Revised Correlation between Odin/OSIRIS PMC Properties and Coincident TIMED/SABER Mesospheric Temperatures

The Optical Spectrograph and Infrared Imaging System (OSIRIS) instrument on board the Odin satellite detects Polar Mesospheric Clouds (PMCs) through the enhancement in the limb-scattered solar radiance. The Sounding of the Atmosphere using the Broadband Emission Radiometry (SABER) instrument on board the TIMED satellite is a limb scanning infrared radiometer that measures temperature and vertical profiles and energetic parameters for minor constituents in the mesosphere and lower thermosphere. The combination of OSIRIS and SABER data has been previously used to statistically derive thermal conditions for PMC existence [Petelina et al., 2005]. a, A.A. Kutepov, W.D. Pesnell, In this work, we employ the simultaneous common volume measurements of PMCs by OSIRIS and temperature profiles measured by SABER for the Northern Hemisphere summers of 2002-2005 and corrected in the polar region by accounting for the vibrational-vibrational energy exchange among the CO2 isotopes [Kutepov et al., 2006]. For each of 20 coincidences identified within plus or minus 1 degree latitude, plus or minus 2 degrees longitude and less than 1 hour time the frost point temperatures were calculated using the corresponding SABER temperature profile and water vapor densities of 1,3, and 10 ppmv. We found that the PMC presence and brightness correlated only with the temperature threshold that corresponds to the frost point. The absolute value of the temperature below the frost point, however, didn't play a significant role in the intensity of PMC signal for the majority of selected coincidences. The presence of several bright clouds at temperatures above the frost point is obviously related to the limitation of the limb geometry when some near- or far-field PMCs located at higher (and warmer) altitudes appear to be at lower altitudes

Investigation of bone tissue mechanical properties in the supra-acetabular region

Introduction The investigation of the trabecular bone strength in the acetabular area and its dependence on age and gender may provide a theoretical basis for the development of implants for bone replacement. The purpose of this study was to determine the mechanical characteristics of the bone tissue in the supra-acetabular region in patients of different age groups. Materials and methods The cadaveric material of 60 patients was studied and included 20 young patients (age range, 18 to 44), 20 middle-aged patients (age range 45 to 59) and 20 elderly patients (age range, 60 to 74). Fragments of bone tissue 3 × 3 × 1.5 cm in size were removed from the supraacetabular region using an osteotome. Cylindrical specimens, 6 mm in diameter and 9 mm high, were produced from these fragments using a crown cutter. All samples were subjected to uniaxial compression at a loading rate of 1 mm/min. Results Comparison of male patients for each of the mechanical parameters did not reveal age differences (p > 0.05). In women of different age groups, the magnitude of elastic deformation was significantly different both by multiple analysis and in pairwise comparison of groups (p 0.05). Discussion The data obtained on the mechanical behavior of the trabecular bone and the values of the strength parameters are explained by the spatial arrangement of the fibers of structural proteins, the cross-linking profile of collagen, the degree of matrix mineralization, the structure of hydroxyapatite, and the amount of bound water. Conclusion In male patients, mechanical characteristics of the bone tissue in the supra-acetabular region do not change significantly with age. In women, the value of elastic deformation increases significantly with age. The maximum tensile strength and modulus of elasticity in women of different ages did not show any changes © Udintseva M.Yu., Zaitsev D.V., Volokitina E.A., Antropova I.P., Kutepov S.M., 202

CLINICAL EFFICACY OF ALBUMIN DIALYSIS THERAPY FOR PATIENTS WITH HEPATORENAL SYNDROME

34 patients (23 male, 11 female) in the age of 41–77 years (mean age 59,7 ± 4,2 years) with 2 type hepatorenal syndrome were included in the study. All patients were divided in 3 groups. The 1st group (n = 15) was treated by medical treatment, the 2nd group (n = 12) was treated by medical treatment and hemodiafiltration and the 3rd group (n = 7) – combined treatment with MARS therapy. Outcomes showed that combined therapy with addition of MARS provides positive results in treatment of the patients with 2 type hepatorenal syndrome

Features of high-dose intravenous immunotherapy administration in patients with reduced IgA level in neurological practice: literature review and description of a clinical case

Intravenous high-dose immunotherapy is one of the highly effective proven treatments for a number of autoimmune diseases of the nervous system. Nowadays there is enough knowledge about the spectrum of side effects and approaches to their prevention and monitoring. Most of them are leveled by improving the technology of the production process, but anaphylactic reactions remain one of the uncontrolled, albeit rare, undesirable reactions. The development of allergic reactions is associated with the presence of antibodies to immunoglobulin class A (IgA) in the patient, which is manifested by a decrease in the level of IgA during routine immunological examination. The article provides a review of the literature on the prevalence of IgA deficiency, its causes. A modern view of the need for routine testing of IgA level before the course of intravenous immunotherapy, approaches to reduce the risk of developing serious adverse reactions in such cases is described. A clinical case of treatment of a patient with chronic inflammatory demyelinating polyneuropathy and a reduced level of IgA is presented

Experimental Benchmarking of Pu Electronic Structure

The standard method to determine the band structure of a condensed phase material is to (1) obtain a single crystal with a well defined surface and (2) map the bands with angle resolved photoelectron spectroscopy (occupied or valence bands) and inverse photoelectron spectroscopy (unoccupied or conduction bands). Unfortunately, in the case of Pu, the single crystals of Pu are either nonexistent, very small and/or having poorly defined surfaces. Furthermore, effects such as electron correlation and a large spin-orbit splitting in the 5f states have further complicated the situation. Thus, we have embarked upon the utilization of unorthodox electron spectroscopies, to circumvent the problems caused by the absence of large single crystals of Pu with well-defined surfaces. Our approach includes the techniques of resonant photoelectron spectroscopy [1], x-ray absorption spectroscopy [1,2,3,4], electron energy loss spectroscopy [2,3,4], Fano Effect measurements [5], and Bremstrahlung Isochromat Spectroscopy [6], including the utilization of micro-focused beams to probe single-crystallite regions of polycrystalline Pu samples. [2,3,6

Dynamical mean-field approach to materials with strong electronic correlations

We review recent results on the properties of materials with correlated electrons obtained within the LDA+DMFT approach, a combination of a conventional band structure approach based on the local density approximation (LDA) and the dynamical mean-field theory (DMFT). The application to four outstanding problems in this field is discussed: (i) we compute the full valence band structure of the charge-transfer insulator NiO by explicitly including the p-d hybridization, (ii) we explain the origin for the simultaneously occuring metal-insulator transition and collapse of the magnetic moment in MnO and Fe2O3, (iii) we describe a novel GGA+DMFT scheme in terms of plane-wave pseudopotentials which allows us to compute the orbital order and cooperative Jahn-Teller distortion in KCuF3 and LaMnO3, and (iv) we provide a general explanation for the appearance of kinks in the effective dispersion of correlated electrons in systems with a pronounced three-peak spectral function without having to resort to the coupling of electrons to bosonic excitations. These results provide a considerable progress in the fully microscopic investigations of correlated electron materials.Comment: 24 pages, 14 figures, final version, submitted to Eur. Phys. J. for publication in the Special Topics volume "Cooperative Phenomena in Solids: Metal-Insulator Transitions and Ordering of Microscopic Degrees of Freedom

Studies of osteotropic action of ceramic material based on lantane zirconate in experiment

The article considers the possibility of using lanthanum zirconate as a new, promising osteotropic material. In modern traumatology, there is a need for osteotropic material that can fully correspond to native, intact bone tissue. To study osteotropic properties, we used the method of scanning electron microscopy, the method of uniaxial compression. According to the results of the study, it was concluded that lanthanum zirconate can be used as an osteotropic material.В статье рассмотрена возможность применения цирконата лантана в качестве нового остеотропного материала. В современной травматологии используют остеотропный материал, который не может полностью соответствовать нативной, интактной костной ткани в силу своих отличий по физико-химическим, механическим и биологическим свойствам. Для изучения остеоинтегративных свойств использовался экспериментальный метод, метод сканирующей электронной микроскопии, метод одноосного сжатия. По результатам исследования был сделан вывод о возможности применения цирконата лантана в качестве остетропного материал