Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Drying characteristics and physical properties of medicinal and edible mushrooms

약용버섯과 식용버섯의 건조방법에 따른 품질특성

  • Kim, Bo-Min (School of Food Science and Biotechnology, Kyungpook National University) ;
  • Jung, Eun-sun (School of Food Science and Biotechnology, Kyungpook National University) ;
  • Aan, Yong-hyun (School of Food Science and Biotechnology, Kyungpook National University) ;
  • Hwang, In-Wook (Department of Food Science and Nutrition, Dong-A University) ;
  • Chung, Shin-Kyo (School of Food Science and Biotechnology, Kyungpook National University)
  • Received : 2016.04.28
  • Accepted : 2016.08.04
  • Published : 2016.10.30
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Abstract

In this study, the drying characteristics of medicinal (Ganoderma lucidum, Phellinus linteus) and edible (Pleurotus eryngii, Lentinus edodes) mushrooms were investigated. Their shrinkage ratios, Hunter's color values, and rehydration ratios were evaluated. Mushrooms were cut with rectangular (1 cm) and square ($1{\times}1cm$) shapes, and dried in the room temperature and at $50^{\circ}C$ and $70^{\circ}C$ using hot-air dryer. Initial moisture contents of edible mushrooms were higher than those of medicinal mushrooms, whereas final moisture contents were vice versa. Drying rate was the highest when drying at $70^{\circ}C$ (p<0.05). Moreover the drying rate of square slices was higher than that of rectangular slices (p<0.05). The shrinkage ratios of both medicinal mushrooms and edible mushrooms were the least when drying at $50^{\circ}C$ and $70^{\circ}C$, respectively (p<0.05). The changes of color values were less in the medicinal mushrooms dried in the room temperature than in the hot-air dried medicinal mushrooms (p<0.05). However, in case of edible mushrooms, the changes of color values were less in the hot-air dried mushrooms (p<0.05). Rehydration ratios of medicinal mushrooms dried at $50^{\circ}C$ was the highest (p<0.05). In contrast, rehydration ratios of edible mushrooms was the highest when drying in the room temperature (p<0.05). Thus, the hot-air drying at $50^{\circ}C$ would be suggested as the efficient drying method for both medicinal mushrooms and edible mushrooms.

약용버섯(영지버섯, 상황버섯)과 식용버섯(새송이버섯, 표고버섯)을 장방형(1 cm)과 정방형($1{\times}1cm$)으로 절단하여 자연건조와 열풍건조($50^{\circ}C$, $70^{\circ}C$)하면서 건조특성을 조사하고 건조 시료의 수축률, 색도 및 재수화성을 조사하였다. 건조 전의 초기수분함량은 약용버섯에 비해 식용버섯이 높았으며, 건조 후 최종수분함량은 약용버섯이 높았다. 건조속도는 $70^{\circ}C$ 열풍건조가 가장 빨랐으며, 장방형절편보다 정방형절편에서 건조 속도가 빨랐다(p<0.05). 수축률은 약용버섯은 $50^{\circ}C$ 열풍건조, 식용버섯은 $70^{\circ}C$ 열풍건조가 가장 작았으며 정방형 절편이 장방형에 비해 낮았다(p<0.05). Hunter 색차계로 색도 값을 조사한 결과, 약용버섯은 자연건조구, 식용버섯은 열풍건조구가 색도 변화가 작았으며, 갈변도를 나타내는 ΔE값도 적었다(p<0.05). 재수화율은 약용버섯은 $50^{\circ}C$ 열풍건조구, 식용버섯은 자연건조구에서 높게 나타났다(p<0.05). $50^{\circ}C$ 열풍건조가 비교적 건조시간이 짧으며, 수축률이 낮고, 갈변이 적게 일어나며, 재수화율이 높아서 효율적인 것으로 사료된다.

Keywords

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