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    Wyświetlanie 1-7 z 7
    Tytuł:
    Influence of titanium dioxide modification on the antibacterial properties
    Autorzy:
    Rokicka, P.
    Markowska-Szczupak, A.
    Kowalczyk, Ł.
    Kowalska, E.
    Morawski, A. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/778569.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    antibacterial properties
    Escherichia coli K12
    modified photocatalysts
    titanium dioxide
    visible-responsive photocatalysts
    Opis:
    Antibacterial properties of 15 titania photocatalysts, mono- and dual-modified with nitrogen and carbon were examined. Amorphous TiO2 , supplied by Azoty Group Chemical Factory Police S.A., was used as titania source (Ar-TiO2 , C-TiO2 , N-TiO2 ;2 and N,C-Ti2 2 calcined at 300°C, 400°C, 500°C, 600°C, 700°C). The disinfection ability was examined against Escherichia coli K12 under irradiation with UV and artificial sunlight and in dark conditions. It has been found the development of new photocatalysts with enhanced interaction ability with microorganisms might be a useful strategy to improve disinfection method conducted under artificial sunlight irradiation. The efficiency of disinfection process conducted under artificial sunlight irradiation with carbon (C-TiO2 ) and carbon/nitrogen (N,C-TiO2 ) photocatalysts was similar as obtained under UV irradiation. Furthermore, during dark incubation, any toxicity of the photocatalyst was noted.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 4; 56-64
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrogen Peroxide as a High Energy Compound Optimal for Propulsive Applications
    Autorzy:
    Rarata, G.
    Rokicka, K.
    Surmacz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/358739.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    hydrogen peroxide
    HTP
    explosibility
    detonability
    monopropellant
    oxidizer
    propulsion
    Opis:
    This paper presents the authors’ experience in the field of the safe preparation and utilisation of HTP (98%+), a storable propellant that is finding use in various engineering applications. Brief characterisations of the material as well as examples of its potential use within relevant industries are provided. Additionally, some of the existing data and current research are included to demonstrate the full potential of this material which meets most of the needs of the propulsion industry. The laboratory technique for obtaining the substance that has been developed recently at the Institute of Aviation is briefly described. Utilisation of the method based on a special glass apparatus allows reproducible amounts of the substance to be obtained with relatively little risk.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 3; 778-790
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First record of brown colouration of Atlantic cod (Gadus morhua, L.) from the North Sea
    Autorzy:
    Rybczyk, A.
    Czerniejewski, P.
    Rokicka-Praxmajer, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/47816.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Atlantic cod
    Gadus morhua
    brown colouration
    skin colour
    coastal zone
    North Sea
    Źródło:
    Oceanologia; 2014, 56, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A home away from home: a meiobenthic assemblage in a ships ballast water tank sediment
    Autorzy:
    Radziejewska, T.
    Gruszka, P.
    Rokicka-Praxmajer, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/48228.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    Sopot
    meiobenthos
    marine organism
    bottom
    biological invasion
    dispersal
    invasion
    conference
    Baltic Sea
    sediment
    meiobenthic animal
    water column
    Opis:
    The world-wide research on ship-aided dispersal of marine organisms and invasions of non-indigenous species focuses primarily on the plankters, which show the greatest potential for invading new areas and establishing viable populations in them, either in the water column (holoplankton) or on the bottom (meroplanktonic larvae of benthic species settling on the sea floor). As meiobenthic animals usually lack a pelagic larval stage in their life cycle, no biological invasion study has, to our knowledge, ever specifically targeted marine transport as a means of meiofaunal dispersal. Here we present a set of data showing that the sediment deposited in a ship’s ballast water tank does support a viable meiobenthic assemblage. We examined 0.015-dm3 aliquots of a 1 dm3 sample from a c. 1.5-cm thick layer of sediment residue in the ballast tank of MS Donnington, brought to the ‘Gryfia’ Repair Shipyard in Szczecin (Poland). The samples were found to contain representatives of calcareous Foraminifera, hydrozoans, nematodes, turbellarians, harpacticoid copepods and their nauplii, and cladocerans, as well as meiobenthic-sized bivalves and gastropods. Nematodes proved to be the most constant and most numerous component of the assemblage. The sediment portions examined revealed the presence of 1–11 individuals representing 11 marine nematode genera. The viability of the meiobenthic assemblage was evidenced by the presence of ovigerous females of both nematodes and harpacticoids. Survival of the meiobenthos in shipborne ballast tank sediment residues may provide at least a partial explanation for the cosmopolitan distribution of meiobenthic taxa and may underlie the successful colonisation of new habitats by invasive meiofaunal species.
    Źródło:
    Oceanologia; 2006, 48, S
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Links between root carbohydrates and seasonal pattern of soil microbial activity of diverse European populations of Pinus sylvestris grown in a provenance plantation
    Autorzy:
    Kieliszewska-Rokicka, B
    Oleksyn, J.
    Zytkowiak, R.
    Reich, P.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/56717.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Scotch pine
    soil dehydrogenase
    Polska
    microbial activity
    forest stand
    European population
    carbohydrate
    soluble carbohydrate
    population
    soil microorganism
    root
    mineral soil
    starch
    seasonal pattern
    soil
    Pinus sylvestris
    plantation
    dehydrogenase activity
    aboveground biomass
    Opis:
    Activity of soil dehydrogenase (DHA) was measured in the mineral soil in a forest stand of 15 to 16-year-old Scots pine (Pinus sylvestris L.) from geographically diverse populations, as an indicator of biological activity of soil microorganisms, in a provenance experiment in Poland. The pine populations originated from six European countries (Sweden, Russia, Latvia, Poland, Germany, France) and differed widely in aboveground biomass and productivity. Soil DHA during two growing seasons showed pronounced seasonal variability, which was significantly related to the fine root concentration of nonstructural carbohydrates. Higher DHA was found in soil under canopies of the central and southern European populations than in those from more northern parts of the Scots pine range. Significant positive correlation between soil DHA and aboveground tree biomass suggest that these patterns most likely resulted from differences in carbon dynamics and productivity among populations.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unintended “biological cargo” of ships entering the River Odra estuary: assemblages of organisms in ballast tanks
    Autorzy:
    Gruszka, P.
    Rokicka-Praxmajer, J.
    Cupak, J.
    Radziejewska, T.
    Wolska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/359821.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    ballast tank water
    ballast tank sediment
    alien species
    Odra River estuary
    Szczecin harbour
    Opis:
    Water and sediment in ships’ ballast tanks provide habitats for various organisms, and thus facilitate alien species introductions. Ballast tank water and sediment of 19 ships docked in the GRYFIA Szczecin Ship Repair Yard (Szczecin, Poland) located in an area connected with the River Odra estuary (Southern Baltic), were sampled in 2009–2011 to find out if the ships could be vectors of species introductions to the estuary, already known for the presence of non-indigenous taxa. This study showed the ballast water of the ships examined to house rotifers, copepods, cladocerans, and bivalve and cirriped larvae – common constituents of zooplankton assemblages in coastal waters. The ballast tank sediment supported meiobenthic foraminiferans, nematodes, harpacticoid copepods, turbellarians, bivalves, polychaetes, and chironomid and cirriped larvae. It is not possible at this stage to judge what meiofaunal taxa constitute an alien component in the estuary biota. Macrobenthos in the ships’ ballast tank sediment examined was represented mainly by nereid polychaetes. Although the unintended “biological cargo” examined proved quite diverse and abundant, it contained few identified alien taxa. It does not seem likely than any of them could pose a threat of a biological invasion in the River Odra estuary. However, numerous species remained unidentified, and therefore assessment of the risk of alien species introduction and invasion contains a large measure of uncertainty. On the other hand, the risk as such remains, since the density of ballast water-borne organisms in all ships exceeded the allowed limits.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2013, 33 (105); 22-29
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ atermicznych właściwości mikrofalowego promieniowania elektromagnetycznego na intensyfikację procesu fermentacji metanowej ścieków mleczarskich
    Impact of athermic properties of the electromagnetic microwave radiation on the process of anaerobic digestion of dairy wastewater
    Autorzy:
    Szwarc, D.
    Zieliński, M.
    Nicewicz, P.
    Szwarc, K.
    Rokicka, M.
    Dębowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/399493.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    fermentacja metanowa
    promieniowanie mikrofalowe
    ścieki mleczarskie
    biogaz
    anaerobic digestion
    microwave radiation
    dairy wastewater
    biogas
    Opis:
    Celem badań było określenie wpływu elektromagnetycznego promieniowania mikrofalowego na aktywność mikroorganizmów prowadzących proces fermentacji metanowej ścieków mleczarskich. Substratem wykorzystywanym w badaniach były modelowe ścieki mleczarskie, spreparowane na bazie odtłuszczonego mleka w proszku. Osad beztlenowy, na potrzeby przeprowadzenia badań, pobierany był z reaktora beztlenowego pracującego w warunkach mezofilowych, a następnie ogrzewano go za pomocą promieniowania mikrofalowego (wariant 1) lub ogrzewania konwencjonalnego w szafie termostatycznej (wariant 2). Badania podzielone były na dwa etapy, których kryterium podziału była temperatura procesu. Etap pierwszy przewidywał określenie wpływu promieniowania mikrofalowego w temperaturze 38 °C, natomiast etap drugi w temperaturze 58 °C. Wyniki badań wykazują, że wykorzystanie mikrofalowego pola elektromagnetycznego może wpływać na wzrost ilości produkowanego biogazu. Ponadto obróbka osadu, przy pomocy elektromagnetycznego pola mikrofalowego, intensyfikuje usuwanie związków organicznych w procesie fermentacji metanowej.
    The aim of this study was to determine the effect of electromagnetic microwave radiation on the activity of micro-organisms for the process of anaerobic digestion of dairy sewage. The substrate used in the study was a model dairy wastewater crafted based on skimmed milk powder. The sludge was necessary for the anaerobic testing were taken from the anaerobic reactor operated at mesophilic conditions, then it was heated by microwave irradiation (Option 1) or heating in a conventional thermostatic cabinet (Option 2). The study was divided into two stages, where the criterion of division was the temperature of the process. A first step provided to determine the effect of microwave irradiation at 38 °C, and the second step at 58 °C. The studies show that the use of microwave electromagnetic field may affect an increase of the biogas produced. Furthermore, sludge treatment using electromagnetic microwave field enhances the removal of organic compounds in the methane fermentation process.
    Źródło:
    Inżynieria Ekologiczna; 2017, 18, 2; 149-158
    2081-139X
    2392-0629
    Pojawia się w:
    Inżynieria Ekologiczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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