a double layer structure formed by an internal layer or core of gel containing the microorganisms and an external layer or envelope of gel essentially devoid of the microorganisms. The hydrophilic substance can be a low molecular weight polyol such as glycerol or a sugar such as sucrose, glucose or frutose. The microorganisms in the gel are preferably yeasts and after rehydration the yeast-containing gel is used in the secondary fermentation of wine to produce sparkling wine or champagne.
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