[Results of the first All-Russian consensus conference on bariatric surgery].

Until now, there has not been organized consensus for standardization in bariatric surgery In Russia. We present the results of the first Bariatric Surgery Consensus Conference conducted in Barnaul (March, 2023). A list of questions was proposed within 6 blocks: 1) general issues of bariatric surgery, 2) sleeve gastrectomy, 3) one-anastomosis gastric bypass («mini-gastric bypass»), 4) Roux-en-Y Gastric Bypass, 5) Single Anastomosis Duodenal Switch and other options for biliopancreatic bypass, 6) rare procedures.

Methyl and Ethyl Ethers of Glycerol as Potential Green Low-Melting Technical Fluids.

The study is dedicated to the consideration of lower alkyl ethers of glycerol as potential components of low-melting technical fluids (e.g., heat transfer fluids, hydraulic fluids, aircraft de-icing fluids, etc.

[Experience of successful laparoscopic sleeve resection of the stomach and treatment of morbid obesity in a patient with a classic form of congenital adrenal dysfunction].

The article presents a clinical observation of a patient with congenital adrenal dysfunction (CHD), a salt-losing form of 21-hydroxylase enzyme deficiency (homozygous mutation I 172N), and also with morbid obesity, due to long-term use of high doses of glucocorticosteroids, who underwent bariatric surgery - laparoscopic sleeve resection of the stomach. A feature of the presented case is the elimination of one of the causes of decompensation of the disease, namely, overweight, as well as insulin resistance, which requires the intake of large doses of glucocorticoids, which in turn leads to a worsening of the course of obesity, thereby causing a vicious circle. 7 months after surgical treatment, the goal was achieved - a reduction in the dose of Prednisolone by 25%, with a decrease in body weight by 72.

Catalytic Design of Matrix-Isolated Ni-Polymer Composites for Methane Catalytic Decomposition.

Targeted synthesis of C/composite Ni-based material was carried out by the method of matrix isolation. The composite was formed with regard to the features of the reaction of catalytic decomposition of methane. The morphology and physicochemical properties of these materials have been characterized using a number of methods: elemental analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, temperature programmed reduction (TPR-H), specific surface areas (SSA), thermogravimetric analysis, and differential scanning calorimetry (TGA/DSC).

Mitigation of Physical Aging of Polymeric Membrane Materials for Gas Separation: A Review.

The first commercial hollow fiber and flat sheet gas separation membranes were produced in the late 1970s from the glassy polymers polysulfone and poly(vinyltrimethyl silane), respectively, and the first industrial application was hydrogen recovery from ammonia purge gas in the ammonia synthesis loop. Membranes based on glassy polymers (polysulfone, cellulose acetate, polyimides, substituted polycarbonate, and poly(phenylene oxide)) are currently used in various industrial processes, such as hydrogen purification, nitrogen production, and natural gas treatment. However, the glassy polymers are in a non-equilibrium state; therefore, these polymers undergo a process of physical aging, which is accompanied by the spontaneous reduction of free volume and gas permeability over time.

[Non-surgical treatment of staple-line suture leakage after redo sleeve gastrectomy].

Redo bariatric procedures are common. However, redo sleeve gastrectomy is not a frequent case of repeated bariatric surgery and can be performed rather as a necessary measure in difficult intraoperative conditions. We report a patient who underwent laparoscopic adjustable gastric band placement, its blockage and surgical removal, sleeve gastrectomy and redo sleeve gastrectomy.

In Situ-Generated, Dispersed Cu Catalysts for the Catalytic Hydrogenolysis of Glycerol.

The present study is dedicated to the experimental verification of a concept for the hydrogenolysis of glycerol over in situ-generated Cu dispersed particles (Cu-DP). The Cu-DP were generated by in situ reduction of a precursor salt (Cu(OAc), CuSO, CuCl) in the presence of KOH and were active in glycerol conversion under hydrogen (T = 200-220 °C, p(H) = 1-4 MPa), where 1,2-propylene glycol (PG) and lactic acid (LA) were detected to be the main products. The influence of the reaction conditions (temperature, hydrogen pressure, reaction time, catalyst-to-feed ratio and the KOH/Cu ratio) on the yields of the products is described.

Correction: Genotoxic effect of 2,2'-bis(bicyclo[2.2.1] heptane) on bacterial cells.

[This corrects the article DOI: 10.1371/journal.pone.

Genotoxic effect of 2,2'-bis(bicyclo[2.2.1] heptane) on bacterial cells.

The toxic effect of strained hydrocarbon 2,2'-bis (bicyclo[2.2.1]heptane) (BBH) was studied using whole-cell bacterial lux-biosensors based on Escherichia coli cells in which luciferase genes are transcriptionally fused with stress-inducible promoters.

Bio-Based Solvents and Gasoline Components From Renewable 2,3-Butanediol and 1,2-Propanediol: Synthesis and Characterization.

In this study approaches for chemical conversions of the renewable compounds 1,2-propanediol (1,2-PD) and 2,3-butanediol (2,3-BD) that yield the corresponding cyclic ketals and glycol ethers have been investigated experimentally. The characterization of the obtained products as potential green solvents and gasoline components is discussed. Cyclic ketals have been obtained by the direct reaction of the diols with lower aliphatic ketones (1,2-PD + acetone → 2,2,4-trimethyl-1,3-dioxolane (TMD) and 2,3-BD + butanone-2 → 2-ethyl-2,4,5-trimethyl-1,3-dioxolane (ETMD)), for which the Δ, Δ and Δ values have been estimated experimentally.

[Chemotaxis as a Mechanism of Locomotor Activity of Olfactory Cilia].

The article is devoted to a modern understanding of locomotor activity of olfactory cilia as a form of chemotaxis. It includes an analysis of published data and also the results of experimental research performed by the authors.

[Influence of transcranial electromagnetic brain stimulation on development of conditioned reflex in rats].

The influence of transcranial electromagnetic stimulation on the development of an active avoidance reflex with painful reinforcement in laboratory rats is investigated. It is shown, that an exposure of the rats' brain to electromagnetic radiation in the millimeter range ((λ = 5,6 and 7,1 mm), modulated as a series of low-frequency pulses, leads to a suppression of the development of the conditioned avoidance reflex occurred in 50% of cases. In other 25% of cases irradiation leads to inhibition of reflex development.

[Fluorescence of mitochondrial respiration chain components in medical diagnostics].

The intrinsic fluorescence of reduced nicotinamide adenine dinucleotide (NADH) and oxidized flavoproteins in animals and humans in the norm and in the development of pathological processes was studied. The results of the use of a fluorescent analysis in cancer diagnosis are represented.

[Respiratory and olfactory cilia molecular machines of locomotor apparatus].

Physical activity of respiratory and olfactory cilia of animals and humans in the context of L.A. Blumenfeld concept, according to which protein molecules are "machines that perform chemical transformation" and create "a meaningful order", has been investigated and analyzed.

[The wavelet-analysis of non-stationary heart rate variability during out head-up tilt test].

Heart rate variability (HRV) during the head-up tilt test (HUT) was investigated using an automated set of dynamic positioning in the gravitational field. The theory of wavelets is applied to find the dynamics of changes in the spectral properties of rhythmogran during the transitional phases of HUT. Quantitative parameters (spectral integrals, instantaneous maximal frequencies, nonstationarity factors), that describe transitive stages of such non-stationary head-up tilt test, are calculated.

Search for the Θ+ pentaquark via the π(-)p→K(-)X reaction at 1.92 GeV/c.

The Θ(+) pentaquark baryon was searched for via the π(-)p→K(-)X reaction with a missing mass resolution of 1.4 MeV/c(2) (FWHM) at the Japan Proton Accelerator Research Complex (J-PARC). π(-) meson beams were incident on the liquid hydrogen target with a beam momentum of 1.

Effective viscosity of confined hydrocarbons.

We present molecular dynamics friction calculations for confined hydrocarbon films with molecular lengths from 20 to 1400 carbon atoms. We find that the logarithm of the effective viscosity η(eff) for nanometer-thin films depends linearly on the logarithm of the shear rate: log η(eff)=C-nlog ̇γ, where n varies from 1 (solidlike friction) at very low temperatures to 0 (Newtonian liquid) at very high temperatures, following an inverse sigmoidal curve. Only the shortest chain molecules melt, whereas the longer ones only show a softening in the studied temperature interval 0 View Article and Find Full Text PDF

[Effect of carcinogenic nitrogen-containing compounds on cell metabolism].

The brown frog (Rana temporaria) skin cells respiration, calcium metabolism and glycolysis, the tree frog (Hyla arborea) skin cells respiration and calcium metabolism were studied under short-term (first hours) and long-term (first days) exposure to nitrogenous compounds [N-nitroso-N-methyl urea (NMU) and thiourea (TU)]. The first direct effect of nitrogenous compounds exposure was cell breathing inhibition occurring in Rana temporaria skin cells after 28 days of exposure, and in Hyla arborea skin cells after 8 days of exposure. These changes were precided by decrease of lactate dehydrogenase (LDH) activity in Rana temporaria skin cells starting 16 days after NMU and TU introduction.

[Unbiased criteria for estimation of the transition from unordered to ordered motor activity of the olfactory cilia].

Unbiased criteria (Lissajous figures, entropy, and harmonic spectra) have been developed to estimate the transition from an unordered to an ordered motor activity of olfactory cilia, which occurs by the action of odorants on flagellata.

Velocity dependence of friction of confined hydrocarbons.

We present molecular dynamics friction calculations for confined hydrocarbon "polymer" solids with molecular lengths from 20 to 1400 carbon atoms. Two cases are considered: (a) polymer sliding against a hard substrate and (b) polymer sliding on polymer. We discuss the velocity dependence of the frictional shear stress for both cases.

[Mechanisms of social behavior of the vertebrate tissue cells: cultural models].

Morphogenetic interactions between cells in the organism are largely reproduced in the cell cultures of various types, in particular, in that of the epitheliocytes and fibroblasts. The cultured cells interact by means of receptors and ligands, which activate intracellular signal systems. Three microenvironment components (liquid medium, extracellular matrix, and intercellular contacts) play the role of such ligands.

Frictional properties of confined polymers.

We present molecular dynamics friction calculations for confined hydrocarbon solids with molecular lengths from 20 to 1400 carbon atoms. Two cases are considered: a) polymer sliding against a hard substrate, and b) polymer sliding on polymer. In the first setup the shear stresses are relatively independent of molecular length.

[Two molecular motility systems of the frog olfactory cilia].

The motility of olfactory cilia of frog (Rana temporaria) was studied by vital video microscopy under an exposure to odorants: pentanol, camphor, cineole, vanillin (first group), ammonia, and hydrogen sulfide (second group) as well as inhibitors of cell respiration (rotenone and malonate). It was shown that olfactory cilia have both a dynein-tubulin and an actin-myosin molecular motility system. The first molecular motility system provides unordered movements and the second, ordered movements.