About: http://webisa.webdatacommons.org/91356216

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 some embodiments, the bottom end is a disc that is not made from a porous material (e.g., FIG. 3A).
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com