<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31316773</termId><termName>alkane</termName><termType>PT</termType><termNote><![CDATA[ A member of the series of saturated hydrocarbons with the general chemical formula CnH2n+2, where "n" is a whole number.  Though generally nonreactive, they combust readily and many important fuels are alkanes, such as methane and butane, or mixtures of alkanes such as gasoline. ]]></termNote><termCreatedDate>2026-03-30 20:25:18</termCreatedDate><relation><relationType>UF</relationType><termId>31316774</termId><termName>alkanes</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31303913</termId><termName>hydrocarbon</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31340205</termId><termName>methane</termName><termType>PT</termType></relation></term>  </Zthes>