Selected Physicochemical and Consumer Preference Characteristics of Baikseolgi with Pomegranate Concentrate

석류 농축액을 첨가한 백설기의 품질 특성

The effects of different ingredient formulations on physicochemical qualities and consumer preferences were investigated using Baikseolgi incorporated with pomegranate concentrate (PC), a healthy food ingredient, as a model system. PC was incorporated into the formulation at five different amounts [0%, 1.6%, 3.3%, 5%, and 6.6% (w/w)] by replacing the equivalent amount of water added. After appropriate mixing, rice cakes were steamed and quality attributes were evaluated after cooling. The pH decreased while moisture content increased significantly with increased PC substitution (P<0.05). Lightness decreased significantly from 82.33 to 65.09 with higher incorporation of PC (P<0.05), indicating that the color of Baikseolgi became darker. Redness and yellowness, on the other hand, increased significantly (P<0.05). Hardness gradually increased as the PC content increased in the formulation (P<0.05). In addition, DPPH and ABTS radical scavenging activities increased significantly (P<0.05), and they were well correlated. The overall consumer acceptance results indicate that incorporation of 1.6% PC in the formulation of Baikseolgi is recommended to take advantage of the health benefits of PC without sacrificing quality acceptance by consumers.

석류 농축액의 첨가량을 0~6.6%로 달리하여 백설기를 제조한 후 물리화학적 품질, 항산화 특성 및 소비자 기호도를 비교하였다. pH는 6.35~5.61 범위로 석류 농축액의 첨가량이 증가할수록 유의적으로 감소하였고(P<0.05) 수분함량 또한 유의적으로 감소하였다(P<0.05). 한편 명도($L^*$)는 농축액의 첨가량이 많아질수록 유의적으로 감소하였지만 (P<0.05) 적색도($a^*$)와 황색도($b^*$)는 석류 농축액의 첨가량이 많아질수록 유의적으로 증가하였다(P<0.05). 경도는 0.18~0.34 kgf로 대조군과 1.6%, 3.3~5% 첨가군 내에서 유의적 차이는 발견되지 않았으나(P>0.05) 전반적으로 증가하는 경향을 나타내었으며, 전자공여능과 ABTS radical 소거능 활성은 석류 농축액의 첨가량이 증가할수록 유의적으로 증가하였다(P<0.05). 소비자 검사 결과 농축액을 첨가한 백설기가 그렇지 않은 시료에 비해 대체적으로 낮은 평가를 받았으나 전반적인 소비자 기호도와 석류 농축액의 건강기능성 효과 등을 고려하면 최적 첨가 농도는 1.6%가 적절한 것으로 판단된다.