<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31301381</termId><termName>thermal stability</termName><termType>PT</termType><termNote><![CDATA[ Resistance to permanent changes in property caused solely by heat. ]]></termNote><termCreatedDate>2026-03-30 20:20:58</termCreatedDate><relation><relationType>UF</relationType><termId>31301382</termId><termName>stability, thermal</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31301383</termId><termName>thermostability</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31301384</termId><termName>thermostable</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31361752</termId><termName>heat-related concepts</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31298137</termId><termName>stability</termName><termType>PT</termType></relation></term>  </Zthes>