3.1. Color parameters
Fig. 1 shows color parameters (L*C*h) for control, vacuumpacked
and pressurized samples during storage at 10 C for 21
days. Over the entire period, L* and C* values were significantly
(p < 0.05) lower in the vacuum-packed (V) and pressurized samples
(V-P) than in the control (C). This difference was visually perceived
as a translucent and moisturized aspect of the fruit surface.
On the other hand, pressurized cubes (V-P) maintained values of
h higher than control and vacuum-packed samples during the
whole storage period, although this difference become statistically
significant (p < 0.05) only towards the end of the period evaluated.
The development of enzymatic browning is generally reflected
by a decrease in both L* value (which can be associated to the
darkening of the fruit), and h angle (which was linked to the
browning at the surface) (Rocha & Morais, 2003). The fact that no
sample had in the present research showed a decrease in these
parameters evidences that enzymatic browning was effectively
controlled. Since samples inside the vacuum packaging are exposed
to an oxygen-free environment, enzymatic browning was probably
inhibited because of the exclusion of this gas, necessary for the
browning reaction
3.1. Color parametersFig. 1 shows color parameters (L*C*h) for control, vacuumpackedand pressurized samples during storage at 10 C for 21days. Over the entire period, L* and C* values were significantly(p < 0.05) lower in the vacuum-packed (V) and pressurized samples(V-P) than in the control (C). This difference was visually perceivedas a translucent and moisturized aspect of the fruit surface.On the other hand, pressurized cubes (V-P) maintained values ofh higher than control and vacuum-packed samples during thewhole storage period, although this difference become statisticallysignificant (p < 0.05) only towards the end of the period evaluated.The development of enzymatic browning is generally reflectedby a decrease in both L* value (which can be associated to thedarkening of the fruit), and h angle (which was linked to thebrowning at the surface) (Rocha & Morais, 2003). The fact that nosample had in the present research showed a decrease in theseparameters evidences that enzymatic browning was effectivelycontrolled. Since samples inside the vacuum packaging are exposedto an oxygen-free environment, enzymatic browning was probablyinhibited because of the exclusion of this gas, necessary for thebrowning reaction
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