Some packaging and storage techniques for fresh-cut produce (e.g., MAP, refrigerated storage)
may slow the rate of physical deterioration by slowing respiration of the produce. However, if
packaging and storage are not properly controlled, pathogens may grow to levels that could
render the product unsafe for human consumption. Water loss from fresh cut fruits occurs in both
liquid (due to juice leakage from the vacuoles of the damaged cells) and in vapour form (due to
vapour pressure difference between the cells and their microenvironment within the package).
16
Water vapour loss from the fruit tissue during storage can be minimized by proper packaging to
provide a barrier and most importantly by cooling the product to 5 ºC (41 ºF) or lower (Kader,
2004). The same results can be achieved by maintaining such temperatures plus a relative
humidity of 95 % or higher during handling. Since all the cells are connected, water can move
from one cell to another and once the outer layer of cells loses water, water will move from the
adjacent layer of cells to the outer layer to the outside of the tissue (Kader, 2004). Juice leakage
can be reduced by using firm fruits, by using sharp knives to reduce cell damage upon cutting,
and by minimizing mechanical damage caused by compression and vibration during packaging
and subsequent handling. Immobilizing the fruit pieces within the package can help in reducing
juice leakage due to vibration (Kader, 2004). It can also be achieved by the use of mild pre-heat
treatment (Lamikanra et al., 2005).
Some packaging and storage techniques for fresh-cut produce (e.g., MAP, refrigerated storage)
may slow the rate of physical deterioration by slowing respiration of the produce. However, if
packaging and storage are not properly controlled, pathogens may grow to levels that could
render the product unsafe for human consumption. Water loss from fresh cut fruits occurs in both
liquid (due to juice leakage from the vacuoles of the damaged cells) and in vapour form (due to
vapour pressure difference between the cells and their microenvironment within the package).
16
Water vapour loss from the fruit tissue during storage can be minimized by proper packaging to
provide a barrier and most importantly by cooling the product to 5 ºC (41 ºF) or lower (Kader,
2004). The same results can be achieved by maintaining such temperatures plus a relative
humidity of 95 % or higher during handling. Since all the cells are connected, water can move
from one cell to another and once the outer layer of cells loses water, water will move from the
adjacent layer of cells to the outer layer to the outside of the tissue (Kader, 2004). Juice leakage
can be reduced by using firm fruits, by using sharp knives to reduce cell damage upon cutting,
and by minimizing mechanical damage caused by compression and vibration during packaging
and subsequent handling. Immobilizing the fruit pieces within the package can help in reducing
juice leakage due to vibration (Kader, 2004). It can also be achieved by the use of mild pre-heat
treatment (Lamikanra et al., 2005).
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