About: http://webisa.webdatacommons.org/100871880

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	The basic requirement for measurement with an opticalindicator is a change in an optical property of the dye such as absorption or fluorescence that can be correlated with the pH of the medium.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com