Firmness. Firmness values of cherries decreased during
storage time both at ambient and cold temperatures. At
the same time, as the SemperfreshTM coating (SE)
concentration increased, the firmness values increased.
Retention of firmness can be explained by retarded
degradation of insoluble protopectins to the more
soluble pectic acid and pectin. During fruit ripening,
depolymerization or shortening of chain length of pectin
substances occurs with an increase in pectinesterase and
polygalactronase activities. Low oxygen and high
carbon dioxide concentrations reduce the activities of
these enzymes and allows retention of the firmness of
fruits and vegetables during storage (Salunkhe et al.,
1991). As seen in Fig. 1a and b, for both the storage
conditions, the firmness values of cherries were
significantly different at a level of Po0.05. Cherries
stored at 0 1C had higher firmness values than cherries
stored at ambient temperature. So, cold temperature
had a strong effect on the retention of firmness values
which was revealed by the statistical analysis.
Firmness. Firmness values of cherries decreased during
storage time both at ambient and cold temperatures. At
the same time, as the SemperfreshTM coating (SE)
concentration increased, the firmness values increased.
Retention of firmness can be explained by retarded
degradation of insoluble protopectins to the more
soluble pectic acid and pectin. During fruit ripening,
depolymerization or shortening of chain length of pectin
substances occurs with an increase in pectinesterase and
polygalactronase activities. Low oxygen and high
carbon dioxide concentrations reduce the activities of
these enzymes and allows retention of the firmness of
fruits and vegetables during storage (Salunkhe et al.,
1991). As seen in Fig. 1a and b, for both the storage
conditions, the firmness values of cherries were
significantly different at a level of Po0.05. Cherries
stored at 0 1C had higher firmness values than cherries
stored at ambient temperature. So, cold temperature
had a strong effect on the retention of firmness values
which was revealed by the statistical analysis.
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