<http://webisa.webdatacommons.org/118196447>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.co.uk> .
<http://webisa.webdatacommons.org/118196447>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/455762477>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/118196447> .
<http://webisa.webdatacommons.org/118196447>	<http://www.w3.org/ns/prov#value>	"The main filter membrane, in accordance with one aspect of the invention, may be treated with chemical or fluidic retention enhancement agents such as surfactants, acids, bases, chelating reagents, salts, organic solvents, etc., to enhance target species retention on the main filtration medium while allowing practical sample flow through the membrane." .