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Wyświetlanie 1-15 z 32
Tytuł:
Titanium anodization in ethylene glycol-based electrolytes for surface structurization
Autorzy:
Jastrzębska, A.
Jakubowski, W.
Walkowiak, B.
Powiązania:
https://bibliotekanauki.pl/articles/285166.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
electrolytes
anodization
titanium
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 83
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A review of mechanical properties of diamond-like carbon coatings with various dopants as candidates for biomedical applications
Autorzy:
Jastrzębski, K.
Jastrzębska, A.
Bociąga, A.
Powiązania:
https://bibliotekanauki.pl/articles/105981.pdf
Data publikacji:
2017
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
diamond-like carbon
doping
mechanical properties
thin films
biomaterials
warstwy diamentopodobne
właściwości mechaniczne
cienkie warstwy
biomateriały
Opis:
In the modern world, there is an increasing demand for implants, and technologies connected with their manufacturing. One of the possible paths of their development relates to the use of diamond-like carbon coatings (DLC) for the improvement of surface properties of the biomaterials used for implants. Further improvement of the mentioned properties can be induced by means of doping of the coating. Among the elements which are under current investigation of researchers, the following can be placed: Ag, Si, F, Cu, Ti, Ca and P. This paper reviews previously published experimental data concerning mechanical and physicochemical properties of DLC coatings doped with Ag, Si, Cu, Ti, Ca, F and P as candidates for biomedical applications. Although plenty of articles are published in the mentioned field, the differences of coatings’ synthesis techniques, various sources of dopants and substrates, as well as conducted experiments make no consistent view about a possible solution for their future implementation in medicine. Some of the selected dopants (Cu, Ca, P), still require better characterisation of mechanical properties. There is a necessity to conduct studies of mechanical and physicochemical properties of DLC coatings doped with these elements. This will enable adjustment of the necessary technological parameters to biomedical requirements.
Źródło:
Acta Innovations; 2017, 22; 40-57
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Can titanium anodization lead to the formation of antimicrobial surfaces?
Autorzy:
Jastrzębska, A.
Jastrzębski, K.
Jakubowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/105680.pdf
Data publikacji:
2018
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
Ti6Al4V
anodic oxidation
antimicrobial properties
utlenianie anodowe
właściwości antybakteryjne
Opis:
In recent years, there has been observed a growing need for novel, multifunctional materials that would not only replace, but also heal the damaged tissues. In this paper, the titanium dioxide films manufactured by anodic oxidation method are investigated. The study of their structurization and antimicrobial properties of the coatings is presented. Samples anodized in water solutions of ethylene glycol exhibited various character -from structurized to porous ones. As the study revealed, all samples acted anti-adhesive in terms of bacterial (Escherichia coli) and fungal (Candida albicans) surface colonisation.
Źródło:
Acta Innovations; 2018, 26; 21-27
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anodized TiO2 coatings resistant to microbial colonization
Autorzy:
Jastrzębska, A.
Jakubowski, W.
Walkowiak, B.
Powiązania:
https://bibliotekanauki.pl/articles/284256.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomedical engineering
biomaterials
microbial colonisation
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 82
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Candida albicans adhesion on AlSl-316L and Ti6Al4V in changing environmental conditions
Autorzy:
Jastrzębska, A.
Jakubowski, W.
Jastrzębski, K.
Walkowiak, B.
Powiązania:
https://bibliotekanauki.pl/articles/286042.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biofilm
Candida albicans
glucose level
culture conditions
biomaterials
Opis:
Currently, studies on the formation of microbiological biofilm on biomaterial surfaces and medical devices have become an important aspect in medicine. In vivo studies of the biofilm development show a high correlation between the environmental factors and attachment of microorganisms to artificial surfaces. This paper is devoted to determining the impact of specific environmental stimuli and parameters of cultivation of Candida albicans yeasts on their adhesion to AISI-316L and Ti6Al4V substrates. Environmental parameters include variable glucose concentrations in YPG growth medium (0, 2, 4 and 10% wt.). Development of yeasts was also analyzed in terms of variable nutrients level i.e. transferring samples from medium with low nutrients level to other with higher glucose content. Another studied parameter was incubation time and how much fungal colonization varies during 24 and 48 h of incubation. For all samples, the number of both live and dead cells was taken into account. The results showed that with the increase in sugar content in culture media, biofilm development was observed, especially on AISI 316L surface. Also, significant changes in the number of adhered cells were observed with higher glucose concentration in medium after 24 h of incubation. Almost similar number of attached cells was observed for low glucose concentrations on both studied materials.
Źródło:
Engineering of Biomaterials; 2017, 20, 141; 2-7
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of corrosion resistance of magnetron sputtered doped DLC coatings with use of salt spray technique
Autorzy:
Jastrzębski, K.
Paradowska, J.
Jastrzębska, A.
Bociąga, D.
Powiązania:
https://bibliotekanauki.pl/articles/286076.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
implants
corrosion
DLC coatings
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 104
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic approach and balancing of aerobic stabilization of solid wastes in lysimeters
Autorzy:
Krzystek, L.
Ślęzak, R.
Zieleniewska-Jastrzębska, A.
Ledakowicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/778671.pdf
Data publikacji:
2008
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
składowisko odpadów
aerobowa stabilizacja odpadów
lizymetr
odciek wysypiskowy
landfills
aerobic solid waste stabilization
lysimeters
leachates
elemental balances
Opis:
Forced aeration of old landfills by an in situ method causes enhanced reduction of leachate indices organic load, a decrease of greenhouse gases emitted to the atmosphere and waste stabilization. The aim of the research was an experimental simulation of aerobic stabilization on landfills carried out under different conditions of leachate recirculation in lysimeters. The results were used in balancing and the kinetic analysis of the organic substance degradation.
Źródło:
Polish Journal of Chemical Technology; 2008, 10, 1; 11-14
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bactericidal TiO2 layers doped with Cu, Zn, and ZnO
Autorzy:
Jakubowski, W.
Frankowski, P.
Jastrzębska, A.
Celigowska, A.
Frąckiewicz, P.
Walkowiak, B.
Powiązania:
https://bibliotekanauki.pl/articles/284240.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
chemical antimicrobial substances
bacterial biofilms
antibiotics
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 30
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure of chitosan-based, ZnO-doped antibacterial composite
Autorzy:
Ciołek, L.
Biernat, M.
Jaegermann, Z.
Zaczyńska, E.
Czarny, A.
Jastrzębska, A.
Olszyna, A.
Powiązania:
https://bibliotekanauki.pl/articles/284490.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
composites
regenerative medicine
bone tissue engineering
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 18
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic analysis of stationary and spatially optimized photovoltaic systems for Polish climatic conditions
Autorzy:
Bugała, A.
Frydrychowicz-Jastrzębska, G.
Powiązania:
https://bibliotekanauki.pl/articles/97238.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
tracking system
economic balance
photovoltaics
payback time
Opis:
The paper presents the economic aspect of use two - axis Sun tracking systems compared with stationary units in photovoltaics on the basis of own annual measurements of electrical energy for local urban conditions. The results were scaled to maximum power of 10 kWp. Electricity consumption by positioning system and maintenance costs were included and estimated payback period of investment for different variants of settlement of produced energy, taking into account own financing, banking and preferential subsidies under the Prosumer program from the National Fund for Environmental Protection and Water Management, was calculated.
Źródło:
Computer Applications in Electrical Engineering; 2014, 12; 452-461
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sun tracking in PV systems aspects
Autorzy:
Frydrychowicz-Jastrzębska, G.
Bugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/97242.pdf
Data publikacji:
2012
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
photovoltaic system
PV system
sun tracking
Źródło:
Computer Applications in Electrical Engineering; 2012, 10; 333-346
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CIS, CIGS and CIBS thin film solar cells and possibilities of their application in BIPV
Autorzy:
Frydrychowicz-Jastrzębska, G.
Bugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/97250.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
solar cell
CIS
heterojunction
Light Soaking effect
BIPV
Opis:
Photovoltaic thin–film solar cells have gained more and more popularity in recent years. As well as high efficiency, they have a number of properties allowing their application in BIPV. The paper presents thin film copper indium diselenide cells (CuInSe2 – CIS) and their modifications. Their electric and optical properties are characterised. The subject of presentation includes phenomena, which take place in these solutions as well as issues related to selection of absorbing–generating layers and a window layer, including the possibilities of solving these issues to obtain high efficiency of photovoltaic conversion. At present, the photovoltaic conversion is already at the level of 22.3% in laboratory conditions [29]. The examples of roof and facade applications of CIS with regards to buildings are provided.
Źródło:
Computer Applications in Electrical Engineering; 2016, 14; 364-377
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selected solutions in photovoltaic systems increasing their efficiency
Autorzy:
Frydrychowicz-Jastrzębska, G.
Bugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/97495.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
solar cell
concentrator
PV module
power gain
Opis:
The basic objective in photovoltaics is obtaining electrical energy with the costs comparable to the costs of energy obtained from conventional fuels. The effectiveness of acquisition of electrical energy from solar cells can be improved, among other things, by using solar radiation concentrators. Photovoltaic systems with low concentration (LCPV) and high concentration (HCPV) were characterised [13]. The possibilities of their operation under various conditions were presented, whereas the impact of temperature and concentration angle were considered in particular. The most modern solutions were presented, including Spin cell, Ephocell, Interdigitated Back Contact (IBC), Luminescent Solar Concentrator (LSC), High Concentration PhotoVoltaic Thermal (HCPVT), Concentration PhotoVoltaic (CPV), Telecontrolli. Results of current Polish research were given. In the years from 1985 to 2010 the increase from 17,5 % to 40,7 % in the efficiency of solar cells with concentrators was achieved [18].
Źródło:
Computer Applications in Electrical Engineering; 2014, 12; 462-474
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single – axis sun tracking unit with sensor control
Autorzy:
Bugała, A.
Frydrychowicz-Jastrzębska, G.
Powiązania:
https://bibliotekanauki.pl/articles/97565.pdf
Data publikacji:
2015
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
tracking system
spatial orientation
photovoltaics
inclination angle
microprocessor control
Opis:
The results of experimental verification of considerations conducted in [3] are presented, in terms of application single – axis tracking units, to increase the efficiency of the photovoltaic conversion, in comparison with fixed systems optimally oriented. The design and physical realization of a measurement stand is presented. A photovoltaic module inclination angle correlation algorithm, for a selected location and a measurement period, is described. The measurements were conducted in natural lighting conditions for different weather conditions. The current – voltage and power – voltage characteristics were compared for a fixed and vertically variable configuration. The value of the electric energy generated by tested photovoltaic modules in both cases was determined.
Źródło:
Computer Applications in Electrical Engineering; 2015, 13; 414-422
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of external conditions and orientation of PV module on the energetic gain
Autorzy:
Frydrychowicz-Jastrzębska, G.
Bugała, A.
Powiązania:
https://bibliotekanauki.pl/articles/97742.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
photovoltaic conversion
double-axis tracker
energetic gain
external conditions
Opis:
Paper presents the influence of external conditions such as: the latitude φ, the solar declination δ, the hour angle ω, number of sunny hours, cloud cover and orientation of photovoltaic module on the energetic gain. The results of the measurements of radiation power density that reaches the surface of the PV receiver for its different positions, for the geographic location of the cities of Poznań and Playa del Ingles and for different time periods (yearly and daily) are presented in a graphical form. The study compares also production of electric power and energy in different weather conditions: cloudy, partly cloudy and cloudless sky using two- axis tracking system and fixed with one optimal angle setting during the year. Analyzed systems are located in Poznan on the roof of the Faculty of Electrical Engineering building. Distribution of power density of solar radiation in different days of the year was also compared.
Źródło:
Computer Applications in Electrical Engineering; 2013, 11; 423-439
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 32

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