<?xml version="1.0" encoding="utf-8"?><rdf:RDF  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"  xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"  xmlns:skos="http://www.w3.org/2004/02/skos/core#"  xmlns:map="http://www.w3c.rl.ac.uk/2003/11/21-skos-mapping#"  xmlns:dct="http://purl.org/dc/terms/"  xmlns:dc="http://purl.org/dc/elements/1.1/"><skos:ConceptScheme rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_en">  <dc:title>Tesaurus d&apos;Art i Arquitectura</dc:title>  <dc:creator>Getty Institute</dc:creator>  <dc:contributor></dc:contributor>  <dc:publisher></dc:publisher>  <dc:rights></dc:rights>  <dc:subject></dc:subject>  <dc:description><![CDATA[  ]]></dc:description>  <dc:date>0000-00-00</dc:date>  <dct:modified>2024-01-24 15:40:44</dct:modified>  <dc:language>en</dc:language>  </skos:ConceptScheme>  <skos:Concept rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31343359"><skos:prefLabel xml:lang="en">quaternary ammonium compounds</skos:prefLabel><skos:notation>300386704</skos:notation><skos:altLabel xml:lang="en">compounds, quaternary ammonium</skos:altLabel><skos:altLabel xml:lang="en">QACs</skos:altLabel><skos:altLabel xml:lang="en">quaternary ammonium compound</skos:altLabel><skos:altLabel xml:lang="en">quaternary ammonium salts</skos:altLabel> <skos:scopeNote xml:lang="en">Quaternary ammonium compounds are salts of quaternary ammonium cations with an anion. They are prepared by alkylation of tertiary amines. The compounds are used in softener formulations in the textile industry and in hair conditioner formulas. In conservation, they are used as wood preservatives, and as surfactant fungicides in treatment of textiles and paper. </skos:scopeNote><skos:inScheme rdf:resource="http://AATesaurus.cultura.gencat.cat/aat/getty_en"/><skos:broader rdf:resource="http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31319736"/><skos:exactMatch> <skos:Concept rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_es/index.php?tema=14071776"> <skos:prefLabel xml:lang="es">quaternary ammonium compounds (traducció pendent)</skos:prefLabel> </skos:Concept></skos:exactMatch><skos:exactMatch> <skos:Concept rdf:about="http://AATesaurus.cultura.gencat.cat/aat/getty_ca/index.php?tema=9837916"> <skos:prefLabel xml:lang="ca">quaternary ammonium compounds (traducció pendent)</skos:prefLabel> </skos:Concept></skos:exactMatch>  <dct:created>2026-03-30 20:32:36</dct:created>  </skos:Concept></rdf:RDF>