Optimization Conditions of Ultrasound-Assisted Extraction for Phenolic Compounds and Antioxidant Activity from Rubus alceifolius Poir Leaves
Table 2
Results of the ANOVA for the response surface quadratic model.
Source
Total phenolic content (TPC)
Antioxidant activity (ABTS)
Parameter estimate
SS
DF
MS
value
value
Parameter estimate
SS
DF
MS
value
value
Model
16.10
221.72
9
24.635
48.27
<0.0001
21.16
445.05
9
49.45
35.03
<0.001
0.733
3.605
1
3.605
7.06
0.032
1.06
8.95
1
8.95
6.34
0.04
-1.30
12.777
1
12.78
25.04
0.001
-2.7
58.16
1
58.16
41.2
<0.001
0.265
0.4608
1
0.4608
0.904
0.374
-0.25
0.495
1
0.495
0.35
0.573
-1.23
6.0516
1
6.0516
11.857
0.0108
-1.18
5.59
1
5.59
3.96
0.087
-2.89
30.636
1
30.637
60.028
<0.0001
-4.90
96.14
1
96.14
68.1
<0.001
-1.35
6.477
1
6.477
12.691
0.009
-2.13
18.23
1
18.23
12.92
0.0008
-2.86
33.817
1
33.818
66.261
<0.0001
-4.09
70.28
1
70.28
49.78
<0.0001
-3.58
54.842
1
54.842
107.456
<0.0001
-4.31
78.14
1
78.14
55.35
0.0001
-3.76
56.295
1
56.295
110.303
<0.0001
-4.41
82
1
82
58.09
0.0001
Residual
3.573
7
0.511
9.88
7
1.41
LOF
2.669
3
0.8897
3.939
0.109
6.77
3
2.26
2.9
0.166
0.984
0.97
Adj
0.964
0.95
Pred
0.804
0.75
C.V
5.87
7.85
Df: degree of freedom; SS: sum of squares; MS: mean square; : coefficient of determination; Adj: adjusted ; Predicted : Pred ; indicates statistical significance. stands for insignificant differences ().
