Numerical study of the mechanisms of nano-assisted foam flooding in porous media as an alternative to gas flooding.

Oil reservoirs are nearing maturation, necessitating novel enhanced oil recovery (EOR) techniques to meet escalating global energy demands. This demand has spurred interest in reservoir production analysis and forecasting tools to enhance economic and technical efficiency. Accurate validation of these tools, known as simulators, using laboratory or field data is pivotal for precise reservoir productivity estimation.

Review of modern models of porous media for numerical simulation of fluid flows.

The current models of porous media for numerical simulation of multiphase fluid flows are reviewed and classified herein. Methods for building these models and problems of creating the same are examined, and examples where the models were used are given. This review has been made as part of hydrocarbon deposit hydrodynamic simulation problems arising in the oil-and-gas producing industry.

Clinical application of mesenchymal stem cell in regenerative medicine: a narrative review.

The multipotency property of mesenchymal stem cells (MSCs) has attained worldwide consideration because of their immense potential for immunomodulation and their therapeutic function in tissue regeneration. MSCs can migrate to tissue injury areas to contribute to immune modulation, secrete anti-inflammatory cytokines and hide themselves from the immune system. Certainly, various investigations have revealed anti-inflammatory, anti-aging, reconstruction, and wound healing potentials of MSCs in many in vitro and in vivo models.

Approaches for the complex assessment of polychemical pollution of permafrost-affected soils and the upper layer of permafrost.

The analysis of about 200 samples taken from 42 permafrost-affected soil profiles was carried out on four key sites in different regions of cryolithozone (West Siberia, Central, North, and North-East Yakutia) characterized by different active layer depths and soil lithology. The aim of the study was to determine the influence of different processes of cryogenic mass-exchange on the redistribution and accumulation of major pollutants such as petroleum products, acid-soluble forms of trace elements, polycyclic hydrocarbons, and technogenic radionuclides transferred via atmospheric transport or after the local anthropogenic impact in different soil horizons of Cryosols and in the upper layers of permafrost. Samples were analyzed using modern precise techniques (direct γ-spectrometric measurements with Ge(Li) and NaI(Tl) detectors; fluorometric method; reversed-phase high-performance liquid chromatography; spectrofluorimetric detection; atomic absorption spectrometry with flame atomization).

The emerging role of microbiota-derived short-chain fatty acids in immunometabolism.

The accumulating evidence revealed that microbiota plays a significant function in training, function, and the induction of host immunity. Once this interaction (immune system-microbiota) works correctly, it enables the production of protective responses against pathogens and keeps the regulatory pathways essential for maintaining tolerance to innocent antigens. This concept of immunity and metabolic activity redefines the realm of immunometabolism, paving the way for innovative therapeutic interventions to modulate immune cells through immune metabolic alterations.

Photothermocapillary Method for the Nondestructive Testing of Solid Materials and Thin Coatings.

The photothermocapillary (PTC) effect is a deformation of the free surface of a thin liquid layer on a solid material that is caused by the dependence of the coefficient of surface tension on temperature. The PTC effect is highly sensitive to variations in the thermal conductivity of solids, and this is the basis for PTC techniques in the non-destructive testing of solid non-porous materials. These techniques analyze thermal conductivity and detect subsurface defects, evaluate the thickness of thin varnish-and-paint coatings (VPC), and detect air-filled voids between coatings and metal substrates.

CAR-NK Cell: A New Paradigm in Tumor Immunotherapy.

The tumor microenvironment (TME) is greatly multifaceted and immune escape is an imperative attribute of tumors fostering tumor progression and metastasis. Based on reports, the restricted achievement attained by T cell immunotherapy reflects the prominence of emerging other innovative immunotherapeutics, in particular, natural killer (NK) cells-based treatments. Human NK cells act as the foremost innate immune effector cells against tumors and are vastly heterogeneous in the TME.

[Prevalence of ischemic heart disease depending on factors of psychoemotional stress among men of mature age (epidemiological study)].

Aim: To establish associations of the prevalence of ischemic heart disease (IHD) and factors of psychoemotional stress in men of the open urban population in the age group 4564 years after two decades of life.

Materials And Methods: A cross-sectional epidemiological study using a model of the city of Tyumen was conducted on a representative sample of the population among males of mature age (4564 years). Based on standard epidemiological methods, IHD was established according to strict epidemiological criteria definite IHD.

CAR T cells in solid tumors: challenges and opportunities.

Background: CARs are simulated receptors containing an extracellular single-chain variable fragment (scFv), a transmembrane domain, as well as an intracellular region of immunoreceptor tyrosine-based activation motifs (ITAMs) in association with a co-stimulatory signal.

Main Body: Chimeric antigen receptor (CAR) T cells are genetically engineered T cells to express a receptor for the recognition of the particular surface marker that has given rise to advances in the treatment of blood disorders. The CAR T cells obtain supra-physiological properties and conduct as "living drugs" presenting both immediate and steady effects after expression in T cells surface.

Examination of Statistical Instability of Electroencephalograms.

The study examined stochastic stability of EEG samples recorded in succession from the same healthy volunteer at unchanged state. The absence of statistical repetitions not only for EEG samples, but also for the corresponding spectral densities was proven. A method to calculate the pairwise comparison matrices of ECG samples and quasi-attractors was proposed.

New Effect in Physiology of Human Nervous Muscle System.

A new phenomenon (or paradox) consisting in higher statistical stability of samples, for example, tremorograms, in a group of different subjects than in the same subject in unchanged homeostasis. At the same time, it turns out that 15 different subjects are more similar (statistically) to each other than one person to himself in 15 repetitions of tremorogram recording (in unchanged homeostasis). This poses serious problems for physiology and medicine, and in the context of transition to individualized medicine, this raises the question of how different people can be compared if they are statistically more similar than one person to himself.

Levels, sources, and toxicity assessment of polycyclic aromatic hydrocarbons in urban topsoils of an intensively developing Western Siberian city.

This study investigates the levels, sources, spatial distribution, and toxicity of polycyclic aromatic hydrocarbons (PAHs) in urban soils of Tyumen, Russia. Observations of PAHs in cities of Western Siberia accomplished by a representative set of samples are very rare, even though it is one of the most urbanized parts of Russia. Therefore, it is important to estimate the status of PAHs in soils of urban environments representing vast Siberian regions.

Levels of depression and life exhaustion in the open population of the middle urbanized Siberian city: gender differences.

Aim: The aim of the study was to determine the levels of depression and life exhaustion in men and women of the open urban population in the age range.

Materials And Methods: A single-stage epidemiological study was conducted among people of both sexes aged 25-64 in Tyumen. A representative sample was formed from the electoral lists of citizens by the method of "random numbers" - 2000 men and women with a response among men 85.

Urban soil geochemistry of an intensively developing Siberian city: A case study of Tyumen, Russia.

Complex studies of soil cover within the urbanized areas represent one of the main research directions in environmental geochemistry. Urban soil geochemistry depends on a combination of natural and urbanization factors unique to each urban environment. Although Tyumen, in Western Siberia, is an intensively developing urban city, a detailed geochemical survey of its soils has never been performed.

Stress in the family - association with prevalence of cardiovascular diseases in men of the open city population.

Aim: The aim of the study was to establish associations of the prevalence of coronary artery disease (CAD), metabolic syndrome (MS) and arterial hypertension (AH) with family stress in open male population of Tyumen aged 25-64 years.

Materials And Methods: Cross-sectional epidemiological survey was conducted on representative sample of 1000 individuals (250 in every 4 decades: 25-34, 35-44, 45-54, 55-64 years) formed from the election list of males in one of the administrative districts of Tyumen. The response to cardiac screening was 85.

Proton disorder and elasticity of hexagonal ice and gas hydrates.

This work is devoted to the study of the mechanical properties of hexagonal ice Ih and gas hydrate frameworks sI, sII and sH, taking into account the disorder in the positions of the hydrogen atoms (protons). The article emphasizes the critical role of the elastic energy for the evaluation of the relative energy of the proton configurations. The calculations are performed with the help of the TINKER package using the AMOEBA polarizable force field.

Wavelength dispersive X-ray fluorescence determination of major oxides in bottom and peat sediments for paleoclimatic studies.

The wavelength dispersive X-ray fluorescence method was applied to identify the distribution of major oxides within bottom and peat sediments containing organic matter of up to 70 wt.%. Samples were prepared as glass beads by fusing with lithium metaborate.

Data on accessibility of corporate information and business transparency in Russia.

Empirically based, the data description covers business transparency in Russia and availability of corporate information for interested parties. Entry barriers in the form of a fee for hard copies of documents are perceptible as an important indicator of business publicity. The study made it possible to summarize current data on 5070 Russian enterprises in order to estimate document copying cost differentiation according to the developed model.

Experimental Analysis of the Chaotic Dynamics of Muscle Biopotentials under Various Static Loads.

Arbitrary and involuntary movements were studied from the position of the new chaos-self-organization theory. Analysis of organization of tappingrams and tremorograms within the framework of N. A.

The substantiation of the elastic-viscoplastic model of the human spine for modeling the correction process of kyphoscoliotic deformation.

Purpose: The relevance of the problem is caused by an increase in the number of spine-related diseases among children, including scoliosis. Currently, there are no methodologies for the treatment of scoliosis, which ensure an unambiguous positive result. The purpose of the article is to justify the spinal model as an elastic viscoplastic body for further mathematical modeling of the process of spine correction and search for its optimal conditions.

Reparation and Immunomodulating Properties of Bacillus sp. Metabolites from Permafrost.

An ointment containing metabolites of Bacillus sp. microorganisms isolated from permafrost samples was applied onto the skin wound of BALB/c mice. Metabolites isolated during culturing of Bacillus sp.

[Associations between high levels of hostility and coronary heart disease in an open urban population among 25-64-year-old men].

Aim: To establish the associations of the prevalence of coronary heart disease (CHD) with high levels of hostility in the open population of 25-64-year-old men in an average urbanized Siberian town.

Subjects And Methods: A cross-sectional epidemiological survey was conducted in a representative sample of the electorate of a Tyumen administrative district among 1000 males, with 250 being in each of 4 life decades (25-34, 35-44, 45-54, and 55-64 years). There were 850 (85%) responses.

Classification of hydrogen bond flips in small water polyhedra applied to concerted proton tunneling.

Recently a new mechanism of proton tunneling in a prism-like water hexamer was revealed [Richardson et al., Science, 2016, 351, 1310]. The tunneling motion involves the concerted breaking of two hydrogen bonds and rotations of two nearest water molecules.

Improving the environmental and performance characteristics of vehicles by introducing the surfactant additive into gasoline.

The operation of modern vehicles requires the introduction of package of fuel additives to ensure the required level of operating characteristics, some of which cannot be achieved by current oil refining methods. The use of additives allows flexibility of impact on the properties of the fuel at minimal cost, increasing the efficiency and environmental safety of vehicles. Among the wide assortment of additives available on the world market, many are surfactants.