<?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">biopatina</topic></authority><related type="broader"><topic>patina</topic></related> <note xml:lang="en"><![CDATA[ A biological treatment for copper alloys involving the conversion of existing corrosion patinas into more stable copper oxalates using the unique properties of carefully selected fungal strains. The cooper oxalate forms a protective layer that passivates the surface to prevent any exchange of copper ions and water. ]]></note></mads>