INTRODUCTION: Electrospun polymer fibers have emerged as a promising candidate for future tissue ... more INTRODUCTION: Electrospun polymer fibers have emerged as a promising candidate for future tissue engineering and biomedical in-vivo and invitro appliances (1,2). Recent studies have argued that polyurethane in electrospun form have potential applications within the area of regenerative medicine employed for wound dressing, cell alignment, annalus fibrous tissue engineering, promoting endothelial proliferation, high performance filters and scaffolding promoting neuronal differentiation of human embryonic stem cells (1,2). Even though PU is a comparably well studied biomaterial that have been readily applied in biomedical applications, the complex surface interactions between electrospun PU fibers and cells are not well understood. Oxygen plasma surface modification (PSM) is a versatile material processing technique that has been shown to selectively modify surface properties such as wettability, adhesion and biocompatibility of polymer surfaces, and can improve surface properties for...
In the present paper, we report the results of environmental monitoring of the mountain Kinnekull... more In the present paper, we report the results of environmental monitoring of the mountain Kinnekulle habitat area (Västra Götaland county, Sweden) and discuss its nature conservation value. As part of our comparative study of Kinnekulle’s flora, between 2018 and 2023 we have studied population dynamics of plants growing there. In the present study, we compare our plant inventory results and those provided by Carl Linnaeus in his book “Västgöta Resa År 1746” (“The trip to Västra Götaland, 1746”), providing evidence that most of the plants listed by Linnaeus can still be found in the Kinnekulle area (58–94% occurrence). A part of the paper is a historical tribute to Carl Linnaeus and his trip to the Kinnekulle area. An English translation of Linnaeus’ text on Kinnekulle’s nature and plant inventory list can be found in the supplement materials of the paper.
Theoretical work on QCM-D based acoustic sensors operated in gases, vapors and liquids containing... more Theoretical work on QCM-D based acoustic sensors operated in gases, vapors and liquids containing dispersed microscopic particles is developed. With the main goal to provide theoretical support to the sensors for air pollution control, our analytical results supplemented with numerical calculations provide a way to quantify measurements taking into account the shear viscosity of liquid as a function of pollutant particles number for the small volume fractions (i.e., within the Einstein relation) and beyond the Einstein relation numbers. For the higher concentrations, the packing factor variation has been tested for modeling microscopic particles in water dispersions. Various types of pollutants with known density were used for modeling such as polymer particles, carbon black, fullerenes, mineral dust and bacteria. For the non-spherical particles, the shape factor was introduced as an additional model parameter. The role of softness of the surface-attached layer is studied in details.
Quartz crystal resonators are among the most popular acoustic sensor devices. In this chapter we ... more Quartz crystal resonators are among the most popular acoustic sensor devices. In this chapter we discuss the basic principles of the quartz crystal microbalance (QCM) technique and review current approaches to analyzing QCM measurements. We also discuss a number of practical applications of the QCM device and provide selected examples of new trends.
Mathematical modeling is an important theoretical tool which provides researchers with quantifica... more Mathematical modeling is an important theoretical tool which provides researchers with quantification of the permeability of dialyzing systems in renal replacement therapy. In the paper we provide a short review of the most successful theoretical approaches and refer to the corresponding experimental methods studying these phenomena in both biological and synthetic filters in dialysis. Two levels of modeling of fluid and solute transport are considered in the review: thermodynamic and kinetic modeling of hemodialysis and peritoneal dialysis. A brief account for hindered diffusion across cake layers formed due to membrane filters fouling is given, too.
The monolayer or multIlayer assemblies constructed by means of Langmuir-Blodgett techniques CLB f... more The monolayer or multIlayer assemblies constructed by means of Langmuir-Blodgett techniques CLB films) are the subject of the relatively new and multidisciplinary field of surface sciences [1,2]. These ultrathin ( d ~ 25A) films deposited on the solid substrate consist of amphiphile molecules which have both hydrophilIC and hydrophobic properties [3]. Such unique molecular architecture allows to create different coupling between the substrate and the absorbed LB film. The weak coupling may be realized by wet chemical methods when the “hydrocarbon” side of LB film is deposited on hydrophobic substrate surface. The strong coupling corresponds to the chemical bound of LB polar head groups with hydrophilic substrate. These molecular “sandwiches” have been applied succesfully as functional material in modern sensors, blosensors, In particular, in surface acoustic wave devices [4,5]. In respect of LB film application In gas-senSing detectors [6], the quantitative analysis of acousllc changes in LB film, caused by gas absorbtion seems to be important.
The key physical processes in polymeric filters used for the blood purification include transport... more The key physical processes in polymeric filters used for the blood purification include transport across the capillary wall and the interaction of blood cells with the polymer membrane surface. Theoretical modeling of membrane transport is an important tool which provides researchers with a quantification of the complex phenomena involved in dialysis. In the paper, we present a dense review of the most successful theoretical approaches to the description of transport across the polymeric membrane wall as well as the cell–polymer surface interaction, and refer to the corresponding experimental methods while studying these phenomena in dialyzing filters.
Detection of supported membranes with the acoustic sensor devices is an important objective of ma... more Detection of supported membranes with the acoustic sensor devices is an important objective of many existing nanotechnology needs. Surface acoustic wave (SAW)-based sensors belong to the leading group among acoustic sensors due to their considerable advantages such as high frequency, high gravimetric sensitivity and wireless monitoring. Selected examples are electronic nose- and environmental biosensor applications where thin (bio)organic coatings of various nature are used for the sensing layer (supported membrane) to monitor volatile components in vapors and gases by means of acoustics. In the present paper we consider the physical theory of supported membrane dynamics on solid supports and provide analytical formulae that allow obtain such physical parameters as surface mass, viscoelasticity and coupling strength parameter from the changes in the velocity of the surface wave and the dissipation that can be measured experimentally in SH SSW-based acoustic sensors.
INTRODUCTION: Electrospun polymer fibers have emerged as a promising candidate for future tissue ... more INTRODUCTION: Electrospun polymer fibers have emerged as a promising candidate for future tissue engineering and biomedical in-vivo and invitro appliances (1,2). Recent studies have argued that polyurethane in electrospun form have potential applications within the area of regenerative medicine employed for wound dressing, cell alignment, annalus fibrous tissue engineering, promoting endothelial proliferation, high performance filters and scaffolding promoting neuronal differentiation of human embryonic stem cells (1,2). Even though PU is a comparably well studied biomaterial that have been readily applied in biomedical applications, the complex surface interactions between electrospun PU fibers and cells are not well understood. Oxygen plasma surface modification (PSM) is a versatile material processing technique that has been shown to selectively modify surface properties such as wettability, adhesion and biocompatibility of polymer surfaces, and can improve surface properties for...
In the present paper, we report the results of environmental monitoring of the mountain Kinnekull... more In the present paper, we report the results of environmental monitoring of the mountain Kinnekulle habitat area (Västra Götaland county, Sweden) and discuss its nature conservation value. As part of our comparative study of Kinnekulle’s flora, between 2018 and 2023 we have studied population dynamics of plants growing there. In the present study, we compare our plant inventory results and those provided by Carl Linnaeus in his book “Västgöta Resa År 1746” (“The trip to Västra Götaland, 1746”), providing evidence that most of the plants listed by Linnaeus can still be found in the Kinnekulle area (58–94% occurrence). A part of the paper is a historical tribute to Carl Linnaeus and his trip to the Kinnekulle area. An English translation of Linnaeus’ text on Kinnekulle’s nature and plant inventory list can be found in the supplement materials of the paper.
Theoretical work on QCM-D based acoustic sensors operated in gases, vapors and liquids containing... more Theoretical work on QCM-D based acoustic sensors operated in gases, vapors and liquids containing dispersed microscopic particles is developed. With the main goal to provide theoretical support to the sensors for air pollution control, our analytical results supplemented with numerical calculations provide a way to quantify measurements taking into account the shear viscosity of liquid as a function of pollutant particles number for the small volume fractions (i.e., within the Einstein relation) and beyond the Einstein relation numbers. For the higher concentrations, the packing factor variation has been tested for modeling microscopic particles in water dispersions. Various types of pollutants with known density were used for modeling such as polymer particles, carbon black, fullerenes, mineral dust and bacteria. For the non-spherical particles, the shape factor was introduced as an additional model parameter. The role of softness of the surface-attached layer is studied in details.
Quartz crystal resonators are among the most popular acoustic sensor devices. In this chapter we ... more Quartz crystal resonators are among the most popular acoustic sensor devices. In this chapter we discuss the basic principles of the quartz crystal microbalance (QCM) technique and review current approaches to analyzing QCM measurements. We also discuss a number of practical applications of the QCM device and provide selected examples of new trends.
Mathematical modeling is an important theoretical tool which provides researchers with quantifica... more Mathematical modeling is an important theoretical tool which provides researchers with quantification of the permeability of dialyzing systems in renal replacement therapy. In the paper we provide a short review of the most successful theoretical approaches and refer to the corresponding experimental methods studying these phenomena in both biological and synthetic filters in dialysis. Two levels of modeling of fluid and solute transport are considered in the review: thermodynamic and kinetic modeling of hemodialysis and peritoneal dialysis. A brief account for hindered diffusion across cake layers formed due to membrane filters fouling is given, too.
The monolayer or multIlayer assemblies constructed by means of Langmuir-Blodgett techniques CLB f... more The monolayer or multIlayer assemblies constructed by means of Langmuir-Blodgett techniques CLB films) are the subject of the relatively new and multidisciplinary field of surface sciences [1,2]. These ultrathin ( d ~ 25A) films deposited on the solid substrate consist of amphiphile molecules which have both hydrophilIC and hydrophobic properties [3]. Such unique molecular architecture allows to create different coupling between the substrate and the absorbed LB film. The weak coupling may be realized by wet chemical methods when the “hydrocarbon” side of LB film is deposited on hydrophobic substrate surface. The strong coupling corresponds to the chemical bound of LB polar head groups with hydrophilic substrate. These molecular “sandwiches” have been applied succesfully as functional material in modern sensors, blosensors, In particular, in surface acoustic wave devices [4,5]. In respect of LB film application In gas-senSing detectors [6], the quantitative analysis of acousllc changes in LB film, caused by gas absorbtion seems to be important.
The key physical processes in polymeric filters used for the blood purification include transport... more The key physical processes in polymeric filters used for the blood purification include transport across the capillary wall and the interaction of blood cells with the polymer membrane surface. Theoretical modeling of membrane transport is an important tool which provides researchers with a quantification of the complex phenomena involved in dialysis. In the paper, we present a dense review of the most successful theoretical approaches to the description of transport across the polymeric membrane wall as well as the cell–polymer surface interaction, and refer to the corresponding experimental methods while studying these phenomena in dialyzing filters.
Detection of supported membranes with the acoustic sensor devices is an important objective of ma... more Detection of supported membranes with the acoustic sensor devices is an important objective of many existing nanotechnology needs. Surface acoustic wave (SAW)-based sensors belong to the leading group among acoustic sensors due to their considerable advantages such as high frequency, high gravimetric sensitivity and wireless monitoring. Selected examples are electronic nose- and environmental biosensor applications where thin (bio)organic coatings of various nature are used for the sensing layer (supported membrane) to monitor volatile components in vapors and gases by means of acoustics. In the present paper we consider the physical theory of supported membrane dynamics on solid supports and provide analytical formulae that allow obtain such physical parameters as surface mass, viscoelasticity and coupling strength parameter from the changes in the velocity of the surface wave and the dissipation that can be measured experimentally in SH SSW-based acoustic sensors.
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Papers by marina voinova