FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (4): 258-263.doi: 10.7506/spkx1002-6630-201104058
• Packaging & Storage • Previous Articles Next Articles
JIANG Qi-yong,LIU Meng,YANG Heng-ming,ZHOU Zhi-cai,WANG Mei-lan
Online:
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Abstract: In this paper, the fresh-keeping effect of equilibrium modified atmosphere packaging (EMAP) conditions on quality parameters of Laiyang pears was explored. Results indicated that EMAP storage maintained a good level of fruit firmness, and inhibited the activity of polyphenol oxidase (PPO). After 120 days of the storage, the control group (without any packaging treatment) showed a PPO activity of 40.9 U/g, even higher than 28.4 U/g of the EMAP group, with a significant difference (P < 0.05). EMAP treatment delayed the reduction in peroxidase (POD) activity and the increase in membrane permeability; the activity of POD in the EMAP group was 0.25 U/g, significantly higher than 0.04 U/g of the control group; and relative membrane permeability of EMAP-packaged pears was increased to a lower level after 120 days of the storage, with a smaller amplitude fluctuation over the entire storage period, and there was a extremely significant difference between the two groups (P < 0.01). A reduction in vitamin C loss was observed for the EMAP group as compared to the control. After 30 days of the storage, the content of vitamin C in the EMAP group was higher than that in the control and the difference between them was exceedingly significant (P < 0.01). The optimum gas composition for EMAP storage of Laiyang pears was found to be made up of 2.2% CO2 and 14.0% O2 or of 2.6% CO2 and 12.9% O2. The shelf life of Laiyang pears stored in two such atmospheric environments could reach up to more than 200 days.
Key words: Laiyang pear, quilibrium modified atmosphere packaging (EMAP), fresh-keeping
CLC Number:
TS255.3
S661.2
JIANG Qi-yong,LIU Meng,YANG Heng-ming,ZHOU Zhi-cai,WANG Mei-lan. Fresh-keeping Effect of Equilibrium Modified Atmosphere Packaging on Laiyang Pears[J]. FOOD SCIENCE, 2011, 32(4): 258-263.
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URL: https://www.spkx.net.cn/EN/10.7506/spkx1002-6630-201104058
https://www.spkx.net.cn/EN/Y2011/V32/I4/258