<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373616</termId><termName>copper oxide</termName><termType>PT</termType><termNote><![CDATA[ A semiconducting material that can be used as an additive for thermo conductive, superconductive, glass, ceramics and sensing materials. Copper oxides exist in two different forms: cupric oxide (CuO) and cuprous oxide (Cu2O), depending on the valence state of copper. ]]></termNote><termCreatedDate>2026-03-30 20:40:45</termCreatedDate><relation><relationType>UF</relationType><termId>31373617</termId><termName>oxide, copper</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343415</termId><termName>oxides</termName><termType>PT</termType></relation></term>  </Zthes>