Dear Sir. Concerning your issue about the chemical properties of chitin an how does it help fungus to survive. Several lines of evidence define the function of chitin in keeping the wall shape and rigidity and consequently its crucial role in fungal morphogenesis. For instance, Aspergillus cell walls retain their original shape upon removal of amorphous cell components under conditions where only chitin remains unaffected. The organization of the chitin microfibrillar mesh has been studied after removal of the other 3wall components by enzymatic digestion or by chemical oxidation. aviour of fungi. The presence of the wall defines the shape and strength of the fungal cell and is a critical determinant for the morphological development of these eucaryots. Functions such as vegetative growth, reproduction, dispersal, survival and cell-cell interaction, depend to a great extent in the mode of cell wall construction. This means that, in symple terms, fungal differentiation and morphogenesis can be explained on the basis of cell wall morphogenesis. In general, the fungal cell wall consists of 80 to 90 % polysaccharides with protein and lipids accounting for the remaining portion. Physically, it can be considered as a mesh of microfibrillar polymers imbedded in a matrix of amorphous or cementing components. Except for the lower fungi and most true yeasts, which have cellulose and glucans in the cell wall, respectively, the most important structural components of the fungal cell wall is chi tin. Proteins and polysaccharides such as mannans, glucans, galactans and some heteropolysaccharides represent the cementing material which, by joining the skeletal components together, provide the macromolecular dimension of the cell wall.  I think the following below links may help you in your analysis:

https://link.springer.com/chapter/10.1007/978-1-4613-2167-5_8

http://pubs.acs.org/doi/abs/10.1021/jf048202s

http://www.jbc.org/content/286/16/13859.full

Thanks