Table 1 Rheological properties of native and modified DASP from apple and carrot. G′, elastic (storage) modulus; G″, viscous (loss) modulus; tan δ, loss factor; K, consistency coefficient; n, flow index; G0, initial shear stress.

From: Effect of enzymatic modification on the structure and rheological properties of diluted alkali-soluble pectin fraction rich in RG-I

Parameter

Unit

Pectin source

Apple

Carrot

BUFFER

E1 (RGAE + RGL)

E2 (ABF)

E3 (RGAE + RGL + ABF)

BUFFER

E1 (RGAE + RGL)

E2 (ABF)

E3 (RGAE + RGL + ABF)

G′

Pa

310.83 ± 231.30ab

1154.61 ± 139.91a

32.29 ± 17.23ab

338.77 ± 145.85ab

405.53 ± 28.92b

167.26 ± 154.87ab

43.67 ± 25.38ab

207.33 ± 119.49ab

G′/G

 

7.52 ± 3.14ab

10.74 ± 1.42b

4.38 ± 0.99ab

8.34 ± 1.43ab

6.77 ± 0.51ab

6.44 ± 1.08ab

3.51 ± 0.93a

6.93 ± 2.48ab

tan δ

 

0.14 ± 0.00abc

0.09 ± 0.01bc

0.24 ± 0.05a

0.13 ± 0.03ab

0.15 ± 0.01abc

0.16 ± 0.03abc

0.30 ± 0.07c

0.15 ± 0.07ab

Flow point

%

6.07 ± 3.83ab

5.76 ± 1.26bc

16.09 ± 4.50ab

3.77 ± 1.95a

1.93 ± 0.85a

12.85 ± 7.76abc

20.60 ± 10.64c

3.77 ± 1.62ab

Linear viscoelasticity limit

%

3.72 ± 1.83abc

1.79 ± 0.50bc

5.76 ± 2.20a

1.54 ± 0.75a

1.34 ± 0.90a

3.41 ± 1.47abc

7.20 ± 2.23c

1.88 ± 0.79ab

Power law model

 K

Pa s

2.59 ± 3.99a

1.39 ± 1.46a

0.19 ± 0.09a

2.62 ± 2.76a

9.33 ± 3.66ab

20.40 ± 13.57b

5.42 ± 2.16a

23.56 ± 12.54b

 n

 

0.56 ± 0.16bc

0.63 ± 0.19 cd

0.86 ± 0.07d

0.54 ± 0.13abc

0.41 ± 0.06abc

0.32 ± 0.14ab

0.49 ± 0.09abc

0.29 ± 0.08a

Herschel–Bulkley model

 G0

Pa

3.63 ± 5.75a

3.21 ± 4.08a

0.06 ± 0.11a

3.71 ± 5.61a

10.79 ± 6.97ab

31.17 ± 20.41bc

7.94 ± 4.57a

32.98 ± 16.12c

 K

Pa s

1.07 ± 1.16abc

0.46 ± 0.25ab

0.19 ± 0.09a

1.28 ± 0.9abc

4.76 ± 0.65d

3.07 ± 1.68 cd

2.79 ± 0.95bcd

5.08 ± 2.31d

 n

 

0.63 ± 0.12ab

0.73 ± 0.09bc

0.87 ± 0.07c

0.61 ± 0.1ab

0.50 ± 0.03a

0.59 ± 0.14ab

0.58 ± 0.05ab

0.48 ± 0.04a

Viscosity (at 10 s−1)

Pa s

0.93 ± 0.89ab

0.65 ± 0.55a

0.14 ± 0.05a

1.58 ± 1.17ab

3.13 ± 0.87bc

4.91 ± 2.08c

2.13 ± 0.77ab

5.19 ± 1.90c

Intrinsic viscosity

mg L−1

158.33

148.53

151.56

123.29

293.37

242.31

160.28

147.51

  1. Different letters indicate statistically significant differences (ANOVA, p < 0.05).