Preparation of Polyanionic Cellulosic Microparticles with Antioxidant Capacity by Introducing Sulphurous Acid Groups onto Cellulose

Figure 4

Optical microscopy images of the cellulose gel particles (a) prepared from cellulose solution with concentration of 2.0 wt%; (b)-(f) were for SRC-10, SRC-20, SRC-30, SRC-40, SRC-50, respectively.

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(b)

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(f)