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Wyszukujesz frazę "Popov, N." wg kryterium: Autor


Wyświetlanie 1-9 z 9
Tytuł:
Elastic (hμ)$\text{}_{1s}$ + He$\text{}^{++}$ Scattering and the Influence of Adiabatic Corrections on (Heμh)$\text{}^{++}$ Bound States
Autorzy:
Gronowski, J.
Czapliński, W.
Popov, N.
Powiązania:
https://bibliotekanauki.pl/articles/2041542.pdf
Data publikacji:
2004-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.60.+z
36.10.Gv
Opis:
Cross-sections for elastic scattering of muonic hydrogen on helium nuclei, (hμ)$\text{}_{1s}$ + He$\text{}^{++}$, where h and He$\text{}^{++}$ stands for a hydrogen and a helium isotope nucleus, respectively, were calculated in the one-level adiabatic approximation for a range of collision energies from 0 to 50 eV. Bound states and energy levels of (hμHe)$\text{}^{++}$ molecular ions were also calculated and compared with their Born-Oppenheimer counterparts. It is shown that adiabatic corrections are responsible for proper positions of the Ramsauer-Townsend minima in (hμ)$\text{}_{1s}$+He$\text{}^{++}$ elastic scattering and, at the same time, they significantly influence bound states and energy levels of (Heμh)$\text{}^{++}$ and (Heπh)$\text{}^{++}$ ions. Calculations were performed in the frame of the phase-function method.
Źródło:
Acta Physica Polonica A; 2004, 106, 6; 795-816
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Muon Transfer in Hydrogen Isotopic Mixtures
Autorzy:
Czapliński, W.
Kravtsov, A.
Mikhailov, A.
Popov, N.
Powiązania:
https://bibliotekanauki.pl/articles/1968877.pdf
Data publikacji:
1998-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.60.+z
Opis:
Direct and inverse muon transfer between atomic orbits of muonic hydrogen isotopes is considered in the WKB approximation. The corresponding cross sections, calculated as functions of collision energy, are different above the thresholds for the inverse transfer and approach common limits depending on the principal quantum number and hydrogen isotopes. The comparison of results obtained by integration over impact parameter and by summation over angular momentum is also presented.
Źródło:
Acta Physica Polonica A; 1998, 93, 4; 617-623
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of injection technologies in the device of ground constructions in different geological terms
Zastosowanie technik iniekcyjnych w celu posadowienia konstrukcji w różnych warunkach geologicznych
Autorzy:
Dudlya, N. A.
Popov, A. V.
Telnih, N. N.
Tsaplin, E. G.
Powiązania:
https://bibliotekanauki.pl/articles/300063.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
technologie iniekcyjne
injection technologies
Opis:
A theoretical ground and examples of successful application of injection re-enforcement of soils for the improvement of his uniformity and rise of bearing strength is given in foundation of different buildings.
W artykule omówiono podstawy teoretyczne i przykłady skutecznego zastosowania technologii iniekcyjnych w celu poprawy spójności gruntów oraz podwyższenia ich wytrzymałości dla posadowienia fundamentów budynków.
Źródło:
Wiertnictwo, Nafta, Gaz; 2009, 26, 3; 507-515
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Defects of Non-Stoichiometry and Dynamic Stability of SnTe Crystal Lattice
Autorzy:
Rogacheva, E. I.
Sinelnik, N. A.
Nashchekina, O. N.
Popov, V. P.
Lobkovskaya, T. A.
Powiązania:
https://bibliotekanauki.pl/articles/1929741.pdf
Data publikacji:
1993-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.70.Bv
65.70.+y
Opis:
The temperature dependencies of coefficient of linear expansion α in the range of 4.2-300 K were obtained for SnTe samples with various degrees of deviation from stoichiometry. For the sample of stoichiometric composition in the α vs. temperature curves the anomalies connected with ferroelectric phase transition were detected. It was found that within cubic phase existence region α isotherms have a minimum at 50.4 at.% Te. Maximum dynamic stability at indicated composition is believed to be associated with the formation of vacancy superstructure.
Źródło:
Acta Physica Polonica A; 1993, 84, 4; 733-736
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recombination nearby N-n GaSb/GaInAsSb Staggered Lineup Heterojunction
Autorzy:
Popov, A. A.
Imenkov, A. N.
Kolchanova, N. M.
Yakovlev, Yu. P.
Piotrowski, T. T.
Powiązania:
https://bibliotekanauki.pl/articles/1877143.pdf
Data publikacji:
1995-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.20.Nz
Opis:
The recombination nearby large band-offset staggered lineup N-GaSb/n-GaInAsSb heterojunction was investigated by means of the electroluminescence and carrier lifetime measurements. It was demonstrated that the nature of recombination, tuning rate as well as relation between radiative and non-radiative recombination strongly depend on the N-n band-offset and that its increase improves the carrier localization on the N-n interface.
Źródło:
Acta Physica Polonica A; 1995, 87, 2; 559-562
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tribological properties of multilayered vacuum coating
Autorzy:
Rogachou, A.
Popov, A.
Piliptsov, D.
Yarmolenko, M.
Rogachev, A.
Fedosenko, N.
Powiązania:
https://bibliotekanauki.pl/articles/385181.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
diamond-like coatings
polytetrafluoroethylene
polyurethane
friction
Opis:
The results of studies show the deposition conditions of the titanium-nitride based coatings and their structure influence on the tribological characteristics of the dry friction and in the diesel fuel. Tribological characteristics of multilayered systems on the basis of diamond-like coatings (DLC) have been studied. The deposition of the systems onto small-size cutting tools is found efficient for improving their service characteristics. When depositing the coatings to the cutting tool surface the microrelief of edges is not distorted and the service life increases 1.3 - 1.5 times. The morphology and tribological behaviour of composite and multi-layer polymer coatings based on polytetrafluoroethylene (PTFE) and polyurethane (PU) are studied after deposition by means the method of electron beam dispersion. It is shown possibility to produce fine-film systems based on polyurethane with polytetrafluoroethylene as filler that possess high tribological performance.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 115-117
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive potential and productivity of two Salix viminalis L. clonal varieties grown in North Central Bulgaria
Autorzy:
Stankova, T.
Gyuleva, V.
Tsvetkov, I.
Popov, E.
Kalmukov, K.
Dimitrov, D.N.
Andonova, E.
Stefanova, P.
Powiązania:
https://bibliotekanauki.pl/articles/2130197.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
basket willow
spacing
rotation
allometry
site conditions
Opis:
Salix viminalis L. is a broadly cultivated willow species that has been intensively used for breeding purposes, particularly in selection of clones and hybrids for biomass production. The present study aimed to explore and compare growth and adaptability of two basket willow (Salix viminalis L.) clonal varieties - rubra and purpurea - at the specific edaphic and climate conditions and cultivation practice presented in an experimental plantation in North Central Bulgaria. The influence of spacing, genotype, root age and rotation on their productivity were also investigated and allometric relationships for non-destructive estimation of woody plant biomass were suggested. The trial plantation was established in the spring of 2018 as 4 sectors of a Nelder wheel plot with 15 nearly-square spacings, ranging from 0.25 to 9.80 m2 (40000–1020 plants per hectare). The two varieties were arranged in 4 four-spoke sectors (2 sectors per clone). Data collection took place from 2018 to 2020 and comprised 1- and 2-year rotations. The study showed that Salix viminalis var. rubra was more susceptible to desiccation-causing adverse climatic changes, poorly adapted to the specific conditions of the study site and gradually died out during the second and the third year. Salix viminalis var. purpurea exhibited steady survival rate (97 - 77%) and annual biomass productivity varying from 3 to 17 Mg/ha/year across the densities, sectors and years. During the first year of growth purpurea variety had a significantly higher plant weight and sprout number than rubra variety. Growing space affected positively the number of shoots and tree dendromass, and sprouting was reinforced by coppicing that doubled the shoot number during the subsequent rotation. This was reflected in the development of the stump-level allometric models that were differentiated according to rotation. The stump-level allometric model of higher predictive power was based on the main shoot length and shoot number. An exponential relationship to the breast-height shoot diameter was also suggested for biomass estimation of each sprout separately.
Źródło:
Dendrobiology; 2022, 88; 1-15
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The comparative study of influence of lactic and glycolic acids copolymers type on properties of daunorubicin loaded nanoparticles and drug release
Autorzy:
Nikolskaya, E.
Sokol, M.
Faustova, M.
Zhunina, O.
Mollaev, M.
Yabbarov, N.
Tereshchenko, O.
Popov, R.
Severin, E.
Powiązania:
https://bibliotekanauki.pl/articles/307136.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
nanocząsteczki
daunorubicyna
PLGA
uwalnianie kontrolowane
stała dysocjacji
nanoparticles
daunorubicin
controlled release
MCF7/MCF7 Adr
dissociation constant
Opis:
The aim of this study was to compare the physico-chemical and biological properties of polymeric nanoparticles obtained from poly(DL-lactide-co-glycolide) (PLGA) with different ratios of monomers loaded with daunorubicin (DNR). Methods: DNR-loaded nanoparticles (NPs) were prepared with use of modified simultaneous double-emulsion solvent evaporation/diffusion technique. NPs were characterized using dynamic light scattering, atomic force microscopy, transmission electron microscopy, scanning electron microscopy, and differential scanning calorimetry and Fourier transform infrared spectroscopy. Results: NPs with DNR were differing in size and zeta potential, depending on the type of polymer. The data obtained show that total content of DNR correlates with the values of the binding constant of DNR with polymers. The release of DNR from NPs proceeds predominantly for polymers with lower binding constants. The in vitro study of NPs on the MCF-7 cells showed similar activity of particles and substances while for the anthracycline-resistant MCF-7Adr cells the cytotoxicity of the nanoparticles was 3 to 7 times higher depending on the type of copolymer. Conclusions: PLGA DNR-loaded nanoparticles can be used to overcome multidrug resistance (MDR) as well as for reducing the frequency of DNR reception due to the prolonged effect, which allows maintaining the concentration of the drug at the required level. The usefulness of binding constant calculations for obtaining nanoparticles with the maximum drug loading was proven. The rate of drug administration and the frequency of administration can be calculated based on the DNR release profiles and release parameters that depend on polymer type.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 1; 65-77
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Search for Chelyabinsk Meteorite Fragments in Chebarkul Lake Bottom (GPR and Magnetic Data)
Autorzy:
Buzin, V.
Edemsky, D.
Gudoshnikov, S.
Kopeikin, V.
Morozov, P.
Popov, A.
Prokopovich, I.
Skomarovsky, V.
Melnik, N.
Berkut, A.
Merkulov, S.
Vorovsky, P.
Bogolyubov, L.
Powiązania:
https://bibliotekanauki.pl/articles/307795.pdf
Data publikacji:
2017
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
Chelyabinsk meteorite
Ground Penetrating Radar
Opis:
The paper summarizes experimental efforts of the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN) undertaken in search of the biggest part of Chelyabinsk meteorite in the bottom of lake Chebarkul, South Ural, Russia, and to estimate the ecological effects of its subsequent excavation.
Źródło:
Journal of Telecommunications and Information Technology; 2017, 3; 69-78
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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