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A continuum model for transport of metabolic gases in pear fruit.

Author(s) : HO Q. T., VERLINDEN B. E., VERBOVEN P., et al.

Summary

A convection-diffusion-reaction model was developed to study gas transport in intact pears at the macroscopic level. Convective transport was assumed to be pressure driven and was modelled by means of Darcy's law. The respiration of the tissue was modelled by means of Michaelis-Menten type kinetics incorporating non-competitive inhibition of CO2. All model parameters were estimated from independent measurements on disk-shaped samples. Geometrical models of pears were constructed using a machine vision system. Predicted gas exchange of whole intact fruits using the finite element method was validated successfully under steady and unsteady conditions. The higher Michaelis-Menten constant of intact fruit compared to that of small tissue samples could be attributed to the gas transport barrier properties of tissue. Also, the fruit size has a considerable effect on local respiratory gas concentrations and, hence, may contribute to the development of storage disorders such as core breakdown in pome fruit.

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Pages: ICR07-C2-591

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Details

  • Original title: A continuum model for transport of metabolic gases in pear fruit.
  • Record ID : 2008-0278
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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