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    Wyświetlanie 1-6 z 6
    Tytuł:
    The effect of undecanones and their derivatives on tumor angiogenesis and VEGF content
    Autorzy:
    Gibka, J
    Wasiutynski, A.
    Skopinska-Rozewska, E.
    Siwicki, A.K.
    Chorostowska-Wynimko, J.
    Sommer, E.
    Mazurkiewicz, M.
    Glinski, M.
    Skurzak, H.
    Wojcik, R.
    Jung, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/31734.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mice
    mouse
    undecan-x-one
    derivative
    angiogenesis
    tumour
    VEGF zob.vascular endothelial growth factor
    enantiomer
    histological examination
    vascular endothelial growth factor
    sarcoma cell
    Opis:
    The in vivo effects of some derivatives of aliphatic ketones (2-undecanone, 3-undecanone, 4-undecanone and their derivatives) on L-l sarcoma tumor angiogenesis and VEGF content were studied in Balb/c mice. Mice that inhaled 10% solution of 3-undecanone(3-on) or 1% solution of 2-undecanone propylene acetal (Acpr2) for 3 days after tumor cells implantation, presented lower neovascular response measured by tumor-induced cutaneous angiogenesis test (TIA) and lower tumor VEGF content in 5-days tumors, than non-inhaled controls. Other substances presented various effects on tumor VEGF concentration and angiogenesis. Histological examination of lesions collected from mice inhaled Acpr2, or non-inhaled controls, revealed small diffused areas of necrosis in the former group. In both groups, slight to moderate inflammatory infiltrations were seen at the tumor's margin. In Acpr2 group, there were less small blood vessels at tumor's margin than in the control group.
    Źródło:
    Polish Journal of Veterinary Sciences; 2010, 13, 1; 105-115
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Same river same rules? – Administrative barriers in the Danube countries
    Autorzy:
    Pfoser, S.
    Jung, E.
    Putz, L.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2140951.pdf
    Data publikacji:
    2018
    Wydawca:
    Fundacja Centrum Badań Socjologicznych
    Tematy:
    inland waterway transport
    administrative processes
    lean management
    Danube River
    Opis:
    The Danube River Basin is shared by 19 countries, which makes it the world’s most international river basin. More than 81 million people of different cultures and languages live in the Danube Basin and they all are interconnected through the widely ramified water system of the Danube. The cultural variety is not only a valuable attribute of this region, but it also causes barriers related to the transport of goods and passengers on the Danube waterway and its navigable tributaries. The abundant existence of administrative barriers in Europe limits the economic and environmental potentials of inland waterway transport (IWT) as a sustainable mode of transport. These administrative barriers consist for example in reporting requirements that vary considerably among fairway authorities and Danube countries. Most often, reports or data provided cannot be re-used across countries or is not available requiring additional input or additional reporting activities by the barge operator. The objective of this paper is to identify administrative barriers for IWT on the Danube and develop solutions for improved procedures and processes. Data is collected from a dense network of stakeholders operating along the Danube. National focus groups were held to analyse the procedures and administrative processes in inland waterway transport and identify barriers. Further, an online-survey has been set up to collect data. Potential solutions are developed in a cooperative way together with involved operators and authorities. The philosophy of lean administration suggests that non-value added activities (“waste”) must be identified in a first step to make processes more efficient. A diverse number of non-value added administrative barriers were therefore identified in the countries along the Danube. Afterwards, Port Community Systems are introduced as a possible solution to overcome administrative barriers.
    Źródło:
    Journal of Sustainable Development of Transport and Logistics; 2018, 3, 3; 27-37
    2520-2979
    Pojawia się w:
    Journal of Sustainable Development of Transport and Logistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mirror surface finishing of hardened die steel by high-Power ultrasonic elliptical vibration cutting
    Autorzy:
    Jung, H.
    Shamoto, E.
    Ueyama, T.
    Hamada, S.
    Xu, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/100101.pdf
    Data publikacji:
    2016
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    elliptical vibration cutting
    mirror surface finishing
    hardened steel
    Opis:
    Ultrasonic elliptical vibration cutting has recently been utilized in industry for finishing of various precision parts such as mirror surface finishing and precision micro machining of dies and molds. However, its application has been limited to high-cost ultra-precision machining, where depth of cut is typically in a range from a few micrometers to several tens of micrometers due to power limitation of the vibration device. To expand its application to low-cost mirror surface finishing with ordinary machining facilities, a high-power elliptical vibration device was developed in this research. The elliptical vibration cutting of hardened die steel was examined by applying the developed high-power elliptical vibration device with single crystalline diamond tools. Pick feed was kept to be 0.02 mm to obtain mirror quality surfaces, while depth of cut was increased up to 0.4 mm to verify performance of the high-power elliptical vibration cutting. By analyzing the experimental results, it was clarified that mirror surface finishing of the hardened die steel can be achieved at the large depth of cut with practically acceptable tool life.
    Źródło:
    Journal of Machine Engineering; 2016, 16, 1; 5-14
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Current Distribution in Y-Ba-Cu-O Superconducting Microbridges Containing Π-Shaped Channel for Easy Vortex Motion
    Autorzy:
    Sulcas, J.
    Steponaviciene, L.
    Jukna, A.
    Jung, G.
    Plausinaitiene, V.
    Abrutis, A.
    Gong, M.
    Sobolewski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1505543.pdf
    Data publikacji:
    2011-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.78.-w
    74.25.Sv
    74.25.F-
    74.25.Wx
    Opis:
    A mixed state in dc-biased thin films of II-type superconductors realizes the Abrikosov magnetic vortices/antivortices, which are the result of the current-self magnetic field penetration into the film at temperatures lower than its critical temperature $T_{c}$. A nucleation of vortices/antivortices at the superconducting film's edges, their motion perpendicular to the direction of biasing current, and the annihilation in the film's center originates from a current dissipation in the superconductor and expresses itself in experiments as a dc voltage. This work reports on the results of simulation of current density in a 50 μm wide, 100 μm long, and 0.3 μm thick $YBa_2Cu_3O_{7 - x}$ microbridges containing Π-shaped 5 μm wide single channel of easy vortex motion fabricated by means of laser-writing technique. Analyzing a two-dimensional-net of resistors and assuming that, due to the Meissner-Ochsenfeld effect, the magnetic flux penetration into superconducting film is nonlinear, we demonstrate that presence of a Π-shaped channel causes a non-homogeneous distribution of current in the microbridge.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 2; 183-185
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation Details of Vortex Density in Laser-Written Π-Shaped Channel of YBCO Bridge by Means of I-V Dependences
    Autorzy:
    Steponaviciene, L.
    Sulcas, J.
    Jukna, A.
    Jung, G.
    Plausinaitiene, V.
    Abrutis, A.
    Maneikis, A.
    Gong, M.
    Sobolewski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1505530.pdf
    Data publikacji:
    2011-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.78.-w
    74.25.Sv
    74.25.F-
    74.25.Wx
    Opis:
    A current-self-induced magnetic field $H_{j}$, such that $H_{c1} < H_{j} < H_{c2}$ at $T < T_{c}$, penetrates a thin-film, type-II superconductor forming the Abrikosov magnetic vortex-antivortex pairs in the film's areas of weakest superconductivity. Our atomic force microscopy and scanning tunneling microscopy images confirm that in 50 μm wide, 100 μm long and 0.3 μm thick $YBa_2Cu_3O_{7 - x}$ superconducting devices magnetic flux penetrates first into a 5 μm wide, Π-shaped and partially deoxygenated (x ≈ 0.2) channel for easy vortex motion. When the Lorentz force overcomes pinning force in the channel, the flux starts to move and its drift dissipates energy inducing dc voltage. This work reports on the density of coherently moving vortices along the channel vs. temperature in range from $0.93T_{c}$ to $0.97T_{c}$. Our simulations show that the vortex density vs. temperature dependence extracted from I-V measurements of our devices follows the temperature dependence of magnetic field penetration depth and the coherence length of the superconductor.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 2; 180-182
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plasmon Enhancement of Fluorescence in Single Light-Harvesting Complexes from em Amphidinium carterae
    Autorzy:
    Bujak, Ł.
    Piątkowski, D.
    Mackowski, S.
    Wörmke, S.
    Jung, C.
    Bräuchle, C.
    Agarwal, A.
    Kotov, N.
    Schulte, T.
    Hofmann, E.
    Brotosudarmo, T.
    Scheer, H.
    Govorov, A.
    Hiller, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807594.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.80.Nj
    87.14.E-
    87.64.M-
    Opis:
    We show that single peridinin-chlorophyll a-protein light-harvesting complexes from dinoflagellate Amphidinium carterae placed near to silver nanoparticles show strongly enhanced fluorescence emission. Single molecule spectroscopy experiments performed at room temperature point toward an enhancement of more than an order of magnitude for optimal conditions. Irrespective of the enhancement, we observe no effect of the metal nanoparticle on the fluorescence emission energy of the complex. This result provides a way to control the optical properties of biomolecules via plasmon excitations in metal nanoparticles.
    Źródło:
    Acta Physica Polonica A; 2009, 116, S; S-22-S-25
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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