Antifungal activities of combined treatments of irradiation and essential oils (EOs) encapsulated chitosan nanocomposite films in in vitro and in situ conditions

被引:87
作者
Hossain, Farah [1 ]
Follett, Peter [2 ]
Salmieri, Stephane [1 ]
Khanh Dang Vu [1 ]
Fraschini, Carole [3 ]
Lacroix, Monique [1 ]
机构
[1] INRS Inst Armand Frappier, Res Labs Sci Appl Food, Canadian Irradiat Ctr, 531 Prairies Blvd, Laval, PQ H7V 1B7, Canada
[2] USDA ARS, US Pacific Basin Agr Res Ctr, Hilo, HI 96720 USA
[3] FPInnovations, 570 Blvd St Jean, Pointe Claire, PQ H9R 3J9, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Active packaging; Nanoemulsion; gamma radiation; Antifungal activity; Release of volatile components; NANOCRYSTALS PLA-CNC; BASIL ESSENTIAL OIL; LISTERIA-MONOCYTOGENES; BARRIER PROPERTIES; EDIBLE FILMS; EVOH FILMS; RELEASE; NANOPARTICLES; INACTIVATION; RADIATION;
D O I
10.1016/j.ijfoodmicro.2019.02.009
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Cellulose nanocrystals (CNCs) reinforced chitosan based antifungal films were prepared by encapsulating essential oils (EOs) nanoemulsion. Vapor phase assays of the chitosan-based nanocomposite films loaded with thyme-oregano, thyme-tea tree and thyme-peppermint EO mixtures showed significant antifungal activity against Aspergillus niger, Aspergillus flovus, Aspergillus parasiticus, and Penicillium cluysogenum, reducing their growth by 51-77%. Combining the bioactive chitosan films loaded with thyme and oregano EOs produced 2 log reduction in fungal growth in inoculated rice during 8 weeks of storage at 28 degrees C. The bioactive films showed a slow release (26%) of volatile components over 12 weeks of storage. Sensorial evaluation of rice samples packed with the bioactive films showed no significant change in odor, taste, color and general appreciation compared with untreated rice. Incorporation of cellulose nanocrystals (CNCs) with the chitosan matrix played an important role in stabilizing the physicochemical and release properties of the nanocomposite films. In addition, combining the bioactive chitosan films with a dose of 750 Gy of ionizing radiation showed significantly higher antifungal and mechanical properties than treatment with the bioactive film or irradiation alone.
引用
收藏
页码:33 / 40
页数:8
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