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. 2019 Mar 23;13(1):33. doi: 10.1186/s13065-019-0555-1

Fig. 2.

Fig. 2

13C CP MAS NMR spectra of carboxymethylcellulose (low molecular weight, 3CMC) and carboxymethylcellulose functionalized with PEG and amino acids (lysine, histidine)