The rate of the thermal fading reaction was examined by monitoring the decrease in the absorbance at 556 nm after cessation of illumination (Fig. 1d).
The positive mutant was screened by measuring the decrease in the absorbance of NADPH at 340 nm and high performance liquid chromatography (HPLC).
Photoirradiation of the dendrimers with 313 nm gave rise to monotonous decrease in the absorbance of trans-cinnamates at 270 nm as a result of their photochemical reactions involving trans-to-cis photoisomerization and [2+2] photodimerization.
In our design, CoOOH nanoflakes can directly oxidize 3,3′,5,5′-tetramethylbenzidine 3,3′,5,5′-tetramethylbenzidine blue color emerging, and AA can selecTMBely inhibitothe oxTMBtion of TMB to oxTMB by resolving CoOOH nanoflakes to Co2+, resulting in a decrease in the absorbance of oxTMB and bleaching of blue color.
Compared with this, there is only a negligible decrease in the absorbance of SEC-LDH.
The antioxidants produce a discoloration with a decrease in the absorbance measured at 734 nm [34].
The decrease in the absorbance of H2O2 was recorded at 240 nm for 1 min.
The decrease in the absorbance at 400 nm with time was shown in Figure 6.
The decrease in the absorbance was probably attributed to the instability of the PG derivatives at higher temperatures.
However, also when TADH is incubated with 2-cyclohexenone, a fast decrease in the absorbance is detectable (entry 8).
The decrease in the absorbance of the resulting solution was then measured spectrophotometrically at ν 517 nm.
