Preparation of canola protein isolate and use in aquaculture

Details Preparation of canola protein isolate and use in aquaculture Preparation of canola protein isolate and use in aquaculture

A - Human Necessities

23

J

A23J 1/14 (2006.01) A23J 3/14 (2006.01) A23K 1/14 (2006.01) A23K 1/18 (2006.01) C11B 1/10 (2006.01)

Patent

CA 2556711

A canola protein isolate useful in aquaculture is formed by a procedure in which canola oil seed meal is extracted to cause solubilization of protein in the canola oil seed meal to form an aqueous protein solution having a protein content of about 5 to about 40 g/L and a pH of about 5 to about 6.8. After separation of the aqueous protein solution from the residual canola oil seed meal, the protein concentration is increased to at least about 50 g/L while maintaining the ionic strength substantially constant by using a selective membrane technique. The concentrated protein solution is dried to provide a canola protein isolate having a protein content of at least about 90 wt% (N x 6.25) d.b.

L'invention concerne un isolat de protéines de canola pouvant être utilisé en aquaculture, cet isolat étant formé au moyen d'une procédure au cours de laquelle de la farine de graines oléagineuses de canola est extraite pour entraîner la solubilisation de protéines dans la farine de graines oléagineuses de canola, et ainsi former une solution aqueuse de protéines présentant une teneur en protéines comprise entre approximativement 5 et approximativement 40 g/L ainsi qu'un pH compris entre approximativement 5 et approximativement 6,8. La procédure consiste ensuite à séparer la solution aqueuse de protéines et la farine de graines oléagineuses de canola résiduelle, et à augmenter la concentration en protéines pour qu'elle atteigne au moins approximativement 50 g/L, la force ionique étant maintenue sensiblement constante au moyen d'une technique à membrane sélective. La solution de protéines concentrée est ensuite séchée pour obtenir un isolat de protéines de canola dont la teneur en protéines correspond à au moins approximativement 90 % en poids (N x 6,25) d.b.

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