About: http://webisa.webdatacommons.org/225413254

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 particles, called microprojectiles, are generally of a high density material such as tungsten or gold.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com