Table 1.
Conformations and correlation parameters of modified β-glucan.
| Glucan | Modification Methods | Solution | Mw Range | Conformations and Correlation Parameters | Ref. |
|---|---|---|---|---|---|
| Pleurotus tuber-regium β-glucan | Microwave | 0.02% NaN3 | 8.20 × 105~4.88 × 106 | Sphere-like chain. [η] = 3.02 × 10−2 Mw0.44 ± 0.1 (cm3·g−1). <S2>z1/2 = 8.32 × 10−2 Mw0.38 ± 0.2(nm) | [14] |
| Yeast β-glucan | Sulfate | 0.2 M·NaCl | 2.22~8.78 × 104/5.06~8.78 × 104 | Semi-stiff chain. [η] = (5.03 ± 0.31) × 10−3 Mw0.84 ± 0.03 (cm3·g−1), Yamakawa-Fujii-Yoshizaki (YFY) worm-like cylinder model, ML = 646 nm−1, q = 5.1 nm, C∞ = 16.33. <S2>z1/2 = (2.33 ± 0.40) × 10−3 Mw0.62 ± 0.02 (nm), Kratky-Porod (KP) worm-like chain model, ML = 596 nm−1, q = 8.7 nm | [10] |
| Poria cocos β-glucan | Phosphory-lated | 0.15 M·NaCl | 2.6 × 104~26.9 × 104 | Relatively extended flexible. [η] = 6.61 × 10−3 Mw0.73 (cm3·g−1), worm-like cylinder model, ML = 818 nm−1, q = 3.0 nm, C∞ = 5.2 | [15] |
| Poria cocos mycelia α-glucan | Phosphory-lated | 0.15 M·NaCl | 1.96 × 104~15.6 × 104 | Semi-stiff chain. [η] = 2.87 × 10−3 Mw0.86 ± 0.02 (mL·g−1), ML = 780 ± 40 nm−1, q = 6.0 ± 1 nm, C∞ = 15.1 ± 1 | [16] |
| Oat β-glucan | Enzyment | 2.2 × 103~2.1 × 105 | Random coil. [η] = 1.06 × 10−2 Mw0.86 | [17] |
[η]: Intrinsic viscosity; Mw: Molecular weight; <S2>z1/2: Mean-square radius of gyration; ML: molar mass per unit contour length; q: Persistence length of molecular chains; C∞: Characteristic ratio of polymer molecules.