| COS | chitosan oligosaccharides |
| MW | molecular weight |
| COSA | average molecular weight ≤1000 Da of chitosan oligosaccharides |
| COSB | average molecular weight ≤3000 Da of chitosan oligosaccharides |
| DD | degree of deacetylation |
| GlcN | 2-amino-2-d-glucose (d-glucosamine) |
| GlcNAc | 2-acetamido-2-d-glucose |
| 1H NMR | nuclear magnetic resonance hydrogen spectrum |
| UV | ultraviolet |
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