Soluble dietary fibre from oat and barley grains, method for...

A - Human Necessities – 23 – L

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A23L 1/105 (2006.01) C08B 37/00 (2006.01)

Patent

CA 2546948

The present invention relates to a process for the extraction of soluble dietary fibre from oat and barley grains using a enzymatic hydrolysis treatment, wherein the grain is milled and any endosperm depleted fractions thereof being rich in .szlig.-glucans are recombined, without further heat treatment, dispersed in water and then subjected to sequential enzymatic treatment with starch degrading enzymes, followed by an optional step of enzyme inactivation by wet heat treatment, and a subsequent step wherein the hydrolysate mixture is spontaneously or centrifugally separated into at least 3 distinct fractions: a first fraction, which comprises the soluble dietary fibre complex, containing more than 20 % .szlig.-glucan on a dry matter basis, a second aqueous fraction, and a third fraction comprising most of the protein and oil together with the insoluble fibrous material from the milled grain, the invention further relates to applications of use of the 3-glucan derived, as well as a set-up for carrying out the process.

La présente invention concerne un procédé d'extraction de fibres alimentaires solubles à partir de grains d'avoine et d'orge par traitement d'hydrolyse enzymatique. Le grain est broyé et tous les fragments dépourvus d'endosperme riches en .beta.-glucanes sont recombinés sans traitement thermique supplémentaire, puis dispersés dans de l'eau et soumis à un traitement enzymatique séquentiel au moyen d'enzymes de destruction de l'amidon ; ensuite, une étape optionnelle consiste en l'inactivation des enzymes par traitement thermique par voie humide. Dans une étape suivante, le mélange d'hydrolysats est spontanément ou par l'intermédiaire d'une force centrifuge, séparé au moins en trois fragments distincts : un premier fragment qui comprend le complexe de fibres alimentaires solubles et qui contient plus de 20 % de .beta.-glucane sur une base de matière sèche ; un second fragment aqueux, et un troisième fragment aqueux comprenant la plus grande partie de la protéine et de l'huile conjointement avec le matériau fibreux insoluble provenant du grain broyé. La présente invention concerne également les applications d'utilisation du .beta.-glucane obtenu, ainsi qu'un dispositif permettant la mise en oeuvre de ce procédé.

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