Non-Newtonian Flow of Structured Systems. XIX. Blood Flow

Kirsanov, E. A.; Timoshin, Yu. N.

doi:10.18083/lcappl.2016.3.78

Cited by 4 publications

(7 citation statements)

References 5 publications

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“…In [41] based on calculations by the generalized flow equation of the Casson for model emulsions (o/w), a result was obtained, according to which, at the same volumetric oil concentration, an increase in the droplet diameter leads to a decrease in 1 2 с  и 1 2 с  . A similar result was noted for suspensions [38]. However, these studies used systems with a rather narrow monomodal particle size distribution.…”

Section: Figure 7 Correlation Between Different Diameters Of Emulsion Droplets and The Aggregation Coefficient τ Csupporting

confidence: 76%

“…Earlier, in [35] to describe the behavior of aqueous solutions of food gelling agents for the analysis of the obtained curves of flow, we used the generalized flow equation of the Casson rheological model [38]. Initially, this model was developed for polymer melts [39], but it is suitable for describing dispersed systems, including emulsions and suspensions [40,41].…”

Section: Emulsion Curves Of Flow and Model Fittingmentioning

confidence: 99%

“…This model is a generalization and extension to real systems of the classical microrheological model Casson [42] with an additional interpretation of the coefficients of this model based on the kinetic equations of destruction -recovery of structural aggregates of the Kross model [43]. The proposed mechanism of viscous flow is associated with the dissipation of the energy of this flow when flowing around a set of aggregates and individual particles under the condition of their hydrodynamic interaction, the possible destruction of aggregates due to breaking hydrodynamic forces and unification during collisions of particles and aggregates [38]. The generalized flow equation for this approach is represented by the expression (7):…”

Section: Emulsion Curves Of Flow and Model Fittingmentioning

confidence: 99%

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Design, rheology and microstructure of food-grade emulsion-based systems for delivery of vitamin D

2020

Chemical Series

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The fortification of food with vitamin D has several limitations because this group of fat-soluble compounds may degrade or undergo undesirable changes during technologic processing and storage of food. The purpose of this study was to investigate emulsions for vitamin D3 delivery in commercial foods. Oil-in-water (o/w) emulsions stabilized by mixture of various proteins (whey protein isolate (WPI), skimmed milk powder (SMP) and vegan protein isolate (VPI)) as emulsifiers and carboxymethylcellulose as thickening agent were used. The shear stress and effective dynamic viscosity of the emulsions in the wide range of shear rates were experimentally determined. By approximating experimental flow curves using the power-law model, the values of the consistency coefficient and flow behavior index were obtained, which made it possible to classify the emulsions as systems with pseudoplastic flow. Within the framework of the structural approach, the rheological data were analyzed on the basis of the generalized rheological model of Casson. The contributions to the process of viscous flow calculated from the experimental data from the integral characteristics of associates of droplets and individual particles during their hydrodynamic interaction made it possible to explain the effect of changing the viscosity of emulsions from the nature of the emulsifier used. The zeta potential values determined by the dynamic light scattering method indicate the existence of a strong repulsive force as a factor for the stability of emulsions. The sign of the potential and its magnitude indicate the process of adsorption on the surface of fat droplets molecule of protein. The presence of a peak of flocculated particles in the histograms of the particle size distribution is explained by the presence of non-adsorbing polysaccharides, which are capable of the generation of aggregated emulsion structures through depletion flocculation. Regardless of the choice of the type and nature of the protein emulsifier - animal or plant origin, all studied systems were stable and can be considered for use as emulsion-based delivery systems of vitamin D. From an economic point of view, it is advisable to use dry milk as an emulsifier. The resulting emulsions can be used as a basis for the production of vitamin D3-fortified foods, in particular for dairy products.

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Section: Figure 7 Correlation Between Different Diameters Of Emulsion Droplets and The Aggregation Coefficient τ Csupporting

confidence: 76%

Section: Emulsion Curves Of Flow and Model Fittingmentioning

confidence: 99%

Section: Emulsion Curves Of Flow and Model Fittingmentioning

confidence: 99%

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Design, rheology and microstructure of food-grade emulsion-based systems for delivery of vitamin D

2020

Chemical Series

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“…Rheological characteristics of borosiloxane and nanocomposites based on it were measured with modular compact rheometer MCR 302e (Anton Paar, Graz, Austria). To describe the non-Newtonian behavior of systems, one can apply the approach [28], which uses multiparameter rheological equations in a wide range of shear rates.…”

Section: Borosiloxan Composites Synthesis and Rheological Characteristics Assaymentioning

confidence: 99%

New Organosilicon Composite Based on Borosiloxane and Zinc Oxide Nanoparticles Inhibits Bacterial Growth, but Does Not Have a Toxic Effect on the Development of Animal Eukaryotic Cells

et al. 2021

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The present study a comprehensive analysis of the antibacterial properties of a composite material based on borosiloxane and zinc oxide nanoparticles (ZnO NPs). The effect of the polymer matrix and ZnO NPs on the generation of reactive oxygen species, hydroxyl radicals, and long-lived oxidized forms of biomolecules has been studied. All variants of the composites significantly inhibited the division of E. coli bacteria and caused them to detach from the substrate. It was revealed that the surfaces of a composite material based on borosiloxane and ZnO NPs do not inhibit the growth and division of mammalians cells. It is shown in the work that the positive effect of the incorporation of ZnO NPs into borosiloxane can reach 100% or more, provided that the viscoelastic properties of borosiloxane with nanoparticles are retained.

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“…Rheological characteristics of borosiloxane and nanocomposites based on it were measured with modular compact rheometer MCR 302e (Anton Paar, Graz, Austria). To describe the non-Newtonian behavior of systems, one can apply the approach [46], which uses multiparameter rheological equations in a wide range of shear rates.…”

Section: Borosiloxane Composites Synthesis and Rheological Characteristics Assaymentioning

confidence: 99%

Novel Biocompatible with Animal Cells Composite Material Based on Organosilicon Polymers and Fullerenes with Light-Induced Bacteriostatic Properties

et al. 2021

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A technology for producing a nanocomposite based on the borsiloxane polymer and chemically unmodified fullerenes has been developed. Nanocomposites containing 0.001, 0.01, and 0.1 wt% fullerene molecules have been created. It has been shown that the nanocomposite with any content of fullerene molecules did not lose the main rheological properties of borsiloxane and is capable of structural self-healing. The resulting nanomaterial is capable of generating reactive oxygen species (ROS) such as hydrogen peroxide and hydroxyl radicals in light. The rate of ROS generation increases with an increase in the concentration of fullerene molecules. In the absence of light, the nanocomposite exhibits antioxidant properties. The severity of antioxidant properties is also associated with the concentration of fullerene molecules in the polymer. It has been shown that the nanocomposite upon exposure to visible light leads to the formation of long-lived reactive protein species, and is also the reason for the appearance of such a key biomarker of oxidative stress as 8-oxoguanine in DNA. The intensity of the process increases with an increase in the concentration of fullerene molecules. In the dark, the polymer exhibits weak protective properties. It was found that under the action of light, the nanocomposite exhibits significant bacteriostatic properties, and the severity of these properties depends on the concentration of fullerene molecules. Moreover, it was found that bacterial cells adhere to the surfaces of the nanocomposite, and the nanocomposite can detach bacterial cells not only from the surfaces, but also from wetted substrates. The ability to capture bacterial cells is primarily associated with the properties of the polymer; they are weakly affected by both visible light and fullerene molecules. The nanocomposite is non-toxic to eukaryotic cells, the surface of the nanocomposite is suitable for eukaryotic cells for colonization. Due to the combination of self-healing properties, low cytotoxicity, and the presence of bacteriostatic properties, the nanocomposite can be used as a reusable dry disinfectant, as well as a material used in prosthetics.

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Non-Newtonian Flow of Structured Systems. XIX. Blood Flow

Cited by 4 publications

References 5 publications

Design, rheology and microstructure of food-grade emulsion-based systems for delivery of vitamin D

Design, rheology and microstructure of food-grade emulsion-based systems for delivery of vitamin D

New Organosilicon Composite Based on Borosiloxane and Zinc Oxide Nanoparticles Inhibits Bacterial Growth, but Does Not Have a Toxic Effect on the Development of Animal Eukaryotic Cells

Novel Biocompatible with Animal Cells Composite Material Based on Organosilicon Polymers and Fullerenes with Light-Induced Bacteriostatic Properties

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