C - Chemistry – Metallurgy – 12 – N
Patent
C - Chemistry, Metallurgy
12
N
C12N 15/82 (2006.01) A01H 5/00 (2006.01) C08B 30/00 (2006.01) C08B 30/12 (2006.01) C12N 9/10 (2006.01)
Patent
CA 2388364
Disclosed is potato starch which, when in native form extracted from a potato plant, exhibits freeze/thaw stability such that a 1 %w/v aqueous suspension of the starch has an absorbance at 700nm wavelength of less than 1.2 units following 4 freeze/thaw cycles of freezing at -70 ~C overnight and thawing at room temperature for at least 2 hours; together with a method of altering the starch content of a plant; and altered plants, especially altered plants which contain freeze/thaw stable starch. Further disclosed is waxy (i.e. low amylose) starch having reduced gelatinization onset and swelling temperatures.
L'invention concerne la fécule de pomme de terre, qui dans sa forme native, extraite de la pomme de terre, présente une stabilité au gel/dégel. Ainsi, une suspension aqueuse de 1 % eau/volume d'amidon possède une absorbance, à 700 nm de longueur d'onde, inférieure à 1,2 unités après 4 cycles de gel/dégel, à raison de 70 ·C la nuit, et un dégel à température ambiante pendant au moins deux heures. L'invention traite aussi d'un procédé de modification de la teneur en amidon d'une plante, et de plantes modifiées, en particulier, de plantes modifiées qui contiennent un amidon stable au gel/dégel. L'invention traite aussi d'amidon de grain cireux (c'est à dire à faible teneur en amylose) présentant des températures de gélification et de gonflement réduites.
Jobling Stephen Alan
Schwall Gerhard Peter
Westcott Roger John
National Starch And Chemical Investment Holding Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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