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Wyszukujesz frazę "Augustyniak, M. A." wg kryterium: Autor

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Aneuploidy in Polish cultivars of winter triticale (xTriticosecale Wittmack)
    Aneuploidalność w polskich odmianach ozimego pszenżyta (xTriticosecale Wittmack)
    Aneuploidija u polskikh sortov ozimogo tritikale (xTriticosecale Wittmack)
    Autorzy:
    Rogalska, S.M.
    Cybulska-Augustyniak, J.
    Kulawinek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/68206.pdf
    Data publikacji:
    1991
    Wydawca:
    Polska Akademia Nauk. Instytut Genetyki Roślin PAN
    Źródło:
    Genetica Polonica; 1991, 32, 1-2
    0016-6715
    Pojawia się w:
    Genetica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electron Spin Echo Envelope Modulation Analysis of SeO¯$\text{}_{3}$ Radical in (NH$\text{}_{4}$)$\text{}_{3}$H(SeO$\text{}_{4}$)$\text{}_{2}$ Single Crystal
    Autorzy:
    Tritt-Goc, J.
    Goslar, J.
    Hilczer, W.
    Hoffmann, S.
    Augustyniak, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929835.pdf
    Data publikacji:
    1993-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.60.Lz
    76.30.Mi
    Opis:
    A detailed computer analysis of the electron spin echo envelope modulations of SeO$\text{}_{3}$ radical in a suitable orientation of (NH$\text{}_{4}$)$\text{}_{3}$H(SeO$\text{}_{4}$)$\text{}_{2}$ single crystal is presented. It was found that the modulations are due to a weak dipolar coupling with nitrogens and protons of the only two neighbouring NH$\text{}_{4}$ groups among the five NH$\text{}_{4}$ groups surrounding SeO¯$\text{}_{3}$ center. Isotropic dipolar coupling constant is 1.7 MHz for nitrogens and 0.9 MHz for protons. It was shown that thermal reorientations of NH$\text{}_{4}$ groups observed by NMR have a negligible effect on the electron spin echo envelope modulation pattern but can be responsible for the same value of a$\text{}^{H}$$\text{}_{iso}$ for all protons in a NH$\text{}_{4}$ group. A good fit obtained between experimental spectra and theoretical calculations assuming nondisturbed crystal geometry indicates a small damage of the crystal by X-rays during the radical center formation.
    Źródło:
    Acta Physica Polonica A; 1993, 84, 6; 1131-1141
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Restricted Validity of the Two-State Model Describing a Vibronic EPR g-Factors Averaging in Cs$\text{}_{2}$Zn(SO$\text{}_{4}$)$\text{}_{2}$·6H$\text{}_{2}$O Tutton Salt Crystals Doped with Cu$\text{}^{2+}$ Ions
    Autorzy:
    Hoffmann, S. K.
    Kaszyński, R.
    Augustyniak, M. A.
    Hilczer, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2011161.pdf
    Data publikacji:
    1999-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.90.+t
    76.30.-v
    Opis:
    Single crystals and powder EPR spectra of Cu$\text{}^{2+}$ ions in Cs$\text{}_{2}$Zn(SO$\text{}_{4}$)$\text{}_{6}$·6H$\text{}_{2}$O were recorded in the temperature range of 4.2-300 K and the g-factor temperature variations were determined. The g$\text{}_{z}$ and g$\text{}_{y}$ have the values of 2.443 and 2.134, respectively, at the rigid lattice limit below 20 K, and then continuously tend to an average value on heating. This vibronic averaging produced by reorientations of Cu(H$\text{}_{2}$O)$\text{}_{6}$-complexes between Jahn-Teller distorted octahedral configurations is described in terms of a two-state Silver-Getz model which is known as a good model for diamagnetic non-ammonium Tutton salts. We found, however, that this model is only a crude approximation in Cs$\text{}_{2}$Zn(SO$\text{}_{4}$)$\text{}_{6}$·6H$\text{}_{2}$O below 150 K. Above this temperature the model works better and describes the vibronic dynamics between the two lowest energy potential wells in the adiabatic potential surface differing in the energy of δ$\text{}_{12}$=318(9) cm$\text{}^{-1}$=3.7 kJ/mol.
    Źródło:
    Acta Physica Polonica A; 1999, 96, 6; 733-740
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Intramolecular and Lattice Dynamics in V$\text{}_{6-n}^{IV}$V$\text{}_{n}\text{}^{V}$ O$\text{}_{7}$(OCH$\text{}_{3}$)$\text{}_{12}$ Crystal
    Autorzy:
    Yablokov, Yu. V.
    Augustyniak-Jabłokow, M. A.
    Borshch, S.
    Daniel, C.
    Hartl, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043556.pdf
    Data publikacji:
    2005-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.30.Fc
    36.40.Cg
    Opis:
    Multi-nuclear mixed-valence clusters V$\text{}_{4}^{IV}$V$\text{}_{2}^{V}$O$\text{}_{7}$(OCH$\text{}_{3}$)$\text{}_{12}$ were studied by X-band EPR in the temperature range 4.2-300 K. An isotropic exchange interactions between four V$\text{}^{IV}$ ions with individual spin S$\text{}_{i}$=1/2 determine the energy levels structure of the compound with the total spin states S=0, 1, and 2, which are doubled and split due to the extra electron transfer. The spin-Hamiltonian approach was used for the analysis of the temperature dependences of the EPR spectra parameters and the cluster dynamics. Two types of the electron transfer are assumed: the single jump transfer leading to the splitting of the total spin states by intervals comparable in magnitude with the exchange parameter J≈100-150 cm$\text{}^{-1}$ and the double jump one resulting in dynamics. The dependence of the transition ratesν$\text{}_{tr}$ on the energy of the total spin states was observed. In particular, in the range 300-220 K theν$\text{}_{tr}$ ≈0.7×10$\text{}^{10}$ cm$\text{}^{-1}$ and below 180 K the ν$\text{}_{tr}$≈1×10$\text{}^{10}$ cm$\text{}^{-1}$ was estimated. The g-factors of the spin states were shown to depend on the values of the intermediate spins. A phase transition in the T-range 210-180 K leading to the change in the initial V$\text{}^{IV}$ ions localization was discovered.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 2; 271-281
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin Transition Diagram of (2Me-5Et-PyH)[Fe(Th-5Cl-Sa)$\text{}_{2}$] Studied by EPR
    Autorzy:
    Krupska, A.
    Augustyniak-Jabłokow, M. A.
    Yablokov, V. Yu.
    Zelentsov, V. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043563.pdf
    Data publikacji:
    2005-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.30.-v
    33.35.+r
    Opis:
    The high-spin↔ low-spin transition in (2Me-5Et-PyH)[Fe(Th-5Cl-Sa)$\text{}_{2}$] was studied by EPR under hydrostatic pressure in the temperature range of 80-310 K. Two modifications of the low-spin complexes: low-pressure (LS-1) and high-pressure (LS-2) ones were revealed. The low-spin complexes are associated in domains. Under atmospheric pressure LS-1 appears or disappears at 220 K. The hydrostatic pressure shifts the transition to high temperatures. Above 410 MPa the abrupt changes of the g-factor and width Δ B of the EPR line are observed. The pressure-induced transition LS-1 ↔ LS-2 is almost independent of T up to 275 K where under pressure 420 MPa a triple point is observed. When the pressure has been decreased the reverse transition from LS-2 to LS-1 or to high spin phase (at T>260 K) occurs with a large hysteresis about 95 MPa.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 2; 291-296
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Origin of EPR Signals in SrCuO$\text{}_{2}$ Ceramics
    Autorzy:
    Augustyniak-Jabłokow, M. A.
    Yablokov, Yu. V.
    Ivanova, T. A.
    Jacyna-Onyszkiewicz, I.
    Shustov, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043623.pdf
    Data publikacji:
    2005-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ee
    76.30.Fc
    81.05.Je
    Opis:
    The origin and thermal evolution of the EPR signals in SrCuO$\text{}_{2}$ ceramics are studied. It has been shown that the EPR signals observed in this ceramic material are due to contamination with other phases. The axial signal is due to SrCu(OH)$\text{}_{4}$·H$\text{}_{2}$O, which is a product of water reactions with SrCuO$\text{}_{2}$.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 2; 345-351
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EPR Discovery of a New Pressure-Induced Low-Spin Phase in (2Me-5Et-PyH)[Fe(Th-5Cl-Sa)$\text{}_{2}$]
    Autorzy:
    Krupska, A.
    Augustyniak-Jabłokow, M. A.
    Yablokov, Yu. V.
    Zelentsov, V. V.
    Ulanov, V. A.
    Mroziński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046891.pdf
    Data publikacji:
    2006-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.30.Fc
    75.30.Wx
    Opis:
    Electron paramagnetic resonance studies of the high-spin (HS) ↔ low-spin (LS) transition in 2-methyl-5-ethyl-pyridine-5-chloro-salicylalt hiosemicarbazonatoferrate(III) performed under hydrostatic pressure up to 500 MPa in a temperature range of 80-310 K have revealed two modifications of the low spin complexes: low-pressure (LS1) and high-pressure (LS2) ones. Under atmospheric pressure LS1 appears on cooling and disappears on heating at 220 K. The hydrostatic pressure shifts the transition to higher temperatures. Below 275 K an increase in pressure to 410 MPa results in abrupt changes in the g-factor and widthΔ B of the EPR line indicating a transition to a new phase. The pressure-induced transition LS1 ↔ LS2 is almost independent of T up to 275 K, where at a pressure of 420 MPa a triple point is observed. The LS1↔ LS2 and HS↔ LS2 (at T>260 K) transitions occur with a large hysteresis of about 95 MPa. The process of the spin transition has been shown to begin with the formation of domains of LS complexes in the matrix of HS ones. The response of the domains to external factors has been studied.
    Źródło:
    Acta Physica Polonica A; 2006, 110, 1; 81-95
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EPR Study of Water Induced Decomposition of the SrCuO$\text{}_{2}$ and Sr$\text{}_{2}$CuO$\text{}_{3}$ Ceramics Surface. The Role of Carbon Dioxide
    Autorzy:
    Augustyniak-Jabłokow, M. A.
    Yablokov, Yu. V.
    Jacyna-Onyszkiewicz, I.
    Ivanova, T. A.
    Shustov, V. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047737.pdf
    Data publikacji:
    2007-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ee
    76.30.Fc
    81.05.Je
    Opis:
    Processes of SrCuO$\text{}_{2}$ and Sr$\text{}_{2}$CuO$\text{}_{3}$ ceramics decomposition induced by contact with water and carbon dioxide were studied by EPR. The dominant signals in the spectra were found to originate from Sr$\text{}_{2}$Cu(OH)$\text{}_{6}$ (for Sr$\text{}_{2}$CuO$\text{}_{3}$) and SrCu(OH)$\text{}_{4}$·H$\text{}_{2}$O (for SrCuO$\text{}_{2}$) compounds. The thermally induced conversion of SrCu(OH)$\text{}_{4}$·H$\text{}_{2}$O into Sr$\text{}_{2}$Cu(OH)$\text{}_{6}$ was analysed, and its product CuO was found to exist in the nanocrystalline form. The presence of CO$\text{}_{2}$, reacting with Sr(OH)$\text{}_{2}$, was shown to modify the decomposition process leading to the appearance of SrCu(OH)$\text{}_{4}$·H$\text{}_{2}$O, some hydroxycarbonates and Cu(OH)$\text{}_{2}$ on the surface of ceramics studied. At temperatures higher than 300ºC CuO reacts back with Sr(OH)$\text{}_{2}$. For the samples being in contact with atmospheric moisture this compound, deposited on a surface of SrCuO$\text{}_{2}$, decomposes to Sr$\text{}_{2}$Cu(OH)$\text{}_{6}$. The presence of the antiferromagnetic compounds Cu(OH)$\text{}_{2}$, CuO, and Cu$\text{}_{2}$[(OH)$\text{}_{2}$CO$\text{}_{3}$] in the samples can influence the results of magnetic measurements of the studied ceramics.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 3; 525-536
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electron Paramagnetic Resonance Study of Organic Radicals in Some Herbal Plants
    Autorzy:
    Krupska, A.
    Wojtowicz, E.
    Augustyniak-Jabłokow, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398973.pdf
    Data publikacji:
    2016-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.30.-v
    76.30.Rn
    Opis:
    In this work we show the impact of the roasting process on the properties of organic radicals in some herbal products added to cereal coffee. The EPR study shows the presence of radicals in dried herbal products, both natural and roasted. Changes in the relative intensity of the EPR signal and in the g-factor for unroasted and roasted plant material can be observed. This indicates to the recombination processes of radicals. Roasting process increases the number of radicals. The analysis of EPR spectra show that they consist of two Gaussian lines which indicate that there are at least two different kinds of radicals. The values of g-factor about 2 may be derived from a number of very different radicals. For this reason the identification of such radicals is not strictly possible.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 6; 1201-1204
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of daily yield of cows and date of first insemination on services per conception
    Wpływ wydajności dobowej krów i terminu pierwszej inseminacji na indeks inseminacji
    Autorzy:
    Sawa, A.
    Jankowska, M.
    Augustyniak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2603888.pdf
    Data publikacji:
    2018
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    daily milk yield
    cow
    insemination
    first lactation
    second lactation
    Źródło:
    Acta Scientiarum Polonorum. Zootechnica; 2018, 17, 1; 9-14
    1644-0714
    Pojawia się w:
    Acta Scientiarum Polonorum. Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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