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Russia [3] Tomsk Polytechnic University... Publications | LitMetric

1,416 results match your criteria: "Russia [3] Tomsk Polytechnic University[Affiliation]"

Growing interest in cancer radiotherapy has led to the application of nanoparticles as radiosensitizers. Here, we, for the first time, present the results of the radiosensitizing properties of silver nanoparticles (AgNPs) (possessing low toxicity towards human body) against cancer cells under neutron irradiation. Five standard cancer cultures (including glioblastoma, known for its resistance to conventional photon radiation) were used to evaluate the radiosensitizing properties of AgNPs suing MTT test, flow cytometry, and optical fluorescence microscopy.

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Although bursting bubbles are widely encountered in nature and in engineering applications, the flow physics behind the bursting process and interfacial flow remain incomplete in complex fluids. In this work, we investigate the dynamics of bubble bursting in an elastoviscoplastic (EVP) polymer matrix by three-dimensional direct numerical simulations. The volume-of-fluid method coupled with a local adaptive mesh refinement technique is adopted to capture the gas-liquid interface, and the Saramito model is employed to describe the EVP rheology of realistic polymer fluids.

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Exploration of Regulation of Alcohol Dehydrogenation Reaction of Dibenzimidazole-Based Ruthenium Complexes.

Molecules

February 2025

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.

This work demonstrates the synthesis of a series of Ru(II) complexes with dibenzimidazole-based ligands and investigates the spatial relationship between ligand structure and complexes. It explores the effect of substituent changes on the N-Ru-N bond angle of the complexes, as well as the distance from the Ru center to the aryl group, and utilizes these complexes to catalyze benzyl alcohol dehydrogenation in toluene. It was found that the ligand [Ru]-complex with a spatial configuration of electron donating groups had a larger N-Ru-N bond angle and higher catalytic performance at the ruthenium center, with a yield of 91.

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Two-dimensional iodine-based materials, characterized by unique structures and properties, hold immense potential in electronics. Here, research indicates that doping metal/nonmetal dopants with small atomic numbers can substantially improve the equilibrium electronic transport of the new-type 2D iodine-based device. Unlike metal dopants, such enhancement from nonmetallic dopants varies greatly among elements, including sites.

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There is currently a demand for anti-adhesive materials that are capable of preventing the formation of intra-abdominal adhesions. In this study, electrospun poly(lactide-co-glycolide) scaffolds were dip-coated in aqueous solutions of polyvinyl alcohol with concentrations of 3 wt.%, 6 wt.

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Fusarium wilt is a devastating disease that affects banana crops worldwide. In Ecuador, bananas are one of the most important commodities and staple food. Nanoparticles are emerging as innovative solutions to control fungal diseases in plant protection.

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Bone injuries remain a significant challenge, driving the development of new materials and technologies to enhance healing. This study presents a novel approach for incorporating graphene into calcium phosphate (CaP) coatings on titanium alloy (Ti) substrates, with the aim of creating a new generation of materials for bone implant electronics. The stability of the composite coating under physiological conditions, long-term electrical and mechanical durability, and biocompatibility were systematically investigated.

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Upper Limit on the Photoproduction Cross Section of the Spin-Exotic π_{1}(1600).

Phys Rev Lett

December 2024

Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.

The spin-exotic hybrid meson π_{1}(1600) is predicted to have a large decay rate to the ωππ final state. Using 76.6  pb^{-1} of data collected with the GlueX detector, we measure the cross sections for the reactions γp→ωπ^{+}π^{-}p, γp→ωπ^{0}π^{0}p, and γp→ωπ^{-}π^{0}Δ^{++} in the range E_{γ}=8-10  GeV.

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Hybrid Nanofibrous Membrane with Durable Electret for Anti-Wetting Air Filtration.

Macromol Rapid Commun

January 2025

Innovation Center for Textile Science and Technology, College of Textiles, Donghua University, Shanghai, 201620, China.

Electrospun fibrous materials with fine fibers and small pores are fundamental for particulate matter (PM) filtration, addressing its harmful environmental and health impacts. However, the existing electrospun fibers are still limited to their sub-micron diameters and unstable surface electrostatic effect, leading to deteriorated filtration performance after prolonged storage or wetting. Herein, the study creates nanofibrous membranes with long-time stable electrostatics by electret-enhanced electrospinning.

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Laser reduction of graphene oxide (GO) is a promising approach for achieving flexible, robust, and electrically conductive graphene/polymer composites. Resulting composite materials show significant technological potential for energy storage, sensing, and bioelectronics. However, in the case of insulating polymers, the properties of electrodes show severely limited performance.

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A new method for the precise semiempirical determination of the basic parameters (structural parameters and parameters of the intramolecular potential energy surface, PES) of a molecule on the basis of highly accurate experimental data from the microwave and submillimeter-wave regions is suggested. The options and advantages of this method in comparison with the other methods of molecular PES determination are discussed using a diatomic molecule as an appropriate illustration. The HCl molecule is exploited as a suitable example.

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The use of radiopharmaceuticals for diagnostics in oncology allows for the detection of the disease at an early stage. Among diagnostic radionuclides, Tc is a promising isotope that has been used to create several drugs for clinical use. One of the most effective Tc chelators is 6-hydrazinylnicotinic acid (HYNIC), which, when combined with various vector molecules, can be used for targeted delivery of radionuclides to tumor tissues.

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Electrospun poly(ε-caprolactone) (PCL)-based scaffolds are widely used in tissue engineering. However, low cell adhesion remains the key drawback of PCL scaffolds. It is well known that nitrogen-doped diamond-like carbon (N-DLC) coatings deposited on the surface of various implants are able to enhance their biocompatibility and functional properties.

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Apremilast Cocrystals with Phenolic Coformers.

Molecules

December 2024

Department of Solid State Chemistry, University of Chemistry and Technology, Prague, Technicka 5, 16628 Prague, Czech Republic.

Apremilast (APR) is an anti-inflammatory drug commonly used in the treatment of psoriasis. In efforts to enhance its solubility, several cocrystals with similar structural features have been developed. This study investigates the cocrystallization of APR with four phenolic-type coformers: phenol, catechol, pyrogallol, and hydroxyquinol.

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Protective Effect of Silver Nanoparticles Against Cytosine Arabinoside Genotoxicity: An In Vivo Micronucleus Assay.

Int J Environ Res Public Health

December 2024

Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada 22860, Baja California, Mexico.

Cancer treatments have harmful side effects, including genotoxic ones. Our previous research discovered that a specific silver nanoparticle (AgNPs) formulation could reduce the genotoxic effects of an alkylating agent, cyclophosphamide. This study aims to evaluate if this protective effect is observed against an antimetabolite anticancer agent, cytosine arabinoside (Ara-C).

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Stanislav Iosofatovich Zalesky - the first head of the Department of General Medical Chemistry of the Imperial Tomsk University (currently the Department of Chemistry of the Siberian State Medical University), a versatile scientist and public figure, acknowledged expert in medical, chemical, hydrogeological and balneological sciences. Professor S.I.

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Article Synopsis
  • The study examined how the toxic compound 2.6-di(propan-2-yl)phenol distributes in warm-blooded rats after fatal poisoning through ingestion.
  • The research involved administering a high dose of the compound to Wistar male rats, followed by various extraction and identification techniques to analyze its presence in different body tissues and fluids after death.
  • Results indicated that the highest concentration of the compound was found in the stomach contents, tissues, heart, and spleen, demonstrating where the substance accumulates in cases of poisoning.
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Influenza is a disease of significant morbidity and mortality. The number of anti-influenza drugs is small; many of them stimulate the appearance of resistant strains. This article presents the results of assessing the antiviral activity of 1,2,3-triazole-containing derivatives of alkaloid lupinine for their ability to suppress the reproduction of orthomyxoviruses (influenza viruses: A/Vladivostok/2/09 (H1N1) and A/Almaty/8/98 (H3N2)).

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Nanobiotechnology for efficient plum pox virus elimination from apricot plants.

Plant Sci

March 2025

Group of Fruit Tree Biotechnology, Department of Plant Breeding, CEBAS-CSIC, Campus de Espinardo, Edif. 25, Murcia 30100, Spain. Electronic address:

Metallic nanoparticles have antimicrobial, virucidal, and anticancer activities and have been widely applied in medicine. In plants, silver nanoparticles have been used as preventive treatments in the greenhouse to reduce viral titers and symptoms. This work investigates the effect of Argovit™ AgNP formulation on apricot plants infected with Plum pox virus or with Hop stunt viroid.

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Article Synopsis
  • The study focuses on creating new fluorosulfate derivatives of 1,4-naphthoquinone through the SuFEx reaction and evaluates their anticancer effects on various cancer cell lines, showing they are more cytotoxic than Cisplatin.
  • The electronic structures of these compounds were analyzed using Density Functional Theory (DFT) to understand their cytotoxic properties.
  • A method using an impregnated graphite electrode (IMGE) was developed for detecting these compounds, and their electrochemical behavior was examined using cyclic voltammetry.
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Covalent organic frameworks (COFs) constitute an evolving class of permanently porous and ordered materials, and they have recently attracted increased interest due to their intriguing morphological features and numerous applications in gas storage, adsorption, and catalysis. However, their low aqueous stabilities and tedious syntheses generally hamper their use in heterogeneous catalysis. Nonetheless, a capable and water-stable heterogeneous catalytic system for coupling CO/epoxides to generate industrially important cyclic carbonates is still of great interest.

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Graphene oxide (GO) possesses specific properties that are revolutionizing materials science, with applications extending from flexible electronics to advanced nanotechnology. A key method for harnessing GO's potential is its laser-induced reduction, yet the exact mechanisms - photothermal versus photochemical effects - remain unclear. Herein, we discover the dominant role of photochemical reactions in the laser reduction of GO under visible light, challenging the prevailing assumption that photothermal effects are dominant.

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Non-immunoglobulin-based scaffold proteins (SPs) represent one of the key therapeutic target-specific and high-affinity binders in modern medicine. Among their cellular targets are signaling receptors, in particular, receptor tyrosine kinases, whose dysfunction leads to the development of cancer and other serious diseases. Successful applications of SPs have been reported for HER receptor type 2 (HER2), a member of the human epidermal growth factor receptor family that regulates cell growth and differentiation.

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We studied the radical-binding and antioxidant activities of the alkaloid tryptanthrin (TR) and its new synthetic derivative tryptanthrin oxime (TR-Ox), as well as the cytoprotective activity of TR-Ox under conditions of oxidative stress. The antiradical activity of TR-Ox was revealed in the test of binding with stable chromogen radical 2,2-diphenyl-1-picrylhydrazyl and in the superoxide radical generation test (riboflavin photoreduction reaction with detection by NBT reduction). TR-Ox was inferior to ionol and dihydroquercetin by the antiradical activity.

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Access to Carbonyl Azides via Iodine(III)-Mediated Cross-Coupling.

Org Lett

November 2024

School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China.

Herein, we present a prominent metal-free C-N cross-coupling platform that enables access to carbamoyl- and ketoazides from isocyanides or silyl enol ethers and trimethylsilyl azide (TMSN) with an aid of iodine(III) promoter. This offers a rapid route to a diverse set of synthetically valuable azide decorated fragments with excellent substrate scope and good to excellent yields. The disclosed platform exemplifies the use of TMSN for incorporation of the azide fragment without the loss of N.

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