ruising significantly affected the chemical
composition of pericarp and locular tissues of
tomato fruit. Vitamin C content was about 15%
lower in bruised locular tissue than unbruised
fruit (Moretti et al., 1998). AA retention in shred-ded iceberg lettuce is affected by the nature of the
slicing method used. Higher levels of AA were
retained in samples that had been prepared by
manually tearing the lettuce into strips. Lettuce
shredded using a sharp knife retained initially
18% less AA than the torn samples. The retention
of AA in the products sliced by machine was
25 – 63% lower than lettuce shredded by manual
tearing. Using a blunt machine blade resulted in
10% lower AA levels than when a sharp blade was
used (Barry-Ryan and O’Beirne, 1999). Excessivetrimming of leafy vegetables results in loss of
outer green leaves which contain more vitamins
than inner leaves. Trimming of outer leaves and
of the core and associated inner leaves of Chinese
cabbage had a greater effect on reduction of
vitamin C content than storage at 4°C for 11 days
(Klieber and Franklin, 2000). Losses in vitamin C
occur when vegetables are severely cut or shred-ded, as in the case of cabbage, lettuce, carrots,
and other vegetables sold as salad mixes (Moza-far, 1994). Green peas and green lima beans retain
their nutrients better if left in the pods than if
shelled.
ruising significantly affected the chemical
composition of pericarp and locular tissues of
tomato fruit. Vitamin C content was about 15%
lower in bruised locular tissue than unbruised
fruit (Moretti et al., 1998). AA retention in shred-ded iceberg lettuce is affected by the nature of the
slicing method used. Higher levels of AA were
retained in samples that had been prepared by
manually tearing the lettuce into strips. Lettuce
shredded using a sharp knife retained initially
18% less AA than the torn samples. The retention
of AA in the products sliced by machine was
25 – 63% lower than lettuce shredded by manual
tearing. Using a blunt machine blade resulted in
10% lower AA levels than when a sharp blade was
used (Barry-Ryan and O’Beirne, 1999). Excessivetrimming of leafy vegetables results in loss of
outer green leaves which contain more vitamins
than inner leaves. Trimming of outer leaves and
of the core and associated inner leaves of Chinese
cabbage had a greater effect on reduction of
vitamin C content than storage at 4°C for 11 days
(Klieber and Franklin, 2000). Losses in vitamin C
occur when vegetables are severely cut or shred-ded, as in the case of cabbage, lettuce, carrots,
and other vegetables sold as salad mixes (Moza-far, 1994). Green peas and green lima beans retain
their nutrients better if left in the pods than if
shelled.
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