Quality Characteristics of Cherry Tomato and Unshiu Orange Packaged with Box Incorporated with Antimicrobial Agents

항균소재 함유 박스로 포장한 방울토마토와 밀감의 저장중 품질 특성

  • Park Woo-Po (Division of Food Science, Masan College) ;
  • Kim Chul-Hwan (Department of Forest Products, Gyeongsang National University) ;
  • Cho Sung-Hwan (Department of Food Science and Technology.Institute of Agriculture and Life Sciences, Gyeongsang National University)
  • 박우포 (마산대학 식품과학부) ;
  • 김철환 (경상대학교 임산공학과) ;
  • 조성환 (경상대학교 식품공학과.농업생명과학연구원)
  • Published : 2006.06.01

Abstract

In order to help the preservation of the cherry tomato and unshiu orange, antimicrobial paper incorporating grapefruit seed extract and zeolite was applied to the package. Cherry tomato and unshiu orange were packed in a box (38x25x20 cm) attached with antimicrobial paper and then stored respectively at $5^{\circ}C$. During the storage, weight loss, pH total acidity, soluble solid content microbial load and decay ratio were measured as quality indices. pH increase in cherry tomato was observed until 20 days, and decreased with litle difference between the packaging treatments thereafter pH and total acidity decrease in unshiu orange were shown till 30 days, and abrupt change was revealed by 40 days. This was due to physiological disorders. The microbial loads of total aerobic bacteria, and yeast/mold count were suppressed during storage by the box packaging incorporated with antimicrobial agents, which also contributed to reducing the decayed cherry tomato and unshiu orange. Antimicrobial paper was useful fur the reduction of microbial load in cherry tomato and unshiu orange pear without other quality deterioration.

항균소재를 함유한 포장지로 포장하여 실험실 조건하에서 저장하였을 때 방울토마토와 밀감의 저장기간 연장효과가 있는 것으로 나타난 항균포장지가 대규모 저장 및 유통시에도 적용이 가능한지를 알아보기 위하여 항균포장지를 함유한 박스에 방울토마토와 밀감을 담아서 냉장 창고에서 저장하면서 품질 변화를 고찰하였다. 즉 분말 형태의 식물성 천연항균제인 자몽추출물제재와 제올라이트를 각각 3% 및 6%를 넣어서 만든 항균포장지로 방울토마토와 밀감을 포장하여 $5^{\circ}C$에서 저장하면서 품질특성의 변화를 측정하였다. 저장 기간중 품질 변화의 지표로 중량감소율, pH, 총산, 가용성고형물, 총균수, 효모 및 곰팡이수 등을 측정하였다. 방울토마토의 pH는 저장 20일까지는 다소 증가하였으나 저장 40일에는 급격하게 감소하였다. 가용성 고형물은 포장 직후 5.5 $^{\circ}Brix$였으며, 저장 10일에 5.8 $^{\circ}Brix$까지 증가하였다. 포장 직후 방울토마토의 총균수는 $10^{2.87}CFU/g$, 효모 및 곰팡이는 $10^{2.76}CFU/g$ 이었으며, 저장 기간이 경과함에 따라 지속적으로 증가하였다. 저장 30일에 대조구는 11.5%, 항균포장지를 함유한 박스로 포장한 시험구는 1.5%의 부패가 발생하여 항균포장지를 함유한 박스포장이 방울토마토의 부패를 억제하는 효과가 있는 것으로 확인하였다. 밀감은 저장 직후 pH 3.78, 총산 0.68%였으며 저장 30일까지는 대체적으로 감소하였으나 가용성 고형물은 저장 직후 10.7 $^{\circ}Brix$ 였으며, 저장 30일까지는 다소 증가하였다. 포장 직후 밀감의 총균수는 $10^{4.01}CFU/g$이었으며, 효모 및 곰팡이는 $10^{3.99}CFU/g$이었고,저장기간이 경과함에 따라 지속적으로 증가하였다. 저장 20일에 대조구는 1.3%의 부패율을 나타내었으나 항균포장지를 함유한 박스에 포장한 밀감은 저장 30일에 부패가 발생하여, 대조구에 비하여 10일 정도 저장기간의 연장 효과가 있었다.

Keywords

References

  1. Cho, S.H., Chung, J.H. and Ryu, C.H. (1994) Inhibitory effects of natural antimicrobial agents on postharvest decay in fruits and vegetables under natural low temperatures. J. Korean Soc. Food Nutri., 23, 315-321
  2. Lattanzio, V., Cardianli, A. and Palmieri, S. (1994) The role of phenolics in the postharvest physiology of fruits and vegetables, browning reactions and fungal diseases. Ital. J. Food Sci., 6, 3-22
  3. An, D.S., Hwang, Y.I., Cho, S.H. and Lee, D.S. (1998) Packaging of fresh curled lettuce and cucumber by using low density polyethylene films impregnated with antimicrobial agents. J. Korean Soc. Food Sci. Nutr., 27, 675-681
  4. Chung, S.K., Lee, D.S. and Cho, S.H. (1999) Antimicrobial packaging films for the preservation of harvested grapes. Korean J. Postharvest Sci. Technol., 6, 43-47
  5. Chung, S.K. and Cho, S.H. (2002) Preservation of strawberries and cucumbers packaged by low density polyethylene film impregnated with antimicrobial agent, Scutellariae baicalensis extract. Korean J. of Food Preserv., 9, 271-276
  6. Kim, Y.M., Lee, S.B., Cho, S.H. and Lee, D.S. (2000) Fabrication of polyethylene films coated with antimicrobials in a binder and their application to modified atmosphere packaging of strawberries. Korean J. Postharvest Sci. Technol., 7, 12-18
  7. Park, W.P., Cho, S.H. and Kim, C.H. (2004) Quality characteristics of cherry tomatoes packaged with paper bag incorporated with antimicrobial agents. J. Korean Soc. Food Sci. Nutr., 33, 1381-1384 https://doi.org/10.3746/jkfn.2004.33.8.1381
  8. Park, W.P., Jung, J.H., Cho, S.H. and Kim, C.H. (2004) Quality characteristics of unshiu orange and pear packaged with paper incorporated with antimicrobial agents. J. Korean Soc. Food Sci. Nutr., 33, 1715-1719 https://doi.org/10.3746/jkfn.2004.33.10.1715
  9. Kim, C.H., Kim, J.O., Park, W.P., Jung, J.H. and Cho, S.H. (2005) Evaluation of freshness prolonging ability of antibacterial packaging bags and corrugated boxes. Korean J. Food Sci. Technol., 37, 364-371
  10. Cho, S.H., Lee, H.C, Seo, I.W., Kim, Z.U., Chang, Y.S. and Shin, Z.I. (1991) Efficacy of grapefruit seed extract in the prevention of Satsuma mandarin. Korean J. Food Sci. Technol., 23, 614-618
  11. Park, W.P, Cho, S.H. and Kim, C.H. (2002) Changes in quality characteristics of cherry tomato packaged with different films. Korean J. Postharvest Sci. Technol., 9, 121-125
  12. Kim, Y.M., Lee, N.K., Park, H.D. and Lee, D.S. (2000) Migration of bacteriocin from bacteriocin-coated film and its antimicrobial activity. Food Sci. Biotechnol., 9, 325-329
  13. Moon, K.D., Lee, C.H., Kim, J.K. and Sohn, T.H. (1992) Storage of tomatoes by polyethylene film packaging and $CO_2$ treatment. Korean J. Food Sci. Technol., 24, 603-609