Enhancement of Crystal Growth in Molten Salts by a Cocrystallization Agent: Synthesis and Luminescent Properties of Ce- and Eu-Doped La(SiS)I.

In this study, we present the growth of large (SiS)I ( = La, Ce) crystals, both undoped and doped with Ce and Eu. The synthesis process involves the utilization of an arc-melted precursor in conjunction with sulfur and KI. We investigate the role of Zr, Nb, Mo, and Ir as cocrystallization agents, facilitating the growth of relatively large (up to 6-7 mm) crystals.

[Effect of hyperoxic inhalations for athletes of different sports, including those who had COVID-19, when training in the middle altitude].

Objective: To identify hyperoxic inhalations on the functional state of the cardiorespiratory system of athletes of different sports, who have previously had COVID-19, when training in the middle altitude.

Material And Methods: The study included 64 elite athletes during the preparatory period. The studies were conducted in Kislovodsk in the middle altitude (1240 meters) on the Maloe Sedlo mountain, in the conditions of training camps.

[Robotic mechanotherapy in a complex of procedures for the functional state recovery of the neuromuscular system and peripheral hemodynamics in track-and-field athletes].

Unlabelled: The background of the study is caused by the need to develop methods of drug-free neuromuscular system and peripheral hemodynamics recovery of athletes to optimize their functioning after intense physical activity in current conditions of high sporting competition.

Objective: To develop a program of comprehensive recovery of neuromuscular apparatus and hemodynamics of the lower limbs of track-and-field athletes during intense physical activity, including mechanotherapy on the robotic biomechanical complex with biological feedback and to evaluate its efficacy, comparing with a standard recovery program.

Material And Methods: The study involved 23 track-and-field athletes (the mean age 24.

Machine Learning-Guided Discovery of Ternary Compounds Containing La, P, and Group 14 Elements.

We integrate a deep machine learning (ML) method with first-principles calculations to efficiently search for the energetically favorable ternary compounds. Using La-Si-P as a prototype system, we demonstrate that ML-guided first-principles calculations can efficiently explore crystal structures and their relative energetic stabilities, thus greatly accelerate the pace of material discovery. A number of new La-Si-P ternary compounds with formation energies less than 30 meV/atom above the known ternary convex hull are discovered.

Add a Pinch of Tetrel: The Transformation of a Centrosymmetric Metal into a Nonsymmorphic and Chiral Semiconductor.

Centrosymmetric skutterudite RhP was converted to a nonsymmorphic and chiral compound RhSi P (space group P2 2 2 ) by means of partial replacement of Si for P. The structure, determined by a combination of X-ray crystallography and solid state P NMR, exhibits branched polyanionic P/Si chains that are unique among metal phosphides. A driving force to stabilize the locally noncentrosymmetric cis-RhSi P and fac-RhSi P fragments is π-electron back-donation between the Rh t -type orbitals and the unoccupied antibonding Si/P orbitals, which is more effective for Si than for P.

Synthesis-enabled exploration of chiral and polar multivalent quaternary sulfides.

An innovative method of synthesis is reported for the large and diverse (RE)(TM) (Tt)S (RE = rare-earth, TM = transition metals, Tt = Si, Ge, and Sn) family of compounds (∼1000 members, ∼325 contain Si), crystallizing in the noncentrosymmetric, chiral, and polar 6 space group. Traditional synthesis of such phases involves the annealing of elements or binary sulfides at elevated temperatures. The atomic mixing of refractory components technique, presented here, allows the synthesis of known members and vastly expands the family to nearly the entire transition metal block, including 3d, 4d, and 5d TMs with oxidation states ranging from 1+ to 4+.

Third time's the charm: intricate non-centrosymmetric polymorphism in SiP ( = La and Ce) induced by distortions of phosphorus square layers.

Complex polymorphic relationships in the LnSiP3 (Ln = La and Ce) family of compounds are reported. An innovative synthetic method was developed to overcome differences in the reactivities of the rare-earth metal and refractory silicon with phosphorus. Reactions of atomically mixed Ln + Si with P allowed for selective control over the reaction outcomes resulting in targeted isolation of three new polymorphs of LaSiP3 and two polymorphs of CeSiP3.

[Evaluation of the influence of different physical and chemical composition mineral waters on the state of carbohydrate metabolism in experimental metabolic syndrome].

Unlabelled: Purpose of the study. To carry out a comparative analysis of the intake effect of mineral waters (MW) of various physicochemical compositions, including those ones enriched in selenium, on the pathogenesis of metabolic syndrome (MS) in the experiment.

Materials And Methods: The experiment was carried out on 68 male white rats aged 3 months, which were divided into 5 groups.

New Noncentrosymmetric Tetrel Pnictides Composed of Square-Planar Gold(I) with Peculiar Bonding.

Three novel isostructural equiatomic gold tetrel pnictides, AuSiAs, AuGeP, and AuGeAs, were synthesized and characterized. These phases crystallize in the noncentrosymmetric (NCS) monoclinic space group Cc (no. 9), featuring square-planar Au within cis-[AuTt Pn ] units (Tt=tetrel, Si, Ge; Pn=pnictogen, P, As).

[To the 100th anniversary of the founding of the Pyatigorsk research institute of balneology].

The article is dedicated to the 100th anniversary of the Pyatigorsk state research Institute of balneology. It presents the main stages of formation and development, scientific achievements of the Institute and highlights the main activities at the present stage.

[Effects of application of transcranial electrical stimulation in the training process at elite athletes of various sports].

Unlabelled: Restoring and optimizing the psychofunctional state of the athlete's body is an important area of sports medicine. Methods that allow you to quickly level psychoemotional and physical stress by influencing regulatory systems are interesting. Transcranial Direct Current Stimulation (tDCS) refers to such methods.

Superhard Tungsten Diboride-Based Solid Solutions.

Solid solutions of tungsten diboride (WB) with increasing substitution of tungsten (W) by tantalum (Ta) and niobium (Nb)-ranging from 0 to 50 at. % on a metals basis-were synthesized through resistive arc melting. Samples were characterized using a combination of powder X-ray diffraction (PXRD) for phase identification, energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy for elemental composition, Vickers microindentation for hardness measurements, and thermogravimetric analysis for thermal stability.

Investigation of ternary metal dodecaborides (MMM)B (M, M and M = Zr, Y, Hf and Gd).

Samples of metal borides with a nominal composition of ((M1)(1-x-z)(M2)(x)(M3)(z)) : 20B (M1, M2 and M3 = Zr, Y, Hf and Gd) were prepared by arc-melting and studied for phase composition (using powder X-ray diffraction (PXRD) and energy dispersive X-ray spectroscopy (EDS)) and mechanical properties (Vickers hardness). Ternary metal dodecaboride phases were successfully synthesized for the majority of compositions, including stabilization of two high-pressure (6.5 GPa) phases (cubic-UB12 structure), HfB12 and GdB12, in (Zr1-x-zHfxGdz) : 20B and (Y1-x-zHfxGdz) : 20B nominal alloy compositions.

Effects of Variable Boron Concentration on the Properties of Superhard Tungsten Tetraboride.

Tungsten tetraboride is an inexpensive, superhard material easily prepared at ambient pressure. Unfortunately, there are relatively few compounds in existence that crystallize in the same structure as tungsten tetraboride. Furthermore, the lack of data in the tetraboride phase space limits the discovery of any new superhard compounds that also possess high incompressibility and a three-dimensional boron network that withstands shear.

Rediscovering the Crystal Chemistry of Borides.

For decades, borides have been primarily studied as crystallographic oddities. With such a wide variety of structures (a quick survey of the Inorganic Crystal Structure Database counts 1253 entries for binary boron compounds!), it is surprising that the applications of borides have been quite limited despite a great deal of fundamental research. If anything, the rich crystal chemistry found in borides could well provide the right tool for almost any application.

Stabilization of LnB (Ln = Gd, Sm, Nd, and Pr) in ZrLnB under Ambient Pressure.

We report ambient pressure stabilization of a previously synthesized high-pressure (6.5 GPa) phase, GdB, in a ZrGdB solid solution (with ∼54 at. % Gd solubility, as determined by both powder X-ray diffraction and energy-dispersive spectroscopy).

[THE COMPARATIVE CHARACTERISTIC OF KAOLIN-ACTIVATED THROMBOELASTOGRAPHY IN HEALTHY NEWBORNS AND NEWBORNS WITH HEART AILMENTS].

The study was carried out to diferentiate reference values for kaolin-activated thromboelastography in newborns with congenital heart disease. The study included two groups ofpatients. The first one consisted of 62 newborns with congenital heart disease and the second one consisted of 35 healthy newborns.

Stabilization of HfB12 in Y1-xHfxB12 under Ambient Pressure.

Alloys of metal dodecaborides-YB12 with HfB12-were prepared via arc-melting in order to stabilize the metastable HfB12 high-pressure phase under ambient pressure. Previously, HfB12 had been synthesized only under high-pressure (6.5 GPa).

Extrinsic Hardening of Superhard Tungsten Tetraboride Alloys with Group 4 Transition Metals.

Alloys of tungsten tetraboride (WB4) with the group 4 transition metals, titanium (Ti), zirconium (Zr), and hafnium (Hf), of different concentrations (0-50 at. % on a metals basis) were synthesized by arc-melting in order to study their mechanical properties. The phase composition and purity of the as-synthesized samples were confirmed using powder X-ray diffraction (PXRD) and energy dispersive X-ray spectroscopy (EDS).

[Cases of West Nile fever in Novosibirsk region in 2004, and the genotyping of its viral pathogen].

Three cases of West Nile fever were registered for the first time in Novosibirsk region in 2004. The diagnosis was confirmed by revealing IgG against West Nile virus (three cases) and viral RNA (two cases). Sequence analysis of fragments of E protein gene showed that the virus belonged to Ia genotype.

[Prognostic significance of neurophysiological parameters in nontraumatic apallic syndrome].

The time course of neurophysiological parameters (EEG, evoked potentials of various modalities, including P300, and polysomnography) was followed up in 10 patients with apallic syndrome (AS) of nontraumatic origin (heart arrest, stroke, neuroinfection, etc.) during the formation of the syndrome and the condition of various severity: incomplete formation of AS eventuating in gross psychoneurological defects and complete formation of AS (a stable vegetative state). A dynamic follow-up of not only EEG of awaken and sleeping patients, but of their evoked potentials, specifically somatosensory and P300, were shown to be significant for assessment of the course of AS and prediction of its outcome.