With the progress of production, permeability reduction is gradually improved, and the permeability can be recovered to the original level or even higher when production process reaches the gas production decline stage.
With the progress of production, the permeability reduction phenomenon disappears gradually, and permeability can be recovered to the original level or even larger when production process reaches the gas production decline stage.
The progress of the reduction of 4-NP was monitored spectrophotometrically as a decrease in the absorbance of the substrate 4-NP at 400 nm.
The peaks at 225 and 358 nm indicate the progress of the reduction of 3-na.
Upon addition of NaBH4, the absorption band intensity decreased gradually, indicating the progress of the reduction of dye.
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Co II Cbl and Co II Cbi+ were prepared by adding a small volume of saturated HCOOK to degassed solutions of H2OCbl+ and (H2O 2Cbi2+, respectively, and the progress of the reduction was monitored spectrophotometrically.
We observed that during the progress of molybdate reduction, there was an increase in an overall absorption profile especially at the peak maximum at 865 nm and the shoulder at 700 nm in direct correlation with the increasing blue intensity of the media.
