<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31301810</termId><termName>biopatina</termName><termType>PT</termType><termNote><![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. ]]></termNote><termCreatedDate>2026-03-30 20:21:07</termCreatedDate><relation><relationType>BT</relationType><termId>31298245</termId><termName>patina</termName><termType>PT</termType></relation></term>  </Zthes>