<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31410757</termId><termName>tetraethylene glycol</termName><termType>PT</termType><termNote><![CDATA[ A polyethylene glycol in the form of an odourless and non volatile hygroscopic liquid characterised by two hydroxyl groups and three ether linkages. It is a mixture comprising some high and low molecular weight glycols, but consisting mainly of tetraglycol. It has been used in conservation to stabilize waterlogged archaeological wooden objects. ]]></termNote><termCreatedDate>2026-03-30 20:50:27</termCreatedDate><relation><relationType>UF</relationType><termId>31410758</termId><termName>TEG</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31410759</termId><termName>glycol, tetraethylene</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31373500</termId><termName>polyethylene glycol</termName><termType>PT</termType></relation></term>  </Zthes>