Changes in Mineral and Pectic Substances of Korean Mature-Green Mume (Prunus mume Sieb. et Zucc) Fruits Packaged in Plastic Films with Gas Absorbents during Storage

가스 제거제 첨가에 따른 필름 포장 청매실의 저장 중 무기질 및 펙틴 성분 변화

  • Published : 2003.02.01

Abstract

Changes in mineral (Ca, Mg) contents and pectic substances of mature-green 'Nanko' Mume fruits hermetically packaged in 0.03 mm low density polyethylene (LDPE) films with and without gas absorbents were examined during storage at $25^{\circ}C$ for 10 days. Each packaging contained 10 g $Ca(OH)_2$ as a carbon dioxide scavenger, 30 g $KMnO_4$ as an ethylene scrubber or their mixture. In the presence of the ethylene scrubber, losses in mineral contents of alcohol insoluble solids and water soluble pectin were remarkably suppressed, whereas no significant difference was observed in the Ca content between the fresh fruit and those stored for 10 days. Fruits packaged with the ethylene absorbent retained higher amount of pectic substances than those with other packaging treatments. Degradation of the pectic substances into small molecules was also noticeably reduced when the ethylene scrubber was used. Overall results showed that the combination of the gas permeable film and the ethylene absorbent could be applied to mature-green Mume fruits as an effective packaging method to retard the texture softening during storage at the ambient temperature.

Keywords

mature-green Mume fruits;pectic substances;plastic film packaging;gas absorbents;texture softening

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