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한국식품과학회 한국식품과학회지 한국식품과학회지 제29권 제4호
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    초록·키워드

    Response surface methodology was applied to determine the optimum roasting conditions (roasting temperature and time) for the high-quality Polygonatum odoratum tea which has been roasting with a traditional means. As quality criteria of Polygonatum odoratum tea, water-soluble solids, browning color, total phenolic compounds and electron-donating ability were proportionally increased with increased temperature and time of roasting conditions up to around 145°C and 55 min, respectively, while they were decreased under the extended-roasting conditions. The optimum roasting temperature and time based on the organoleptic overall acceptability were 146°C and 52 min, respectively. On the basis of superimposed contour maps for the tea characteristics, the optimum range of roasting conditions were 135~140°C and 58~64 min. Predicted values at the optimum conditions (137°C, 60 min) were in good agreement with experimental values.

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      UCI(KEPA) : I410-ECN-0101-2013-573-001611053