Limits on light-speed anisotropies from Compton scattering of high-energy electrons.

The possibility of anisotropies in the speed of light relative to the limiting speed of electrons is considered. The absence of sidereal variations in the energy of Compton-edge photons at the European Synchrotron Radiation Facility's GRAAL facility constrains such anisotropies representing the first nonthreshold collision-kinematics study of Lorentz violation. When interpreted within the minimal standard-model extension, this result yields the two-sided limit of 1.6×10(-14) at 95% confidence level on a combination of the parity-violating photon and electron coefficients (κ(o+))(YZ), (κ(o+))(ZX), c(TX), and c(TY). This new constraint provides an improvement over previous bounds by 1 order of magnitude.

Simultaneous photoproduction of eta and pi0 mesons on the proton.

The analysis of the gammap-->etapi(0)p reaction has been performed using data from the GRAAL experiment. The total and differential cross sections and the beam asymmetry have been obtained from threshold up to 1.5 GeV of beam energy. The two resonances S11(1535) and Delta(1700) are expected to be excited in the intermediate states of this reaction. The results are used to test predictions based on the assumption that both resonances are dynamically generated from the meson-baryon interaction provided by chiral Lagrangians. The term involving the Delta(1700) excitation, followed by the decay into etaDelta(1232), is found to be dominant.

Evidence for nucleon-resonance excitation in omega-meson photoproduction.

The photoproduction of the omega meson has been studied at GRAAL from threshold up to a photon energy of 1.5 GeV. The differential cross sections and beam asymmetries have been measured precisely at all angles. The total cross section is also obtained. Systematic enhancements of the differential cross section at large angles and nonzero beam asymmetries at intermediate angles provide clear evidence for s- and u-channel resonant processes. The data are compared to the results of hadron and quark models.

Double pi(0) Photoproduction on the Proton at GRAAL.

The double pi(0) photoproduction off the proton has been measured in the beam energy range of 0.65-1.5 GeV. The total and differential cross sections and the Sigma beam asymmetry were extracted. The total cross section measured for the first time in the third resonance region of the nucleon shows a prominent peak. The interpretation of these results by two independent theoretical models infers mostly the selective excitation of P11- and D13-nucleon resonances.

[Directed therapy in complex treatment of lower limb diabetic angiopathy]. / Metody napravlennoi terapii v kompleksnom lechenii diabeticheskoi angiopatii nizhnikh konechnostei.

Clinical efficiency of directed therapy was assessed for 312 patients with distal type of lower limb diabetic angiopathy. Methods of directed therapy included indirect electrochemical detoxication, hemosorption and their combination. It was shown that while successful rate of conventional conservative therapy does not exceed 50%, hemosorption and indirect electrochemical detoxication can increase this rate by 5-35%, depending on the initial severity of lower limb ischemia. Directed therapy improves peripheral circulation and attenuates regional toxemia. Optimal results were achieved for combination of hemosorption and indirect electrochemical detoxication: treatment was effective for 87% of patients with 2-grade disease and for 73% - with 3-grade. One can speculate that synergic clinical effect may be attributed to functional normalization of antioxidant system. In conclusion, advantages of directed therapy comparing with conventional conservative treatment lie in its higher efficiency and prolonged therapeutic effect.

[Mechanism of action of paravasal infiltration]. / O mekhanizme deistviia paravazal'noi infiltratsii.

In order to study the mechanisms of action of paravasal infiltration the content of middle mass molecules and general thiol groups in the central and regional blood flow were studied in 65 patients with obliterating atherosclerosis. The relationship between the stage of extremity ischemia and concentration of general thiol groups was shown.

[Effectiveness of pathogenetic treatment of arterial obliterative diseases of the extremities]. / Vozmozhnosti patogeneticheskogo lecheniia obliteriruiushchikh zabolevanii arterii konechnostei.

The authors studied the activity of blood serum amine oxidase in patients with atherosclerosis obliterans and endarteritis obliterans. It was found that amine oxidase activity exceeded the normal value. 2.6 times in patients with stage 1-2 atherosclerosis obliterans and was reduced by more than 12 times in patients with stage 3-4 of the disease. The activity of the enzyme was absent in patients with endarteritis obliterans, whatever the stage of limb ischemia. On the basis of the obtained facts, the authors voice a new opinion on the nature of hypercatecholaminemia in obliterative diseases and suggest a new trend in the treatment of chronic ischemia of the limbs-activation of the processes of catabolism of vasoconstrictive biogenic amines.

[Serum amine oxidase activity and the methods of its correction in patients with arterial occlusive diseases of the extremities]. / Aktivnost' aminooksidazy syvorotki krovi i metody ee korrektsii u bol'nykh obliteriruiushchimi zabolevaniiami arterii konechnostei.

The article presents results of examination of blood serum ++amine oxidase++ in 78 patients with obliterating diseases of the extremity arteries. It was found that enzyme activity was dependent on the form and stage of the disease. The data obtained were used for the examination and medicamentous correction of the enzyme activity.

[A device for complex field irradiation on gamma-teletherapy apparatus]. / Komplekt dlia slozhnopol'nogo oblucheniia k dal'nedistantsionnym gamma-terapevticheskim apparatam.

The use of irregular fields formed for each individual patient became a routine clinical method of irradiation of systemic malignant tumors. It allowed one to improve the therapeutic effectiveness of radiation therapy. A set for irregular field irradiation using gamma-beam therapy apparatus was developed. The set includes equipment for preirradiation preparation, for irradiation and its control. The trials of the set have shown that its parameters meet all necessary requirements. The set was recommended by the USSR Ministry of Health into clinical practice.