<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31303904</termId><termName>lignin</termName><termType>PT</termType><termNote><![CDATA[ Impure colorless to brown crystalline matter found in wood; from the secondary wall structural support in wood cells. ]]></termNote><termCreatedDate>2026-03-30 20:21:43</termCreatedDate><relation><relationType>BT</relationType><termId>31298623</termId><termName>organic material</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31316734</termId><termName>lignocellulose</termName><termType>PT</termType></relation></term>  </Zthes>