This study aims to evaluate the effect of packaging system, including packaging materials with low, medium, and high oxygen permeance (OP), with or without initial atmosphere modification (IAM: 5kPaO₂–10kPaCO₂–85kPaN₂) on minimally processed beet leaves (MPBL) overall quality during 8 days of storage at 12°C. Changes in microbial quality, pH, moisture content, and antioxidant capacity were independent of the packaging system. Samples with or without IAM achieved dynamic equilibrium in 24 or 144 hr, respectively. High, medium, and low OP material stabilized at 8kPaO₂–3.5kPaCO_2, 6kPaO₂–6kPaCO₂, and 0kPaO₂–20kPaCO₂, respectively. Low‐OP presented anoxia conditions. High‐OP material maintained total soluble solids and carotenoids and presented the highest retentions of betalains, chlorophyll, and total phenolics during storage. Moreover, active modified atmosphere packaging (with IAM) yielded significant improvements on bioactive retention. Hence, high‐OP material with IAM is recommended for MPBL preservation.

中文翻译：

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包装材料对改良气氛下包装的鲜切甜菜叶质量的影响

这项研究旨在评估包装系统，包括低氧，中氧和高氧渗透率（OP），经过或不经过初始气氛改性（IAM：5kPaO ₂ –10kPaCO ₂ –85kPaN ₂）的包装材料，对最低限度加工的甜菜叶（MPBL）在12°C下储存8天的整体质量。微生物质量，pH，水分含量和抗氧化能力的变化与包装系统无关。有或没有IAM的样品分别在24或144小时内达到动态平衡。高，中和低OP材料在8kPaO稳定₂ -3.5kPaCO _2， 6kPaO ₂ -6kPaCO ₂，和0kPaO ₂ -20kPaCO ₂， 分别。低眼压表现为缺氧状态。高OP材料在储存过程中保持了总可溶性固形物和类胡萝卜素的含量，并显示出最高的甜菜碱，叶绿素和总酚含量。此外，活性气调包装（带有IAM）在生物活性保留方面产生了显着改善。因此，建议使用带有IAM的高OP材料来保存MPBL。