<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31317663</termId><termName>vapor-phase deacidification</termName><termType>PT</termType><termNote><![CDATA[ A method of deacidifying paper that involves treating manuscript material to a gaseous alkali compound. It is now rarely used because of evidence that the vapor is toxic. ]]></termNote><termCreatedDate>2026-03-30 20:25:32</termCreatedDate><relation><relationType>UF</relationType><termId>31317664</termId><termName>VPD</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31317665</termId><termName>deacidification, vapor-phase</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31304666</termId><termName>deacidification</termName><termType>PT</termType></relation></term>  </Zthes>