Electronic structure of Co_xTiSe_2 and Cr_xTiSe_2

The results of investigations of intercalated compounds Cr_xTiSe_2 and Co_xTiSe_2 by X-ray photoelectron spectroscopy (XPS) and X-ray emission spectroscopy (XES) are presented. The data obtained are compared with theoretical results of spin-polarized band structure calculations. A good agreement between theoretical and experimental data for the electronic structure of the investigated materials has been observed. The interplay between the M3d--Ti3d hybridization (M=Cr, Co) and the magnetic moment at the M site is discussed. A 0.9 eV large splitting of the core Cr2p{3/2} level was observed, which reveals a strong exchange magnetic interaction of 3d-2p electrons of Cr. In the case of a strong localization of the Cr3d electrons (for x<0.25), the broadening of the CrL spectra into the region of the states above the nominal Fermi level was observed and attributed to X-ray re-emission. The measured kinetic properties are in good accordance with spectral investigations and band calculation results.Comment: 14 pages, 11 figures, submitted to Phys.Rev.

SYNTHESIS OF (2-ARYLQUINAZOLIN-4-YL)HYDRAZONES OF 2-HYDROXYBENZALDEHYDES AS POTENTIAL PHOSPHOINOSITIDE 3-KINASE (IP3Kδ) AND CASEIN KINASE 2 (CK2) INHIBITORS

This work was supported by the Ministry of Science and Higher Education of Russian Federation, State Contract no FEUZ-2020-0058 (Н687.42Б.223/20)

Correlation of forms of psychological protections, styles of humor and motivation on power of students

The article presents the results of a study of the relationship of forms of psychological defenses, styles of humor and motivation to the power of students in the first year of the pediatric faculty.В статье представлены результаты исследования связи форм психологических защит, стилей юмора и мотивации на власть обучающихся на первом курсе педиатрического факультета

Resonant Inelastic X-Ray Scattering from Valence Excitations in Insulating Copper-Oxides

We report resonant inelastic x-ray measurements of insulating La$_2$CuO$_4$ and Sr$_2$CuO$_2$Cl$_2$ taken with the incident energy tuned near the Cu K absorption edge. We show that the spectra are well described in a shakeup picture in 3rd order perturbation theory which exhibits both incoming and outgoing resonances, and demonstrate how to extract a spectral function from the raw data. We conclude by showing {\bf q}-dependent measurements of the charge transfer gap.Comment: minor notational changes, discussion of anderson impurity model fixed, references added; accepted by PR

CK2 Inhibition and Antitumor Activity of 4,7-Dihydro-6-nitroazolo[1,5-a]pyrimidines

Today, cancer is one of the most widespread and dangerous human diseases with a high mortality rate. Nevertheless, the search and application of new low-toxic and effective drugs, combined with the timely diagnosis of diseases, makes it possible to cure most types of tumors at an early stage. In this work, the range of new polysubstituted 4,7-dihydro-6-nitroazolo[1,5-a]pyrimidines was extended. The structure of all the obtained compounds was confirmed by the data of 1H, 13C NMR spectroscopy, IR spectroscopy, and elemental analysis. These compounds were evaluated against human recombinant CK2 using the ADP-GloTM assay. In addition, the IC50 parameters were calculated based on the results of the MTT test against glioblastoma (A-172), embryonic rhabdomyosarcoma (Rd), osteosarcoma (Hos), and human embryonic kidney (Hek-293) cells. Compounds 5f, 5h, and 5k showed a CK2 inhibitory activity close to the reference molecule (staurosporine). The most potential compound in the MTT test was 5m with an IC50 from 13 to 27 µM. Thus, our results demonstrate that 4,7-dihydro-6-nitroazolo[1,5-a]pyrimidines are promising for further investigation of their antitumor properties. © 2022 by the authors.Ministry of Education and Science of the Russian Federation, Minobrnauka: FEUZ-2020–0058, H687.42B.223/20This work was financially supported by the Ministry of Science and Higher Education of the Russian Federation, State Contract № FEUZ-2020–0058 (H687.42B.223/20)

Prevalence and modern aspects of the treatment of patients with Barrett’s esophagus

The article analyzes the prevalence and principles in treatment of Barrett’s esophagus. The prevalence of Barrett’s esophagus varies widely from region to region of the world and has ethnic differences. The use of endoscopic methods and the histological examination of the biopsies of esophageal mucosa are of utmost importance in the diagnosis of this pathology. The prevention of esophageal cancer is the main task in managing patients with Barrett’s esophagus. The length of the Barrett’s esophagus segment, the presence and extent of dysplasia is of the greatest importance to select tactics for managing patients. Endoscopic methods are widely used for the eradication of metaplasia sites, among which the radiofrequency ablation is the most effective one. Prolonged treatment with proton pump inhibitors is safe and reduces the risk of transformation of Barrett’s esophagus into adenocarcinoma of the esophagus. There is evidence that small doses of aspirin, nonsteroidal anti-inflammatory drugs, statins and ursodeoxycholic acid have the preventive effect on the development of esophageal cancer. However, the possibilities of using these drugs for this purpose are still limited. Anti-reflux surgery still holds relevance, but at the same time, it has no advantages over the drug therapy for the prevention of esophageal cancer