Effect of thermal processing on sugar content, color and texture of sweet corn cultivars
1992
Ratchada Tangwongchai
Three sweet corn cultivars, i.e., HSSW(HS)C2F2 ("C2F2"), Hybrid 27127 ("HB"), HSSW(HS)no.11 ("11"), were examined. The ear and kernel size of "C2F2" were about the same as "HB" while "11" exhibited smaller dimensions. "C2F2" cultivar had firmer texture, higher carotene content and deeper color than "HB", but lower in total sugar. "11" cultivar had a higher L value, hue angle, sugar and moisture content, but lower in alcohol insoluble solids (AIS) and carotene content than the others. Whole kernel in brine with sterilizing value (Fo) of 4, 9 and 12 min at 121 deg C resulted in broken heating curve pattern of heat penetration data. After processed, the AIS of "HB" decreased, while there was no significant change in the others. All cultivars had increases in moisture content and chroma value, but had decreases in firmness, total sugar, reducing sugar,carotene content and L value. "HB" cultivar exhibited the lowest reduction in firmness, but the highest reduction in carotene (ca. 60 percent) where as "11" had the lowest sugar reduction. Within each cultivar, different level of Fo caused significant decreases in firmness of all tested cultivars, but no significant differences were found in chemical compositions. Microscopic examination of pericarps showed "11" was the most susceptible cultivar to heat degradation while "HB" was the most resistant cultivar. Sensory evaluation by trained panels indicated the tender texture as Fo increased. The panelists could not differentiate color differences between cultivars, but could detect the deeper color due to thermal process in all cultivars. Hedonic scoring by untrained panels found that the overall acceptance of "C2F2" was siginificant lower than the others at Fo = 4 and 9 min, but not at Fo = 12 min.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Kasetsart University
Découvrez la collection de ce fournisseur de données dans AGRIS