<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31373697</termId><termName>sulfur dioxide</termName><termType>PT</termType><termNote><![CDATA[ A colorless gas used chiefly as a refrigerant, as a preservative, in bleach, and for making other chemicals; it is also a component of acid rain. ]]></termNote><termCreatedDate>2026-03-30 20:40:46</termCreatedDate><relation><relationType>UF</relationType><termId>31373698</termId><termName>dioxide, sulfur</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31373699</termId><termName>sulphur dioxide</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31343453</termId><termName>sulfur compounds</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31319934</termId><termName>sodium bisulfite</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31373716</termId><termName>sulfurous acid</termName><termType>PT</termType></relation></term>  </Zthes>