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비가열, 재래식 및 통전가열한 오디주스의 품질 평가
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  • 비가열, 재래식 및 통전가열한 오디주스의 품질 평가
  • Evaluation on the Quality of Fresh, Conventionally Heated and Ohmically Heated Mulberry Fruit Juice
저자명
양지원,한대석,이창호,박성진,김영언,Yang. Ji-Won,Han. Dae-Seok,Lee. Chang-Ho,Park. Sung-Jin,Kim. Young-Eon
간행물명
東아시아食生活學會誌
권/호정보
2014년|24권 1호|pp.80-91 (12 pages)
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동아시아식생활학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The aim of this study was to establish the superiority of ohmic heating over conventional heating for the sterilization of mulberry juice. Heat treatment of fresh juice significantly reduced the concentration of soluble solids, lowered the pH, and lowered the reducing sugar content (p<0.01). Color measurements showed decreases in the L and a values and increases in the b, H and C values after heat treatment, although the total color differences were smaller after ohmic heating than after conventional heating of fresh juice. The antioxidant capacities, such as reducing power, FRAP, and DPPH, decreased in the order of fresh juice, ohmically heated juice and conventionally heated juice. Furthermore, the anthocyanin, flovonoid, and total antioxidant capacities of the juices significantly decreased in the same order. Sensory evaluations showed no difference between fresh and ohmically heated mulberry fruit juice excluding off-flavor, whereas conventionally heated juice received significantly lower evaluations. The microbial counts were zero in the juice after either heat treatment. Thus, ohmic heat treatment can be effectively used to sterilize fresh mulberry juice to obtain good shelf life with minimal physicochemical, color, antioxidant and sensory deterioration.