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Tytuł:
3D printed poly L-lactic acid (PLLA) scaffolds for nasal cartilage engineering
Autorzy:
Jabłoński, A.
Kopeć, J.
Jatteau, S.
Ziąbka, M.
Rajzer, I.
Powiązania:
https://bibliotekanauki.pl/articles/970900.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
3D printing
PLLA
nasal cartilages
scaffolds
tissue engineering
Opis:
In this study the scaffolds for nasal cartilages replacement were designed using a software called Rhino 3D v5.0. The software parameters considered for the design of scaffolds were chosen and the scaffolds were fabricated using Fused Deposition Modeling (FDM), a rapid prototyping technology, using poly(L-lactic acid) (PLLA) filament. The topographical properties of the scaffolds were calculated through 3D model simulation. The morphology of obtained scaffold was observed by Scanning Electron Microscopy (SEM). The biological properties, i.e. bioactivity of the scaffolds, were assessed in Simulated Body Fluid. On the basis of natural cartilages images the external shape of the scaffold was designed using the 3D modeling software. The FDM is a useful method in fabrication of 3D bioactive implants for cartilage tissue engineering. Thanks to the use of 3D modeling software, it is possible to prepare and manufacture artificial cartilage in a controlled manner. Artificial scaffold made of PLLA polymeric matrix may mimic natural one by shape, topography, geometry, pore size, and their distribution. In addition, it is possible to guarantee appropriately selected biological properties such as biocompatibility and high bioactivity of scaffolds, which was proved using scanning electron microscopy (SEM) analysis. The surface observation of the 3D printed scaffolds showed in vitro formation of apatite after immersion in the SBF. What is more, it is possible to match the scaffold not only to the large cavity but also individually to each patient.
Źródło:
Engineering of Biomaterials; 2018, 21, 144; 15-19
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of atomic force microscopy for studies of fractal and functional properties of biomaterials
Autorzy:
Kulesza, S.
Bramowicz, M.
Czaja, P.
Jabłoński, R.
Kropiwnicki, J.
Charkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/1075857.pdf
Data publikacji:
2016-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
06.30.Bp
68.37.Ps
68.35.bd
81.05.Bx
87.85.J-
Opis:
The paper presents results of numerical analysis of AFM images of a surface of sandblasted Ti6Al7Nb alloys before and after wet etching procedure usually used for preparing commercially viable dental implants. Obtained results demonstrate that etching procedure efficiently cleans the implants as it leaves almost pure Ti-Al-Nb surface with trace amounts of alkali metals and increased hydrophobicity. Apart of that, it turned out that simple statistical measures of the height variations (root mean square roughness) only slightly change upon the treatment procedure, especially for scan lengths below 20 μm. On the other hand, correlation analysis exhibits bifractal surface patterns composed of regular residues left on otherwise helical ridges of the base material. Etching leaves its fingerprint in fractal dimension, but not in the corner frequency.
Źródło:
Acta Physica Polonica A; 2016, 130, 4; 1013-1015
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cascade reactor system for methanogenic fermentation
Autorzy:
Jabłoński, S.
Krasowska, A.
Januszewicz, J.
Vogt, A.
Łukaszewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/115487.pdf
Data publikacji:
2011
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
biogas
anaerobic digestion
whey
UASB
methane
sewage
fermentation
multi-step digestion
Opis:
Methanogenic fermentation is promising method of obtaining environment-friendly energy. Moreover it can be used for disposal of sewage and other organic waste. However process complexity and susceptibility makes it difficult for application on a large scale. A new laboratory stand for studding of anaerobic digestion was developed. Three fermentation vessels and automated control system provides flexibility essential in investigation of digestion of different substrates and testing of different reactors configurations. Cheese whey is a troublesome dairy waste, potentially suitable for biogas production. Stable fermentation conditions for whey fermentation were obtained with the organic loading rate of 5 kg COD/m3 and methane production efficiency of 0,3 m3/kg COD. On the basis of obtained data the size of small biogas plant for average dairy was calculated.
Źródło:
Challenges of Modern Technology; 2011, 2, 4; 37-41
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Die profile optimization for forging constant velocity joint casings
Optymalizacja profili matryc do kucia obudowy przegubów homokinetycznych
Autorzy:
Gronostajski, Z.
Hawryluk, M.
Kaszuba, M.
Niechajowicz, A.
Polak, S.
Walczak, S.
Jabłoński, D.
Powiązania:
https://bibliotekanauki.pl/articles/351288.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kucie
optymalizacja
forging
constant velocity joint
optimization
Opis:
This paper presents the results of a search for an optimal shape of the die for forging CVJ (constant velocity joint) casings. The aim of the optimization was to increase tool life by reducing the pressures acting on the die. Therefore the minimization of the forging force was adopted as the optimization criterion. In order to verify the optimization results, the graphs of the calculated forging forces were compared with the real forging force registered by a dedicated measuring & archiving system. Then new dies with the optimal shape obtained from the numerical modelling were made and used in the industrial forging process. It was found that the maximum forging force values for the optimized dies were by about 10-15% lower than the ones for the dies with the original shape, which indicates an increase in die durability.
W pracy przedstawiono wyniki poszukiwania optymalnego kształtu matrycy dla procesu kucia obudowy przegubu homokinetycznego. Optymalizację przeprowadzono pod kątem zwiększenia trwałości narzędzi poprzez zmniejszenie obciążeń na narzędziach. Jako kryterium optymalizacyjne przyjęto minimalizację siły kucia, której wartość zależy między innymi od kształtu matrycy. Następnie wykonano nowe matryce z optymalnym kształtem uzyskanym z modelowania numerycznego i zrealizowano przemysłowy proces kucia dla zoptymalizowanych kształtów. Przeprowadzone badania wykazały, że maksymalne wartości sił kucia w drugiej operacji dla nowych narzędzi są mniejsze o około 10-15% w porównaniu do sił uzyskiwanych dla wcześniejszych kształtów matryc, co z kolei wskazuje na zwiększenie ich trwałości.
Źródło:
Archives of Metallurgy and Materials; 2011, 56, 2; 551-558
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Działanie wałowania na niektóre fizyczne właściwości gleby lekkiej i plonowanie żyta
Dejjstvie ukatyvanija na nekotorye fizicheskie svojjstva legkojj pochvy i urozhai rzhi
Rolling effect on some physical properties of light soil and yielding of rye
Autorzy:
Sienkiewicz, J.
Jablonski, W.
Wlodek, S.
Powiązania:
https://bibliotekanauki.pl/articles/806725.pdf
Data publikacji:
1988
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
gleby
gleby lekkie
wlasciwosci gleby
wlasciwosci fizyczne
plonowanie
walowanie
zyto
Opis:
В 1980-1982 гг. в местности Лясковице Олавске на почве очень хорошего ржаного комплекса (легкая глина на средне-тяжелой глине) проводились полевые исследования по влиянию укатывания с разной интенсивностью на некоторые физические свойства почвы и урожаи ржи. Сравнения проводились по отношению к контрольному варианту, причем они охватывали 4 способа сгущения верхнего слоя почвы с использованием гладкого катка, порожнего или наполненного водой. Установлено, что укатывание не оказывали влияния на влажность почвы после посева, а в засушливый год вызывала сильную дифференциацию в степени сгущения верхнего слоя почвы (1,31-1,56 г/см³ ). Укатывание вызывало также более мелкое помещение семян в почве. На cpaвниваемых объектах не установлено различий в урожаях зерна, что свидетельствует о высокой толерантности ржи на степень сгущения почвы в период посева (1,30-1,60 г/см).
Field investigations of the effect of differently intensive rolling on some physical properties of soil and the yields of rye were carried out in 1980-1982 at Laskowice Oławskie on the soil of a good ryeland complex (light soil on medium loam). Four ways of compaction of the upper soil layer using the plain roller both empty and filled up with water were compared in relation to control. It has been found that rolling did not exert any influence on the soil moisture level after sowing, while in dry year it caused a considerable differentiation in the upper layer density (1,31-1,56 g/cm³). Rolling caused a shallower placement of seeds in soil. In the treatments compared no differentiation of the grain yields has been found, what proves that rye is characterized by a considerable tolerance to the soil cohesion in the period of sowing (1.30-1.60 g/cm).
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 356
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of type, color and location of sticky pheromone traps on male moth catches of Cameraria ohridella
Autorzy:
Sukovata, L.
Slusarski, S.
Jablonski, T.
Kolk, A.
Powiązania:
https://bibliotekanauki.pl/articles/55115.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
horse chestnut
Lepidoptera
location
trap type
horse chestnut leafminer
moth
invasive pest
pheromone trap
Cameraria ohridella
new pest
pest
male
colour
Gracillariidae
Hippocastanaceae
Aesculus hippocastanum
Opis:
The horse chestnut leaf miner, Cameraria ohridella Deschka & Dimic (Lepidoptera: Gracillariidae), is a new invasive pest that has spread all over the Europe over the last 25 years. This paper presents research aimed to: 1) compare the effectiveness of sticky pheromone traps of various types (sizes and colors), 2) determine the effect of a trap location on moth catches. Studies were conducted in Warsaw and Falenty near Warsaw. No trap color preference by male moths was found in tests of white, blue and green barrier traps. Barrier traps had the largest sticky area (32 dm2) in comparison to PL-2 (5.625 dm2) and delta PL-1 (3.4 dm2) traps, thus they caught the highest total number of males, however PL-2 traps were the most effective (268-381 moths/dm2). The results of the studies suggest that to make traps with the C. ohridella pheromone be more effective they should: a) be located on a stem below a tree crown or in its lower part for the first C. ohridella generation, and in crowns for the second and later insect generations, b) be placed in some distance from a tree stem, if located in crowns.
Źródło:
Pestycydy; 2009, 1-4; 79-88
0208-8703
Pojawia się w:
Pestycydy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of an ATCA-based LLRF system at FLASH
Autorzy:
Simrock, S.
Butkowski, Ł.
Grecki, M.
Jeżyński, T.
Koprek, W.
Jabłoński, G.
Jałmużna, W.
Makowski, D.
Piotrowski, A.
Sakowicz, B.
Czuba, K.
Powiązania:
https://bibliotekanauki.pl/articles/397843.pdf
Data publikacji:
2010
Wydawca:
Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:
akcelerator
sterowanie
sprzężenie zwrotne
accelerator
control
feedback
Advanced TCA
Opis:
Future RF Control systems will require simultaneous data acquisition of up to 100 fast ADC channels at sampling rates of around 100 MHz and real time signal processing within a few hundred nanoseconds. At the same time the standardization of Low-Level RF systems are common objectives for all laboratories for cost reduction, performance optimization and machine reliability. Also desirable are modularity and scalability of the design as well as compatibility with accelerator instrumentation needs including the control system. All these requirements can be fulfilled with the new telecommunication standard ATCA when adopted to the domain of instrumentation. We describe the architecture and design of an ATCA based LLRF system for the European XFEL. Initial results of the demonstration of such a system at the FLASH user facility will be presented. Presented are the results of operating essential components of a prototype during the machine studies in January and March 2009.
Źródło:
International Journal of Microelectronics and Computer Science; 2010, 1, 1; 48-51
2080-8755
2353-9607
Pojawia się w:
International Journal of Microelectronics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exchange coupling effects in naturally oxidised ultrathin iron film
Autorzy:
Dawczak-Dębicki, H.
Marczyńska, A.
Rogowska, A.
Wachowiak, M.
Nowicki, M.
Pacanowski, S.
Jabłoński, B.
Czajka, R.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1050673.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.-i
75.70.Kw
Opis:
Oxidation process of Fe films under atmospheric conditions is depth limited such that an oxide covering layer with a well-defined thickness is formed by which the underlying metal is prevented from further oxidation. Iron thin film with an initial thickness d_{i}=4 nm was deposited onto 1.6 nm - V(110) buffer layer using UHV magnetron sputtering. The planar growth of Fe oxides was revealed by atomic force microscopy. X-ray photoelectron spectroscopy studies performed after 250 days of oxidation revealed formation of a hematite (α-Fe₂O₃) ultrathin film on the metallic rest of iron. Furthermore, low temperature magnetic measurements of the oxidised Fe ultrathin film revealed an exchange anisotropy which is imposed to the metallic rest. As a result, we have observed at low temperatures a shift and broadening of the hysteresis loops due to the exchange interaction at the metal-oxide interface.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 601-604
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Acoustic Flow Analysis Inside a Section of an Acoustic Waveguide
Autorzy:
Weyna, S.
Mickiewicz, W.
Pyła, M.
Jabłoński, M.
Powiązania:
https://bibliotekanauki.pl/articles/178109.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sound intensity
laser anemometry
acoustics flow
sound visualization
Opis:
Noise propagation within ducts is of practical concern in many areas of industrial processes where a fluid has to be transported in piping systems. The paper presents experimental data and visualization of flow in the vicinity of an abrupt change in cross-section of a circular duct and on obstacles inside where the acoustic wave generates nonlinear separated flow and vortex fields. For noise produced by flow wave of low Mach number, laminar and turbulent flows are studied us- ing experimental sound intensity (SI) and laser particle image velocimetry (PIV) technique adopted to acoustics (A-PIV). The emphasis is put on the development and application of these methods for better understanding of noise generation inside the acoustic ducts with different cross-sections. The intensity distribution inside duct is produced by the action of the sum of modal pressures on the sum of modal particle velocities. However, acoustic field is extremely complicated because pressures in non-propagating (cut-off) modes cooperate with particle velocities in propagating modes, and vice versa. The discrete frequency sound is strongly influenced by the transmission of higher order modes in the duct. By under- standing the mechanism of energy in the sound channels and pipes we can find the best solution to noise abatement technology. In the paper, numerous methods of visualization illustrate the vortex flow as an acoustic velocity or sound intensity stream which can be presented graphically. Diffraction and scattering phenomena occurring inside and around the open-end of the acoustic duct are shown.
Źródło:
Archives of Acoustics; 2013, 38, 2; 211-216
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the thickness of Ni-P coating applied on 7075 aluminum alloy on its hardness
Autorzy:
Czapczyk, K.
Siwak, P.
Jabłoński, P.
Furmański, Ł.
Grobelny, P.
Legutko, S.
Powiązania:
https://bibliotekanauki.pl/articles/957945.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
aluminum alloy AW-7075
Ni-P coating
hardness
Opis:
The paper presents the results of hardness tests of aluminum alloy AW-7075 (for plastic processing) and Ni-P chemical coatings (nickel-phosphorus) which had been applied by the no-current method. Coatings of various thickness have been made and their influence on the increase of the top layer hardness has been determined, as well as the increase of the hardness of the coating and substrate system after puncturing the coating with an indenter. The purpose of the investigation was to determine the possibility of applying the Ni-P coating for selected technical applications, among others, by the selection of its optimum thickness on the hard aluminum alloy and by the determination of the deformation resistance of the top layer if the given coating.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 32; 53-58
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Valence Band Modifications on Hydrogen Absorption in Zr-Pd Alloy Thin Films
Autorzy:
Jabłoński, B.
Pacanowski, S.
Werwiński, M.
Marczyńska, A.
Dawczak-Dębicki, H.
Szajek, A.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1030742.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.22.-f
82.80.Pv
Opis:
We study the valence band modifications of in-situ prepared nano- and polycrystalline Pd-Zr alloy thin films using X-ray photoelectron spectroscopy. Results were compared with valence bands calculated by ab initio methods. Furthermore, hydrogen absorption and desorption kinetics under pressure of about 570 mbar were studied in Pd covered nanocrystalline ZrPd₂ alloy thin film. Results showed that modifications of the valence band of the nanocrystalline alloy thin film could significantly influence on hydrogen absorption and desorption process.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 620-623
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of ~^-radiation on Dy[3+] doped LiNbO[3] single crystals
Autorzy:
Kaczmarek, S. M.
Łukasiewicz, T.
Pracka, I.
Jabłoński, R.
Boulon, G.
Kaczmarek, B.
Warchoł, S.
Powiązania:
Biuletyn Wojskowej Akademii Technicznej 1998, nr 7-8, s. 101-112
Data publikacji:
1998
Tematy:
Monokryształy
Kryształy
Promieniowanie
Chemia
Opis:
Wpływ promieniowania gamma na domieszkowane Dy[3+] monokryształy LiNbO[3].
Rys.; bibliogr.; Abstr., Rez., streszcz.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Magnetisation and hydrogenation of Mg/Ni multilayers
Autorzy:
Pacanowski, S.
Marczyńska, A.
Dawczak-Dębicki, H.
Jabłoński, B.
Szymański, B.
Smardz, L.
Powiązania:
https://bibliotekanauki.pl/articles/1048263.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.70.Cn
61.10.Nz
Opis:
In this contribution we have studied magnetisation of Mg/Ni multilayers (MLs) to characterise the alloing effect near interfaces. The layered structure was characterised by standard X-ray diffraction. The MLs were deposited by UHV magnetron sputtering onto naturally oxidised Si(100) substrates. Results showed, that due to Mg-Ni alloy formation near interfaces the magnetizations of the MLs were strongly reduced. Effective "dead" Ni layer thickness was estimated as 1.2 nm at room temperature (RT). Furthermore, hydrogen absorption kinetics at a pressure of about 1000 mbar was studied at RT in Pd covered Mg/Ni MLs using four-point resistivity measurements. Results showed that the fastest initial rise in resistance in the first 9 s was observed for d_{Ni}=3.5 nm.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 617-619
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mean Escape Depth of Signal Photoelectrons from Amorphous and Polycrystalline Solids
Autorzy:
Tilinin, I. S.
Jabłoński, A.
Lesiak-Orłowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/1931766.pdf
Data publikacji:
1994-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.80.Bm
72.10.Bg
79.60.-i
Opis:
Escape depth of photoelectrons leaving a target without being scattered inelastically was submitted to extensive theoretical analysis. Dependence of the mean escape depth on the X-ray angle of incidence and the electron initial angular distribution inside the sample was considered. The Monte Carlo algorithm was developed basing on a differential elastic scattering cross-section calculated within the partial-wave expansion method and a realistic electron-atom interaction potential. The mean escape depth was evaluated by means of the depth distribution function found analytically by solving a kinetic equation and by the Monte Carlo technique. The agreement between the results obtained from two methods is excellent. Elastic scattering was found to reduce considerably the escape depth. This reduction may reach up to 25% in the case of heavy elements in the practical X-ray photoelectron spectroscopy analysis. It was shown that the mean escape depth expressed in units of the electron transport mean free path is a universal function of the ratio of the inelastic to the transport mean free paths, the asymmetry parameter and the X-ray angle of incidence. A simple explicit expression for this function is proposed.
Źródło:
Acta Physica Polonica A; 1994, 86, 5; 845-852
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling, fabrication and characterization of 3D PLLA scaffolds plotted with commercial printer
Autorzy:
Jablonski, A.
Kopec, J.
Jatteau, S.
Śliwka, M.
Ziąbka, M.
Rajzer, I.
Powiązania:
https://bibliotekanauki.pl/articles/286129.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
scaffolds
medical implants
PLLA
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 84
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
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