골판지 포장지의 알루미늄 코팅이 팽이버섯의 저온저장 중 품질 특성에 미치는 영향
The effect of aluminum coating to corrugated packaging on quality characteristics of Enoki mushrooms (Flammulina velutipes) during storage
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초록
팽이버섯은 다양한 영양성분이 함유되어 있어 우수한 식품 소재로 알려져 있지만, 높은 수분함량 및 높은 호흡량으로 인해 심한 갈변과 부패로 유통기간이 짧아 저장유통 중 품질보존을 위한 연구가 필요한 실정이다. 따라서 본 연구에서는 농산물 유통 시 주로 사용되는 골판지상자의 내부에 알루미늄을 코팅하여 기능성을 부여한 포장용기를 개발하였으며, 이를 이용하여 팽이버섯을 포장하여 저장 중 선도 유지 및 품질특성에 미치는 영향을 조사하였다. 골판지상자 내부에 알루미늄을 코팅함으로써 중량변화율 및 경도의 감소를 방지하였으며, pH의 변화를 억제하는 것으로 나타났다. 또한, 산화효소 활성을 억제함으로써 저장기간 중 팽이버섯의 갈변을 저해하였고, 미생물의 증식을 억제하는데 효과적인 것으로 나타났다. 향후 관능적 품질, 포장지 내부의 기체 조성과 향기 성분에 대한 추가연구를 통하여 Shelf-life 연장효과를 종합적으로 규명하는 것이 필요할 것으로 판단된다.
Abstract
We examined the physicochemical properties and microbial safety of Enoki mushrooms during storage at 5℃ for 9 weeks, with different packaging containers that are corrugated, Al-coated, and without packaging (control). The weight change of Enoki mushrooms in the different containers due to moisture loss was 1.9%, 0.9%, 0.6% for control, corrugated, and Al-coated packaging, respectively. The degree of browning rapidly increased as the storage period increased in the control sample. However, corrugated and Al-coated packaging suppressed the browning degree. The changes of color L-, a-, and b-vlaues were minimal changes in Al-coated packaging. There was no significant difference in the total amino acids, polyphenol oxidase, and peroxidase in corrugated packaging and Al-coated packaging, regardless of the storage period. The microbial growth such as total aerobic bacteria, yeast, and mold of Enoki mushroom during the storage period, were significantly suppressed in Al-coated packaging samples as compared to the control and corrugated packaging. In conclusion, Al-coated packaging has beneficial effects such as preventing moisture loss, maintaining browning degree, inhibiting oxidative enzyme reaction, and ensuring microbial safety of Enoki mushrooms during the storage period. Al-coated packaging is considered effective for extending the shelf-life and improving the storage and distribution of mushrooms.
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