<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31333956</termId><termName>pH</termName><termType>PT</termType><termNote><![CDATA[ Quantitative measure or expression thereof of the acidity or alkalinity/basicity of an aqueous solution, a medium containing a solution, an aqueous dispersion or emulsion, and even air or gas. ]]></termNote><termCreatedDate>2026-03-30 20:29:59</termCreatedDate><relation><relationType>BT</relationType><termId>31311955</termId><termName>size/dimensions by unit</termName><termType>PT</termType></relation></term>  </Zthes>