Color evaluation
The effect of nanosystem coatings on the color and browning index
of fresh-cut apples was determined by measuring their surface color
with a Minolta CR-300 colorimeter (Konica Minolta, Tokyo, Japan)
every 3days during the 18days of storage time. Readings were obtained
on a CIELAB scale (L*, a*, b*). Three wedges from each treatment were
taken and 6 color measurements were made at 2 locations for each sample.
The browning index (BI) was calculated and was used as an indicator
of the intensity of brown discoloration. BI was calculated as follows