<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344303</termId><termName>aqua regia</termName><termType>PT</termType><termNote><![CDATA[ Acid used for dissolving or testing gold and platinum; consisting of three parts hydrochloric acid and one part nitric acid. ]]></termNote><termCreatedDate>2026-03-30 20:32:51</termCreatedDate><relation><relationType>BT</relationType><termId>31320287</termId><termName>hydrochloric acid</termName><termType>PT</termType></relation></term>  </Zthes>