Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Pre-heating Conditions on Extraction Yield of Phelinus linteus Tea

가열 전처리 조건이 상황버섯 차의 추출수율에 미치는 영향

  • Park, Min-Kyung (Dept. of Human Nutrition and Food Science, Chungwoon University) ;
  • Kim, Cherl-Hyun (Dept. of Animal Resource & Science, Dankook University)
  • 박민경 (청운대학교 식품영양학과) ;
  • 김철현 (단국대학교 생명자원과학대학)
  • Published : 2008.05.31
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Abstract

In this study, the optimum pre-heating condition was investigated to improve water extraction yield of Phelinus linteus tea. Pre-heating was carried out using drying oven or hot plate at different temperatures and times, and extraction yield was estimated by measuring optical density at 370 nm and soluble solid content. The highest optical density and soluble solid content of Phelinus linteus tea were observed when pre-heated at $70{\sim}80^{\circ}C$ for 30 minutes in drying oven. Pre-heating in drying oven resulted in also faster color changes of Phelinus linteus tea at lower temperature. According to the organoleptic evaluation, pre-heated Phelinus linteus tea in drying oven at $70{\sim}80^{\circ}C$ for 30 minutes was preferred compared to the non-treated. In conclusion, pre-heating in drying oven at $70{\sim}80^{\circ}C$ for 30 minutes was found to be the most efficient conditions to increase extraction yield of Phelinus linteus tea.

본 연구에서는 지상재배 방법으로 대량생산이 가능해진 상황버섯을 차로 개발하기 위하여 용출성을 증대시킬 수 있는 가열 전처리 조건을 구명하고자 하였다. 이를 위해, 자연 건조한 상황버섯을 건조오븐과 hot plate에서 온도와 시간을 달리하여 가열 전처리하고 분쇄한 후 일정량을 티백에 넣어 열수 추출하고 용출성 변화를 흡광도, 건조 고형분 함량, 색도 등을 측정하여 알아보았다. 건조오븐에서 가열할 경우, $70^{\circ}C{\sim}80^{\circ}C$에서 30분 가열 전 처리한 시료의 흡광도 및 건조 고형분량이 가장 크게 증가하였다. 반면, hot plate를 이용할 경우, 건조오븐에서 가열 전 처리한 시료의 증가폭에는 미치지 못하지만 $90^{\circ}C$에서 20분 가열 전 처리한 시료의 흡광도 및 건조 고형분량이 크게 증가하였다. 상황버섯 차의 색도변화는 가열시간이 길어질수록 밝기와 적색도가 감소하고 황색도가 상승하였으며 건조오븐에서의 가열 전 처리가 hotplate에서와 비교하여 상대적으로 낮은 온도에서 먼저 나타난다. 건조오븐을 이용하여 가열 전 처리한 시료를 대상으로 관능검사를 실시한 결과 $70^{\circ}C$ 및 $80^{\circ}C$에서 30분 가열 전 처리한 상황버섯 차가 가열처리 하지 않은 것과 비교하여 종합적 기호도가 높게 나타났다. 결론적으로 건조오븐을 이용하여 $70{\sim}80^{\circ}C$에서 30분 가열 전 처리하는 것이 상황버섯 차의 용출성 증대 및 기호도 측면에서 가장 효율적인 방법으로 사료된다. 또한 일정기간 보관하면서 탁도를 측정한 결과 상황버섯 차가 보리차 및 옥수수차와 비교하여 보존성이 좋은 것으로 나타났다.

Keywords

References

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