Autor: Tryba, A. M. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Surface functionalization of poly(L-lactide-co-glycolide) membranes with amphiphilic poly(2-oxazoline) for guided tissue regeneration and treatment of bone tissue defects
Autorzy:: Tryba, A. M.
Krok-Borkowicz, M.
Paluszkiewicz, C.
Pamuła, E.
Tematy:: poly (L-lactide-co-glycolide)
poly (ethylene glycol)
poly (2-oxazolines)
phase separation
Fourier transform infrared spectroscopy (FTIR)
osteoblast-like cells
guided tissue regeneration (GTR)
bone tissue engineering; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/283890.pdf Link otwiera się w nowym oknie
Opis:: The main challenge of this research was to functionalize the surface of poly(L-lactide-co-glycolide) (PLGA) membranes with amphiphilic poly(2-oxazoline) (POx) in order to change PLGA chemical state and properties. Poly(2-oxazolines) are very powerful polymers, which thanks to active pendant groups can be easily functionalized with biologically active molecules or peptides. The membranes were prepared by dissolving PLGA, POx, and poly(ethylene glycol) (PEG, 1000 Da) in methylene chloride (DCM), followed by PEG leaching. POx molecules were preferentially adsorbed at the interface PLGA-POx-PEG thanks to affinity to both hydrophilic (PEG) and hydrophobic (PLGA) chains. The properties of the membranes were characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and wettability tests. Cytocompatibility of the materials in contact with osteoblast-like MG-63 cells was studied by evaluation of cell viability (Alamar-Blue test), live/dead and phalloidin/DAPI staining. The results show that the presence of POx influenced topography of the PLGA membranes, but did not have an impact on their wettability. All membranes were fo-und cytocompatible with model osteoblasts. Presence of POx resulted in better cell adhesion as shown by microscopic studies after fluorescence staining for nuclei and cytoskeleton actin filaments. In summary, one-step phase separation process between PLGA, PEG, and POx, dissolved in DCM followed by drying and PEG leaching resulted in cytocompatible PLGA membranes with immobilised POx, which might be considered for guided tissue regeneration technique in periodontology and in bone tissue engineering.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: Silver nanoparticles for medical applications produced with the USE of stabilizing-reducing compounds derived from natural resources
Autorzy:: Tryba, A. M.
Malina, D.
Sobczak-Kupiec, A.
Pluta, K.
Tematy:: compounds
nanoparticles
medical applications; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/283963.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Whey protein isolate-aragonite composites for bone tissue engineering
Autorzy:: Gupta, D.
Kocot, M.
Serafim, A.
Jaegermann, Z.
Talari, A.
Riedel, S.
Tryba, A. M.
Stancu, I. C.
Pietryga, K.
Reilly, G.
Pamuła, E.
Douglas, T. E. L.
Tematy:: tissue engineering
composites
hydrogels; Pokaż więcej
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Powiązania:: https://bibliotekanauki.pl/articles/285230.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 4.

Tytuł:: An Analysys of Wear and Mechanical and Tribological Properties of High-Manganese Cast Steel Hardened by Different Methods
Analiza zużycia oraz własności mechanicznych i tribologicznych wysokomanganowego staliwa umacnianego różnymi metodami
Autorzy:: Tryba, D.
Kot, M.
Antosz, A.
Tematy:: Hadfield cast steel
wear
hardness
explosive hardening
static hardening
dynamic hardening
staliwo Hadfielda
zużycie
twardość
umacnianie wybuchowe
umacnianie statyczne
umacnianie dynamiczne; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/189552.pdf Link otwiera się w nowym oknie
Opis:: Properties of high manganese austenitic cast steel are not satisfactory; therefore, this material should be hardened. Currently, the commonly used method of hardening does not allow eliminating problems related to premature wear of railway frogs. Therefore, many studies have been carried out to find an alternative method to obtain improved wear resistance of such elements. The article presents an analysis of the mechanical and tribological properties of base and hardened, by different methods, high-manganese cast steel applied for turnouts. Tests were performed for three hardening methods: explosive, pressure-rolling, and dynamic impact. The results were compared with the properties of base material after saturation treatment. The conducted tests allowed the determination of hardness profiles of hardened surfaces, as well as the wear resistance and coefficient of friction, and the obtained results are very promising. Hardening by dynamic impact provided much better results in relation to presently used explosive hardening technology.
Właściwości austenitycznego wysokomanganowego staliwa nie są zadowalające, dlatego też materiał ten należy umacniać. Obecnie powszechnie stosowana metoda umacniania nie pozwala na wyeliminowanie problemów związanych z przedwczesnym zużyciem dziobów krzyżownic. W związku z tym wykonano badania mające na celu znalezienie alternatywnej metody dającej lepsze rezultaty. W pracy przeprowadzono analizę zużycia, właściwości mechanicznych oraz tribologicznych wysokomanganowego staliwa w wyniku zastosowania różnych technik umacniania. Podczas badań zastosowano metody umacniania wybuchowego, nagniatania naporowo-tocznego oraz dynamicznego. Wyniki porównano ze sobą oraz odniesiono je do właściwości materiału nieumocnionego, po przesycaniu. Badania pozwoliły na określenie twardości powierzchni, rozkładów twardości, wskaźnika zużycia objętościowego oraz współczynnika tarcia. Otrzymane wyniki badań są obiecujące. W wyniku nagniatania dynamicznego uzyskano lepsze wyniki w stosunku do badanego materiału umacnianego wybuchowo.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 5.

Tytuł:: Dye decomposition on P25 with enhanced adsorptivity
Autorzy:: Janus, M.
Wawrzyniak, B.
Tryba, B.
Morawski, A.W.
Tematy:: fotokatalizator
N-domieszkowanie
dwutlenek tytanu
barwnik azowy
visible-light active photocatalyst
N-doped
titanium dioxide
azo dye; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/779704.pdf Link otwiera się w nowym oknie
Opis:: The preparation method and the activity of the TiO2-P25/N doped photocatalyst based on commercial titanium dioxide (TiO2 AeroxideŽ P-25 Degussa, Germany) are presented. For the TiO2-P25/N preparation TiO2-P25 and gaseous ammonia were kept in a pressure reactor (10 bars) for 4 hours at the temperature of 200°C. This modification process changed the chemical structure of the TiO2 surface. The formation of NH4+ groups was confirmed by the FTIR measurements. Two bands in the range of ca. 1430 - 1440 cm-1 attributed to bending vibrations of NH4+ could be observed on the FTIR spectra of the catalysts modified with ammonia and the band attributed to the hydroxyl groups at 3300 - 3500 cm-1, which were not reduced after N-doping. The photocatalytic activity of the photocatalysts was checked through the decomposition of two dyes under visible light irradiation. The modified TiO2 thus prepared samples were more active than TiO2-P25 for the decomposition of dyes under visible light irradiation.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: New photocatalyst for decomposition of humic acids in photocatalysis and photo-Fenton processes
Autorzy:: Tryba, B.
Brożek, P.
Piszcz, M.
Morawski, A. W.
Tematy:: kwas huminowy
rozkład fotochemiczny
TiO2
FeC2O4
humic acid (HA)
photodecomposition
photo-Fenton process; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/779749.pdf Link otwiera się w nowym oknie
Opis:: Humic acid Leonardite IHSS standard was decomposed on TiO2 and TiO2 modifi ed by FeC2O4 via the photocatalysis and photo-Fenton processes under UV irradiation. Humic acid (HA) were favorable adsorbed on TiO2 surface and followed decomposition during UV irradiation faster on TiO2 than on the modifi ed samples. However, when H2O2 was added to the solution, the photo-Fenton process occurred on the prepared TiO2 samples, contained iron together with photocatalysis and high acceleration of HA decomposition was observed. In this case the mineralization degree was much higher than in the applied photocatalysis only, around 75% HA (with concentration of 18 mg/L) was mineralized after 3 h of adsorption and 5 h of UV irradiation in the presence of H2O2 and modifi ed TiO2 whereas on TiO2 mineralisation of HA occurred in around 45% only. The measured fl uorescence spectra of HA solutions showed that in the presence of H2O2 polycyclic aromatics were rapidly oxidized to the lower size products such as alcohols, aldehydes, ketones and carboxylic acids, what accelerated the process of HA decomposition.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Carbon modified TiO2 photocatalysts for water purification
Autorzy:: Morawski, A.W.
Janus, M.
Tryba, B.
Toyoda, M.
Tsumura, T.
Inagaki, M.
Tematy:: TiO2/AC
TiO2 dopowany węglem
TiO2 pokryty węglem
fotokataliza
carbon-doped TiO2
carbon-coated TiO2
photocatalysis; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/779326.pdf Link otwiera się w nowym oknie
Opis:: Carbon can form different structures with TiO2: carbon-doped TiO2, carbon coated TiO2 and composites of TiO2 and carbon. The presence of carbon layer on the surface of TiO2 as well as the presence of porous carbon in the composites with TiO2 can increase the concentration of organic pollutants on the surface of TiO2, facilitating the contact of the reactive species with the organic molecules. Carbon-doped TiO2 can extend the absorption of the light to the visible region by the narrowing of the band gap and makes the photocatalysts active under visible light irradiation. TiO2 loaded carbon can also work as a photocatalyst, on which the molecules are adsorbed in the pores of carbon and then they undergo the photocatalytic decomposition with UV irradiation. Enhanced photocatalytic activity for the destruction of some organic compounds in water was noticed on the carbon coated TiO2 and TiO2 loaded activated carbon, mostly because of the adsorptive role of carbon. However, in carbon-doped TiO2, the role of carbon is somewhat different, the replacement of carbon atom with Ti or oxygen and formation of oxygen vacancies are responsible for extending its photocatalytic activity towards the visible range.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 8.

Tytuł:: Photocatalytic mineralisation of humic acids using TiO2 modified by tungsten dioxide/ hydrogen peroxide
Autorzy:: Tryba, B.
Piszcz, M.
Borowiak-Paleń, E.
Grzmil, B.
Morawski, A. W.
Tematy:: kwasy humusowe
WO3/TiO2
powstawanie rodników
humic acids photodecomposition
OH radicals formation; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/779747.pdf Link otwiera się w nowym oknie
Opis:: TiO2 of anatase structure was modified by tungsten dioxide and H2O2 in order to obtain WO3-TiO2 photocatalyst with enhanced photocatalytic activity under both, UV and artificial solar light irradiations. WO2 was dissolved in 30% H2O2 and mixed with TiO2 in a vacuum evaporator at 70°C. Such modified TiO2 was dried and then calcinated at 400 and 600°C.The prepared samples and unmodified TiO2 were used for the photocatalytic decomposition of humic acids (Leonardite standard IHSS) in the aqueous solution under irradiations of both, UV and artificial solar light. Modification of TiO2 with tungsten dioxide and H2O2 improved separation of free carriers in TiO2 which resulted in the increase of OH radicals formation. Calcination caused an increase of anatase crystals and higher yield in OH radicals. The uncalcined samples showed high abilities for the adsorption of HA. Combination of adsorption abilities and photocatalytic activity of photocatalyst caused that the uncalcined TiO2 modified with WO2/H2O2 showed the shortest time of HA mineralisation. The mineralisation of HA under the artificial solar light was much lower than under the UV. It was proved that, although OH radicals are powerful in the decomposition of HA, adsorption can facilitate the contact of the adsorbed molecules with the photocatalyst surface and accelerate their photocatalytic decomposition.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Informacja

Wyszukujesz frazę "Tryba, A. M." wg kryterium: Autor