About: http://webisa.webdatacommons.org/454023916

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	In a first embodiment the magnetic particles are Fe3 O4 (magnetite) and result from a chemical reaction between a mixture of FeSO4 and FeCl3 and alkali such as NaOH, Fe(OH)2, or Fe(OH)3.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr