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포장 및 냉,해동 방법이 고구마 줄기의 품질 특성에 미치는 영향
최희정 ( Hee Jeong Choi ),이상윤 ( Sangyoon Lee ),이지선 ( Jiseon Lee ),김수진 ( Soojin Kim ),서재희 ( Jae Hee Seo ),이중규 ( Junggyu Lee ),김하윤 ( Hayun Kim ),신혜림 ( Hyerim Shin ),조선경 ( Sun Kyung Cho ),신민정 ( Min Jung Shi 한국산업식품공학회 2016 산업 식품공학 Vol.20 No.2
Food freezing preservation is an important process due to its high quality and long shelf-life. In order to improve the quality of frozen sweet potato stem, the freezing rate, thawing, and packaging method was optimized by the determination of physical properties. There was no significant difference among the treatment of freezing rate. Further, the drip loss of sweet potato stem was higher at a relatively fast freezing rate (immersion freezing) than at slow freezing rate (natural convection freezing at -20 or -40oC). For the comparison of packaging methods, the aircontaining packaged sweet potato stem had the lowest significant differences from the result of color, pH, and hardness. From the result of the drip loss, the high frequency and microwave using thawing samples were more effective than room temperature and water thawing. Therefore, fast freezing and thawing rate with air-containing package were recommended to obtain the better quality of sweet potato stem.