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    Wyświetlanie 1-7 z 7
    Tytuł:
    Environmental characteristics of the mining area affected by sulphide minerals and acidification (Banská Štiavnica, Slovakia)
    Autorzy:
    Remešicová, Erika
    Andráš, Peter
    Kučerová, Radmila
    Powiązania:
    https://bibliotekanauki.pl/articles/2176837.pdf
    Data publikacji:
    2018-12-31
    Wydawca:
    Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
    Tematy:
    heavy metals
    contamination
    acidification
    availability
    metale ciężkie
    zanieczyszczenia
    zakwaszenie
    dostępność
    Opis:
    The area of Sedem Žien tailing pond and the nearby Šobov hydroquartzite quarry affected by mining activity were investigated by geochemical and mineralogical methods to determine the contaminating chemical compounds and study their availability. Degradation of the hydrothermal base mineralisation (galena, sphalerite, pyrite, pyrrhotite and chalcopyrite) and of fine-grained pyrite oxidation, which forms impregnations in hydroquartzite produce Acid Mine Drainage (AMD). The area is acidified and the country components (soil, rock, water) are contaminated mainly by Pb, Zn and Fe. The tailing pond dam forming soils show acid pH (2.28-3.25), whereas the soil on the tailing pond surface is close neutral pH (7.26). The leaching availability of the metals from the soil is up to 75%. The AMD from the hydroquartzite quarry is in comparison with those percolating the tailing pond sediments very acid (pH 2.71) and contains high concentration of metals (Fe 311 mg.L-1, Zn 1690 µg.L-1, Cu 890 µg.L-1, Pb 126 µg.L-1).
    Za pomocą metod geochemicznych i mineralogicznych, zbadano obszar osadnika Sedem Žien i pobliskiego kamieniołomu hydro-kwarcytu Šobov, dotkniętych działalnością górniczą, w celu określenia związków chemicznych zanieczyszczających te tereny i zbadania ich dostępności. Degradacja hydrotermalna oparta na mineralizacji (galena, sfaleryt, piryt, pirotyn i chalkopiryt) i utlenianiu drobnoziarnistego pirytu, której formy impregnują hydro-kwarcyt, produkuje kwaśne odcieki z kopalń (AMD). Obszar jest zakwaszony, a składniki lokalne (gleba, skała, woda) są zanieczyszczone, głównie przez Pb, Zn i Fe. Zanieczyszczenia zapory osadnika tworzą gleby kwaśne (pH 2,28 - 3,25), natomiast zanieczyszczona gleba na powierzchni osadnika jest zbliżona do odczynu obojętnego (pH 7,26). Dostępność ługowania metali z gleby wynosi tu aż do 75%. AMD z kamieniołomu hydro-kwarcytu, jest porównywalna z tymi przenikającymi, bardzo kwaśnymi (pH 2,71), zanieczyszczeniami sedymentacyjnymi osadnika i zawiera wysokie stężenia metali (Fe 311 mg.L-1, Zn 1690 μg.L-1, Cu 890 μg.L-1, Pb 126 μg.L-1).
    Źródło:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2018, 3; 103-122
    2543-8832
    2545-0999
    Pojawia się w:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Waves of excitations in heterogeneous annular region, asymmetric arrangement
    Autorzy:
    Volford, András
    Simon, Peter
    Farkas, Henrik
    Powiązania:
    https://bibliotekanauki.pl/articles/1341485.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    This paper deals with the propagation of waves around a circular obstacle. The medium is heterogeneous: the velocity is smaller in the inner region and greater in the outer region. The interface separating the two regions is also circular, and the obstacle is located eccentrically inside it. The different front portraits are classified.
    Źródło:
    Banach Center Publications; 1999, 50, 1; 305-320
    0137-6934
    Pojawia się w:
    Banach Center Publications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Colour analysing of IPA brewing phases, including daily measuring of the fermentation process
    Autorzy:
    Barczi, András
    Szabó, Dorottya
    Magyari, Péter
    Géczi, Gábor
    Powiązania:
    https://bibliotekanauki.pl/articles/2172261.pdf
    Data publikacji:
    2022
    Wydawca:
    Państwowa Wyższa Szkoła Zawodowa w Tarnowie
    Tematy:
    brewing
    color analysiation
    IPA
    wort
    color measuring
    piwowarstwo
    analiza kolorystyczna
    brzeczka
    pomiar koloru
    Opis:
    Over the last decade, the brewing revolution has shown a new face to brewing. Besides the large-scale production, small-scale, artisanal hand crafted, and home breweries have also become important and relevant. This change has forced large-scale compa-nies to change their usual methods and brew other types of recipes as well.One of the most popular ALE-type beers is the Indian Pale Ale (IPA), which gives beer a fruity-citrus flavour due to its hop content. It is especially popular with novice brewers as it has no enormous machine requirements compared to LAGER-type beers.In the study, we made our already known and popular recipe, a New England IPA, in a 30-litre brewing pot. This type requires only one type of malt; however, we added barley flakes, oat flakes, and wheat flakes to enhance the flavour. Hops are very domi-nant in the taste of this type of beer, five of which were used during brewing and later at “dry hopping” during fermentation.Sampling was performed every minute during mashing, brewing, hopping, cooling, and yeasting with a calibrated NIX-type measuring device with repetition to avoid measurement errors. During the fermentation stage, the colour change was observed by daily sampling. The study aims to separate the stages of brewing by colour and identify the stages of the already known biological and chemical activities by colour. This study is the first part of a more extended series of experiments where we will perform similar experiments on several types of beer (LAGER, STOUT, APA, WHEAT, RED, etc.). We would also like to know about the possible effect of carbonisation on colour, the possible effect of storage in a bottle on colour, and possible deviations from a similar decoction.
    Źródło:
    Science, Technology and Innovation; 2022, 15, 1; 1--7
    2544-9125
    Pojawia się w:
    Science, Technology and Innovation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbiological characterization of stable resuspended dust
    Autorzy:
    Kováts, Nora
    Horváth, Eszter
    Jancsek-Turóczi, Beatrix
    Hoffer, András
    Gelencsér, András
    Urbán, Péter
    Kiss, Írisz E.
    Bihari, Zoltán
    Fekete, Csaba
    Powiązania:
    https://bibliotekanauki.pl/articles/2177051.pdf
    Data publikacji:
    2015-11-23
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    stable
    air quality
    dust
    microbial community
    next generation sequencing
    pathogens
    Opis:
    Objectives Air quality in the stables is characterized by elevated level of dust and aeroallergens which are supposed to directly cause or exacerbate several respiratory disorders. The most often recognized problem is recurrent airway obstruction (RAO), previously known as chronic obstructive pulmonary disease (COPD). There is some indication that aeroallergens (among them endotoxins) may also cause inflammation in human airways and may exceed safe levels in stables. Monitoring studies have covered mainly the determination of the concentration of respirable particles and of culturable fungi and their toxins. However, these particles do not only directly affect the respiratory system, but might act as a carrier conveying toxic contaminants and biological agents such as bacteria. In a typical, 20-horse Hungarian stable, microbial community of respirable fraction of resuspended dust has been characterized to reveal if these particles convey hazardous pathogenic bacteria, posing risk to either horses or staff. Material and Methods Resuspended dust was sampled using a mobile instrument. The instrument contains a PARTISOL-FRM model 2000 sampler that was operated at a flow rate of 16.7 l/min and a cyclone separator which collected the particulate matter with an aerodynamic size between 1 μm and 10 μm (PM 1–10) fraction. Microbial taxa were identified by culture-independent next generation sequencing (NGS) of variable 16S ribosomal ribonucleic acid (rRNA) gene regions. Results In total, 1491 different taxa were identified, of them 384 were identified to species level, 961 to genus level. The sample was dominated by common ubiquitous soil and organic material-dwelling taxa. Conclusions Pathogens occurred at low abundance, and were represented by mostly facultative human pathogens, with the prevalence of Staphylococcus species.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2016, 29, 3; 375-380
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A re-analysis of Chibanian Pleistocene tracks from Vértesszőlős, Hungary, employing photogrammetry and 3D analysis
    Autorzy:
    Tanaka, Ikuko
    Markó, András
    Hyodo, Masayuki
    Strickson, Catherine E.
    Falkingham, Peter L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1835997.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Pleistocene
    Palaeolithic site
    calcareous mudstone
    mammal track
    comparative ichnology
    Opis:
    The Vértesszőlős quarry, the Palaeolithic site where the “Samu” hominin fossil remains (Homo heidelbergensis) were found, is located in North West Hungary. The site is dated between the Early and Middle Pleistocene (ca. 310 ka). A short distance from where the Samu remains were found is an exposed surface of calcareous mudstone, preserving numerous fossil tracks made by a range of mammals and birds. Of particular interest are three elongate impressions - two potentially successive and one isolated. These tracks have previously been referred to either hominin or ursine trackmakers. Since bear pes tracks can superficially resemble human tracks, we attempted to discern the 3D morphology of the traces using digital photogrammetry. Our analysis suggests the isolated impression is likely the product of two superimposed tracks of a cloven hoofed ungulate. However, the two potentially successive tracks are more problematic. The highly weathered surface (first exposed in the 1960’s) has made interpretation difficult. Both impressions seem to possess a narrow, rounded end similar to the posterior heel margin of a human track. At the anterior end the impressions are broader, and bounded by smaller impressions that could be interpreted as toe marks. However, these two tracks differ considerably in their length/width ratios and are too widely spaced to be part of a single bipedal trackway. It is conceivable that one or both of these impressions may be highly weathered hominin tracks. However, given the highly weathered nature of the exposed surface, and the lack of morphological detail in the tracks, we cannot at this time confidently attribute the tracks to any specific trackmaker, despite our digital models of the tracks which provide a relatively objective means of analysis independent of prior assumptions.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2021, 91, 1; 75-83
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Feeding state and age dependent changes in melanin-concentrating hormone expression in the hypothalamus of broiler chickens
    Autorzy:
    Simon, Ádám
    Németh, József
    Jávor, András
    Komlósi, István
    Bai, Péter
    Oláh, János
    Juhász, Béla
    Kiss, Rita
    Szilvássy, Zoltán
    Czeglédi, Levente
    Powiązania:
    https://bibliotekanauki.pl/articles/1038398.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    chicken
    feeding states
    hypothalamus
    MCH
    qPCR
    RIA
    Opis:
    We aimed to quantify the gene expression changes of the potent orexigenic melanin-concentrating hormone (MCH) in chicken (Gallus gallus) hypothalamus with quantitative real-time polymerase chain reaction (qPCR), and for the first time determine peptide concentrations with a novel radioimmunoassay (RIA) under different feeding status. Three different experimental conditions, namely ad libitum feeding; fasting for 24 h; fasting for 24 h and then refeeding for 2 h, were applied to study changes of the aforementioned target and its receptor (MCHR4) gene expression under different nutritional status. The relative changes of MCH and MCHR4 were also studied from 7 to 35 days of age. Expression of PMCH and MCHR4 along the gastrointestinal tract (GIT) was also investigated. We found that expression of both targets was significant in the hypothalamus, while only weak expression was detected along the GIT. Different nutritional states did not affect the PMCH and MCHR4 mRNA levels. However, fasting for 24 h had significantly increased the MCH-like immunoreactivity by 25.65%. Fasting for 24 h and then refeeding for 2 h had further significantly increased the MCH peptide concentration by 32.51%, as compared to the ad libitum state. A decreasing trend with age was observable for both, the PMCH and MCHR4 mRNA levels, and also for the MCH-like immunoreactivity. Correlation analysis did not result in a significant correlation between MCH peptide concentration and abdominal fat mass in ad libitum fed birds. In conclusion, MCH peptide concentration altered in response to 24 h fasting, which indicated that this peptide may take part in feed intake regulation of broiler chickens.
    Źródło:
    Acta Biochimica Polonica; 2018, 65, 2; 251-258
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative Research on the Metropolitan Administration and Service in Porto
    Autorzy:
    Hoffman, István
    Fazekas, János
    Bencsik, András
    Bodó, Bálint Imre
    Budai, Kata
    Dancs, Tamás
    Dombrovszky, Borbála
    Ferge, Péter
    Kári, Gergely
    Lukács, Domokos
    Kárász, Marcell
    Gönczi, Lili
    Vasas, Zsolt Renátó
    Cseh, Kristóf Balázs
    Papp, Dorottya
    Molnár, Csaba
    Powiązania:
    https://bibliotekanauki.pl/articles/1912687.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
    Tematy:
    comparative analysis
    inter-municipal cooperation
    urban governance
    municipal law
    public services
    Portugal
    analiza porównawcza
    współpraca międzygminna
    zarządzanie miejskie
    prawo miejskie
    usługi publiczne
    Portugalia
    Opis:
    The Porto Metropolitan Area (Área Metropolitana do Porto, AMP) is a framework of cooperation between 17 municipalities and several districts. This metropolitan area has a specific, inter-municipal model of urban governance. In our research, we found that cooperation is significant mainly in sectors where the central legislature has essentially made this mandatory, by designing the AMP and defining its powers. In addition to AMP, only partial cooperation has been established in the field of waste management, and in the field of human public services and in the performance of public authority, there is essentially a set of autonomous organisational solutions. However, despite all this fragmentation, the above system ensures the satisfactory functioning of the metropolitan agglomeration. This also underlines the importance of transport management in urban areas, since this functioning system is based on an integrated and intermodal transport system
    Obszar metropolitalny Porto (Área Metropolitana do Porto, AMP) składa się z 17 gmin i kilku okręgów. Przyjęto tu specyficzny, międzygminny model zarządzania. Na podstawie przeprowadzonych badań stwierdzono, że współpraca jest znacząca głównie w sektorach, którym centralny prawodawca zasadniczo nadał taki obowiązek, projektując AMP i określając jego uprawnienia. Oprócz AMP nawiązano jedynie częściową współpracę w zakresie gospodarki odpadami, a w zakresie usług publicznych i wykonywania władzy publicznej istnieje w zasadzie zestaw autonomicznych rozwiązań organizacyjnych. Pomimo całego tego rozdrobnienia system ten zapewnia odpowiednie funkcjonowanie aglomeracji metropolitalnej. Istotne jest również zarządzanie transportem na obszarach miejskich, ponieważ jest ono oparte na zintegrowanym i intermodalnym systemie transportowym.
    Źródło:
    Studia Iuridica Lublinensia; 2020, 29, 4; 11-30
    1731-6375
    Pojawia się w:
    Studia Iuridica Lublinensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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