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Proceedings of the 17th IAPRI World Conference on Packaging (IAPRI 2010 E-BOOK)

Tianjin,China,10.12-10.15，2010

ISBN: 978-1-935068-36-5 Scientific Research Publishing, USA

E-Book 886pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $80

Title: Mathematical Model of Gas Exchange for Modified Atmosphere Packaging Containing Pak-choi
Source: Proceedings of the 17th IAPRI World Conference on Packaging (IAPRI 2010 E-BOOK) (pp 202-206)
Author(s): Fei Cao, Dept. of Printing Engineering Tianjin Vocational Institute Tianjin, P. R. China
Abstract: Respiration became the dominant aspects of metabolism after vegetables were harvested. The main factors affecting respiration are temperature and gas concentration of the storage environment. It is a major challenge that how to choice a plastic film with appropriate permeability coefficient for specific varieties vegetables in specific temperature. Therefore, it is the key of modified atmosphere packaging technology of vegetables that to establish mathematical model of gas exchange for modified atmosphere packaging (MAP). Based on the dynamic equilibrium theory of MAP, the variation laws of respiration rates were studied with the dynamic changes of O2 and CO2 concentration within packages at 10℃ and 20℃ respectively. The optimal simulated function expression was established. The experimental data were analyzed with SPSS for windows statistical software. The mathematical model of gas exchange within close packages was developed when the modified atmosphere packaging for Pak-choi was designed. The theoretical basis for getting a right way to choose packaging materials for MAP and predicting the gas mass concentrations inside the packages were provided.The correctness of model was verified by MAP experiments containing Pak-choi.
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