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Wyświetlanie 1-15 z 49
Tytuł:
Antibacterial Properties of Polyester Fibres Materials with Titanium Dioxide Deposited on Their Surface
Autorzy:
Karbownik, I.
Kowalczyk, D.
Malinowska, G.
Paruch, B.
Powiązania:
https://bibliotekanauki.pl/articles/1807589.pdf
Data publikacji:
2009-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.80.Ba
68.47.Mn
81.07.Wx
Opis:
$TiO_{2}$ particles were deposited onto the surface of polyester (PES) material. The microbiological research were carried out on two bacteria strains: Staphylococcus aureus and Klebsiella pneumoniae, which showed antibacterial properties of the PES surfaces modified with the titanium dioxide under the influence of UV radiation.
Źródło:
Acta Physica Polonica A; 2009, 116, S; S-169-S-171
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie czystości mikrobiologicznej sprzętu i rąk pracowników w zakładach przemysłu spożywczego
An investigation of microbiological cleanness of equipment and the hands of the employees of food industry
Autorzy:
Pliszka, A.
Bachryj, F.
Barlik, I.
Bechthof, J.
Borowiak, M.
Branicka, M.
Cieplinska, I.
Chwistecka, W.
Chybowska, J.
Dudzik, E.
Dziurowicz, Z.
Dziegielewska, W.
Frasunkieiwcz, B.
Freckowicz, J.
Glowacki, M.
Juchnowicz, I.
Komornicka, T.
Kowalczyk, Z.
Lichocinska, H.
Leopold, J.
Mosek, G.
Maciaszek, A.
Orlowska-Klaus, J.
Ostrowska, I.
Pniewska, C.
Pankiewicz, W.
Prost, T.
Szropinska, D.
Szmigielska, E.
Stelmach, W.
Sitkiewicz, M.
Walukiewicz, J.
Wisniewska, I.
Powiązania:
https://bibliotekanauki.pl/articles/875148.pdf
Data publikacji:
1972
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
przemysl spozywczy
zaklady przemyslowe
pracownicy
rece
czystosc mikrobiologiczna
badania sanitarne
Źródło:
Roczniki Państwowego Zakładu Higieny; 1972, 23, 4
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cardiovascular risk factors among Polish employees of uniformed services
Autorzy:
Trzeciak, Bartosz G.
Kowalczyk, Waldemar
Grymek, Szymon
Gutknecht, Piotr
Siebert, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/21375383.pdf
Data publikacji:
2023-11-27
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
police officers
uniformed services
stress at work
cardiovascular risk factors
state fire brigade
border guards
Opis:
Objectives Employees of uniformed services (EoUS) were screened for cardiovascular risk factors. Material and Methods A total of 1138 EoUS (age M±SD 49.9±6.0 years) and 263 controls (age M±SD 54.4±9.7 years) under the care of the cardiology clinic in Gdańsk, Poland, were included in the study. Medical history and blood samples were collected, and a physical examination was performed. Ten-year cardiovascular risk of death was calculated using the systematic coronary risk evaluation (SCORE) risk algorithm for high-risk countries. Results Significantly higher values of mean systolic and mean diastolic blood pressure, mean total cholesterol level and mean BMI were recorded among the EoUS compared to controls (M±SD 141.7±11.6 mm Hg vs. 135.5±11.0 mm Hg, p < 0.001; 90.1±5.9 mm Hg vs. 84.5±6.8 mm Hg, p < 0.001; 6.01±0.76 mmol vs. 5.44±0.87 mmol, p < 0.001; 29.3±4.7 vs. 29.0±4.1, p < 0.001, respectively). Smoking cigarettes was most frequently reported by the youngest group (20–39 years old) – 47.7% and it was significantly higher in the entire EoUS group compared to control group (35.5% vs. 16.7%, p = 0.001). The occurrence of observed risk factors (blood pressure ≥140/90 mm Hg, total cholesterol concentration >5 mmol, smoking,) was significantly higher among EoUS compared to controls (92.1% vs. 57.8%, p < 0.001; 89.0% vs. 66.9%, p < 0.001; 35.5% vs. 16.7%, p < 0.001, respectively). In the male group, the mean calculated ten-year risk of fatal cardiovascular events, the percentage of high calculated risk, and very high risk were higher in the EoUS group compared to controls (M±SD 4.44±3.49 vs. 4.23±3.86, p = 0.001; 23.7% vs. 20.2%, p = 0.007; 7.4% vs. 6.5%, p = 0.03, respectively). Conclusions The prevalence of all identified risk factors was found to be higher among employees of uniformed services when compared to the control group. The presence of these risk factors within the population of uniformed service employees results in a greater risk of mortality from cardiovascular diseases.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2023, 36, 5; 656-671
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative assessment of heat insulation properties of thermal resistant paints with use of infrared camera
Autorzy:
Kruczek, T.
Szczygieł, I.
Kruczek, G.
Kowalczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/114646.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thermovision infrared measurements
thermal resistant paint
Opis:
To reduce heat losses from buildings various methods are used. One of them is applying so called “thermal resistant paints”. These paints can be put in principle on the inner but also on outer surfaces of building external walls. The aforementioned paints are put on a surface in the similar way as other paints in building construction technology and form a thin insulation layer. The acting of this paints consists in causing a noticeable temperature drop within this layer and simultaneously on the wall surface. This work presents the experimental rig, measurement procedures and selected measurement results.
Źródło:
Measurement Automation Monitoring; 2017, 63, 3; 98-101
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Components of defence strategy induced in Solanum species by elicitor from Phytophthora infestans
Autorzy:
Polkowska-Kowalczyk, L.
Olszak, K.
Tarwacka, J.
Szczegielniak, J.
Muszynska, G.
Wielgat, B.
Powiązania:
https://bibliotekanauki.pl/articles/80345.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
Solanum
signal transduction
protein kinase
reactive oxygen species
mitogen-activated protein kinase
calcium-dependent protein kinase
signalling network
gene expression
signalling pathway
nitroblue tetrazolium
elicitor treatment
Phytophthora infestans
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computerized Systems for Electromagnetic Nondestructive Testing
Skomputeryzowane Systemy do Elektromagnetycznych Badań Nieniszczących
Autorzy:
Chady, T.
Gratkowski, T.
Komorowski, M.
Kowalczyk, J.
Pałka, J.
Psuj, G.
Powiązania:
https://bibliotekanauki.pl/articles/156986.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
elektromagnetyczne metody badań nieniszczących
magnetyczna tomografia indukcyjna
electromagnetic nondestructive testing methods
eddy current method
magnetic flux leakage method
Barkhausen noise
magnetic induction tomography
Opis:
In this paper computerized systems for electromagnetic nondestructive testing of well- and low-conducting materials are presented. Several different inspection methods: the eddy current method, the magnetic flux leakage, the Barkhausen noise, and the AC magnetization measurement are described. Finally, the magnetic induction tomography system for evaluation of low-conductivity materials has been presented.
W niniejszym artykule przedstawiono skomputeryzowane układy do elektromagnetycznych badań nieniszczących materiałów dobrze- i słabo-przewodzących. Opisano kilka różnych metod badawczych: metodę prądów wirowych, strumienia rozproszenia, szumów Barkhausena oraz obserwacji procesu magnesowania. Zaprezentowano układ magnetycznej tomografii indukcyjnej do oceny materiałów słabo-przewodzących.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 6, 6; 26-29
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Gravitation on Water Migration in Granular Media
Autorzy:
Milczarek, J.
Fijał-Kirejczyk, I.
Żołądek, J.
Chojnowski, M.
Kowalczyk, G.
Powiązania:
https://bibliotekanauki.pl/articles/1813182.pdf
Data publikacji:
2008-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.56.+r
68.08.De
81.70.-q
Opis:
The results of the experiments on water migration in unsaturated granular media performed with dynamic neutron radiography technique are presented. It was found that the porosity of the medium did not determine the kinetics of the process in a marked way. The influence of gravity was found to be considerable for media like coarse sand and gravel, consisting of large grains. No effect of gravitation on the water migration in clay beds was observed. The results are discussed in terms of the classical Washburn-Bosanquet theory of adhesion driven motion of the liquid in a straight circular capillary under gravity. It was found that this theory provides only qualitative description of the water migration within granular media, and the viscous dissipation effects are greatly underestimated.
Źródło:
Acta Physica Polonica A; 2008, 113, 4; 1245-1254
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Properties of CeNiAl₄ Based on ab initio Calculations and XPS Measurements
Autorzy:
Werwiński, M.
Chełkowska, G.
Szajek, A.
Kowalczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030430.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.b
74.25.Jb
Opis:
The CeNiAl₄ compound crystallizes in an orthorhombic YNiAl₄-type structure with a Cmcm space group. The earlier susceptibility data and X-ray photoelectron spectroscopy (XPS) suggested a localized character of the 4f states in CeNiAl₄ with a valence state close to a Ce⁺³ ion. In this work we present a combined theoretical and experimental study of the electronic structure for the Kondo dense system CeNiAl₄ based on the XPS data and ab initio calculations. Using the band structure calculations the theoretical XPS valence band spectra are evaluated. Below the Fermi energy the total density of states contains mainly 3d states of Ni hybridized with Ce 4f states.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 517-519
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Structure and X-Ray Photoelectron Spectra of YNi$\text{}_{4}$B Compound
Autorzy:
Pugaczowa-Michalska, M.
Chełkowska, G.
Kowalczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/2036993.pdf
Data publikacji:
2003-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Eh
82.80.Pv
71.20.-b
63.70.+h
Opis:
The electronic structure of the ternary YNi$\text{}_{4}$B compound, crystallizing in the hexagonal CeCo$\text{}_{4}$B structure (P6/ mmm space group), was studied by X-ray photoelectron spectroscopy and ab initio calculations. Core levels and the valence band were investigated. The X-ray photoelectron spectroscopy valence band is compared with that obtained from ab initio calculations. The valence band spectrum at the Fermi level exhibits the domination of the Ni(3d) states, which are hybridized with 4d states of Y and 2p states of B. The theoretical electronic specific heat coefficientγ derived from N(E$\text{}_{F}$) is about 11.33 mJ/(mol K$\text{}^{2}$) for experimental lattice parameters. The calculated bulk modulus is B$\text{}_{0}$=1.61632 Mbar.
Źródło:
Acta Physica Polonica A; 2003, 104, 5; 487-494
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elements of signalling pathways in the response of Solanum species to Phytophthora infestans
Autorzy:
Polkowska-Kowalczyk, L.
Olszak, K.
Tarwacka, J.
Szczegielniak, J.
Muszynska, G.
Wielgat, B.
Powiązania:
https://bibliotekanauki.pl/articles/80244.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
signalling pathway
Solanum species
Phytophthora infestans
reactive oxygen species
mitogen-activated protein kinase
calcium-dependent protein kinase
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Entropy Change Calculations for Pure Gd and a Ni-Mn-Cu-Ga Heusler Alloy: Constant Field vs. Constant Temperature Experiment
Autorzy:
Ferenc, J.
Kowalczyk, M.
Wróblewski, R.
Cieślak, G.
Sielicki, K.
Leonowicz, M.
Kulik, T.
Powiązania:
https://bibliotekanauki.pl/articles/1402338.pdf
Data publikacji:
2015-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Sg
65.40.gd
Opis:
The magnetocaloric effect may be assessed indirectly by expressing it as the change in magnetic entropy in varying magnetic field, H, as the function of temperature, T. Magnetization, M=f(T,H), may be experimentally acquired from a series of isothermal measurements with variable field, or from a series of constant field measurements with variable temperature. The accuracy of magnetic entropy calculation depends on the number of series in these experiments. The aim of this work is to determine how little data is sufficient to obtain accurate results of magnetic entropy change calculations, on the basis of real, magnetocaloric materials. Pure gadolinium and a Ni-Mn-Cu-Ga Heusler alloy were studied. For both materials, the magnetic entropy change and relative cooling power were calculated from both experiments, with the decreasing number of experimental data. For both materials, the constant field experiment with only 6 field values provided only a 5% error of calculations, as compared to the experiment with 100 field values. The Arrott plots were also drawn for constant field mode with 6 field values, easily indicating the order of transition. Comparison of the calculation results suggests that the constant field mode magnetization measurement may be more accurate and faster than isothermal mode.
Źródło:
Acta Physica Polonica A; 2015, 128, 1; 111-115
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From Heavy Fermion and Spin-Glass Behavior to Magnetic Order in $CeT_4M$ Compounds
Autorzy:
Toliński, T.
Kowalczyk, A.
Falkowski, M.
Synoradzki, K.
Chełkowska, G.
Hoser, A.
Rols, S.
Powiązania:
https://bibliotekanauki.pl/articles/1426703.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Lp
71.27.+a
75.30.Mb
75.30.Cr
75.50.Lk
78.70.Nx
Opis:
We report on the transitions between the ferromagnetic order, spin-glass behavior, heavy fermion and fluctuating valence state in a series of isostructural compounds $CeT_4M$ (T = Ni, Cu; M = Al, Ga, Mn). The dilution of Ce or the T and M elements allowed us to follow the physical properties evolution employing the measurements of the heat capacity, dc magnetic susceptibility, frequency dependent ac magnetic susceptibility, magnetization relaxation, inelastic neutron scattering and also the X-ray photoemission spectroscopy. It is shown that the Mn rich compounds lean towards the spin glass behavior. For the compounds governed by the close to localization Ce 4f states the effect of the crystal electric field has been studied. It has been shown that the spin glass-like behavior can significantly influence the physics of the $CeT_4M$ compounds.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1014-1018
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the Method of Separating Graphene from the Growth Substrate on the Quality of the 2D Material Obtained
Autorzy:
Dybowski, K.
Romaniak, G.
Kula, P.
Jeziorna, A.
Kowalczyk, P.
Atraszkiewicz, R.
Kołodziejczyk, Ł.
Nowak, D.
Zawadzki, P.
Kucińska, M.
Powiązania:
https://bibliotekanauki.pl/articles/351974.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene
polycrystalline graphene
electrochemical delamination
chemical etching
graphene transfer
Opis:
This article presents the research results on impact of the method of polycrystalline graphene layers separation from the growth substrate on the obtained carbon material quality. The studies were carried out on graphene sheets obtained by metallurgical method on a liquid metal substrate (HSMG® graphene). The graphene was separated using chemical etching method or the electrochemical delamination method, by separating by means of electrolysis. During electrolysis, hydrogen is emitted on a graphene-covered of cathode (metal growth substrate) as a result of the voltage applied. The graphene layer breaks away from metallic substrate by gas accumulation between them. The results from these separation processes were evaluated by means of different tools, such as SEM, TEM and AFM microscopy as well as Raman Spectroscopy. In summary, the majority of analyses indicate that the graphene obtained as a result of hydrogen delamination possesses higher purity, smaller size and number of defects, its surface is smooth and less developed after the transfer process to the target substrate.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1321-1326
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Recrystallization Annealing on the Properties and Structure of Low-Carbon Ferritic Steel IF
Autorzy:
Kowalczyk, K.
Jabłońska, M.
Rusz, S.
Junak, G.
Powiązania:
https://bibliotekanauki.pl/articles/355122.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
low-carbon IF steel
annealing
mechanical properties
microstructure
Opis:
This paper shows results of researches of a structure and mechanical properties of metal sheets of IF steels subjected to recrystallization annealing. The annealing was held in the scope of the temperature of 600-900°C over 25 min time. The impact of heat treatment on changes of properties and structure of the researches steel has been analysed. During annealing typical processes of rebuilding of the structure deformed as a result of cold deformation in the form of forming new recrystallized grains and their growth were observed. As the temperature of annealing increases the hardness of the material gradually decreases.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1957-1961
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Injection molding of transparent polymeric materials with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide forenhanced fire retardancy
Formowane wtryskowo transparentne materiały polimerowe uniepalnione 10-tlenkiem 9,10-dihydro-9-oksa-10-fosfafenantrenu
Autorzy:
Ubowska, A.
Kowalczyk, K.
Krala, G.
Powiązania:
https://bibliotekanauki.pl/articles/947097.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide
polystyrene
poly(methylmethacrylate)
mechanical properties
thermal properties
10-tlenek 9,10-dihydro-9-oksa-10-fosfafenantrenu
polistyren
poli(metakrylan metylu)
właściwości mechaniczne
właściwości termiczne
Opis:
Selected transparent polymers [i.e., polystyrene (PS) and poly(methyl methacrylate) (PMMA)] were extruded with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The obtained compositions were formed into testing samples by injection molding process. The obtained materials (containing 1–10 wt parts/100 wt parts of the polymer) exhibited higher melt flow rate and thermal resistance, as well as reduced flammability (while maintaining their mechanical properties). Additionally, Fourier transform infrared spectroscopy (FT-IR) analysis of modified polymers was conducted. Studies confirmed that – during the extrusion and/or injection molding – DOPO reacts with PS and PMMA.
Wybrane transparentne polimery termoplastyczne [tj. polistyren (PS) i poli(metakrylan metylu) (PMMA)] wytłaczano z 10-tlenkiem 9,10-dihydro-9-oksa-10-fosfafenantrenu (DOPO), a z uzyskanych kompozycji metodą wtrysku formowano próbki do badań. Otrzymane materiały (zawierające 1–10 cz. mas. DOPO/100 cz. mas. polimeru) charakteryzowały się większym wskaźnikiem szybkości płynięcia, większą odpornością termiczną oraz mniejszą zapalnością (przy zachowaniu właściwości mechanicznych) niż polimery niemodyfikowane. Dodatkowo kompozycje z DOPO oceniano metodą spektroskopii w podczerwieni z transformacją Fouriera (FT-IR). Badania potwierdziły, iż w trakcie wytłaczaniai/lub formowania wtryskowego DOPO reaguje z PS oraz PMMA.
Źródło:
Polimery; 2018, 63, 7-8; 536-541
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 49

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