FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (4): 268-271.doi: 10.7506/spkx1002-6300-201004064

• Packaging & Storage • Previous Articles     Next Articles

Effect of Microwave Treatment on Shelf-life Quality of Pomegranate Fruits

ZHANG Li-hua1,2,YANG Xue-mei1,ZHANG Yuan-hu1,*   

  1. 1. State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai an 271018, China;
    2. Department of Agriculture, Zaozhuang Vocational College, Zaozhuang 277019, China
  • Received:2009-05-18 Revised:2009-09-18 Online:2010-02-15 Published:2010-12-29
  • Contact: ZHANG Yuan-hu E-mail:yhzhang9@163.com

Abstract:

Freshly harvest pomegranate fruits with above 90% maturity degree were irradiated in a microwave oven, preserved at 4-8 ℃ for 3 months, and stored at 20 ℃, a simulated shelf-life condition. Physicochemical indexes of microwave-irradiated pomegranate fruits were measured at regular intervals of 3 d during shelf storage to examine the effect of microwave treatment on shelf-life quality of pomegranate fruits. Results showed that microwave irradiation for a transient period of 10-20 s inhibited peel polyphenol oxidase (PPO) activity and browning of pomegranate fruits, delayed the decreases of peel polyphenols and titratable acid (TA), and increased soluble solid content (SSC). However, serious browning associated with heat injury appeared when microwave irradiation time was over 20 s. Thus, 10-20 s should be appropriate time for microwave irradiation.

Key words: microwave, pomegranate, shelf-life, quality

CLC Number: