69 Result(s)

Article

Competition of (3+2) annulation and (3+2) cycloaddition in the reaction of alkenes with donor-acceptor cyclopropanes

Lewis acid-initiated reaction of (het)aryl-substituted donor-acceptor cyclopropanes with styrenes was studied. The initiation of the process by tin(IV) chloride caused the reaction to proceed in two alternative d...

Yu. A. Volkova, M. A. Boichenko, V. V. Shorokhov… in Russian Chemical Bulletin (2024)

Article

Change in Permeability of Loose Rocks in Partial Impregnation with High-Elastic Polymer

The article describes the laboratory testing of permeability and structure of loose rock hardened with two-component highly elastic polyurethane resin at different methods of impregnation and at different cons...

T. V. Shilova, I. M. Serdyuk, S. V. Serdyukov, O. A. Ivanova… in Journal of Mining Science (2024)

Article

Estimation of Spatial Distribution of Potential Sources of Carbonaceous Aerosol from Local Measurements near St. Petersburg

The results of a back-trajectory analysis of 9-year (2013–2021) measurements of organic (OC) and elemental (EC) aerosol carbon concentrations made at the atmospheric monitoring station near St. Petersburg (Pet...

S. S. Vlasenko, O. A. Ivanova… in Izvestiya, Atmospheric and Oceanic Physics (2023)

Article

Perspectives of the Development and Problems of Exploration of a Resource Base of Deficient Strategic Mineral Deposits of Siberia

The state of art of the mineral-resource base of strategic solid mineral deposits in Russia in general, and in Siberia in particular, is reviewed. Special attention is paid to the perspectives of the developme...

N. P. Pokhilenko, V. P. Afanasiev, A. V. Tolstov, N. N. Kruk… in Geology of Ore Deposits (2023)

Article

Comparison of the I and IV Diamond Types (According to Orlov’s Classification) from the Snap Lake Deposit (Slave Craton, Canada)

Diamonds of I and IV types (according to Yu.L. Orlov’s classification) from Snap Lake kimberlites were studied. Based on study of the morphology, defect–impurity profile, and internal structure of these diamon...

O. A. Ivanova, Academician N. P. Pokhilenko, V. P. Afanasiev… in Doklady Earth Sciences (2023)

Article

Solid-Phase Biodegradation of Polylactides (Review)

The main problem associated with the use of polylactides (PLAs) in various fields is the requirement for their controlled degradation in the composition of waste. However, the possibilities of biodegradation o...

V. V. Mironov, E. S. Trofimchuk, N. A. Zagustina… in Applied Biochemistry and Microbiology (2022)

Article

Ring expansion of donor—acceptor cyclopropanes bearing arylcarbamoyl group into 1,5-diarylpyrrolidin-2-ones

The rearrangement of 2,N-diaryl-1-carbamoylcyclopropanecarboxylates upon their treatment with titanium(iv) chloride was found to proceed as ring expansion affording 1,5-diaryl-2-oxopyrrolidine-3-carboxylates. In ...

A. E. Vartanova, A. Yu. Plodukhin, M. A. Boichenko… in Russian Chemical Bulletin (2022)

Article

Cyclic Vectors and Invariant Subspaces of the Backward Shift Operator in Schwartz Modules

Cyclic vectors and proper closed invariant subspaces of the backward shift operator in the Schwartz modules of entire functions of exponential type are described. The results are applied to describe ideals of...

O. A. Ivanova, S. N. Melikhov in Functional Analysis and Its Applications (2022)

Article

Operators of Almost Hadamard Type and Hardy–Littlewood Operator in the Space of Entire Functions of Several Complex Variables

We introduce the class of operators of almost Hadamard type, that is, linear continuous operators that act on a locally convex space containing all polynomials and have the property that the homogeneous poly...

O. A. Ivanova, S. N. Melikhov in Mathematical Notes (2021)

Chapter and Conference Paper

On the Commutant of the Generalized Backward Shift Operator in Weighted Spaces of Entire Functions

We study continuous linear operators, which commute with the generalized backward shift operator (a one-dimensional perturbation of the Pommiez operator) in a countable inductive limit E of weighted Banach spaces...

O. A. Ivanova, S. N. Melikhov in Operator Theory and Differential Equations (2021)

Article

Variation of Carboneceous Atmospheric Aerosol Near St. Petersburg

The results of 5-year (2013–2017) measurements of organic (OC) and elemental (EC) carbon aerosol fractions observed at the atmospheric monitoring station near St. Petersburg (Petergof, 59.88° N, 29.83° E) are ...

S. S. Vlasenko, K. A. Volkova, D. V. Ionov… in Izvestiya, Atmospheric and Oceanic Physics (2019)

Article

On Invariant Subspaces of the Pommiez Operator in the Spaces of Entire Functions of Exponential Type

We describe closed invariant eigenspaces of the Pommmiez operator in the (LF)-space of entire functions of exponential type. This space is topologically equivalent (by means of the Laplace transform) to the st...

O. A. Ivanova, S. N. Melikhov in Journal of Mathematical Sciences (2019)

Article

Subpollen Particles as Atmospheric Cloud Condensation Nuclei

Bioparticles constitute a significant fraction of atmospheric aerosol. Their size range varies from nanometers (macromolecules) to hundreds of micrometers (plant pollen and vegetation residues). Like other atm...

E. F. Mikhailov, O. A. Ivanova… in Izvestiya, Atmospheric and Oceanic Physics (2019)

Article

On Multiplication of Distributions Generated by the Pommiez Operator

O. A. Ivanova, S. N. Melikhov in Mathematical Notes (2019)

Article

R482L Mutation of the LMNA Gene Affects Dynamics of C2C12 Myogenic Differentiation and Stimulates Formation of Intramuscular Lipid Droplets

Mutations in the LMNA gene resulting in the substitution of the highly conserved arginine 482 residue in the globular C-terminal domain of lamin A/C are associated with the Dunnigan-type familial partial lipodyst...

N. V. Khromova, K. I. Perepelina, O. A. Ivanova… in Biochemistry (Moscow) (2019)

Article

Nanocomposites Based on Porous Polylactide, Obtained by Crazing Mechanism in Water–Ethanol Solutions, and Calcium Phosphates

Systematic investigations of uniaxial deformation of an amorphous isotropic polylactide film in water–ethanol solutions of different composition are carried out and optimal conditions for polymer deformation b...

E. S. Trofimchuk, A. V. Efimov, M. A. Moskvina, O. A. Ivanova… in Polymer Science, Series A (2018)

Article

Inclusions in diamonds from Snap Lake kimberlites (Slave Craton, Canada): Geochemical features of crystallization

The results of integrated studies of inclusion-containing diamonds from kimberlites of the Snap Lake dike complex (Canada) are presented. Features of the morphology, defect–impurity composition, and internal s...

O. A. Ivanova, A. M. Logvinova, N. P. Pokhilenko in Doklady Earth Sciences (2017)

Article

Cloud condensation nuclei activity of the Aitken mode particles near St. Petersburg, Russia

Aitken mode atmospheric particles largely control the formation and transformation of cloud systems, which in turn have an effect on their radiative properties. In this paper, a measurement technique for the c...

E. F. Mikhailov, O. A. Ivanova… in Izvestiya, Atmospheric and Oceanic Physics (2017)

Article

3-Substituted Thietane-1,1-Dioxides: Synthesis, Antidepressant Activity, and in Silico Prediction of Their Pharmacokinetic and Toxicological Properties

3-Aryloxy- and 3-phenylsulfanylthietane-1,1-dioxides were synthesized by reacting 3,5-dibromo-1-(1,1-dioxothietan-3-yl)-1,2,4-triazole with sodium phenolates and thiophenolate. The 5-aryloxy- and 5-arenesulfon...

E. É. Klen, I. L. Nikitina, N. N. Makarova… in Pharmaceutical Chemistry Journal (2017)

Article

Reaction of donor-acceptor cyclopropanes with 1,3-diphenylisobenzofuran. Lewis acid effect on the reaction pathway

Reaction of donor-acceptor cyclopropanes with 1,3-diphenylisobenzofuran in the presence of lanthanide triflates, as well as CuOTf, Sn(OTf)₂, SnCl₂, ZnCl₂, GaCl₃, and MgI₂, proceeds as a formal [3+4]-cycloaddition...

A. O. Chagarovskiy, O. A. Ivanova, E. M. Budynina… in Russian Chemical Bulletin (2013)