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    Wyświetlanie 1-7 z 7
    Tytuł:
    Flora of toxic depots in selected industrial zones
    Autorzy:
    Petrik, P
    Soudek, P.
    Benesova, D.
    Najmanova, P.
    Najman, M.
    Vanek, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/56761.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    bioindication
    organic pollutant
    phytoremediation
    environment pollutant
    soil contamination
    industrial area
    polychlorinated biphenyl
    heavy metal
    flora
    Opis:
    Floristic composition in three industrial areas with soils contaminated by heavy metals (As, Cd, Cu, Hg, Pb, Zn) and organic pollutants (polychlorinated biphenyls) was studied. The content of Pb was only significantly correlated with the floristic composition and explained 13.8% of its variability considering spatial dependency of the sites. No correlation was found for PCBs. Altogether, 237 plant vascular species were found at three study sites (117, 133 and 105, respectively). The three study areas differed in their species composition represented by their own characteristic species. The gradient in the content of natives/non-natives, species number, prevailing life forms and indicator values for plant species investigated was revealed. Based on our results, for phytoremediation purposes we can select productive plant species with high biomass and ability to accumulate large amounts of heavy metals or organic compounds and surviving on soils with low mineral content.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2009, 78, 4; 327-334
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nature-oriented potential resource and melliferous value of forest belts in steppe agro-forest landscapes
    Autorzy:
    Samsonova, I.
    Gryazkin, A.
    Belyaeva, N.
    Belyaev, V.
    Petrik, P.
    Bespalova, V.
    Lyubimov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/38753.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Badawczy Leśnictwa
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2018, 60, 2
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the load on the hardness
    Autorzy:
    Petrik, J.
    Palfy, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/220458.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hardness
    load
    calibration
    uncertainty
    MSA
    Opis:
    The objective of the submitted paper is to analyze the influence of the load on the calibration of micro-hardness and hardness testers. The results were validated by Measurement Systems Analysis (MSA), Analysis of Variance (ANOVA) and Z-score. The relationship between the load and micro-hardness in calibration of micro-hardness testers cannot be explained by Kick's Law (Meyer's index "n" is different from 2). The conditions of Kick's Law are satisfied at macro-hardness calibration, the values of "n" are close to 2, regardless of the applied load. The apparent micro-hardness increases with the increase of the load up to 30 g; the reverse indentation size effect (ISE) behavior is typical for this interval of the loads. The influence of the load on the measured microhardness is statistically significant for majority of calibrations.
    Źródło:
    Metrology and Measurement Systems; 2011, 18, 2; 223-234
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Fluidity of Al-Si Alloy: Computer Simulation of the Influence of Temperature, Composition, and Pouring Speed
    Autorzy:
    Futáš, P.
    Petrík, J.
    Pribulová, A.
    Blaško, P.
    Palfy, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/351852.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Si
    fluidity
    computer simulation
    regression analysis
    Monte Carlo method
    Opis:
    The purpose of this study is to identify relationships between the values of the fluidity obtained by computer simulation and by an experimental test in the horizontal three-channel mould designed in accordance with the Measurement Systems Analysis. Al-Si alloy was a model material. The factors affecting the fluidity varied in following ranges: Si content 5 wt.% – 12 wt.%, Fe content 0.15 wt.% – 0.3 wt. %, the pouring temperature 605°C-830°C, and the pouring speed 100 g · s-1 – 400 g · s-1. The software NovaFlow&Solid was used for simulations. The statistically significant difference between the value of fluidity calculated by the equation and obtained by experiment was not found. This design simplifies the calculation of the capability of the measurement process of the fluidity with full replacement of experiments by calculation, using regression equation.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1799-1804
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of Slags from Foundry Process
    Autorzy:
    Pribulová, A.
    Futáš, P.
    Bartošová, M.
    Petrík, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/106935.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    melting
    metallurgical furnace
    slag
    hydraulicity
    compressive strength
    Opis:
    The melting of steel or cast iron is one step of the foundry process. The foundry industry uses different types of furnaces, and metallurgical slags are products of the pyrometallurgical processes defecting in these furnaces. Furnace slag is a non-metallic by-product that consists primarily of silicates, alumina silicates, and calcium-alumina-silicates. As a by-product of the melting process, furnace slags vary considerably in form depending on the melted metal furnace types, and slag cooling method used. Most quantity of slags from the foundry processes are created in a cupola furnace that is used for cast iron production. An electric arc furnace is usually used for steel production, but it can be used for cast iron production as well. Universal use features an electric induction furnace. Slags from the melting processes in a foundry can be in the form of gravel, or the slag from a cupola furnace can be granulated. The utilization of slags from foundry processes is very delimited in Slovakia because of their quantity. This article deals with the possibility of using foundry slag as a binder in civil engineering. A basic property of a binder in civil engineering is its hydraulicity, which can be given by compression strength. Four metallurgical slags were tested. The values of the compressive strength of the slags were low, but addition cement to the slags resulted in a strong increase in the value of the compressive strength.
    Źródło:
    Journal of Casting & Materials Engineering; 2017, 1, 4; 103-109
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Cupola Furnace and Blast Furnace Slags with Respect to Possibilities of Their Utilization
    Autorzy:
    Pribulová, A.
    Futáš, P.
    Petrík, J.
    Pokusová, M.
    Brzeziński, M.
    Jakubski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/350993.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cupola furnace slag
    blast furnace slag
    chemical composition
    melting temperature
    microstructure of slag
    Opis:
    Blast furnace and cupola furnace are furnace aggregates used for pig iron and cast iron production. Both furnace aggregates work on very similar principles: they use coke as the fuel, charge goes from the top to down, the gases flow against it, etc. Their construction is very similar (cupola furnace is usually much smaller) and the structures of pig iron and cast iron are very similar too. Small differences between cast iron and pig iron are only in carbon and silicon content. The slags from blast furnace and cupola furnace are very similar in chemical composition, but blast furnace slag has a very widespread use in civil engineering, primarily in road construction, concrete and cement production, and in other industries, but the cupola furnace slag utilization is minimal. The contribution analyzes identical and different properties of both kinds of slags, and attempts to explain the differences in their uses. They are compared by the contribution of the blast furnace slag cooled in water and on air, and cupola furnace slag cooled on air and granulated in water. Their chemical composition, basicity, hydraulicity, melting temperature and surface were compared to explain the differences in their utilization.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 4; 1865-1873
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elemental composition of fly ash: a comparative study using nuclear and related analytical techniques
    Skład pierwiastkowy popiołów lotnych: studium przypadku z wykorzystaniem metod nuklearnych i analitycznych
    Autorzy:
    Eze, C. P.
    Fatoba, O.
    Madzivire, G.
    Ostrovnaya, T. M.
    Petrik, L. F.
    Frontasyeva, M. V.
    Nechaev, A. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/106537.pdf
    Data publikacji:
    2013
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    coal fly ash
    epithermal neutron activation analysis
    X-ray diffraction
    inductively coupled-optical emission spectroscopy
    and laser ablation inductively coupled-mass spectroscopy
    popioły lotne z węgla
    epitermalna neutronowa analiza aktywacyjna
    dyfrakcja rentgenowska
    optyczna spektroskopia emisyjna indukcyjnie sprzężona
    ablacja laserowa indukcyjnie sprzężona ze spektroskopią masową
    Opis:
    Epithermal neutron activation analysis along with ICP-OES, LA ICP-MS, and XRF were used to determine the elemental composition of coal fly ash from the Malta coal power station in the Mpumalanga province of South Africa. A total of 54 major, trace and rare earth elements were obtained by the four analytical techniques. The results were compared and the discrepancies discussed to show the merits and drawbacks of each of the techniques. It was shown that the elemental content of this particular coal fly ash are of the same order as the NIST standard reference material Coal Fly Ash 1633b.
    W celu określenia składu pierwiastkowego popiołów lotnych z elektrowni węglowej Malta w prowincji Mpumalanga w Republice Południowej Afryki wykorzystano epitermalną, neutronową analizę aktywacyjną oraz ICP-OES, LA ICP-MS i XRF. Za pomocą czterech techniki analitycznych oznaczono stężenia 54 głównych i śladowych pierwiastków oraz pierwiastków ziem rzadkich. Wyniki porównano, a także opisano różnice pokazujące zalety oraz wady każdej z wykorzystanych metod. Wykazano, że skład pierwiastkowy popiołu lotnego jest porównywalny ze składem standardowego materiału odniesienia NIST Węgiel Popiół Lotny 1633b.
    Źródło:
    Chemistry-Didactics-Ecology-Metrology; 2013, 18, 1-2; 19-29
    2084-4506
    Pojawia się w:
    Chemistry-Didactics-Ecology-Metrology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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