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Wyświetlanie 1-15 z 18
Tytuł:
Parents’ opinions of children and teenagers’ vaccination in Lower Silesia.
Autorzy:
Furman-Bednarczyk, A.
Pietras, J.
Powiązania:
https://bibliotekanauki.pl/articles/1775.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Opis:
Background: Immunization in Poland might be seriously threatened because of inaccurate information about its safety and effectiveness. It is necessary to monitor people’s opinions about immunization in order to stop the negative process of disinformation. Aim of the study: The aim of the diploma paper was to understand parents’ attitude and concerns about immunization in Poland. Material and methods: Two hundred parents from Lower Silesia were enrolled in the study in 2016. The research tool was the author’s unnamed questionnaire. Results: The research shows that the majority of parents 92.5% (183) have positive attitudes towards immunization. The obligatory immunization rate among children in Poland was very high 96% (191). 70.4% (138) of children were given at least one vaccination that was not obligatory in Poland and in most cases that was vaccination against pneumococcus – 61% (103) of children and chickenpox – 54.4% (92) of children. A relationship was noted between the recommended vaccination and financial situation of parents and their education level. There were several reasons why people’s attitudes to vaccination might be negative: financial reasons 60.3% (41), vaccine injury 27.19% (19), ineffectiveness 7.4% (5), and natural ways of supporting immunity 20.6% (14). More than half of respondents 51.6% (101) claim that their knowledge about the immunization is insufficient. The main source of information about immunization for parents is medical staff (doctors, nurses and midwifes). Nevertheless, 32.8% (65) of respondents reported not receiving any information about recommended vaccination from their attending physician. Conclusions: The uptake of immunization is related on parents’ education and financial reasons. Medical staff do not inform parents and promote immunization adequately. Parents are not informed about the possibility of extended vaccination. It is necessary to educate parents about the safety and effectiveness of immunization.
Źródło:
Medical Science Pulse; 2018, 12, 3
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Entamoeba gingivalis - prevalence and correlation with dental caries in children from rural and urban regions of Lublin province, Eastern Poland
Autorzy:
Mielnik-Błaszczak, M.
Rzymowska, J.
Michałowski, A.
Skawińska-Bednarczyk, A.
Błaszczak, J.
Powiązania:
https://bibliotekanauki.pl/articles/2081940.pdf
Data publikacji:
2018
Wydawca:
Instytut Medycyny Wsi
Tematy:
children
dental caries
Entamoeba gingivalis
Opis:
Introduction. Entamoeba gingivalis, as the name implies. typically lives around the gumline of the teeth in the tartar and gingival pockets of the oral cavity. Pathogenicity of protozoa in the oral cavity is not completely understood. The occurrence in patients with a good state of the immune system usually does not cause any pathological changes. In the presentede survey, an increased incidence of Entamoeba gingivalis in conjunction with pathological changes in the oral cavity was found. Objectives. The aim of the study was to evaluate the prevalence of Entamoeba gingivalis in children treated in Department of Paediatric Dentistry of the Medical University in Lublin and its correlation with dental caries. Materials and method. Diagnostic materials in the form of swabs were obtained from 154 children in the age 2–18 years old, treated in the Department of Paediatric Dentistry of the Medical University in Lublin. The main index for epidemiological surveys in oral health – DMFT (decayed, missed, and filled teeth) for permanent teeth and DMFT for deciduous teeth was calculated. Results. The average number of Entamoeba gingivalis in urban children was 12.84. The DMFT number in the deciduous teeth was lower in urban patients (5.0) than from rural patients (5.4). The DMFT number in the permanent teeth was lower in urban patients (3.155) than rural patients (3.98). There was no statistically significant correlation between the DMFT value and the number of Entamoeba gingivalis. Conclusions. 1) Entamoeba gingivalis occurs in the oral cavity of children. 2) In the presented survey, both DMFT and dmft indexes were high which proves high activity of dental carious. 3) There was no significant statistical correlation observed between dental caries and the presence of Entamoeba gingivalis.
Źródło:
Annals of Agricultural and Environmental Medicine; 2018, 25, 4; 656-658
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Brain-derived neurotrophic factor in gastroenterology oncology - short review of current literature
Autorzy:
Guzel, T.A.
Mech, K.
Wroński, M.
Gerkowicz, K.
Bednarczyk, A.
Adamczyk, W.
Radecka, M.
Słodkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/28762754.pdf
Data publikacji:
2021
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2021, 28, 3; 367-371
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of heat transfer in a supersonic rocket head
Analiza wymiany ciepła w głowicy rakiety naddźwiękowej
Autorzy:
Rosłowicz, A.
Bednarczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/213478.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
rocket technology
computational fluid mechanics
unsteady heat transfer
ANSYS software
technika rakietowa
numeryczna mechanika płynów
nieustalona wymiana ciepła
oprogramowanie ANSYS
Opis:
Design of supersonic HI rocket by the Rocketry Group of Students' Space Association (SR SKA) requires an analysis of thermal phenomena occurring in the elements particularly exposed to the high temperature gas. This paper contains a description of the methodology and the results of numerical simulation of heat transfer in the elements of the rocket head. The starting points were the flight conditions (3 characteristic points defined by altitude and Mach number) and independently calculated adiabatic temperature field of the gas. ANSYS Fluent code was used to determine the temperature field on the surface of the rocket. Computed cases were viscous and inviscid flow (for comparison). Based on the results formulated for the viscous case heat transfer boundary conditions, the numerical model and the thermophysical properties of materials were defined. The model was limited to a brass top part of the head and a part of a composite dome. Analytical and empirical method of "intermediate enthalpy" determined distribution of the heat transfer coefficient on the rocket surface. Then the transient heat transfer was calculated with the ANSYS system. It included the range from the rocket launch, moment of maximum Mach number to sufficient structure cooling. The results of the analyses were conclusions relevant to the further development work. Excessive heating of composite structures during the flight has been shown.
Niniejszy artykuł zawiera opis metody oraz wyniki numerycznej symulacji wymiany ciepła w elementach głowicy rakiety. Punkt wyjścia stanowiły założone warunki lotu (3 punkty charakterystyczne określone przez wysokość i liczbę Macha) i wyznaczone niezależnie adiabatyczne pole temperatury gazu. Do wyznaczenia pola temperatur na powierzchni rakiety użyty został system ANSYS Fluent. Zostały' obliczone przypadki przepływał lepkiego i nielepkiego (dla porównania). Na podstawie wyników* dla przypadku lepkiego sformułowano warunki brzegowe wymiany ciepła, założenia modelu numerycznego. Model ograniczono do mosiężnej części noskowej i fragmentu kompozytowej kopułki. Metodą analityczno-empiryczną „średniej entalpii" (intermediate enthalpy) wyznaczono rozkład współczynnika przejmowania ciepła na powierzchni rakiety. Następnie dokonano obliczenia nieustalonej wymiany ciepła z wykorzystaniem systemu ANSYS. Obejmowały one zakres od startu rakiety, poprzez moment osiągnięcia maksymalnej liczby Macha, do wystarczającego schłodzenia konstrukcji. Efektem pracy było sformułowanie wniosków istotnych z punktu widzenia dalszych prac konstrukcyjnych, wykazano nadmierne ogrzewanie elementów kompozytowych w trakcie lotu.
Źródło:
Prace Instytutu Lotnictwa; 2017, 1 (246); 79-94
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Plastic Deformation Process on the Structure and Properties of Alloy WE43
Autorzy:
Bednarczyk, I.
Mrugała, A.
Tomaszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/356215.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
alloy WE43
microstructure
tensile test
fractographic analysis of fractures
Opis:
The paper describes the results of structure and properties tests of flat bars made of alloy WE43 obtained in the process of extrusion with the use of KOBO method. An analysis of structure changes was conducted both in initial state and after plastic deformation. A quantitative analysis of the material was also conducted with the use of METILO program. The paper also presents results of mechanical tests marked in the uniaxial tensile testing in room temperature and in elevated temperature for achieved flat bars. Fractographic tests were conducted after tensile test in order to determine the mechanism of cracking.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 389-392
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Extrusion Process on the Microstructure and Mechanical Properties of Magnesium Alloys
Autorzy:
Bednarczyk, I.
Kuc, D.
Tomaszewska, A.
Mrugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/958196.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium alloys
microstructure
mechanical properties
process of extrusion method KOBO
Opis:
The article presents the results of plastic shaping tests of AZ61 and WE43 alloys. There were both classic extrusion tests as well as extrusion tests of KOBO method. An assessment was made of the influence of extrusion process parameters on the mechanical properties and the structure of the alloys. On the basis of achieved results of mechanical properties for alloys AZ31 and WE43 the susceptibility of those alloys to plastic shaping was determined. Quantitative tests of structure assessment in case of alloys AZ61 and WE43 after extrusion with the use of KOBO method were conducted with the use of METILO program. It has been shown that extrusion AZ61,WE43 alloys method KOBO leads to considerable fragmentation of grains.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2A; 545-550
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Structure of the automatic protection of a 2-tank symmetric phase shifting transformer
Struktura automatyki zabezpieczeniowej 2-kadziowego symetrycznego przesuwnika fazowego
Autorzy:
Bednarczyk, T.
Halinka, A.
Rzepka, P. A.
Szablicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/396889.pdf
Data publikacji:
2017
Wydawca:
ENERGA
Tematy:
phase shifting transformer
automatic protection
transformer
disturbance
przesuwnik fazowy
automatyka zabezpieczeniowa
transformator
zakłócenia
Opis:
Phase shifting transformers (PST) are new elements in the Polish power system. Their main task is to enable the transmission system operator to control the active power flows at the cross-border connection between the Polish and the German power systems. The paper presents the design characteristics of a 2-tank, 3-phase, symmetric phase shifting transformer (including key structural aspects) and the idea of its operation. A description of the structure of the automatic protection applied to this phase shifting transformer is included, with consideration of the measuring transducer locations and the protection criteria employed in the protection from the effects of high current short circuits.
Przesuwniki fazowe są nowym elementem polskiego systemu elektroenergetycznego. Ich podstawowym zadaniem jest umożliwienie operatorowi systemu przesyłowego sterowania przepływami mocy czynnej na połączeniu transgranicznym polskiego i niemieckiego systemu elektroenergetycznego. W artykule przedstawiono charakterystykę budowy 2-kadziowego, 3-fazowego, symetrycznego przesuwnika fazowego (z uwzględnieniem kluczowych aspektów konstrukcyjnych) oraz ideę jego działania. Zamieszczono opis struktury elektroenergetycznej automatyki zabezpieczeniowej stosowanej dla takiego przesuwnika fazowego, uwzględniając umiejscowienie przetworników pomiarowych oraz kryteria zabezpieczeniowe wykorzystywane w zabezpieczeniach służących do jego ochrony przed skutkami zwarć wielkoprądowych.
Źródło:
Acta Energetica; 2017, 3; 4-13
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Extrusion in the Complex Strain State on the Microstructure and Mechanical Properties of MgAlZn Magnesium Alloys
Autorzy:
Bednarczyk, I.
Kuc, D.
Tomaszewska, A.
Tkocz, M.
Powiązania:
https://bibliotekanauki.pl/articles/353998.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium alloys
KoBo method
microstructure
electron microscope
shape factor
Opis:
The paper presents the results of tests concerning the effect of the extrusion process in the complex strain state on the microstructure and properties of one of magnesium alloy with aluminium, zinc and manganese, designated AZ61. Due to its specific gravity, it is increasingly being used in the automotive and aerospace industries to reduce the weight of structural elements. As a result of plastic deformation processes, rods with a diameter of 8, 6 and 4 mm were obtained from AZ61 magnesium alloy. The microstructure analysis was performed using light and electron microscopy (STEM) techniques in the initial state and afterplastic deformation. Microstructure studies were supplemented with a quantitative analysis using the Metilo program. A number of stereological parameters were determined: average diameter of grain, shape factor. A static tensile test was carried out at 250ºC and 300ºC, at deformation rates of 0.01, 0.001 and 0.0001 m·s-1. Better plastic properties after deformation using KoBo methodwere obtained than with conventional extrusion.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 3; 1121-1128
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Deformation Method on the Microstructure and Properties of Magnesium Alloy WE43
Autorzy:
Bednarczyk, I.
Kuc, D.
Tkocz, M.
Tomaszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/353617.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnesium alloys
SPD method
microstructure
static tensile test
Opis:
The article presents tests results of the influence of deformation methods on the microstructure and properties of alloy WE43. There were direct extrusion tests and extrusion with KoBo method performed. An assessment of the influence of the methods of deformation on the microstructure and the mechanical properties of the achieved rods from alloy WE43 was conducted. There was an analysis of microstructure carried out with the use of light and scanning microscopy techniques in the initial state and after plastic deformation. Static tensile test was conducted in temperature of 350°C at a speed of 0.0001 m·s-1 and microhardness measurements were performed of HV0.2. On the basis of the achieved mechanical tests results it was stated that in the temperature of 350°C for samples deformed with the use of KoBo method there was an effect of superplastic flow found. The value of elongation achieved was 250% which was 3 times higher than in case of classic extrusion (80%).
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1975-1980
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformation microstructures in metallic materials after severe plastic deformation by rolling with cyclic movement of rolls
Autorzy:
Urbańczyk-Gucwa, A.
Bednarczyk, I.
Jabłońska, M.
Rodak, K.
Powiązania:
https://bibliotekanauki.pl/articles/1075888.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.F-
61.72.Ff
81.05.Bx
81.40.Rs
83.50.-v
Opis:
The results of the microstructure investigations of the pure Al and AlMg5 alloy and pure Cu and CuFe2 alloy after the application of severe plastic deformation implemented by rolling with the cyclic movement of the rolls are presented in this paper. The rolling with the cyclic movement of the rolls was carried out at values: the rolling rate v=1 rpm, the frequency of rolls movement f=1 Hz, the amplitude of rolls movement A=1.6 mm. Maximal values of rolling reduction at 6 passes was ε_{h}=80%. The structure of the these materials was analyzed using scanning transmission electron microscope. The quantitative studies of the substructure was performed with MET-ILO software, on the basis of images acquired on scanning transmission electron microscope. Performed substructure investigations showed that using the rolling with the cyclic movement of the rolls method can refine the microstructure of these materials to the ultrafine scale.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 975-978
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of dislocation substructures in high-Mn steels after dynamic deformation tests
Autorzy:
Śmiglewicz, A.
Moćko, W.
Rodak, K.
Bednarczyk, I.
Jabłońska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1058094.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
81.40.-z
68.37.Ma
46.70.-p
Opis:
The article presents the dynamic mechanical properties of two types of high manganese austenitic TWIP steels. The investigations were carried out for the wide range of strain rates from 10¯² s¯¹ up to 4×10³ s¯¹ using servo-hydraulic testing machine and split Hopkinson bar for the quasi-static and dynamic loading regime, respectively. The mechanical properties at different strain rates like yield strength and true stress were calculated out on the base of the results of impact tests. In the next step, the microstructure of the analyzed steels after different deformation rates were observed by scanning transmission electron microscopy technique in order to disclose a dislocation structures and mainly the TWIP effect. In the studies observed that with the strain rate increasing yield strength as well as true stress for 0.3 true strain increasing in both steels. The microstructure observations reveal the influence of strain rate on the structure evolution for analyzed steels.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 942-945
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dioxins - their influence on human health and the contamination of products of animal origin
Dioksyny - ich wpływ na zdrowie człowieka i skażenie produktów pochodzenia zwierzęcego
Autorzy:
Rozewicz, M.
Bombik, E.
Janocha, A.
Lagowska, K.
Bednarczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/82432.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Źródło:
Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica; 2016, 39, 3(328)
2081-1284
Pojawia się w:
Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation, properties and potential applications of a photocurable varnish with pleasant limonene smell
Autorzy:
Bednarczyk, P.
Wróblewska, A.
Czech, Z.
Malko, M.W.
Rozwadowski, Z.
Markowska-Szczupak, A.
Powiązania:
https://bibliotekanauki.pl/articles/778106.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
varnishes with limonene
smelling varnishes
urethane acrylate
UV-curing coating
Opis:
Photocurable materials which are obtained on the basis of urethane acrylate resins are often used in the industry for the production varnishes or protective coatings. The main disadvantage which is connected with the utilization of these varnishes is their unpleasant smell during the process of production and curing. This work presents the photocurable varnish which was obtained on the basis of aliphatic urethane acrylate and R-(+)-limonene. The utilization of this raw materials allows to obtain the smelling coatings. The aim of this work were the studies on the influence of limonene molecules on the mechanical properties of the UV-cured coatings. These studies showed that the coatings with limonene molecules retain their properties, and are characterized by the very good adhesion, cohesion and high gloss. These kinds of varnishes can be applied for preparation of appropriate protective coatings on the surface of wood, metals, and nail plates. These protective coatings have not only pleasure smell but also can have the bactericidal and fungicidal properties. The studies performed with Escherichia coli ATCC29425 and Candida albicans confirmed these properties.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 2; 13-19
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of table eggs-producing organic farms in Lublin voivodeship
Charakterystyka gospodarstw ekologicznych zajmujacych się produkcją jaj konsumpcyjnych na terenie województwa lubelskiego
Autorzy:
Bombik, E.
Lagowska, K.
Bednarczyk-Szurmak, M.
Rozewicz, M.
Janocha, A.
Powiązania:
https://bibliotekanauki.pl/articles/44950.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2015, 14, 2
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
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