<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31456295</termId><termName>diatomaceous earth</termName><termType>PT</termType><termNote><![CDATA[ An soft, whitish, absorbent powder derived from the siliceous skeletons of microscopic water plants called diatoms, composed of 88% silica. It is used as a poultice, a desiccating insecticide, a decolorizer and filtration aid for purifying oils, fats, and waxes, an inert pigment, a filler in paper, paint, brick, floor tiles, ceramics, linoleum, plastic, soap, and detergent, an insulation for boilers and blast furnaces, as sound insulation, and as a very mild abrasive in metal polishes and toothpaste. It reduces gloss, acts as a suspending agent, increases viscosity, and absorbs dyes well, thus is used as a base for lake colors. ]]></termNote><termCreatedDate>2026-03-30 21:02:49</termCreatedDate><relation><relationType>UF</relationType><termId>31456296</termId><termName>celite</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31456297</termId><termName>diatomite</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31456298</termId><termName>diatomite earth</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31456299</termId><termName>earth, diatomaceous</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31456300</termId><termName>infusorial earth</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31437784</termId><termName>calcium carbonate white pigment</termName><termType>PT</termType></relation></term>  </Zthes>