potassium-permanganate and aniline

Possibilities of polarization-optic methods for studying macromolecular organization of the intercellular matrix of the connective tissue are demonstrated. Topo-optic reactions, being histochemical, make it possible to reveal not only presence of the molecules studied, but also quantitatively determine degree of their orientational regularity in the structural organization of the intercellular matrix. Determination of changes in the orientational regularity of single molecules contributes to revealing morphogenetic peculiarities of the intercellular matrix of the connective tissue, normal and under development of the destructive-distrophic process. Methodological principles of reactions to collagen, glycosaminoglycanes, glycoproteins, elastin and non-collagenous proteins are presented. Their advantages comparing certain known histochemical reactions, as well as their limitations are demonstrated. Certain illustrative material is presented.

Topics: Aniline Compounds; Animals; Chemical Phenomena; Chemistry; Child, Preschool; Collagen; Congo Red; Connective Tissue; Elastin; Extracellular Space; Glycoproteins; Glycosaminoglycans; Histocytochemistry; Humans; Hydrogen-Ion Concentration; Microscopy, Polarization; Phenol; Phenols; Potassium Permanganate; Proteins; Rats; Staining and Labeling; Sulfites; Tolonium Chloride

In this study, the potential applicability of potassium permanganate (Mn(VII)) for anilines elimination was systematically investigated firstly, with a focus on the effect of manganese intermediates on the kinetics of anilines versus phenols. It was found that Mn(VII) could fairly oxidize anilines, where the second-order rate constants (k

Topics: Aniline Compounds; Catalysis; Humic Substances; Manganese; Manganese Compounds; Oxidation-Reduction; Oxides; Phenols; Potassium Permanganate; Water Pollutants, Chemical; Water Purification

To investigate the effect of pH on the oxidation of anilines by potassium permanganate, aniline and p-Chloroaniline were taken as the target contaminants, and the experiments were conducted under the condition with potassium permanganate in excess over a wide pH range. The reaction displayed remarkable autocatalysis, which was presumably ascribed to the formation of complexes by the in situ generated MnOx and the target contaminants on its surface, and thereby improved the oxidation rate of the target contaminants by permanganate. The reaction kinetics was fitted with the pseudo-first-order kinetics at different pH to obtain the pseudo-first-order reaction constants (k(obs)). The second-order rate constants calculated from permanganate concentration and k,b, increased with the increase of pH and reached the maximum near their respective pKa, after which they decreased gradually. This tendency is called parabola-like shaped pH-rate profile. The second-order rate constants between permanganate and anilines were well fitted by the proton transfer model proposed by us in previous work.

Topics: Aniline Compounds; Hydrogen-Ion Concentration; Kinetics; Manganese Compounds; Oxidation-Reduction; Oxides; Potassium Permanganate