涂有生物降解淀粉和纤维素基薄膜的番石榴货架期。
Shelf-life of guavas coated with biodegradable starch and cellulose-based films.
机构信息
Postgraduate Program in Biotechnology Applied to Agriculture, Paranaense University, Square Mascarenhas de Moraes, 4282, Zone III, Umuarama, PR 87502-210, Brazil.; Department of Chemistry, State University of Maringa, Av. Colombo, 5790, CEP 87020-900 Maringa, Parana, Brazil.
Department of Chemistry, State University of Maringa, Av. Colombo, 5790, CEP 87020-900 Maringa, Parana, Brazil.
出版信息
Int J Biol Macromol. 2020 Jun 1;152:272-279. doi: 10.1016/j.ijbiomac.2020.02.249. Epub 2020 Feb 24.
Guava is a perishable fruit susceptible to post-harvest losses. So, the development of biodegradable films based on acetylated cassava starch (ACS) and hydroxyethyl cellulose (HEC) could be an alternative to increase guavas (Psidium guajava L.) shelf life. Films were characterized by solubility, opacity, water vapor transport, and thickness. Mass loss, texture, titratable acidity, soluble solids, vitamin C, and skin color of the fruits were analyzed. The films with higher HEC concentration were more transparent and hygroscopic. Guava coated with 75% HEC and 25% ACS or 100% HEC films increased firmness, maintained green skin color and reduced ripeness, lasting for 13 days, ensuring that the ACS and HEC based films can increase guavas shelf life, besides decrease environmental impacts of non-biodegradable packages.
番石榴是一种易腐的水果，容易在收获后损失。因此，开发基于乙酰化木薯淀粉（ACS）和羟乙基纤维素（HEC）的可生物降解薄膜可能是增加番石榴（Psidium guajava L.）保质期的一种替代方法。薄膜的特性包括溶解度、不透明度、水蒸气传输和厚度。分析了果实的失重、质地、滴定酸度、可溶性固形物、维生素 C 和果皮颜色。HEC 浓度较高的薄膜更透明和吸湿。用 75% HEC 和 25% ACS 或 100% HEC 涂层处理的番石榴增加了硬度，保持了绿色的果皮颜色，延缓了成熟，持续了 13 天，确保了 ACS 和 HEC 基薄膜可以延长番石榴的保质期，同时减少不可生物降解包装对环境的影响。
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