About: http://webisa.webdatacommons.org/312981016

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	That is, they are treated with an agent such as hot ammonium hydroxide or a hot sulfuric acid and hydrogen peroxide solution or another strong oxidant, that hydrates the surfaces.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com