dizing

oxidizing substances contained in animal and plant ti ues; they are believed to have a catalytic action and therefore to belong among the ferments; they cause the oxidation of various organic substances, converting hypo xanthin into xanthin, for example, direct' o., one which has the property of causing the transfer of oxygen from the air directly to other bodies, indirect' 0., one which acts only in the presence of a peroxide, peroxidase. 0. reac'tion, the formation of indol blue when a blood smear containing myeloid leucocytes is treated with a mixture of alpha naphthol and paradimeth3'l-aniline-sulphate the meyloid leucocytes contain a ferment of the oxidase variety which causes this reaction, the Ijonphoid leucocytes do not. pri'mary 0., direct o.