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Wyszukujesz frazę "Knapik, E." wg kryterium: Autor

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    Wyświetlanie 1-9 z 9
    Tytuł:
    Laboratory experiments for crude oil removal from water surface using hydrophobic nano-silica as sorbent
    Autorzy:
    Knapik, E.
    Stopa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/299141.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    oil sorbent
    hydrophobicity
    nano-silica
    batch adsorption
    Opis:
    Nanomaterials have a great potential for the possible oil spill cleanup due to their unique wettability characteristics and large surface area. This work reports investigations on oil sorption behavior of a commercially available hydrophobic nano-silica when tested with a light paraffinic crude oil and a heavy aromatic crude oil. Sorption experiments were carried out in batch sorption system under static and dynamic conditions. Influence of mass of sorbent, sorption time, temperature and pH value of water on sorption capacity were tested and compared to find an optimal operational conditions for adsorption process. Nanopowder exhibited high selectivity for absorbing oil from water; a removal efficiency found by gravimetric method was high as 96% to 99%. The sorption capacity inereases with the inerease of sorption time and mass of sorbent. Nano-silica powder was found to be effective sorbent material as compared to widely used synthetic fibers
    Źródło:
    AGH Drilling, Oil, Gas; 2014, 31, 2; 281-289
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zgazowanie węgla czystą technologią węglową
    Coal gasification using clean coal technology
    Autorzy:
    Machowska, H.
    Knapik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1286629.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
    Tematy:
    zgazowanie
    węgiel
    energetyka
    gasification
    coal
    power engineering
    Opis:
    W artykule przedstawiono proces zgazowania jako podstawę nowych czystych technologii wykorzystania węgla. Dokonano analizy aktualnej sytuacji na światowych rynkach węgla oraz omówiono technologiczne i środowiskowe aspekty procesu zgazowania.
    The paper presents the gasification process as the foundation of new "clean" coal technologies. The current situation on global coal market was assessed and the technological and environmental aspects of the gasification process were discussed.
    Źródło:
    Chemik; 2011, 65, 10; 946-953
    0009-2886
    Pojawia się w:
    Chemik
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of multifunctional fluids to improve hydrocarbon production
    Autorzy:
    Knapik, E.
    Stopa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/299010.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    foam
    gas wells dewatering
    corrosion inhibitor
    synergism
    Opis:
    In the course of the mature gas fields exploitation there are many technical problems including the corrosion damage, formation of hydrates and water cut. In many cases, an effective solution of these problems is the dosage of appropriately selected chemicals. Commercially available corrosion inhibitors, hydrate inhibitors, demulsifiers and foaming agents are injected in a form of single, multifunctional mixture through one liner which reduces injection costs. The paper presents the results of laboratory tests, which aim was to investigate synergism and antagonism in multifunctional mixture containing different commercially available surfactants, corrosion and hydrate inhibitors. Correlations between final product composition and performances such as liquid unloading efficiency, corrosion protection and pour point were studied. The described approach allows to adapt the tertiary mixture composition (foaming agent + corrosion inhibitor + hydrates inhibitor) to the current production conditions. The polarization behavior of electrodes in brines with and without mixture of additives has been studied by a cyclic voltammetric method. The addition of increasing concentrations of each chemicals causes the reduction in the corrosion current density. The measurements using a modified method of the US Bureau of Mines show synergistic effect of surfactants and corrosion inhibitor on foamabilities. Multifunctional mixtures are stable under storage conditions and not cause any compatibility problems with reservoir fluids.
    Źródło:
    AGH Drilling, Oil, Gas; 2013, 30, 1; 117-125
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Foams Stabilized with Nanoparticles for Gas Well Deliquification
    Autorzy:
    Knapik, E.
    Stopa, J
    Marzec, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778429.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    foam
    foamability
    solid nanoparticles
    surfactant
    Opis:
    This study examined the interaction of solid nanoparticles and anionic and non-ionic surfactant at an air–water interface. Aqueous foams stabilized by silica nanoparticles in water with different levels of salinity were studied in detail. The stability of solid/surfactant dispersion was evaluated visually. Nanoparticles content impact and concentration of surfactant on the foamability, deliquification of foams and structure of wet foams were studied. It was found that the foamability of dispersion depends either on the surfactant concentration or on the nanoparticles concentration. The adsorption of hydrophobically modified silica particles and surfactants reduces the air/water interface tension. The results of the examinations showed that the use of nanoparticles allows to increase the efficiency of brine unloading even up to 20%. Surfactant particle and nanosilica present synergistic action, use of 4 wt% of nanoparticles allows to reduce surfactant consumption up to half. The cost of the preparation of the proposed dispersion is slightly higher, about 5%, compared to the sole surfactant.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 2; 114-117
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of capillary trapping during geologic CO2 sequestration
    Autorzy:
    Knapik, E.
    Janiga, D.
    Wojnarowski, P.
    Stopa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/298959.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    capillary trapping
    CO2 sequestration
    relative permeability hysteresis
    Opis:
    Capillary trapping is thought to be one of the primary CO2 fixing mechanisms in a porous medium when it is stored. While CO2 is injected, gas displaces formation water (brine) in the process called drainage. In the case of the rock mass wetted by water, formation water remains adsorbed in wall pores and micropores. Once the injection process has been completed, gas is displaced by the natural water in the process referred to as imbibition. In that way CO2, being a non-wetting phase, is held in the form of dispersed bubbles as an immobile phase. The process occurs fast and allows for a regular storage of large amounts of CO2. The process is dependent upon numerous parameters, including capillary pressure and contact angle, but such measurements cannot be easily taken for rock cores in reservoir conditions. Another problem is the fact that it is difficult to separate the impact of such mechanisms as dissolution and mineral trapping. So far capillary trapping has been deeply analyzed in terms of hydrocarbon recovery and contaminant remediation. The goal of this article is to:– present a physiochemical basis of capillary trapping in CCS context,– simulate the impact of relative permeability hysteresis on geological CO2 storage.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 4; s. 657-669
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil contamination by petroleum substances in the vicinity of oil production wells
    Autorzy:
    Wartak, J.
    Chruszcz-Lipska, K.
    Knapik, E.
    Rychlicki, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/298844.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    oil exploitation
    soil contamination
    petroleum substances
    BTX
    PAHs
    environmental protection
    Polska
    Opis:
    The paper presents the study of various indicators of soil contamination by petroleum substances from the area of active exploitation of oil deposits in the south of Poland. Nineteen studied soil samples were taken directly around the production wells (0–1 m) or their vicinity (1–7 m) at a depth of 0.1 to 0.3 m. Collected samples were tested for the presence of benzene, toluene and xylene (BTX), and polycyclic aromatic hydrocarbons (PAHs) such as phenanthrene, anthracene, fluoranthene, fluorene, pyrene, benzo(a)anthracene, chrysene, benzo(a)pyrene, dibenz(a,h)anthracene and benzo(g,h,i)perylene. An analysis of the content of these chemical compounds in the soil samples was performed by gas chromatography. The observed results were interpreted to determine the hazard for the natural environment and human health. The evaluation of soil samples was based on the new Regulation of the Ministry of Environment of 1 September 2016 regarding the assessment of contamination of the surface of the earth (Journal of Laws 2016 Nr 0, item 1395) as well as guidelines presented by the Institute of Soil Science and Plant Cultivation (ISSPC).
    Źródło:
    AGH Drilling, Oil, Gas; 2016, 33, 4; 723-731
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the quality of surface water from selected area of active oil exploitation
    Autorzy:
    Chruszcz-Lipska, K.
    Knapik, E.
    Rychlicki, S.
    Stopa, J
    Powiązania:
    https://bibliotekanauki.pl/articles/299237.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    surface water
    oil exploitation
    quality of water
    chemistry of water
    environment protection
    Opis:
    In this work, the studies of various physico-chemical parameters of surface waters originated from the selected area of oil exploitation in the south of Poland are presented. The water samples were collected from streams and ponds or directly from surface tanks situated in the vicinity of operating wells. The observed values of different parameters like pH, odór, color, turbidity, electroconductivity, concentration of sulfate, chloride, nitrate, iron, calcium, magnesium, ammonium, alkanity, dissolved oxygen or petroleum contamination of samples were compared with standard values recommended by the WHO (World Health Organization) and the relevant Polish Regulation. Preliminary studies show that investigated surface waters are slightly affected by anthropogenic pollution. The main two sources of contamination of water from the study area are agriculture and mining industry.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 1; 65-76
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low doses of fenofibrate and bezafibrate stimulate renal 2-oxoglutarate dehydrogenase (2-OGDH) in protein-restricted rats
    Autorzy:
    Knapik-Czajka, Malgorzata E.
    Drag, Jagoda M.
    Gawedzka, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/895613.pdf
    Data publikacji:
    2020-04-29
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    2-oxoglutarate dehydrogenase
    Fenofibrate
    Bezafibrate
    kidney
    Opis:
    2-oxoglutarate dehydrogenase (2-OGDH) is the key regulatory enzyme of cell metabolism. It has been previously demonstrated that in rats subjected to protein restriction low, clinically relevant doses of fibrates up-regulate liver 2-OGDH and promote 2-oxoglutarate catabolism. The aim of the present study was to evaluate the effect of low doses of fenofibrate and bezafibrate on renal 2-OGDH complex in rats fed low-protein chow. Fibrates were administrated for 14 days to Wistar male rats at one daily doses of 5, 10 and 20 mg/kg b.wt./day. The 2-OGDH activity was assayed spectrophotometrically. The mRNA levels for 2-OGDH catalytic subunits (E1 and E2) and PPARα were quantified by means of semi-quantitative reverse-transcription-PCR. 2-OGDH activity increased in response to administration of fenofibrate and bezafibrate (by 11, 24, 32% and 9, 12, 21%, respectively). The difference was statistically significant for the doses of 10 and 20 mg/kg b.wt of fenofibrate (p<0.001) and the highest dose of bezafibrate (p<0.05). Stimulation of 2-OGDH was not accompanied by changes in mRNA levels for E1 and E2. In addition, mRNA level for PPARα did not change. It is conceivable that fibrate-induced stimulation of 2-OGDH activity can affect renal metabolism and contribute to changes in kidney functions.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2020, 77, 2; 281-288
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena natężenia dolegliwości bólowych oraz jakości samopoczucia osób po 50 roku życia posiadających i nieposiadających psa
    Assessment of pain intensity and quality of well-being of people over 50 years of age who own dogs and those who do not
    Autorzy:
    Myśliwiec, A.
    Knapik, A.
    Saulicz, E.
    Kuszewski, M.
    Wolny, T.
    Poledniok, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/271542.pdf
    Data publikacji:
    2012
    Wydawca:
    Górnośląska Wyższa Szkoła Pedagogiczna im. Kardynała Augusta Hlonda
    Tematy:
    aktywność fizyczna
    zespoły bólowe kręgosłupa
    physical activity
    pain of spine
    Opis:
    Wstęp: Około 80% populacji w wieku poprodukcyjnym miewa problemy zdrowotne ze strony różnych narządów. Dolegliwości te nasilają się wraz z wiekiem, kiedy to człowiek ulega bradykinezji, pojawia się lęk przed podejmowaniem aktywności fizycznej, a w konsekwencji nadwaga, cukrzyca, choroby układu krążenia i inne schorzenia ustrojowe. Postanowiono zbadać, czy osoby posiadające psa, cechują się lepszym samopoczuciem oraz mniejszymi dolegliwościami bólowymi kręgosłupa w porównaniu z osobami nieposiadającymi psa. Materiał i metody: W badaniach wzięło udział 100 osób w wieku od 50 do 81 lat, mieszkających w Piekarach Śląskich, będących na emeryturze lub rencie, nie pracujących zawodowo, deklarujących swój stan zdrowia jako dobry, niezgłaszających żadnych chorób przewlekłych. Osoby uczestniczące w badaniach zostały poproszone o wypełnienie kwestionariusza ankiety, w którym zapytano o płeć, wiek oraz o własną ocenę samopoczucia. Pacjent zaznaczał na osi miejsce, które najbardziej odpowiadało jego odczuciom. Wartość 0% odpowiadała ocenie samopoczucia na najgorszym do wyobrażenia poziomie, zaś wartość 100%, odpowiadała sytuacji idealnej. Kolejnym obszarem badania było natężenie dolegliwości bólowych zlokalizowanych w szyjnym i lędźwiowym odcinku kręgosłupa, w oparciu o kwestionariusz Oswestry. Wnioski: Osoby posiadającej psa wskazały na lepsze samopoczucie niż osoby nieposiadające psa. W grupie osób posiadających psa stwierdzono niższe natężenie dolegliwości bólowych lędźwiowego odcinka kręgosłupa w porównaniu z osobami nie posiadającymi psa.
    Introduction: About 80% of the population of post-working age experience various organ-related health problems. These ailments tend to intensify with age when a person develops bradykinesia and the fear of taking up physical activity appears, which in consequence leads to weight gain, diabetes, cardiovascular system diseases and other systemic diseases. It was decided to evaluate if it is characteristic for people who own dogs to be in a better state of well-being and experience less spine pain in comparison to people who do not own dogs. Material and methods: The study involved 100 people ranging in age from 50 to 81 years living in Piekary Sląskie, retired or on a disability benefit, not working professionally, declared to be in good health, and reporting no chronic diseases. Those who took part in the research were asked to complete a questionnaire in which the respondents were asked to state their gender, age and to make a personal evaluation of their general state of well-being. The patients were to mark on an axis the point which most closely corresponded to their own assessments. The value of 0% represented the worst possible assessment of their general state of well-being, while 100% represented the ideal situation. Another area of the research concerned the intensification of cervical and lumbar spine pain and was evaluated by means of the Oswestry Disability Index. Conclusions : People who own dogs showed to be in a better state of well-being than people who do not have dogs. In the group of people who owned dogs, a lower intensification of lumbar spine pain was observed, in comparison to people who do not have dogs.
    Źródło:
    Journal of Ecology and Health; 2012, R. 16, nr 3, 3; 150-154
    2082-2634
    Pojawia się w:
    Journal of Ecology and Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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