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Table 2 Condensed tannin and flavonol compositions of pine bark after thiolysis with benzyl mercaptan

From: The effects of tannins-containing ground pine bark diet upon nutrient digestion, nitrogen balance, and mineral retention in meat goats

Item

Pine bark

 

Total CT

Extractable CT

Unextractable CT

SD

Condensed tannins (CT)

    

 CT (Bu-HCL)

10.3

8.7

1.7

0.15

CT (Thiolysis)

    

 mDP

10.5

2.6

11.1

0.15

 %PC in CT

87.6

54.8

94.5

0.73

 %PD in CT

12.4

45.2

5.5

0.36

 % cis-flavan-3-ols in CT

76.9

48.72

80.2

0.46

 % trans-flavan-3ols in CT

23.1

51.28

19.8

0.57

Flavan-3-ol composition of CT (%)

  a GC

2.0

30.4

0.0

0.15

  a EGC

0.0

0.0

0.0

0.0

  a C

7.1

7.6

8.4

0.26

  a EC

0.6

0.0

0.7

0.02

 GC-BM

1.5

4.3

0.0

0.12

 EGC-BM

8.9

10.5

5.5

0.57

 C-BM

12.7

9.0

11.4

0.55

 EC-BM

67.4

38.2

74.0

0.74

  1. CT condensed tannins, PC procyanidins, PD prodelphinidins, GC gallocatechin, EGC epigallocatechin, C catechin, EC epicatechin, mDP mean degree of polymerization; flavan-3-ols composition is expressed in terms of relative molar percentages; a: flavan-3-ols in terminal position of the tannins; BM benzylmercaptan adduct, for flavan-3-ols in extender position
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Journal of Animal Science and Biotechnology

ISSN: 2049-1891