<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31304500</termId><termName>flash photolysis</termName><termType>PT</termType><termNote><![CDATA[ Experimental technique used to analyze short-lived chemical intermediates created when molecules are split by an intense flash of light. Analysis by spectrophotometry follows during a second, less intense, flash. This technique is useful in the study of the mechanisms of fast chemical reactions. ]]></termNote><termCreatedDate>2026-03-30 20:21:54</termCreatedDate><relation><relationType>UF</relationType><termId>31304501</termId><termName>photolysis, flash</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31298665</termId><termName>analysis and testing techniques</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31317362</termId><termName>spectrophotometry</termName><termType>PT</termType></relation></term>  </Zthes>