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    Wyświetlanie 1-6 z 6
    Tytuł:
    Przemiany metanu w środowiskach torfowych
    Transformation of methane in peatlands environments
    Autorzy:
    Stępniewska, Z.
    Goraj, W.
    Kuźniar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1316279.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    torfowiska
    metan
    emisja gazow
    produkcja metanu
    bakterie metanotroficzne
    peatlands
    methane
    methanotrophic bacteria
    Opis:
    Wetlands and particularly peatlands are the main natural source of methane. Data indicate that 10–45% of methane emission comes from these sources. Methane emission from wetlands is the result of the balance between methanogenesis and methanotrophic processes and is actively affected by the wetland plant community composition. There are many factors affecting the balance of CH4: for instance, vegetation has a strong effect on CH4 emissions from wetland ecosystems by influencing methane production, consumption and transport in the soil. The effects of plants on methane fluxes may be mediated by: molecular diffusion, internal transport through plant aerenchyma tissues and ebullition. Methane is formed in the process of methanogenesis under anaerobic conditions. It may then be emitted into the atmosphere directly from the soil or by internal transport through the plant. Alternatively, it may undergo methane oxidation by methanotrophic bacteria, both free-living in the root zone and associated with the host plant in symbiosis. Sphagnum moss is of particular importance for this processes as it contains methanotrophic bacteria in its endophytic system. Methanotrophic bacteria live inside the dead hyaline cells or on the surface of Sphagnum leaves and are able to oxidise methane produced in the soil during methanogenesis, making peatlands a natural biofilter for methane, one of the main greenhouse gases.
    Źródło:
    Leśne Prace Badawcze; 2014, 75, 1; 101-110
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of plant composition on methane emision from Moszne peatland
    Autorzy:
    Goraj, W
    Kuźniar, A.
    Urban, D.
    Pietrzykowska, K
    Stępniewska, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/123646.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    methane
    methanotrophic bacteria
    peatland vegetation
    Opis:
    Methane is the second most important man-made greenhouse gas after carbon dioxide. For more than the last 20 years the increase of the rate of CH4 emission has been varying dramatically each year. This trend is common worldwide, though in different parts of the world unevenly intense, conditioned by the amount of emissions from natural and anthropogenic sources. Peatland ecosystems are one of the natural methane emitters, responsible for about 24% of the total CH4 emissions. Methane emission from wetlands is the balance between the processes of methanogenesis and methanotrophy with an active role of wetlands plants composition. Participation of vegetation in the reduction the emissions by 30-35% was confirmed. Association of methanotrophic bacteria with plants has been already recognized by Raghoebarsing and colleagues, who showed that methanotrophic bacteria, as endosymbionts and epibionts, live both inside and outside the cells of Sphagnum sp. The main aim of this study was to estimate methane emissions from Moszne peatland, dominated by: Sphagnum sp., Eriophorum vaginatum, Carex nigra and Vaccinium uliginosum.
    Źródło:
    Journal of Ecological Engineering; 2013, 14, 1; 53-57
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in atmospheric CH4, O3, NO2, SO2 concentration dynamics in Lublin in years 2007-2009
    Dynamika zmiany stężenia atmosferycznego CH4, O3, NO2, SO2 w Lublinie w latach 2007-2009
    Autorzy:
    Stepniewska, Z.
    Goraj, W.
    Sochaczewska, A.
    Kuzniar, A.
    Pytlak, A.
    Malec, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/35774.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Changes in atmospheric concentrations of gases including CH4, O3, NO2, SO2 are one of the most current issues, due to the observed global warming. The concentration of atmos-pheric gases is being monitored by satellite measurements and also by tropospheric air monitoring stations located at various geographical latitudes. Polish law and EU Directives determine the limit values of concentrations of air pollutants established for the protection of human health: sulphur dioxide, nitrogen dioxide, benzene, carbon monoxide, ozone, PM10, lead, arsenic, cadmium, nickel and benzo(a)pyrene. The basic equipment of monitoring stations does not include methane analys-ers. Our monitoring station is one of two stations in Poland with a CH4 analyser. The sampling intake of the KUL monitoring station is located on the wall oriented perpendicularly to the Lublin-Krakow road, c.a. 41.5 m from this very frequently used road. The research, conducted for three years beginning from 2007 until 2009, showed significant variations in greenhouse gases (GHG) concentrations. The increase in mean annual methane concentration noted at the KUL station was 1.4 % for the years 2007-2008 and 1.7% for 2008-2009. The growth rate of ozone mixing ratio was 29% in the period of 2007-2009. Annual mean values of NO2 concentration in 2007 were 50.3% higher than in 2009. The growth rate of SO2 mixing ratio exceeded 65% between 2007 and 2008. The concentration levels of pollutants in the air were related directly with the emission of pollutants to the atmosphere and with the meteorological conditions.
    Zmiany stężenia gazów takich jak: CH4, O3, NO2, SO2 są jednym z najbardziej aktualnych problemów ze względu na obserwowane globalne ocieplenie. Stężenie tych gazów w atmosferze monitorowane jest satelitarnie lub poprzez stacje monitoringu powietrza troposferycznego zlokalizowane na różnych szerokościach geograficznych. Ustawodawstwo polskie i dyrektywy Unii Europejskiej określają wartości dopuszczalne stężenia zanieczyszczeń powietrza określone w celu ochrony ludzkiego zdrowia: ditlenek siarki, ditlenek azotu, benzen, tlenek węgla, ozon, PM10, ołów, arsen, kadm, nikiel i benzo(a)piren. Podstawowe wyposażenie stacji monitoringu nie zawiera analizatorów metanu. Stacja KUL jest jedną z dwóch stacji w Polsce posiadającą analizator CH4. Czerpnia prób gazowych w stacji monitoringu KUL zlokalizowana jest w odległości około 41,5 m od drogi krajowej Lublin-Kraków. Badania prowadzone przez trzy lata począwszy od 2007 do 2009 roku wykazują znaczne różnice w stężeniu analizowanych gazów cieplarnianych (GHG). Odnotowany w stacji monitoringu KUL wzrost średniej rocznej wartości stężenia metanu wynosił w latach 2007-2008 1,4%, w latach 2008-2009 1,7%. Wzrost stężenia ozonu w analizowanym okresie czasu utrzymywał się na poziomie 29%. Średnie roczne wartości stężenia NO2 w roku 2007 były o 50% wyższe niż w roku 2009. Dynamika zmian stężenia SO2 w latach 2007 i 2008 przekroczyła 65%. Poziom stężenia badanych zanieczyszczeń wynikał bezpośrednio z ich emisji do atmosfery oraz z warunków meteorologicznych.
    Źródło:
    Acta Agrophysica; 2014, 21, 3
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of fluridone on accumulation of carotenoids, flavonoids and phenolic acids in ripening tomato fruit
    Autorzy:
    Wiczkowski, W.
    Góraj-Koniarska, J.
    Saniewski, M.
    Horbowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/12689671.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    plant cultivation
    tomato
    Lycopersicon esculentum
    fruit ripening
    carotenoid
    flavonoids
    phenolic composition
    phenolic acid
    fluridone
    Opis:
    We examined the response of maturing tomato fruit exposed for 7 days to fluridone (1-methyl-3-phenyl-5-[3-trifluoromethyl(phenyl)]-4(1H)-pyridinone). Fluridone was applied in lanolin paste in the form of a 2–3 mm wide strip from the top to the base of the fruit. As a control, a similar stripe of lanolin was applied in the same way on the opposite side of the same fruit. The content of major carotenoids, as well as flavonoids, and free and bound phenolic acids were determined using a HPLC and HPLC-MS-MS methods. Fluridone almost completely blocked the biosynthesis of lycopene and substantial declined content of ß-carotene and lutein in the tomato fruit. The fluridone caused a decreased content of quercetin, rutin and naringenin, and increased level of epicatechin. The herbicide did not affect the content of p-coumaric acid, but reduced the level of caffeic acid, both free and ester form, and declined the content of free ferulic and chlorogenic acids. Changes in phenolics composition observed for the first time indicate that fluridone interferes with the biosynthesis of further products of the metabolism of p-coumaric acid, both flavonoids and phenolic acids.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 6; 39-46
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of fluridone on the composition of fatty acids and other properties of tomato fruits
    Autorzy:
    Goraj-Koniarska, J.
    Wiczkowski, W.
    Debski, H.
    Saniewski, M.
    Horbowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192105.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    fluridone
    tomato fruit
    fatty acids
    proline
    proteins
    MDA
    Opis:
    The effects of fluridone on the content and composition of fatty acids and some other properties of tomato fruits during a 14-day period of ripening were studied. Mature green tomato fruits were used for the experiments. Fluridone at a 1.0% concentration in lanolin paste was applied as a 2-3 mm stripe from the top to the base of a tomato fruit, and a stripe of lanolin was applied in the same way on the opposite side of the frui as control. After 14 days of the experiment, the treated (yellow) and untreated (red) halves of the tomato were separately freeze-dried and powdered before analysis. Determination of the profile and content of fatty acids was carried out in a micro-HPLC-MS/MS system including a 5600 QTOF mass spectrometer. Fatty acids were identified, based on retention times of available standards and the MS/MS spectra. The degree of lipid peroxidation, DPPH radical scavenging activity, proline and soluble protein content were determined using spectrophotometric methods. The use of fluridone did not cause significant changes in the content of unbound fatty acids, although there was a tendency to increased amounts of unsaturated acids. Concerning total fatty acids, the use of fluridone significantly increased the ratio of oleic acid to stearic, as well as the ratio of total unsaturated acids to saturated acids in the treated pericarp of tomato fruits. Fluridone had not effect on the content of proline, total phenolic acids, MDA and antioxidant activity, but inhibited soluble protein accumulation and enhanced the content of total flavonoids.
    Źródło:
    Journal of Elementology; 2020, 25, 3; 951-960
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elicitation of anthocyanin production in roots of Kalanchoe blossfeldiana by methyl jasmonate
    Autorzy:
    Goraj-Koniarska, J.
    Stochmal, A.
    Oleszek, W.
    Moldoch, J.
    Saniewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/19687.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The influence of methyl jasmonate on anthocyanin accumulation in roots of Kalanchoe blossfediana plants was studied. Methyl jasmonate (JA-Me), at a concentration of 5.0 to 40.0 mg.l-1, substantially increased anthocyanin accumulation in roots of intact plants, when it was applied as a solution under natural light conditions. The production of anthocyanin depended on the concentration of methyl jasmonate and the age of the plant. The stimulatory effect was higher in older plants of K. blossfeldiana than in younger ones. When leaves were removed methyl jasmonate slightly stimulated anthocyanin accumulation compared with intact plants. The obtained results indicate that leaves are necessary for the anthocyanin accumulation in the roots. In isolated roots methyl jasmonate did not affect the accumulation of anthocyanins in light conditions. Seven anthocyanins were documented in the roots of control plants and 8 anthocyanins in the roots of JA-Me treated ones. JA-Me increased the level of anthocyanins in roots of old K. blossfeldiana plants 6.8, 6.0 and 3.6-folds, after 4, 8 and 14-days of treatment, respectively.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2015, 57, 1
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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