Changes in Nutrient Composition and Quality Characteristics of Peeled Citrullus Lunatus, Preserved in Different Packaging Materials.

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Abstract

Peeled melon seeds are widely consumed and are export items for several countries. The present research was conducted to establish the appropriate packaging materials for nutrient retention and shelf stability of peeled melon seeds (Citrullus lanatus). Fresh melon seeds were peeled and stored in three packaging materials- (Hessian Brown Bag (HBB), Propylene Bag (GSB) and Transparent Polyethylene Bag (TPB) for three months. Functional properties, physiochemical properties and nutrient composition of the samples were determined at the onset and after 3 months using standard AOAC methods. There was no significant difference (p>0.05) between the fresh and samples stored for 3 months in all the functional properties. Emulsion capacity decreased after 3 months, while emulsion stability increased. All the vitamins, minerals and approximate nutrients determined (except carbohydrates) decreased as the storage period increased. The indices of fat deterioration increased with the storage period. Both the storage period and the packaging material did not affect the magnesium and zinc contents; iron, manganese, vitamin B6 and vitamin A contents decreased with storage period. Melon seeds packaged in Hessian bag retained the highest amount of nutrients and was the least susceptible to deterioration by fat rancidity.
用不同包装材料保存的去皮南瓜营养成分和质量特性的变化
去皮瓜子被广泛食用,也是多个国家的出口商品。本研究旨在确定合适的包装材料,以保持去皮瓜子(Citrullus lanatus)的营养成分和货架稳定性。新鲜瓜子去皮后,用三种包装材料(黑森棕袋(HBB)、丙烯袋(GSB)和透明聚乙烯袋(TPB))贮藏三个月。采用 AOAC 标准方法测定了样品的功能特性、理化特性和营养成分。新鲜样品和存放 3 个月的样品在所有功能特性方面均无明显差异(p>0.05)。3 个月后,乳化能力下降,而乳化稳定性增加。随着贮藏时间的延长,测定的所有维生素、矿物质和近似营养成分(碳水化合物除外)都有所下降。脂肪变质指数随着储存时间的延长而增加。贮藏期和包装材料都不会影响镁和锌的含量;铁、锰、维生素 B6 和维生素 A 的含量随着贮藏期的延长而减少。用黑森袋包装的瓜子保留的营养成分最多,而且最不易因脂肪酸败而变质。
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