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    Wyświetlanie 1-8 z 8
    Tytuł:
    Effects of non-<i>aureus</ i> staphylococci on colostrum composition, properties and fatty acid profile in cow – a preliminary study
    Autorzy:
    Pikhtirova, A.
    Pecka-Kiełb, E.
    Zachwieja, A.
    Bujok, J.
    Zigo, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/16647376.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    cow
    colostrum
    fatty acids
    non-aureus staphylococci
    Opis:
    By providing the body with essential nutrients, colostrum plays an immune and immunostimulating function. Colostrum quality depends on multiple factors, including microbial presence. This study aimed to explore the effect of non-aureus staphylococci on colostrum quality. Physical and chemical properties, fatty acid profile of cow colostrum were determined. In our study, we identified three non-aureus staphylococci species in the colostrum: S. sciuri, S. xylosus and S. warneri. The percentage of dry matter in staphylococci positive and negative colostrum samples did not differ significantly. Contents of fat, protein, and lactose in the colostrum were similar. The content of butyric (С4:0) and capric (С10:0) acids was significantly higher in the colostrum fat from samples positive for non- aureus staphylococci. Total bacterial count was lower in non- aureus staphylococci positive samples, while pH increased. The percentage of β-casein was lower in colostrum with a positive culture for non- aureus staphylococci.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 4; 571-578
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of effect of parenteral and oral supplementation of Selenium and vitamin E on selected antioxidant parameters and udder health of dairy cows
    Autorzy:
    Vasiľ, M.
    Zigo, F.
    Farkašová, Z.
    Pecka-Kielb, E.
    Bujok, J.
    Illek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539105.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    dairy cows
    calving
    colostrum
    glutathione peroxidase
    milk malondialdehyde
    mastitis
    Opis:
    The aim of this study was to compare the effect of parenteral and oral supplementation of Selenium (Se) and vitamin E (VTE) on selected antioxidant parameters in blood and colostrum as well as their effect on the incidence of mastitis in dairy cows during the final phase of gravidity (6 weeks) and first two weeks after calving. For the practical part of the study 36 dairy cows of Slovak pied breed in the second to fourth lactation-gestation cycle were selected. The animals weredivided into three groups: the control (C) and two experimental groups (D1 and D2). The selected groups were treated as follows: in group D1 products containing Se (Selevit inj.) and vitamin E (Erevit sol. inj.) were administered intramuscularly twice, six and three weeks prior to parturition; in group D2 a vitamin-minerals supplement in the form of sodium selenite (Na2SeO3) and dl-α-tocopherol acetate were supplemented orally for six weeks calving. The blood samples were collected from the vena jugularis in dairy cows approximately 42 days before calving (control sampling), on parturition day, and the 14th day after calving. Higher concentrations of Se and VTE were found in the blood plasma samples of both experimental groups collected on the day of parturition. In addition, the orally supplemented group (D2) showed higher Se and α-tocopherol concentrations in blood plasma on the14th day after calving as well a reduction of occurrence of mastitis by about 25 % compared to the control group. The relationship between inflammatory response and oxidative stress was also confirmed. The concentrations of milk malondialdehyde indicating lipid peroxidation during mastitis were significantly higher in milk samples from infected cows than in milk samples from healthy animals in each monitored group. In order to prevent oxidative stress and moderate inflammatory response in dairy cows it is very important to optimally balance their nutritive needs with an appropriate ratio of Se and VTE supplements. Therefore we still recommend supplementation of the cows’ postpartum dietwith 0.5 mg of Se/kg dry matter (DM) and 102 mg of dl-α-tocopherol acetate/kg DM to stabilize their optimal blood levels, stimulate the activity of glutathione peroxidase and reduce the incidence of mastitis.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 1; 155-164
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of possibilities of CO2 geosequestration in geological structures of the Czech Republic
    Oszacowanie możliwości geosekwestracji CO2 w strukturach geologicznych Republiki Czech
    Autorzy:
    Bujok, P.
    Nemec, P.
    Nemec, J.
    Konecny, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/300562.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    dwutlenek węgla
    magazyny CO2
    carbon dioxide
    CO2 storage
    Opis:
    The present-day emissions of carbon dioxide (CO2) generated by anthropogenic activities and the expected future growing production of them are even now a serious ecological problem. One of possibilities of solving this situation is CO2 storage, i.e. the building of CO2 storage sites in suitable parts of the rock mass. They are represented, in addition to ideal localities, which are mined-out deposits of natural gas and oil, by selected geological formations of sedimentary Carboniferous deposits of hazd coal, it means localities of closed underground hard coal mines provided that they are ''tight'' enough. For the purposes of CO2 geosequestration, theoretically all closed hard coalfields exploited using the underground method in the Czech Republic can be considered, namely the Rosice-Oslavany (RUD), Kladno, Zacler-Svatonovice and Most Coalfields, and partial localities (closed mines) in the Czech part of Upper Silesian Hard Coal Basin (Ostrava-Karvina Coalfield). Of hydrocarbon deposits situated especially in the Vienna Basin, the Poddvorov, Nitkovice, Kostelany-vychod and Zdanice-zapad structures seem to be most promising.
    Obecne emisje dwutlenku węgla (CO2) pochodzenia antropogenicznego oraz przewidywany w przyszłości ich wzrost nadal stanowią problem ekologiczny. Jednym ze sposobów rozwiązania tego problemu jest magazynowanie CO2 tzn. budowanie miejsc magazynowania CO2 w nadających się do tego częściach górotworu. Należą do nich takie idealne miejsca, jak wyeksploatowane przestrzenie po produkcji gazu ziemnego i ropy naftowej, jak również niektóre formacje geologiczne, np. skały osadowe Karbonu z wyeksploatowanymi i odpowiednio szczelnymi złożami węgla kamiennego. Geosekwestracja CO2 wykonywana jest w zasadzie na wszystkich czeskich złożach węgla kamiennego eksploatowanych metodą podziemną, tj. Rosice-Oslavany (RUD), Kladno, Zacler-Svatonovice, w większości złóż, jak również w częściowo zlikwidowanych kopalniach czeskiej części Górnośląskiego Zagłębia Węglowego (Ostrava-Karvina). Spośród złóż zlokalizowanych w Basenie Wiedeńskim, najbardziej obiecujące wydają się być złoża Poddvorov, Nitkovice, Kostelany-vychod i Zdanice-zapad.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2009, 26, 1--2; 107-117
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Petro-physical properties of geological formation in the aspect of possible CO2 sequestration
    Autorzy:
    Klempa, M.
    Porzer, M.
    Bujok, P.
    Pavlus, J.
    Rado, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/298902.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    carbon dioxide
    enhanced oil recovery (EOR)
    porosity
    permeability
    Opis:
    CO2 emissions and a future increasing trend can be, by some scientists, considered a serious menace for the sustainable development of mankind and the reduction is necessary for the environment protection. Carbon dioxide is one of the most important gases that causes greenhouse effect, which warms up the earth surface as a consequence of a different heat flow between the earth and the atmosphere.
    Źródło:
    AGH Drilling, Oil, Gas; 2013, 30, 1; 109-116
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The problem of liquidation of the open eruption by drilling tools
    Autorzy:
    Bujok, P.
    Fibinger, J.
    Klempa, M.
    Porzer, M.
    Kalus, D.
    Rado, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/298940.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    liquidation of open eruption
    drilling tools
    drill string
    Opis:
    Drilling process of deep borehole consists of different drilling operations. Each of them can cause numerous different drilling problems especially when a borehole is performed. While drilling the most dangerous problems can occur once the drilling fluids (oil, gas or water) spontaneously flow out from the drilled formations into the borehole and then to the surface. It can also happen that the pressures in the borehole are not balanced and an influx of fluid into the borehole (a kick) will occur. If no action is taken to stop a kick once it begins, then the fluids will be pushed out of the borehole and will be flowing uncontrollably to surface (blow-out). Blow-out is prevented by closing off the well at the surface with special kind of valves (Blow-out Preventers - BOPs). When pressure control over the well is lost, swift action must be taken to avert the severe consequences. These consequences may include: — endangering of human life, — loss of rig and equipment, — negative influence on the environment, — additional costs of bringing the well under control again, — loss of reservoir production. In the case of kick or blow-out will occur in the practical use are different procedures and methods to control a borehole. These procedures and methods depend on the actual drilling operation scenario. One of them can be a tripping operation when the drill string is pulled out or run back again. In this case the drill string is open either after a break-out or before making up the drill pipes and drill collars. There is a variety of tools that can be used to prevent the formation of fluids rising up inside the drill pipes. One of this tool is a safety valve (rod preventers - BOP) to prevent the blow-out of the drill string. This manuał safety valve should be kept on the rig floor at all times. It needs to be a fuli opening ball-type valve so there is no restriction to flow. This valve is installed onto the top of the drill string if a kick occurs during a trip. However, this solution is quite inconvenient and difficult because involves special heavy tools, e.g. a crane. Drilling process of deep borehole consists of different drilling operations. Each of them can cause numerous different drilling problems especially when a borehole is performed. While drilling the most dangerous problems can occur once the drilling fluids (oil, gas or water) spontaneously flow out from the drilled formations into the borehole and then to the surface. It can also happen that the pressures in the borehole are not balanced and an influx of fluid into the borehole (a kick) will occur. If no action is taken to stop a kick once it begins, then the fluids will be pushed out of the borehole and will be flowing uncontrollably to surface (blow-out). Blow-out is prevented by closing off the well at the surface with special kind of valves (Blow-out Preventers - BOPs). When pressure control over the well is lost, swift action must be taken to avert the severe consequences. These consequences may include: — endangering of human life, — loss of rig and equipment, — negative influence on the environment, — additional costs of bringing the well under control again, — loss of reservoir production. In the case of kick or blow-out will occur in the practical use are different procedures and methods to control a bore¬hole. These procedures and methods depend on the actual drilling operation scenario. One of them can be a tripping operation when the drill string is pulled out or run back again. In this case the drill string is open either after a break-out or before making up the drill pipes and drill collars. There is a variety of tools that can be used to prevent the formation of fluids rising up inside the drill pipes. One of this tool is a safety valve (rod preventers - BOP) to prevent the blow-out of the drill string. This manuał safety valve should be kept on the rig floor at all times. It needs to be a fuli opening ball-type valve so there is no restriction to flow. This valve is installed onto the top of the drill string if a kick occurs during a trip. However, this solution is quite inconvenient and difficult because involves special heavy tools, e.g. a crane. This paper presents a new solution making use of special control equipment for the blowing open drill string. This equipment is based on a hydraulic press (named "Drill Pipę Rescue Press I") which has been developed by HBZS, MND S.A. Hodonin and VSB-Technical University of Ostrava, supported by Faculty of Drilling, Oil and Gas AGH-UST Kraków.
    Źródło:
    AGH Drilling, Oil, Gas; 2014, 31, 2; 199-205
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Special shut off device for liquidating blowout from the drill string
    Autorzy:
    Bujok, P.
    Klempa, M.
    Ryba, J.
    Porzer, M.
    Jakubcik, M.
    Stastny, L.
    Rado, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/299221.pdf
    Data publikacji:
    2018
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    blowout
    blowout killing
    damaged drillstring
    oil and gas drilling blowout equipment
    Opis:
    Crude oil and natural gas belong to the most important raw minerals used by industry. Their world’s consumption remains on a high level with an increasing tendency, similarly the demand for exploration-prospecting works. The drilling works associated with reservoir prospecting and development are connected with the risk of reaching intervals containing highly pressurized formation fluids and with blowouts. When drilling the first well in a given area, the operator frequently does not have a full set of data about reservoir parameters of the drilled horizons. Investors want the drilling companies finish their works in the shortest possible time, therefore technologies which maximize the drilling advancement are employed. One of such techniques is drilling with minimally higher hydrostatic pressure of mud as compared to the reservoir pressure. If the drilling hits a porous interval of elevated reservoir pressure, reservoir fluid may inflow to the wellbore. If the hydrostatic pressure of fluid column in the wellbore is lower than reservoir pressure, the wellbore will be fed with reservoir water, which will consequently migrate towards the top of the well. This may result in a kick and then a blowout. The inflow to the wellbore can be handled only by well trained crew and appropriate equipment. The crew has to recognize the flow, and depending on the condition of the well take suitable measures. Sometimes the lack of proper training, errors, hardware failures and improperly protected top of the well lead to a fully developed blowout from the well. Particularly dangerous are cases when the surface blowout prevention equipment or other elements of the well BOP facilities break down. In such situations rescue teams with specialist equipment have to be involved. Exemplary applications and technological potential of specialist blowout control equipment in uncontrolled kick of reservoir fluid though the string are presented in the paper. The designed tool and its functions allow for killing or reducing the outflow.
    Źródło:
    AGH Drilling, Oil, Gas; 2018, 35, 1; 309-321
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Re-disposal of old exploitation wells : potential sources of environmental pollution in abondoned hydrocarbon deposits of the Czech Republic
    Ponowna likwidacja starych odwiertów eksploatacyjnych : potencjalne źródła zanieczyszczenia środowiska w nieczynnych złożach węglowodorów w Republice Czeskiej
    Autorzy:
    Bujok, P.
    Klempa, M.
    Slivka, V.
    Ryba, J.
    Němec, I.
    Štastná, V.
    Porzer, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2067118.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ropa naftowa
    gaz ziemny
    powtórna likwidacja
    zanieczyszczenie
    źródło wody pitnej
    ekologia
    oil natural
    gas natural
    well re-liquidation
    contamination
    source of drinking water
    ecology
    Opis:
    This article deals with a significant issue of environmental protection of oil and gas deposits that have recently drawn a considerable attention. The presence of old insufficiently sealed or entirely unsealed wells, formerly serving a purpose of oil and natural gas extraction, pose a significant threat to the environment. In the South Moravia region of the Czech Republic (an area of hydrocarbon extraction both in historical and recent times), there is a significant amount (hundreds) of production wells. It is very difficult or often even impossible to find information in archival materials on the cease of extraction from these wells and on the system of abandonment procedures applied. During the recent surveying and re-abandonment works, it was found that many wells had been abandoned inadequately and unprofessionally, and numbers of wells still have not been abandoned at all. This poses a considerable risk to the South Moravian landscape, especially to the sources of drinking water and to agriculture (to the Protected Area of Natural Water Accumulation - CHOPAV, Morava River Quaternary). Furthermore, it is a significant threat to the areas where extremely valuable biotopes occur. This article discusses the possible disposal of these ecological hazards to the areas of hydrocarbon deposit occurrences through recycling of old drawing wells as potential pollution sources of soil and water. Similar problems have certainly appeared in the Polish territory, where intense extraction took place at a far greater number of deposits, and where the wells already operated in the 19th century, in days gone by when there was little knowledge of abandonment procedures and little awareness of proper old well sealing.
    W artykule omówiono ważny problem ochrony środowiska w rejonie złóż ropy i gazu, którym ostatnio poświęcano wiele uwagi. Obecność starych, niedostatecznie uszczelnionych lub całkowicie nieuszczelnionych otworów wiertniczych, wcześniej wykorzystywanych do eksploatacji ropy i gazu ziemnego, jest poważnym zagrożeniem. W Czechach, na Południowych Morawach (obszar eksploatacji węglowodorów zarówno w przeszłości jak i obecnie), istnieje bardzo wiele (setki) otworów eksploatacyjnych. W materiałach archiwalnych bardzo trudno (często wręcz niemożliwe) jest znaleźć informacje na temat zarówno sposobu zakończenia eksploatacji w tych otworach, jak i zastosowanych procedur ich likwidacji. W trakcie niedawno prowadzonych badań i prac nad ponowną likwidacją otworów stwierdzono, że wiele z nich było zlikwidowanych nieodpowiednio i nieprofesjonalnie, a niektóre nadal nie zostały zlikwidowane. Stwarza to znaczne zagrożenie dla obszaru Południowych Moraw, w szczególności dla źródeł wody pitnej oraz rolnictwa (Obszar Chroniony Naturalnej Akumulacji Wód- CHOPAV, Czwartorzęd Rzeki Morawy). Co więcej, jest to poważne zagrożenie dla obszaru występowania bardzo cennych biotopów. Artykuł omawia możliwości usunięcia tych ekologicznych zagrożeń na obszarach złóż węglowodorów poprzez recykling dawnych otworów eksploatacyjnych będących źródłem zanieczyszczenia gleb i wód. Podobne problemy z pewnością pojawiają się na obszarze Polski, gdzie intensywnie eksploatowano znacznie więcej złóż, a otwory istniały już w XIX w., w okresie kiedy zarówno wiedza o procedurach likwidacji otworów wiertniczych, jak i świadomość znaczenia właściwego uszczelnienia starych otworów były niewielkie.
    Źródło:
    Przegląd Geologiczny; 2018, 66, 6; 379--387
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the hazards of the BAZALY football stadium in Ostrava in terms of environmental impact
    Autorzy:
    Bujok, P.
    Klempa, M.
    Pospíšil, P.
    Rado, R.
    Porzer, M.
    Ryba, J.
    Bláha, M.
    Poláček, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/298663.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    geohazard
    mining fields
    Silesia
    methane migration
    natural environment
    liquidated mines
    concentrations of semimetals
    concentrations of heavy metal
    methane dioxide surface screening
    carbon dioxide surface screening
    ERT method
    GPR method
    monitoring boreholes
    drilling technology
    Opis:
    The term ‘geohazard’ is used to describe the natural and anthropogenic phenomena and processes taking place in the natural environment in the context of their negative influence on natural environment, including the geological one. The degree of geohazard is frequently evaluated on the basis of catalogued descriptions (activity of natural environment and human impact), which help identify particular hazards and ascribe them their value. According to Czech standards, 45 geohazards have been classified and described in detail in view of: geological knowledge, origin and way in which the hazard was evoked, geographical range, time, associated processes, social aspect and monitoring methods. Research works were conducted in a football stadium located in an area of underground hard coal extraction and surface production of raw minerals. The BAZALY stadium, where FC Banik Ostrava played its matches, is located in Ostrava in an area of former mining fields of Silesian Ostrava. These coal mines were closed in the 1990s, but even so they still create environmental hazards. The paper is devoted to research works and risk analysis of the environmental impact of mining activities, old workings and liquidated mines in terms of geohazard. The basic geohazard in the stadium area is methane migration from tectonically disturbed rock mass, also caused by incorrectly closed workings. Another hazard is associated with the increasing mining damage, i.e. tectonic movements, subsidence, local sinkholes, lowering groundwater level etc.
    Źródło:
    AGH Drilling, Oil, Gas; 2017, 34, 4; 933-943
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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