Browse > Article
http://dx.doi.org/10.9726/kspse.2011.15.4.005

The Evaluation for Quality Characteristics of Drying Flowering Plant by Vacuum-Freeze  

Kim, J.D. (동명대학교 공과대학 냉동공조공학과)
Publication Information
Journal of Power System Engineering / v.15, no.4, 2011 , pp. 5-10 More about this Journal
Abstract
In case of using rapid vacuum-freeze drying for high quality dry flower of flowering plant, the morphological and physiological characteristics of dry rose showed as the following. The dry ratio of about 82% presented after 1 day in case of using rapid vacuum-freeze drying and it was reached that the optimum storage water content of general dry products was 18%. The dry ratio of about 89% presented after 4 days. This result indicates very short dry time comparing with natural dry time of 12 days. Also, the morphological characteristics of flowering plant in case of vacuum-freeze drying showed similar shape with real flower. The contraction decreased about 9% comparing with real flower under dry time of 72 hours. But the contraction in case of natural dry decreased 36% and showed noticeable difference. The brightness which affects physiological characteristics of dry flowering plant showed lower values according to the dry process and chromaticity was thick. After 4 days, natural dry was thick with about 2 times comparing with vacuum-freeze drying. In case of vacuum-freeze drying, the quantity of anthocyanin and chlorophyl which affect discoloration and bleaching of dry flowering plant showed the clear difference comparing with natural dry method due to the sublimation by vacuum after rapid freeze with short initial time.
Keywords
Anthocyanin; Brightness; Flowering plant; Natural dry; Vacuum freeze dry;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Sohn, K. H., H. J. Kwon and E. Y. Kim, 2003, "Effects of drying methods on shape and color of Rosa hybrida", Korea Journal of Horticultural Science and Technology, Vol. 21, pp. 136-140.
2 Gould, K. S., K. R. Markham, R. H. Smith and J. J. Goris, 2000, "Functional role of anthocyanins in the leaves of Quintinia serrata A", Cunn., J. Exp. Bot., Vol. 51, pp. 1107-1115.   DOI   ScienceOn
3 Sohn, K. H., 1994, "Studies on the best temperatures in drying flowers with silica gel", Korea Journal of Horticultural Science and Technology, Vol. 3, pp. 45-52.
4 Im, M. H., Y. K. Yoo and Y. S. Park, 2003. "Effects of drying conditions on changes of flower color and diameter in Gerbera hybrida Korea Journal of Horticultural Science and Technology, Vol. 44, pp. 102-106.
5 농촌진흥청, 1998, "시설원예", pp. 11-33.
6 최영하, 2000, "시설원예작물 환경관리기술과 자재 개발 심포지움", pp. 13-35.
7 이영만, 1998, "시설원예 농업의 경제성과 전망", KSCS & KBS 심포지움, pp. 41-67.
8 강정일, 오세익, 1993, "시설원예농업의 실태와 시설원예 육성사업의 추진방향", 농촌경제, Vol. 16, No. 3, pp. 31-42.
9 Lee, W. Y., M. J. Yoon, C. H. Park and B. H. Kwack, 2003, "Effects of various drying methods for wild flower", Korea Journal of Horticultural Science and Technology, Vol. 21, pp. 50-56.
10 Sho, C. S., Y. J. Park, I. B. Lee and B. G. Heo, 2001, "Color and morphological characteristic of freeze-dried rose", Journal of Korea Flower Research, Vol. 9, pp. 87-90.