<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31343531</termId><termName>mercury</termName><termType>PT</termType><termNote><![CDATA[ Pure metallic element having symbol Hg and atomic number 80; a lustrous silvery metal that is liquid at ordinary temperatures. Use also for this metal as processed and formed, usually in combination with other substances, to make various objects and materials. ]]></termNote><termCreatedDate>2026-03-30 20:32:39</termCreatedDate><relation><relationType>UF</relationType><termId>31343532</termId><termName>Hg</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31343533</termId><termName>quicksilver</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31412118</termId><termName>mercury and amalgam</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31319740</termId><termName>elements</termName><termType>PT</termType></relation></term>  </Zthes>