Quality Properties of Gangjung Added with Detoxified Stem Bark of Rhus verniciflua (RVSB) Extract during Acceleration Storage

무독화 옻 추출물 첨가 강정의 가온저장 중 품질 특성

  • Kim, Kyung-Mi (Rural Resources Development Institute, National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Tae-Young (Rural Resources Development Institute, National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Myung-Kon (Department of Industrial Crop Product & Processing, Iksan National College) ;
  • Kim, Haeng-Ran (Rural Resources Development Institute, National Institute of Agricultural Science and Technology, RDA)
  • 김경미 (농업과학기술원 농촌자원개발연구소) ;
  • 김태영 (농업과학기술원 농촌자원개발연구소) ;
  • 김명곤 (익산대학 특용작물가공과) ;
  • 김행란 (농업과학기술원 농촌자원개발연구소)
  • Published : 2007.08.31


The quality characteristics of Gangjung added with detoxified Rhus verniciflua stem bark (RVSB) extract, as well as the changes that occurred in the product during accelerated storage ($60^{\circ}C$, 24 hr), were investigated. The expansion rate of Gangjung was not significantly different (p < 0.05). The L-value of the Gangjung with added detoxified RVSB extract was higher than the control, while the a-value decreased as the addition levels of the detoxified RVSB extract increased. The b-value was highest for the Gangjung prepared with 7% (w/w) detoxified RVSB extract. The moisture content of the Gangjung decreased as the storage period increased, but the addition of detoxified RVSB extract (p < 0.05) did not significantly change this effect. We found no significant difference in the hardness of the Gangjung within the concentration range of 0-7% (w/w) detoxified RVSB extract, and the peak number slightly decreased as the storage period increased. After 16 hr of storage, the acid value was significantly lower for the Gangjung containing detoxified RVSB extract at concentration between 5-7%. Furthermore, after 12 hr of accelerated storage, peroxide and TBA values significantly decreased with additions of detoxified RVSB extract that were over 3% (w/w). These results suggest that the physical texture of Gangjung did not improve by the addition of detoxified RVSB extract; however, its rate of lipid oxidation was reduced.


Gangjung;detoxified Rhus verniciflua stem bark;acceleration storage


  1. Park YJ, Chun HS, Kim SS, Lee JM, Kim KH. Effect of nitrogen gas packing and ${\gamma}$-oryzanol treatment on the shelf life of yugwa (Korean traditional snack). Korean J. Food Sci. Technol. 32: 317-322 (2000)
  2. Bae HS, Lee YK, Kim SD. Quality characteristics of yugwa with citrus peel powder. J. East Asian Soc. Diet. Life 12: 388-396 (2002)
  3. Shin MK. Limsangbonchohak. Namsadang, Seoul, Korea. pp. 460-461 (1986)
  4. Shin AJ, Kim DH. Studies on thermal oxidation of soybean oil. I. Changes in some chemical and physical properties of a soybean oil during thermal oxidation. Korean J. Food Sci. Technol. 14: 257-264 (1982)
  5. Choe EO, Lee YS, Choi SB. Effects of antioxidants in frying oil on the flavor compound formation in the ramyeon during storage. Korean J. Food Sci. Technol. 25: 444-448 (1989)
  6. Kum JS, Lee YH, Ahn YS, Kim WJ. Effects of antioxidants on self-life of yugwa. Korean J. Food Sci. Technol. 33: 720-727 (2001)
  7. Shin DH, Choi U. Shelf-life extension of yugwa (oil puffed rice cake) by $O_2$ preventive packing. Korean J. Food Sci. Technol. 25: 243-246 (1993)
  8. Lee YH, Kum JS, Ahn YS, Kim WJ. Effects of packing material and oxygen absorbant on quality properties of yugwa. Korean J. Food Sci. Technol. 33: 728-736 (2001)
  9. Kim MJ, Hyun JO. Genetic variation in urushiol components of Rhus verniciflua stokes. Korean J. Breed 29: 115-123 (1997)
  10. Chun HJ. Studies on optimum conditions for experimental procedure of yugwa and mechanism of steeping glutinous rice. PhD thesis, Yonsei University, Seoul, Korea (1993)
  11. Park GS, Lee GS, Shin YJ. Sensory and mechanical characteristics of yugwa added safflower seed powder. J. Korean Soc Food Sci Nutr. 30: 1088-1094 (2001)
  12. Lee HS, Lee SR. Carbohydrate characteristics and storage stability of Korean confection gangjeong and dashik. Korean J. Food Sci. Technol. 18: 421-426 (1986)
  13. Kim EM, Kim HY. A study on setting the shelf life of commercial Korean traditional cookies: Rice yugwa, Sesame yugwaa, yugwa. Korean J. Food Cook. Sci. 17: 229-236 (2001)
  14. Buckkingham J. Dictionary of Natural Products. Chapman and Hal. p. 761 (1994)
  15. Lee SA, Kim CS, Kim HI. Studies on the drying methods of gangjung pellets. Korean J. Soc. Food Sci.16: 47-56 (2000)
  16. Lim KR, Lee KH, Kwak EJ, Lee YS. Quality characteristics of yugwa base and popped rice for ssalyeotgangjeong popped with salt during storage. Korean J. Food Cook. Sci. 20: 462-467 (2004)
  17. Shin DH, Kim Mk, Chung TK, Lee HY. Self-life study of yugwa (Korean traditional puffed rice snack) and substitution of puffing medium to air. Korean J. Food Sci. Technol. 22: 266-271 (1990)
  18. Kim MK, Yoon S, Choi HS, Park HS. Biological detoxification of urushiol containing stem bark of laquer tree (Rhus verniciflua Stokes) by mushroom species and their biological activity. pp. 126-200. In: Investigation on the Production of Functional Alcoholic Beverages and Intermediate Food Material Used by Rice and Special Products of Each District. Rural Development Administration, Suwon, Korea (2007)
  19. Baik EY, Lee HS, Lee KS, Lee JW, Kim HR, Cho MS, Kim KO. Physicochemical and sensory characteristics of gangjung containing sorbitol during storage. Korean J. Food Culture 22: 115-126 (2007)
  20. AOAC. Official Method of Analysis of AOAC Intl. 17th ed. Method 920.39, 969.17, 965.33. Association of Official Analytical Chemists, Gaithersbrug, MD. USA (2000)
  21. Kim JS, Kim TY, Kim SB. Evaluation of the storage characteristics of gangjeong added with gromwell extracts. J. Korean Soc Food Sci Nutr. 35: 791-800 (2006) https://doi.org/10.3746/jkfn.2006.35.6.791
  22. Chun HS, Lee MK, Kim HY, Kim HJ, Cho YJ, Ku KH, Park DJ, Lee SJ. Development of microgial and enzyme additives to improve flavor and to shorten steeping process for yugwa production. GA0385-023. Ministry of Agriculture and Forestry, Seoul, Korea (2003)
  23. Kim DH. Food Chemistry. Tamgudang, Seoul, Korea. pp. 543- 582 (1988)
  24. Han JS. A study on cookery characteristics of Korean cakes (on the yugwa). Korean J. Food Nutr. 11: 37-41 (1982)
  25. SAS. SAS User's Guide. Statistical Analysis Systems Institute Inc., Cary, NC, USA (1999)
  26. Lee SK, Back NH, Shon JS. Studies of gangjung (I)-Effect of dried Insam on the lipid oxidation and sensory evaluation of gangjung. J. Food Hyg. Saf. 15: 334-339 (2000)
  27. Kim HS, Kim SN. Effects of addition of green tea powder and Angelica keiskei powder on the quality characteristics of yugwa. Korean J. Food Cook. Sci. 17: 246-254 (2001)
  28. Lee SK, Kang SM, Kim YS, Kang CG. Quality composition of emulsion-type sausages made from Rhus verniciflua stokes fed pork and extract. Korean J. Food Sci. Ani. Res. 25: 210-217 (2005)
  29. Kim HR, Chang CM, Yoo SM, Kim JS. Study on improvement acceptance and storage of traditional yugwa (gangjung). pp. 440- 466. In: Report of Rural Life Science Research. Sangloksu, Suwon, Korea (1999)
  30. Choi JY. The quality properties of yugwa added with extracts of green tea and black tea. MS thesis, Sunchon National University, Sunchon, Korea (2005)