Physicochemical and Organoleptic Qualities of Sliced-dried Persimmons as Affected by Drying Methods

건조방법을 달리한 감말랭이의 이화학적 및 관능적 품질 특성

  • Kim, Yeon-Joo (Department of Food Science and Technology, Kyungpook National University) ;
  • Lee, Su-Jin (Department of Food Science and Technology, Kyungpook National University) ;
  • Kim, Mi-Yeung (Department of Food Science and Technology, Kyungpook National University) ;
  • Kim, Gui-Ran (Department of Food Science and Technology, Kyungpook National University) ;
  • Chung, Hun-Sik (Food and Bioindustry Institute, Kyungpook National University) ;
  • Park, Hyun-Ju (Cheongdo Agricultural Technology Center) ;
  • Kim, Mi-Ok (Department of Health and Diet, Daegu Health College) ;
  • Kwon, Joong-Ho (Department of Food Science and Technology, Kyungpook National University)
  • 김연주 (경북대학교 식품공학과) ;
  • 이수진 (경북대학교 식품공학과) ;
  • 김미영 (경북대학교 식품공학과) ;
  • 김귀란 (경북대학교 식품공학과) ;
  • 정헌식 (경북대학교 식품생물산업연구소) ;
  • 박현주 (청도군 농업기술센터) ;
  • 김미옥 (대구보건대학 건강다이어트과) ;
  • 권중호 (경북대학교 식품공학과)
  • Published : 2009.02.28


The effects of drying methods (hot air, cold air, vacuum, and infrared drying) on physicochemical and organoleptic qualities of sliced-dried persimmons (Diospyros kaki Thumb. cv. Cheungdobansi) were investigated. The weight of the sliceddried persimmons ranged from 9.30 to 12.01 g, the length from 3.55 to 4.06 cm, the width and thickness were from 3.17 to 3.73 cm and 1.82 to 2.04 cm, respectively. Hot air drying resulted in the highest hardness value as well as Hunter's L, a, and b values. Infrared drying showed the lowest L value and vacuum drying revealed the lowest a and b values. Moisture contents of the sliced-dried persimmons ranged from 38.04 to 46.41%, and soluble solid contents were 42.96-$48.44^{\circ}Bx$. The phenolic compounds and DPPH radical scavenging activity were high for infrared and vacuum drying methods, and all the sliced-dried persimmons showed relatively high antioxidant activities. The sensory evaluation results indicated that the organoleptic scores for the overall preference were high in the order of vacuum > infrared > hot air > cold air drying. These results suggest that the drying methods affected the qualities of the sliced-dried persimmons, showing that vacuum drying is the mast effective among the methods tested for manufacturing the high-quality sliced-dried persimmons.


sliced-dried persimmons;quality;drying methods


  1. The Korean Society of Postharvest Science & Technology of Agricultural Products. Handbook of Postharvest Technology for Agricultural Products. Daegu, Korea. pp. 495-527 (1999)
  2. SAS Institute, Inc. SAS User's Guide. Statistical Analysis Systems Institute, Cary, NC, USA (2001)
  3. Kim HK, Lee BY, Shin DB, Kwon JH. Effect of roasting conditions on physicochemical characteristics and volatile flavor components of chicory roots. Korean J. Food Sci. Technol. 30: 1279-1284 (1998)
  4. Bartley IM, Knee M. The chemistry of textural changes in fruit during storage. Food Chem. 9: 47-59 (1982)
  5. Yang HS, Lee YC. Changes in physico-chemical properties of soft persimmon and puree during frozen storage. Korean J. Food Sci. Technol. 32: 335-340 (2000)
  6. Krokida M, Maroulis Z. Quality changes druing drying of food materials. pp.61-106. In: Drying Technology in Agriculture and Food Sciences, Mujumdar AS (ed). Science Publishers Inc., Enfield, NH, USA (2000)
  7. Kim SD, Do JH, Oh HJ. Antioxidant activity of Panax ginseng browning products. J. Korean Agric. Chem. Soc. 24: 161-166 (1981)
  8. Singleton VL, Rossi JA. Colorimetry of total phenolics with phosphomolybdic-phosphotungstic acid regents. Am. J. Enol. Viticulut.16: 144-158 (1965)
  9. Tsuji M, Komiyama Y. Influences of the sulfur amount on quality, chemical components, and alcohol dehydrogenase and invertase activities in sulfur fumigated astringent persimmon fruit during sun-drying. J. Jpn. Soc. Food Sci. Technol. 35: 678-683 (1988)
  10. Goupy P, Amiot MJ, Richard-forget F, Duprat F, Aubert S, Nicolas J. Enzymatic browning of model solutions and apple phenolic extracts by apple polyphenoloxidase. J. Food Sci. 60: 497-501 (1995)
  11. Sciancalepore V. Enzymatic browning in five olive varieties. J. Food Sci. 50: 1194-1195 (1985)
  12. Yu TJ. Food Carte. Parkyoung Publishing Co., Seoul, Korea. pp.129-132 (1976)
  13. Roh YK, Jang SH, Park SH, Byun HS, Sung JJ. Analysis of distribution properties on astringent persimmons (Diospyros kaki L.). Korean J. Postharv. Sci. Technol. 6: 184-187 (1999)
  14. Chung SK, Chung YY, Jeong WS. Studies on the browning inhibition of yam (Dioscorea aimadoimo) during hot air dehydration. Agric. Chem. Biotechnol. 39: 384-388 (1996)
  15. Kim JK, Kang WW, Oh SL, Kim JH Han JH, Moon HK, Choi JU. Comparison of quality characteristics on traditional dried persimmons from various regions. J. Korean Soc. Food Sci. Nutr. 33: 140-145 (2004)
  16. Hamachi F, Tsuneto M, Morita A. Causes and control of black stain on the fruit skin of Japanese persimmon II. Agr. Hort. 49:653-655 (1974)
  17. Blois MS. Antioxidant determination by the use of a stable freeradical. Nature 181: 1199-1204 (1958)
  18. Cho DR. Variation tendency and enlargement scheme of market for dried persimmons in Korea. Korean Food Marketing Res. 24:131-148 (2007)
  19. Moon KD, Kim JK, Sohn TH. Quality changes in dried persimmons processed by different pretreatment and drying method. Korean J. Diet. Culture 8: 331-335 (1993)
  20. Kim JG, Kang UW, Oh SL, Kim JH, Han JH, Mun HG, Choi JU. Comparison of quality characteristics on traditional dried persimmons from various regions. J. Korean Soc. Food Sci. Nutr. 33:140-145 (2004)