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    Tytuł:
    UV-crosslinkable photoreactive self-adhesive hydrogels based on acrylics
    Autorzy:
    Czech, Z.
    Antosik, A.K.
    Bednarczyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/778227.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    self-adhesive hydrogels
    acrylics
    UV-crosslinking
    tack
    peel adhesion
    water adsorption
    Opis:
    Hydrogels are a unique class of macromolecular networks that can hold a large fraction of an aqueous solvent within their structure. They are suitable for biomedical area including controlled drug delivery and for technical applications as self-adhesive materials for bonding of wet surfaces. This paper describes photoreactive self-adhesive hydrogels based on acrylics crosslinked using UV radiation. They are prepared in ethyl acetate through radical polymerization of monomers mixture containing 2-ethylhexyl acrylate (2-EHA), butyl acrylate (BA), acrylic acid (AA) and copolymerizable photoinitiator 4-acryloyloxy benzophenone (ABP) at presence of radical starter 2.2’-azobis-diisobutyronitrile AIBN. The synthesized acrylic copolymers were determined by viscosity and GPC analysis and later modified using ethoxylated amines. 4-acryloyloxy benzophenone (ABP) was used as crosslinking monomer. After UV crosslinking the properties of these novel synthesized hydrogels, such as tack, peel adhesion, shears strength, elongation and water adsorption were also studied.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 2; 126-130
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The method for determining adhesion and cohesion of photo-curable nail polishes
    Metoda statyczno-dynamiczna oznaczania adhezji i kohezji fotoutwardzalnych lakierów do paznokci
    Autorzy:
    Ragańska, P.
    Antosik, A. K.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/270339.pdf
    Data publikacji:
    2014
    Wydawca:
    Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
    Tematy:
    adhezja
    kohezja
    fotoutwardzalne lakiery do paznokci
    keratyna
    adhesion
    cohesion
    UV curing
    nail polish
    keratin
    Opis:
    The purpose of the study was to develop a new method to investigate the adhesion and cohesion of photo-curable nail polishes. One of the main variants of static-dynamic method, in addition to receiving a meaningful way the study was later able to refer them to the behavior of the test nail polishes compo- sitions on the nail human. For this purpose, a zoonotic keratin extracted from the hooves of the horse was used as substrate. Preliminary studies have confirmed that the method can be used to determine adhesion and cohesion.
    Celem opracowania było stworzenie nowej metody pozwalającej na zbadanie adhezji oraz kohezji fotoutwardzalnych lakierów do paznokci. Jednym z głównych założeń metody statyczno-dynamicznej było zastosowanie jej do badań zachowania się kompozycji lakierowej na ludzkim paznokciu. W tym celu jako podłoże zastosowano keratynę pochodzenia odzwierzęcego pozyskaną z kopyta końskiego. Badania wstępne potwierdziły, że opracowana metoda może być stosowana do oznaczania adhezji i kohezji.
    Źródło:
    Aparatura Badawcza i Dydaktyczna; 2014, 19, 4; 293-298
    2392-1765
    Pojawia się w:
    Aparatura Badawcza i Dydaktyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Samonaprawiające się lakiery
    Self-healing varnishes
    Autorzy:
    Bednarczyk, P.
    Antosik, A. K.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/172663.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    lakier
    samonaprawiające się materiały
    powłoki
    varnish
    self-healing material
    coatings
    Opis:
    The recent decade brought about new dimensions to materials developments; stimuliresponse materials capable of responding to internal or external stimuli. The ability of materials to autonomously self-heal is the most promising property [1]. The number of publications that appeared in the past decade concerning the self-repair of polymeric materials is quite extensive. They cover different fields of research, including thermoplastic and thermoset polymers, polymer composites, and coatings. The first ideas already started to develop in the 1990s, when scientists started to look at nature to solve the recurring problem of damage to materials [2]. The process of implementing a strategy of autorepair of a damage is a subject of increasing interest. One of the challenges for many of the already developed self- -repairing systems is to enhance the structural stability and mechanical properties of the materials. The first developed self-healing materials relied on microencapsulated healing agents within the bulk polymer [3]. Upon mechanical stress, the microcapsules were ruptured releasing agents that reacted with the catalyst in the polymer matrix to repair the damage [4–5]. Among many other crosslinking methods relying mainly on epoxy chemistry, ‘click’-based chemistry, the use of thiolene-based systems, as well as catalytic crosslinking reactions based on ring opening metathesis polymerization have found wide application in materials science. In the latter methodology, the catalyst present inside the matrix then promotes an autorepair reaction via ROMP. Thermosetting autorepair polymers which have been proposed so far include Grubbs’ first-generation catalyst; currently, the possibility of applying other ruthenium catalysts such as second-generation Grubbs’ catalyst and Hoveyda–Grubbs’ second-generation catalyst are under evaluation [3]. In addition to the aforementioned methods, you can also find self-healing coatings in the reaction of Diels-Alder. The self-healing concept envisages a similar recovery of material properties, such as fracture toughness, corrosion resistance, or conductivity, to improve the durability and reliability of the polymer materials. Damage due to impact, wear or fatigue initiates a healing mechanism that preferentially without external stimulus can recover any functionality. Researchers working in the field of self-healing polymeric materials mainly focus on high-end applications where the added value outweighs the cost of production. Such applications can, for example, be found in the transport sector, electronics, and structural materials. Car coatings, structural composites in airplanes, conductive polymers in sensors are only some examples of many targeted applications. Repair of damage in these materials is often laborious, not cost-efficient and only detected on the macroscopic level when it is too late. On the other hand, self -healing materials try to avoid macroscopic failure by responding immediately or at least fast enough to damage [1].
    Źródło:
    Wiadomości Chemiczne; 2017, 71, 5-6; 381-388
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On a topology of convergence
    Autorzy:
    Antosik, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/722933.pdf
    Data publikacji:
    1970
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Źródło:
    Colloquium Mathematicum; 1970, 21, 2; 205-209
    0010-1354
    Pojawia się w:
    Colloquium Mathematicum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Montmorillonite as the catalyst in oxidation of limonene with hydrogen peroxide and in isomerization of limonene
    Autorzy:
    Malko, M.
    Antosik, A. K.
    Wróblewska, A.
    Czech, Z.
    Wilpiszewska, K.
    Miądlicki, P.
    Michalkiewicz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/779496.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    montmorillonite
    R-(+)-limonene
    oxidation
    isomerization
    hydrogen peroxide
    heterogeneous catalysis
    Opis:
    In our studies montmorillonite (MMT) was used as the heterogeneous, natural catalyst. This material was previously prepared by bentonite purification with help of the sedimentation method. The obtained catalyst was characterized by: XRD, SEM, BET and EDX. Catalytic tests with montmorillonite as the catalyst were performed with the natural terpene – R-(+)-limonene. This compound was oxidized with hydrogen peroxide and, moreover, in the separate process it was also isomerized. As the main products of limonene oxidation were detected: (1,2-8,9)-diepoxide, perillyl alcohol, carvone, carveol, 1,2-epoxylimonene and 1,2-epoxylimonene diol. In the isomerization of R-(+)-limonene were formed: terpinenes, terpinolene and p-cymene. Conversions of limonene in these processes reached 70–80%. The application of montmorillonite (the natural of origin) in the studied processes (oxidation and isomerization) is environmentally friendly, it allows to reduce the cost of the studied processes. The resulting products of the processes of oxidation and isomerization of R-(+)-limonene have many applications.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 4; 50-58
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Jednostronnie klejące taśmy na bazie samoprzylepnych klejów silikonowych – dobór najlepszej kompozycji
    One side self-adhesives tapes based on silicone pressure-sensitive adhesives – selections of the best compositions
    Autorzy:
    Antosik, A. K.
    Bednarczyk, P.
    Czech, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/141950.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
    Tematy:
    taśmy samoprzylepne
    silikony
    kleje samoprzylepne
    self-adhesives tape
    silicone
    pressure-sensitive adhesives
    Opis:
    Silikonowe kleje samoprzylepne składają się zazwyczaj z dużych segmentów silano-funkcyjnych polimerów silikonowych oraz żywic silikonowych (MQ). Powszechnie wiadomo, że silikonowe kleje samoprzylepne, ze względu na swoje unikalne właściwości, są produktami specjalnego zastosowania. Kombinacja właściwości silikonów, takich jak wysoka elastyczność połączeń Si–O–Si, niewielkie oddziaływanie międzycząsteczkowe, niskie napięcie powierzchniowe, doskonała stabilność termiczna oraz transparentność dla promieniowania UV, doskonałe właściwości elektryczne, duża odporność chemiczna oraz odporność na warunki atmosferyczne sprawia, że kleje silikonowe posiadają lepsze właściwości w porównaniu do innych typowych polimerowych klejów organicznych. W pracy przedstawiono dobór najlepszych kompozycji klejów silikonowych do otrzymywania jednostronnie klejących taśm samoprzylepnych.
    Silicone pressure-sensitive adhesives are usually comprised of high-molecular-weight silanol-functional silicone polymers and siloxane resins (MQ). It is well known that silicone adhesives are products of special use. Combination of the unique properties of silicones, such as high Si–O–Si backbone flexibility, low intermolecular interactions, low surface tension, excellent thermal stability and high UV transparency, often explains why silicone PSAs have superior performance at high- and low-temperature extremes, excellent electrical properties, chemical resistance and outstanding weathering resistance it makes they are superior compared to organic PSAs. The paper presents a selection of the best compositions of silicone adhesives for one-side pressure sensitive adhesive tapes.
    Źródło:
    Chemik; 2015, 69, 12; 862-867
    0009-2886
    Pojawia się w:
    Chemik
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differential expression of epidermal growth factor and transforming growth factor beta isoforms in dog endometrium during different periods of the estrus cycle
    Autorzy:
    Bukowska, D.
    Kempisty, B.
    Jackowska, M.
    Wozna, M.
    Antosik, P.
    Piotrowska, H.
    Jaskowski, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/30107.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    expression
    epidermal growth factor
    transforming growth factor-beta
    isoform
    dog
    endometrium
    different period
    oestrous cycle
    Opis:
    Both epidermal growth factor (EGF) and transforming growth factor (TGF) play an important physiological role in the processes of proliferation and differentiation of several different cell types. However, the expression profiles of these factors in domestic bitches endometrium are still poorly recognized. The aim of the present study was to identify and analyze the differential expression of these factors in various stages of the estrus cycle. Endometrial tissue from proestrus (n=17), estrus (n=10), day 10 diestrus (n=15), day 35 diestrus (n=18) and anestrus (n=25) was collected soon after ovariohysterectomy. Total RNA was isolated from the endometrium by means of Chomczyński and Sacchi method, treated by DNase I, and reverse- transcribed into cDNA. Quantitative analysis of EGF, TGFβ1, TGFβ2, and TGFβ3 cDNA was performed by real-time quantitative polymerase chain reaction (RT-PCR). EGF expression in canine endometrium was increased in the estrus stage as compared to proestrus (P<0.05), day 10 diestrus (P<0.05), day 35 diestrus (P<0.01) and anestrus (P<0.001). We also found the differences in EGF expression between day 10 and day 35 of estrus as well as between day 35 of estrus with anestrus (P<0.05, P<0.01, respectively). The TGFf1 transcript contents were also higher in estrus as compared to other stages (P<0.01). The TGFβ2 and TGFβ3 in the estrus stage was increased compared to proestrus, day 10 diestrus, day 35 diestrus and anestrus (P<0.05). We proved that expression of EGF and TGFβ transcript isoforms is related to the phase of estrus in bitches and therefore may be regulated by specific hormone concentrations during these periods. Our results confirm the hypothesis that these growth factors play a role in the regulation of biochemical changes in the endometrial tissues during the estrus cycle.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diacryloyl Derivative of Mannitol - Synthesis and Application in Gelcasting of Al2O3-ZrO2 Composites
    Autorzy:
    Wiecinska, P.
    Kubica, D.
    Pietrzak, E.
    Sakowicz, A.
    Prokurat, N.
    Antosik, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/356943.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gelcasting
    ZTA
    composites
    zirconia
    mannitol
    Opis:
    The aim of research was the elaboration of the synthesis of new organic monomer applicable in gelcasting. The substance named 3,4-di-acryloyl-D-mannitol which contains two acryloyl groups and four hydroxyl groups in its molecule has been synthesized. The monomer has been then applied in the preparation of Al2O3-ZrO2 composites by gelcasting and subsequent sintering. Rheological properties of ceramic suspensions have been examined, as well as the properties of green and sintered bodies. SEM observations allowed to determine the distribution of zirconia grains in alumina matrix. Density, Vickers hardness and fracture toughness of ZTA composites have been measured. The new monomer, that is diacryloyl derivative of mannitol, is less sensitive to the oxygen inhibition than commonly used in gelcasting and commercially available 2-hydroxyethyl acrylate.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 859-865
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Częstość występowania mutacji c.1473+1G>A w genie ADAMTS17 u psów ras predysponowanych do wystąpienia pierwotnego zwichnięcia soczewki w polskich hodowlach
    The incidence of c.1473+1G>A mutation in the ADAMTS17 gene in canine breeds predisposed for primary lens luxation (PLL) in Polish kennel
    Autorzy:
    Lisiak-Teodorczyk, K.
    Mackowski, M.
    Cholewinski, G.
    Wojciechowicz, J.
    Antosik, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/860588.pdf
    Data publikacji:
    2018
    Wydawca:
    Krajowa Izba Lekarsko-Weterynaryjna
    Tematy:
    Polska
    psy rasowe
    hodowla zwierzat
    choroby oczu
    choroby dziedziczne
    genetyka zwierzat
    pierwotne zwichniecie soczewki
    gen ADAMTS17
    mutacja c.1473+1G>A
    wystepowanie
    czestotliwosc wystepowania
    Źródło:
    Życie Weterynaryjne; 2018, 93, 09
    0137-6810
    Pojawia się w:
    Życie Weterynaryjne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of integrins and vascular endothelial growth factor isoforms mRNA expression in the canine uterus during perimplantation period
    Autorzy:
    Bukowska, D.
    Kempisty, B.
    Jackowska, M.
    Wozna, M.
    Antosik, P.
    Piotrowska, H.
    Jaskowski, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31799.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    integrin
    vascular endothelial growth factor
    isoform
    mRNA expression
    dog
    uterus
    pregnancy
    bitch
    Opis:
    Integrins are the major receptors within the extracellular matrix (ECM) that mediate several functions connected with cell life and metabolism, such as cell adhesion, migration, cytoskeletal organization, proliferation, survival, and differentiation. A vascular endothelial growth factor (VEGF) is one of the most important angiogenic factors. It has been suggested that the expression of this gene may play crucial physiological roles in reproductive organs. All investigated endometrial tissues were isolated on day 10-12 after mating. Control bitches, used in this study, were in metestrus, which was determined according to the vaginal cytology and progesterone level in blood. Early pregnancy was verified by flushing the uterine horns with PBS. Total RNA was isolated from the bitches endometrium by means of the Chomczyński and Sacchi method, treated by DNase I, and reverse-transcribed into cDNA. A quantitative analysis of integrins α2b, β2 and β3, VEGF 164, 182 and 188 cDNA was performed by RT-PCR. In results we have shown an increased expression of all investigated genes (integrins α2b, β2 and β3, VEGF 164, 182, and 188) in pregnant bitches uterus as compared to non-pregnant females (P<0.001). Our results indicated that the expression of genes encoding integrins and vascular endothelial growth factors is different in relation to the time of the embryo implantation and it is increased in the first period of this process. This may be associated with the induction of specific mechanisms responsible for receptivity of uterus following the embryo attachment. In addition, all of investigated genes are up-regulated in a pregnancy-specific manner and the increased expression of these genes may regulate the uterus function during the implantation of canine embryos.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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