In brief, cholesterol is oxidized by cholesterol oxidase to form cholesterol-4-en-3-one and hydrogen peroxide, which then, with the presence of peroxidase, reacts with 4-aminoantipyrine
and N,N-di-substituted aniline to form a blue dye.
Effect of 4-aminoantipyrine
on gastric compliance and liquid emptying in rats.
In the presence of POD, hydrogen peroxide that was produced in the previous step is coupled oxidatively to phenol and 4-aminoantipyrine
to yield a dye called quinonimine that is red in color.
and ammonium citrate was taken as another carbon precursor to develop C-dots in air at 300 [degrees]C for 2 h.
Cresol was treated with 4-aminoantipyrine
at alkaline pH around 10.00 in presence of an oxidizing agent, potassium ferricyanide that results in the formation of stable reddish-brown colored antipyrine dye.
Liu et al., "Synthesis, characterization, antioxidant activity and DNA-binding studies of three rare Earth (III) complexes with 1-(4-aminoantipyrine
)-3-tosylurea ligand," Journal of Fluorescence, vol.
Indicator was quinoneimine, formed from hydrogen peroxide 4-aminoantipyrine
and 4-chlorophenol under the catalytic influence of peroxidase.
as an inhibitor of mild steel corrosion in HCl solution," Journal of Applied Electrochemistry, vol.
[H.sub.2][O.sub.2] reacts with 3-5-dichloro-2- hydroxybencesulfonic and 4-aminoantipyrine
by the peroxidase (Valtek Diagnostics, Santiago, Chile).
These nanoparticles were stable in water for more than four months and showed catalytic properties for the formation of antipyrilquinoneimine dye from 4-aminoantipyrine
and aniline in an acidic aqueous medium.
In the presence of peroxidase, the hydrogen peroxide reacts with phenol and 4-aminoantipyrine
(4AA) to form a coloured compound, quinoneimine.