<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31306131</termId><termName>phase change material</termName><termType>PT</termType><termNote><![CDATA[ Substances which absorb or release large amounts of so-called ‘latent’ heat when they go through a change in their physical state, i.e. from solid to liquid and vice versa. ]]></termNote><termCreatedDate>2026-03-30 20:22:22</termCreatedDate><relation><relationType>UF</relationType><termId>31306132</termId><termName>PCM</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31298940</termId><termName>materials by property</termName><termType>PT</termType></relation></term>  </Zthes>