This study investigated the quality characteristics of pastes prepared by different heat treatment methods using three varieties of sweet potatoes with varying colors. The free sugars, viz., fructose, glucose, and sucrose, are normally detected in the sweet potato, with additional detection of maltose when made into a paste. The total sugar content of the paste with heat treatment methods ranged between 17.61% to 20.39% for Daeyumi, 17.29% to 22.41% for Sinjami, and 14.48% to 17.66% for Juhwangmi, with the highest values obtained after being subjected to baking. The total polyphenol and flavonoid contents of the paste were highest in the Sinjami cultivar for all heat treatment methods. The extrusion force ranged from 81.24 to 140.31 N.s. and was highest in the Daeyumi variety, and in baking. Results of the sensory evaluation test revealed that baking was the most suitable heat treatment method. Moreover, our results indicate that Sinjami is valuable as a functional sweet potato paste due to its high total polyphenol and flavonoid content.
This study was conducted to evaluate the quality characteristics of bread made from domestic early maturity and high yield wheat cultivars, namely Jokyung, Keumkang, Jopum, Sooan, and Hanbeak. The protein content of the wheat flour ranged from 12.58% in Jokyung to 14.00% in Hanbaek. The ash content varied from 0.42% in Jopum to 0.58% in Jokyung. The highest water absorption index was 2.24±0.03 in control, and the Hanbeak had the highest water solubility index of 9.69%. The starch content of the flour was the highest at 75.63% in Jokyung and the lowest at 66.60% in Hanbaek. The amylose content ranged from 23.15% to 27.97%. The mean particle size of the flour was the smallest in control, followed by the Jokyung, Sooan, Hanbeak, Jopum, Keumkang cultivars. The Keumkang bread had the highest volume at 2,185 mL, and the highest specific volume at 5.26 mL/g. The hardness of the bread was 218.53±7.39 g in control, and 306.97±21.28 g in Keumkang which was like to the control. From the above results, the Keumkang cultivar showed baking characteristics like to the control and was therefore recommended as being the best bread cultivar.
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