HRP generates O2 from any H2O2 produced by the lactobacilli which in turn oxidises the TMB substrate to form a blue pigment.
In pentose-growing yeasts, xylose is first reduced by xylose reductase (XR) to xylitol [ 20], which in turn is oxidised to xylulose by XDH [ 18, 19].
Ero1 oxidises the PDI that in turn delivers oxidising equivalents to newly synthesised protein substrates.
Apparently, those fucking huge gross blackheads are bits of skin folded in on themselves, the surfaces of which are "oxidised", so they turn black and look a bit like someone mixed a bird shit with a liquorice all sort and threw a bit of hashish in for good measure.
Among all oxidised phenolic compounds used, oxidised tannic acid exhibited the highest gel strengthening effect, compared with oxidised ferulic acid, oxidised catechin and oxidised caffeic acid (Balange and Benjakul 2009a).
Green earths are soluble in both acids and alkalis, and they turn brown upon heating, as divalent iron is oxidised to its trivalent counterpart [74].
This is unpleasant in itself, and also turns brown as it oxidises, making it harder for machines that handle and sort notes to recognise them.
However, we may not exclude that copper filings [30, 31] were added and during the firing process in oxidising atmosphere turned into tenorite.
It has been found that OH can be generated from H2O2 in plant cells by peroxidases (Almagro et al. 2009) The hydroxyl radical is likely to be instrumental in oxidising the dye molecules to form dye radicals, which in turn may polymerise as in the case of BB, or form the bleached dye species as in the case of MO.
Arabitol is then re-oxidised by arabitol dehydrogenase to give L-xylulose [ 17], which is in turn converted to xylitol by L-xylulose reductase [ 17].
