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냉동조건에 따른 연근의 품질 변화

Quality changes in the lotus root frozen under different conditions

  • Park, Seung-Jong (Department of Food Science and Technology, Chungnam National University) ;
  • Song, Kyung Bin (Department of Food Science and Technology, Chungnam National University)
  • 투고 : 2014.09.11
  • 심사 : 2014.11.10
  • 발행 : 2015.02.28

초록

본 연구는 냉동연근의 최적 제조 공정을 위하여 수행하였다. 냉동 전처리로 blanching 하고, -20, -70, $-196^{\circ}C$ 각각 다른 냉동온도에서 동결한 냉동연근의 품질을 측정하였다. 최적 blanching 조건은 미생물 수, 물성, 총 페놀 함량, 관능평가 등의 결과를 바탕으로, $100^{\circ}C$에서 5분간 처리로 설정하였다. 여러 냉동조건에서 동결한 연근의 SEM 사진을 비교한 결과, $-20^{\circ}C$에서 동결한 연근의 조직이 가장 많이 파괴되었고 $-70^{\circ}C$에서 동결한 연근의 조직 단면 구조가 대조구와 가장 유사하였다. 항산화능은 동결 시 감소하는 경향을 나타냈고, 처리구간에 유의적인(p<0.05) 차이는 없었다. 총 페놀 함량은 모든 냉동연근에서 감소하는 경향을 보였는데 $-20^{\circ}C$에서 가장 낮았고, drip loss 또한 $-20^{\circ}C$에서 3.73%로 가장 높았다. 따라서 본 연구 결과, $-20^{\circ}C$에서의 일반적인 냉동보다는 gas nitrogen convection chamber에서 의 $-70^{\circ}C$로 동결하는 것이 고품질의 냉동연근을 생산할 수 있는 최적 냉동방법이라고 판단된다.

This study was performed to optimize the preparation of frozen lotus roots. Prior to freezing, an optimal blanching condition at $100^{\circ}C$ for 5 min was established, based on the microbial growth, texture, total phenolic content (TPC), and sensory evaluation results. The blanched samples were then frozen under various freezing conditions ($-20^{\circ}C$ in a freezer for 2 hr, $-70^{\circ}C$ in a gas nitrogen convection chamber for 7 min, and $-196^{\circ}C$ in liquid nitrogen for 20 sec), and their qualities after thawing were determined. The scanning electron microscopic analysis indicated that the microstructure of the sample frozen at $-70^{\circ}C$ was similar to that of the control sample, compared with the other freezing conditions (-20 and $-196^{\circ}C$). The antioxidant activities of the frozen samples decreased compared to those of the control, but there was no significant (p<0.05) difference among the treatments. In terms of TPC, the samples frozen at -70 and $-196^{\circ}C$ had significantly (p<0.05) higher values than the sample frozen at $-20^{\circ}C$. In addition, the drip loss of the sample frozen at $-20^{\circ}C$ was higher than those of the other frozen samples. These results suggest that freezing at $-70^{\circ}C$ in a gas nitrogen convection chamber can be an optimal freezing method of producing high-quality frozen lotus roots.

키워드

참고문헌

  1. Bae MJ, Kim SJ, Ye EJ, Nam HS, Park EM (2008) Study on the chemical composition of lotus root and functional evaluation of fermented lotus root drink. Korean J Food Culture, 23, 222-227
  2. Park KJ, Jeong JW, Lim JH, Kun KB (2008) Quality changes in peeled lotus roots immersed in electrolyzed water prior to wrap- and vacuum-packaging. Korean J Food Preserv, 15, 622-629
  3. XU S, Shoemaker CF (1986) Gelatinization properties of Chinese water chestnut starch and lotus root starch. J Food Sci, 51, 445-449 https://doi.org/10.1111/j.1365-2621.1986.tb11151.x
  4. Du J, Fu Y, Wang N (2009) Effects of aqueous chlorine dioxide treatment on browning of fresh-cut lotus root. LWT-Food Sci Technol, 42, 654-659 https://doi.org/10.1016/j.lwt.2008.08.007
  5. Xing Y, Li X, Xu Q, Jiang Y, Yun J, Li W (2010) Effects of chitosan-based coating and modified atmosphere packaging (MAP) on browning and shelf life of fresh-cut lotus root (Nelumbo nucifera Gaerth). Innov Food Sci Emerg Technol, 11, 684-689 https://doi.org/10.1016/j.ifset.2010.07.006
  6. Kim HB, Chung HS, Moon KD (2014) Browning inhibition of fresh-cut lotus roots by blanching in Glycyrrhiza glabra L. and Astragalus membranaceus Bunge extracts. Korean J Food Preserv, 21, 151-156 https://doi.org/10.11002/kjfp.2014.21.2.151
  7. Lee YJ, Lee HO, Kim JY, Kwon KH, Cha HS (2011) Quality characteristics of frozen Doraji (Platycodon grandiflorum) according to various blanching treatment conditions. Korean J Food Preserv, 18, 661-668 https://doi.org/10.11002/kjfp.2011.18.5.661
  8. Patras A, Tiwari B, Brunton N (2011) Influence of blanching and low temperature preservation strategies on antioxidant activity and phytochemical content of carrots, green beans and broccoli. LWT-Food Sci Technol, 44, 299-306 https://doi.org/10.1016/j.lwt.2010.06.019
  9. Negi PS, Roy SK (2000) Effect of blanching and drying methods on $\beta$-carotene, ascorbic acid and chlorophyll retention of leafy vegetables. LWT-Food Sci Technol, 33, 295-298 https://doi.org/10.1006/fstl.2000.0659
  10. Castro SM, Saraiva JA, Lopes-da-Silva JA, Delgadillo I, Loey AV, Smout C, Hendrickx, M (2008) Effect of thermal blanching and of high pressure treatments on sweet green and red bell pepper fruits (Capsicum annuum L.). Food Chem, 107, 1436-1449 https://doi.org/10.1016/j.foodchem.2007.09.074
  11. Park JH, Hong SI, Jeong MC, Kim DM (2013) Effect of mild heat and organic acid treatments on the quality of fresh-cut lotus roots. Korean J Food Preserv, 20, 23-29 https://doi.org/10.11002/kjfp.2013.20.1.23
  12. Parreno WC, Torres MD (2005) Handbook of frozen food processing and packaging, CRC Press, New York, USA, p 391-396
  13. Roy S, Taylor T, Kramer H (2001) Textural and ultrastructural changes in carrot tissue as affected by blanching and freezing. J Food Sci, 66, 176-180 https://doi.org/10.1111/j.1365-2621.2001.tb15602.x
  14. Chassagne-Berces S, Poirier C, Devaux M-F, Fonseca F, Lahaye M, Pigorini G, Giraul C, Marin M, Guillon F (2009) Changes in texture, cellular structure and cell wall composition in apple tissue as a result of freezing. Food Res Int, 42, 788-797 https://doi.org/10.1016/j.foodres.2009.03.001
  15. Park SJ, Al Mijan M, Song KB (2014) Quality changes in Pteridium aquilinum and the root of Platycodon grandiflorum frozen under different conditions. Int J Refrig, 43, 90-96 https://doi.org/10.1016/j.ijrefrig.2014.04.004
  16. Rumbaoa RGO, Cornago DF, Geronimo IM (2009) Phenolic content and antioxidant capacity of Philippine sweet potato (Ipomoea batatas) varieties. Food Chem, 113, 1133-1138 https://doi.org/10.1016/j.foodchem.2008.08.088
  17. Kim SJ, Cho AR, Han JJ (2013) Antioxidant and antimicrobial activities of leafy green vegetable extracts and their applications to meat product preservation. Food Control, 29, 112-120 https://doi.org/10.1016/j.foodcont.2012.05.060
  18. Benzie IFF, Strain JJ (1996) The ferric reducing ability of plasma (FRAP) as a measure of antioxidant power : the FRAP assay. Anal Biochem, 239, 70-76 https://doi.org/10.1006/abio.1996.0292
  19. Kim MH, Kim YJ, Kim KS, Song YB, Seo WJ (2009) Microbial changes in hot peppers, ginger, and carrots treated with aqueous chlorine dioxide or fumaric acid. Korean J Food Preserv, 16, 1013-1017
  20. Han Y, Floros J, Linton R, Nielsen S, Nelson E (2001) Response surface modeling for the inactivation of Escherichia coli O157:H7 on green peppers (Capsicum annuum L.) by chlorine dioxide gas treatments. J Food Protect, 64, 1128-1133
  21. Chang MS, Kim JG, Kim GH (2011) Quality characteristics of fresh-cut lotus roots according to the temperature of the wash water. Korean J Food Preserv, 18, 288-293 https://doi.org/10.11002/kjfp.2011.18.3.288
  22. Breidt F, Hayes J, Fleming H (2000) Reduction of microflora of whole pickling cucumbers by blanching. J Food Sci, 65, 1354-1358 https://doi.org/10.1111/j.1365-2621.2000.tb10611.x
  23. Kim JG, Choi ST, Pae DH (2009) Effect of heat treatment and dipping solution combination on the quality of peeled potato 'Jopung'. Korean J Hort Sci Technol, 27, 256-262
  24. Ralph GK, Sascha B, Gudrun W, Walter PH, Reinhold C (2005) Quality of minimally processed carrots as affected by warm water washing and chlorination. Innov Food Sci Emerg, 6, 351-362 https://doi.org/10.1016/j.ifset.2005.03.002
  25. Lee HS (1995) The measurement methods of the textural characteristics of fermented vegetable. Korean J Soc Food Sci, 11, 83-91
  26. Amin I, Norazaidah Y, Hainida K (2006) Antioxidant activity and phenolic content of raw and blanched Amaranthus species. Food Chem, 94, 47-52 https://doi.org/10.1016/j.foodchem.2004.10.048
  27. Delgado A, Rubiolo A (2005) Microstructural changes in strawberry after freezing and thawing processes. LWT-Food Sci Technol, 38, 135-142 https://doi.org/10.1016/j.lwt.2004.04.015
  28. Chassagne-Berces S, Fonseca F, Citeau, M, Marin M (2010) Freezing protocol effect on quality properties of fruit tissue according to the fruit, the variety and the stage of maturity. LWT-Food Sci Technol, 43, 1441-1449 https://doi.org/10.1016/j.lwt.2010.04.004
  29. Van Buggenhout S, Lille M, Messagie I, Van Loey A, Autio K, Hendrickx M (2006) Impact of pretreatment and freezing conditions on the microstructure of frozen carrots : quantification and relation to texture loss. Eur Food Res Technol, 222, 543-553 https://doi.org/10.1007/s00217-005-0135-6
  30. Volden J, Bengtsson GB, Wicklund T (2009) Glucosinolates, L-ascorbic acid, total phenols, anthocyanins, antioxidant capacities and colour in cauliflower (Brassica oleracea L. ssp. botrytis) : effects of long-term freezer storage. Food Chem, 112, 967-976 https://doi.org/10.1016/j.foodchem.2008.07.018
  31. Holzwarth M, Korhummel S, Carle R, Kammerer DR (2012) Evaluation of the effects of different freezing and thawing methods on color, polyphenol and ascorbic acid retention in strawberries (Fragaria$\times$ananassa Duch). Food Res Int, 48, 241-248 https://doi.org/10.1016/j.foodres.2012.04.004

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