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논문 기본 정보

자료유형
학술저널
저자정보
박종우 (농촌진흥청) 김진세 (농촌진흥청) 박석호 (농촌진흥청) 최동수 (농촌진흥청) 최승렬 (농촌진흥청) 김용훈 (농촌진흥청) 이수장 (농촌진흥청) 김하윤 (농촌진흥청)
저널정보
동아시아식생활학회 동아시아식생활학회지 東아시아 食生活學會誌 第25卷 第5號
발행연도
2015.10
수록면
893 - 901 (9page)
DOI
10.17495/easdl.2015.10.25.5.893

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This study investigated the effects of thawing conditions on physiological activities and quality of peeled garlic. Peeled frozen garlic was analyzed after thawing at low temperature (4℃), room temperature (20℃), tap water (20℃), radio frequency of 27.12 MHz, and 2.45 GHz in a microwave. As a result, the time required to thaw garlic to 0℃ by various thawing methods was shortest at2.45 GHz in a microwave, followed by 20℃ tap water, radio frequency of 27.12 MHz, 20℃, and 4℃. Microwave thawing was faster than other methods, but it resulted in significant non-uniformity of heating. The hardness of peeled garlic significantly decreased upon freeze-thawing, whereas it showed improved hardness upon radio-frequency thawing. Total color difference in garlic increased upon freeze-thawing, and it was not improved by various thawing methods. Antioxidant activities were determined for DPPH radical scavenging ability, SOD-like activity, and reducing power. Total phenolic compounds and flavonoids in garlic extract were measured as 3.222±0.214 μg GAE/g and 0.149±0.03 μg QE/g, respectively. The content of total phenolic compounds was significantly reduced by 2.45 GHz microwave thawing (1.90±0.02 μg GAE/g); however, flavonoid contents were slightly reduced under freezing and thawing conditions. The DPPH radical scavenging ability of garlic extracts was not affected by thawing methods; however, SOD-like activity and reducing power were slightly reduced by freeze-thawing. These results indicate that physiological activities were not improved by radio-frequency thawing; however, thawing time and maintain hardness were reduced compared with conventional thawing methods.

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