A Tentative Model to Describe the Respiration of Stored Apples

Abstract

<jats:p>Using mathematical equations that describe the 0<jats:sub>2</jats:sub> mass-transfer and the enzymatic oxidation of the organic substrates of apples <jats:italic>(Malus domestica</jats:italic> Borkh.), we developed a kinetic model to correlate fruit respiration rate with environmental oxygen partial pressure (PO<jats:sub>2</jats:sub>. 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 (K<jats:sub>m</jats:sub> = 2.1 ± 0.5.10<jats:sup>-5</jats:sup> mol·kg<jats:sup>-1</jats:sup>) is close to that reported in the literature for cytochrome-c oxidase; 2) the located range of PO<jats:sub>2</jats:sub> levels where 0<jats:sub>2</jats:sub> becomes the limiting factor in the respiration process (near 2.6 kPa at T = 20.5 ± lC) is close to those usually used on a commercial scale for controlled atmosphere storage.</jats:p>

Measurement and Modeling of Respiration Rate of Guava (CV. Baruipur) for Modified Atmosphere Packaging

“…The parameters of Eqs. (1) and (2) may be estimated by linearization of the equation and subsequent linear regression analysis [25,32,34,35,[38][39][40][41][42][43] or directly by non-linear regression analysis. [31,[44][45][46][47][48] However linearizing the equations is equivalent to changing the weight given to the data in the estimation procedure and thus should be avoided.…”

“…[26] Hence, the respiration rate data for guava fruits was experimentally generated for different temperatures using the closed system method [31,[33][34][35]41,42] as described in Fig. 1.…”

Modelling respiration rate of fresh fruits and vegetables for modified atmosphere packages: a review

“…(ii) flushing with a known gas mixture during a certain period of time in order to equilibrate with that atmosphere (Andrich, Fiorentini, Tuci, Zinnai, & Sommovigo, 1991;Emond et al, 1993;Lebermann, Nelson, & Steinberg, 1968;Peppelenbos & Leven, 1996;Peppelenbos, van't Leven, van Zwol, & Tijskens, 1993;Talasila, 1992).…”

“…After closing the container, one measurement of respiration rate may be determined (Andrich et al, 1991;Emond et al, 1993;Lebermann et al, 1968;Makino et al, 1996;Peppelenbos & Leven, 1996;Peppelenbos et al, 1993;Talasila, 1992) or measurements of O 2 depletion and CO 2 accumulation over time may be performed (Cameron et al, 1989;Fishman et al, 1996;Gong & Corey, 1994;Haggar et al, 1992;Henig & Gilbert, 1975;Jurin & Karel, 1963;Yang & Chinnan, 1988). This procedure has the limitation of only providing sets of concentrations, from high O 2 /low CO 2 to low O 2 /high CO 2 concentrations.…”

Modelling respiration rate of shredded Galega kale for development of modified atmosphere packaging

“…Respiration involves a very complex set of biochemical reactions, which impairs the development of mechanistic models. The Michaelis-Menten equation has been thoroughly reported in the literature as giving good fits to experimental data on respiration rate of different products (Andrich, Fiorentini, Tuci, Zinnai, & Sommovigo, 1991;Cameron, Beaudry, Banks, & Yelanich, 1994;Hertog, Peppelenbos, Evelo, & Tijkens, 1998;Joles, Cameron, Shirazi, Petracek, & Beaudry, 1994;Lee, Haggar, Lee, & Yam, 1991;Lee, Song, & Yam, 1996;McLaughlin & Berine, 1999;Peppelenbos & van't Leven, 1996;Peppelenbos, van't Leven, van Zwol, & Tijskens, 1993;Ratti, Raghavan, & Gari e epy, 1996;Solomos & Kanellis, 1989). CO 2 is often assumed to have an inhibitory effect on respiration, either uncompetitive, non-competitive or uncompetitive/competitive (Lee et al, 1991(Lee et al, , 1996McLaughlin & Berine, 1999;Peppelenbos & van't Leven, 1996;Renault, Souty, & Chambroy, 1994).…”