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논문 기본 정보

자료유형
학술저널
저자정보
Suyong Lee (Sejong University) Sehun Moon (Seoul National University) Jae-Yong Shim (Hankyong National University) Yong-Ro Kim (Seoul National University)
저널정보
한국식품과학회 Food Science and Biotechnology Food Science and Biotechnology vol 17. no 1
발행연도
2008.2
수록면
102 - 105 (4page)

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초록· 키워드

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The freezing patterns of commercial frozen foods were characterized by using proton nuclear magnetic resonance (1H NMR) relaxometry and differential scanning calorimetry (DSC). The liquid-like components like unfrozen water were investigated as a function of temperature (10 to -40℃) and then compared with the unfrozen water content measured by DSC. The formation of ice crystals and the reduction of water in the foods during freezing were readily observed as a loss of the NMR signal intensity. The proton NMR relaxation measurement showed that the decreasing pattern of the liquid-like components varied depending on the samples even though they exhibited the same onset temperature of ice formation at around 0℃ When compared with the unfrozen water content obtained by the DSC, the NMR and DSC results could be closely correlated at the temperature above -20℃. However, the distinct divergence in the values between 2 methods was observed with further decreasing temperatures probably due to the solid glass formation which was not detected by DSC.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgments
References

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