지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Lycium chinense fruits is known to have the function of healing eye disease, enforcing liver and kidney function, and anti-aging. It is one of the most common herbal medicines in China, and has believed to have similar effect to ginseng radix. Lycium fruit is normally dried for storage and distribution, and it is boiled in water to consume as tea or extract juice. In this study, the drying conditions of lycium fruit in hot-air drier and freeze drier were investigated and the rehydration characteristics and extraction rate of functional substances of the dried products were analyzed. The optimum drying condition was 50oC hot-air drying for 48hrs. The rehydration value of dried Lycium varied widely with the drying method and the temperature of rehydration water. The rehydration rate of freeze dried lycium was 93% of original fresh lycium at 90oC for 28min, while it was only 37% for hot-air dried lycium at the same rehydration condition. The extraction rate of functional components of lycium, for example sugar, protein and betaine, also varied with the drying condition. The extraction rate of betaine was 0.74, 1.30, and 3.75 mg/g solid in 20, 50, and 90oC water for hot-air dried sample, and 1.39, 2.18, and 4.85 mg/g solid in same temperatures of water for freeze dried sample. The extraction rates of betaine in boiling water for 28min were 6.00 mg/g solid for hot-air dried sample and 7.34 mg/g solid for freeze dried sample, which were 1.5-1.6 times higher than those of infusion.
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