About: http://webisa.webdatacommons.org/69422355

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	preferably has a particle size of 400 nm or smaller, particularly 300 nm or smaller, especially 50 to 200 nm.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com