Development of stress response model for fresh fruits and vegetables: Utilization of novel modified Weibull distribution

2014 Fiscal Year Final Research Report

• Project/Area Number: 24658214
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Agricultural environmental engineering
• Research Institution: Chiba University (2014); National Agriculture and Food Research Organization (2012-2013)
• Principal Investigator: SHIINA Takeo 千葉大学, 園芸学研究科, 教授 (40353974)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ストレス応答 / 数理モデル / Weibull分布 / 修正Weibull分布モデル / 青果物 / 品質変化

Outline of Final Research Achievements

Fresh fruits and vegetables are highly perishable because of their nature and the factors affecting their quality such as shock and vibration, temperature fluctuation, loss of water and gaseous composition during transportation process. A two parameters Weibull distribution is important provability density distribution which is used as the estimation of product failure during their life time. In this study, we have proposed a novel simulation model “modified Weibull distribution, MWD” for predicting the response behavior of fresh produces against the stresses which they perceive during distribution processes. Newly developed MWD was constructed to enable to deal with the magnitude of the response of fresh produce depending on the level and kind of the stresses. Nonlinear least square method was applied to fit the gene expression level and respiration rate against the physical stress. Results showed the very good agreement between the experimental result and the estimation obtained.

Free Research Field

ポストハーベスト工学