Table 1.
Characteristics of oligomannuronate (OM), oligoguluronate (OG) [16,17], oligoalginate (OAlg), and semi-refined alginates (s-r Alg) [18].
| Description | Method | Result | Units | |
|---|---|---|---|---|
| Oligomannuronate (OM) | Solids | Constant weight at 103 °C | 95.6 | %dry/crude |
| Mineral matter | 12 h, 550 °C | 31.9 | %dry/crude | |
| Ratio (M/G) | By calculation, 1H NMR | 2.7 | ||
| DP | By calculation | 4.0 | ||
| Oligoguluronate (OG) | Solids | Constant weight at 103 °C | 100.0 | %dry/crude |
| Mineral matter | 12 h, 550 °C | 26.3 | %dry/crude | |
| Ratio (M/G) | By calculation, 1H NMR | 0.04 | ||
| DP | By calculation | 30.0 | ||
| Oligoalginate (OAlg) | Solids | Constant weight at 103 °C | 90.1 | %dry/crude |
| Mineral matter | 12 h, 550 °C | 44.3 | %dry/crude | |
| Ratio (M/G) | By calculation, 1H NMR | 1.4 | ||
| DP | By calculation | 12.7 | ||
| Semi-refined alginates (s-r Alg) | Solids | Constant weight at 103 °C | 94.9 | %dry/crude |
| Mineral matter | 12 h, 550 °C | 47.0 | %dry/crude | |
| Mannuronic and guluronic content | Methanolysis | 29.2 | %dry/crude | |
| Glucose content | Methanolysis | 10.9 | %dry/crude | |
| Xylose content | Methanolysis | <0.5 | %dry/crude | |
| Fucose content | Methanolysis | 2.1 | %dry/crude | |
| Ratio (M/G) | By calculation, 1H NMR | 2.6 |