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    Tytuł:
    Ocena analizatora równowagi kwasowo-zasadowej 1304 pH Blood Analyzer produkcji firmy Instrumentation Laboratory
    Ocenka analizatora kislotno-shhelochnogo ravnovesti 1304 pH Blood Gas Analyzer firmy Instrumentation Laboratory
    Assessment of the 1304 pH blood gas analyzer produced by Instrumentation Laboratory
    Autorzy:
    Bartnikowska, E.
    Barszczewska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2187824.pdf
    Data publikacji:
    1986
    Wydawca:
    Polskie Towarzystwo Diagnostyki Laboratoryjnej
    Źródło:
    Diagnostyka Laboratoryjna; 1986, 22, 2-3; 127-132
    0867-4043
    Pojawia się w:
    Diagnostyka Laboratoryjna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The novel semi-biodegradable interpenetrating polymer networks based on urethane-dimethacrylate and epoxy-polyester components as alternative biomaterials
    Autorzy:
    Barszczewska-Rybarek, I.
    Jaszcz, K.
    Jurczyk, S.
    Chladek, G
    Powiązania:
    https://bibliotekanauki.pl/articles/306686.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    analiza dynamiczno-mechaniczna
    materiał porowaty
    biodegradacja
    interpenetrating polymer networks
    urethane-dimethacrylates
    epoxy-polyesters
    dynamic mechanical analysis
    porous biomaterials
    biodegradation
    Opis:
    Purpose: This paper presents the pilot study aimed at the development of new full interpenetrating polymer networks based on urethane-dimethacrylate and biodegradable epoxy-polyester as the proposition of new biomaterials with gradually emerging porosity. Methods: The urethane-dimethacrylate monomer was obtained from 4,4’-methylenebis(phenyl isocyanate) and tetraethylene glycol monomethacrylate. The redox-initiating system was employed for its radical polymerization. The epoxy-polyester was produced by oxidation of the polyester, synthesized from succinic anhydride and allyl glicydyl ether. It was cured in a step-growth process with biogenic, aliphatic amine – spermidine. The mixtures of both monomers with adequate curing agents were room temperature polymerized. The hardened materials were characterized for damping behavior and dynamic modulus, hardness, water sorption, the course of hydrolytic degradation as well as the morphology – before and during the degradation process. Results: The cured materials revealed the nonporous, dense morphology. In the hydrolytic environment, the epoxy-polyester network degraded and the porous urethane-dimethacrylate scaffold remained. The epoxy-polyester appeared to prevent the urethane-dimethacrylate from attaining a high degree of conversion, even if the polymerization rate and the molecular mobility of the latter one are higher than those of the epoxy-polyester. The most homogeneous material with the best physico-mechanical properties was obtained when the urethane-dimethacrylate content was smaller than the epoxy-polyester content, respectively 25 and 50 wt%. Conclusions: The system presented in this work could be useful in tissue engineering, where at the beginning of the tissue regeneration process it would meet the implant mechanical properties and then would deliver its porosity, facilitating the tissue regeneration process.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 3; 13-22
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DMA analysis of the structure of crosslinked poly(methyl methacrylate)s
    Autorzy:
    Barszczewska-Rybarek, I. M.
    Korytkowska-Wałach, A.
    Kurcok, M.
    Chladek, G.
    Kasperski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/307446.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    PMMA
    moduł sprężystości
    DMA
    parametry sieciowe
    corosslink density
    network parameters
    storage modulus
    glass temperature
    Opis:
    Purpose: This paper presents the study aimed at the development of crosslinked poly(methyl methacrylate)s (X-PMMA) of varied crosslink density and the investigation of the relationships between the polymer network structure and dynamic mechanical properties. Methods: A series of model X-PMMA networks were crosslinked by the introduction of: 1, 2, 5, 10 and 20% of triethylene glycol dimethacrylate (TEGDMA). The copolymerizations led to various glass-rubber relaxation properties of the polymer networks, as revealed by dynamic-mechanical analysis (DMA). Glass temperature (Tg) and storage modulus above the Tg ( ) Erubbery were a sensitive function of network architecture. DMA data were used for calculating the network parameter (Mc), crosslink density (q) and its alternative measure – the degree of crosslinking (DX). Results: The viscoelastic properties as well as structural parameters calculated from those showed correlation with the amount of the crosslinker. The increase in TEGDMA content resulted in the Tg, q and DX increases, whereas Mc decrease. The possible incomplete conversion of double bonds was detected in the DMA analysis, which was confirmed by the degree of conversion (DC), measured by FTIR spectroscopy. Additionally, some amount of sol fraction was found by 1H NMR experiments. Conclusions: The structure-property relationships developed for the system presented in this work could be useful in tissue engineering, where X-PMMA is applied. The direct measure of storage modulus values before and above glass transition may serve as a simple and fast indicator of the X-PMMA crosslink density.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2017, 19, 1; 47-53
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Different Inorganic Fillers on Mechanical Properties and Degree of Conversion of Dental Resin Composites
    Autorzy:
    Stencel, R.
    Pakieła, W.
    Barszczewska-Rybarek, I.
    Żmudzki, J.
    Kasperski, J.
    Chladek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/352485.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    resin composites
    dental materials
    filler
    mechanical properties
    degree of conversion
    Opis:
    The aim of the study was to evaluate the influence of different fillers on the chosen functional properties of experimental composites based on typical polymeric matrix, in order to understand the effect of different fillers on their properties and to develop a simple base composite for further investigations with experimental fillers, e.g. with antimicrobial properties. Previous experiments have been usually based on commercially available composites of unknown composition or compilation of monomers, without reinforcing fillers. Scanning electron microscopy was used to investigate the quality of fillers’ dispersion, which was satisfying. Results showed significant differences between materials’ diametral tensile strength (p = 0.0019), compressive strength (p < 0.0001), Vickers microhardness (p < 0.0001), flexural modules (p = 0.0018), and the degree of conversion (p < 0.0001), but flexural strength was not significantly different (p = 0.0583). Investigations indicated that no filler type had an especially positive impact on the mechanical properties, but reinforcement effect was achieved by proper compilation of silica nanofiller and variable glass fillers. Nanofiller decreased the degree of conversion.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1361-1369
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Current infectious threats associated with the development of civilization and progress in medicine - methods of prevention and education
    Autorzy:
    Kozioł-Montewska, M.
    Pańczuk, A.
    Tokarska-Rodak, M.
    Paluch-Oleś, J.
    Gładysz, I.
    Sikora, A.
    Filipek-Czerska, A.
    Kawka, E.
    Pawłowicz, E.
    Kosińska, B.
    Montewka, M.
    Skrzek, A.
    Kozioł, M.
    Gozd-Barszczewska, A.
    Barszczewski, P.
    Spisacka, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2052218.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
    Tematy:
    Lyme disease
    legionellosis
    tuberculosis
    microbiome
    antibiotic resistance
    Opis:
    The development of civilization, economic growth, urbanization, industrialization and progress in medicine bring to the society an improvement in the quality of life, but at the same time caused changes in lifestyle, environmental conditions, and changes in the natural environment. All of these led to develop civilization diseases which have critical impact and the adverse effect on our health, about what we not always realize. In the past fifty years, about 30 new pathogens appeared causing diseases such as legionellosis, Lyme disease, and increase unexpectedly tuberculosis incidence which in some regions is associated with HIV infections. Also widespread use of antibiotics caused and still causing bacterial resistance increase to most of them. With the development of medicine and surgery, parallel effects of surgical areas and infections associated with implanted cardiac devices in the majority of the life-saving ones appeared. The development of research techniques allowed for the finding of new relationships between ecosystems in the microbiome of the gastrointestinal tract with of obesity in the society. The presence of new health aspects of civilization diseases impose pressure to create new prevention methods and public education.
    Źródło:
    Health Problems of Civilization; 2014, 08, 1; 6-14
    2353-6942
    2354-0265
    Pojawia się w:
    Health Problems of Civilization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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