<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31320584</termId><termName>macromolecules</termName><termType>PT</termType><termNote><![CDATA[ Any very large molecules having a much larger number of atoms and a higher molecular weight than ordinary molecules. Plastics, rubbers, proteins, nucleic acids are examples of substances composed of macromolecules.  ]]></termNote><termCreatedDate>2026-03-30 20:26:24</termCreatedDate><relation><relationType>UF</relationType><termId>31320585</termId><termName>macromolecule</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31306164</termId><termName>molecules</termName><termType>PT</termType></relation></term>  </Zthes>