Effect of High Temperature Pretreatment and Gaseous Ozone on Storage Quality and Microbiological Safety in Fresh Ginger (Zingiber officinale Rosc.)

Abstract:

It has been investigated that the effects of high temperature pretreatment and gaseous ozone on storage quality and microbiolical changes of fresh ginger. The fresh ginger were exposed in air at 30 °C for 7 days, then were treated by gaseous ozone (4 mg/m³) for 1 hour each two days for 28 days. Pretreatment promoted wound healing of ginger rhizome section and gaseous ozone treatment inhibited microbial infection. After 28 days, the PPO activity of samples in combined application of high temperature and ozone treated group, and only ozone treated group were 2.95×10³ U and 2.80×10³ U respectively, higher than that in control of 2.50×10³ U, by 450 U and 300 U. DPPH in the two treated group were 47.38 % and 44.55 %, respectively. Total phenolic and 6-gingerol of samples in combined treated gingers were 57.33 mg/100g and 7.73 mg/g, the control was just 48.42 mg/100g and 5.89 mg/g. The level of microbiology was decreased by 1.4 log CFU/g than that of control. The results highlighted that the positive role of ozonation in combination with pretreatment storage in controlling lignification and microbial spoilage of fresh ginger. Pretreatment-gaseous ozone combined application lead to the most effective results in terms of anticorrosion associated with good results in other indexes.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 1460-1463
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.1460
• Online since: January 2013
• Authors: Xi Hong Li, Man Zhang, Wei Li Li, Ai Li Wang, Dan Zhou Liu
• Keywords: Fresh Ginger, Gaseous Ozone, High Temperature Pretreatment, Microbiological Safety, Quality

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