The Effect of Chitosan-Based Nano-Emulsion Coating on Extending the Shelf Life of Apple var. Golab Kohanz

Document Type : Research Paper

Authors

1 MSc Graduate, Department of Food Science and Technology, College of Agriculture and Natural Resources, Yazd Science and Research Branch, Islamic Azad University

2 Associate Professor, Department of Food Engineering and Postharvest Technology, Agricultural Engineering Research Institute

3 Assistant Professor, Department of Food Science and Technology, College of Agriculture and Natural Resources, Yazd Science and Research Branch, Islamic Azad University

Abstract

The effects of a nano-emulsion chitosan-based coating on enhancing the shelf-life and quality of Golab Kohanz apples were studied. The nano-emulsion coating containing Chitosan with a concentration of 2000 ppm was applied for coating of Golab Kohanz apples. Coated and uncoated apples were packed in normal packaging cardboards and kept at 2 ± 1 °C with a relative humidity within 80-85%. Flesh firmness, the activity of polyphenol oxidase, flesh and skin colors, the rate of respiration based on the level of CO2 produced and the sensory characteristics of the coated vs. uncoated apples were recorded during a ten week of storage period at some specified intervals of one week. The results indicated that the coatings had no significant effect on flesh firmness and sensory characteristics of the apples, while the respiration rate of the coated apples decreased up to 50% with the coating lowering the respiration peak significantly. The polyphenol oxidase activity and the browning of the flesh increased significantly in uncoated apples following the respiration peak. Overall, results showed that the nano-emulsion chitosan-based coating can help increase the storage life of the apple.

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References

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Iranian Journal of Biosystems Engineering
Volume 45, Issue 2 - Serial Number 2
Autumn & Winter
October 2014
Pages 113-120

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History

  • Receive Date: 29 December 2013
  • Revise Date: 04 August 2014
  • Accept Date: 06 August 2014

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