[Choice of revascularization procedure in obliterative disease of leg's distal arteries].

The results of surgery of the lower extremities' distal arterial occlusive lesions in 182 patients are analysed. The total number of surgical operations was 211. The doppler ultrasound examination and angiography were used to evaluate hemodynamic significance of the lesions.

Magnetic field-induced fluorescence changes in chlorophyll-proteins enriched with P-700.

Fluorescence yield dependence on external magnetic field (0-600 G) was measured for chlorophyll-protein complexes enriched with Photosystem I. Maximal relative changes of fluorescence yield at room temperature (1.0-2.

Magnetic field affects the fluorescence yield in reaction center preparations from Rhodopseudomonas spaeroides R-26.

Purified photochemical reaction centers from Rhodopseudomonas sphaeroides R-26 were reduced with Na2S2O4 so as to block their photochemical electron-transfer reaction. The magnetic field induced an increase in the emission yield. Our results support the hypothesis that under these conditions, charge recombination in the singlet radical pair composed of the oxidized primary donor and reduced primary acceptor predominantly generates the excited singlet state of the reaction cnter bacteriochlorophyll.

[Effect of a magnetic field on the fluorescence yield of Rhodopseudomonas sphaeroides cells of the wild strain and strain R-26. Relationship to temperature].

Fluorescence yield of Rhodopseudomonas sphaeroides cells whose primary acceptor is chemically reduced depends on the magnetic field tension. The maximal value of relative magnetic effect and the field value, at which the effect amounts to a half of the maximal value for R. sphaeroides wild strain and R-26, equal 3.

[Mechanism of photochemical oxidation of bacterioviridin].

The mechanism of bacterioviridin photochemical oxidation has been studied by the methods of ESR, flash-photolysis and low-temperature spectrophotometry. ESR spectrum of pigment cation-radical, a singlet line with H=11 G, g = 2.0027, has been recorded.