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Volodymyr I. Kovalchuk

Researcher at National Academy of Sciences of Ukraine

Publications -  105
Citations -  2265

Volodymyr I. Kovalchuk is an academic researcher from National Academy of Sciences of Ukraine. The author has contributed to research in topics: Adsorption & Drop (liquid). The author has an hindex of 24, co-authored 99 publications receiving 1967 citations. Previous affiliations of Volodymyr I. Kovalchuk include Max Planck Society.

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Interfacial dilational rheology by oscillating bubble/drop methods

TL;DR: In this article, the authors focus on oscillating drop/bubble methodologies where harmonic variations of the interfacial area are utilized for the measurement of the dilational viscoelasticity in the frequency domain.
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Thermodynamics, adsorption kinetics and rheology of mixed protein-surfactant interfacial layers.

TL;DR: Based on experimental studies with milk proteins mixed with non-ionic and ionic surfactants at the water/air and water/hexane interfaces, the potential of the theoretical tools is demonstrated and it is shown that the formation of mixed adsorption layer is based on a modification of the protein molecules via electrostatic (ionic) and/or hydrophobic interactions by the surfactant molecules and a competitive Adsorption of the resulting complexes with the free, unbound surfactan.
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Models of two-dimensional solution assuming the internal compressibility of adsorbed molecules: A comparative analysis

TL;DR: In this paper, Fainerman et al. discussed the relationship between surface dilational rheology data and the corresponding limiting dilational elasticity, showing that the experimental elasticities in the high-frequency limit show an increase with concentration followed by a plateau or flat maximum.
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Surface dilational rheology of mixed adsorption layers at liquid interfaces

TL;DR: Models by Jiang et al., Joos, and by Lucassen and van den Tempel are compared here and applied to experimental data and represent a very good scientific background for studies of the mechanical behaviour of mixed adsorption layers.
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Surface-pressure isotherms of monolayers formed by microsize and nanosize particles.

TL;DR: In this paper, the surface pressure isotherms of particle monolayers for a wide range of particles sizes (between 75 μm and 7.5 nm) are described by the theoretical model with one modification.