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Table 3 The proximate chemical composition of soymilk yogurt before and after enzyme treatment during the storage for two weeks at 4 °C

From: Biochemical characterization and insights into the potency of the acidic Aspergillus niger NRC114 purified α-galactosidase in removing raffinose family oligosaccharides from soymilk yogurt

Sample

Proximate composition (g/100 g)/Storage time (days)

Zero

7

14

Moisture

Soymilk yogurt

86.57 ± 0.15b

89.13 ± 0.08b

89.75 ± 0.07b

Treated soymilk yogurt

87.43 ± 0.09a

88.57 ± 0.04b

89.62 ± 0.12b

Total solids

Soymilk yogurt

14.28 ± 0.07b

10.87 ± 0.08b

10.28 ± 0.06b

Treated soymilk yogurt

13.16 ± 0.03c

10.23 ± 0.04b

10.59 ± 0.3b

Protein

Soymilk yogurt

4.79 ± 0.01b

4.39 ± 0.02b

3.85 ± 0.02b

Treated soymilk yogurt

3.48 ± 0.01a

3.26 ± 0.01a

3.19 ± 0.01c

Fat

Soymilk yogurt

3.76 ± 0.02b

3.57 ± 0.03a

3.15 ± 0.09b

Treated soymilk yogurt

4.18 ± 0.03a

3.72 ± 0.01b

2.84 ± 0.05a

Ash

Soymilk yogurt

0.67 ± 0.01b

0.52 ± 0.01b

0.48 ± 0.07b

Treated soymilk yogurt

0.74 ± 0.02c

0.68 ± 0.02c

0.55 ± 0.09c

Carbohydrates

Soymilk yogurt

4.21 ± 0.05b

2.39 ± 0.02b

2.82 ± 0.02b

Treated soymilk yogurt

4.17 ± 0.04b

3.77 ± 0.03c

3.80 ± 0.03c

pH

Soymilk yogurt

3.78 ± 0.01b

3.65 ± 0.01b

3.47 ± 0.02b

Treated soymilk yogurt

4.39 ± 0.02a

4.19 ± 0.03a

4.08 ± 0.06a

TTA (g/L)

Soymilk yogurt

2.16 ± 0.02b

2.17 ± 0.04b

2.69 ± 0.03b

Treated soymilk yogurt

1.23 ± 0.02a

1.24 ± 0.03a

1.26 ± 0.05a

Phytochemicals (Total phenols, µg/g)

Soymilk yogurt

52.68 ± 0.08b

56.97 ± 0.03b

60.34 ± 0.14b

Treated soymilk yogurt

58.73 ± 0.11c

61.24 ± 0.05c

63.67 ± 0.09c

Total flavonoids (µg/g)

Soymilk yogurt

39.43 ± 0.07b

42.86 ± 0.07b

45.62 ± 0.10b

Treated soymilk yogurt

43.42 ± 0.09c

47.52 ± 0.09c

49.81 ± 0.12c

Antioxidant activity

Ferric-Reducing power (μg of ascorbic acid equivalents/mL)

Soymilk yogurt

124.7 ± 0.40b

138.4 ± 0.09b

142.8 ± 0.32b

Treated soymilk yogurt

125.2 ± 0.18b

141.2 ± 0.05c

143.9 ± 0.15b

ABTS assay (μg of ascorbic acid equivalents/mL)

Soymilk yogurt

105.3 ± 0.21b

109.5 ± 0.17b

110.5 ± 0.16b

Treated soymilk yogurt

107.6 ± 0.17c

111.3 ± 0.15c

112.4 ± 0.18c

  1. Values are expressed as Mean ± SD