<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">chitosan</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31316737</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:25:17</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dc:description 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. ]]></dc:description></metadata>