for Eqs. 1, 2 and 3, respectively. To DE* calculation, the individual
differences in L, a, and b values of each treatment with
respects to the color of the fresh sample were evaluated.
h
ab ¼ arctga
b
(1)
C
ab ¼
a2 þ b21=2 (2)
DE ¼
ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi
ðDLÞ
2 þ ðDaÞ
2 þ ðDbÞ
2
q
(3)
A Texture Analyzer TA-XT2 (Stable Micro Systems, Haslemere,
U.K.) evaluated sample firmness using a sharp knife
with a force of 0.006 N and a test speed set at 1.0 mm s1
. The
parameter considered was the maximum peak force per gram
of sample (N ge1
). Ten replicates were performed for each
treatment.