Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Effect of Postharvest Treatments on Storage Quality of Buckwheat Sprouts

메밀 새싹채소의 저장품질에 대한 수확 후 처리공정 효과

  • Received : 2010.11.17
  • Accepted : 2011.02.11
  • Published : 2011.02.28
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Abstract

The storage quality of fresh buckwheat sprouts, as influenced by pretreatment and packaging within processing steps, was investigated to establish appropriate postharvest handling treatment for the commodity. After harvest, the sprouts were dipped in chlorine water (100 ppm), rinsed twice with clean water, pre-cooled with iced water, de-watered, and packed in plastic trays. Sprout samples taken from each processing step were stored at $5^{\circ}C$ for 6 days to measure quality attributes. Viable cell counts of mesophilic aerobes and coliform bacteria were lower by about 1 log scale in the postharvest treated samples compared to an untreated control, although the initial microbial reduction due to the postharvest treatments was offset by cell growth during storage. All sprout samples showed a decrease of fresh weight by approximately 4% after 6 days of storage. However, moisture and soluble solid contents were maintained at the initial levels of the sprouts. No significant difference in surface color was observed among sample treatments. For sensory properties including discoloration, wilting, decay, and visual quality, there were no significant differences among sample treatments. The present results suggest that proper postharvest processing treatments can exert positive effects on extending the shelf-life of fresh buckwheat sprout.

효율적인 메밀 새싹채소의 수확 후 관리방법을 구축하기 위하여, 적정 염소수세와 헹굼, 예냉, 포장 처리를 새싹 재배공장에서 각기 구분하여 실시하고 관행적으로 출고하던 메밀 새싹과 비교하여 이들 처리구의 저장 중 품질특성 변화를 측정하였다. 수확 후 염소수세 및 헹굼 과정을 거친 모든 처리구의 호기성 중온균과 대장균군은 무처리 대조구에 비해 약 1 log cycle 정도 감소하였으나 저장 중 증가하여 처리구간의 차이를 구분할 수 없었다. 무처리 대조구를 포함하여 염소수세, 냉수예냉, PP 용기 밀봉포장 처리구의 생체중량 감소율은 저장기간 중 4% 이하의 낮은 수준을 유지하였다. 저장 중 새싹시료의 수분함량, 가용성 고형분함량, 표면색 등은 유의적인 차이를 확인할 수 없었고, 관능평가 측면에서도 처리구별로 유의차를 구분할 수 없었다. 결과적으로 메밀 새싹의 수확 후 관리공정에서 염소수 소독처리를 통해 오염미생물을 저감시키고, 적절한 헹굼과 예냉과정을 거쳐 기체투과성이 높은 포장재로 밀봉하는 방법을 적용한다면 새싹채소 상품의 유통 중 신선도 유지에 긍정적 효과를 기대할 수 있을 것으로 판단되었다.

Keywords

References

  1. Kwock CK, Jang JK. The promotion strategies of well-being food industry: Focusing on fresh-cut produce industry. Food Ind. Nutr. 13: 17-27 (2008)
  2. Hurst WC, Schuler GA. Fresh produce processing-an industry perspective. J. Food Protect. 55: 824-827 (1992)
  3. Zagory D. Effects of post-processing handling and packaging on microbial populations. Postharvest Biol. Tec. 15: 313-321 (1999) https://doi.org/10.1016/S0925-5214(98)00093-3
  4. Garg N, Churey JJ, Splittstoesser DF. Effect of processing conditions on the microflora of fresh-cut vegetables. J. Food Protect. 53: 701-703 (1990)
  5. Kaneko KI, Hayashidani H, Takahashi K, Shiraki Y, Limawongpranee S, Ogawa M. Bacterial contamination in the environment of food factories processing ready-to-eat fresh vegetables. J. Food Protect. 62: 800-804 (1999)
  6. Allende A, Aguayo E, Artes F. Microbial and sensory quality of commercial fresh processed red lettuce throughout the production chain and shelf life. Int. J. Food Microbiol. 91: 109-117 (2004) https://doi.org/10.1016/S0168-1605(03)00373-8
  7. Koseki S, Isobe S. Prediction of pathogen growth on iceberg lettuce under real temperature history during distribution from farm to table. Int. J. Food Microbiol. 104: 239-248 (2005) https://doi.org/10.1016/j.ijfoodmicro.2005.02.012
  8. Seo JE, Lee JK, Oh SW, Koo MS, Kim YH, Kim YJ. Changes of microorganisms during fresh-cut cabbage processing: Focusing on the changes of air-borne microorganisms. J. Food Hyg. Saf. 22: 288-293 (2007)
  9. Kim KY, Nam MJ, Lee HW, Shim WB, Yoon YH, Kim SR, Kim DH, Ryu JG, Hong MK, You OJ, Chung DH. Microbiological safety assessment of a perilla leaf postharvest facility for application of a good agricultural practices (GAP) system. Korean J. Food Sci. Technol. 41: 392-398 (2009)
  10. Varzakas TH, Arvanitoyannis IS. Application of ISO22000 and comparison to HACCP for processing of ready to eat vegetables: Part I. Int. J. Food Sci. Tech. 43: 1729-1741 (2008) https://doi.org/10.1111/j.1365-2621.2007.01675.x
  11. Food Standards Australia New Zealand (FSANZ). Primary production & processing standard for seed sprouts. Proposal P1004. Available from: http://www.foodstandards.gov.au/foodstandards/proposals/proposalp1004primary4361.cfm. Accessed Nov. 8, 2010.
  12. Kim YJ, Park HT, Han HS. A study on the production and marketing of sprouts and leaf vegetables. Research Report of Korea Rural Economic Institute (C2006-26), Korea. pp. 84-87 (2006)
  13. Taormina PJ, Beuchat LR, Slutsker L. Infections associated with eating seed sprouts: and international concern. Emerg. Infect. Dis. 5: 626-634 (1999) https://doi.org/10.3201/eid0505.990503
  14. Control Disease Center (CDC). Multistate outbreak of human Salmonella Newport infections linked to raw alfalfa sprouts. Available from: http://www.cdc.gov/salmonella/newport/index.html. Accessed Oct. 18, 2010.
  15. National Advisory Committee on Microbiological Criteria for Foods (NACMCF). Microbiological safety evaluations and recommendations on sprouted seeds. Int. J. Food Microbiol. 52: 123-153 (1999) https://doi.org/10.1016/S0168-1605(99)00135-X
  16. Taormina PJ, Beuchat LR. Behavior of enterohemorrhagic Escherichia coli O157:H7 on alfalfa sprouts during the sprouting process as influenced by treatments with various chemicals. J. Food Protect. 62: 850-856 (1999)
  17. Fett WF. Reduction of the native microflora on alfalfa sprouts during propagation by addition of antimicrobial compounds to the irrigation water. Int. J. Food Microbiol. 72: 13-18 (2002) https://doi.org/10.1016/S0168-1605(01)00730-9
  18. Kim JK. Safety technology of fresh-cut fruit and vegetable. Food Preserv. Process. Ind. 4(2): 18-25 (2005)
  19. Kang KJ. Korean disinfectants/sanitizers for food safety. Food Sci. Ind. 38(3): 99-106 (2005)
  20. Lee HH, Hong SI, Kim DM. Microbiological characterization and chlorine treatment of buckwheat sprouts. Korean J. Food Sci. Technol. 41: 452-457 (2009)
  21. Daniels JA, Krishnamurthi R, Rizvi SH. A review of effects of carbon dioxide on microbial growth and food quality. J. Food Protect. 48: 532-537 (1985)
  22. Hao YY, Brackett RE, Beuchat LR, Doyle MP. Microbiological quality and production of botulinal toxin in film-packaged broccoli, carrots, and green beans. J. Food Protect. 62: 499-508 (1999)
  23. Lipton WJ. Anatomical observations on russet spotting and pink rib of lettuce. Proc. Am. Soc. Hort. Sci. 78: 367-374 (1961)
  24. Soylemez G, Brashears MM, Smith DA, Cuppett SL. Microbial quality of alfalfa seeds and sprouts after a chlorine treatment and packaging modifications. J. Food Sci. 66: 153-157 (2001) https://doi.org/10.1111/j.1365-2621.2001.tb15598.x