Antioxidant Capacity of Strawberry Beverages (Unprocessed
and Processed) after 5 Weeks of Storage. All
samples were sealed under aseptic conditions and stored in
refrigerated conditions (4 °C) after different processing
treatments. Irrespective of treatment, the ORAC values of all
beverage samples were significantly lower after 5 weeks of
storage at 4 °C (P < 0.05). After an initial decline in antioxidant
capacity that occurred from week 0 (prior to the storage) to
week 2, ORAC values remained stable during the second to
fifth weeks of storage (data are not shown). Samples processed
by HTST compared to HPP had significantly greater reduction
in ORAC from baseline to week 5 (P < 0.05) (Table 3A).
FRAP values of all HTST-treated beverages were significantly
decreased at the end of week 1 of storage compared to
FRAP values at week 0 (P < 0.05, data are not shown). In
contrast, unprocessed and HPP-treated D-NStr and D-Str
beverages showed no significant changes in FRAP after 1 week
of storage compared to week 0. ND-Str (unprocessed, HPPand
HTST-treated) beverage samples had significantly lower
FRAP values at the end of the first week of storage compared to
week 0 values (data are not shown). As observed with ORAC,
FRAP values were relatively stable during the second to fifth
weeks of storage at 4 °C (P > 0.05). Significantly reduced
FRAP values were observed with HTST processing compared
to HPP treatment in all beverage samples at the end of the fifth
week compared week 0 (Table 3B).
Antioxidant Capacity of Strawberry Beverages (Unprocessed
and Processed) after 5 Weeks of Storage. All
samples were sealed under aseptic conditions and stored in
refrigerated conditions (4 °C) after different processing
treatments. Irrespective of treatment, the ORAC values of all
beverage samples were significantly lower after 5 weeks of
storage at 4 °C (P < 0.05). After an initial decline in antioxidant
capacity that occurred from week 0 (prior to the storage) to
week 2, ORAC values remained stable during the second to
fifth weeks of storage (data are not shown). Samples processed
by HTST compared to HPP had significantly greater reduction
in ORAC from baseline to week 5 (P < 0.05) (Table 3A).
FRAP values of all HTST-treated beverages were significantly
decreased at the end of week 1 of storage compared to
FRAP values at week 0 (P < 0.05, data are not shown). In
contrast, unprocessed and HPP-treated D-NStr and D-Str
beverages showed no significant changes in FRAP after 1 week
of storage compared to week 0. ND-Str (unprocessed, HPPand
HTST-treated) beverage samples had significantly lower
FRAP values at the end of the first week of storage compared to
week 0 values (data are not shown). As observed with ORAC,
FRAP values were relatively stable during the second to fifth
weeks of storage at 4 °C (P > 0.05). Significantly reduced
FRAP values were observed with HTST processing compared
to HPP treatment in all beverage samples at the end of the fifth
week compared week 0 (Table 3B).
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