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Physicochemical Characteristics of Cold-Air Dried Persimmons and Traditional Dried Persimmons

냉풍건조 곶감과 천일건조 곶감의 이화학적 품질특성

  • Lee, Su-Won (Regional Innovation Center, Kyungpook National University) ;
  • Moon, Hye-Kyung (Regional Innovation Center, Kyungpook National University) ;
  • Lee, Won-Young (School of Food Science and Biotechnology, Kyungpook National University) ;
  • Kim, Jong-Kuk (Dept. of Food Science & Nutrition, Kyungpook National University)
  • Received : 2011.03.07
  • Accepted : 2011.07.29
  • Published : 2011.08.30

Abstract

This study was performed to investigate physicochemical properties of cold-air dried persimmon and traditional dried persimmons. Moisture contents and water activity were lower at cold-air dried persimmon than traditional persimmons. Crude protein and crude fat were not significant differences, Crude ash and N-free extracts of cold-air dried persimmon were, relatively, high as comparing to the traditional dried persimmons. Brix in cold-air dried persimmon was the highest. In the hunter's color values, L, a and b values of cold-air dried persimmon were lowed than traditional dried persimmons. There was not significant differences at the texture of semi-dried persimmons, but cold -air dried persimmon were relatively high than the traditional dried persimmons in hardness, gumminess, chewiness. Free sugars contents were only glucose and fructose in an sample. Free amino acids contents were seventeen sorts, glutamic acid and alanine were high in order of contents.

본 연구는 냉풍건조 곶감과 천일건조 곶감의 이화학적 품질특성을 조사하였다. 반건시 및 건시 모두 수분함량과 수분활성도에 있어서 냉풍건조 곶감이 가장 낮은 값을 나타내었다. 조단백질은 유의적인 차이가 나타났으나, 조지방은 유의적인 차이가 나타나지 않았다. 조회분과 가용성무질소물 함량은 냉풍건조 곶감에서 다소 높게 나타났다. 꽂감의 가용성 고형물 함량은 반건시의 경우 냉풍건조 반건시, 건시가 각각 40.12 $^{\circ}Brix$, 52.29 $^{\circ}Brix$로 가장 높은 값을 나타내었다. 곶감의 색도는 L값(lightness), a값(redness) 및 b값(yellowness)에서는 냉풍건조 곶감이 전통곶감에 비해 상대적으로 색에 있어서는 낮은 값을 보여주어 어두운 색을 나타내었다. 조직감을 측정한 결과 반건시의 경우 조직감에 있어서 3개 시료구에서 유의적인 차이가 거의 없었으나, 건시의 경우 냉풍건조 곶감의 수분이 상대적으로 적어 hardness, gumminess, chewiness의 값이 상대적으로 다소 높게 나타났다. 유리당은 6개 시료구 모두 fructose와 glucose만 검출되었으며 유리 아마노산은 17종 함유되어 있었고, aspartic acid, glutamic acid 및 alanine 순으로 그 함량이 많았다. 냉풍건조 곶감이 천일건조에 의해 생산되는 전통 곶감보다 위생적이며 건조조건을 자유롭게 조절할 수 있기 때문에 건조기간을 획기적으로 단축할 수 있으며 균일한 품질의 우수한 곶감생산을 할 수 있을 것으로 생각된다.

Keywords

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