期刊
LWT-FOOD SCIENCE AND TECHNOLOGY
卷 44, 期 10, 页码 2328-2334出版社
ELSEVIER
DOI: 10.1016/j.lwt.2011.03.011
关键词
Water vapor permeability; Oxygen permeability; Mechanical properties; Postharvest quality; Plum
资金
- Spanish Ministerio de Ciencia y Tecnologia [AGL 202-00560]
The effect of beeswax (BW) content of hydroxypropyl methylcellulose (HPMC)-BW edible coatings on stand-alone film properties and on postharvest quality of coated 'Angeleno' plums was studied. The coatings contained BW at 4 lipid content levels (0, 20,40 and 60 g/100 g, dry basis). Coated and uncoated plums were stored 4 weeks at 1 degrees C and transferred to 20 degrees C for 1-3 weeks. Addition of BW to the HPMC film matrix reduced film mechanical resistance and oxygen barrier, and improved film moisture barrier. Film mechanical properties showed a good fit with an exponential and/or linear model that could provide a useful tool to predict mechanical properties with others HPMC BW composition mixtures. Coatings with BW reduced plum weight loss compared to HPMC-based coatings with no BW. Plum weight loss decreased as BW content increased from 20 to 40 g/100 g, but above 40 g/100 g BW content, weight loss was not further reduced. Whereas, water vapor permeability of stand-alone films decreased significantly as BW content increased to 60 g/100 g. Coatings reduced plum softening and bleeding, with those with lower BW content being more effective, which could be related to the ability of coatings to create a modified atmosphere in the fruit. Flavor was not affected by coating application. Results indicate that HPMC BW coatings with 20 g/100 g BW would provide the best compromise to extend shelf life of 'Angeleno' plums. (C) 2011 Elsevier Ltd. All rights reserved.
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