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Sensors (Basel). 2016 Jul 18;16(7). pii: E1111. doi: 10.3390/s16071111.

Preservation Mechanism of Chitosan-Based Coating with Cinnamon Oil for Fruits Storage Based on Sensor Data.

Author information

1
Sichuan Province Key Laboratory of Grain and Oil Processing and Food Safety, Food and Bioengineering College, Xihua University, Chengdu 610039, China. xingyage1@163.com.
2
Sichuan Province Key Laboratory of Grain and Oil Processing and Food Safety, Food and Bioengineering College, Xihua University, Chengdu 610039, China. xuqinglian01@163.com.
3
School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada. syang@uoguelph.ca.
4
Key Laboratory of Physiological and Storage of Agricultural Products after Harvest in the Ministry of Agriculture, National Engineering Technology Research Center for Preservation of Agricultural Products, Tianjin 300384, China. cck0318@126.com.
5
Sichuan Province Key Laboratory of Grain and Oil Processing and Food Safety, Food and Bioengineering College, Xihua University, Chengdu 610039, China. Tangbohu3@163.com.
6
Sichuan Province Key Laboratory of Grain and Oil Processing and Food Safety, Food and Bioengineering College, Xihua University, Chengdu 610039, China. ssmin2000@163.com.
7
Sichuan Province Key Laboratory of Grain and Oil Processing and Food Safety, Food and Bioengineering College, Xihua University, Chengdu 610039, China. zhangliang1872@163.com.
8
Sichuan Province Key Laboratory of Grain and Oil Processing and Food Safety, Food and Bioengineering College, Xihua University, Chengdu 610039, China. chezhenming@163.com.
9
Food Engineering and Biotechnology College, Tianjin University of Science & Technology, Tianjin 300457, China. lixihong6061@aliyun.com.

Abstract

The chitosan-based coating with antimicrobial agent has been developed recently to control the decay of fruits. However, its fresh keeping and antimicrobial mechanism is still not very clear. The preservation mechanism of chitosan coating with cinnamon oil for fruits storage is investigated in this paper. Results in the atomic force microscopy sensor images show that many micropores exist in the chitosan coating film. The roughness of coating film is affected by the concentration of chitosan. The antifungal activity of cinnamon oil should be mainly due to its main consistent trans-cinnamaldehyde, which is proportional to the trans-cinnamaldehyde concentration and improves with increasing the attachment time of oil. The exosmosis ratios of Penicillium citrinum and Aspergillus flavus could be enhanced by increasing the concentration of cinnamon oil. Morphological observation indicates that, compared to the normal cell, the wizened mycelium of A. flavus is observed around the inhibition zone, and the growth of spores is also inhibited. Moreover, the analysis of gas sensors indicate that the chitosan-oil coating could decrease the level of O₂ and increase the level of CO₂ in the package of cherry fruits, which also control the fruit decay. These results indicate that its preservation mechanism might be partly due to the micropores structure of coating film as a barrier for gas and a carrier for oil, and partly due to the activity of cinnamon oil on the cell disruption.

KEYWORDS:

chitosan coating; cinnamon oil; preservation mechanism; sensor data

PMID:
27438841
PMCID:
PMC4970155
DOI:
10.3390/s16071111
[Indexed for MEDLINE]
Free PMC Article

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