Also, chemical spacers able to graft TiO2 on suitable functional groups of the textile and through a second link bond to the TiO2 clusters have been studied with promising results in photoactivated light induced discoloration processes.
Degaussing a monitor repeatedly can cause damage to the monitor that is far more severe that the discolorations the process is meant to solve.
In general, azo dyes are highly preferred because they attach to the fibers by forming strong covalent bonds with the hydroxyl groups of the cellulose [12], so that the process of discoloration is very difficult under the conditions where textiles are washed [13, 14].
If you don't immediately use the jicama, you can keep it fresh longer and avoid discoloration by submerging the processed jicama in a bowl of cold water with a squeeze of lemon juice.
Scientists didn't know what exact process caused the discoloration: Perhaps it was fog droplets oxidizing the surface or maybe sulfurous gas in the air.
Oxygen plays an antagonistic role: it allows reoxidation of the reduced Prussian blue and thus prevent strong Prussian blue discoloration in a dynamic redox process; but it also induces the degradation of the cotton substrate, which irreversibly ages as evidenced by the study of undyed cotton and by the samples after 3 years of storage in the dark.
The anti-oxidant ability of the foliar broth was measured using the DPPH (2, 2-diphenyl-1-picryl-hydrazylhydrate) radical photometric assay in a process regulated by its discoloration [16].
At this time, abrasion is the main degradation process without any marginal discoloration.
In the case of the peels and leaves tested in this study, it is not possible that discoloration occurred due to an adsorption process, because we used aqueous extracts as enzyme sources, which means that discoloration was achieved via degradation of the dye.
Fibers have several properties that are disadvantageous depending on the type of fiber and the processing conditions, such as discoloration, structure breaking, changing mouth feel, solidification (i.e., the process of becoming solid), or gelation.
