<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31320041</termId><termName>barium hydroxide</termName><termType>PT</termType><termNote><![CDATA[ Barium compound and fixative which, when used with ammonium carbonate solution, can repair the deterioration caused by calcium sulphate crystallization on fresco surfaces. ]]></termNote><termCreatedDate>2026-03-30 20:26:15</termCreatedDate><relation><relationType>BT</relationType><termId>31343462</termId><termName>barium compounds</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31305895</termId><termName>fixative</termName><termType>PT</termType></relation></term>  </Zthes>