Studies of sugar composition and starch morphology of baked sweet potatoes (Ipomoea batatas (L.) Lam)
Journal
Journal of Food Science and Technology
Journal Volume
50
Journal Issue
6
Pages
1193-1199
Date Issued
2013-12
Author(s)
Abstract
Sugar composition of seven sweet potato cultivars was successfully analyzed. Fresh CYY95-26 sweet potatoes had the highest (8.41%) total sugar content while TNG73 had the lowest (4.5%). For these fresh sweet potatoes, maltose content was very low (0 similar to 0.39%). Because 49.92 similar to 92.43% of total sugars were sucrose, sucrose was the major sugar composition of fresh sweet potatoes. After the baking treatment, the total sugar content of baked sweet potatoes was dramatically increased due to the formation of maltose. The maltose content significantly increased from 0 similar to 0.39% to 8.81 similar to 13.97% on dry weight basis. Therefore, maltose should be included in calculating the total sugar content. Electronic micrographs of fresh sweet potato samples showed that the size of starch granules was generally less than 20 mu m. After the baking treatment, starch granules completely gelatinized.
Subjects
sweet potato
sugar
Maltose
Starch morphology
Publisher
Springer
Type
journal article