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Wyszukujesz frazę "polkowski, W." wg kryterium: Wszystkie pola


Tytuł:
Wyniki badań nad nową odmianą kostrzewy trzcinowej
Rezultaty ispytanijj novogo sorta ovsjanicy trostnikovidnojj
Results of tests of a new tall fescue variety
Autorzy:
Goral, S.
Sybilska, A.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/795064.pdf
Data publikacji:
1988
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Opis:
Испытания проведенные в Радзикове с сортом Рахеля показали возможность достижения урожая 13 т сухого вещества с гектара. Рассматриваемый сорт характеризуется очень ранним началом роста и равномерным распределением урожаев.
The tests carried out at Radzików on the Rahela variety have proved the possibility of getting the cut yield reaching 13 t of dry matter from hectare. This variety is characterized by a very early growth start and uniform distribution of yields.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1988, 366
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EBSD Strain Analysis of CuZn10 Cast Alloy During Cavitational Wear
Autorzy:
Jasionowski, R.
Zasada, D.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/380062.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
EBSD method
cavitation
cavitational erosion
strain analysis
metoda EBSD
kawitacja
erozja kawitacyjna
analiza odkształceń
Opis:
Microstreams of liquid formed during the implosion of cavitation bubbles and the effects of pressure waves coming from disappearing bubbles are the main causes of damage of the washed surface, leading to loss of material (the cavitation erosion). Repeated cavitation implosions cause non-uniform stress state resulting in the strengthening of the surface layer, change of micro-geometry and surface cracks leading to detachment of the material particles. Course of cavitation erosion process depends on the effects of plastic deformation at the beginning of the destruction. The aim of this study was analysis of plastic deformation by EBSD method of CuZn10 cast alloy at the beginning of the cavitation destruction process.
Źródło:
Archives of Foundry Engineering; 2013, 13, 1 spec.; 51-56
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Crystalographic Texture on Cavitation Wear Resistance of As-Cast CuZn10 Alloy
Autorzy:
Jasionowski, R.
Polkowski, W.
Zasada, D.
Powiązania:
https://bibliotekanauki.pl/articles/355595.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
texture
cavitation
cavitation erosion
electron backscatter diffraction
EBSD
CuZn10 alloy
Opis:
Analysis of a crystallographic texture (a preferred orientation) effect on cavitation wear resistance of the as-cast CuZn10 alloy, has been conducted in the present paper. The experiment was conducted on the CuZn10 alloy samples with <101>//ND or <111>//ND preferred orientations (where the ND denotes direction that is perpendicular to the exposed surface). The cavitation resistance examinations have been carried out on three different laboratory stands (namely, vibration, jet-impact and flow stands) that are characterized by a various intensity and a way of cavitation’s excitement. Obtained results point towards a higher cavitation resistance of the CuZn10 alloy with the <111>//ND preferred orientation.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 935-940
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Destruction Mechanism of Z10400 Zn-based Alloy Subjected to Cavitational Erosion
Autorzy:
Jasionowski, R.
Zasada, D.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/380734.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zinc alloy
cavitation wear
Electron Backscattered Diffraction (EBSD)
stop cynku
zużycie kawitacyjne
dyfrakcja elektronów wstecznie rozproszonych
Opis:
Z10400 zinc-based alloy has a very good casting properties and high resistance to corrosion. These two advantages make that Z10400 zinc-based alloy is commonly used for cathodic protection of hulls of ships. Cathodic anodes made of Z10400 zinc-based alloy in the propeller and flap rudder areas are also additionally exposed to the cavitation erosion. The aim of this work was to determine the cavitation erosion resistance of Z10400 zinc-based alloy, which is applied as protectors in cathodic protection of hulls of ships. The examination of cavitational erosion was carried out on a jet-impact measuring device. Study of the mechanism of the destruction of Z10400 alloy based on analysis was performed with scanning electron microscope Quanta 3d FEG and electron back scattered diffraction (EBSD) method.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 48-52
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Destruction Mechanism of ZnAl4 as Cast Alloy Subjected to Cavitational Erosion Using Different Laboratory Stands
Autorzy:
Jasionowski, R.
Polkowski, W.
Zasada, D.
Powiązania:
https://bibliotekanauki.pl/articles/381763.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cavitation
cavitation wear
alloy ZnAl
cast alloy
destruction mechanism
kawitacja
zużycie
stop ZnAl
stop żeliwa
destrukcja
Opis:
The main reason of a cavitational destruction is the mechanical action of cavitation pulses onto the material’s surface. The course of cavitation destruction process is very complex and depends on the physicochemical and structural features of a material. A resistance to cavitation destruction of the material increases with the increase of its mechanical strength, fatigue resistance as well as hardness. Nevertheless, the effect of structural features on the material’s cavitational resistance has been not fully clarified. In the present paper, the cavitation destruction of ZnAl4 as cast alloy was investigated on three laboratory stands: vibration, jet-impact and flow stands. The destruction mechanism of ZnAl4 as cast alloy subjected to cavitational erosion using various laboratory stands is shown in the present paper.
Źródło:
Archives of Foundry Engineering; 2016, 16, 1; 19-24
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
EBSD Strain Analysis of CuZn10 Alloy in As-cast State and After Plastic Working and Annealing During Cavitational Wear
Autorzy:
Jasionowski, R.
Zasada, D.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/381392.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Electron Backscattered Diffraction (EBSD)
cavitation wear
strain analysis
dyfrakcja elektronów wstecznie rozproszonych
zużycie kawitacyjne
analiza odkształceń
Opis:
Electron backscatter diffraction (EBSD) system in conjunction with scanning electron microscope (SEM) allows performing full material characterization which include analysis of individual grain orientations, crystal orientation, global and local texture, phase identification and distribution or microstrain mapping. EBSD technique may be also applied for assessing lattice strain introduced during local plastic deformation due to its close relationship with development of dislocation substructure. The aim of this study was analysis of surface deformation by EBSD method of CuZn10 alloy in as-cast state and after plastic working and annealing, with different grain size at the beginning of the cavitation destruction process. The local changes of plastic deformation inside each grain were expressed by Grain Orientation Spread (GOS) and Kernel Average Misorientation (KAM) parameters.
Źródło:
Archives of Foundry Engineering; 2013, 13, 2 spec.; 53-60
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of aluminum content on the microstructure and cavitation wear of feal intermetallic alloys
Autorzy:
Jasionowski, R.
Zasada, D.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/386821.pdf
Data publikacji:
2014
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
intermetallic alloys
cavitation
cavitation wear
Electron Backscattered Diffraction (EBSD)
stopy międzymetaliczne
kawitacja
EBSD
Opis:
Intermetallic-based alloys (so called intermetallics) of the Fe-Al binary system are modern construction materials, which in re- cent decades have found application in many branches of the power, chemical and automotive industries. High resistance of FeAl based alloys to cavitational erosion results first of all from their high hardness in the as-cast state, large compressive stresses in the material, as well as homogeneous structure. In the present paper, the effect of aluminum content on the microstructure, texture and strain imple- mented upon cavitation wear of FeAl intermetallic alloys, have been analyzed by field emission gun scanning electron microscopy (FEG SEM) and electron backscatter diffraction (EBSD) analysis. Obtained results of structural characterization indicates that with increasing aluminium content effects of orientation randomization (weakening of <100>//ND casting texture), grain refinement and rising of mechani- cal strenght (and so cavitational resistance) take place.
Źródło:
Acta Mechanica et Automatica; 2014, 8, 1; 49-52
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Nanometric α-Al2O3 Addition on Structure and Mechanical Properties of Feal Alloys Fabricated by LENS Technique
Autorzy:
Łazińska, M.
Durejko, T.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/356020.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
FeAl intermetallics
nano-Al2O3 addition
Laser Engineered Net Shaping
Opis:
Results of the first principle study on a fabrication of FeAl intermetallic based alloy with an addition of nanometric αAl2O3 (n-Al2O3) particles by the LENS method and a subsequent characterization of the as received materials’ structure and properties, are shown in the present work. A series of samples were manufactured using LENS technique while a control of temperature and the size of melted metal pool. The presence of ceramics nanoparticles was not directly confirmed by microscopy observations. Neither aluminum nor oxygen content was not elevated in the material with n-Al2O3 content. Although, indirect methods revealed influence of n-Al2O3 addition on the manufactured elements structure. Analyses of porosity has shown that addition of 2% vol. n-Al2O3 significantly decreases this feature (~1%), as compared to the reference material made of pure FeAl intermetallic alloy (~5%). The addition of n-Al2O3 causes an increase of grain size in Fe40Al intermetallic alloy. An oxidation resistance has been also improved what was associated to the n-Al2O3 addition. Four times lower increase of samples mass was noticed for sample with the n-Al2O3 addition as compared to the pure Fe40Al intermetallic alloy.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 3; 1703-1712
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of various imaging modes in scanning electron microscopy during evaluation of selected Si/refractory sessile drop couples after wettability tests at ultra-high temperature
Autorzy:
Polkowska, A.
Warmuzek, M.
Kalarus, J.
Polkowski, W.
Sobczak, N.
Powiązania:
https://bibliotekanauki.pl/articles/391383.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
scanning electron microscopy
sessile drop method
silicon
refractories
in-lens detectors
Opis:
In this work, FEI SciosTM field emission gun scanning electron microscope (FEG SEM) equipped with a unique combination of analytical and imaging detectors was utilized to examine structure and chemistry of selected Si/ refractory couples. The couples were obtained in wettability tests performed by the sessile drop method coupled with contact heating of a refractory substrate (h-BN, SiC) at ultra-high temperature (up to 1750°C). The SEM observations were carried out on top-views of the couples, in order to evaluate surface and interfacial phenomena in Si/h-BN and Si/SiC systems. A full range of available detectors (e.g. classical Everhart-Thornley detector (ETD) or advanced in-lens detectors) working under various operation modes (secondary electrons (SE), backscattered electrons (BSE), a mixed mode), were used upon analyses in order to reveal specific features of obtained structures.
Źródło:
Prace Instytutu Odlewnictwa; 2017, 57, 4; 337-344
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ks. Ignacy Polkowski (1833-1888) w świetle jego spuścizny przechowywanej w Archiwum Kapitulnym na Wawelu
Autorzy:
Urban, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2158299.pdf
Data publikacji:
2022-12-22
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II
Tematy:
chapter archives in Kraków
Rev. Ignacy Polkowski
Wawrzyniec Polkowski
Diocese of Kraków
archival legacy
archiwum kapitulne w Krakowie
ks. Ignacy Polkowski
diecezja krakowska
spuścizna archiwalna
Opis:
Życie i działalność ks. Ignacego Polkowskiego w świetle jego dokumentów osobistych przechowywanych w archiwum kapitulnym na Wawelu można sprowadzić do trzech miejsc: archiwów, bibliotek i muzeów kościelnych. Już jako student zaczął gromadzić księgozbiór, który ostatecznie liczył ok. 10 000 dzieł i był bogaty w inkunabuły, polonika XVI wieku, kopernikana i starodruki. Tematycznie miał charakter zbioru teologicznego i historycznego. Po powstaniu styczniowym, gdy ks. I. Polkowski osiadł w majątku hrabiów Skórzewskich w wielkopolskim Lubostroniu, został bibliotekarzem porządkującym ich zbiory. W wyniku kulturkampfu musiał opuścić Wielkopolskę i przybył do Krakowa, gdzie został dyrektorem archiwum kapitulnego na Wawelu. Rozpoczął wówczas porządkowanie jego zasobu i edytowanie najcenniejszych dokumentów. Jego praca (1878-1888) odcisnęła silne piętno na tej instytucji. Odtąd mówi się o archiwum przed I. Polkowskim i po I. Polkowskim. Duchowny w czasie pracy w Lubostroniu brał udział w pracach archeologicznych, które dostarczyły wielu obiektów dla muzeów archeologicznych. Równocześnie zajmował się medalierstwem. Przedstawiony biogram ks. I. Polkowskiego powstał na podstawie materiałów archiwalnych dotychczas niedostępnych dla historyków, a znajdujących się w archiwum kapitulnym w Krakowie. Są to dokumenty osobiste ks. I. Polkowskiego gromadzone przez niego samego. Dlatego też prezentowany artykuł jest najbardziej szczegółowym opublikowanym biogramem tego kapłana. Przybliżono w nim działalność naukową ks. I. Polkowskiego, realizowaną najpierw w środowisku warszawskim, następnie poznańskim, a na końcu krakowskim. Przedstawiono go również jako świadka przełomowych wydarzeń na ziemiach polskich w XIX wieku: powstania styczniowego w Warszawie, kulturkampfu w Wielkopolsce, a w Krakowie – autonomii galicyjskiej i m.in. powstania Akademii Umiejętności.
The life and activities of Rev. Ignacy Polkowski, in light of his personal documents stored in the Wawel Chapter Archives, can be summarised by referring to three places: archives, libraries and church museums. Already as a student, he began accumulating a book collection that eventually numbered about 10,000 works and was rich in incunabula, 16th-century polonica, Copernican works and old prints. Thematically, it had the character of a theological and historical collection. After the January Uprising, when Rev. I. Polkowski settled in the estate of the Counts of Skórzewski family in Lubostroń in Greater Poland, he became a librarian organizing their collections. As a result of Kulturkampf, he had to leave Greater Poland and arrived in Kraków, where he became director of the Wawel Chapter Archives, and began arranging its resources and editing the most valuable documents. His work (1878–1888) left a lasting mark on the institution. Henceforth, the archive has been referred to either before I. Polkowski or after I. Polkowski. While working in Lubostroń, the clergyman took part in archaeological work that provided many objects for archaeological museums. At the same time, he was involved in medal making. The presented biographical note of Rev. I. Polkowski was developed on the basis of archival materials hitherto unavailable to historians, located in the chapter archives in Kraków. These are the personal documents of Rev. I. Polkowski collected by himself, which make the article presented hereunder his most detailed published biography. It outlines the scientific activities of Rev. I. Polkowski, carried out first in Warsaw, then in Poznań, and finally in Kraków. He was also presented as a witness to landmark events in the Polish lands in the 19th century: the January Uprising in Warsaw, Kulturkampf in Greater Poland, the Galician autonomy in Kraków, and the establishment of the Polish Academy of Learning, to mention a few.
Źródło:
Archiwa, Biblioteki i Muzea Kościelne; 2022, 119; 437-457
0518-3766
2545-3491
Pojawia się w:
Archiwa, Biblioteki i Muzea Kościelne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioimpedance vector pattern in women with breast cancer detected by bioelectric impedance vector analysis. Preliminary observations
Autorzy:
Malecka-Massalska, T.
Chara, K.
Smolen, A.
Kurylcio, A.
Polkowski, W.
Lupa-Zatwarnicka, K.
Powiązania:
https://bibliotekanauki.pl/articles/50874.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2012, 19, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Twice malignant transformation of hypertrophic lichen planus
Autorzy:
Krasowska, D.
Kozlowicz, K.
Kowal, M.
Kurylcio, A.
Budzynska-Wlodarczyk, J.
Polkowski, W.
Chodorowska, G.
Powiązania:
https://bibliotekanauki.pl/articles/50185.pdf
Data publikacji:
2012
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2012, 19, 4
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Awareness of gastrointestinal tract malignancies among the population of Lublin province (Eastern Poland) - a cross-sectional study
Autorzy:
Barbecka, M.
Kolasińska-Bzoma, M.
Kolasińska-Gliwa, E.
Polkowski, W.
Offerhaus, G.J.A.
Maciejewski, R.
Sitarz, R.
Powiązania:
https://bibliotekanauki.pl/articles/2085871.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
awareness of gastrointestinal malignancies
cancer prevention
primary health care
prophylaxis
risk factors
Opis:
Introduction. Currently, malignancies are the most severe medical problems worldwide. Numerous, already known risk factors in carcinogenesis could be potentially avoided. Some cancer risk factors have been recognized and have become the targets of primary prophylaxis. Objective. The aim of the study was to ascertain the state of knowledge about risk factors, primary prevention and early detection of malignancies of gastrointestinal tract (GIT) in the urban and rural population of the Lublin province in Eastern Poland. Materialas and method. The study was cross-sectional. The originally designed questionnaire was applied to the group of 1,352 patients, representatives of both the rural and urban environments of the Lublin province during random appointments with their general practitioner (GP). Results. The study showed low awareness of the issues connected with GIT malignancies within the studied group. The problem was particulary apparent in the rural population. Conclusions. In order to raise general awareness of cancer, different means should be applied in urban and rural populations. GPs and the media were found to have the leading rols in the promotion of primary prevention.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 469-475
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wetting behavior of Si-13.5B alloy on polycrystalline h-BN-based substrates
Autorzy:
Polkowski, W.
Sobczak, N.
Nowak, R.
Kudyba, A.
Bruzda, G.
Polkowska, A.
Homa, M.
Turalska, P.
Shuleshova, O.
Kaban, I.
Powiązania:
https://bibliotekanauki.pl/articles/391820.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Odlewnictwa
Tematy:
silicon-boron alloys
hexagonal boron nitride
wettability
interfaces
AMADEUS Project
Opis:
In this work, for the first time the results of an experimental evaluation of the high temperature behavior of molten Si-B alloy in contact with refractory materials at temperatures up to 1750°C, under static argon atmosphere (p = 850– 900 mbar), is shown. The material investigated, having a nominal chemical composition of Si-13.5B (at. %), was fabricated by using the crucible-less electric arc-melting process assisted by the levitation drop method. The wettability of the molten alloy in contact with commercial hexagonal boron nitride (h-BN) substrates was evaluated by means of especially developed sessile drop technique combined with a contact heating procedure. It was found that both couples show a lack of wettability in the whole tested temperature range (the measured contact angle was θ > 130°). The more stable behavior in contact with molten Si-13.B alloy, evidenced by higher θ values and a lack of drop vibration during the high temperature exposition, was observed for the h-BN based composite substrate.
Źródło:
Prace Instytutu Odlewnictwa; 2017, 57, 4; 321-326
1899-2439
Pojawia się w:
Prace Instytutu Odlewnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Altered tissue electrical properties in women with breast cancer – Preliminary observations.
Autorzy:
Malecka-Massalska, T.
Chara, K.
Golebiowski, P.
Wladysiuk, M.
Smolen, A.
Kurylcio, A.
Zuchora, B.
Zubrzycki, J.
Orlowska-Kowalik, G.
Lupa-Zatwarnicka, K.
Polkowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/51083.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Opis:
Introduction and objectives: In the United States, breast cancer (BC) is the most common non-skin cancer. In Poland, it is estimated that the number of new breast cancer cases affects about 13,500 women each year. There are many methods for nutritional status assessment. One of them is bioimpedance analysis (BIA). Direct bioimpedance measures (resistance, reactance, phase angle (PA)) determined by bioelectrical impedance analysis (BIA) detectf changes in tissue electrical properties. The study was conducted to investigate whether there are any tissue electrical differences in patients with breast cancer. Materials and methods: The direct bioimpedance measures determined by bioelectrical impedance analysis (BIA) were performed on 34 patients with BC and 34 healthy volunteers. The measurements were made with ImpediMed bioimpedance analysis SFB7 BioImp v1.55 (Pinkenba Qld 4008, Australia). Results: Reactance and resistance at 50 kHz was found to be significantly greater in patients with BC than in the control group (53.59° ± 1.53 vs. 47.26° ± 1.25, respectively, p=0.0031; 603.24° ± 15.38 ohm vs. 515.87° ± 11.48 ohm, respectively, p=0.00004). Conclusion: Pre-surgical patients diagnosed with BC have altered tissue electrical properties. Further observations of a larger patient group would be valuable to calculate survival, validate the prognostic significance of PA, and monitor nutritional and therapeutic interventions in this patient population.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł

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