Features of proteolytic properties of tetraphenylporphyrin complex with lanthanide group metals.

Unlabelled: Demetallation of metalloporphyrin molecules is one of the essential degradation reactions in photosynthesis. The effect of metalloporphyrin nature on removal of central metals from tetraphenylporphyrin complexes based on lanthanide group metals (Dy, Er, Lu, Ho) has been studied. pH values, at which the metal ions leave the metalloporphyrin complex were established using two-phase spectrophotometric titration with potentiometric pH-control.

[Experimental and clinical bases for the use of antioxidants as agents for treating and preventing periodontitis].

The contribution of free-radical lipid and biopolymer oxidation to the pathogenesis of periodontitis is analyzed as reflected in published Russian and foreign literature. Enhanced autooxidation in periodontal tissue is shown to represent one of the mechanisms of the disease genesis, this prompting the use of antioxidants in the treatment an prophylaxis of periodontitis. Antioxidant effects on the course of the disease have been demonstrated experimentally and clinically.