일시에 대량 수확되는 양파의 소비를 촉진시키고 식품의 원 부재료로서의 이용성을 제고하기 위하여 열풍건조, 진공건조, 동결건조 중의 품질특성 변화를 조사하였다. 수분함량은 진공건조가 건조 5일째에 수분함량 5.23%를 유지하여 가장 빨리 분말화가 가능하였다. 또한 중량감소율은 동결건조가 건조 7일째 중량감소율이 90.0%를 나타내었다. 갈색도는 동결건조가 건조 7일째에 흡광도 1.173으로 가장 낮은 갈색도 변화를 보였다. 색도 중 백색도(L

This study investigated changes in physicochemical properties of onion powders during various drying conditions. The moisture content during vacuum drying at remained at 5.23% for 5 days of drying, and it was possible to quickly obtain day powder Weight reduction upon vacuum drying was 90% after 7 days. The large change in browning caused by vacuum freeze drying was lowest () after 7 days of drying. The content of vitamin C increased with vacuum freeze drying. The major free sugars were fructose, glucose and sucrose. Of organic acids, citric acid was prominent and, after vacuum freeze drying, showed a high value of 1,965 mg/100g. Free amino acids noted were L-arginine, , L-alanine and L-threonine. In summary, vacuum freeze drying at is optimal.

• 강난숙
• 김준한
• 김종국