Effects of modified atmospheres on textural and cell wall changes of asparagus during shelf-life
作者： HELEN P. EVERSON , KEITH W. WALDRON , JOHN D. GEESON , K. MARTIN BROWNE
DOI: 10.1111/J.1365-2621.1992.TB01195.X
关键词:
摘要: Summary Spears of asparagus cultivator (cv) Regal harvested from a commercial crop on 16 May, 30 and 6 June, 1989 were packaged in rigid PVC trays (300g per pack) over-wrapped with non-perforated 15 μ stretch (Auto RMF-A), similar micro-perforated film or highly perforated control film. Packs held at 8°C for 1 d, then transferred to 20°C simulate cool chain distribution ambient display. Respiration rates as mg CO2 production kg-1h-1 determined each harvest, changes the pack atmosphere composition weight losses monitored during shelf-life. On day after 3 6d shelf-life, shear force's required cut through spears visual quality determined, cooked samples assessed tenderness, stringiness, flavour, bitterness by trained sensory panel. At these intervals, treatment also extracted alcohol-insoluble residues (AIR's), which sugars cell wall phenolics determined. Rates respiration extent modification harvest; packs, increased > 11% O2 fell 400% control, 200% < 100% packs. The relationships between instrumental methods assessing textural composition, effects modified atmospheres are discussed. The possible benefits limitations (MA) packaging retard post-harvest deterioration, particularly
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