Table 2 CSA parameters of larval and adult cuticles at different carbon nuclei sites.

From: Exploring the structure and dynamics of soft and hard cuticle of Bombyx mori using solid-state NMR techniques

Carbon nuclei site as it is assigned in Figure-5

\({\delta }_{iso}\) (ppm)

\({\delta }_{11}\) (ppm)

\({\delta }_{22}\) (ppm)

\({\delta }_{33}\) (ppm)

Span (ppm)

Anisotropy (ppm)

Asymmetry

Skew

Principal components of CSA parameters of larval cuticle

 1

173.3

252.9 ± 0.8

162.9 ± 0.6

104.0 ± 0.5

148.9 ± 0.80

119.5 ± 1.2

0.7

\(- 0.2\)

 2

154.5

214.4 ± 1.3

166.5 ± 0.9

82.5 ± 0.8

131.9 ± 1.4

− 107.9 ± 1.3

0.7

0.3

 First line corresponds to chemical ‘4’

137.7

152.8 ± 0.4

136.4 ± 0.3

123.9 ± 0.3

28.9 ± 0.6

22.2 ± 0.7

0.8

\(- 0.1\)

 Second line corresponds to chemical ‘4’

129.3

152.0 ± 0.7

127.9 ± 0.6

108.0 ± 0.5

43.9 ± 0.8

34.0 ± 1.1

0.9

\(- 0.1\)

 5

116.5

137.3 ± 0.6

115.7 ± 0.5

96.5 ± 0.4

40.7 ± 0.6

31.1 ± 0.9

0.9

\(- 0.05\)

 First line corresponds to chemical ‘6’

104.2

123.3 ± 0.5

103.2 ± 0.4

86.1 ± 0.4

37.2 ± 0.6

28.6 ± 0.8

0.9

\(- 0.07\)

 Second line corresponds to chemical ‘6’

99.2

121.0 ± 0.7

99.0 ± 0.5

77.5 ± 0.4

43.6 ± 0.7

32.8 ± 1.0

1.0

0.0

 Third line corresponds to chemical ‘6’

93.5

105.0 ± 0.2

94.1 ± 0.1

81.3 ± 0.1

23.7 ± 0.3

− 18.2 ± 0.2

0.9

0.08

 7

83.6

104.2 ± 0.6

81.8 ± 0.5

64.8 ± 0.4

39.4 ± 0.7

30.9 ± 0.9

0.8

\(- 0.1\)

 8

75.5

109.7 ± 0.7

63.4 ± 0.6

53.4 ± 0.4

56.3 ± 0.6

51.3 ± 1.1

0.3

\(- 0.6\)

 9

73.5

93.3 ± 0.4

72.5 ± 0.3

54.6 ± 0.2

38.6 ± 0.4

29.7 ± 0.5

0.9

\(- 0.07\)

 10

60.8

79.8 ± 0.6

57.2 ± 0.4

45.7 ± 0.4

34.5 ± 0.7

28.5 ± 0.9

0.6

\(- 0.3\)

 First line corresponds to chemical ‘11’

55.0

69.9 ± 0.3

54.0 ± 0.2

41.0 ± 0.2

28.9 ± 0.4

22.4 ± 0.5

0.9

\(- 0.1\)

 Second line corresponds to chemical ‘11’

49.0

65.2 ± 0.3

48.2 ± 0.2

33.6 ± 0.2

31.5 ± 0.4

24.2 ± 0.5

0.9

\(- 0.08\)

 12

40.0

59.7 ± 0.7

35.5 ± 0.5

24.7 ± 0.5

35.0 ± 0.8

29.6 ± 1.0

0.5

\(- 0.4\)

 13

33.3

44.0 ± 0.1

30.1 ± 0.07

25.7 ± 0.10

18.4 ± 0.1

16.1 ± 0.2

0.4

\(- 0.5\)

 14

30.2

43.5 ± 0.2

28.5 ± 0.1

18.5 ± 0.1

25.0 ± 0.3

20.0 ± 0.3

0.7

\(- 0.2\)

 First line corresponds to chemical ‘15’

26.0

34.7 ± 0.05

24.6 ± 0.03

18.7 ± 0.03

16.0 ± 0.05

13.0 ± 0.11

0.7

\(- 0.3\)

 Second line corresponds to chemical ‘15’

23.5

32.5 ± 0.2

24.0 ± 0.1

13.9 ± 0.2

18.5 ± 0.3

− 14.3 ± 0.3

0.9

\(0.09\)

 First line corresponds to chemical ‘16’

19.5

30.7 ± 0.2

18.3 ± 0.1

9.5 ± 0.2

21.2 ± 0.3

16.8 ± 0.3

0.8

\(- 0.2\)

 Second line corresponds to chemical ‘16’

16.0

29.8 ± 0.2

12.0 ± 0.1

6.0 ± 0.1

23.7 ± 0.3

20.7 ± 0.3

0.4

\(- 0.5\)

 Third line corresponds to chemical ‘16’

13.0

26.4 ± 0.2

9.6 ± 0.1

3.0 ± 0.1

23.3 ± 0.3

20.0 ± 0.3

0.5

\(-0.4\)

Principal components of CSA parameters of adult cuticle

 1

173.3

254.4 ± 0.9

160.0 ± 0.7

105.5 ± 0.6

148.9 ± 0.9

121.7 ± 1.4

0.6

\(- 0.2\)

 2

157.0

230.5 ± 2.6

154.9 ± 1.9

85.5 ± 1.6

145.0 ± 2.6

110.3 ± 3.8

0.9

\(- 0.04\)

 3

144.0

179.3 ± 1.6

142.7 ± 1.3

109.9 ± 1.1

69.4 ± 1.7

53.0 ± 2.5

0.9

\(- 0.05\)

 First line corresponds to chemical ‘4’

136.5

153.8 ± 0.6

136.9 ± 0.3

118.9 ± 0.5

34.9 ± 0.9

− 26.4 ± 0.7

0.9

0.03

 Second line corresponds to chemical ‘4’

129.3

146.4 ± 0.5

127.0 ± 0.3

114.4 ± 0.4

32.0 ± 0.7

25.7 ± 0.7

0.7

\(- 0.2\)

 5

117.0

138.9 ± 0.4

112.5 ± 0.2

99.6 ± 0.3

39.2 ± 0.5

32.8 ± 0.5

0.5

\(- 0.3\)

 First line corresponds to chemical ‘6’

104.0

121.2 ± 0.1

103.3 ± 0.07

87.5 ± 0.07

33.7 ± 0.1

25.8 ± 0.1

0.9

\(- 0.06\)

 Second line corresponds to chemical ‘6’

94.2

113.9 ± 0.4

95.3 ± 0.2

73.3 ± 0.3

40.6 ± 0.5

− 31.2 ± 0.4

0.8

0.08

 7

83.6

116.3 ± 0.2

67.3 ± 0.2

67.3 ± 0.1

49.0 ± 0.2

49.0 ± 0.3

0.0

\(- 1.0\)

 8

75.6

93.2 ± 0.1

66.8 ± 0.09

66.7 ± 0.09

26.5 ± 0.1

26.4 ± 0.2

0.0

\(- 1.0\)

 9

73.5

95.9 ± 0.3

66.5 ± 0.2

58.0 ± 0.2

37.9 ± 0.4

33.6 ± 0.4

0.3

\(- 0.5\)

 10

60.8

82.5 ± 0.2

56.1 ± 0.1

43.7 ± 0.1

38.8 ± 0.3

32.6 ± 0.3

0.5

\(- 0.3\)

 First line corresponds to chemical ‘11’

55.0

74.2 ± 0.1

53.4 ± 0.08

37.3 ± 0.08

36.9 ± 0.1

25.8 ± 0.2

0.8

\(- 0.1\)

 Second line corresponds to chemical ‘11’

49.0

70.4 ± 0.2

49.1 ± 0.1

27.5 ± 0.1

42.8 ± 0.3

− 32.2 ± 0.2

0.9

0.01

 12

40.0

63.6 ± 0.6

40.5 ± 0.4

15.8 ± 0.4

47.7 ± 0.8

− 36.2 ± 0.7

0.9

0.03

 13

33.3

54.4 ± 0.2

28.8 ± 0.1

16.7 ± 0.1

37.7 ± 0.2

31.6 ± 0.2

0.5

\(- 0.3\)

 14

30.2

40.8 ± 0.05

28.8 ± 0.04

20.9 ± 0.03

19.9 ± 0.05

15.9 ± 0.07

0.7

\(- 0.2\)

 First line corresponds to chemical ‘15’

25.0

35.9 ± 0.07

26.4 ± 0.05

12.6 ± 0.05

23.3 ± 0.09

− 18.5 ± 0.08

0.7

0.1

 Second line corresponds to chemical ‘15’

23.0

33.3 ± 0.02

24.4 ± 0.02

11.3 ± 0.01

22.0 ± 0.01

− 17.5 ± 0.02

0.7

0.1

 First line corresponds to chemical ‘16’

19.5

36.6 ± 0.10

15.8 ± 0.07

6.1 ± 0.07

30.5 ± 0.13

25.6 ± 0.1

0.5

\(- 0.3\)

 Second line corresponds to chemical ‘16’

16.0

32.1 ± 0.13

7.9 ± 0.08

7.9 ± 0.10

24.2 ± 0.18

24.2 ± 0.2

0.0

\(- 1.0\)

 Third line corresponds to chemical ‘16’

12.4

19.7 ± 0.05

11.7 ± 0.03

5.8 ± 0.04

13.9 ± 0.08

10.9 ± 0.08

0.8

\(- 0.1\)

  1. The information regarding the anisotropy and the asymmetry of the shielding tensor are \(\Delta \delta = {\delta }_{33}- 1/2\left({\delta }_{11}+ {\delta }_{22}\right)\) and \(\eta = \left({\delta }_{22}- {\delta }_{11}\right)/\left({\delta }_{33}- {\delta }_{iso}\right)\) respectively. The magnitude of the anisotropy defines the distance of the largest separation of the spinning CSA sideband pattern from the position of the center of gravity \(\left({\delta }_{iso}= {\delta }_{11}+ {\delta }_{22}+ {\delta }_{33}/3\right)\)- of the sideband pattern, and the sign of the anisotropy represents on which side of the center of gravity the distance of separation is maximum. The ‘asymmetry’ parameter says the deviation of the spinning CSA sideband pattern from its axially symmetric shape. The ‘span’ \(\left(\Omega = {\delta }_{33}-{\delta }_{11}\right)\) monitors the breadth of the spinning CSA sideband pattern, and ‘skew’\(\left(k= \left({\delta }_{iso}- {\delta }_{22}\right)/\left({\delta }_{33}-{\delta }_{11}\right)\right)\) measures the amount of orientation of the asymmetry pattern. When \(k=\pm 1\), the spinning CSA pattern is axially symmetric, and the CS tensor is non-axial when \(k=+0.3\).