<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31301258</termId><termName>concentration</termName><termType>PT</termType><termNote><![CDATA[ Quantity of a substance contained in a unit quantity sample. ]]></termNote><termCreatedDate>2026-03-30 20:20:56</termCreatedDate><relation><relationType>UF</relationType><termId>31301259</termId><termName>concentrations</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31298100</termId><termName>chemical properties</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31311649</termId><termName>pigment volume concentration</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31311652</termId><termName>iodine number</termName><termType>PT</termType></relation></term>  </Zthes>