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Effects on Storage Property of Fresh Jujube Treated with Grape Fruit Stem Extracts (GFSE) and Fermented Pollen (FP)

포도줄기추출물 및 발효화분 처리가 생대추의 저장기간에 미치는 영향

  • Woo, Koan-Sik (Crop Post-Harvest Technology Division, National Institute of Crop Science, Rural Development Administration) ;
  • Hwang, In-Guk (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Jang, Keum-Il (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Kang, Tae-Su (Dept. of Biofood Science and Biotechnology, Chungbuk Provincial University of Science and Technology) ;
  • Lee, Hee-Bong (Dept. of Food Science and Technology, Chungbuk National University) ;
  • Jeong, Heon-Sang (Dept. of Food Science and Technology, Chungbuk National University)
  • 우관식 (농촌진흥청 작물과학원) ;
  • 황인국 (충북대학교 식품공학과) ;
  • 장금일 (충북대학교 식품공학과) ;
  • 강태수 (충북과학대학 바이오식품생명과학과) ;
  • 이희봉 (충북대학교 식품공학과) ;
  • 정헌상 (충북대학교 식품공학과)
  • Published : 2008.08.30

Abstract

Treatment effects of grape fruit stem extracts (GFSE) containing trans-resveratrol or fermented pollen (FP), and ethylene gas scavenging material (EGS) on the storage property of fresh jujube (Z izyphus jujuba forma hoonensis C.S. Yook) were investigated. Fresh jujubes were packed in different storage containers (PE film and Lock & Lock vessel), and treated with GFSE containing trans-resveratrol of 30 ppm or 1% FP, and EGS. The storage vessels were stored in refrigerator ($0{\pm}1^{\circ}C$) during 12 weeks, and then quality characteristics during storage period were analysed. Hardness slightly increased until 4 weeks and decreased afterward. Soluble solid ($^{\circ}Bx$) and total titratable acidity of fresh jujube slightly increased in all treatments during storage period. Vitamin C content of fresh jujube slightly decreased in all treatments during storage period. Number of microorganisms decreased until 4 weeks and increased afterward. The decay enzyme activity increased in all treatments during storage period. Storage stability was higher for PE film than Lock & Lock containers. Storage period of fresh jujube in this experiment ranges in $8{\sim}9$ weeks for maturity fruits treated with 30 ppm of GFSE and ethylene gas scavenging material.

생대추의 저장기간을 연장하기 위하여 완숙 생대추를 PE와 밀폐용기를 이용하여 포도줄기추출물 및 발효화분을 처리하고 에틸렌가스제거제를 첨가하여 $0^{\circ}C$에서 저장하면서 장해과 발생율, 경도, 총산도, 가용성 성분의 함량, 비타민 C 함량, 미생물수 및 연화효소 등을 측정한 결과 장해과 발생율은 밀폐용기 처리구가 PE 포장 처리구에 비하여 부패율은 더 적은 것으로 나타났으며, 발효화분과 에틸렌가스 제거제 처리구의 상태가 양호하였다. 경도는 전반적으로 4주차까지는 증가하는 경향을 나타냈으나, 그 후부터는 감소하는 경향을 보였다. 총산도는 각각의 처리구별로 큰 차이는 없었지만 저장기간이 경과함에 따라 증가하는 경향을 나타내었다. 가용성 성분은 초기 당도는 $33.97^{\circ}Bx$로 저장 2주까지는 모든 처리구에서 당도가 약간 증가됨을 보이다 $9{\sim}12$주에서는 감소되는 경향을 나타내었다. 생대추의 vitamin C 함량은 401.97 mg/100 g이었으며, 저장기간에 따른 함량 변화는 대추의 개별특성상 차이가 있지만 대체로 저장기간에 따라 감소되는 경향을 나타내었다. 미생물수는 전체적으로 초기에는 균이 감소하는 경향을 나타냈지만 4주 이상부터는 다시 증가하여 12주까지 계속적으로 유지되는 경향이 나타났고 연화효소는 저장방법에 관계없이 증가하는 경향을 보였으며, 특히 연화가 급격하게 증가하는 저장 $4{\sim}5$주까지는 효소량이 급격하게 증가하는 것으로 나타났다. 본 연구 결과 완숙대추를 이용한 저장은 $8{\sim}9$주까지 가능한 것으로 판단되며, 포도줄기추출물과 에틸렌가스제거제를 동시에 처리할 경우에 좀 더 저장기간을 연장시킬 수 있는 것으로 나타났다.

Keywords

References

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Cited by

  1. 농가에서 활용가능한 생대추의 저장조건 연구 vol.42, pp.8, 2008, https://doi.org/10.3746/jkfn.2013.42.8.1296