Physicochemical, Microbial, Rheological, and Sensory Properties of Yogurt Added with Yuza Pectin Extract

유자펙틴 추출물을 첨가한 요구르트의 이화학적, 미생물학적, 유변학적 및 관능적 품질 특성

  • Yoon, Mi-Ra (Department of Food and Nutrition, Kyung Hee University) ;
  • Seo, Jeong-Yun (Department of Food and Nutrition, Kyung Hee University) ;
  • Ryu, Ga-Eun (Department of Food and Nutrition, Kyung Hee University) ;
  • Kim, Yeon-Ho (Department of Food and Nutrition, Kyung Hee University) ;
  • Seo, Moon-Cho (Department of Food and Nutrition, Kyung Hee University) ;
  • Chang, Yoon Hyuk (Department of Food and Nutrition, Kyung Hee University)
  • 윤미라 (경희대학교 식품영양학과) ;
  • 서정윤 (경희대학교 식품영양학과) ;
  • 유가은 (경희대학교 식품영양학과) ;
  • 김연호 (경희대학교 식품영양학과) ;
  • 서문초 (경희대학교 식품영양학과) ;
  • 장윤혁 (경희대학교 식품영양학과)
  • Received : 2015.11.23
  • Accepted : 2016.02.23
  • Published : 2016.04.30


This study investigated the effects of Yuza pectin extract (0, 0.1, 0.15, and 0.2%, w/v) on the physicochemical, microbial, rheological, and sensory properties of yogurt. Pectin extract was extracted from Yuza peel by using citrate after juicing the flesh. The total sugar content of Yuza pectin was 89.07%. The pH of Yuza pectin extract-added yogurt was 4.43. All Yuza pectin extract-added yogurt samples showed shear-thinning flow behaviors (n=0.33~0.44). The values for apparent viscosity ($0.34{\sim}0.47Pa{\cdot}s$), consistency index ($4.48{\sim}10.25Pa{\cdot}s^n$), yield stress (6.56~17.61 Pa), storage modulus (47.96~75.21 Pa), and loss modulus (19.79~26.06 Pa) for 0.1~0.2% (w/v) Yuza pectin extract-added yogurt were considerably higher than those of the control. These result indicated that Yuza pectin extract could enhance steady and dynamic shear rheological properties of yogurt. The sensory scores of Yuza pectin extract-added yogurt were higher than those of the control.


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