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    Wyświetlanie 1-11 z 11
    Tytuł:
    The influence of train-induced ground motion in assessments of dynamic impact on structures
    Intensywność drgań podłoża gruntowego spowodowanych ruchem pociągów w rejonie dworca kolejowego Warszawa-Rembertów w świetle klasyfikacji normowych
    Autorzy:
    Nielepkowicz, K.
    Bąkowska, A.
    Maślakowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/962260.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ruch kolejowy
    skala wpływów dynamicznych
    intensywność drgań
    podłoże gruntowe
    fala powierzchniowa
    norma szwajcarska
    vibration intensity
    rail traffic
    dynamic effects scale
    subsoil
    surface wave
    Swiss standard
    Opis:
    In this study, the issue of intensity of cargo train-induced soil vibrations is presented. Oscillations were measured in Warsaw-Rembertow location with application of set of seismic receivers. The analysis concerns the ground vibration differentiation issue, depending on considered direction of oscillation propagation plane. Statistic distribution of vibration intensity for directions in 3-D space were done. The issue of potential effect on engineering structures of recorded vibrations was raised. The impact based on Scale of Dynamic Effects standard was estimated in the article. Vibration intensity results were also compared with classification according to the Swiss Standard.
    Jednym z najbardziej znaczących spośród antropogenicznych źródeł drgań, generowanych w obrębie obszarów zurbanizowanych, jest transport szynowy. Przenoszenie energii w postaci wibracji podłoża zachodzi głównie poprzez propagację fal powierzchniowych. Niniejsze opracowanie dotyczy pomiarów drgań podłoża, indukowanych przejazdem pociągów towarowych w rejonie dworca kolejowego Warszawa-Rembertów. Celem przeprowadzonych badań było określenie intensywności tych drgań, poprzez obliczenie ich amplitudy, przyspieszenia oraz częstotliwości. Przeprowadzone analizy dotyczyły przejazdów dwóch pociągów towarowych, przemieszczających się w różnej odległości względem wytyczonej linii pomiarowej.
    Źródło:
    Archives of Civil Engineering; 2018, 64, 4/II; 49-63
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Variability of horizontal hydraulic conductivity of fen peats from Eastern Poland in relation to function of peatlands as a natural geological barriers
    Autorzy:
    Rydelek, P.
    Bąkowska, A.
    Zawrzykraj, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060274.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    hydraulic conductivity
    natural geological barriers
    peat
    valley bog
    Opis:
    This paper presents the test results of horizontal hydraulic conductivity (k) of fen peats from eastern Poland. Three fen peatlands in the Lubartów Plateau (3 objects marked as LP1, LP2 and LP3) and two in the Siedlce Plateau (2 objects marked as SP1 and SP2) have been selected. Studied objects represent valley bogs type and are similar in peat thickness, but different in the occupied area. They are also vary in terms of botanic compositions and basic physical and chemical parameters of peats. The BAT permeameter was used to in-situ measurements of horizontal hydraulic conductivity. Horizontal hydraulic conductivity of studied peats varies from 1.3×10-8 m/s to 1.1×10-6 m/s. The lowest values of horizontal hydraulic conductivity were observed for silted (high-ash) carbonate peats and amorphous or pseudo-fibrous peats, while the highest values were observed for unsilted (low-ash) non-carbonate peats of fibrous structure. The analysis of variability of horizontal hydraulic conductivity showed that in each case the lowest values were observed for the bottom of the studied profile. The study allowed to indicate the specific areas within the peatlands differing in permeability and identify the role of individual objects as natural geological barriers.
    Źródło:
    Geological Quarterly; 2015, 59, 2; 426--432
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stress-strain behaviour analysis of Middle Polish glacial tills from Warsaw (Poland) based on the interpretation of advanced field and laboratory tests
    Autorzy:
    Bąkowska, A.
    Dobak, P.
    Gawriuczenkow, I.
    Kiełbasiński, K.
    Szczepański, T.
    Trzciński, J.
    Wójcik, E.
    Zawrzykraj, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/139030.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    glacial tills
    Warsaw
    compressibility
    strength
    advanced tests
    glina lodowcowa
    Warszawa
    ściśliwość
    wytrzymałość
    testy
    Opis:
    The selected parameters of the Wartanian and Odranian tills, with relation to their spatial occurrence, grain size distribution, mineralogical composition, matric suction and other physical characteristics, are presented. The assessment of the lithogenesis and stress history on the microstructure is attempted. The comparison of the compression and permeability characteristics from field and laboratory tests has been performed. Laboratory consolidation tests carried out with up to 20MPa vertical stress, revealed two yield stress values, one in the range of a couple hundreds kPa, the other in the range of a couple thousands kPa. Based on those results, the reliability of the soil preconsolidation assessment, with the use of the two different methods is discussed. The aspect of the triaxial strength reduction under the dynamic loading of diverse frequency and amplitude is raised. The research results depict a variety of possible geological-engineering characteristics, under the divergent constraints scenarios, of compression or strength weakening origin. The effects of the specialized research program will widen the possibilities of physio-mechanical and structural characterization of soils for geological-engineering purposes.
    Źródło:
    Acta Geologica Polonica; 2016, 66, 3; 561-585
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of methods for the detection of low-abundant snoRNA-derived small RNAs in Saccharomyces cerevisiae
    Autorzy:
    Walkowiak, M.
    Mleczko, A.M.
    Bakowska-Zywicka, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/80556.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2016, 97, 1
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The content of selenium in cow milk from milk machines in Szczecin in accordance to a season
    Zawartość selenu w mleku krowim oferowanym w mlekomatach z terenu Szczecina w zależności od pory roku
    Autorzy:
    Mituniewicz-Malek, A.
    Pilarczyk, B.
    Tomza-Marciniak, A.
    Pilarczyk, R.
    Bakowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/961519.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    selenium
    cow milk
    milk dispending machines
    seasons
    Szczecin
    Opis:
    The aim of this work was to assess the content of selenium in cow milk served in milk machines in Szczecin in accordance to a season. The research material included samples of milk collected in 5 milk machines located in Szczecin. The study was targeted to the evaluation of selenium content in accordance to a season. The mean content of selenium in milk from milk machines was diversified in a particular seasons and ranged from 0.013 to 0.034 µg · ml–1. The mean selenium content in cow milk from milk machines was 0.023 µg/ml. The lowest level of selenium was noted in summer (0.013 µg · ml–1), whereas the highest was found in autumn (0.034 µg · ml–1). No statistically significant differences were observed between the content of selenium in milk in winter and spring but in case of other seasons the noted differences were significant. Our study has shown that a particular attention has to be paid on the content of selenium in cow milk in summer, as in 72.22% of the tested samples the level of Se was marginal, and in 27.78% the level was deficient. Low concentration of selenium in cow milk in summer indicates that the animals residue in an area poorly supplied in this element. Thus, it is particularly relevant to introduce an early-diagnostics program evaluating the levels of selenium in dairy cattle and showing the possible need of selenium supplementation in cows.
    Źródło:
    Acta Scientiarum Polonorum. Zootechnica; 2017, 16, 3
    1644-0714
    Pojawia się w:
    Acta Scientiarum Polonorum. Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wild boars (Sus scrofa) as bioindicators of environmental levels of selenium in Poland
    Autorzy:
    Nowakowska, E.
    Pilarczyk, B.
    Pilarczyk, R.
    Tomza-Marciniak, A.
    Bakowska, M.
    Marciniak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/32147.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The objective of the study was to determine selenium content in selected organs (liver, kidney) of wild boars from different regions of Poland. Materials for the study were obtained from 28 sites located in 16 provinces of Poland. Selenium concentrations in organs were determined using spectrofluorometric methods after wet mineralization in HNO3 and HClO4 mixture. Mean selenium concentrations in the investigated wild boars from Poland were 0.230 μg/g wet weight in the liver and 1.327 μg/g w.w. in the kidneys. Hepatic and nephric Se concentrations ranged from 0.036-0.626 μg/g w.w. and 0.322-4.286 μg/g w.w., respectively. Selenium concentrations in the wild boars differed considerably according to geographical location. Concentrations of selenium were highest in wild boars from south-eastern provinces and lowest in animals from northern provinces. Most of Poland’s area is environmentally deficient in this trace element, as evidenced by marginal selenium levels in the organs of the wild boars.
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of supplementing selenized yeast to ewes from an organic farm on serum Se concentration in lambs
    Autorzy:
    Pilarczyk, B.
    Szewczuk, M.
    Pilarczyk, R.
    Tomza-Marciniak, A.
    Marciniak, A.
    Dobrzański, Z.
    Bąkowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/962847.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Opis:
    Our objective has been to determine the effect of supplementing selenized yeast to ewes kept on a poor diet, composed of fodder from periodically flooded meadows, on the reproductive results of ewes and the serum Se concentration in lambs, their body weight and daily weight gain. The study involved 25 ewes and 25 lambs, which were divided into two groups: experimental (12 ewes) and control (13 ewes). Their lambs were also assigned to different groups. Prior to supplementation, all the sheep from the two groups were analysed for selenium concentrations in the serum. The serum selenium concentrations were determined fluorometrically using a DAN and Shimadzu RF-5001 PC spectrofluorometer. The excitation wavelength was 376 nm, while the fluorescence emission wavelength was 518 nm. All sheep in the analysed flock were found to be selenium deficient. The supplementation of selenized yeast to the experimental group caused an almost 2.5-fold increase in the serum selenium concentration in the ewes. Lambs from the experimental group were characterized by a significantly higher concentration of selenium at 7 and 14 days of age (P ≤ 0.05) compared to control lambs. Very high (P < 0.001) positive correlations were found between the serum selenium concentration in Se-supplemented ewes and the serum selenium concentration in their lambs at 7 days (rx,y = 0.779) and 14 days of age (rx,y = 0.774). The enrichment of ewes’ diet with selenized yeast contributed to an increase in the serum selenium concentration in their lambs. However, only 14.29% of lambs achieved optimum levels of Se on day 7 after birth. At day 14 after birth, none of the lambs reached the optimum Se concentration. The serum selenium concentration in sheep can be a good indicator of the body’s supply with this element in adult sheep and of a possible selenium status in their offspring. On organic farms, the selenium content in sheep should be monitored constantly.
    Źródło:
    Journal of Elementology; 2016, 21, 4
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of selenium status and its distribution in organs of free living foxes (Vulpes vulpes) from an Se deficient area
    Autorzy:
    Pilarczyk, B.
    Pilarczyk, R.
    Tomza-Marciniak, A.
    Hendzel, D.
    Bakowska, M.
    Stankiewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/31746.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The objective of the study was to determine selenium status and its distribution in the organs of free living foxes from selenium deficient areas of north-western Poland. Samples of organs harvested from 40 foxes shot during the 2008-2009 hunting seasons served as experimental material. Selenium concentration in the organs was determined spectrofluorometrically. Selenium distribution in tissues depends largely on its dietary content. Our study indicated that concentrations of selenium in the examined organs followed the order: kidney>liver>spleen>lung>heart and kidneys were the organ with the highest retention of this element. Mean selenium concentration in fox kidneys was 0.60 ± 0.15 μg/g wet weight. Several times less selenium on average was found in the liver (0.27 ± 0.09 μg/g w.w.), lungs (0.17 ± 0.06 μg/g w.w.), spleen (0.19 ± 0.06 μg/g w.w.) and heart (0.13 ± 0.05 μg/g w.w.). All the animals studied were deficient in selenium.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selenium content in European smelt (Osmerus eperlanus eperlanus L.) in Pomerania Bay, Gdansk Bay and Curonian Lagoon
    Autorzy:
    Pilarczyk, B.
    Pilecka-Rapacz, M.
    Tomza-Marciniak, A.
    Domagala, J.
    Bakowska, M.
    Pilarczyk, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/15264.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    selenium content
    European smelt
    Osmerus eperlanus
    Pomeranian Bay
    Gdansk Bay
    Curonian Lagoon
    Opis:
    Migratory smelt (Osmerus eperlanus eperlanus L.) may be perceived as a valuable indicative organism in monitoring the current environmental status and in assessment of a potential risk caused by selenium pollution. The aim of the study was to compare the selenium content in the European smelt from the Bay of Pomerania, Gdansk, and the Curonian Lagoon. The experimental material consisted of smelt samples (muscle) caught in the bays of Gdansk and Pomerania and the Curonian Lagoon (estuaries of the three largest rivers in the Baltic Sea basin: the Oder, the Vistula and the Neman). A total of 133 smelt were examined (Pomerania Bay n = 67; Gdansk Bay n = 35; Curonian Lagoon n = 31). Selenium concentrations were determined spectrofluorometrically. The data were analyzed statistically using one-way analysis of variance, calculated in Statistica PL software. The region of fish collection significantly affected the content of selenium in the examined smelts. The highest content of selenium was observed in smelt caught in the Bay of Gdansk (0.236 μg g-1 w.w.), then in smelt from the Pomeranian Bay (0.165 μg g-1 w.w.), and the lowest in smelt obtained in the Curonian Lagoon (Lithuania) (0.104 μg g-1 w.w.). The low concentrations of selenium recorded in the smelt show that there is a deficiency of this element, especially in the Curonian Lagoon (Lithuania). Geochemically, Poland and Lithuania are selenium deficient areas. Migratory smelt may serve as indicative organisms of environmental levels of selenium.
    Źródło:
    Journal of Elementology; 2015, 20, 4
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Endoscopic examination of the urethra and the urinary bladder in dogs – indications, contraindications and performance technique
    Autorzy:
    Grzegory, M
    Kubiak, K.
    Jankowski, M.
    Spuzak, J.
    Glinska-Suchocka, K.
    Bakowska, J.
    Nicpon, J
    Halon, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/31762.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    This paper discusses indications, contraindications, and likely complications following the endoscopic examination of the urethra and the urinary bladder in dogs. In addition, the procedure performance techniques and evaluation of the particular sections of the lower urinary tract are presented as well as the equipment used for the urethrocystoscopy
    Źródło:
    Polish Journal of Veterinary Sciences; 2013, 16, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected meat and fattening features and sperm quality in young purebred and hybrid boars
    Wybrane cechy użytkowości tucznej i mięsnej a jakość nasienia u młodych knurów ras czystych i mieszańców
    Autorzy:
    Udala, J.
    Kwita, E.
    Gaczarzewicz, D.
    Kuba, J.
    Stankiewicz, T.
    Blaszczyk, B.
    Pilarczyk, B.
    Tomza-Marciniak, A.
    Bakowska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/44978.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Źródło:
    Acta Scientiarum Polonorum. Zootechnica; 2015, 14, 2
    1644-0714
    Pojawia się w:
    Acta Scientiarum Polonorum. Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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