File Name : supplementary fig.1.tif

Caption : supplementary fig.1 chemical structural formula and nmr 1h spectrum of chitosan oligosaccharide monomers (coss). (a) chemical structural formula of coss; (b) 1h spectrum of chitobiose: cos21h nmr (600 mhz, d2o, tsp) δ 5.43 (1h, d, j = 3.6 hz, 1α-h), 4.96 (0.5h, d, j = 8.5 hz, 1β-h); (c) 1h spectrum of chitotriose: cos31h nmr (600 mhz, d2o, tsp) δ 5.47 (1h, d, j = 3.5 hz, 1α-h), 4.99 (2h, dd, j = 8.5 hz, 1β-h); (d) 1h spectrum of chitotetraose: cos41h nmr (600 mhz, d2o, tsp) δ 5.44 (1h, d, j = 3.6 hz, 1α-h), 4.96 (0.1h, d, j = 8.5 hz, 1β-h); (e) 1h spectrum of chitopentaose: cos51h nmr (600 mhz, d2o, tsp) δ 5.44 (1h, d, j = 3.6 hz, 1α-h), 4.95 (1.2h, d, j = 8.5 hz, 1β-h).