Vacancy formation in a 1D chain of dust particles in a DC discharge.

The paper presents the first experimental observation of an atypical phenomena during self-organization of dust particles into a one-dimensional chain structure levitated vertically in the plasma of a DC glow discharge. Using a laser, the third (middle) dust particle was removed from the chain of five particles so that the positions of the remaining particles did not significantly change, and a vacancy occurred in the place of the removed particle. This state of the chain turned out to be very stable, which is confirmed by the observation of the subsequent exchange of places of the fourth and the fifth particles of the chain upon the action of the laser on the forth particle.

The Diagnostic and Prognostic Roles Played by Homocysteine and Other Aminothiols in Patients with Chronic Kidney Disease.

We examined standard clinical and laboratory biochemical parameters, as well as the levels of aminothiols in the blood and urine (homocysteine (Hcy), cysteine (Cys), S-adenosylmethionine (SAM), and S-adenosylhomocysteine (SAH)) via capillary electrophoresis in patients with CKD at stages II-V. Patient outcomes were assessed after five years. To complete forecasting, correlation and ROC analysis were performed.

Modification of topological corner excitations at the interplay of boundary geometry and Coulomb interaction.

The effect of Coulomb interaction on the 2D second order topological superconductor is investigated taking into account different geometries of the boundary in the mainframe of the mean-field approximation. The spontaneous symmetry breaking, described earlier in Aksenov(2023B125401), is found to be robust against the boundary deformation. Meanwhile, the details of the state with spontaneously broken symmetry is found to be dependent on the specific boundary geometry.

Mixed-Valence Np/An Molybdate Complexes with Single-Charge Outer-Sphere Cations.

Five new mixed-valence Np/An molybdates of the composition [C(NH)][(NpO)(NpO)(MoO)(HO)]·HO (), [C(NH)][(NpO)(NpO)(MoO)(HO)]·3HO (), Na[(NpO)(PuO)(MoO)(HO)]·HO (), Na[(NpO)(UO)(MoO)]·13HO (), and LiNa[(NpO)(NpO)(MoO)(HO)]·4HO () have been synthesized and structurally characterized. The coordination polyhedra of the Np and An atoms in compounds - are pentagonal bipyramids. The basis of structures - is anionic layers of the composition [(NpO)(AnO)(MoO)(HO)].

Quasielastic Light Scattering in the Broadband Brillouin Spectra of Relaxor Ferroelectric PbMgNbO.

In this paper, the behavior of quasielastic light scattering (QELS) in a PbMgNbO (PMN) crystal under broadband Brillouin light scattering in a temperature range from 750 K to 80 K was studied. It was shown that QELS consists of two components: narrow (0.9 GHz to 11 GHz) and wide (80 GHz to 600 GHz).

Solvent Extraction and Conformation Rigidity: Actinide(IV) and Actinide(VI) Come Together.

The first comprehensive structural and extraction study of a 2,2'-bipyridine-6,6'-dicarboxamide ( diamide) extractant for U, Np, Pu, Th, Am, and Eu ions showed great potential for actinide separation due to steric hindrance of the amidic side phenyl ring of the given compound. The study of the complexes of An(VI) and Th(IV) with 2,2'-bipyridyldicarboxamide-type extractants demonstrated the structure of the extraction species for the first time. Investigation of the extraction properties with the radiometric and millimolar quantities of actinides showed similar extraction trends.

Structural properties of a chain of dust particles in a field of external forces.

This paper presents a numerical study of the structural parameters of a one-dimensional chain of three dust particles levitating in the near-electrode layer of an rf discharge or in the stratum of a dc discharge. The model considers the motion of dust particles under the action of gravity, external electric field, the Coulomb repulsion, and the electrostatic force from the space charge surrounding the dust particles. Particular attention is paid to the effect of plasma polarization around dust particles and the wake formation under the action of the external electric field.

Novel Synthesis Methods of New Imidazole-Containing Coordination Compounds Tc(IV, V, VII)-Reaction Mechanism, Xrd and Hirshfeld Surface Analysis.

In this work, we have proposed two new methods for the synthesis of [TcOL] (where L = imidazole (Im), methylimidazole (MeIm)) complexes using thiourea (Tu) and Sn(II) as the reducing agents. The main and by-products of the reactions were determined, and possible reaction mechanisms were proposed. We have shown that the reduction of Tc(VII) with thiourea is accompanied by the formation of the Tc(III) intermediate and further oxidation to Tc(V).

Effect of monoethanolamine salt-containing dicarboxylic acid and plant growth regulators on the absorption and accumulation of mercury.

In the modern world, mercury has become an extremely dangerous pollutant due to intensive human activity. Currently, sources of mercury are wastes from chemical industries, as well as mines, oil combustion products, and household waste. Phytoextraction of heavy metals from soil is considered one of the most promising and cost-effective technologies.

Secondary Role of Aliphatic and Heterocyclic Amines in the Formation of Low-Temperature Amine-Bearing U, Np, and Pu(VI) Chromates.

Uranyl compounds with tetrahedral oxoanions demonstrate a significant structural and topological diversity. Complexes of transuranium elements with such anions are not equally well-represented in the literature. To answer the question about the structural similarity in a series of An complexes with XO anions, we synthesized and studied 10 new U, Np, and Pu chromates with outer-sphere organic cations.

Physicochemical and Sorptive Properties of a Phosphorylated Mercerized Cotton Fabric.

A process of phosphorylation for a mercerized cotton kersey fabric was investigated. After wet oxidation, the phosphorus content in each sample was determined by spectrophotometric analysis. The range was 0.

New Complexes of Actinides with Monobromoacetate Ions: Synthesis and Structures.

Synthesis, FTIR spectral study, and X-ray diffraction analysis of single crystals of (CH)N[UO(mba)] (), (CH)N[NpO(mba)(NO)] (), (CH)N[PuO(mba)(NO)] (), and (CH)N[NpO(mba)(NO)] (), where mba is a monobromoacetate ion (CHBrCOO), were conducted. The main structural units of crystals - are mononuclear anionic complexes of the [AnO(mba)], [AnO(mba)(NO)], or [AnO(mba)(NO)] composition. All these complex units are characterized with the same crystal-chemical formula ( = AnO and = CHBrCOO or NO ).

A 70-Year-Old Mystery in Technetium Chemistry Explained by the New Technetium Polyoxometalate [H O ] [Tc O ] ⋅ 4H O.

[H O ] [Tc O ] ⋅ 4H O [1] was prepared from an aqueous Tc O solution concentrated over anhydrous H SO . [Tc O ] is the first polyanionic species to be reported for Tc. The unit cell contains one centrosymmetric [Tc O ] polyanion as well as hydronium ions and water molecules.

Plasma Parameters around a Chain-Like Structure of Dust Particles in an External Electric Field.

The formation of a 1D chain-like structure of dust particles in a low-temperature argon plasma was studied. A new numerical model for calculation of the self-consistent spatial distribution of plasma parameters around a chain of dust particles was presented. The model described the motion of positively charged ions in the electric potential of several negatively charged dust particles, taking into account the action of an external electric field.

Halogen bonding in uranyl and neptunyl trichloroacetates with alkali metals and improved crystal chemical formulae for coordination compounds.

The structures of the single crystals of compounds KUO(tca)(tcaH) (I), KNpO(tca)(tcaH)(HO) (II), RbUO(tca)(tcaH)(HO) (III), and CsUO(tca)(tcaH)·HO (IV), where tca is the trichloroacetate ion, were established by X-ray diffraction analysis. The crystals of II-IV have a framework structure, whereas in the layered crystals of I, neighboring layers are connected to each other via halogen bonds. In this regard, the crystals of I possess perfect cleavage along the (001) plane: the crystals are easily cut into stacks of very thin layers.

Neptunium(V) Isothiocyanate Complexes with 4'-Aryl-Substituted 2,2':6',2″-Terpyridines and ,-Dimethylacetamide as Molecular Ligands.

New complexes of neptunyl(V) isothiocyanate with 4'-aryl-substituted 2,2':6',2″-terpyridines (Terpy) and ,-dimethylacetamide (DMA) were obtained: [(NpO)(4'-Ph-Terpy)(DMA)(NCS)]·DMA, [(NpO)(4'-(4-(CF)CH)-Terpy)(DMA)(NCS)]·2HO·DMA, [(NpO)(4'-(3-BrCH)-Terpy)(DMA)(NCS)]·DMA, and [(NpO)(4'-(2-(COOH)CH)-Terpy)(DMA)(NCS)]·DMA. The structures of the compounds were determined with X-ray diffraction analysis. The neptunium coordination polyhedra were found to be pentagonal bipyramids with O atoms of the NpO groups in the apical positions and the equatorial planes formed by three N atoms of the terpyridine ligand, a N atom of the isothiocyanate anion, and an O atom of DMA.

Interaction with Simple Monopyridinecarboxylic Ligands Revealing Unexpected Structural Types of Uranyl Halides.

The inclusion of monopyridinecarboxylic acids into the structures of uranyl halides results in the formation of unexpected structural units. Molecules of picolinic and nicotinic acids acting as bridging ligands favor the formation of unprecedented dinuclear units in two uranyl bromide complexes, which comprise two metal centers in different, tetragonal- and pentagonal-bipyramidal, coordination geometries. Moreover, the different positions of the nitrogen atom in the molecule of nicotinic acid induce significant bending of the heterodimer.

Non-relaxor behaviour of low-frequency vibration spectra of relaxor ferroelectric PbCoNbO: evidences from Brillouin and Raman scattering measurements.

This paper presents the results of studies of a low-frequency vibration spectrum of PbCoNbO (PCN) relaxor ferroelectric crystal using the Brillouin and Raman light scattering in the temperature range from 80 to 750 K. The analysis of the temperature behaviour of the longitudinal acoustic phonon in Brillouin scattering spectra showed no anomalies in the vicinity of 'diffuse phase transition' (T = 250 K) in PCN. Polarized Raman light scattering spectra were obtained in PCN over the entire temperature range studied.

Perrhenate and Pertechnetate Complexes of U(IV), Np(IV), and Pu(IV) with Dimethyl Sulfoxide as an O-Donor Ligand.

A series of new dimethyl-sulfoxide-containing pertechnetates and perrhenates of tetravalent U, Np, and Pu were synthesized and structurally characterized by the X-ray diffractometry. In all the synthesized compounds, the actinide atoms were coordinated by eight DMSO molecules with or without an extra XO anion in the coordination sphere. This resulted in the square antiprismatic or capped square antiprismatic coordination of An atoms.

Urine S-Adenosylmethionine are Related to Degree of Renal Insufficiency in Patients with Chronic Kidney Disease.

Objective: To determine whether urine S-adenosylmethionine (SAM) might be an indicator of chronic kidney disease (CKD).

Methods: We investigated urine levels of SAM and related metabolites (S-adenosylhomocysteine and homocysteine cysteine) in 62 patients (average age, 65.9 years) with CKD (stages II-V).

Corner excitations in the 2D triangle-shaped topological insulator with chiral superconductivity on the triangular lattice.

The 2D triangle-shaped-symmetric topological insulator with the chiral superconducting coupling on the triangular lattice is investigated. While such a system cannot provide the topologically protected corner excitations, we report the presence of the nontopological corner excitations with energy value to lie in the first-order edge spectrum gap. Though these excitations are not topologically protected, they appear for a rather wide range of the parameters values and are robust against the boundary defects and weak disorder.

The edge states properties of the topological insulator with fermion path nonanalyticity points located at the edge.

The edge states properties of a finite-size 2D topological insulator (TI) with the open boundary conditions in both directions are studied. It is shown that fermion path nonanalyticity points appearing on the edge of finite-size TI cause a nonuniform edge state distribution along the TI edge. The character of this distribution depends substantially on the edge state's energy position in the bulk band gap.

[A new method of aponevrosis suturing after laparotomy in urgent abdominal surgery].

Objective: To improve the results of treatment of patients undergoing laparotomy by using of a new method of aponeurosis suturing after laparotomy.

Material And Methods: Training process for a new method of aponeurosis suturing after laparotomy was organized on the patented medical simulator for learning the technique of laparotomy closure. The method was introduced into surgical practice later.

Peculiarities of the Supramolecular Assembly of Tetraethylammonium and 3-Bromopropionate Ions in Uranyl, Neptunyl, and Plutonyl Coordination Compounds.

Synthesis and X-ray diffraction studies of {N(CH)}[AnO(CHBrCOO)] [An = U (), Np (), or Pu ()] and CHBrCOOH (), where CHBrCOO is an anion of the 3-bromopropionic acid, are reported. The isostructural coordination compounds - contain mononuclear anionic complexes [AnO(CHBrCOO)] belonging to the crystal chemical group AB (A = AnO; B = CHBrCOO). In the crystal structure of , the CHBrCOOH molecules are hydrogen bonded into centrosymmetric dimers R(8).

Determination of S-adenosylmethionine and S-adenosylhomocysteine in blood plasma by UPLC with fluorescence detection.

A validated approach to determine various methionine cycle metabolites (S-adenosylmethionine, S-adenosylhomocysteine, and methylthioadenosine) in human blood plasma is offered. The approach is based on solid-phase extraction (with grafted phenylboronic acid) and derivatization with chloroacetaldehyde followed by ultra-performance liquid chromatography with fluorescence detection. We used a 100 × 2.