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    Wyświetlanie 1-11 z 11
    Tytuł:
    Cathodoluminescence Profiling for Checking Uniformity of ZnO and ZnCoO Thin Films
    Autorzy:
    Witkowski, B. S.
    Łukasiewicz, M. I.
    Wolska, E. A.
    Kopalko, K.
    Kowalski, B. J.
    Guziewicz, E.
    Godlewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048105.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Gh
    78.30.Fs
    78.60.Hk
    Opis:
    We employ scanning electron microscopy and cathodoluminescence for evaluation of uniformity of ZnCoO films obtained by the atomic layer deposition. Cathodoluminescence quenching by Co ions allows us to detect (regions of weaker light emission) Co accumulations, with the resolution limited by diffusion length of secondary carriers.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 675-677
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mineralogical and geochemical study of thermally altered country rocks of granodiorite intrusion in the Będkowska Valley near Kraków (S Poland)
    Mineralogiczne i geochemiczne badania przeobrażonych termicznie skał otaczających intruzję granodiorytową w Dolinie Będkowskiej koło Krakowa (południowa Polska)
    Autorzy:
    Koszowska, E.
    Wolska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191270.pdf
    Data publikacji:
    2000
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    metamorphism
    thermally altered
    spotted hornfels
    contact aureole
    granodiorite
    cordierite
    andalusite
    Opis:
    Extensive zone of thermally altered sedimentary rocks occurring in the contact aureole of granodiorite intrusion has been described from the boreholes in the Będkowska Valley near Kraków. Depending on the composition of primary rocks and the distance from the intrusion the following metamorphic rocks were formed: fine-grained cordierite hornfelses, macroscopically spotted andalusite hornfelses, chlorite-bearing spotted rocks, metaconglomerates, metasandstones and metamudstones. These rocks consist of various neogenic minerals: cordierite, andalusite, biotite, muscovite, feldspars and corundum. The rocks and neogenic minerals have been investigated in details using optical and electron microscopy, X-ray diffraction, EDS and chemical methods (ICP, INAA, XRF). Characteristic contact metamorphic mineral paragenesis suggests that the most altered rocks in question were formed within temperature range from 580 to 630°C and pressure about 1-2 kbar under conditions corresponding to the orthoclase-cordierite hornfels facies of thermal metamorphism.
    Rozległa strefa przeobrażonych termicznie skał osadowych tworzących aureolę kontaktową dookoła intruzji granodiorytu została opisana z wierceń (otwory DB-5 i WB-102A) usytuowanych w Dolinie Będkowskiej (na północny zachód od Krakowa). W zależności od odległości od intruzji oraz pierwotnego składu mineralnego i chemicznego skał osadowych, podczas metamorfizmu kontaktowego powstały następujące skały: drobnoziarniste hornfelsy kordierytowe, makroskopowo plamiste hornfelsy andaluzytowe, skały plamiste z chlorytem, metazlepieńce, metapiaskowce i metamułowce. W badanych skałach stwierdzono występowanie następujących neogenicznych minerałów: kordierytu, andaluzytu, biotytu, muskowitu, skaleni i korundu. Skały przeobrażone termicznie, oraz ich neogeniczne minerały zostały szczegółowo przebadane mikroskopowo (mikroskop polaryzacyjny i elektronowy), metodą rentgenowską oraz metodami chemicznymi (klasyczna analiza chemiczna, ICP, INAA, XRF oraz EDS i mikrosonda). Obecność w badanych skałach paragenez mineralnych charakterystycznych dla facji ortoklazowo-kordierytowo-hornfelsowej metamorfizmu kontaktowego (według terminologii Winklera) może sugerować zakres temperatur (580-630°C) i ciśnień (1-2 kbar), w którym doszło do najintensywniejszej termicznej transformacji skał osadowych.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2000, 70, No. 3-4; 261-281
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ dodatku mąki i płatków z szarłatu na jakość chleba pszennego
    Influence of amaranth products addition on quality of wheat bread
    Autorzy:
    Wolska, P.
    Ceglinska, A.
    Drabarczyk vel Grabarczyk, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/35480.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    pieczywo
    technologia produkcji
    chleb pszenny
    jakosc pieczywa
    dodatki do zywnosci
    szarlat
    Amaranthus
    maka z szarlatu
    platki z szarlatu
    bread
    production technology
    wheat bread
    bread quality
    food additive
    amaranth
    amaranth flour
    amaranth product
    Opis:
    Celem pracy była ocena jakości pieczywa z dodatkiem produktów z szarłatu. Materiał badawczy stanowiła mąka pszenna typu 750 z młyna w Szymanowie, należącego do „Polskich Młynów”, mąka i płatki z szarłatu wyprodukowane przez PPHU „Szarłat” w Łomży oraz uzyskane chleby. Określono właściwości fizyczno-chemiczne mąki oznaczając: wilgotność, wydajność i jakość glutenu, wskaźnik sedymentacyjny Zeleny’ego, liczbę opadania, a także przeprowadzono analizę farinograficzną i amylograficzną. Produkty z szarłatu dodawano w ilości 5, 10, 15 i 20% w stosunku do mąki. Ciasto chlebowe prowadzono metodą bezpośrednią. Uzyskane z laboratoryjnego wypieku chleby poddano ocenie organoleptycznej i określono cechy, takie jak: strata piecowa, wydajność, objętość, masa właściwa oraz twardość miękiszu. Dodatek płatków z szarłatu nie miał istotnego wpływu na stratę piecową i wydajność uzyskanego chleba, w przeciwieństwie do stosowanego dodatku mąki z szarłatu. Objętość chleba wzrosła przy stosowanych dodatkach mąki z szarłatu, natomiast nie zmieniała się istotnie przy dodatku płatków w ilości 5, 10 i 15%. Twardość miękiszu chleba była większa z dodatkiem płatków niż mąki z szarłatu.
    The aim of the study was to define the influence of Amaranthus products addition on the quality of wheat bread. The experimental material was wheat flour type 750 from Szymanów mill, amaranth flour and flakes from PPHU “Szarłat” from Łomża, and bread obtained from wheat flour. The following physical and chemical properties of wheat flour were determined: moisture, wet gluten and gluten index, sedimentation value, falling number, and the farinographic and amylographic properties were analysed. Amaranth products were added at 5, 10, 15 and 20% (amount relative to wheat flour). The breads obtained in the experimental baking were subjected to sensory analysis, and the following physical properties were determined: baking loss, bread yield, volume of 100 g of bread, absolute weight of crumb and crumb hardness. There was no significant influence of amaranth flakes addition on baking loss and bread yield. The addition of amaranth flour increased the volume of bread, but there was no significant influence of 5, 10 and 15% amaranth flakes addition on this property. Crumb hardness was higher with amaranth flakes addition than with amaranth flour addition.
    Źródło:
    Acta Agrophysica; 2011, 17, 1[188]
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray Absorption Fine Structure Investigation of the Low Temperature Grown ZnCoO Films
    Autorzy:
    Wolska, A.
    Klepka, M.
    Witkowski, B.
    Witkowski, M.
    Guziewicz, E.
    Godlewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1431568.pdf
    Data publikacji:
    2012-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Dm
    75.50.Pp
    68.55.-a
    Opis:
    ZnO based diluted magnetic semiconductors are intensively investigated for possible spintronic applications. In the present work we investigate the ZnCoO layers grown at low temperature by atomic layer deposition. The local atomic structure of a series of layers with different Co concentration is investigated by the X-ray absorption fine structure measurements. Two groups of ZnCoO layers are investigated - the ones with an uniform Co distribution and highly nonuniform films. For uniform samples we observe that a majority of Co atoms is built into the ZnO matrix substituting the Zn atoms. In contrast, for the nonuniform samples, metallic Co inclusions are also observed. These results are in strong correlation with the magnetic properties of the films studied separately. Samples with the uniform Co distribution (Co substitutes Zn in ZnO) are paramagnetic, whereas the nonuniform ones show a ferromagnetic response.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 4; 883-887
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nowe dane o wieku i petrologii kenozoicznych bazaltoidów dolnośląskich
    New data on age and petrological properties of Lower Silesian Cenozoic basaltoids, SW Poland
    Autorzy:
    Badura, J.
    Pécskay, Z.
    Koszowska, E.
    Wolska, A.
    Zuchiewicz, W.
    Przybylski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074475.pdf
    Data publikacji:
    2006
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    bazaltoidy
    petrologia
    geochemia
    kenozoik
    Dolny Śląsk
    basaltoids
    K-Ar dating
    petrology
    geochemistry
    Cenozoic
    Lower Silesia
    SW Poland
    Opis:
    Fifteen samples of basaltoid rocks have been analysed from the Lower Silesia, SW Poland, some of them from localities close to the Sudetic Marginal Fault. K-Ar datings have been made on whole rock samples, using the methodology applied by the Institute of Nuclear Research, Hungarian Academy of Sciences, Debrecen, Hungary. Most of the samples give ages ranging between 21- 38 Ma, whereas that derived from a borehole in the Mokrzeszów Graben has been dated to 44 Ma. Another borehole sample (Jeżów Sudecki B-5), close to the Intrasudetic Fault, is of 59 Ma age. On the other hand, the supposedly "Quaternary" basaltoids from Dębowiec area fall into the interval of 29–30 Ma. The southeasternmost occurrences of the Lower Silesian basaltoids at Nowa Cerekiew display two generations of effusive activity: the older lava flows (26 Ma) are cut by plugs dated to 22 Ma. The Oligocene–Lower Miocene (26-33 Ma, 20'24 Ma) rocks represent alkali basalts and basanites. The alkali basalts consist of phenocrysts of olivine (chrysolite), altered to a different degree, and clinopyroxene (salite). In the matrix, clinopyroxene (Ti-salite), olivine (hyalosiderite), plagioclases (labradorite–andesine), and opaque minerals (titanomagnetite, ilmenite) occur. The basanites contain phenocrysts of altered olivine (chrysolite) and clinopyroxene (salite). Their matrix consists of clinopyroxene (Ti-salites), olivine (hyalosiderite), nepheline, plagioclases (bytownite–andesine), and opaque minerals. On the TAS diagram, samples of the studied basaltoids plot mainly in the fields of basalts and basanites/tephrites. The bimodality of some samples falling into two fields of basalts and basanites/nephelinites on the TiO2/Zr-Nb/y diagram results from their distinct geochemical signature.
    Źródło:
    Przegląd Geologiczny; 2006, 54, 2; 145-153
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Auxin increases the InJMT expression and the level of JAMe–inhibitor of flower induction in Ipomoea nil
    Autorzy:
    Kucko, A.
    Czeszewska-Rosiak, G.
    Wolska, M.
    Glazinska, P.
    Kopcewicz, J.
    Wilmowicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/57436.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    Interactions among jasmonates and auxin in the photoperiodic flower induction of a short-day plant Ipomoea nil were examined. Therefore, we measured changes in jasmonic acid (JA) and jasmonic acid methyl ester (JAMe) levels in the cotyledons of I. nil during the inductive night, as well as the effects of indole-3-acetic acid (IAA) on their content. We noticed an interesting result, that IAA applied on the cotyledons of I. nil is an effective stimulator of JAMe production in seedlings cultivated under inductive night conditions. IAA treatment also significantly increased the transcriptional activity of InJMT (JASMONIC ACID CARBOXYL METHYLTRANSFERASE), while did not affect the expression of JA biosynthesis genes (lipoxyganease, allene oxide synthase, 12-oxophytodienoate reductase). These data, as well as the results of our previous research, suggest that exogenous IAA participates in I. nil flower induction process by stimulating InJMT expression and, as a consequence of that, enhancing the level of JAMe, a flowering inhibitor.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2017, 86, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenotypic and genotypic antimicrobial resistance of staphylococci from bovine milk
    Autorzy:
    Kot, B.
    Piechota, M.
    Wolska, K.M.
    Frankowska, A.
    Zdunek, E.
    Binek, T.
    Klopotowska, E.
    Antosiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31274.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The aim of this study was to examine phenotypic and genotypic antimicrobial resistance of staphylococci from milk samples from cows with subclinical and clinical mastitis and from cows without mastitis symptoms to methicillin, tetracyclines, macrolides and lincosamides (ML). Of 207 strains, including 34 S. aureus and 173 coagulase-negative staphylococci (CNS), 11 (6.4%) CNS strains were phenotypically resistant to methicillin. The mecA gene was detected by PCR only in two S. xylosus strains and one strain of S. epidermidis and S. simulans. No methicillin-resistant S. aureus strains were observed. In methicillin-resistant strains with mecA, gene resistance to other investigated antibiotics was not observed. Phenotypic resistance to tetracycline was detected in 11.0% of CNS strains and 47.4% of them carried the tetK gene. Of 173 CNS strains studied, 27 (15.6%) were resistant to at least one ML antibiotic. The resistance gene ermC was detected in 55.5% of the 27 ML-resistant strains. The ermA and ermB genes were detected in 14.8% and 11.1% of ML-resistant CNS strains, respectively. Antimicrobial resistance to methicillin, tetracyclines and macrolides was detected more frequently in staphylococcal strains from clinical mastitis compared to animals with subclinical symptoms and without mastitis, while the resistance to lincosamides showed a similar frequency in all groups of cows. In conclusion, CNS species from bovine milk differ in phenotypic and genotypic antimicrobial resistance profiles, and the use of PCR technique alone for the detection of methicillin, macrolide, lincosamide and tetyracycline resistance in CNS from cattle is not reliable.
    Źródło:
    Polish Journal of Veterinary Sciences; 2012, 15, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Occurrence of intestinal microsporidia in immunodeficient patients in Poland
    Autorzy:
    Bednarska, M.
    Bajer, A.
    Sinski, E.
    Wolska-Kusnierz, B.
    Samolinski, B.
    Graczyk, T.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/51622.pdf
    Data publikacji:
    2014
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2014, 21, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antimicrobial resistance and genotypes of staphylococci from bovine milk and the cowshed environment
    Autorzy:
    Kot, B.
    Piechota, M.
    Antos-Bielska, M.
    Zdunek, E.
    Wolska, K.M.
    Binek, T.
    Olszewska, J.
    Gulinski, P.
    Trafny, E.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/30335.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Investigation of antimicrobial resistance and genetic relatedness of staphylococci from milk of cows with mastitis and cowshed environment was the aim of this study. Antimicrobial resistance against 14 antimicrobials were determined by using a disc diffusion method. Genetic similarity between the most frequently isolated species was analysed by PFGE (pulsed-field gel electrophoresis). Haemolytic activity, DNase, protease and esterase production was also investigated. Coagulase-negative Staphylococcus species were isolated from 30.8% of milk samples from cows with mastitis. The most frequently isolated species was Staphylococcus xylosus and yield of these organisms was significantly associated with milk of mastitis cows. S. epidermidis was a predominant penicillin-resistant species. High frequency of resistance to lincomycin was observed among isolates of S. sciuri (54.2%) and S. xylosus (25.9%) from cows with mastitis. PFGE (pulsed-field gel electrophoresis) analysis of 29 Staphylococcus aureus isolates showed the presence of 17 PFGE pulsotypes. Isolates of S. sciuri (n=36) had unique PFGE patterns. Some S. xylosus isolates from milk and milker’s hands had the same PFGE pulsotypes, and this observation could indicate that dairyman may be a potential source of the infection. The pulsotype of each of the remaining isolates of S. xylosus suggested that they might have come from common environmental sources; however, these isolates differed in antibiotic resistance pattern or virulence traits. Therefore, knowledge about antibiotic sensitivity pattern and virulence factors of a CNS isolate, besides its genotype, may be informative in tracking the source of the infection.
    Źródło:
    Polish Journal of Veterinary Sciences; 2012, 15, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    XANES Studies of Mn K and $L_{3,2}$ Edges in the (Ga,Mn)As Layers Modified, by High Temperature Annealing
    Autorzy:
    Wolska, A.
    Lawniczak-Jablonska, K.
    Klepka, M.
    Jakieła, R.
    Demchenko, I.
    Sadowski, J.
    Holub-Krappe, E.
    Persson, A.
    Arvanitis, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812244.pdf
    Data publikacji:
    2008-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.70.Dm
    75.50.Pp
    Opis:
    $Ga_{1-x}Mn_xAs$ is commonly considered as a promising material for microelectronic applications utilizing the electron spin. One of the ways that allow increasing the Curie temperature above room temperature is to produce second phase inclusions. In this paper $Ga_{1-x}Mn_xAs$ samples containing precipitations of ferromagnetic MnAs are under consideration. We focus on the atomic and electronic structure around the Mn atoms relating to the cluster formation. The changes in the electronic structure of the Mn, Ga and As atoms in the (Ga,Mn)As layers after high temperature annealing were determined by X-ray absorption near edge spectroscopy. The experimental spectra were compared with the predictions of ab initio full multiple scattering theory using the FEFF 8.4 code. The nominal concentration of the Mn atoms in the investigated samples was 6% and 8%. We do not observe changes in the electronic structure of Ga and As introduced by the presence of the Mn atoms. We find, in contrast, considerable changes in the electronic structure around the Mn atoms. Moreover, for the first time it was possible to indicate the preferred interstitial positions of the Mn atoms.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 2; 357-366
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and characterization of ZnO-PMMA resin nanocomposites for denture bases
    Autorzy:
    Cierech, M.
    Wojnarowicz, J.
    Szmigiel, D.
    Bączkowski, B.
    Grudniak, A. M.
    Wolska, K. I.
    Łojkowski, W.
    Mierzwińska-Nastalska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/307186.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    nanocząstka ZnO
    Candida albicans
    polimery akrylowe
    ZnO nanoparticles
    acrylic resins
    Opis:
    Purpose: The aim of the paper was to investigate the antifungal activity of zinc oxide nanoparticles (ZnONPs) against Candida albicans. Some attempts have been made to find out the best way to introduce ZnONPs into polymethyl methacrylate (PMMA) resin material and to determine some parameters of a newly formed composite. Material and methods: Zinc oxide nanoparticles were manufactured and their basic physical parameters were determined (average particle size, density, specific surface area). Minimal inhibitory concentration (MIC) of ZnONPs was determined for the Candida albicans standard strain. The average size of ZnO conglomerates in the monomer solution of PMMA resin was measured using a dynamic light scattering instrument. PMMA resin samples with incorporated ZnONPs were produced. The morphology of nanopowder and the newly formed composite was examined under a scanning electron microscope (SEM). In addition, the roughness parameter of PMMA resin material was investigated before and after ZnONPs modification. Results: Nanopowder with the average particle size of 30 nm, density of 5.24 g/cm3 and surface area of 39 m2 /g was obtained. MIC was determined at the level of 0.75 mg/mL. The average size of ZnO conglomerates in the monomer solution of acrylic resin dropped by 11 times after ultrasound activation. SEM examination of a newly formed composite showed a successful introduction of ZnONPs confirmed by the energy dispersive X-ray spectroscopy (EDS) analysis. There were no statistically significant differences in the biomaterial roughness before and after the modification of ZnONPs. Conclusion: Zinc oxide nanoparticles were successfully incorporated into acrylic resin used for the production of denture bases. The presence of nanoparticles with sizes below 100 nm was confirmed. Nevertheless a newly created composite needs to be further investigated to improve its homogeneity, and to check its microbiological properties, strength and biocompatibility prior to its possible clinical use.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2016, 18, 2; 31-41
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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