<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>7244</termId><termName>DIFRACCION</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>DIFRACCION</termSortkey><termCreatedDate>DIFRACCION</termCreatedDate><termModifiedDate>2015-02-20 11:05:45</termModifiedDate><relation><relationType>BT</relationType><termId>1015</termId><termName>OPTICA</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>1014</termId><termName>LUZ</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>16847</termId><termName>DIFRACCION DE ELECTRONES</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>9187</termId><termName>DIFRACCION DE RAYOS X</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>33022</termId><termName>DIFRACCION GEOMETRICA</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>20118</termId><termName>HOLOGRAFIA</termName><termType>PT</termType></relation></term>  </Zthes>