About: http://webisa.webdatacommons.org/336230160

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	Viruses purified by isopycnic centrifugation??? a density gradient was formed during high speed centrifugation of a solution of caesium chloride and the two virus types come to rest at points corresponding to their density.
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org