FucoPol and chitosan bilayer films for walnut kernels and oil preservation
作者： Ana Rita V. Ferreira , Narcisa M. Bandarra , Margarida Moldão-Martins , Isabel M. Coelhoso , Vítor D. Alves
DOI: 10.1016/J.LWT.2018.01.020
关键词:
摘要: Abstract Bilayer films composed of a bacterial exopolysaccharide (FucoPol) and chitosan were studied in terms barrier material for walnuts (Juglans regia L.) preservation opposition to non-biodegradable commercial film used that purpose (polyamide cast flexible-polyethylene - PA/PE 90). In experiments conducted under accelerated storage conditions (24 h light, 33% RH, 38 °C 14 days) using oil, the oxygen content nitrogen flushed packages increased 5–7% with both films. addition, after one day, oil stored contact 21% presented peroxide value above legal limit olive Portugal (15 meqO2 kg−1), while bilayer only present values at end experiment. The conjugated dienes trienes over time was also quite similar Furthermore, sensory analysis performed on walnut kernels, same as revealed non-significant differences rancidity. results have shown capacity biodegradable FucoPol/chitosan equivalent ones, which makes them promising sustainable alternative packaging materials walnuts.
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