About: http://webisa.webdatacommons.org/428201148

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 the fine particles have a mean particle size of about 1 to 100 ??m, particularly of about 1 to 50 ??m.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com