BACKGROUND Active packaging containing natural flavonoid has recently emerged due to its potential to inhibit the oxidation of foods by interacting with it and/or its surrounding environment, with the aim of counteracting oxidation reactions and extending the shelf-life of foods. The plant Spondias purpurea L. is widely found in northeastern Brazil and is known to contain bioactive flavonoids. The aim of this study was to obtain a flavonoid-rich fraction from the pulp of S. purpurea L. and incorporate it into the cellulose acetate film to obtain biodegradable films with antioxidant properties. RESULTS The fractionation in SiO2 open-column chromatography of the S. purpurea pulp crude extract furnished an antioxidant active fraction containing the flavonols quercetin 3-O-rutinoside and kaempferol 3-O-rutinoside as the major compounds. This active fraction was incorporated (10, 20, and 30 g kg-1 ) into the substance produced with the casting method for cellulose acetate films. The films produced were characterized concerning mechanical properties, water vapor permeability (WVP) and antioxidant activity. CONCLUSION The incorporation of the active flavonoid fraction from S. purpurea in the cellulose acetate films decreases WVP and elongation at break, while it also increases antioxidant activity, tensile strength and elastic modulus. Thus, the S. purpurea pulps may be an alternative as a source of antioxidants to be used in cellulose acetate films. This article is protected by copyright. All rights reserved.

中文翻译：

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Spondias purpurea L. 果肉中富含黄酮醇的抗氧化成分的表征及其对醋酸纤维素基薄膜的影响

背景技术最近出现了含有天然黄酮类化合物的活性包装，因为它有可能通过与食品和/或其周围环境相互作用来抑制食品的氧化，目的是抵消氧化反应并延长食品的保质期。植物 Spondias purpurea L. 广泛存在于巴西东北部，已知含有生物活性黄酮类化合物。本研究的目的是从 S. purpurea L. 的果肉中获得富含类黄酮的部分，并将其掺入醋酸纤维素薄膜中，以获得具有抗氧化性能的可生物降解薄膜。结果 S. purpurea 果肉粗提物的 SiO2 开柱色谱分馏提供了抗氧化活性组分，其中主要化合物是黄酮醇槲皮素 3-O-芸香苷和山奈酚 3-O-芸香苷。将该活性部分加入（10、20和30 g kg-1 ）到用醋酸纤维素膜的流延方法生产的物质中。生产的薄膜在机械性能、水蒸气渗透性 (WVP) 和抗氧化活性方面进行表征。结论 在醋酸纤维素薄膜中加入来自 S. purpurea 的活性黄酮类成分可降低 WVP 和断裂伸长率，同时还增加抗氧化活性、拉伸强度和弹性模量。因此，S. purpurea 纸浆可以作为用于醋酸纤维素薄膜的抗氧化剂来源的替代品。本文受版权保护。版权所有。生产的薄膜在机械性能、水蒸气渗透性 (WVP) 和抗氧化活性方面进行表征。结论 在醋酸纤维素薄膜中加入来自 S. purpurea 的活性黄酮类成分可降低 WVP 和断裂伸长率，同时还增加抗氧化活性、拉伸强度和弹性模量。因此，S. purpurea 纸浆可以作为用于醋酸纤维素薄膜的抗氧化剂来源的替代品。本文受版权保护。版权所有。生产的薄膜在机械性能、水蒸气渗透性 (WVP) 和抗氧化活性方面进行表征。结论 在醋酸纤维素薄膜中加入来自 S. purpurea 的活性黄酮类成分可降低 WVP 和断裂伸长率，同时还增加抗氧化活性、拉伸强度和弹性模量。因此，S. purpurea 纸浆可以作为用于醋酸纤维素薄膜的抗氧化剂来源的替代品。本文受版权保护。版权所有。S. purpurea 纸浆可能是醋酸纤维素薄膜中使用的抗氧化剂来源的替代品。本文受版权保护。版权所有。S. purpurea 纸浆可能是醋酸纤维素薄膜中使用的抗氧化剂来源的替代品。本文受版权保护。版权所有。