Conditions for the formation of a non-autonomous phase at the structural deformation of complex vanadium oxides

Received: 02.03.2018. Accepted: 10.04.2018. Published: 10.05.2018.A new previously unknown effect of a reversible transition from a singlephase system to a heterophase system containing a non-autonomous phase was observed during thermal and chemical deformations of the Zn2–2xCd2xV2O7 structure.The role of local symmetry in the formation of the non-autonomous phase is shown on the basis of X-ray diffraction studies in situ and a comparative crystal-chemical analysis of the structural deformations of isoform monoclinic solid solutions of zinc and copper pyrovanadates with zero volumetric thermal expansion.The work was supported by UB RAS (project 18-10-3-32)

Spatiotemporal dynamics of the wind velocity variance from the data of acoustic sounding of the atmospheric boundary layer

In the report spatiotemporal dynamics of the variance of three components of the wind velocity in the atmospheric boundary layer retrieved from measurements with a Doppler mini-sodar is analyzed. During measurements, the variances of the x- and y-components of the wind velocity were in the range 0.001 ≤ Dx, Dy ≤ 10 m2/s2; for the z-component 0.001 ≤ Dz ≤ 1.2 m2/s2. Their increase in the morning hours (at about 11:00, local time) and in the evening hours (from 18:00 till 22:00, local time) was noticed. This was explained by warming and subsequent cooling of the Earth surface accompanied by strengthening of motion of air masses. At night (from 00:00 till 5:00, local time), 0.01 ≤ Dz ≤ 0.56 m2/s2, which is in good agreement with the literature data. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

THERAPEUTIC EXERCISE FOR PATIENTS WITH ANKYLOSING SPONDYLITIS: RECOMMENDATIONS AND REALITY

Objective. To study how the patients with ankylosing spondylitis (AS) follow recommendations for performing physi- cal exercises. Material and methods. To clarify the compliance of patients with AC to physical exercise, a special questionnaire was designed. The Exercise Benefits/Barriers Scale (EBBS) was used to assess the perception of physical exercises. The study included 79 patients (the mean age of 34.5 ± 9.4 years) with AS (diagnosed according to the New York criteria) who have been treated at the clinic of V.A. Nasonova Research Institute of Rheumatology of the Russian Academy of Medical Sciences. Results. Of the 79 patients included in the study, 77.2% were doing therapeutic exercises; 41.0% of patients were doing them every day. 41.0% of the patients have received sets of exercises from the attending doctor, 41.0 % from the Internet, and 18.0% from other sources (brochures for patients or courses for patients with AS). The average total EEBS score was 114.2 ± 17.8 points; the benefits score was 87.1 ± 12.8; and the barriers score was 27.1 ± 5.0. The most frequent responses to question about the benefits of physical exercises were as follows: «They reduce the feeling of stress and tension» (90.6%) and «They increase the muscle strength» (93.7%). «I am tired physically from doing exercises» (96.6%) was the most common barrier to execution of physical exercises. Conclusion. Despite the positive perception of physical exercises, only 41.0% of the patients with AS have done them every day. The lack of information about exercises recommended for AS patients, the frequency of their use, the effect on the disease activity and functionality significantly limits the use of exercises by patients with AS. It remains unclear exactly, which sets of exercises are most effective and what regularity of exercises should be used to prevent impair- ment of the functions of the spine and joints

Sol-gel synthesis and crystal chemical properties of the pigment Zn1.9Cu0.1SiO4

Received: 06.12.2018. Accepted: 21.12.2018. Published: 31.12.2018.The pigment Zn1.9Cu0.1SiO4 was obtained by the method of sol-gel synthesis. The crystallization temperature was set at 776 °C, ΔH ≈ –16.3 kJ / mol. Thermal expansion of the individual Zn2SiO4 and Zn1.9Cu0.1SiO4 solid solutions was studied by in situ high-temperature X-ray diffraction. It is shown that the substitution of Zn2+ → Cu2+ does not lead to significant changes in the lattice parameters; in the range from room temperature to 800 °C the structure expands monotonically when heated. The coefficients of volumetric thermal expansion for Zn2SiO4 and Zn1.9Cu0.1SiO4 are αV = 8.05 · 10–6 and 8.81 · 10–6 1 / K, respectively. The colorimetric coordinates in the RGB system are 71.8 % red, 72.9 % green and 79.6 % blue, which corresponds to the gray-blue pigment.The work was supported by UB RAS (project 18‑10‑3‑32)

Анкилозирующий спондилит в сочетании с комбинированным аутовоспалительным поражением кожи (клиническое наблюдение и обзор литературы)

We present a clinical case of combination of axial spondyloarthritis (axSpA) and chronic recurrent skin lesions in the form of acne conglobata, hidradenitis suppurativa (HS) with fistulous tracts formation. During the diagnostic search, the following diseases were considered: HS, SAPHO syndrome (synovitis, acne, pustulosis, hyperostosis, osteitis), PASS syndrome (pyoderma gangrenosum, acne, ankylosing spondylitis, HS). The choice of therapy in this patient and the possibility of using biologic disease-modifying antirheumatic drugs for axSpa and concomitant autoinflammatory skin process are discussed.Представлено клиническое наблюдение, в котором имелось сочетание аксиального спондилоартрита (аксСпА) и хронического рецидивирующего поражения кожи в виде конглобатных акне, гнойного гидраденита (ГГ) с формированием свищевых ходов. В ходе диагностического поиска рассматривались следующие заболевания: ГГ, синдром SAPHO (синовит, акне, пустулез, гиперостоз, остеит), PASS-синдром (гангренозная пиодермия, акне, анкилозирующий спондилит, ГГ). Обсуждаются выбор терапии у данного пациента и возможности использования генно-инженерных биологических препаратов при аксСпа и сопутствующем аутовоспалительном кожном процессе