A5090661680- Synthesis and Characterization of Heterocyclic Compounds
- Ferroelectric and Piezoelectric Materials
- Synthesis of Tetrazole Derivatives
- Synthesis and biological activity
- Peptidase Inhibition and Analysis
- Solid-state spectroscopy and crystallography
- High-pressure geophysics and materials
- Geological and Geophysical Studies
- X-ray Diffraction in Crystallography
- Multiferroics and related materials
- Synthesis and Reactions of Organic Compounds
- Acoustic Wave Resonator Technologies
- Gamma-ray bursts and supernovae
- Crystallization and Solubility Studies
- Stellar, planetary, and galactic studies
- Advanced Breast Cancer Therapies
- Cancer Immunotherapy and Biomarkers
- Ancient and Medieval Archaeology Studies
- Crystal Structures and Properties
- Graphene and Nanomaterials Applications
- Nonlinear Optical Materials Research
- Magnetic and transport properties of perovskites and related materials
- Phase-change materials and chalcogenides
- Astrophysics and Star Formation Studies
- Information Systems and Technology Applications
Ioffe Institute
2015-2024
First Pavlov State Medical University of St. Petersburg
2021-2023
Ministry of Health of the Russian Federation
2021-2023
Russian Scientific Center of Radiology and Surgical Technologies
2022-2023
Volgograd State Medical University
2021
Pulkovo Observatory
2016
ITER
2016
St Petersburg University
2011-2014
Physico-Technical Institute
1974-1987
Pushkin Leningrad State University
1987
Background: Immune checkpoint inhibitors (ICIs) have transformed cancer treatment by stimulating anti-tumor immunity. However, evaluating therapy response remains challenging due to atypical patterns such as pseudoprogression, which can mimic true progressive disease on imaging and therefore lead discontinuation of a potentially effective treatment. Specific criteria were designed better differentiate between pseudoprogression disease. F-18 FDG PET/CT has proven itself valuable modality in...
The paper presents results of studies the dielectric response and structure PbCo1/3Nb2/3O3 (PCN) crystal. Analysis at frequencies ranging from 10 Hz to 50 kHz has revealed a considerable dispersion in wide temperature interval. Anomalies dependences ϵ′ ϵ″ vicinity 350, 250, 130 К have been observed. It is shown that anomaly near 250 K can be attributed transition into relaxor ferroelectric state, whereas occurs nearby antiferromagnetic phase transition. behaviour 350 requires further...
Raman spectroscopic studies of loparite‐(Ce), a mineral the perovskite family, are presented. Polarized spectra were obtained in temperature range 50–300 K. As analysis behavior modes showed, dependences wavenumber, damping and intensity optical exhibited anomalies near 220 150 Softening low‐wavenumber observed vicinity K is interpreted as an evidence ferroelectric phase transition. An anisotropic quasielastic light scattering region was from 300 to data suggest, loparite‐(Ce) has two...
Results of dielectric and Raman spectroscopic studies single crystals loparite-(Ce), a mineral the perovskite family, are presented. A ferroelectric phase transition in vicinity 157 K relaxation contribution into lattice dynamics loparite-(Ce) were investigated. Temperature dependence time range 150 – 400 was obtained from quasi-elastic light scattering measurements. This temperature found to be well described by Arrhenius law. As analysis showed, processes observed our experiments could...
Abstract The totality of structural and spectroscopic data implies that the H2PO4 − groups in crystal lattice ferroelectric phase KDP represent molecular formations. Their structure, force field charge distribution are determined by covalent binding pattern. Spontaneous polarization ion-molecular model a is represented sum oppositely directed surface contribution bulk polarization. produced dipoles anions, contribution, charged layers created at polar faces proton ordering. being...
Abstract Spectroscopic data suggest that the anion sublattice of KDP paraphase is orientationally disordered and made up predominantly same dihydrophosphate anions H2PO− 4 as ferroelectric phase lattice. The dynamic fluctuations such a lattice manifest themselves ‘‘quasirotations'’ representing rearrangements electronic structure induced by synchronous proton transfer in H-bonds. A structural approach to analysis reveals two kinds differing time characteristcs spectral manifestations.
We report on the results of studies dielectric properties loparite-(Ce), a naturally occurring member perovskite-type family materials, in temperature range 80–400 K. A strong frequency dispersion attributable to disorder and anomaly have been observed vicinity T = 157 The behavior inverse permittivity 1/ε′(T) has found be well described by Curie–Weiss law with parameters C 2.2 × 105 K−1 Tm Studies hysteresis demonstrated presence ferroelectric loops below ≈ K, which points existence phase...
Triple negative breast cancer (TNBC) is the most aggressive variant of malignancies, being a heterogeneous group with various molecular abnormalities that require differentiated approach to diagnosis and treatment.The article contains current data on modern classifications triple appropriate defects in signaling pathways as well their assignment distinct immunological metabolic biomarkers.The prognostic predictive role tumor biomarkers, clinically used cellular therapy approaches developing...
In hypertension, the administration of several single-component antihypertensive drugs from different groups increases choice pharmacotherapy options. Conducted a quantitative assessment these options at various stages intensification therapy. The international nonproprietary name, trade name and dosage were taken into account. methods combinatorics used for calculation. At each stage intensification, number possible combinations increased significantly, which could eventually reach 1 834...