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Table 2 Possible changes in fermentability and chemical composition of R. tanguticum polysaccharides during in vitro digestion and human fecal fermentation

From: Fecal fermentation characteristics of Rheum tanguticum polysaccharide and its effect on the modulation of gut microbial composition

 

In vitro digestion of RP

In vitro fermentation of RPI

RP

RPS

RPG

RPI

RPI-6 h

RPI-12 h

RPI-24 h

RPI-48 h

Fermentability (%)

–

–

–

–

44.62 ± 1.12 d

57.68 ± 1.86 c

68.34 ± 2.18 b

75.49 ± 3.14 a

Total polysaccharides (%)

85.48 ± 0.73 a

85.90 ± 1.13 a

85.98 ± 1.11 a

84.87 ± 0.51 a

48.05 ± 1.29 b

43.44 ± 1.63 bc

40.69 ± 1.25 c

38.71 ± 1.29 c

Total uronic acids (%)

38.54 ± 1.31 b

37.60 ± 2.12 b

38.15 ± 2.03 b

38.26 ± 1.06 b

57.66 ± 1.36 a

60.69 ± 1.30 a

61.21 ± 2.71 a

59.60 ± 1.29 a

Degree of esterification (%)

43.17 ± 0.54 a

45.15 ± 1.39 a

45.02 ± 0.71 a

43.38 ± 1.55 a

15.44 ± 0.61 b

12.43 ± 1.39 c

9.91 ± 0.44 c

5.56 ± 0.59 d

  1. Sample codes were the same as in Fig. 1.
  2. Values represent mean ± standard deviation, and different superscript lowercase letters indicate significant (p < 0.05) in each row