<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">chitosan</topic></authority><related type="narrower"><topic>carboxymethyl chitosan</topic></related><related type="broader"><topic>chitin</topic></related> <note xml:lang="en"><![CDATA[ Chitosan is the deacetylated form of chitin, the chief component in the exoskeletons of crustaceans, insects, and beetles. It is used in horticulture and agriculture as a biopesticide, and plant growth enhancer; and in medicine as a coagulant. As a sprayed coating, cyanoethylated chitosan is used to protect historic paper material. Chitosan is also found as an organic component incorporated into polymer materials to form a self-healing coating which promises to render the painted surfaces it is applied to scratch-free. ]]></note></mads>