<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31343819</termId><termName>algicide</termName><termType>PT</termType><termNote><![CDATA[ Any chemical such as copper sulfate used as a preparation to destroy algae. ]]></termNote><termCreatedDate>2026-03-30 20:32:43</termCreatedDate><relation><relationType>UF</relationType><termId>31343820</termId><termName>algicides</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31319909</termId><termName>biocide</termName><termType>PT</termType></relation></term>  </Zthes>