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Wyszukujesz frazę "Dutkiewicz, S." wg kryterium: Autor


Wyświetlanie 1-8 z 8
Tytuł:
A practical algorithm management of patients with benign prostatic hyperplasia
Autorzy:
Dutkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/3168.pdf
Data publikacji:
2008
Wydawca:
Instytut Medycyny Wsi
Tematy:
algorithm management
human disease
patient
benign prostate hyperplasia
hyperplasia
man
urinary outflow obstruction
enlargement
prostate
alpha1-adrenoreceptor blocker
5-alpha-reductase inhibitor
combination therapy
surgical treatment
Źródło:
Journal of Pre-Clinical and Clinical Research; 2008, 02, 2
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method to Produce Biodegradable Aliphatic- Aromatic Co-Polyesters with Improved Colour
Metoda wytwarzania biodegradowalnych kopoliestrów alifatyczno-aromatycznych o polepszonej barwie
Autorzy:
Dutkiewicz, S.
Wesołowski, J.
Chojnacki, D.
Ciechańska, D.
Powiązania:
https://bibliotekanauki.pl/articles/233385.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
biodegradable aliphatic-aromatic co-polyesters
colour parameters
yellowness index
metoda polikondensacji
biodegradowalne kopoliestry alifatyczno-aromatyczne (BAAC)
Opis:
A family of biodegradable aliphatic-aromatic co-polyesters (BAAC) was prepared by polycondensation in the melt. The synthesis was carried out with the addition of a small amount of alkaline metals salts which produced the effect of a distinctly improved colour of the polyesters as registered in the L*, a*, b* system. The yellow index of the tested samples was calculated from the chromaticity coordinates X, Y, Z. The colour could have been further improved by an exposure to UV radiation. No change was observed in the average molecular mass of the tested co-polyesters as result of the exposure, while an insignificant drop occurred of the inherent viscosity.
Metodą polikondensacji w stanie stopionym otrzymano grupę biodegradowalnych kopoliestrów alifatyczno-aromatycznych (BAAC). Syntezę prowadzono z udziałem niewielkiej ilości soli metali alkalicznych otrzymując znaczną poprawę barwy kopoliestrów rejestrowaną w systemie L*, a*, b. Na podstawie współrzędnych trójchromatycznych X, Y, Z, obliczono indeks żółtości badanych próbek. Dodatkową poprawę barwy uzyskano naświetlając próbki polimerów promieniowaniem UV. Po naświetlaniu nie stwierdzono zmian w średnich masach molowych badanych kopoliestrów, stwierdzono natomiast niewielkie spadki wartości lepkości inherętnej.
Źródło:
Fibres & Textiles in Eastern Europe; 2012, 6B (96); 84-88
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation on the Melt Processing of Biodegradable Aliphatic-Aromatic Polyester into Fibrous Products
Badania przetwórstwa stopowego biodegradowalnych poliestrów alifatyczno-aromatycznych na wyroby włókniste
Autorzy:
Twarowska-Schmidt, K.
Sulak, K.
Gałęski, A.
Piórkowska, E.
Wojtczak, M.
Dutkiewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/231912.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
biodegradable polyester
fibrous products
spunbond nonwoven
poliester biodegradowalny
wyroby włókiennicze
włókniny spunbond
Opis:
Research is described in the article concerning the melt processing of biodegradable aliphatic-aromatic copolyesters into fibrous products. Copolyesters containing 57 - 60% of a tri-component aliphatic portion (copolymers of butylene glycol and adypic-, succinic-, glutaric acid and terephtalic acid) prepared on a large laboratory scale were used in fibres and nonwoven from molten polymers. Fibres were made in a two-step process comprising spinning and drawing. Nonwovens were formed by the spunbond method. Main properties are given of the polymers and fibres, and the nonwoven made thereof. It was found that the aliphatic-aromatic copolyesters prepared reveal good spinability. Thermal properties: Tg < 0 °C and low Tm ~115 °C of fibres made of aliphatic-aromatic copolyesters limit their possible uses mainly to the production of disposables. A cheap method of making spunbond nonwoven which leads to ready textiles is recommended for the processing of the copolyesters.
W pracy opisano badania dotyczące przetwórstwa stopowego biodegradowalnego alifatyczno-aromatycznego kopoliestru na wyroby włókniste. Kopoliestry zawierające 57-60% trójskładnikowej części alifatycznej (kopolimery glikolu butylenowego i kwasów adypinowego, bursztynowego, glutarowego oraz kwasu tereftalowego) wytworzone w skali wielkolaboratoryjnej wykorzystano do formowania włókien i włóknin bezpośrednio ze stopu polimeru. Włókna wytwarzano w dwuetapowym procesie składającym się z przędzenia i rozciągania. Włókniny formowano metodąspod filiery (spun bonded). Podano podstawowewłaściwości polimerów oraz otrzymanych z nichwłókien i włóknin. Stwierdzono, żeopracowane ko poliestry alifatyczno-aromatyczne wykazują dobrą przędliwość. Z uwagi na właściwości termiczne: Tg < 0 °C oraz niską T m ~115 °C włókna z alifatyczno-aromatycznych kopoliestrówmogą być stosowane w ograniczonym zakresie, przede wszystkim na wyroby jednorazowego użytku. Ze względów ekonomicznych bardziej wskazany jest przerób tych polimerów na gotowe wyroby włókiennicze, np. włókniny spun bonded.
Źródło:
Fibres & Textiles in Eastern Europe; 2016, 6 (120); 58-64
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructure and Texture Changes of MgLiAl Alloys Composed of α or α + β Phases after Twist Channel Angular Pressing TCAP
Autorzy:
Dutkiewicz, J.
Rusz, S.
Kuc, D.
Hilser, O.
Bobrowski, P.
Kania, B.
Powiązania:
https://bibliotekanauki.pl/articles/356161.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
MgLiAl alloys
twist channel angular pressing
TCAP
texture after TCAP
Li2MgAl precipitates
Opis:
Two MgLiAl alloys of composition 4.5% Li and 1.5% Al (in wt.%) composed of α phase and of 9% Li, 1.5% Al composed of α (hcp) + β (bcc) phases were subjected to twist channel angular pressing (TCAP) deformation. Such deformation of α + β alloys caused less effective grain refinement than that of single α phase alloy. However, with increasing number of passes, grain size of single α phase alloy increased and that of β phase in two phase α + β alloy also grew, which suggested the effect of dynamic recrystallization. TEM studies allowed identifying particles of Li2MgAl phase of size of few μm. {001}<100> texture was observed in extruded alloy. Texture studies of extruded and TCAPed single phase hcp alloy indicated texture with {1010} plane perpendicular to the extrusion direction and {0002} plane parallel to the extrusion direction. Duplex α + β alloys showed poor texture development.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1827-1835
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of Microstructure and Properties of Extruded Mg-Li-Al Alloys of α and α+ β Phase Composition using ECAP Processing
Autorzy:
Dutkiewicz, J.
Rusz, S.
Maziarz, W.
Skuza, W.
Kuc, D.
Hilser, O.
Powiązania:
https://bibliotekanauki.pl/articles/1033018.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
83.50.-v
81.40.Lm
81.20.Fw
Opis:
Two magnesium based alloys containing 4.5 wt% Li and 1.5 wt% Al (alloy 1) and 9 wt% Li and 1.5 wt% Al (alloy 2) were cast under argon atmosphere and hot extruded at 350°C. Microstructure of alloy 1 consisted of hexagonal α phase of average grain size 20 μm and small aluminum rich precipitates being the most probably AlLi₂Mg phase. Alloy 2 in the extruded form consisted of lamellas of α+ β phases of thickness 5-20 μm and length above 100 μm. Significant grain refinement down to about 2 μ m was observed in one-phase hexagonal (hcp) alloy 1 after one pass of ECAP processing with helical component. Two-phase (hcp + bcc) alloy 2 showed higher non-homogeneity after the first equal channel angular pressing pass due to easier deformation of softer bcc phase, while both, α and β phases exhibited low angle grain boundaries. The hardness and the yield strength of the alloys were higher for alloy 1 (68 HV and 205 MPa, respectively) than those of alloy 2 (61 HV and 175 MPa). Subsequent equal channel angular pressing passes were performed at lower extrusion stress. The hardness of both alloys did not change significantly after subsequent equal channel angular pressing passes and revealed tendency to decrease. Two-phase alloy showed superplastic properties already after one equal channel angular pressing pass at 160°C with grain growth after superplastic tensile testing. Single phase hcp alloy did not show such properties after 1 pass, but after a few equal channel angular pressing passes it could be superplastically formed.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1303-1306
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Cu Layer Thickness on Morphology and Magnetic Properties of Co/Cu Nanowires
Autorzy:
Kac, M.
Kopec, M.
Cieniek, L.
Zarzycki, A.
Kac, S.
Maximenko, A.
Dutkiewicz, E.
Marszalek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1030657.pdf
Data publikacji:
2018-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Gw
75.60.Ej
75.75.Cd
78.67.Rb
81.07.Gf
82.45.Qr
Opis:
We studied changes of morphology and magnetic properties of Co/Cu multilayered nanowires, electrodeposited in polycarbonate membranes, as a function of Cu layer thickness. The morphology and structure of wire assemblies with an average diameter of 200 nm and length of 10 μ m, investigated by X-ray diffraction and scanning electron microscopy techniques, revealed polycrystalline structure of Cu and Co layers with smooth lateral surface of nanowires. Overdeposited nanowires created caps which showed flower-like dendrites with shape changing as a function of Cu thickness and electrodeposition parameters. Chemical composition of Co and Cu nanowires analysed by energy dispersive spectroscopy and proton induced X-ray emission showed Cu nanowires free from Co atoms while in Co nanowires, Cu contamination with concentration below 10% was observed. The oxidation traces observed in single-component Cu nanowires did not appear in multilayered nanowires. Magnetic measurements indicated easy axis of magnetization in membrane plane for nanowires with Cu thickness smaller than 20 nm, whereas for larger Cu thicknesses isotropic orientation of magnetization was observed. The presence of Cu atoms in single-component Co nanowires resulted in the appearance of magnetic anisotropy with easy axis along nanowire axis and the increase of coercivity value.
Źródło:
Acta Physica Polonica A; 2018, 133, 2; 302-305
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Investigations of Elemental Content, Microporosity, and Specific Surface Area of Porous Rocks Using PIXE and X-ray Microtomography Techniques
Autorzy:
Bielecki, J.
Bożek, S.
Dutkiewicz, E.
Hajduk, R.
Jarzyna, J.
Lekki, J.
Pieprzyca, T.
Stachura, Z.
Szklarz, Z.
Kwiatek, W.
Powiązania:
https://bibliotekanauki.pl/articles/1490118.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.70.Tx
91.65.-n
47.56.+r
Opis:
Determination of physical properties of porous geological materials is of great importance for oil industry. The knowledge of rocks properties is usually obtained from porosity studies such as pore size distribution, specific surface area determination, and hydrodynamic permeability calculations. This study describes determination of elemental composition and measurements of the particular physical properties of geological samples (porous sandstone rocks) by means of the nuclear and X-ray microprobes at the Institute of Nuclear Physics, Polish Academy of Sciences in Kraków, Poland. The special emphasis has been put on the computed microtomography method. Measurements have been carried out in close cooperation with Department of Geophysics, FGGEP AGH in Kraków, Poland. Chemical composition of the Rotliegend sandstone rock samples (few millimeters diameter), extracted from a borehole at 2679.6 m, 2741.4 m and 2742.4 m depth have been investigated using the 2.2 MeV proton beam (proton induced X-ray emission technique). Next, measurements of the porosity and the specific surface area of the pore space have been carried out using the X-ray microtomography technique. Basing on microtomographic data obtained with the high spatial resolution, simulations of the fluid dynamic in the void space of porous media have been carried out. Lattice Boltzmann method in the 3DQ19 geometrical model has been used in order to predict the hydraulic permeability of the media. In order to avoid viscosity-permeability dependence the multiple-relaxation-time model with half-way bounce back boundary conditions has been used. Computing power-consuming processing has been performed with the use of modern grid infrastructure.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 474-479
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Sediments Causing Damage to Water Meters in a Large Drinking Water Distribution System
Autorzy:
Kopeć, M.
Roman, M.
Kąc, M.
Budziak, A.
Paluszkiewicz, C.
Zarzycki, A.
Kąc, S.
Dutkiewicz, E.
Cichoń, T.
Bochnia, T.
Kwiatek, W.
Powiązania:
https://bibliotekanauki.pl/articles/1030652.pdf
Data publikacji:
2018-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.60.-k
78.70.En
61.05.cp
82.80.-d
82.80.Gk
Opis:
Preliminary studies on the sediments collected from water meters of Krakow water supply system were performed in the cooperation with the Municipal Water Supply and Sewage. Creation and deposition of sediments on the measuring devices installed in the water supply system is a serious technological and economical problem for water companies, defectively operating for this reason water meters must be replaced. It is evident that knowledge of the chemical and phase composition of sediments is an important step towards resolving the problem of impurities in water supply systems. Four different samples of sediments, coming from water meters, were investigated using the proton-induced X-ray emission, the X-ray diffraction, the Fourier transform infrared and Raman spectroscopy. The X-ray methods revealed presence of amorphous and fine-crystalline phases as well as high content of iron-based compounds. As a crystalline phase, the most frequently appeared: goethite, lepidocrocite, iron oxides (hematite, maghemite, magnetite), calcium carbonate, and quartz. In one of the samples, the nanocrystalline phase was found and identified as hydrous iron oxyhydroxide ferrihydrite. Vibrational spectroscopy methods confirmed the composition of crystalline phases as well as enabled to estimate the abundance of amorphous phase in samples.
Źródło:
Acta Physica Polonica A; 2018, 133, 2; 296-301
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-8 z 8

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