<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>3237</termId><termName>Toxicología ambiental</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>MATERIAS BUA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>Toxicología ambiental</termSortkey><termNote label="History"><![CDATA[ Admitida septiembre 2000 ]]></termNote><termCreatedDate>Toxicología ambiental</termCreatedDate><relation><relationType>UF</relationType><termId>3238</termId><termName>Ecotoxicología</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>3239</termId><termName>Polución - Toxicología</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>26</termId><termName>1. ENCABEZAMIENTOS DE MATERIA</termName><termType>TT</termType></relation></term>  </Zthes>