<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>7919</termId><termName>ENVEJECIMIENTO</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>ENVEJECIMIENTO</termSortkey><termCreatedDate>ENVEJECIMIENTO</termCreatedDate><termModifiedDate>2015-02-09 06:55:00</termModifiedDate><relation><relationType>UF</relationType><termId>18476</termId><termName>Senectud</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>18475</termId><termName>Ancianos--Aspectos psicológicos</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>1358</termId><termName>GERONTOLOGIA</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>1505</termId><termName>BIOLOGÍA EVOLUTIVA</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>7918</termId><termName>PERSONAS ADULTAS MAYORES</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>18473</termId><termName>EDAD MADURA</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>16635</termId><termName>LONGEVIDAD</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>9885</termId><termName>VEJEZ</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>18474</termId><termName>ENVEJECIMIENTO CELULAR</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>2214</termId><termName>ENVEJECIMIENTO DE LAS PLANTAS</termName><termType>PT</termType></relation></term>  </Zthes>