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Table 4 Assignments of 13C-1H cross-signals in HSQC spectra of hemicellulosic fractions isolated by sequential alkaline extractions from the delignified ryegrass

From: Enzymatic response of ryegrass cellulose and hemicellulose valorization introduced by sequential alkaline extractions

Glycosyl

Assignments (ppm)

 

1

2

3

4

5eqd

5axe

OCH3

Xa

13C

102.4

73.5

75.0

76.0

63.2

63.2

 

1H

4.35

3.17

3.32

3.60

3.93

3.21

 

Ub

13C

 

71.2

73.8

   

59.6

1H

 

3.40

3.61

   

3.31

Ac

13C

109.6

80.2

78.3

86.5

61.7

61.7

 

1H

5.25

3.91

3.63

4.05

3.73

3.55

 

Gal

13C

 

69.5

     

1H

 

3.85

     
  1. aX, (1 → 4)-β-d-Xylp
  2. bU, 4-O-methyl-α-d-GlcpA
  3. cA, α-ʟ-Araf residues
  4. deq, equatorial
  5. eax, axial
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Biotechnology for Biofuels and Bioproducts

ISSN: 2731-3654

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