759 Result(s)
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Article
Methods of controlled radical polymerization in the synthesis of functional polymers and macromolecular structures
In a brief review, the main trends in the modern development of the concept of controlled radical polymerization were considered and illustrated by specific examples. The prospects for applying the methodology...
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Article
Open AccessA structural basis for prion strain diversity
Recent cryogenic electron microscopy (cryo-EM) studies of infectious, ex vivo, prion fibrils from hamster 263K and mouse RML prion strains revealed a similar, parallel in-register intermolecular β-sheet (PIRIB...
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Article
Mixed Ligand Zinc Complexation with Ornithine and Histidine in Aqueous Solution
The formation of mixed-ligand complexes of various compositions in the Zn–L-histidine (His)–L-ornithine (Orn) system has been studied by pH-metry, calorimetry, and NMR spectroscopy. The thermodynamic parameter...
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Chapter and Conference Paper
Milling a Titanium Alloy Using Different Machining Parameters: A Comparative Study on Tool Wear, Tool Life and Performance
The machining process is still quite relevant in the manufacturing industry, being employed in the production of high-precision and quality parts for a wide variety of industries, for instance, the aerospace a...
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Article
Phase Equilibria in Sections of the Calcium-Nitrate–Glycerol–Water System at Temperatures from 0 to –47°C
Phase equilibria in sections of the calcium-nitrate–glycerol–water system at temperatures from 0 to –47°C are studied by visual polythermal analysis. The ratio of calcium nitrate and glycerol in the sections v...
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Article
Phase Equilibria in Sections of the Potassium Formate–Ethylene Glycol–Water System at Temperatures from 0 to –59°C
Phase equilibria in sections of the potassium-formate–ethylene-glycol–water system at temperatures from 0 to –59°C with a potassium-formate–ethylene-glycol mass ratio from 3 : 1 to 1 : 3 are studied. A number ...
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Article
Phase Equilibria in Sections of the Urea–Ethylene Glycol–Water System at Low Temperatures
Phase equilibria in sections of the urea–ethylene glycol–water system were studied by visual polythermal analysis at temperatures of 0 to –66°C. The urea-to-ethylene glycol ratio in the sections was varied fro...
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Article
Phase Equilibria in Sections of the Potassium Acetate–Ethylene Glycol–Water System at Temperatures from 0 to –66°C
Phase equilibria in sections of the potassium acetate–ethylene glycol–water system at temperatures from 0 to –66°C were studied by the visual-polythermal method. The potassium acetate to ethylene glycol ratio ...
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Article
Investigation of Phase Equilibria in the Potassium Formate–Glycerol–Water System at Low Temperatures
Phase equilibria in sections of the potassium formate–glycerol–water system were studied by visual polythermal analysis at temperatures of 0 to –60°C. The potassium formate-to-glycerol ratio in the sections wa...
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Article
Nitrones and Nitroso Compounds in the Coupling Reactions for the Synthesis of Macromolecular Structures Based on Polystyrene
The capacity of the coupling reactions of polystyrene bearing an ω-terminal bromine group in the presence of various nitrones and nitroso compounds has been disclosed. As exemplified by the coupling using С-pheny...
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Article
Clindamycin-loaded nanofibers of polylactic acid, elastin and gelatin for use in tissue engineering
In the present work, polylactic acid (PLA), elastin and gelatin fibers, containing clindamycin, were prepared to test their potential application as wound dressings. They underwent release studies to determine...
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Article
Study the flow and species distribution characteristics in a typical 25-cell proton ceramic fuel cell stack by 3D large-scale modeling
Protonic ceramic fuel cell (PCFC) has attracted more and more research attention due to its special working features, compared with both the traditional oxygen ionic solid oxide fuel cell (O2−-SOFC) and protonic ...
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Article
A Novel Method for the Polarographic Determination of Trace Nitrite in Water
A method for polarographic determination of nitrites in water is developed. Nitrites firstly react with resorcinol, then the nitroso product reacts with nickel ion to form a complex, which can be reduced on dr...
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Article
Synthesis of 5-Arylisoxazole and 4,5-Dichloroisothiazole Amino-Substituted Derivatives and Their Biological Activity
A series of amino derivatives of 5-arylisoxazoles and 4,5-dichloroisothiazole with primary and secondary amino groups was synthesized. 3-Aminomethyl-5-arylisoxazol-3-ylmethanamines were obtained on the basis o...
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Article
Model of the Workflow of a Bladder Tank Diaphragm Foam Mixer and a Method for Calculating the Two Diaphragm Diameters
The workflow of a bladder tank foam mixer is investigated. A physical and mathematical model of the workflow based on the Bernoulli and continuity equations with the use of empirical dependences of the hydraul...
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Article
Synthesis and Study of Thermophysical Properties of Polystyrenes Prepared in the Presence of Conjugated α-Dinitrones Based on Glyoxal
A one-step convergent method was proposed for the synthesis of branched macromolecules in the presence of conjugated dinitrones (N,N-dimethylglyoxal dinitrone, N,N-di-tert-butylglyoxal dinitrone, and N,N- dipheny...
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Article
Thermodynamics of the Formation of Mixed Complexes of Nickel(II) Ions with Histidine and Diamines in an Aqueous Solution
Calorimetry, spectrophotometry, and pH measurements are used to study the formation of mixed ligand complexes with 1,10-phenanthroline (Phen) and ethylenediamine (En) in Ni(II)–His–Phen(En) systems. The format...
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Article
Thermodynamics of Mixed-Ligand Nickel(II) Complex Formation with Ornithine and Histidine in Aqueous Solutions
The formation of various mixed-ligand complexes in the Ni(II)–L-histidine (His)–L-ornithine (Orn) system was studied by potentiometric titration, calorimetry, and spectrophotometry. The thermodynamic parameter...
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Article
Structural and hydrodynamic characteristics of polystyrene synthesized in the presence of conjugated dinitrones
A series of branched high-molecular-weight alkoxyamines (HAAs) based on polystyrene of different molecular weight were synthesized using nitroxide radicals generated in situ in the presence of conjugated dinitron...
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Article
Synthesis of hybrid compounds by benzylation of acylhydrazones with 3,5-di-tert-butyl-4-hydroxybenzyl acetate
N-Benzylation of acylhydrazones of the hydroxybenzaldehyde series with 3,5-di-tert-butyl-4-hydroxybenzyl acetate was performed at room temperature in the absence of acid or base catalysts. Carboxamides do not rea...
