: ConcentrationUnitshttp://www.semanticweb.org/owl/owlapi/turtle# Create a prefix for http://www.semanticweb.org/owl/owlapi/turtle# Hit Enter to save Double click to create a prefix | rdfs:subClassOf | : Unitshttp://www.semanticweb.org/owl/owlapi/turtle# Create a prefix for http://www.semanticweb.org/owl/owlapi/turtle# Hit Enter to save Double click to create a prefix |