Respiration Rate of Blueberry in Modified Atmosphere at Various Temperatures

Abstract

<jats:p>Respiration rates of three blueberry <jats:italic>(Vaccinium corymbosum</jats:italic> L.) cultivars (Coville, Blueray, and Jersey) were measured as a function of O<jats:sub>2</jats:sub>, CO<jats:sub>2</jats:sub>, and temperature using the closed system method. The data conformed well to a recently proposed Michaelis-Menten type respiration (r) model (r = V<jats:sub>m</jats:sub> [O<jats:sub>2</jats:sub>]/{K<jats:sub>m</jats:sub> + (1 + [CO<jats:sub>2</jats:sub>]/K<jats:sub>i</jats:sub>)[O2]}), where V<jats:sub>m</jats:sub> was maximum respiration rate, K<jats:sub>m</jats:sub> was Michaelis-Menten constant, and K<jats:sub>i</jats:sub> was inhibition constant. The model predictions were used to examine the behavior of respiration rates. In general, the respiration rates decreased with increasing CO<jats:sub>2</jats:sub>, but were little affected by changes in O<jats:sub>2</jats:sub>. `Coville' blueberries had the highest respiration rate, followed by `Blueray' and `Jersey'. The temperature dependence of the respiration rates followed the Arrhenius relationship.</jats:p>

Respiration rate of banana fruit under aerobic conditions at different storage temperatures

“…Although, an exact transition temperature is difficult to establish from Fig. 6, it appears to be in agreement with the observation of Song et al (1992) that the transition takes place in the vicinity of 15°C…”

“…A close observation of the plot showed that the plot actually appeared to have two regions. Similar results were also observed by Song et al (1992) and Jaime et al (2001). This was attributed to a change in the rate limiting enzymatic action, as each enzyme may be affected differently by changes in temperature.…”

Modelling respiration of packaged fresh-cut ‘Rocha’ pear as affected by oxygen concentration and temperature

“…Non-competitive models published for intact 'Conference' pear (de Wild et al, 1999;Lammertyn et al, 2001Lammertyn et al, , 2003Ho et al, 2006Ho et al, , 2008 did not make K m;O 2 and K mn;CO 2 temperature-dependent. A constant K m;O 2 was obtained for ten fresh-cut vegetables (Jacxsens et al, 2000) and packaged raspberry fruit for the temperature range from 0 to 20°C (Joles et al, 1994), while for blueberry a temperature effect on K m;O 2 was found (Song et al, 1992;Cameron et al, 1994). Ho et al (2006) indicated for cortex tissue of 'Conference' pear a K m;O 2 of 1.16 kPa, similar to K m;O 2 found for fresh-cut 'Rocha' pear (Table 4).…”

Improving cranberry shelf-life using high voltage electric field treatment

“…Fruit respiration rate was monitored at weekly intervals by a static method. The berries were allowed to respire for about 6 h inside air-tight glass bottles having a silicone septum on the lid (Song et al, 1992;Ratti et al, 1996). The head space gas composition inside the bottles was analyzed using a Gas chromatograph (SRI Instruments Inc., California, USA; Model-8610A) equipped with a thermal conductivity detector.…”