About: http://webisa.webdatacommons.org/45408511

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	Of course, it has been known (e.g. Dreyer U.S. Pat. Nos. 3,853,987 and 4,108,972) to bind polymeric microspheres with such agents as antigens and antibodies to serve as reagents in immunoassay determinations.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com