초록
볶은 원두커피로부터 얻은 갈색 추출물의 항산화력에 대한 볶음시간과 추출온도의 영향을 시험하였다. 볶은 원두커피의 갈색추출물을 돈지에 첨가하였을 때 항산화력을 나타냈으며, 그 항산화력은 원두의 품종에 따라 큰 차이가 없었으나 Colombia 원두가 Robusta 원두 또는 Brazil 원두에 비해 강하였다. Colombia 원두를 $210^{\circ}C$에서 볶음 시간을 달리하였을 때 갈색추출물의 갈색도와 항산화력은 볶음시간 16분까지는 함께 증가하였으나, 그 후는 갈색도는 계속 증가하나 항산화력은 감소하는 경향이었다. 이것은 볶음에 의해 생성된 항산화성 갈색물질이 가열에 의해 분해되기 때문인 것으로 추측되었다. 볶은 원두커피를 $180^{\circ}C$까지 추출온도를 달리하여 갈색도와 항산화력을 측정한 결과 추출온도는 갈색도와 항산화력에 영향을 주지 못하였다.
Antioxidative activities of brown materials extracted from the three kinds of roasted coffee beans by water were examined. Antioxidative activity was assessed by the AOM at $120^{\circ}C$ and the oven test at $60^{\circ}C$ on lard. The brown materials of them showed the considerable antioxiant activity. The brown materials of Colombian coffee beans were more effective than those of Robusta or Brazil beans. The antioxidative activities of brown materials from Colombian coffee beans roasted at $210^{\circ}C$ increased in proportion to the browning intensity up to 16 minutes of roasting time, but the antioxidant activities of the brown materials upon further roasting time decreased gradually. In changes of extraction temperature from $30^{\circ}C\;to\;180^{\circ}C$ on the coffee beans roasted at $210^{\circ}C$ for 16 minutes, the antioxidative activities of brown materials did not change as the extraction temperature increased to $180^{\circ}C$. The antioxidative activities of the coffee extracts were thought to be caused by browning reaction materials produced during the roasting process only.