About: http://webisa.webdatacommons.org/160150726

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	It has been repeatedly demonstrated that colloidal silica is precipitated by such ions as calcium, magnesium, and bicarbonate in aqueous solution (Cox, Dean, and Gottschalk, 1916, pp. 7-12; Tarr, 1917, p. 436; Lovering, 1923, p. 536).
http://www.w3.org/ns/prov#wasQuotedFrom	ku.edu