**Chapter 2**

*Chitin and Chitosan - Physicochemical Properties and Industrial Applications*

of poly(vinyl alcohol) and chitosan, React. Funct. Polym. 55 (2003) 53-59. https://doi.org/10.1016/ S1381-5148(02)00214-6.

[70] Y. Liang, X. Zhao, P.X. Ma, B. Guo, Y. Du, X. Han, pH-responsive injectable hydrogels with mucosal adhesiveness based on chitosan-grafteddihydrocaffeic acid and oxidized pullulan for localized drug delivery, J. Colloid Interface Sci. 536 (2019) 224-234. https://doi.org/10.1016/j.

jcis.2018.10.056.

**26**
