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    Wyświetlanie 1-9 z 9
    Tytuł:
    The use of IR thermography for testing the operation parameters of water radiant ceiling systems for heating
    Autorzy:
    Sornek, K.
    Gradzik, I.
    Rzepka, K.
    Filipowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/114128.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    IR thermography
    radiant ceiling system for heating
    Opis:
    This paper shows the possibility of the use of IR thermography for testing the operational parameters of water radiant ceiling systems for heating. The study showed positive results regarding the efficiency of different types of ceiling panels in a function of the level of homogeneous surface temperature distribution. Experimental results were supplemented by theoretical calculations performed with the use of a special equation originally dedicated to sun collector calculations.
    Źródło:
    Measurement Automation Monitoring; 2015, 61, 6; 228-232
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and characterization of SiO2/silane/POSS functional hybrids
    Autorzy:
    Szwarc-Rzepka, K.
    Szatkowski, T.
    Ciesielczyk, F.
    Jesionowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/110647.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    SiO2/silane/POSS hybrids
    silica support
    silsesquioxanes cage
    bifunctionalization process
    Opis:
    Novel SiO2/silane/POSS functional hybrids have been synthesized via an immobilization method. Hybrid materials were obtained through a connection of emulsion silica with defined dispersive and morphological properties with (3-isocyanatepropyl)triethoxysilane and selected mono- or octasubstituted POSS compounds in organic solvent. Modification effectiveness of the obtained SiO2/silane/POSS hybrid systems was confirmed with the use of the Fourier transform infrared spectroscopy (FTIR). In order to determine the influence of bifunctionalization on coverage degree of the selected POSS compounds, elemental analysis (C, H, N contents) was performed. Moreover, parameters of porous structure of the obtained products were determined: BET surface area, total volume and mean size of pores. During analysis the thermal stability of silsesquioxanes cage, unmodified silica support, and hybrid systems have been investigated. For this purpose dispersive and morphological characterization (particle size distribution and TEM images) was performed.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 2; 673-687
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Advanced biocomposites based on silica and lignin precursors
    Autorzy:
    Klapiszewski, Ł.
    Nowacka, M.
    Szwarc-Rzepka, K.
    Jesionowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/110719.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    biocomposites
    silica
    lignin
    physicochemical and structural properties
    Opis:
    A new method is proposed for obtaining biocomposites based on a combination of silica and lignin precursors. Amorphous silica was produced by two methods: one based on hydrolysis and condensation of tetraethoxysilane (sol–gel method) and the other involving precipitation in a polar medium. Additionally, the commercial silica known under the name of Syloid®244 was used. The silica surface was modified to ensure better affinity of the support to activated lignin. The biocomposites obtained were carefully characterised by determination of their physicochemical and dispersive–morphological properties. Electrokinetic stability of the biocomposites was evaluated on the basis of zeta potential dependence on pH. Thermal stability of the biocomposites and their porous structure parameters (surface area, pore diameter and pore volume) were established. The results indicate that silica/lignin biocomposites are much promising for application in many areas of science and industry.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 2; 497-509
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and physicochemical characterization of silicafillers modified with octakis({3-methacryloxypropyl}dimethylsiloxy) octasilsesquioxane
    Autorzy:
    Szwarc-Rzepka, K.
    Gogola, N.
    Siwińska-Stefańska, K.
    Marciniec, B.
    Jesionowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/778960.pdf
    Data publikacji:
    2013
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    octasilsesquioxane
    silica
    functionalization
    hybrid nanofillers
    Opis:
    Hybrid nanofillers of silica grafted with octakis({3-methacryloxypropyl}dimethylsiloxy) octasilsesquioxane were obtained by the method based on solvent evaporation with the use of both hydrated or emulsion spherical silica. Octakis({3-methacryloxypropyl}dimethylsiloxy) octasilsesquioxane was applied as a modifying agent and it was synthesized by employing the hydrosilylation reaction. The effectiveness of modification of the hybrid nanofillers obtained was verified using Fourier transform infrared spectroscopy and nuclear magnetic resonance (29Si and 13C CP MAS NMR). The products obtained were characterized by determination of their physicochemical properties and porous structure, including specific surface area, pore diameter and pore volume. Dispersion degree and particle size of the nanofillers was characterized by NIBS (Non-Invasive Back-scatter) method and laser diffraction technique, while their morphology by transmission electron microscopy.
    Źródło:
    Polish Journal of Chemical Technology; 2013, 15, 4; 15-23
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of hydroxyapatite/chitosan composites
    Autorzy:
    Szatkowski, T.
    Kołodziejczak-Radzimska, A.
    Zdarta, J.
    Szwarc-Rzepka, K.
    Paukszta, D.
    Wysokowski, M.
    Ehrlich, H.
    Jesionowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/109806.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hydroxyapatite
    chitosan
    composite
    one-step co-precipitation
    Opis:
    Hydroxyapatite (HAp)/chitosan (CS) composites were synthesized via a one-step co-precipitation method from aqueous solution, with the use of calcium chloride (CaCl2) and disodium hydrogen phosphate (Na2HPO4). CS was obtained via partial deacetylation of chitin with the use of strong sodium hydroxide solution. Composites were prepared with various HAp/CS ratios (30/70, 50/50, 70/30, 85/15) for comprehensive comparison of their properties. Fourier Transform Infrared Spectroscopy (FT-IR) analysis showed that hydrogen bonds were formed between the organic matrix and the mineral compound, confirming a successful phase interconnection. X-ray diffraction patterns were obtained, enabling examination of the crystalline properties of the composites, including HAp identification. The porous structure parameters of the composites were investigated, and morphological analysis (SEM) was performed. Differential Thermal Gravimetry (DTG) analysis of the composites indicated that the material is thermally stable up to 200 oC. Additionally, Energy Dispersive Spectroscopy (EDS) analysis of the mineral was carried out to check the Ca/P ratio, and confirmed its similarity to pure HAp.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2015, 51, 2; 575-585
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic similarity of chosen Syringa species determined by the ISSR-PCR technique
    Autorzy:
    Rzepka-Plevnes, D
    Smolik, M.
    Tanska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/41611.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Przelewice Dendrological Garden
    genetic variability
    Syringa
    lilac
    genetic diversity
    taxonomy
    ISSR technique
    polymerase chain reaction
    Opis:
    Inter-simple sequence repeat (ISSR) amplification was used to analyze polymorphism of microsatellite sequences in the lilacs genom and to evaluate genetic diversity among seven lilacs species (Syringa × prestoniae McKelvey., S. reflexa K.C. Schneid., S. villosa Vahl, S. × chinensis Willd., S. meyeri K.C.Schneid., S. vulgaris L.and S. reticulata (Blume) var. amurensis (Rupr.)). The plant material was originated from the collection of Dendrological Garden in Przelewice.A total of 30 primers, containing different simple sequence repeat motifs were tested for amplification.Out of the 30 primers only 13 gave interpretable banding patterns in all lilacs species.A total of 182 ISSR fragments were generated with 13 primers of which 109 (60%) were polymorphic and 57 (31.2%) species-specific. ISSR–PCR with genomic DNAs of the showed lilacs yielded DNA fragmets ranging form 2200 to 123 bp in size.Species-specific ISSR fragments were detected for each lilacs accessions.UPGMA cluster analysis was used to construct a dendrogram and to estimate the genetic distances between lilacs species.The ISSR-based phylogeny was generally consistent with Syringa taxonomy based on morphological and phenological evidence.
    Źródło:
    Dendrobiology; 2006, 56; 61-67
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of growth regulators and culture conditions on the callus induction in tomato Lycopersicon sp.
    Wpływ roślinnych regulatorów wzrostu i warunków prowadzenia kultury na indukcję kalusa u Lycopersicon sp.
    Autorzy:
    Rzepka-Plevneš, D.
    Kulpa, D.
    Grabiec, M.
    Kowalczys, K.
    Kurek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/11364553.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    cotyledon
    darkness
    light
    tomato
    growth regulator
    Lycopersicon
    callus induction
    culture condition
    Opis:
    Effect of auxins: (NAA, IAA), cytokinin BAP and culture conditions (light, darkness) on callus induction in cotyledons of tomato cultivar ‘Maskotka’ and the wild form of Lycopersicon peruvianum was investigated. Callus was obtained in all experimental combinations, except of the culture with L. peruvianum on the medium with 1.0 mg⋅dm⁻³ of IAA. Callus weight, colour and structure depended on the tomato genotypes and experimental conditions. Best medium for the culture of tomato cultivar ‘Maskotka’ and the wild form L. peruvianum proved to be MS medium supplemented with 2.0 mg⋅dm⁻³ of IAA and 1.0mg⋅dm⁻³ of BAP.
    W pracy określono wpływ auksyn (NAA i IAA) i cytokininy BAP oraz warunków kultury (światło, ciemność) na tworzenie się kalusa na liścieniach odmiany uprawnej pomidora ‘Maskotka’ oraz formy dzikiej Lycopersicon peruvianum. Indukcję kalusa obserwowano u obu badanych form niezależnie od składu hormonalnego pożywki, za wyjątkiem kombinacji, z auksyną IAA w ilości 1.0 mg⋅dm⁻³. Masa, zabarwienie i struktura otrzymanego kalusa zależały od genotypu badanych form pomidora oraz od warunków prowadzenia kultury. Inicjacja kalusa pomidora odmiany ‘Maskotka’ i L. peruvianum powinna odbywać się na pożywce MS uzupełnionej 2,0 mg dm⁻³ IAA i 1,0 mg dm⁻³ BAP.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2006, 05, 2; 23-34
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of technological parameters of cementing slurries for horizontal casing works in Pomeranian Basin
    Autorzy:
    Stryczek, S.
    Wiśniowski, R.
    Kotwica, Ł.
    Złotkowski, A.
    Rzepka, M.
    Kremieniewski, M.
    Skrzypaszek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/299052.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    cement slurries
    horizontal casing works
    Opis:
    Paper presents results of investigation on the properties of cement slurries used in casing works in horizontal wells. Six slurries were investigated. Each slurry was optimized to fulfill the demands of a particular well drilled in Pomeranian Basin in northern Poland. Slurries were designed the way to obtain flow diameter in the range 240-270 mm and exhibiting no sedimentation. Special emphasis was put on the stability of the slurries, due to high requirements for stability of slurries used in casing works in horizontal wells. Slurries were cured in conditions characteristic for particular wells (pressure in the range between 35 and 49 MPa, temperature in the range between 80 and 90 degrees of Celsius). For hardened slurries mechanical properties were determined. Phase composition of hardened slurries was determined with XRD and thermal analysis. In addition microstructural observations were done in order to determine the influence of temperature on microstructure of hardened cement matrix.
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 2; 431-442
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dermacentor reticulatus (Fabricius, 1794) and Babesia canis (Piana et Galli-Valerio, 1895) as the parasites of companion animals (dogs and cats) in the Wroclaw area, south-western Poland
    Autorzy:
    Krol, N.
    Kiewra, D.
    Lonc, E.
    Janaczyk, B.
    Chodorowska-Skubiszewska, A.
    Dzieciol, M.
    Gola, M.
    Gruszka, R.
    Jackowska-Szlachcic, E.
    Jagiello, M.
    Kawski, S.
    Lukaszewski, Z.
    Mizgalski, P.
    Narajowska, T.
    Niedzielska, J.
    Noczynski, M.
    Rudkowska, M.
    Rzepka, D.
    Samulska, K.
    Senze, M.
    Sieczko, P.
    Silny, A.
    Staniewska, A.
    Stanczyk, J.
    Stanczyk, W.
    Stasiak, M.
    Wlodarczyk, M.
    Zimniak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/6581.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    Tests performed in 2013 and 2014 revealed the occurrence of three tick species parasitizing pet cats and dogs in the Wrocław Agglomeration. In total, 1,455 tick specimens were removed from 931 hosts (760 dogs and 171 cats) in 18 veterinary clinics. The dominant tick species was Ixodes ricinus (n=1272; 87.4%), followed by I. hexagonus (n=137; 9.4%) and Dermacentor reticulatus (n=46; 3.2%). Females were the most often collected development stage among I. ricinus and D. reticulatus, and nymphs among I. hexagonus. Additionally, D. reticulatus ticks (n=337) were then collected from vegetation in the Wrocław area to detect Babesia canis; however, none was found positive. Only 9.0% of dog blood samples sent to VETLAB were positive for Babesia spp. Negative results for B. canis from ticks may result from the short period of the occurrence of D. reticulatus in the Wrocław area and therefore the vectorpathogen cycle may not have been fully established at the time of the study. Nevertheless, D. reticulatus is expanding its range, and the size of its population in the Wrocław Agglomeration is increasing. The presence of the pathogenic Babesia spp. combined with the occurrence of its main vector¸ D. reticulatus, suggests that the epizootiological situation in the area can change and may pose a new veterinary problem in the future.
    Źródło:
    Annals of Parasitology; 2016, 62, 2
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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