<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31304535</termId><termName>optical oxygen sensing</termName><termType>PT</termType><termNote><![CDATA[ Nondestructive analytic technique used to monitor oxygen consumption. It is based on the dynamic quenching of the fluorescence or phosphoresence of luminescent dyes by molecular oxygen. ]]></termNote><termCreatedDate>2026-03-30 20:21:54</termCreatedDate><relation><relationType>UF</relationType><termId>31304536</termId><termName>sensing, optical oxygen</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31298665</termId><termName>analysis and testing techniques</termName><termType>PT</termType></relation></term>  </Zthes>