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Wyszukujesz frazę "Morawski, D." wg kryterium: Autor

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    Tytuł:
    Kinetics of water oxygenation in pipe aerator
    Autorzy:
    Kalenik, M.
    Wichowski, P.
    Morawski, D.
    Chalecki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/101085.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
    Tematy:
    water purification plant
    water oxygenation
    co-current pipe aerator
    compressor
    jet pump
    Opis:
    The paper presents the results of investigations of the oxygen content in oxygenated water in a co-current pipe aerator with the diameter of 200 mm, with stainless steel Białecki rings with the diameter of 12 mm, for two cases: when the air is supplied by a compressor and when it is supplied by a jet pump. The oxygen content in the oxygenated water was assayed using an LDO oxygen sensor. The investigations of water oxygenation in the aerator were carried out during technical exploitation of the Scientific Research Water Station of Warsaw University of Life Sciences. The oxygen content O2 in the oxygenated water was measured for the set air flow rate Qp equal to 50, 100 and 150 dm3 ×h-1 and water flow rate Qw equal to 10, 15 and 20 m3 ×h-1 . During the tests, the temperature T of the air supplied to the aerator was also measured. The water temperature was constant during the tests and it was equal to 12°C. The oxygen content O2 in the oxygenated water and the temperature T of the air supplied to the aerator were measured every 10 seconds. For each air flow rate Qp and water flow rate Qw being set, three measurement series were carried out and the obtained results were averaged. The researches were aimed on the determination of the influence of air and water flow rate on the oxygen content in the water oxygenated in a pipe aerator with use of a compressor and a jet pump. In the measurement range being tested, the effectiveness of water oxygenation increased with rise in the flow rate of the supplied air and decreased with rise in the flow rate of the supplied water. The effectiveness of water oxygenation was higher if obtained by means of a jet pump than of a compressor.
    Źródło:
    Infrastruktura i Ekologia Terenów Wiejskich; 2017, II/2; 689-700
    1732-5587
    Pojawia się w:
    Infrastruktura i Ekologia Terenów Wiejskich
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Primary Electron Scattering in Co/Cu(110) Measured by Elastic and Loss Electrons
    Autorzy:
    Turko, D.
    Morawski, I.
    Nowicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400500.pdf
    Data publikacji:
    2013-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    91.60.Ed
    91.55.Nc
    61.05.jd
    Opis:
    Elastically backscattered electrons and electron energy losses were measured for the Co/Cu(110) system at different incidence angles of the primary electron beam to obtain the directional elastic peak electron spectroscopy and directional electron energy loss spectroscopy profiles. The measurements were performed for clean and covered Cu(110) by equivalent quantities of 3 ML and 5 ML of Co. The directional elastic peak electron spectroscopy profiles show a similar distribution of intensity maxima for Cu(110) and Co/Cu(110), which indicates the epitaxial growth of Co layers. The chemical sensitive signal of electron energy losses (Cu and Co 3 $p_{3//2}$) recorded as a function of the incidence angle of primaries is characterized by modulations which reflect the order within the first few atomic layers of the investigated sample. Therefore, in the case of directional electron energy loss spectroscopy both the chemical and structural information is obtained.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 1; 161-164
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Ex Situ $MgB_2$ Barrier and HIP on the $I_c$ Anisotropy in Double Core $MgB_2//Cu$ Wires
    Autorzy:
    Gajda, D.
    Morawski, A.
    Zaleski, A.
    Cetner, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535516.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Opis:
    The effect of large $I_{c}$ anisotropy reductions in $MgB_2//Cu$ sheathed wire is presented. The measurements of the critical current in rising magnetic field up to 14 T at 4.2 K were performed. Due to the application of the high isostatic pressure process to the copper sheathed $MgB_2$ wires with the ex situ $MgB_2$ homo barrier around the in situ core the anisotropy for such wires was very small and approached to less than 2% at magnetic field over 4 T. The presented geometry and technology show several advantages in their practical applications.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 1059-1061
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Nano-SiC Doping on the Superconducting Critical Parameters in $MgB_2$/Fe Wires and Tapes
    Autorzy:
    Gajda, D.
    Zaleski, A.
    Morawski, A.
    Kario, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813696.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.70.Ad
    74.25.Sv
    Opis:
    In this paper the results of critical current measurements for $MgB_2$ wires and tapes in iron sheath with and without nano-SiC doping are presented. We focus on power-in-tube processing technique, using both in situ and ex situ methods. In situ $MgB_2$ wires and tapes were fabricated from $MgH_2$ and B or Mg and B powders. The methods such as hydrostatic extrusion and rolling were used. The samples were annealed under high Ar gas pressure (hot isostatic pressing) at 750°C and 1.0 GPa for 40 min. It was found that critical current of $MgB_2$/Fe superconducting wire or tape with nano-SiC dopant increased in higher magnetic field values in comparison to pure $MgB_2$. A significant difference of $J_c$ in tapes made by in situ way from $MgH_2$ and Mg were found.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 371-374
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Performance of Hybrid Photolysis-DCMD and Photocatalysis-DCMD Systems Utilizing UV-C Radiation for Removal of Diclofenac Sodium Salt From Water
    Autorzy:
    Mozia, S.
    Darowna, D.
    Przepiórski, J.
    Morawski, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/779272.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    photocatalytic membrane reactor,
    direct contact membrane distillation
    photolysis
    photocatalysis
    diclofenac sodium salt
    Opis:
    The removal of a non-steroidal anti-inflammatory drug (NSAID) diclofenac sodium salt (DCF, C14H10Cl2NNaO2) from water in two hybrid systems coupling photolysis or photocatalysis with direct contact membrane distillation (DCMD) is presented. A UV-C germicidal lamp was used as a source of irradiation. The initial concentration of DCF was in the range of 0.005-0.15 mmol/dm3 and the TiO2 AeroxideŽ P25 loading (hybrid photocatalysis-DCMD) ranged from 0.05 to 0.4 g/dm3. Regardless of the applied hybrid system and the initial concentration of DCF, the model drug was completely decomposed within 4h of irradiation or less. Mineralization was less efficient than photodecomposition. In case of the hybrid photolysis-DCMD process the efficiency of TOC degradation after 5h of irradiation ranged from 27.3-48.7% depending on the DCF initial concentration. The addition of TiO2 allowed to improve the efficiency of TOC removal. The highest degradation rate was obtained at 0.3 gTiO2/dm3. During the process conducted with the lowest DCF initial concentrations (0.005-0.025 mmol/dm3) a complete mineralization was obtained. However, when higher initial amounts of DCF were used (0.05-0.15 mmol/dm3), the efficiency of TOC degradation was in the range of 82.5-85%. The quality of distillate was high regardless of the system: DCF was not detected, TOC concentration did not exceeded 0.7 mg/dm3 (1.9 mg/dm3 in permeate) and conductivity was lower than 1.6 žS/cm.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 1; 51-60
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Purely Electronic and Vibronic Fluorescence Excitation of Single Terrylene Molecules in a Naphthalene Crystal
    Autorzy:
    Banasiewicz, M.
    Dresner, J.
    Morawski, O.
    Wiącek, D.
    Kozankiewicz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1814019.pdf
    Data publikacji:
    2007-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.50.+d
    33.20.Kf
    33.50.Dq
    Opis:
    Fluorescence excitation spectra of spatially resolved single terrylene molecules in a naphthalene crystal were studied at 5 K as a function of exciting laser light intensity. The fully saturated fluorescence detection rate for purely electronic transition (0,0) was found to be about twice smaller than that for the two main vibronic components located 239 and 251 $cm^{-1}$ above. This relation is fulfilled when the triplet population rate $k_{23}$ is much weaker than the depopulation rate $k_{31}$. We propose that the weak fluorescence excitation lines observed at the frequencies of 38, 67, 97, and 145 $cm^{-1}$ correspond to nontotally symmetric low-frequency vibration modes of terrylene.
    Źródło:
    Acta Physica Polonica A; 2007, 112, S; S-85-S-94
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    TiO2 modified by ammonia as a long lifetime photocatalyst for dyes decomposition
    Autorzy:
    Choina, J.
    Dolat, D.
    Kusiak, E.
    Janus, M.
    Morawski, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/778832.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fotokataliza
    TiO2 modyfikowany azotem
    żywotność
    photocatalysis
    nitrogen-modified TiO2
    lifetime
    Opis:
    Ammonia-modified TiO2 (TiO2/N), prepared in a pressure reactor was used as the well- active and longlife photocatalyst for the azo dye (Reactive Red 198) decomposition. The effect of aeration and the different value of the pH of the reaction medium on the photocatalytic degradation of Reactive Red 198 in water has been investigated. It has been reported that the degradation is greatly influenced by the reaction pH and the faster decomposition of azo dye took place at pH 3.5. When the solution was acidic, a larger amount of azo dye on the positively charged surface of TiO2 photocatalysts was adsorbed. From the obtained results it can be seen that the effectiveness of the decolourisation of the solution was faster by using the nitrogen-modified TiO2.
    Źródło:
    Polish Journal of Chemical Technology; 2009, 11, 4; 1-6
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photocatalytic properties of transparent TiO2 coatings doped with neodymium
    Autorzy:
    Wojcieszak, D.
    Kaczmarek, D.
    Domaradzki, J.
    Mazur, M.
    Morawski, A. W.
    Janus, M.
    Prociów, E.
    Gemmellaro, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/779161.pdf
    Data publikacji:
    2012
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    TiO2
    neodymium
    photocatalysis
    wettability
    surface properties
    Opis:
    In this work photocatalytic properties of TiO2 thin fi lms doped with 8.51 at. % of Nd were described. The self-cleaning phenomenon of thin fi lms was discussed together with the structural, optical and surface properties of prepared thin fi lms. Transparent coatings based on titanium dioxide were manufactured by high-energy reactive magnetron sputtering process. Incorporation of Nd during sputtering process results in amorphous behavior, without a signifi cant infl uence on transparency and colour as compared to the undoped TiO2-rutile matrix. Nevertheless, doping with neodymium doubles the photocatalytic activity of the matrix due to higher quantity of photo-generated charge carriers and more effi cient mechanism of energy transfer.
    Źródło:
    Polish Journal of Chemical Technology; 2012, 14, 3; 1-7
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Superconducting and Microstructural Properties of (Mg+2B)+MgB$\text{}_{2}$/Cu Wires Obtained by High Gas Pressure Technology
    Autorzy:
    Kario, A.
    Morawski, A.
    Głowacki, B. A.
    Łada, T.
    Smaga, M.
    Diduszko, R.
    Kolesnikov, D.
    Zaleski, A. J.
    Kondrat, A.
    Gajda, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047331.pdf
    Data publikacji:
    2007-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    84.71.Mn
    Opis:
    In order to improve the overall critical current characteristics of Cu sheathed in situ MgB$\text{}_{2}$ wires a special architecture of the wire, and processing parameters were used. The study presents the influence of the ex situ MgB$\text{}_{2}$ chemical barrier between ex situ core and Cu, suppressing the reaction of Cu with Mg. Wires, doped with 10 at.% SiC of 18 nm average grain size, were fabricated from MgH$\text{}_{2}$ and B or from Mg and B powders, using the powder-in-tube method. The methods of rotary swaging or drawing were used as the alternating wire-forming processes. The samples were annealed under high Ar gas pressure (hot isostatic pressing) at 750ºC and 1.0 GPa for 15 and 30 min. A significant difference in Cu distribution across the wires for a long and short time of sintering was observed. The formation of microstructure in the powder-in-tube process and the relationship between the microstructure and critical current density J$\text{}_{c}$ values, are discussed in this paper.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 5; 693-703
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic resonance study of co-modified (Co,N)-TiO2 nanocomposites
    Autorzy:
    Guskos, N.
    Zolnierkiewicz, G.
    Guskos, A.
    Typek, J.
    Berczynski, P.
    Dolat, D.
    Mozia, S.
    Aidinis, C.
    Morawski, A. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/146542.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    nanocomposites
    titanium dioxide
    ferromagnetic resonance
    Opis:
    Three nCo,N-TiO2 nanocomposites (where cobalt concentration index n = 1, 5 and 10 wt %) were prepared and investigated by magnetic resonance spectroscopy at room temperature. Ferromagnetic resonance (FMR) lines of magnetic cobalt agglomerated nanoparticle were dominant in all registered spectra. The relaxation processes and magnetic anisotropy of the investigated spin system essentially depended on the concentration of cobalt ions. It is suggested that the samples contained two magnetic types of sublattices forming a strongly correlated spin system. It is suggested that the existence of strongly correlated magnetic system has an essential infl uence of the photocatalytic properties of the studied nanocomposites.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 1; 411-416
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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