Hygienic assessment of the working conditions of a nurse in functional diagnostics rooms

The purpose of the study is to study the factors of the labor process of a medical worker in functional diagnostics offices and to assess the health risk from exposure to adverse factors.Цель исследования - изучить факторы трудового процесса медицинского работника кабинетов функциональной диагностики и оценить риск здоровья от воздействия неблагоприятных факторов

Role of the solitary tract nucleus and caudal ventrolateral medulla in temperature responses in endotoxemic rats

In experiments on conscious rats it was found that preliminary microinjection of 100 nl 100 μM glutamic acid to the rostral commissural part of the solitary tract nucleus or to the caudal ventrolateral medulla increased a rise in colonic temperature induced by systemically applied endotoxin (3 µg/kg Escherichia coli lipopolysaccharide, i.p.) as compared to animals with intrabulbar injection of vehicle (control group). Preliminary microinjection of glutamate to the caudal commissural part of the solitary tract nucleus levelled the endotoxininduced temperature response. After glutamate treatment of the caudal ventrolateral medulla there was a significant decrease in the noradrenaline content and decrease in the adrenaline level in the caudal (not significant) and rostral ventrolateral medulla (significant), as well as a small rise in noradrenergic activity at the solitary tract nucleus as compared to control animals. The post-mortem measurement of the optical density of brainstem tissues revealed its significant attenuation at the solitary tract nucleus and caudal ventrolateral medulla after glutamate as compared with these structures after vehicle. The involvement of monoaminergic systems of both structures under study in the initiation and control of temperature responses during endotoxemia is suggested

Experimental and theoretical investigation of the electronic structure and optical properties of TlHgCl3 single crystal

We have synthesized single crystals of TlHgCl3, which posses an orthorhombic symmetry, space group Pnma, with lattice constants a = 9.1601(4) angstrom, b = 4.3548(2) angstrom and c = 14.0396(5) angstrom. The measurements of the optical absorption of TlHgCl3 are performed on parallel-plate samples with polished optical quality surfaces of d = 0.03 mm. The band gap is estimated to be 2.74 eV from the position of fundamental absorption edge at alpha = 200 cm(-1). We have used our measured crystallographic data of TlHgCl3 as input data for calculating the electronic band structure, density of states, electronic charge density and the optical properties. The all-electron full potential linearized augmented plane wave plus local orbital (FP-L(APW + lo)) method is used. Calculations are performed with three types of exchange correlations; local density approximation (LDA), general gradient approximation (PBE-GGA) and the recently modified Becke-Johnson potential (mBJ). The PBE-GGA is used to optimize the atomic positions by minimization of the forces (1 mRy/au) acting on the atoms. The obtained values of the band gap from various exchange correlations are 2.39 eV (LDA), 2.55 eV (PBE-GGA) and 2.69 eV (mBJ). It is clear that mBJ succeeded by a large amount in bringing the calculated energy gap closer to the experimental one. The calculated electronic band structure exhibits that the conduction band minimum and the valence band maximum are located at Z point of the BZ, resulting in a direct band gap. The calculated density of states provides information about the hybridization between the states and the bonding nature. The electronic charge density show that Hg and Cl atoms form partial ionic/covalent bonding between Cl-Hg-Cl. Furthermore, for a deep insight into the electronic structure we have investigated the optical properties

Searching for better X-ray and gamma-ray photodetectors: structure-composition properties of the TlPb2Br5-xIx quaternary system

Developing X-ray and gamma-ray detectors with stable operation at ambient temperature and high energy resolution is an open challenge. Here, we present an approach to search for new detector materials, combining binary photodetector compounds. More specifically, we explore quaternary TlPb2Br5-xIx compositions, relying on materials synergy between TlBr, TlI, and PbI2 photodetectors. We discover a broad solid solution in the TlPb2Br5-'TlPb2I5' section, which can be derived from a new quaternary compound, TlPb2BrI4, by partial substitution of Br by I atoms on the 4c site or by replacement of I by Br atoms on the 16l site. We carry out a thorough crystallographic analysis of the new TlPb2BrI4 compound and prepare a high-quality standardized structure file. We also complete the phase diagram of the TlPb2Br5-'TlPb2I5' section, based on 21 alloys. Furthermore, we synthesize a series of high quality centimeter-sized TlPb2Br5-xIx single crystals (x = 2, 2.5, 3, 3.5, 4, 4.5) by the Bridgman-Stockbarger method and study their structure and properties using a combination of experimental techniques (X-ray diffraction, X-ray photoelectron spectroscopy, and absorption spectroscopy) and theoretical calculations.ISSN:2633-540