 BackShort Report ScienceAsia 16 (1990): 089-096 |doi: 10.2306/scienceasia1513-1874.1990.16.089
EFFECT OF VARIETY AND AGE ON PHYSICOCHEMICAL PROPERTIES OF STARCH FROM SWEET POTATOES GROWN IN THAILAND
VANNA TULYATHAN, CHAIYUTE THUNPITHAYAKUL AND WECHAYAN THANABODEEPATABSTRACT: The properties of starches for four varieties of sweet potato (TIS 8250, NORIN 03, POMO POlO 2 and POMO 03-2) harvested three and four months after cultivation were investigated. It was found that variety and age significantly affected the starch content (p < 0.05). In general, sweet potato aged 4 months (94.56 to 96.06070) has higher starch content than those aged 3 months (85.83 to 92.56%). The starch granules from sweet potato aged four months were significantly less swollen and yielded hot pastes of higher stability than those derived from sweet potatoes aged three months. No significant differences of amylose and phosphorus contents was observed (p Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand. Received 10 March 1990
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0.5) and the phosphorus was esterified. It is suggested that this property may be the result of associative hydrogen bondings in granules of starches from sweet potatoes that increased the order of crystallite in the granules.
