<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31303872</termId><termName>carbon monoxide</termName><termType>PT</termType><termNote><![CDATA[ An odorless, colorless, tasteless, and highly poisonous gas produced by the incomplete combustion of carbon-containing materials. It is used in organic synthesis and metallurgy. ]]></termNote><termCreatedDate>2026-03-30 20:21:43</termCreatedDate><relation><relationType>BT</relationType><termId>31298623</termId><termName>organic material</termName><termType>PT</termType></relation></term>  </Zthes>