A5100742692- Surfactants and Colloidal Systems
- Spectroscopy and Quantum Chemical Studies
- Polymer Surface Interaction Studies
- Lipid Membrane Structure and Behavior
- Proteins in Food Systems
- Dendrimers and Hyperbranched Polymers
- Photonic and Optical Devices
- RNA Interference and Gene Delivery
- Inhalation and Respiratory Drug Delivery
- Analytical Chemistry and Sensors
- Analytical Chemistry and Chromatography
- Advanced biosensing and bioanalysis techniques
- Electrostatics and Colloid Interactions
- Aerosol Filtration and Electrostatic Precipitation
- Semiconductor Lasers and Optical Devices
- Liquid Crystal Research Advancements
- Optical Imaging and Spectroscopy Techniques
- Protein Interaction Studies and Fluorescence Analysis
- Luminescence Properties of Advanced Materials
- Neonatal Respiratory Health Research
- Pregnancy and preeclampsia studies
- Gas Sensing Nanomaterials and Sensors
- Photonic Crystals and Applications
- Semiconductor Quantum Structures and Devices
- Advanced Drug Delivery Systems
St Petersburg University
1993-2024
First Pavlov State Medical University of St. Petersburg
2021
Research Institute of Obstetrics and Gynecology named after D.O. Ott
2021
Pushkin Leningrad State University
1992
Physico-Technical Institute
1991
The adsorption layers of complexes between DNA and oppositely charged surfactants dodecyltrimethylammonium bromide (DTAB) cetyltrimethylammonium (CTAB) at the solution/air interface were studied with surface tensiometry, dilational rheology, atomic force microscopy, Brewster angle infrared absorption–reflection spectroscopy, ellipsometry. Measurements kinetic dependencies properties gave a possibility to discover time intervals corresponding coexistence two-dimensional phases. One can assume...
The formation of ordered 2D nanostructures double stranded DNA molecules at various interfaces attracts more and focus in medical engineering research, but the underlying intermolecular interactions still require elucidation. Recently, it has been revealed that mixtures with a series hydrophobic cationic polyelectrolytes including poly(N,N-diallyl-N-hexyl-N-methylammonium) chloride (PDAHMAC) form network ribbonlike or threadlike aggregates solution—air interface. In present work, we adopt...
The spread layers of lysozyme (LYS) microgel particles were studied by surface dilational rheology, infrared reflection–absorption spectra, Brewster angle microscopy, atomic force and scanning electron microscopy. It is shown that the properties LYS differ significantly from those ß-lactoglobulin (BLG) layers. In latter case, protein layer mainly a monolayer, interactions between lead to increase in dynamic elasticity up 140 mN/m. contrast, does not exceed values for pure compression...
The absorbance studies of the optical radiation reflection from boundary two soft-matter media with a thin monolayer between are performed for number angles incidence. reflectance and spectra described in terms unique spectrum invariant respect to incidence angles. angular dependence s -polarized is shown not provide any extra information as compared single-angle study line previously developed theoretical considerations. We verify it experimentally performing multi-angle infrared...
The interactions of DNA with lysozyme in the surface layer were studied by performing infrared reflection-absorption spectroscopy (IRRAS), ellipsometry, tensiometry, dilational rheology, and atomic force microscopy (AFM). A concentrated solution was injected into an aqueous subphase underneath a spread layer. While optical properties changed fast after injection, dynamic elasticity almost did not change, thereby indicating no continuous network formation DNA/lysozyme complexes, unlike case...
The contribution of the surface layer to reflection coefficients is shown be determined by four integral values, which can interpreted as real and imaginary parts two complex permittivity excesses. reflectance-absorbance spectra are these parameters. excess integrals cannot found with angular measurements reflection-absorption spectra, only three dependent terms. To determine integrals, it necessary involve experimental data spectroscopic ellipsometry or polarization-modulation infrared...
Infrared Reflection-Absorption Spectroscopy (IRAS) is a very useful tool to investigate the conformation of amphiphiles at air/water interface. Herein, monomolecular films consisting 1-hexadecanol were studied using different incident angles and states polarization. It shown that for s-polarization bands are negative, intensities decrease with increasing incidence. For p-polarization, negative only encountered small incidence angles, while large become positive.
The present investigation aims at studying the blood flow in umbilical vein first half of normal pregnancy. It was shown that establishing hemocirculation passes through 4 periods: 8- 10th, 11-12th, 13-16th and after 16th week Besides that, statistically verified changes maximum speed index pulsation this vessel were revealed. Constant bloodstream spectrum reflects stability oxygenic bloodsupply fetus.