Figure 2.
The 1H NMR spectra of CS and its derivatives. Spectra were obtained with 32 scans, and delay of 2 s between pulses. A: CS in D2O and CF3COOD at 293 K, B: CS-CHO in D2O at 293 K; C: CS-g-(PEI-b-mPEG) in D2O at 293 K.
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