About: http://webisa.webdatacommons.org/341541640

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 one embodiment, the specific gravity of the mantle layer is increased to about 1.25 by adding about 20% of a filler such as barium sulfate, zinc oxide, titanium dioxide and combinations thereof.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr