Anti-retrograding effects of rare sugars on starch
Transcription
Anti-retrograding effects of rare sugars on starch
Foods 05 Anti-retrograding effects of rare sugars on starch (Keywords: D-Psicose, Starch, Prevention of aging) ●Research representative Shoichi Gotani, Professor, Kagawa University Faculty of Agriculture Outline of technology Temperature (℃) Sales points ●High anti-retrograding effect on starch. Expected application fields and products (1) Emulsifiers (2) Secondary food materials (3) Food additives Comparison with existing products Disadvantages Advantages Temperature at the beginning of gelatinization Anti-aging effect Cost D-Psicose Low High A few thousand yen/kg Sucrose High High 200 yen/kg References, patents, etc. None Other matters to note (Developer’ s comment) Sucrose prevents retrograding of starch because of its strong hydration ability but increases the gelatinization temperature of starch. We think that sucrose also prevents hydration of starch because of its high hydration ability. In contrast, D-psicose has a similar preventive effect on retrograding of starch but increases the gelatinization temperature only slightly and shows no marked inhibitory effect on gelatinization. D-Psicose may improve the production efficiency of starch foods containing sugars. (Developer’ s contact address) TEL: +81-87-891-3103 E-mail: [email protected] Kagawa Prefecture Glyco-Biocluster Formation Project Collection of Technological Achievements Related to Rare Sugars Control of retrograding of starch is important for Kikyo + Sucrose its processing and storage. While sucrose is Kikyo + D-Allose known to decelerate retrograding of starch, it Kikyo + D-Psicose tends to be avoided in modern society due to its Momiji + Sucrose high calorie. D-Psicose, a non-calorie sugar with Momiji + D-Allose about 70% of sweetness of sucrose, will be Momiji + D-Psicose expected for is shown to be useful for the prevention of retrograding of starch, it will be the discovery of a new use of a rare sugar in the food field. Therefore, we investigated the effect of Dpsicose, D-allose, psico-rare sugar (3:1 mixture of D-fructose and D-psicose), sucrose, and DRatio of sugar relative to starch fructose on the retrograding of starch with the Figure: Effects of sugars on the temperature measurements DSC, amylose content, and at the beginning of gelatinization of starch texture of starch. The temperature at the beginning of gelatinization was highest in the starch gel with sucrose, followed by the starch gel with D-allose and the starch gel with D-psicose (Figure). Measurement of the hardness stress of the gels after storage for 1 hour indicated that Dpsicose inhibited gelatinization of kikyo (nonglutinous rice) similar as emulsifier. Measurements after storage for 7 days or longer showed that the addition of sucrose and D-psicose prevented hardening of both kikyo and momiji (glutinous rice), i.e. inhibited aging. Glyco-Bio Project Team, Technical Promotion Division, Kagawa Industry Support Foundation 1st floor, FROM Kagawa, 2217-16 Hayashi-cho, Takamatsu City, Kagawa 761-0301 Japan TEL: +81-87-840-0338 FAX: +81-87-864-6303 URL http://www.kagawa-isf.jp/ ●Research theme