Phase Filters for 3D Localization of Point Light Sources

The work relates to the engineering and research of phase filters for three-dimensional localization of point light emitters. These phase filters form a light field having two clearly visible maxima in their intensity distribution (i.e. two-lobe fields). By means of numerical simulation, the influence of the amplitude and phase distortions of the wave front of the illuminating beam on the two-lobe field formation has been studied in the work. Keywords: spiral light beams, amplitude distortions, phase distortions, threedimensional localization, two-lobe field

Technological mineralogy: development of a comprehensive assessment of titanium ores (exemplified by the Pizhemskoye deposit)

Technological mineralogy of titanium ores is the basis for assessing their complexity. It enables, from a unified standpoint, to trace the entire course of changes in mineral matter through operating procedures, including beneficiation, processing, and obtaining target industrial products. The study targets are Pizhemskoye ilmenite-leucoxene sandstones, which are distinguished by a complex polymineral composition. Along with the main ore components, there are other metals with different speciation (isomorphic admixture, independent mineral phases). The optimal set of mineralogical analysis methods for the predictive assessment of their further use is substantiated exemplified by titanium ores of the Pizhemskoye deposit, which are complex, noted for a variable content of iron oxides and contain rare earth metals. Examinations by X-ray phase analysis and scanning electron microscopy confirm that the main titanium phases of sandstones are pseudorutile and a polymineral aggregate, “leucoxene”. Considering the granulometric peculiarities of the magnetic and non-magnetic fractions of the gravity concentrate, the prospects of technologies for processing titanium raw materials are discussed. Along with the problems of obtaining high-quality raw materials, the transformations of mineral phases as a result of extreme impacts and their physicochemical properties as a consequence of isomorphic substitution of a part of Ti atoms with natural modifier agents (Fe and V) in the synthesis of titanium oxide nanostructures for industrial applications are considered (photocatalytic nanoreactor)

The effect of the laser-induced structures’ surface morphology on the luminescence of thermostable polybenzimidazoles

This study was performed in the framework of the RFBR grant Mol_а 18-33-00645

Method of predicting recurrence and monitor the effectiveness of treatment of vulvovaginal candidiasis

They were examined 60 patients of child-bearing age, of whom 20 healthy women (group I) and 40 patients with chronic recurrent vulvovagi-nal candidiasis with different frequency of recidivating: II grou p-1-2 times per year, and III the group - 3 to 5 times once a year. We investigated the intensity of lipid peroxidation and activity of antioxidant protection system. All investigated parameters in patients with recurrent vulvovaginal candidi-asis discovered the differences from the norm, the degree of which is directly proportional to the frequency of relapses of the disease.Обследовано 60 пациенток фертильного возраста, из них 20 практически здоровых женщин (I группа) и 40 больных, страдающих рецидивирующим кандидозным вульвовагинитом с различной частотой обострений: II группа - с обострениями вульвовагинита 1-2 в год и III группа с обострениями вульвовагинита от 3 до 5 раз в год. Оценивали интенсивность перекисного окисления липидов и активность антиоксидантной системы защиты. Все исследуемые показатели у больных с рецидивирующим кандидозным вульвовагинитом обнаружили отличия от нормы, степень которых оказалась прямо пропорциональна частоте рецидивов заболевания

Thermochemical characteristics of the formation of aqueous solutions of imino acids

The calorimetry methods are an important source of thermodynamic information in the physicochemistry of solutions of biologically active substances, including amino acids. The goal of the work was to prepare a thermodynamic description of the formation of an aqueous solution of heterocyclic imino acids, proline and hydroxyproline, that have different structures and sizes of the side radical, in a wide range of concentrations, which can be used for a qualitative analysis of changes occurring in their solutions. Thermochemical measurements of the formation of an aqueous solution of imino acids in the concentration range 1.0·10-3 – 40.0·10-3 mol/kg was performed on a MID-200 differential heat-conducting microcalorimeter at 293 K. The equilibrium moment in the solution formation was determined by the output of the thermokinetic curve to the zero line. The enthalpy of the formation of an aqueous solution of imino acids was calculated by the integration of the time dependence of thermal power. It is shown that the increase in the equilibrium time, the increase in the maximum heat flow, and the decrease in the rate of change of the heat flow during the dissolution of hydroxyproline is due to the formation of intra and intermolecular bonds in the Hypro structure with the participation of the OH group. The difference in the structure of imino acids is reflected in the sign of the thermal effect and the form of the concentration dependence of the enthalpy of formation of aqueous solutions. The exoeffect of proline dissolution is due to the stabilisation of the water structure influenced by imino acid