Table 3 Enthalpy change of native and retrograded starches.

From: Retrogradation enthalpy does not always reflect the retrogradation behavior of gelatinized starch

Starch

Water content/%

ΔHGJ/g

aΔHR J/g

bΔHR J/g

DR%

Rice starch

33

2.6 ± 0.1a

3.9 ± 0.0c

4.2 ± 0.2a

153.1 ± 5.7f

 

43

4.6 ± 0.1b

5.6 ± 0.2e

5.2 ± 0.4b

121.9 ± 3.4e

 

50

5.5 ± 0.1c

7.0 ± 0.4f

6.6 ± 0.0b

82.8 ± 5.0d

 

60

14.0 ± 0.2d

4.7 ± 0.4d

4.6 ± 0.1a

33.3 ± 2.7c

 

71

14.4 ± 0.7d

1.4 ± 0.2b

nm

9.9 ± 0.6b

 

80

14.3 ± 0.2d

0a

nm

0a

Wheat starch

33

2.9 ± 0.0a

6.2 ± 0.2e

4.4 ± 0.5b

214.8 ± 5.0e

 

43

4.1 ± 0.1b

6.0 ± 0.0e

4.6 ± 0.7b

146.1 ± 2.5d

 

50

5.5 ± 0.0c

5.5 ± 0.1d

4.1 ± 0.3b

100.1 ± 2.3c

 

60

8.5 ± 0.1d

2.6 ± 0.4c

3.3 ± 0.1a

30.5 ± 4.4b

 

71

10.7 ± 0.4e

1.8 ± 0.1b

nm

16.4 ± 0.3a

 

80

10.7 ± 1.1e

0.5 ± 0.0a

nm

4.7 ± 0.3a

  1. Values are means ± SD. Values with the same letters in the same column for each starch are not significantly different (p < 0.05).
  2. a: reheating retrograded starch gels; b: reheating retrograded starch powders/water mixtures; DR% was calculated based on the enthalpy change of regrograded starch gels.
  3. nm: not measured.