About: http://webisa.webdatacommons.org/384949471

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	The powders are preferably mixed in a vacuum of not higher than 1???10???3 Torr or in an inert gas atmosphere such as an argon gas to prevent contamination by oxygen.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com