Mariia P'v - Academia.edu (original) (raw)
Papers by Mariia P'v
Measurements with the Mariia magnetic scintillation spectrometer on the Salyut-7-Soyuz-Cosmos-166... more Measurements with the Mariia magnetic scintillation spectrometer on the Salyut-7-Soyuz-Cosmos-1669 complex were carried out in an effort to determine the mechanism responsible for the generation of the electron-positron component of cosmic rays in the Brazilian-anomaly region. Charge-state measurements indicate that electrons make up the greater part of the electron-positron flux of the inner radiation belt. This finding makes it necessary to exclude nuclear interaction with subsequent pion-muon-electron decay as the electron-generation mechanism in the radiation belt.
![Research paper thumbnail of Proximal heteroalkylation of monoalkoxycalix[4]arenes in synthesis of inherently chiral molecules](https://attachments.academia-assets.com/48558005/thumbnails/1.jpg)
](Tetrahedron, 2009
Proximal heteroalkylation of monoalkyl ethers of calix[4]arenes or p-tert-butylcalix[4]arenes in ... more Proximal heteroalkylation of monoalkyl ethers of calix[4]arenes or p-tert-butylcalix[4]arenes in NaH/ CH 3 CN or NaOH/DMSO, respectively, was applied for synthesis of inherently chiral calixarenes with ABHH substitution pattern. The introduction by the method of (R)-or (S)-N-(a-phenylethyl)acetamide chiral auxiliary group gives mixtures of diastereomeric derivatives of inherently chiral calixarenes, which were separated by column chromatography. The chiral calixarenes were thoroughly characterized by 1 H, 13 C NMR, and X-ray diffraction methods.
Journal of Sustainable Agriculture, 1996
This study explored the effects of soil acidity on vegetative growth and germination of wheat. Fi... more This study explored the effects of soil acidity on vegetative growth and germination of wheat. Five wheat cultivars, two American ('Triumph 64,' 'Wakefield') and three Russian ('Mironovskaya 808,' 'Bezostaya,' and 'Inna'), were investigated for germination, growth, and dry matter accumulation under controlled conditions to eliminate the effect of environmental factors such as temperature, light, and precipitation. Soils with similar texture and various pH values were chosen for experiments. Soil was sampled from pastures where future wheat production may occur. Dry Matter Accumulation (DMA), percentage of seed germination, and height of seedlings were strongly reduced by acidic soils. The percent of wheat seeds germination (pH 4.99) for American cultivars Wakefield and Triumph 64 was 80.7 and 71.3 respectively. The percent of germination for Russian varieties was 74.0 (Mironovskaya 808), 75.6 (Bezostaya), and 77.3 (Inna) at pH 4.99. The height of seedlings for tested cultivars was always less on acidic soil (pH 4.99). Developing a wider range of wheat cultivars tested for acidic soils of southeastern Oklahoma would make a significant contribution to agriculture.
A simple theoretical description is proposed aiming at a qualitative explanation of the observed ... more A simple theoretical description is proposed aiming at a qualitative explanation of the observed in 11 dependences of the fluorescence from the resonant Rb levels excited by a single frequency diode laser on the magnetic field, when Hanle effect configuration of the experiment is used. The components of the statistical tensor for population and longitudinal alignment are calculated by iteration method up to fourth order terms. The spontaneous emission transfer influence is taken into account. A good qualitative agrement between calculated and experimentally observed resonances is obtained.
Izvestiya Akademii Nauk Seriya Fizicheskaya, 1993
The paper examines results of measurements of high-energy particle fluxes in the radiation belt o... more The paper examines results of measurements of high-energy particle fluxes in the radiation belt obtained using the Elektron instrument on the Intercosmos-Bulgaria-1300 and Meteor-3 satellites and the Mariia and Mariia-2 magnetic spectrometers on Salyut-7 and Mir. The results are examined from the standpoint of their connection with the earth's seismicity. In particular, it is shown that there exists a temporal and spatial correlation between abrupt short-duration changes in the intensity of high-energy charged particles and powerful earthquakes.
Astronomy & Astrophysics, 2007
We report the discovery of a new young stellar cluster and molecular cloud located in the far out... more We report the discovery of a new young stellar cluster and molecular cloud located in the far outer Galaxy, seen towards IRAS 06361-0142, and we characterise their properties. Near-infrared images were obtained with VLT/ISAAC through JHKs filters, millimetre line observations of CO(1-0) were obtained with SEST, and VLA 6 cm continuum maps obtained from archive data. The cloud and cluster are located at a distance of 7 kpc and a Galactocentric distance of 15 kpc, well in the far outer Galaxy. Morphologically, IRAS 06361-0142 appears as a cluster of several tens of stars surrounded by a nearly spherical nebular cavity centred at the position of the IRAS source. The cluster appears composed of low and intermediate-mass, young reddened stars with a large fraction having cleared the inner regions of their circumstellar discs responsible for (H - Ks) colour excess. The observations are compatible with a 4 Myr cluster with variable spatial extinction between Av = 6 and Av = 13.
Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2008
The cone-shaped calixarene N-chalconeamides were synthesized by the reaction of calix[4]arene car... more The cone-shaped calixarene N-chalconeamides were synthesized by the reaction of calix[4]arene carboxylic acids or acid chlorides with aminochalcones. It was found, that calixarene chalconeamides influence the Mg2+, ATP-dependent Ca2+ accumulation in mitochondria and sarcoplasmatic reticulum of the smooth muscle cells.
Astronomy & Astrophysics, 2007
SN 2000ft is detected in two independent Planetary Camera images (F547W and F814W) taken May 13, ... more SN 2000ft is detected in two independent Planetary Camera images (F547W and F814W) taken May 13, 2000, about two months before the predicted date of the explosion (July 19, 2000), based on the analysis of its radio light evolution by Alberdi and collaborators. The apparent optical magnitudes and red color of SN 2000ft indicate that it is observed through an extinction of at least A$_V$= 3.0 magnitudes. The extinction corrected lower limit to the absolute visual magnitude (M$_V$ leq−\leq -leq− 18.0), identifies SN 2000ft as a luminous supernova in the optical, as other luminous radio supernovae before. SN 2000ft exploded in a region located at only 0.1 arcsec (i.e. 34 +/- 3 pc) west of a faint cluster (C24). No parent cluster is identified within the detection limits of the HST short exposures. The unambiguous detection of SN 2000ft in the visual shows that multi-epoch sub-arcsecond (FWHM less than 0.1 arcsec) optical imaging is also a valid tool that should be explored further to detect supernovae in the dusty (circum)nuclear regions of (U)LIRGs.
Infection Control and Hospital Epidemiology, 2012
Measurements with the Mariia magnetic scintillation spectrometer on the Salyut-7-Soyuz-Cosmos-166... more Measurements with the Mariia magnetic scintillation spectrometer on the Salyut-7-Soyuz-Cosmos-1669 complex were carried out in an effort to determine the mechanism responsible for the generation of the electron-positron component of cosmic rays in the Brazilian-anomaly region. Charge-state measurements indicate that electrons make up the greater part of the electron-positron flux of the inner radiation belt. This finding makes it necessary to exclude nuclear interaction with subsequent pion-muon-electron decay as the electron-generation mechanism in the radiation belt.
Tetrahedron, 2009
Proximal heteroalkylation of monoalkyl ethers of calix[4]arenes or p-tert-butylcalix[4]arenes in ... more Proximal heteroalkylation of monoalkyl ethers of calix[4]arenes or p-tert-butylcalix[4]arenes in NaH/ CH 3 CN or NaOH/DMSO, respectively, was applied for synthesis of inherently chiral calixarenes with ABHH substitution pattern. The introduction by the method of (R)-or (S)-N-(a-phenylethyl)acetamide chiral auxiliary group gives mixtures of diastereomeric derivatives of inherently chiral calixarenes, which were separated by column chromatography. The chiral calixarenes were thoroughly characterized by 1 H, 13 C NMR, and X-ray diffraction methods.
Journal of Sustainable Agriculture, 1996
This study explored the effects of soil acidity on vegetative growth and germination of wheat. Fi... more This study explored the effects of soil acidity on vegetative growth and germination of wheat. Five wheat cultivars, two American ('Triumph 64,' 'Wakefield') and three Russian ('Mironovskaya 808,' 'Bezostaya,' and 'Inna'), were investigated for germination, growth, and dry matter accumulation under controlled conditions to eliminate the effect of environmental factors such as temperature, light, and precipitation. Soils with similar texture and various pH values were chosen for experiments. Soil was sampled from pastures where future wheat production may occur. Dry Matter Accumulation (DMA), percentage of seed germination, and height of seedlings were strongly reduced by acidic soils. The percent of wheat seeds germination (pH 4.99) for American cultivars Wakefield and Triumph 64 was 80.7 and 71.3 respectively. The percent of germination for Russian varieties was 74.0 (Mironovskaya 808), 75.6 (Bezostaya), and 77.3 (Inna) at pH 4.99. The height of seedlings for tested cultivars was always less on acidic soil (pH 4.99). Developing a wider range of wheat cultivars tested for acidic soils of southeastern Oklahoma would make a significant contribution to agriculture.
A simple theoretical description is proposed aiming at a qualitative explanation of the observed ... more A simple theoretical description is proposed aiming at a qualitative explanation of the observed in 11 dependences of the fluorescence from the resonant Rb levels excited by a single frequency diode laser on the magnetic field, when Hanle effect configuration of the experiment is used. The components of the statistical tensor for population and longitudinal alignment are calculated by iteration method up to fourth order terms. The spontaneous emission transfer influence is taken into account. A good qualitative agrement between calculated and experimentally observed resonances is obtained.
Izvestiya Akademii Nauk Seriya Fizicheskaya, 1993
The paper examines results of measurements of high-energy particle fluxes in the radiation belt o... more The paper examines results of measurements of high-energy particle fluxes in the radiation belt obtained using the Elektron instrument on the Intercosmos-Bulgaria-1300 and Meteor-3 satellites and the Mariia and Mariia-2 magnetic spectrometers on Salyut-7 and Mir. The results are examined from the standpoint of their connection with the earth's seismicity. In particular, it is shown that there exists a temporal and spatial correlation between abrupt short-duration changes in the intensity of high-energy charged particles and powerful earthquakes.
Astronomy & Astrophysics, 2007
We report the discovery of a new young stellar cluster and molecular cloud located in the far out... more We report the discovery of a new young stellar cluster and molecular cloud located in the far outer Galaxy, seen towards IRAS 06361-0142, and we characterise their properties. Near-infrared images were obtained with VLT/ISAAC through JHKs filters, millimetre line observations of CO(1-0) were obtained with SEST, and VLA 6 cm continuum maps obtained from archive data. The cloud and cluster are located at a distance of 7 kpc and a Galactocentric distance of 15 kpc, well in the far outer Galaxy. Morphologically, IRAS 06361-0142 appears as a cluster of several tens of stars surrounded by a nearly spherical nebular cavity centred at the position of the IRAS source. The cluster appears composed of low and intermediate-mass, young reddened stars with a large fraction having cleared the inner regions of their circumstellar discs responsible for (H - Ks) colour excess. The observations are compatible with a 4 Myr cluster with variable spatial extinction between Av = 6 and Av = 13.
Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2008
The cone-shaped calixarene N-chalconeamides were synthesized by the reaction of calix[4]arene car... more The cone-shaped calixarene N-chalconeamides were synthesized by the reaction of calix[4]arene carboxylic acids or acid chlorides with aminochalcones. It was found, that calixarene chalconeamides influence the Mg2+, ATP-dependent Ca2+ accumulation in mitochondria and sarcoplasmatic reticulum of the smooth muscle cells.
Astronomy & Astrophysics, 2007
SN 2000ft is detected in two independent Planetary Camera images (F547W and F814W) taken May 13, ... more SN 2000ft is detected in two independent Planetary Camera images (F547W and F814W) taken May 13, 2000, about two months before the predicted date of the explosion (July 19, 2000), based on the analysis of its radio light evolution by Alberdi and collaborators. The apparent optical magnitudes and red color of SN 2000ft indicate that it is observed through an extinction of at least A$_V$= 3.0 magnitudes. The extinction corrected lower limit to the absolute visual magnitude (M$_V$ leq−\leq -leq− 18.0), identifies SN 2000ft as a luminous supernova in the optical, as other luminous radio supernovae before. SN 2000ft exploded in a region located at only 0.1 arcsec (i.e. 34 +/- 3 pc) west of a faint cluster (C24). No parent cluster is identified within the detection limits of the HST short exposures. The unambiguous detection of SN 2000ft in the visual shows that multi-epoch sub-arcsecond (FWHM less than 0.1 arcsec) optical imaging is also a valid tool that should be explored further to detect supernovae in the dusty (circum)nuclear regions of (U)LIRGs.
Infection Control and Hospital Epidemiology, 2012