Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Dehydration and Drying Characteristics of Gingers Using Dehydrating Agent by Dextrose Equivalent and Molecular Weight Condition

포도당 당량과 분자량 조건별 탈수제를 적용한 생강의 탈수와 건조 특성

  • Received : 2010.06.17
  • Accepted : 2010.11.19
  • Published : 2010.12.30
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Abstract

We examined variations in ginger dehydration and recovery rate upon use of dextrose of different equivalence values. The dehydration rate varied with dextrose equivalent and the dehydration rate increased as the equivalence value increased. Both dehydration and recovery rates varied with dextrose molecular weight. Moisture content was lowest in samples prepared by freeze-drying, and neither dextrose equivalent nor molecular weight affected moisture level. Upon color analysis, ginger dried using dextrose varying in equivalence and molecular weight was similar in color to the original material, unlike ginger dried by other methods. Hot-air-dried ginger scored lowest in all sensory tests, compared with ginger prepared by molecular press dehydration using dextrose varying in equivalence and molecular weight. With respect to the appearance of ginger, freeze-dried samples were optimal, but molecular press dehydration yielded samples that scored best upon overall evaluation. When all quality evaluation items were taken together, molecular press dehydration resulted in a better quality product than the older hot-air or freeze-drying methods.

포도당 당량에 의한 탈수율과 복원율의 변화에서는 포도당 당량에 차이에 따라 탈수율은 달라졌으며 당량이 커질수록 탈수율과 복원율이 증가하는 경향을 나타내었다. 분자량에 의한 탈수율과 복원율에 변화에서는 분자량이 다른 탈수제 차이에 따라 탈수율과 복원율이 달라졌으며 분자량이 커질수록 포도당 당량과 같이 뚜렷하게 탈수율이 증가하고 복원율이 높게 나타났다. 수분함량은 동결건조한 시료가 가장 낮았으며 당량과 분자량에 따른 차이는 나타나지 않았다. 색도에서는 D.E.와 분자량(PEG)을 적용한 생강이 다른 건조방법의 색도보다 원물과 유사하였다. 관능평가를 통하여 포도당 당량과 분자량별 탈수제를 적용한 분자압축 탈수건조한 생강시료를 비교 하였을 때 모든 항목에서 열풍 건조가 가장 낮았고 외관의 경우에서는 동결건조한 시료가 우수하였지만 전체적인 평가에 있어서 분자압축 탈수건조한 생강이 가장 우수하였다. 이 처럼 모든 품질평가 항목의 결과를 통하여 분자압축 탈수건조가 이전에 열풍건조와 동결건조보다 품질이 우수하였다.

Keywords

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