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Tytuł:
First report on the occurrence of Neseuretinus and Ovalocephalus trilobites in the Middle Ordovician of Iran
Autorzy:
Ghobadi, Pour M
Popov, L.E.
Powiązania:
https://bibliotekanauki.pl/articles/21343.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
trilobite
taxonomy
Trilobita
paleontology
Shirgesht Formation
Ovalocephalus
Neseuretinus
Ordovician
paleobiogeography
Middle Ordovician
Iran
Opis:
In the Derenjal Mountains of east Central Iran, the upper part of the Shirgesht Formation (uppermost Darriwilian) contains a distinct trilobite assemblage that includes Neseuretinus birmanicus and Ovalocephalus aff. obsoletus among others. Both genera were previously unknown in Iran. The occurrence of Ovalocephalus represents the earliest sign of westward taxon migration from China towards higher latitudes along the West Gondwanan margin, which may be related to global warming, after a short episode of cooler climate in the early to mid Darriwilian. Patterns of biogeographical distribution of Ovalocephalus and Neseuretinussuggest that Central Iran was part of an “overlap zone” where tropical and high latitude benthic taxa mingled.
Źródło:
Acta Palaeontologica Polonica; 2009, 54, 1; 125-133
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ordovician ostracods from East Central Iran
Autorzy:
Ghobadi Pour, M.
Williams, M.
Vannier, J.
Meidla, T.
Popov, L.E.
Powiązania:
https://bibliotekanauki.pl/articles/22059.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
geographic setting
Iran
Ordovician
Ostracoda
Shirgesht Formation
brachiopod
geological setting
ostracod
paleontology
trilobite
systematics
ostracod fauna
biogeography
stratigraphy
Opis:
Ordovician ostracods are described for the first time from Iran, enhancing the record of this group from the Lower Palaeozoic of the Middle East. The ostracods occur in the Shirgesht Formation, in the east central part of the country, and comprise Ogmoopsis achaemenid sp. nov., Cerninella aryana sp. nov., Ordovizona amyitisae sp. nov., cf. Aechmina? ventadorni, Vogdesella sp., and podocope taxa tentatively identified as species of Longiscula, Pullvillites, and Rectella. These taxa were hitherto unknown from this region. The ostracod−bearing interval is associated with trilobites (Neseuretinus) and brachiopods (Nicolella) that suggest a late Middle Ordovician age. Although the ostracod fauna is small, it demonstrates biogeographical links at genus−level, and possibly at species−level, with the fauna of the late Middle Ordovician Travesout Formation of western France, which also lay in a peri−Gondwanan palaeogeographical setting. It also suggests the potential use of some ostracods as stratigraphical tools for correlating Ordovician rock successions between Europe and the Middle East.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reflection from layered dielectric structures with combined regular and random inhomogeneities
Autorzy:
Guzev, M.A.
Popov, G.V.
Powiązania:
https://bibliotekanauki.pl/articles/308755.pdf
Data publikacji:
2000
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
optical waveguides
layered structures
Opis:
Optical wave reflection from a layered half-space with regular and random inhomogeneities where the regular perturbations correspond to a linear waveguide near the half-space boundary. Random inhomogeneities are simulated in the frame of the white noise model. The problem is solved analytically in a framework of the embedding method which reduces a boundary problem to the problem with initial values considering the field as a function of the half-space boundary coordinate and obtaining then its solution as a steady-state probability density of the reflection coefficient phase. Numerical calculations revealed some features of the field behaviour under the combined influence of regular and random inhomogeneities such as the reflection coefficient phase increasing inhomogeneity from uniform distribution for small regular inhomogeneities toward a strong peak at the phase equal to pi/2 for increasing ones, and some fine effects which are still greater then the calculation accuracy.
Źródło:
Journal of Telecommunications and Information Technology; 2000, 1-2; 80-82
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silurian stratigraphy of Central Iran - an update
Autorzy:
Hairapetian, V.
Ghobadi Pour, M.
Popov, L. E.
Männik, P.
Miller, C. G.
Powiązania:
https://bibliotekanauki.pl/articles/139183.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Iran
Silurian
biostratigraphy
lithostratigraphy
sedimentology
correlation
sylur
biostratygrafia
litostratygrafia
sedymentologia
korelacja
Opis:
The Silurian biostratigraphy, lithostratigraphy, and facies of Central Iran including the Kashmar (Boghu Mountains), Tabas (Derenjal Mountains, Ozbak-Kuh), Anarak (Pol-e Khavand) and Kerman regions is reviewed and updated. The current state of knowledge of the Silurian in the Zagros Basin, Alborz, Kopet-Dagh and Talysh regions, as well as in a few areas scattered across the Sabzevar Zone, and the Sanandaj-Sirjan terranes is also reviewed. Silurian volcanism in various parts of Iran is briefly discussed. The end of the Ordovician coincided with a widespread regression across Iran synchronous with the Hirnantian glaciation, and only in the Zagros Basin is there a continuous Ordovician–Silurian transition represented by graptolitic black shales of the Sarchahan Formation. In the Central-East Iranian Platform marine sedimentation re-commenced in the early to mid Aeronian. By the Sheinwoodian, carbonate platform depositional environments were established along its north-eastern margin. In other parts of Iran (e.g., Kopet-Dagh and the Sabzevar Zone), siliciclastic sedimentation continued probably into the late Silurian. The Silurian conodont and brachiopod biostratigraphy of Central Iran is significantly updated facilitating a precise correlation with the Standard Global Chronostratigraphic Scale, as well as with key Silurian sections in other parts of Iran. The Silurian lithostratigraphy is considerably revised and two new lithostratigraphical units, namely the Boghu and Dahaneh-Kalut formations, are introduced.
Źródło:
Acta Geologica Polonica; 2017, 67, 2; 201-233
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetoelastic Anomalies and Suppression of Jahn-Teller Distortions in La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ by Pulsed Magnetic Fields
Autorzy:
Kadomtseva, A. M.
Popov, Yu. F.
Vorob'ev, G. P.
Kamilov, K. I.
Ivanov, V. Yu.
Mukhin, A. A.
Balbashov, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/2013240.pdf
Data publikacji:
2000-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Kz
75.50.Pp
Opis:
Thermal expansion Δl/l(T) and magnetostriction λ$\text{}_{∥, ⊥ }$(H,T) in the pulsed magnetic fields H up to 250 kOe were studied in the single La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ crystals (x=0.1, 0 .125, and 0.15) at temperatures T=10-320 K. Anomalies in the Δl/l (T) curves were observed near a charge (polaron) ordering (T$\text{}_{p}$) and structural transitions between orthorhombic Jahn-Teller distorted O' phase and high temperature orthorhombic (pseudocubic) O$\text{}^{*}$ one (T'$\text{}_{s}$). A noticeable increase in the field-induced magnetostriction λ$\text{}_{∥, ⊥ }$(H) was revealed in the O' phase at T$\text{}_{p}$
Źródło:
Acta Physica Polonica A; 2000, 97, 3; 599-602
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of boundary effects on electron beam dose distribution formation in multilayer targets
Autorzy:
Kałuska, I.
Lazurik, V. T.
Lazurik, V. M.
Popov, G. F.
Rogov, Y. V.
Zimek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/148556.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
absorbed dose
electron beam
simulation
Monte Carlo
software ModeStEB
dosimetry
Opis:
Computational dosimetry play a significant role in an industrial radiation processing at dose measurements in the product irradiated with electron beams (EB), X-ray and gamma ray from radionuclide sources. Accurate and validated programs for absorbed dose calculations are required for computational dosimetry. The program ModeStEB (modelling of EB processing in a three-dimensional (3D) multilayer flat targets) was designed specially for simulation and optimization of industrial radiation processing, calculation of the 3D absorbed dose distribution within multilayer packages. The package is irradiated with scanned EB on an industrial radiation facility that is based on the pulsed or continuous type of electron accelerators in the electron energy range from 0.1 to 25 MeV. Simulation of EB dose distributions in the multilayer targets was accomplished using the Monte Carlo (MC) method. Experimental verification of MC simulation prediction for EB dose distribution formation in a stack of plates interleaved with polyvinylchloride (PVC) dosimetric films (DF), within a packing box, and irradiated with a scanned 10 MeV EB on a moving conveyer is discussed.
Źródło:
Nukleonika; 2010, 55, 3; 363-368
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of rolling friction with sliding
Modelirovanie processa trenija kachenija so skolzheniem
Autorzy:
Kirichenko, I.
Kashura, A.
Morneva, M.
Popov, S.
Powiązania:
https://bibliotekanauki.pl/articles/792332.pdf
Data publikacji:
2014
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
friction force
adhesion
rolling friction
contact area
sliding friction
wheel
locomotive
thrust
mathematical model
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 2
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technological standardization
Tekhnologicheskaja standartizacija
Autorzy:
Kirichenko, I.
Morneva, M.
Kashura, A.
Popov, S.
Powiązania:
https://bibliotekanauki.pl/articles/792013.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
standardization
technological cycle
production
interchangeability
typification
conformity assessment
effectiveness
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2015, 15, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impedance Spectra of As-Grown and Heat Treated $Na_{0.5}Bi_{0.5}TiO_3$ Crystals
Autorzy:
Kruzina, T.
Sidak, V.
Trubitsyn, M.
Popov, S.
Tuluk, A.
Suchanicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1398237.pdf
Data publikacji:
2018-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.84.-s
43.58.Bh
72.80.Rj
Opis:
The complex impedance spectra Z*(ω) were studied for as-grown and annealed in air $Na_{0.5}Bi_{0.5}TiO_3$ single crystals. Experimental data showed that annealing significantly increased impedance and led to appearance of low frequency Z* relaxation. The detected relaxation processes were associated with charge transfer within the regions with initial and reduced after annealing concentration of oxygen vacancies.
Źródło:
Acta Physica Polonica A; 2018, 133, 4; 816-818
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On integrability in F-spaces
Autorzy:
M. Popov, Mikhail
Powiązania:
https://bibliotekanauki.pl/articles/1290202.pdf
Data publikacji:
1994
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
Some usual and unusual properties of the Riemann integral for functions x : [a,b] → X where X is an F-space are investigated. In particular, a continuous integrable $l_p$-valued function (0 < p < 1) with non-differentiable integral function is constructed. For some class of quasi-Banach spaces X it is proved that the set of all X-valued functions with zero derivative is dense in the space of all continuous functions, and for any two continuous functions x and y there is a sequence of differentiable functions which tends to x uniformly and for which the sequence of derivatives tends to y uniformly. There is also constructed a differentiable function x with $x'(t_0) = x_0$ for given $t_0$ and $x_0$ and x'(t) = 0 for $t ≠ t_0$.
Źródło:
Studia Mathematica; 1994, 110, 3; 205-220
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Ordovician brachiopods from the Selety River basin, North Central Kazakhstan
Autorzy:
Nikitin, I F
Popov, L.E.
Bassett, M.G.
Powiązania:
https://bibliotekanauki.pl/articles/22739.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
brachiopod
Ordovician
Late Ordovician
biogeography
Selety River
taxonomy
Kazakhstan
Brachiopoda
paleontology
Opis:
A medium−diversity fauna of late Ordovician rhynchonelliformean brachiopods occurs in the Tauken Formation (upper Caradoc–lowermost Ashgill) of north Central Kazakhstan.It demonstrates close similarity to the approximately contemporaneous faunas characteristic of shallow clastic shelves (BA 2–3) of the Chingiz and Chu−Ili ranges (both in Kazakhstan) and South China, but is characterized by a high proportion of endemic new species, including Tetraphalerella bestiubensis sp.nov., Glyptomena kaskolica sp.nov., Dinorthis taukensis sp.nov., Rhynchotrema seletensis sp.nov., and Nalivkinia (Pronalivkinia)zvontsovisp.nov.The abundance of Rhynchotrema is somewhat unusual by comparison with faunas from other Kazakhstanian terranes, where rhynchonellides of the family Ancistrorhynchidae are usually dominant in near−shore biofacies.The occurrence of the atrypides Sulcatospira and early Nalivkinia demonstrates a clear biogeographical linkage with approximately contemporaneous faunas of South China.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
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:
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:
POLSKA do NATO.
Autorzy:
Popov, Gavril.
Wroński, Paweł (1964- ).
Geremek, Bronisław.
Brzeziński, Zbigniew (1928-2017).
Węglarczyk, Bartosz.
Zaucha, Andrzej M.
Powiązania:
Gazeta Wyborcza 1997, nr 158. Dod. "Polska do NATO", s. I-IV
Współwytwórcy:
Bosacki, Marcin. Opracowanie
Data publikacji:
1997
Tematy:
NATO rozszerzenie polityka
NATO a Polska integracja polityka
NATO a Europa Środkowo-Wschodnia integracja polityka
NATO a Rosja polityka
NATO a Czechy integracja polityka
NATO a Węgry integracja polityka
Opis:
Fot.; Zawiera: NATO 1999 : Polska, Czechy i Węgry wejdą do NATO podczas szczytu...w kwietniu 1999 r.... / Bartosz Węglarczyk ; współpr. Andrzej M. Zaucha; Jak zdobywaliśmy Zachód : [droga Polski do NATO] / Bartosz Węglarczyk; Czas zadośćuczynienia decyzji szczytu NATO to dla Polski koniec historycznego niebezpieczeństwa z zachodu i zmniejszenie niebezpieczeństwa ze wschodu : rozmowa z prof. Zbigniewem Brzezińskim / rozm. Marcin Bosacki; Polska wraca do wspólnoty Zachodu / Bronisław Geremek; Można było inaczej : [Rosja wobec rozszerzenia NATO] / Gawrił Popow; Gdy Polska da nam rozkaz : [8 Zmechanizowana Brygada Wybrzeża gotowa do integracji z NATO] / Paweł Wroński.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Late Ordovician palaeogeography and the positions of the Kazakh terranes through analysis of their brachiopod faunas
Autorzy:
Popov, L. E.
Cocks, L. R. M.
Powiązania:
https://bibliotekanauki.pl/articles/138779.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Sandbian
katian
brachiopods
Kazakhstan
palaeogeography
Central Asian Orogenic Belt
sandb
kat
ramienionogi
Kazachstan
paleogeografia
Azja Środkowa
Opis:
Detailed biogeographical and biofacies analyses of the Late Ordovician brachiopod faunas with 160 genera, grouped into 94 faunas from individual lithotectonic units within the Kazakh Orogen strongly support an archipelago model for that time in that area. The Kazakh island arcs and microcontinents within several separate clusters were located in the tropics on both sides of the Equator. Key units, from which the Late Ordovician faunas are now well known, include the Boshchekul, Chingiz-Tarbagatai, and Chu-Ili terranes. The development of brachiopod biogeography within the nearly ten million year time span of the Late Ordovician from about 458 to 443 Ma (Sandbian, Katian, and Hirnantian), is supported by much new data, including our revised identifications from the Kazakh Orogen and elsewhere. The Kazakh archipelago was west of the Australasian segment of the Gondwana Supercontinent, and relatively near the Tarim, South China and North China continents, apart from the Atashu-Zhamshi Microcontinent, which probably occupied a relatively isolated position on the south-western margin of the archipelago. Distinct faunal signatures indicate that the Kazakh terranes were far away from Baltica and Siberia throughout the Ordovician. Although some earlier terranes had joined each other before the Middle Ordovician, the amalgamation of Kazakh terranes into the single continent of Kazakhstania by the end of the Ordovician is very unlikely. The Late Ordovician brachiopods from the other continents are also compared with the Kazakh faunas and global provincialisation statistically determined.
Źródło:
Acta Geologica Polonica; 2017, 67, 3; 323-380
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
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