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논문 기본 정보

자료유형
학술저널
저자정보
이상윤 (건국대학교) 최수영 (농촌진흥청 국립농업과학원) 한혜민 (농촌진흥청) 유선미 (농촌진흥청) 최미정 (건국대학교)
저널정보
한국산업식품공학회 산업식품공학 산업식품공학 제19권 제3호
발행연도
2015.1
수록면
226 - 234 (9page)

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The pre-treatment conditions of butterbur stem such as blanching, freezing, and thawing were studied to optimize it for producing frozen butterbur stem to improve its storage ability. Butterbur stems were hot water blanched at 100oC for 3, 5, or 7 min respectively and then soaked in cold water. After peeling out and cutting into blocks (4.5×1.0×0.5 cm), butterbur stems were air-dried for 5, 10, or 15 min respectively. Dried samples were analyzed for their physicochemical properties. With blanching, the hardness value increased from 2.91 kg to 3.64 kg (p>0.05); however, adhesiveness decreased drastically after 5 min of blanching (p<0.05), which changed to a crisp texture. In addition, considering other physicochemical properties, it was assumed that 5-min blanching was optimal pre-treatment to maintain the original quality of butterbur stem for freezing. Five-minute blanched butterbur stems were airdried 5 min, frozen and thawed with several methods, and analyzed for their properties. Considering the thawing loss, hardness, and color change, the fastest freezing and thawing method had the lowest changes on the quality of frozen butterbur stem. Therefore, to produce frozen butterbur stem, it was assumed that immersion freezing and running water or room temperature thawing (25oC) were the best process.

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