THE EFFECT OF $gamma$-RAYS ON POTATO STARCH. (ENGLISH TEXT)
Air-dried potato starch granules containing l8.5% moisture were irradiated from a source of l,400 C. Co65 with doses of 10/sup 5/--l0/sup 8/ r. After irradiation, the intrinsic viscosity and viscoelasticity, measured with a V.l. viscometer, and the blue value of the starch specimens decreased, while the reducing sugar value, alkali lability number, carboxyl value and carbonyl number of the specimens increased with the radiation dose. X-ray diffraction diagrams showed that the crystalline part of the potato starch was damaged after doses of up to l.5 x 10/sup 7/ r. From the highly irradiated product of potato starch granules, D-glucose, maltose, arabinose, D-gluconic acid, D-glucuronic acid and a series of small dextrins were identified by paper chromatography. These mono- and oligo-saccharides were analyzed by anion exchange column chromatography, and D-glucose and maltose were shown to be the main fission products. Gases in the products of starch granules were also analyzed chromatographically after gamma - irradiation and hydrogen, carbon mono- and di-oxide were identified. These results indicated that hydrolysis and oxidation of starch specimens occur during irradiation. Therefore, potato starch is considered, like ce dation type polymer under these conditions. (auth)
- Research Organization:
- Usaka Univ.
- NSA Number:
- NSA-16-022237
- OSTI ID:
- 4837797
- Journal Information:
- Mem. Inst. Sci. and Ind. Research, Osaka Univ., Journal Name: Mem. Inst. Sci. and Ind. Research, Osaka Univ. Vol. Vol: 17
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
PHYSICAL AND CHROMATOGRAPHICAL OBSERVATIONS OF $gamma$-IRRADIATED POTATO STARCH GRANULES
ACTION OF IONISING RADIATIONS ON AQUEOUS SOLUTIONS OF CARBOHYDRATES