Differentiation of the regions of the central federal district of the Russian Federation according to the level of competitive advantages

The article reveals the methodology of competitive positioning of the regions, based on the clustering of the initial key competitive indicators, including those reflecting the regional resource potentia

Bandwidth-controlled Mott transition in κ−(BEDT−TTF)2Cu[N(CN)2]BrxCl1−x\kappa-(BEDT-TTF)_2 Cu [N(CN)_2] Br_x Cl_{1-x} I. Optical studies of localized charge excitations

Infrared reflection measurements of the half-filled two-dimensional organic conductors $\kappa$-(BEDT-TTF)$_2$Cu[N(CN)$_{2}$]Br$_{x}$Cl$_{1-x}$ were performed as a function of temperature ($5 {\rm K}<T<300$ K) and Br-substitution ($x=0$, 40%, 73%, 85%, and 90%) in order to study the metal-insulator transition. We can distinguish absorption processes due to itinerant and localized charge carriers. The broad mid-infrared absorption has two contributions: transitions between the two Hubbard bands and intradimer excitations from the charges localized on the (BEDT-TTF)$_2$ dimer. Since the latter couple to intramolecular vibrations of BEDT-TTF, the analysis of both electronic and vibrational features provides a tool to disentangle these contributions and to follow their temperature and electronic-correlations dependence. Calculations based on the cluster model support our interpretation.Comment: 12 pages, 12 figure

New advances in Raman study of polyvinylchloride structure

In this work we investigated Raman spectra of a number of industrial grades of polyvinylchloride powder and films, prepared from solutions in tetrahydrofuran and acetophenone. The number and spectral characteristics of the Raman lines in the spectral regions of the C-Cl stretching vibrations and in the region of the C-H and CH2 stretching vibrations were evaluated

Laser Therapy in Correction of Optimization of Surgical Endointoxication

The problem of endointoxication remains one of the most urgent in modern surgery. The severity of the intoxication syndrome is determined not only by the intensity of the entry of toxic substances into the bloodstream from the lesion focus, but also by the adequacy of the functioning of the main mechanisms of detoxification - elimination of toxins. Clinical and laboratory studies of 62 patients with acute peritonitis were performed. To this end, daily sessions of laser therapy with “Matrix” were conducted for 5 days after the operation, using a head of KLO3 (radiation with a wavelength of 635 nm, 2 mW). Laser irradiation of blood through the skin in the projection of the ulnar vein was performed for 30 minutes. Using laser therapy for patients with acute peritonitis led to the reduction of the endogenous intoxication severity. The level of medium-mass molecules (λ = 280 nm) decreased by 13.3-26.2% compared to the control, the level of average-weight molecules (λ = 254 nm) decreased by 15.5-32.6% (p &lt;0.05) against the background of laser therapy. Thus, the use of laser therapy in patients with acute peritonitis has led to a decrease in the severity of endogenous intoxication. One of the significant components of this treatment is its ability to improve microcirculation and, as a result, to correct lipid peroxidation and hypoxia, which reduces catabolic phenomena (one of the sources of endogenous intoxication). Clinical and laboratory studies have established that the effectiveness of such treatment decreases with severe forms of peritonitis