Crystalline maltotetraosyl glucoside, and its production and use
First Claim
1. A non-reducing crystalline maltotetraosyl glucoside selected from the group consisting of a hydrous crystalline maltotetraosyl glucoside and an anhydrous crystalline maltotetraosyl glucoside, wherein:
- (a) said hydrous crystalline maltotetraosyl glucoside has the largest diffraction angles (2θ
) of 12.6°
, 21.3°
, 22.1°
, and 22.8°
on powder X-ray diffraction analysis, exhibits two endothermic peaks at 170 to 172°
C. and 230 to 233°
C. when measured by a differential scanning calorimeter and a purity of at least 99.5; and
(b) said anhydrous crystalline maltotetraosyl glucoside has the largest diffraction angles (2θ
) of 12.7°
, 13.7°
, 18.8°
, and 23.2°
on powder X-ray diffraction analysis, exhibits one endothermic peak at 230 to 233°
C. when measured by a differential scanning calorimeter, and a purity of at least 99.5%.
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Abstract
Novel crystalline maltotetraosyl glucoside is obtained by crystallizing maltotetraosyl glucoside from a solution of maltotetraosyl glucoside, prepared by either exposing an aqueous solution of maltopentaose to the action of a non-reducing saccharide-forming enzyme or an aqueous solution which contains trehalose or a non-reducing saccharide to the action of cyclomaltodextrin glucanotransferase. The crystalline maltotetraosyl glucoside has non-hygroscopicity, non-reducibility, superior solubility, less fermentability, and other satisfactory properties of stabilizing oligopeptides and biologically-substances as well as preventing retrogradation of amylaceous substances. These features render the crystalline maltotetraosyl glucoside very useful in various compositions including foods, beverages, cosmetics, pharmaceuticals and shaped bodies.
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Citations
19 Claims
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1. A non-reducing crystalline maltotetraosyl glucoside selected from the group consisting of a hydrous crystalline maltotetraosyl glucoside and an anhydrous crystalline maltotetraosyl glucoside, wherein:
-
(a) said hydrous crystalline maltotetraosyl glucoside has the largest diffraction angles (2θ
) of 12.6°
, 21.3°
, 22.1°
, and 22.8°
on powder X-ray diffraction analysis, exhibits two endothermic peaks at 170 to 172°
C. and 230 to 233°
C. when measured by a differential scanning calorimeter and a purity of at least 99.5; and(b) said anhydrous crystalline maltotetraosyl glucoside has the largest diffraction angles (2θ
) of 12.7°
, 13.7°
, 18.8°
, and 23.2°
on powder X-ray diffraction analysis, exhibits one endothermic peak at 230 to 233°
C. when measured by a differential scanning calorimeter, and a purity of at least 99.5%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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- 17. A process for preparing a composition containing a crystalline maltotetraosyl glucoside, which comprises a step of incorporating said crystalline maltotetraosyl glucoside into a material for a product selected from the group consisting of foods, beverages, cosmetics, pharmaceuticals and shaped bodies.
Specification