prior to and subsequent photocatalytic treatment after removing the nano-TiO2 by centrifugation.
Then 100 lL of this incubate was added in the 900 lL of reaction mixture
containing GSH (5 mM) and CDNB (1 mM) and GST activity
was monitored spectrophotometrically at 340 nm. Enzyme activities
were calculated after correction for the nonenzymatic reaction.