About: http://webisa.webdatacommons.org/299450896

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	Membranes, which may be made of different materials such as ceramic, glass, polymer, or metal, for example, have been in use for a long time for hydrogen separation.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com