Table 2
Central composite design and experimental data obtained for the response variables.
Run
no.
Independent variables Blocks Response variables
Steam
pressure
(kPa)
Rotation
speed of
drum (rpm)
Moisture
content
(%)
Water
activity,
aw
Solubility index
(ml of sediment/50
ml of solution)
Hunter L–a–b colour index Quantitative Descriptive Analysis (QDA) Hedonic test
L a b Yellowness Fruitiness Processed flavour
1 þ1 þ1 1 7.2122 0.274 7.9 79.81 3.49 25.57 3.9 4.7 3.5 6.3
2 þ1 1 1 4.8549 0.182 8.0 70.19 6.88 22.29 8.7 2.1 6.5 2.0
3 þ1 0 2 6.2023 0.254 8.1 75.97 5.03 23.25 6.3 4.1 4.7 4.4
4 1 þ1 1 10.0097 0.361 8.5 74.79 3.84 27.52 3.4 5.9 3.0 6.9
5 1 1 1 5.7479 0.267 8.1 77.98 4.18 24.89 3.9 6.1 3.0 5.6
6 1 0 2 9.2603 0.340 9.6 75.60 5.22 26.67 5.1 5.7 3.1 7.1
7 0 þ1 2 9.0060 0.291 9.2 74.68 6.74 25.87 5.5 4.5 3.0 7.4
8 0 1 2 5.5345 0.157 9.3 73.81 5.88 23.24 7.7 4.1 5.0 3.1
9a 0 0 2 7.2126 0.242 9.6 79.20 3.97 25.18 5.8 4.7 3.0 6.3
10a 0 0 2 7.4039 0.250 8.8 77.41 3.53 25.40 3.8 4.4 3.1 6.0
11a 0 0 2 7.7865 0.231 9.0 78.37 3.37 24.57 3.6 5.2 3.1 6.3
12a 0 0 1 6.1435 0.237 8.2 79.26 3.59 25.41 3.7 4.6 2.6 6.5
13a 0 0 1 6.3173 0.239 8.2 79.16 3.71 25.39 3.6 4.9 3.2 6.8
14a 0 0 1 5.9935 0.239 8.3 79.46 3.61 25.19 3.7 4.2 2.9