About: http://webisa.webdatacommons.org/456393015

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In a preferred embodiment, the test gas is helium and a conventional helium detector, such as the Balzer HCT 160 helium detector available from Varian Company of Palo Alto, Calif., is employed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com