บทคัดย่องานวิจัย

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A tentative model to describe the respiration of stored apples.

Andrich, G., Fiorentini, R., Tuci, A., Zinnai, A. and Sommovigo, G.

Journal of the American Society for Horticultural Science. Volume 116, Number 3, May 1991. Pages 478-481.

1991

บทคัดย่อ

A tentative model to describe the respiration of stored apples.

Using mathematical equations that describe the O2 mass-transfer and the enzymatic oxidation of the organic substrates of apples (Malus domestica Borkh.), we developed a kinetic model to correlate fruit respiration rate with environmental oxygen partial pressure (PO2). The kinetic determinations were carried out at room temperature using apples stored at 3 to 4C for 11 to 19 weeks. Results show that: 1) the calculated value of the Michaelis-Menten constant related to the enzymatic oxidation of the respiratory substrate (Km = 2.1 +/- 0.5.10-5 mol.kg-1) is close to that reported in the literature for cytochrome-c oxidase; 2) the located range of PO2 levels where O2 becomes the limiting factor in the respiration process (near 2.6 kPa at T = 20.5 +/- 1C) is close to those usually used on a commercial scale for controlled atmosphere storage.