5104665 Malolactic fermentation of wine

5104665 Malolactic fermentation of wine

PATENT ABSTRACTS produce, upon enzyme cleavage, a chromogen exhibiting a large change in absorbance and a pKa below 7. Such substrates find use as in...

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PATENT ABSTRACTS

produce, upon enzyme cleavage, a chromogen exhibiting a large change in absorbance and a pKa below 7. Such substrates find use as indicators for the determination of enzyme analytes and enzymes used as markers in a variety of assays, including immunoassays.

5104665 MALOLACTIC FERMENTATION OF WINE

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continuous basis. The cells may be immobilized within the reaction vessel.

5104980 CHROMOGENIC DIBENZOXAZEPINONE AND DIBENZOTHIAZEPINONE ENZYME SUBSTRATES Paul F Corey assigned to Miles Inc

Graham Australia

Fleet, Peter J Costello, Sydney, assigned to Unisearch Limited

A process and equipment for the controlled malolactic fermentation of wine in which wine is introduced into a reaction vessel containing a concentration of at least 108 cfu/ml of a bacterial or yeast species that is capable of converting malic acid to lactic acid through a bacteria retaining filter. The wine is removed from the reaction vessel through a bacteria retaining filter after a predetermined residence time in the reaction vessel sufficient to allow the desired malolactic fermentation to take place. The process and equipment are preferably operated on a

Chromogenic enzyme substrate compounds comprising a dibenz(b,e)( 1, 4)oxazepinone or dibenzo(b,e)( I ,4)thiazepinone nucleus having an enzyme-cleavable group such as a radical of a sugar, carboxylic acid, amino acid, peptide, phosphoric acid, or sulfuric acid. The substrate compounds are, in general, highly soluble in aqueous media and only slightly colored, and produce, upon enzyme cleavage, a chromogen exhibiting a large change in absorbance and a pKa below 7. Such substrates find use as indicators for the determination of enzyme analytes and enzymes used as markers in a variety of assays, including immunoassays.