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Stoyl P. Stoylov
Bulgarian Academy of Sciences
61Publications
11H-index
691Citations
Publications 61
Newest
#1Kamelia Kamburova (BAS: Bulgarian Academy of Sciences)H-Index: 8
#2Tsetska Radeva (BAS: Bulgarian Academy of Sciences)H-Index: 11
Last.Stoyl P. Stoylov (BAS: Bulgarian Academy of Sciences)H-Index: 11
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Self-assembled lipid nanotubes (LNTs) could mimic the lipid bilayer of biological membranes and are widely used as substrates for proteins in the biotechnology. Since the protein-LNT binding depends strongly on the physicochemical properties of the LNT, we studied one of the important properties of the “naked” (not associated with protein) LNT—their electrical polarizability. The experiments were performed on galactosyl ceramide nanotubes suspension through electric light scattering method. The ...
Abstract Hypothesis The strange stability of some colloid systems at the isoelectric point may be explained by interparticle electrostatic interactions (attractive and repulsive) of different electric charge patches on the particles’ surface, related to differences of their surface structure and possibly to adsorption of charged species on them. The coincidence of the minimum colloid stability with the electro-optically observed minimum of the particle electric polarizability (EP) is not in favo...
#1Anna Y. Gyurova (BAS: Bulgarian Academy of Sciences)H-Index: 5
#2Verjinia Doltchinkova (Sofia University)H-Index: 1
Last.Stoyl P. Stoylov (BAS: Bulgarian Academy of Sciences)H-Index: 11
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The electric properties of bacteria determine their non-specific interactions with the environment, in particular their pathogenic activity. The electric polarizability of Escherichia coli HB101 (K-12 strain) was studied while inactivation with ethanol (20–40 vol.%). The current investigation might be regarded as a continuation of previous research on the polarizability of E. coli at lower ethanol concentration (≤ 20 vol.%) and higher frequencies (≥ 20 kHz).
#1Stoyl P. Stoylov (BAS: Bulgarian Academy of Sciences)H-Index: 11
#2Svetla Stoilova-McPhie (UTMB: University of Texas Medical Branch)H-Index: 11
Abstract In this review article the theoretical and experimental possibilities of applying EO-methods for estimation of the physico-chemical properties of the organic nanotubes (ONTs) are studied. The ONTs are highly organized nanostructures of strongly elongated, anysometric, and hollow cylinders with a size range of 1 nm to 10,000 nm, e.g. in aqueous solutions they could behave as colloid (disperse) particles. They have high interaction ability due to their extremely large curved, rolled-up ex...
#1Stoyl P. Stoylov (BAS: Bulgarian Academy of Sciences)H-Index: 11
#2Anna Y. Gyurova (BAS: Bulgarian Academy of Sciences)H-Index: 5
Last.Svetla Danova (BAS: Bulgarian Academy of Sciences)H-Index: 14
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Abstract The theoretical and experimental studies of the particles' electric dipole moments in the microscopic and submicroscopic size range show that in the case of polar and conductive media the interfacial components of the dipole moments are of greatest importance. While in the range of manometer's sizes there seems to be no important problems in the identification and in the estimation of the values of the dipole moments at present, in the micrometer range there are serious problems. In thi...
#1S. JovtchevH-Index: 2
#2N. HristovaH-Index: 1
Last.Stoyl P. Stoylov (BAS: Bulgarian Academy of Sciences)H-Index: 11
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ABSTRACTIn this paper we make a short overview of our experimental work on the effect of different factors influencing the red blood cell (RBC) aggregation induced by the neutral polymers dextran (Dx) and polyethylene glycol (PEG). Suspensions of washed RBC in phosphate buffered saline (final hematocrit = 0.40 v/v, pH=7.4) were used throughout this study. The Zeta sedimentation technique was applied to quantify RBC aggregation. It gives the opportunity to modify the RBC-RBC interactions pressing...
#1Stoyl P. Stoylov (BAS: Bulgarian Academy of Sciences)H-Index: 11
#2Anna Y. Gyurova (BAS: Bulgarian Academy of Sciences)H-Index: 5
Last.Svetla Danova (BAS: Bulgarian Academy of Sciences)H-Index: 14
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Abstract In the scientific literature in the last 40 years, some data for the permanent dipole moment and the electric polarizability of Escherichia coli can be found [S.P. Stoylov, Colloid Electro-Optics – Theory, Techniques and Application, Academic Press, London, 1991]. In this paper the data based mainly on electro-optic investigation is considered as much as some dipolophoretic (most often called dielectrophoretic) studies. Serious grounds are found to doubt the conclusions made for the ele...
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