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Tytuł:
Evaluation of the quality of titanium oxide and copper oxide layers by means of optical microscopy
Autorzy:
Głuszek, A.
Sawicka-Chudy, P.
Wisz, G.
Sibiński, M.
Cholewa, M.
Powiązania:
https://bibliotekanauki.pl/articles/101772.pdf
Data publikacji:
2018
Wydawca:
Instytut Polityki Energetycznej im. Ignacego Łukasiewicza
Tematy:
titanium oxide
copper oxide
optical microscopy
histograms
Opis:
The aim of this paper is to analyse high-resolution optical images of the surface layers of titanium oxide and copper oxide. The materials were produced using the PREVAC Modular Platform for layer deposition located at the University of Rzeszów. Images with a magnification of 50x were obtained using an optical microscope. On the basis of the results obtained, the quality of the layers was evaluated based on the image analysis. The quantitative method of analysis was applied, as a result of which the conditions of the manufacturing process for which the obtained layers had the highest homogeneity were indicated. The minimum range of grey shade counting was from 65 to 150 and the maximum range from 135 to 220. The standard deviation was from 8 to 40%.
Źródło:
Energy Policy Studies; 2018, 1 (2); 39-51
2545-0859
Pojawia się w:
Energy Policy Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of Nanocomposite Sulfonated PVDF Membrane
Autorzy:
Juliandri, Juliandri
Rukiah, Rukiah
Ernawati, E. E.
Silitonga, M. P. R.
Nasir, M.
Powiązania:
https://bibliotekanauki.pl/articles/1167197.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
PVDF membrane
nanocomposites
silicon oxide
titanium oxide
Opis:
As a commercial fuel cell membrane, Nafion has disadvantages such as low stability at high temperature and low conductivity at low humidity. Sulfonated Polyvinylidene fluoride (PVDF) is known for good mechanical and thermal properties as a membrane. The purpose of this research is to synthesis a nanocomposite PVDF-TiSiO4 membrane as a potential replacement of Nafion. PVDF sulfonation was performed using concentrated sulfuric acid. The nanocomposites TiSiO4 were synthesized from TiCl4 and TEOS. Ultrasonification was used to insert the nanomaterial to the sulfonated membrane. The infrared spectra analysis shows the peak for the Ti-O-Si angel. SEM-EDX analysis shows that the nanocomposite PVDF-TiSiO4 membrane contents titanium oxide. The conductivity analysis shows the increasing of conductivity on addition of nanomaterials.
Źródło:
World Scientific News; 2018, 105; 218-224
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of Zn2+, Cd2+ and Cu2+ on zeolites coated by manganese and iron oxides
Autorzy:
Irannajad, M.
Hhaghighi, H. K.
Soleimanipour, M.
Powiązania:
https://bibliotekanauki.pl/articles/110138.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption
wastewater
manganese oxide
iron oxide
zeolite
Opis:
Adsorption of copper, cadmium and zinc on manganese and iron oxide coated zeolite from aqueous solution was investigated in a batch mode. Experiments were conducted to investigate the effects of the initial concentration of metals, initial pH, contact time and temperature on the adsorption of ions. According to the results, adsorption of ions on manganese and iron oxide coated zeolite increased with the enhancement of initial Cu2+, Zn2+ and Cd2+ concentrations and contact time and also with increase of temperature. The results showed that at the beginning, the adsorption rate of Cu2+ and Cd2+ was more than 90 %. This rate continued to be slower for Zn2+ in both zeolites. Furthermore, the amount of Cu2+, Zn2+, and Cd2+ adsorption on the manganese oxide coated zeolite (qe) was equal to 14 mg/g, 9 mg/g and 16 mg/g and on the iron oxide coated zeolite it was 11 mg/g, 7 mg/g and 13mg/g, respectively. It was shown that at the concentrations below 100 mg/dm3 adsorption was rapid and almost all heavy metals were adsorbed. As a result, the significant factor affecting qe is the proportion of weight to liquid and pH in the solutions. Finally, the results showed that the adsorption of Zn2+, Cu2+ and Cd2+ onto the manganese oxide coated zeolite followed both the Langmuir and Freundlich isotherm models.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 894-908
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Thermal Properties of Europium-Cerium Oxide as a New Fluorite-Type Ceramic Material for Thermal Barrier Coatings Applications
Autorzy:
Mikuśkiewicz, M.
Stopyra, M.
Moskal, G.
Powiązania:
https://bibliotekanauki.pl/articles/352272.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
TBC
cerium oxide
europium oxide
thermal properties
Opis:
In the present paper the structure and thermal properties of europium cerium oxides were investigated. The material for the research was obtained via solid state synthesis. The initial powders: ceria CeO2 and europia Eu2O3 were mixed in 1:1 mass ratio (non-stoichiometric proportion with the excess of CeO2) and milled. The sintering process was performed using high temperature vacuum press at 1350°C. Calorimetric analysis was conducted both for initial powders and milled mixture. The structure, phase composition and thermal diffusivity of obtained material were investigated in as-sintered condition. It was revealed that the obtained material was multi-phase. Non-stoichiometric phases including Ce0.5Eu0.5O1.75 with fluorite type structure and different lattice parameters were present. Thermal diffusivity decreased in the range from 25 to 900°C from 1.49 to 0.57 mm2 /s and then increased to 0.70 mm2 /s at 1400°C.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 2089-2093
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Thermal Properties of Cerium-Dysprosium Oxide
Autorzy:
Mikuśkiewicz, M.
Stopyra, M.
Moskal, G.
Powiązania:
https://bibliotekanauki.pl/articles/356941.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cerium oxide
dysprosium oxide
hermal properties
TBC
Opis:
The paper presents results of investigation on synthesis and characterization of cerium-dysprosium oxide. The input powders - dysprosium oxide Dy,sub>2O3 and cerium oxide CeO2 - were mixed so as to obtain equimolar ratio of cations, milled in alcohol and synthesized via solid state reaction process at 1350°C under 15MPa in vacuum for 2h. The microstructure, phase composition and thermal properties were analyzed. The obtained material was multiphase. Non-stoichiometric compounds were identified. Thermal diffusivity of investigated material decreased in the temperature range of 25-1000°C from 0,71 to 0,45 mm2/s.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2B; 965-969
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and properties of the graphene layer on the copper substrate
Autorzy:
Pietrzak, K.
Olesińska, W.
Strąk, C.
Siedlec, R.
Gładki, A.
Powiązania:
https://bibliotekanauki.pl/articles/778091.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
copper
graphene
graphene oxide
reduced graphene oxide
Opis:
The aim of the work presented in the article was to clarify controversial comments about anti-corrosion and mechanical properties of graphene coatings, deposited on copper substrates. It was designed special experimental cycle comprising: preparation of graphene forms and copper, the observation of layers Cu / GO (rGO) after the thermal reduction processes and oxidative test in air at 150°C temperature and 350 h in time. The resulting coatings and graphene layers were subjected to tribological test for hardness. The observed differences in the continuity of the coverage copper surface by graphene forms, allowed to understand the macroscopic effect of increased hardness and wear resistance layers rGO/Cu.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 4; 104-108
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of Copper-based Multi-walled Carbon Nanotube Composites
Autorzy:
Domagała, K.
Borlaf, M.
Kata, D.
Graule, T.
Powiązania:
https://bibliotekanauki.pl/articles/355954.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
MWCNT
water treatment
copper
cuprous oxide
cupric oxide
Opis:
In this study, the synthesis of copper-based multi-walled carbon nanotube compositesis described. Over the last years, carbon nanotubes (CNTs) have been widely used in many scientific research fields and have found applications in several sectors, e.g. for water treatment. This work focuses on combining the exceptional characteristics of CNTs, such as high specific surface areaand antibacterial properties, with the antimicrobial / antivirus features of copper oxides. The influence of synthesis parameters and thermal treatment on the final product was studied. Copper leakage was evaluated at both pH 5 and pH 7, confirming the possibility of applying Cu-based MWCNT composites in water filtration systems.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 157-162
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Graphene oxide and green-synthesized reduced graphene oxide in chitosanbased nanocomposites
Autorzy:
Kosowska, K.
Domalik-Pyzik, P.
Chłopek, J.
Powiązania:
https://bibliotekanauki.pl/articles/284287.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
graphene oxide
reduced graphene oxide
chitosan
hydroxyapatite
biomaterial
Opis:
The first part of the paper concerns synthesis and characterization of two types of nanomaterials: graphene oxide (GO) prepared by modified Marcano method and reduced graphene oxide (rGO) synthesized using green reductant, L-ascorbic acid. Their structural properties were investigated by attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR) and X-ray diffraction (XRD). Results confirmed that L-ascorbic acid is an effective reducing agent. Intensity of the oxygen-groups decreased dramatically what resulted in reduction of the GO interlayer spacing from 0.8 nm to 0.4 nm. The second part of the research was concentrated on the properties of chitosan nanocomposites modified with GO and rGO. Films were prepared by mixing of the chitosan solution with the nanoparticles dispersion. Scanning electron microscopy (SEM) was used to investigate the microstructure of the composites surface. In addition, wettability and pore size of the freeze-dried scaffolds were evaluated. Results of the mechanical tests (increase in Young’s modulus) and structural characterization confirmed that chitosan solution and GO dispersion can be mixed homogeneously. Reduction of GO during composite synthesis resulted in better dispersion of the nanosheets what increased surface roughness, wettability and stability in distilled water, PBS and Ringer’s solution compared to composite with GO. After detailed biological examination, rGO-modified nanocomposites can be potentially applied in tissue engineering.
Źródło:
Engineering of Biomaterials; 2017, 20, 142; 11-16
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Metal Oxides as Catalysts for the Thermal Decomposition of Potassium Chlorate(VII)
Autorzy:
Wojewódka, A.
Zakusylo, R.
Kravets, V.
Romanchenko, A.
Jarosz, T.
Powiązania:
https://bibliotekanauki.pl/articles/358236.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
metal oxide catalysts
thermal decomposition
potassium perchlorate
manganese oxide
copper oxide
differential thermal analysis
Opis:
The results of studies on the thermal decomposition of potassium chlorate(VII) (PP) and the catalytic effects of copper, iron, nickel, titanium, magnesium, chromium and manganese oxides on the process are presented in this paper. The investigated oxides are ranked according to the magnitude of their catalytic effect; of these, CuO and МnО2 show the best catalytic performance. These oxides reduce the PP decomposition temperature from 919.3 K down to even 825.2 K. The share of the catalytic additive in the composition, required to achieve a desirable thermal decomposition profile, was found to be no more than 0.5 wt.%. The activation energy of the decomposition process was determined, using the modified Freeman and Carroll method for both neat PP and PP supplemented with MnO2; the addition of the catalyst produced a 48.8% decrease in the activation energy of thermal decomposition.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 2; 327-338
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody syntez i badania właściwości grafenu
Methods of synthesis and testing properties of graphene
Autorzy:
Jonik, J.
Purchała, M.
Grajek, H.
Powiązania:
https://bibliotekanauki.pl/articles/270836.pdf
Data publikacji:
2016
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
tlenek grafitu
tlenek grafenu
zredukowany tlenek grafenu
graphite oxide
graphene oxide
reduced graphene oxide
Opis:
Grafen i jego pochodne są materiałami o unikalnych właściwościach biochemicznych, elektrycznych, optycznych i mechanicznych, co wzbudza zainteresowanie w wielu ośrodkach badawczych. Z tego powodu, na podstawie dostępnej literatury, podjęliśmy próbę zestawienia i interpretacji wyników badań uprzednio wymienionych materiałów otrzymanych różnymi metodami. Analizując wyniki badań różnych materiałów grafenopodobnych, można przypuszczać, że najbardziej ekonomiczną metodą otrzymywania grafenu jest zmodyfikowana metoda Hummersa. Najlepszymi technikami pomiarowymi są spektroskopia Ramana i rentgenowska spektroskopia fotoelektronów. Obydwie techniki umożliwiają ocenę składu chemicznego badanych próbek oraz stopnia ich zdefektowania. W pracy przedstawiono również niektóre z licznych zastosowań tych materiałów oraz wnioski.
Graphene and its derivatives are the materials with unique biochemical, electric, optical and mechanical properties, which has aroused interest in many research centres. Therefore, on the basis of the accessible literature, we attempt to collate and interpret the results of the aforesaid materials obtained by different methods. Analysing the results for the different graphene-like materials one can suppose, that the most economical method of the graphene synthesis is the modified Hummers’ method. The most useful testing techniques are the Raman spectroscopy and the X-ray photoelectron spectroscopy. Both techniques enable the estimation of the chemical composition and the presence of defect structure in the materials. Some of the many applications of the materials and conclusions are also presented in our review.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2016, 21, 2; 110-117
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of a Novel Silver-Based Electrical Contact Composites and Assessment of Its Mechanical and Electrical Properties
Autorzy:
Kumar, Praveen S.
Senthil, S. M.
Parameshwaran, Rathinasamy
Rathanasamy, Rajasekar
Powiązania:
https://bibliotekanauki.pl/articles/2049131.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
silver tin oxide
electrical contact
composites
tungsten oxide
conductivity
Opis:
The electrical contactors play a crucial role in closing the circuit in many power distribution components like overhead lines, underground cables, circuit breakers, transformers, and control systems. The failure in these components mainly occurs due to the break-down of contactors due to the continuous opening and closing action of contacts. Silver (Ag)-based oxide contact materials are widely used in practice, among which silver tin oxide (AgSnO2) is most common. An attempt is made in increasing the performance of AgSnO2, by adding Tungsten Oxide (WO3) in various weight proportions, thus finding the optimal proportion of AgSnO2WO3 to have increased mechanical and electrical performances. All the composite samples are fabricated in-house using powder metallurgy process. The assessment of physical and electrical properties namely, density, hardness, porosity, and electrical conductivity, showed that 90%Ag-8.5%SnO2-1.5%WO3 composite yielded superior results. With help of morphological tests, wear characteristics are also investigated, which showed that 90%Ag-8.5%SnO2-1.5%WO2 composite has a wear coefficient of 0.000227 and a coefficient of friction of 0.174 at an optimized load of 10 N and sliding velocity of 0.5 mm/s.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 4; 1087-1094
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Co2 on the Catalytic Performance Of La2O3/CeO2 and CaO/CeO2 Catalysts in the Oxidative Coupling of Methane
Autorzy:
Litawa, B.
Michorczyk, P.
Ogonowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/779348.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
CO2 effect
OCM
lanthanum oxide
calcium oxide
ethylene
Opis:
In this work the La2O3/CeO2 (33 mol % of La) and CaO/CeO2 (33 mol % of Ca) catalysts were prepared by the impregnation method and characterized by XRD and CO2-TPD. The catalytic properties of the catalysts were tested in the OCM process at 1073 K using the methane/oxygen mixture of the mole ratio 3.7 or 2.5 additionally containing CO2 and helium balance. It was found that in the presence of both catalysts an addition of CO2 enhances the selectivity to the ethylene and ethane and it does not have Any negative infl uence on methane conversion. In the case of the CaO/CeO2 catalyst the promoting effect of CO2 was the highest. When the partial pressure of CO2 equals to 39 kPa the increase in selectivity from 36 to 41% was noted while the conversion of methane equal to 19.4-19.7 %.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 1; 22-26
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Rhenium Addition on Microstructures and Mechanical Properties of Oxide Dispersion Strengthened Ferrtic Steels
Autorzy:
Noh, Sanghoon
Kang, Suk Hoon
Kim, Tae Kyu
Powiązania:
https://bibliotekanauki.pl/articles/354176.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
oxide dispersion strengthened steel
rhenium
oxide particles
tensile
creep
Opis:
In this study, to investigate effects of rhenium addition on the microstructures and mechanical properties, 15Cr-1Mo ODS ferritic steels with rhenium additions were fabricated by the mechanical alloying, hot isostatic pressing, and hot rolling processes. Unremarkable differences on grain morphologies and nano-oxide distributions were estimated in the microstructure observations. However, the ODS ferritic steels with 0.5 wt.% rhenium showed higher tensile and creep strengths at elevated temperature than that without rhenium. It was found that rhenium is very effective to improve the mechanical properties.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 4; 1261-1264
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructures and Mechanical Properties of ODS Ferritic Stainless Steels for High Temperature Service Applications
Autorzy:
Noh, Sanghoon
Kang, Suk Hoon
Kim, Tae Kyu
Powiązania:
https://bibliotekanauki.pl/articles/355864.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
stainless steel
oxide dispersion strengthening
oxide particles
tensile strength
Opis:
In this study, ODS ferritic stainless steels were fabricated using a commercial alloy powder, and their microstructures and mechanical properties were studied to develop the advanced structural materials for high temperature service applications. Mechanical alloying and uniaxial hot pressing processes were employed to produce the ODS ferritic stainless steels. It was revealed that oxide particles in the ODS stainless steels were composed of Y-Si-O, Y-Ti-Si-O, and Y-Hf-Si-O complex oxides were observed depending on minor alloying elements, Ti and Hf. The ODS ferritic stainless steel with a Hf addition presented ultra-fine grains with uniform distributions of fine complex oxide particles which located in grains and on the grain boundaries. These favorable microstructures led to superior tensile properties than commercial stainless steel and ODS ferritic steel with Ti addition at elevated temperature.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 3; 921-924
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface oxide layers with an increased carbon content for applications in oil-less tribological systems
Autorzy:
Kmita, T.
Bara, M.
Powiązania:
https://bibliotekanauki.pl/articles/185636.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tribologia
surface oxide layer
composite surface oxide layer
tribology
Opis:
The paper presents the properties of surface oxide layers with an increased content of carbon for tribological applications. The composite surface oxide layers were produced using a two-step technology through hard anodising of the surface of an aluminium alloy, followed by thermochemical treatment of anodic oxide coatings. The surface oxide layers were subjected to tribological tests in an oil-less sliding couple with T5W plastic. The presented test results confirm the usefulness of the proposed modifications of surface oxide layers for the purpose of enhancing the operational durability of oil-less sliding couples in a reciprocating motion.
Źródło:
Chemical and Process Engineering; 2012, 33, 3; 479-486
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composition and Optical Dispersion Characterization of Nanoparticles ZnO-NiO Thin Films: Effect of Annealing Temperature
Autorzy:
Oboudi, S.F.
Habubi, N.F.
Mohamed, G.H.
Chiad, S.S.
Powiązania:
https://bibliotekanauki.pl/articles/412573.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
TCOs
Dispersion parameters
Thermal evaporation
zinc oxide
Nickel Oxide
Opis:
Thin films of ZnO0.7NiO0.3 have deposited on glass substrates at room temperature by using thermal evaporation technique under vacuum 10-5 mbar. The optical properties and dispersion parameters of the films have been studied. Changes in direct optical energy band gap of films were confirmed before and after annealing. The optical energy gap Eg decreased from 3.11 to 2.86 eV with increasing of annealing temperature to 200 ºC. Some of the optical absorption parameters, such as optical dispersion energies Eo and Ed, Urbach tails EU , dielectric constant ε, the average values of oscillator strength So, and wavelength of single oscillator λo have been reported. An increase in the annealing temperature causes an increase in the average oscillator strength from 62.02 to 87.71 eV.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 8, 1; 78-86
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of graphene oxide and reduced graphene oxide with inorganic nanoparticles
Autorzy:
Jagiełło, J.
Baran, M.
Lipińska, L.
Powiązania:
https://bibliotekanauki.pl/articles/284372.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
graphene
oxide
nanoparticles
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 50
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie wpływu wybranych tlenków metali na możliwość modyfikacji barwy ceramicznej farby purpurowej
Examination of selected metal oxides’ effect on the possibility of modifying the color of purple ceramic paint
Autorzy:
Karaś, A.
Chmielewska, D.
Synowiec, B.
Powiązania:
https://bibliotekanauki.pl/articles/168772.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Ceramiki i Materiałów Budowlanych
Tematy:
purpura Kasjusza
ceramiczna farba purpurowa
barwa
tlenek srebra
tlenek chromu
tlenek miedzi
tlenek indu
tlenek itru
tlenek kobaltu
Purple of Cassius
ceramic purple colour
colour
silver oxide
chromium oxide
cupric oxide
indium oxide
yttrium oxide
cobalt oxide
Opis:
Ceramiczna farba purpurowa składa się z pigmentu nieorganicznego Purpury Kasjusza i odpowiednio dobranego topnika. Farba znajduje szerokie zastosowanie w zdobieniu porcelany zarówno w technice malarskiej, jak i w technice sitodruku pośredniego (kalki ceramicznej). Przeprowadzone badania miały na celu ustalenie wpływu domieszek tlenków metali na możliwość uzyskiwania różnych odcieni barwy purpurowej i fioletowej. Do ceramicznej farby purpurowej na bazie bezołowiowego topnika, na różnych etapach jej wytwarzania, dodawano następujące tlenki metali: tlenek srebra Ag2O, tlenek chromu Cr2O3, tlenek miedzi CuO, tlenek indu In2O3, tlenek itru Y2O3, tlenek kobaltu Co3O4 i określano parametry barwy L*a*b* uzyskanych farb w stosunku do farby wzorcowej, bez żadnych dodatków. W wyniku przeprowadzonych badań wykazano, że stosując domieszkowanie tlenkami metali na różnych etapach wytwarzania farby purpurowej, można uzyskać różne odcienie purpury i fioletu, a przy modyfikacji barwy farby ważny jest również etap dodawania domieszek.
Ceramic purple colour consists of Purple of Cassius inorganic pigment and properly chosen flux. The colour is widely used for decoration of porcelain both in painting technique as well as in technique of indirect screen printing (decal). The aim of the carried out tests was to settle influence of metal oxides’ admixtures upon possibility of obtaining various shades of purple and violet colour. The following metal oxides were being added to the ceramic purple colour on the base of its leadless flux, at various stages of its manufacturing: silver oxide Ag2O, chromium oxide Cr2O3, cupric oxide CuO, indium oxide In2O3, yttrium oxide Y2O3, cobaltic oxide Co3O4 and parameters of colour L*a*b* of the obtained colours were defined comparing to the pattern colour, without any admixtures. As the result of the carried out tests it was shown, that performing admixtures of metal oxide at different stages of purple colour’s manufacturing, various shades of purple and violet can be obtained, and during modification of colour the stage of admixtures’ addition is important as well.
Źródło:
Szkło i Ceramika; 2016, R. 67, nr 6, 6; 15-18
0039-8144
Pojawia się w:
Szkło i Ceramika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anode Modification with Reduced Graphene Oxide–Iron Oxide Improves Electricity Generation in Microbial Fuel Cell
Autorzy:
Nosek, Dawid
Cydzik-Kwiatkowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2202130.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
MFC
reduced graphene oxide
iron(III) oxide
electricity generation
wastewater
Opis:
In recent years, much research has focused on energy recovery from biomass as an alternative to fossil fuel usage. Microbial fuel cells (MFCs), which produce electricity via microbial decomposition of organic matter, are of great interest. The performance of an MFC depends on the electrode material; most often, carbon materials with good electrical conductivity and durability are used. To increase the power output of an MFC, the anode material can be modified to reduce the internal resistance and increase the anode surface area. Therefore, this study determined how modifying a carbon felt anode with reduced graphene oxide (rGO) and a combination of rGO with iron (III) oxide (rGO-Fe) affected electricity generation in an MFC fueled with wastewater. A mixed microbial consortium was used as the anode biocatalyst. The MFC-rGO-Fe produced significantly higher voltages than other cells (average 109.4 ± 75.1 mV in the cycle). Power density curves indicated that modifying the anode with rGO-Fe increased the power of the MFC to 4.5 mW/m2, 9.3- and 3.9-times higher than that of the control MFC and the MFC-rGO, respectively. Anode modification reduced the internal resistance of the cells from 1029 Ω in the control MFC to 370 and 290 Ω in the MFC-rGO and MFC-rGO-Fe, respectively. These results show that a mixture of rGO with iron (III) oxide positively affects electricity production and can be successfully used for anode modification in the MFCs fueled with wastewater.
Źródło:
Journal of Ecological Engineering; 2022, 23, 10; 147--153
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Properties of Nanocomposite Nickel/Graphene Oxide Coatings Produced by Electrochemical Reduction Method
Autorzy:
Cieślak, G.
Trzaska, M.
Powiązania:
https://bibliotekanauki.pl/articles/354431.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
graphene oxide
nanocomposites
electrodeposition
nickel/graphene oxide coatings
corrosion tests
Opis:
The paper presents the results of research on nanocomposite nickel/graphene oxide (Ni/GO) coatings produced by electrochemical reduction method on a steel substrate. Discussed is the method of manufacturing composite coatings with nickel matrix and embedded graphene oxide flakes. For comparative purposes, the studies also included a nanocrystalline Ni coating without embedded graphene oxide flakes. Graphene oxide was characterized by Raman spectroscopy, infrared spectroscopy (FTIR) and transmission (TEM) and scanning (SEM) electron microscopy. Results of studies on the structure of nickel and composite Ni/GO coatings deposited in a bath containing different amount of graphene oxide are presented. The coatings were characterized by scanning electron microscopy, light microscopy, Raman spectroscopy and X-ray diffraction. The adhesion of the prepared coatings to the substrate was examined by the scratch method. The microhardness of the coatings was measured using the Vickers method on perpendicular cross-sections to the surface. Corrosion tests of the coatings were investigated using the potentiodynamic method. The influence of graphene oxide on the structure and properties of composite coatings deposited from baths with different content of graphene oxide was determined.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 4; 1479-1486
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the influence of parameters on hexafluoropropylene oxide oligomerization in the presence of complex amines
Autorzy:
Meissner, E.
Wróblewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/777883.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
tlenek heksafluoropropylenu
oligomery tlenku heksafluoropropylenu
hexafluoropropylene oxide
oligomers of hexafluoropropylene oxide
Opis:
Oligomers of hexafluoropropylene oxide were tested as potential materials for obtaining various compounds with unique properties, of which most important are chemical and thermal resistance. Two basic parameters influence the oligomerization process of hexafluoropropylene oxide: the type of the catalyst and the type of the solvent. Other parameters such as temperature and pressure have significantly less influence. The influence of tertiary amines as catalyst, the type of the solvent, temperature, pressure and catalyst concentration were tested in the process of hexafluoropropylene oxide oligomerization.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 3; 98-100
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of nitric oxide on boar sperm motility, membrane integrity, and acrosomal status during semen storage
Autorzy:
Jovicić, M.
Pintus, E.
Fenclova, T.
Simonik, O.
Chmelikova, E.
Ros-Santaella, J. L.
Sedmikova, M.
Powiązania:
https://bibliotekanauki.pl/articles/2087766.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
boar spermatozoa
nitric oxide
nitric oxide synthases
NO donor
NOS inhibitor
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 1; 73-82
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Surfactant Types on the Size of Tin Oxide Nanoparticles
Autorzy:
Boran, F.
Çetinkaya, S.
Şahin, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031632.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
nanoparticle
tin oxide
surfactant
Opis:
In this study, tin oxide (SnO₂) nanoparticles were synthesized by hydrothermal method in the presence of hydrazine and ammonia by adding surfactant for 12 h in a Teflon autoclave at 100°C reaction temperature. Tin(II) chloride hydrate as an inorganic precursor, hexadecyl trimethyl ammonium bromide (CTAB), and tetrapropyl ammonium bromide (TPAB) as cationic, and sodium dodecyl sulfonate (SDS) as anionic surfactants were used. The results showed that the size and shape of nanoparticles depended on the surfactant types. The nanoparticles sizes between 17.5 and 19.7 nm were obtained by changing types of surfactants. Synthesized tin oxide nanoparticles were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and the Fourier transform infrared spectroscopy.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 546-548
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of functionalized graphene oxide coatings on gold
Autorzy:
Trzaskowski, M.
Ciach, T.
Powiązania:
https://bibliotekanauki.pl/articles/285667.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
gold
coatings
graphene oxide
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 88
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applications of flake graphene in tissue engineering
Autorzy:
Lipińska, L.
Jagiełło, J.
Baran, M.
Kurp, K.
Powiązania:
https://bibliotekanauki.pl/articles/285746.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
graphene
tissue engineering
oxide
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 51
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composite coatings of polylactide with graphene oxide and hydroxyapatite on titanium
Autorzy:
Torcuato, M. S.
Szaraniec, B.
Kąc, S.
Chłopek, J.
Powiązania:
https://bibliotekanauki.pl/articles/284150.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
coatings
graphene oxide
hydroxyapatite
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 116
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A successful operational initiative in copper oxide flotation: Sequential sulphidisation-flotation technique
Autorzy:
Asadi, Moharram
Soltani, Faraz
Mohammadi, Mohammad Reza Tavakoli
Khodadadi, Darban Ahmad
Abdollahy, Mahmoud
Powiązania:
https://bibliotekanauki.pl/articles/110770.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
copper oxide
sulphidisation
flotation
Opis:
One of the main challenges in the copper oxide processing industry is implementation of a flotation method to reduce operating costs. Sulphidising flotation is the most common used technique in which a sulphidisation agent is used to sulphidise the surface of the oxide minerals. In this research, the mentioned technique was used sequentially for the concentration of silicate-carbonate ore containing 3.1% Cu (malachite). The presence of 39% Cu in -38 μm size fraction (fine particles) of feed led to poor grades and recoveries in the initial tests. The addition of sodium sulfide and subsequent flotation at three sequential stages was identified as a successful operational initiative to solve this problem in the following tests. The dosages of 1500, 1567 and 100 g/Mg of sodium silicate, sodium sulfide and potassium amyl xanthate, respectively, the conditioning time of 5 min for sulphidisation and pH=9.72 were chosen as optimum operational conditions using central composite design (CCD) method of experiments design. The rougher concentrate with 9.28% grade and 81.15% recovery was obtained under these conditions. The grade of obtained concentrate was reached to 24% in the cleaner step. The total recovery of both steps was over 74%.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 2; 356-369
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oligomerization of hexafluoropropylene oxide in the presence of alkali metal halides
Autorzy:
Meissner, E.
Wróblewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/777879.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
tlenek heksafluoropropylenu
oligomeryzacja
oligomery tlenku heksafluoropropylenu
heksafluoropropylene oxide
oligomers of hexafluoropropylene oxide
Opis:
Oligomers of hexafluoropropylene oxide are raw materials for the synthesis of compounds having unique properties such as high chemical and thermal resistance. Two basic parameters have influence on the process of hexafluoropropylene oxide oligomerization: the kind of the catalyst and the solvent. The temperature and pressure influence this process to a lesser extent. The influence of halide ions, the solvent and the temperature on the oligomerization of hexafluoropropylene oxide has been studied.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 3; 95-97
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of oligochitosans on expression of inos gene in ehrlich ascites tumour in vitro
Autorzy:
Ignacak, Jan
Wiśniewska-Wrona, Maria
Dulińska-Litewka, Joanna
Pałka, Iwona
Zagajewski, Jacek
Niekraszewicz, Antoni
Powiązania:
https://bibliotekanauki.pl/articles/1035407.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
chitosan oligomers
histone H1
iNOS (inducible nitric oxide synthase)
nitric oxide
Opis:
Oligochitosans obtained through degradation of macromolecules of chitosan with a high degree of deacetylation turned out to be biologically active, contributing to an increase of nitric oxide levels in Ehrlich ascites tumor (EAT) cells through inducing expression of the isoform of inducible nitric oxide synthase (iNOS) gene. An increase of NO levels in EAT cells in the presence of the investigated oligochitosans might contribute to nitrosylation of L-cysteine – an allosteric effector of the M2 isoenzyme of pyruvate kinase (PK), which switches the PK kinase activity, responsible for ATP synthesis, to the histone kinase activity that may participate in histone H1 phosphorylation. Lack of the histone activity of the PK M2 isoenzyme may contribute to decreased histone H1 phosphorylation and thus inhibit EAT cells proliferation.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2012, 17; 141-148
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructures and Tensile Properties of Fe-Cr-Al Oxide Dispersion Strengthened Ferritic Alloys for High Temperature Service Components
Autorzy:
Park, Minha
Bae, Jaeyoon
Kim, Byung-Jun
Kim, Bu-Ahn
Noh, Sanghoon
Powiązania:
https://bibliotekanauki.pl/articles/2203715.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Fe-Cr-Al
ferritic alloy
oxide dispersion strengthening
complex oxide
tensile strength
Opis:
In present study, Fe-22Cr-4.5Al oxide dispersion strengthened ferritic alloys were fabricated using a pre-alloyed powder with different minor alloying elements, and their microstructures and tensile properties were investigated to develop the advanced structural materials for high temperature service components. Planetary-typed mechanical alloying and uniaxial hot pressing processes were employed to fabricate the Fe-Cr-Al oxide dispersion strengthened ferritic alloys. Microstructural observation revealed that oxide dispersion strengthened ferritic alloys with Ti, Zr additions presented extremely fine micro-grains with a high number density of nano-scaled oxide particles which uniformly distributed in micro-grains and on the grain boundaries. These oxide particles were confirmed as a fine complex oxide, Y2Zr2O7. These favorable microstructures led to superior tensile properties than commercial ferritic stainless steel and oxide dispersion strengthened ferritic alloy with only Ti addition at elevated temperature.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 1; 85--88
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of physicochemical properties of graphite oxide and thermally exfoliated/reduced graphene oxide
Autorzy:
Drewniak, S. E.
Pustelny, T. P.
Muzyka, R.
Plis, A.
Powiązania:
https://bibliotekanauki.pl/articles/779581.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
graphite oxide
thermally exfoliated/reduced graphene oxide
topography investigations
Raman spectroscopy
elemental analysis
Opis:
The aim of the experimental research studies was to determine some electrical properties of graphite oxide and thermally exfoliated/reduced graphene oxide. The authors tried to interpret the obtained physicochemical results. For that purpose, both resistance measurements and investigation studies were carried out in order to characterize the samples. The resistance was measured at various temperatures in the course of composition changes of gas atmospheres (which surround the samples). The studies were also supported by such methods as: scanning electron microscopy (SEM), Raman spectroscopy (RS), atomic force microscopy (AFM) and thermogravimetry (TG). Moreover, during the experiments also the elemental analyses (EA) of the tested samples (graphite oxide and thermally exfoliated/reduced graphene oxide) were performed.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 4; 109-114
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of chemical and phase composition of copper oxide prepared by direct current sputtering for photovoltaic applications
Autorzy:
Sawicka-Chudy, P.
Wielgosz, M.
Wal, A.
Cieniek, B.
Wisz, G.
Głowa, Ł.
Cholewa, M.
Sawicka, J.
Powiązania:
https://bibliotekanauki.pl/articles/101735.pdf
Data publikacji:
2018
Wydawca:
Instytut Polityki Energetycznej im. Ignacego Łukasiewicza
Tematy:
XRF
XRD
copper oxide
photovoltaics
Opis:
This paper presents the application of X-ray fluorescence and X-ray diffraction methods for the study of copper oxide structures as an absorber layer in thin-film solar cells. The layers of copper oxide were applied by direct current magnetron sputtering. Quantitative and qualitative analysis of oxide layers were performed using XRF (X-ray fluorescence). The studies showed a high copper content in both samples, amounting to 98% and 96%, as well as trace amounts of other elements (nickel, lead). The XRD (X-ray diffraction) study showed Cu20 and Cu8O phases, amorphism ranging from 24% to 44%, and crystallinity from 55% to 75%. Crystallites of 30 nm were also determined. The aim of the study was to determine the chemical and phase composition of the layers obtained and to determine the degree of their contamination depending on the parameters of the manufacturing technology in terms of their application in photovoltaics. One of the samples showed an advantage both in terms of material and structural composition.
Źródło:
Energy Policy Studies; 2018, 1 (2); 3-11
2545-0859
Pojawia się w:
Energy Policy Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Graphene and graphene oxide in the oil and gas industry
Autorzy:
Jamrozik, A.
Powiązania:
https://bibliotekanauki.pl/articles/299253.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
drilling
nanotechnologies
graphene
graphene oxide
Opis:
Presently, nanotechnology and nanomaterials have found a number of applications in drilling, exploration and production (E&P) works, as well as in the area of refinery and distribution of crude oil and natural gas. Nanomaterials enjoy considerable popularity owing to their new and unique features which differentiate them from classical materials. Graphene is a relatively new material. Currently it occupies the seventh position among the most commonly used nanomaterials in oil and gas industry. This paper presents the properties graphene and graphene oxide and gives an insight into the applicability of graphene and graphene oxide in the oil and gas industry.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 3; 731-744
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cytotoxic effect of nitric oxide on human hematological malignant cells.
Autorzy:
Tsumori, Michihiro
Tanaka, Junko
Koshimura, Kunio
Kawaguchi, Mikiko
Murakami, Yoshio
Kato, Yuzuru
Powiązania:
https://bibliotekanauki.pl/articles/1043819.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
lymphoma
myeloma
leukemia
nitric oxide
Opis:
We investigated the cytotoxic effect of nitric oxide (NO) on primary culture of human hematological malignant cells. Sodium nitroprusside (SNP), an NO donor, had cytotoxic effects on the cells of some patients with malignant lymphoma (ML), acute myelocytic leukemia (AML) or chronic myelomonocytic leukemia (CMMoL), but not with multiple myeloma. Cultured cells from the ML patient remained sensitive to SNP after the cells became resistant to anti-cancer drugs. In contrast, the cells from the patients with AML and CMMoL became resistant to SNP while anti-cancer drugs remained effective. In samples of the cells of the patients with ML and AML, the number of CD3 positive lymphoma cell was decreased by SNP and the number of CD33 negative cells and normal B lymphocytes (CD19 positive cells) were increased. In the cells of the patient with ML, apoptosis was induced by SNP. SNP had no effect on lymphocytes of healthy volunteers. These results suggest that SNP had an anti-tumor effect on human hematological malignant cells.
Źródło:
Acta Biochimica Polonica; 2002, 49, 1; 139-144
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superparamagnetic iron oxide nanoparticles as versatile drug delivery carriers
Autorzy:
Reczyńska, K.
Marszałek, M.
Zarzycki, A.
Reczyński, W.
Chrzanowski, W.
Pamuła, E.
Powiązania:
https://bibliotekanauki.pl/articles/284204.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanoparticles
iron oxide
silica coating
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 104
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A narrative review on inhaled nitric oxide to treat Coronavirus Disease 2019.
Autorzy:
Romanelli, Antonio
De Rosa, Rosanna Carmela
Powiązania:
https://bibliotekanauki.pl/articles/2054912.pdf
Data publikacji:
2022-06-30
Wydawca:
Towarzystwo Pomocy Doraźnej
Tematy:
COVID-19
cARDS
nitric oxide
Opis:
COVID-19-associated ARDS (cARDS) results from multiple pathogenetic mechanisms involving both parenchyma and circulation of the lungs. Despite authors described two pneumonia phenotypes according to lung elastance values, reported as Low and High phenotype, the evidence suggests that patients with cARDS have similar respiratory mechanics to patients with ARDS from other causes. Consequently, the proper management of patients with cARDS is the same as ARDS,consisting of protective mechanical ventilation strategy and prone position ventilation.However, the hypothesis that impaired alveolar perfusion could have a role in cARDS is interesting. Nitric oxide (NO) is a biatomic gaseous moleculeables to induce smooth muscle relaxation and vasodilation. So, inhaled nitric oxide (iNO) acts as a selective vasodilator because it only dilates vessels in areas participating in gas exchange, preserving hypoxic pulmonary vasoconstriction reflex and reducing ventilation/perfusion mismatch. With this narrative review we summarised the role of iNO for cARDS treatment to improve gas exchange. Furthermore, we briefly described its activity as an antiviral agent. In conclusion, although iNO administration can represent a valid theoretical therapeutic choice for the treatment of severe unresponsive hypoxemia in COVID-19 patients, data presented in the literature are scares and inconclusive, and several clinical trials are still ongoing. Further studies are needed to elucidate the pathogenetic mechanism of respiratory failure related to SARS-CoV-2 infection and inhaled NO role in patients with severe disease.
Źródło:
Critical Care Innovations; 2022, 5, 2; 40-50
2545-2533
Pojawia się w:
Critical Care Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chitosan-based nanocomposites modified with reduced graphene oxide prepared via green synthesis
Autorzy:
Kosowska, K.
Domalik-Pyzik, P.
Jagiełło, J.
Lipińska, L.
Chłopek, J.
Powiązania:
https://bibliotekanauki.pl/articles/284680.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
graphene oxide
green synthesis
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 59
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Receiver operating characteristic analysis of the FeNO biomarker in the diagnosis of asthma
Autorzy:
Biesiadecki, Marek
Galiniak, Sabina
Bartusik-Aebisher, Dorota
Aebisher, David
Powiązania:
https://bibliotekanauki.pl/articles/454725.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
asthma
nitric oxide
ROC curve
Opis:
Introduction. The fraction of exhaled nitric oxide (FeNO) is used as a non-invasive biomarker that reflects inflammation in the airways. It is so versatile that it used to control asthma severity as well as to monitor response to treatment. However, the exact cut-off point of the nitric oxide level which allows one to make a precise diagnosis of asthma is unclear. Aim. To examine the possibility of using advanced statistical methods such as receiver operating characteristic for the analysis of FeNO concentrations for improving the diagnosis of asthma. Materials and methods. Receiver operating characteristic (ROC) was used for analyzing results to determine levels of nitric oxide which may be a prognostic indicator of asthma. The studied group consisted of 111 children including 69 asthmatic patients, and 42 age- and sex-matched healthy subjects. Measurement of exhaled nitric oxide was conducted in all subjects included in this study. Results. FeNO level was higher in asthmatic patients. The analysis of results showed that the cut-off point for the FeNO concentration is 11.5 ppb. Sensitivity and specificity with the FeNO level allowed us to determine a value of the diagnostic variable of FeNO concentration of 14.0 ppb. A comparison of FeNO level and sex of the subjects showed there is no correlation between these parameters of patients. Conclusions. Currently, the FeNO measurement provides complementary d
Źródło:
European Journal of Clinical and Experimental Medicine; 2018, 4; 253-258
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Histochemical study of the nitric oxide synthase activity in experimental trichinellosis
Autorzy:
Hadas, E.
Gustowska, L.
Boczon, K.
Janczewska, D.
Powiązania:
https://bibliotekanauki.pl/articles/837102.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
nitric oxide synthase
mouse
mice
trichinellosis
enzyme
nitric oxide
Trichinella spiralis
synthase activity
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
About the Optimal Ratio Inhibitor and Activators of Carbon Dioxide Sorption Process by Using Chlorophyll-synthesizing Chlorella microalgae
Autorzy:
Dyachok, Vasil
Mandryk, Solomiia
Huhlych, Serhiy
Powiązania:
https://bibliotekanauki.pl/articles/1838425.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Chlorella microalgae
carbon dioxide
phosphorus oxide
nitrogen oxide
sulfur dioxide
inhibitor
activator
mathematical description
Opis:
The suppression of the inhibition effect by SO2 sulfur dioxide with the simultaneous action of two activators – P2O5 phosphorus oxide and NxOy nitrogen oxide, as well as the process of carbon dioxide absorption by chlorophyll-synthesizing microalgae Chlorella were studied in this work. The experimental dependences of the СО2 uptake dynamics by microalgae under the conditions of the SO2 inhibitor critical concentration action and the simultaneous presence of P2O5 and NxOy activators were shown. A mathematical description of the Chlorella microalgae biomass growth depending on the P2O5 and NxOy activators concentration, provided that there is a SO2 inhibitor constant concentration was obtained. The optimum values of the P2O5 phosphorus oxide and NxOy nitrogen oxides concentration at the SO2 inhibitor critical concentration for the carbon dioxide absorption by chlorophyll-synthesizing microalgae Chlorella process were established.
Źródło:
Journal of Ecological Engineering; 2021, 22, 5; 26-31
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Recovery of Lithium and Ni/Co oxide from Cathode Active Powder of End-of-Life NCA(LiNiCoAlO2) Battery
Autorzy:
Shin, Shun-Myung
Shin, Dong-Ju
Joo, Sung-Ho
Wang, Jei-Pil
Powiązania:
https://bibliotekanauki.pl/articles/352178.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cathode active powder
NCA(LiNiCoAlO2)
Li2CO3
nickel oxide
cobalt oxide
Opis:
This study was attempted to study for recovery of Li as Li2CO3 from cathode active material, especially NCA (LiNiCoAlO2), recovered from spent lithium ion batteries. This consists of two major processes, carbonation using CO2 and water leaching. Carbonation using CO2 was performed at 600ºC, 700ºC and 800ºC, and NCA (LiNiCoAlO2) was phase-separated into Li2CO3, NiO and CoO. The water leaching process using the differences in solubility was performed to obtain the optimum conditions by using the washing time and the ratio of the sample to the distilled water as variables. As a result, NCA (LiNiCoAlO2) was phase-separated into Li2CO3 and NiO, CoO at 700ºC, and Li2CO3 in water was recovered through vacuum filtration after 1 hour at a 1:30 weight ratio of the powder and distilled water. Finally, Li2CO3 containing Li of more than 98 wt.% was recovered.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 481-485
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joining Of Green Body And Dense Substrate For Indium Tin Oxide Under Uniaxial Pressure In An Open Condition
Łączenie zielonej masy i gęstego podłoża z tlenku cyny indu w warunkach jednoosiowego ściskania w stanie otwartym
Autorzy:
Moon, G.-S.
Chung, T.-J.
Yang, S. H.
Hong, G.-S.
Oh, K.-S.
Powiązania:
https://bibliotekanauki.pl/articles/355654.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transparent conducting oxide
indium tin oxide
green body
joining
tlenek indu
zielona masa
łączenie
Opis:
The green body and dense substrate of indium tin oxide was joined by uniaxially pressing at 0.3 MPa at 1300°C to test the restoring of the eroded part of transparent conducting oxide target. The green body was sintered to 98% of theoretical density under the suppression of shrinkage along the boundary below 5%. The boundary between two parts was free of pore but could be recognized from the difference in grain sizes. The joined part had the virtually same density with the substrate, but the grain size was less than one fifth compared with that of substrate.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 2B; 1209-1212
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Allelic polymorphism of endothelial NO-synthase gene and its functional manifestations
Autorzy:
Dosenko, Victor
Zagoriy, Vyacheslav
Haytovich, Nikolay
Gordok, Olga
Moibenko, Alexey
Powiązania:
https://bibliotekanauki.pl/articles/1041240.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
activity of nitric oxide synthase
endothelial nitric oxide synthase
RNA expression
platelets
allelic polymorphism
Opis:
Investigation of the mechanisms of phenotypic realization of allelic polymorphism of the eNOS gene has shown that the level of eNOS mRNA and activity of this enzyme in platelets depends from genotype. We identified a T-786→C polymorphism in the promoter region, a variable number of tandem repeats (4a/4b) in intron 4 and the G894→T polymorphism in exon 7 of the eNOS gene in isolated human platelets. We measured eNOS mRNA in isolated platelets by reverse transcription-PCR and eNOS enzyme activity by fluorimetric detection system FCANOS-1 using diaminofluorescein diacetate (DAF-2A). It was shown that the level of eNOS mRNA is the lowest for the -786C/C promoter genotype. In exon 7 homozygotes (894T/T) the level of RNA is lower than in normal homozygotes (894G/G), but higher than in heterozygotes (894G/T). The eNOS activity in platelets is lower in carriers of the 786C/C promoter genotype than in normal homozygotes (2.1 × P=0.03), and lower comparing to heterozygotes (2.9 × P>0.05). The eNOS activity accompanying the 894T/T variant of exon 7 is also lower than in normal homozygotes (P>0.05). Regarding the polymorphism in intron 4 - the enzyme's activity is lower in carriers of the 4a/4a genotype comparing to normal homozygotes (1.7 × P>0.05) and lower than in heterozygotes (1.9 × P>0.05). These results allow one to conclude that the T-786→C polymorphism of the eNOS gene promoter most significantly affects the gene expression and eNOS activity.
Źródło:
Acta Biochimica Polonica; 2006, 53, 2; 299-302
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An application of butanol as a diesel fuel component and its influence on exhaust emissions
Autorzy:
Kozak, M.
Powiązania:
https://bibliotekanauki.pl/articles/792035.pdf
Data publikacji:
2011
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
diesel engine
exhaust emission
diesel fuel
n-butanol
smoke emission
oxygenation
nitric oxide
carbon oxide
Opis:
The influence of oxygenated diesel fuel containing n-butanol on a passenger car exhaust emissions was tested over the NEDC transient cycle. The tests showed that a diesel fuel/butanol blend, containing 10% of n-butanol, caused a significant decrease in PM and smoke emissions, had no effect on NOx and CO2 emissions and brought about higher CO and HC emissions. The most favourable fact resulting from the butanol application as diesel fuel component is that it produces desirable changes in PM/NOx trade-off.
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2011, 11C
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth Temperature Effect of Atomic-Layer-Deposited GdOx Films
Autorzy:
Ryu, Sung Yeon
Yun, Hee Ju
Lee, Min Hwan
Choi, Byung Joon
Powiązania:
https://bibliotekanauki.pl/articles/2049285.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gadolinium oxide
Gd2O3
rare-earth oxide
atomic layer deposition
hydrophobicity
electrical property
Opis:
Gadolinium oxide (Gd2O3) is one of the lanthanide rare-earth oxides, which has been extensively studied due to its versatile functionalities, such as a high permittivity, reactivity with moisture, and ionic conductivity, etc. In this work, GdOx thin film was grown by atomic layer deposition using cyclopentadienyl (Cp)-based Gd precursor and water. As-grown GdOx film was amorphous and had a sub-stoichiometric (x ~ 1.2) composition with a uniform elemental depth profile. ~3 nm-thick GdOx thin film could modify the hydrophilic Si substrate into hydrophobic surface with water wetting angle of 70°. Wetting and electrical test revealed that the growth temperature affects the hydrophobicity and electrical strength of the as-grown GdOx film.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 755-758
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gas Transmitters (CO and NO) as Factors Regulating the Skin Cells Functions
Autorzy:
KOZIOROWSKA, ANNA
ROMEROWICZ-MISIELAK, MARIA
Powiązania:
https://bibliotekanauki.pl/articles/455157.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski
Tematy:
Cells viability
Carbon monoxide
Nitric oxide
Opis:
The paper presents the results of research conducted on cells isolated from the epidermal layer of the skin taken from the ear of domestic swine (Sus scrofa). It was checked whether the increase in the concentration of carbon monoxide (CO) in cell culture, cause changes in their viability, and will affect the changes in the production of nitric oxide. For evaluation of the viability of cells, the MTT assay was used. The concentration of a nitric oxide metabolites (NO3/NO2), in the cell supernatants was measured using test-Measure iT High-Sensitivity Nitrite Assay Kit.
Źródło:
Edukacja-Technika-Informatyka; 2017, 8, 1; 131-136
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ZnO dla fotowoltaiki
ZnO for Photovoltaics
Autorzy:
Godlewski, M.
Łuka, G.
Pietruszka, R.
Wachnicki, Ł.
Witkowski, B.
Powiązania:
https://bibliotekanauki.pl/articles/159146.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
Tematy:
fotowoltaika
tlenek cynku
photovoltaics
zinc oxide
Opis:
Mimo znaczącej redukcji kosztów paneli fotowoltaicznych (PV), cena energii wytwarzanej przez baterie słoneczne ciągle jest za wysoka. Możliwe są dwie strategie rozwiązania tej sytuacji – (a) podniesienie wydajności konwersji światła w komórkach fotowoltaicznych lub/i (b) obniżenie kosztów paneli PV poprzez zastosowanie tańszych materiałów lub technologii. W referacie omówione są prace mające na celu: (a) zastąpienie zbyt drogiego ITO warstwami ZnO o przewodnictwie metalicznym, (b) uproszczenie konstrukcji komórek PV oraz (c) znalezienie alternatywnych materiałów.
Despite of a large reductions of costs energy produced by solar panels is still too expensive. There are two approaches to change this situation: by (a) increase of device output and/or (b) reduction of device costs by use of cheaper alternative materials. In this article we discuss the latter approach – (a) replacement of ITO by ZnO with metallic conductivity, (b) change of device architecture, and (c) use of alternative materials.
Źródło:
Prace Instytutu Elektrotechniki; 2014, 264; 5-13
0032-6216
Pojawia się w:
Prace Instytutu Elektrotechniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, Characterization and Sensing Behavior of WO₃ Nanocrystalline Powder for Toluene Vapor
Autorzy:
Boran, F.
Çetinkaya, S.
Powiązania:
https://bibliotekanauki.pl/articles/1031559.pdf
Data publikacji:
2017-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
tungsten oxide
direct precipitation technique
toluene
Opis:
Tungsten oxide (WO₃) nanocrystalline powder was successfully synthesized by direct precipitation technique starting from sodium tungstate dehydrate (Na₂WO₄·2H₂O) as precursor at 80°C for 48 h. The morphological characteristics, distribution, and crystallite size of WO₃ nanocrystalline powder were analysed by transmission electron microscopy, X-ray diffraction, and the Fourier transform infrared spectroscopy. According to transmission electron microscopy results, the mean particle size of WO₃ nanocrystalline powder was approximately determined as 41.7 nm. The gas sensing performance of WO₃ nanocrystalline powder for saturated toluene vapor was measured by two probe resistivity unit in a closed vessel at room temperature. In addition, WO₃ nanocrystalline powder was able to respond the lowest concentration of 500 ppm. The results showed that the sample exhibited high sensitivity (93%) and good response reproducibility (0.93+5.5%) for toluene vapor.
Źródło:
Acta Physica Polonica A; 2017, 132, 3; 572-573
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanocomposite Sulfonated PVDF-TiO2 Membranes as a Potential Alternative for Nafion
Autorzy:
Juliandri, Juliandri
Rukiah, Rukiah
Ernawati, E. E.
Handika, R. S.
Nasir, M.
Powiązania:
https://bibliotekanauki.pl/articles/1165508.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
PVDF membrane
conductivity
nanocomposites
titanium oxide
Opis:
Fuel cell is an alternative renewable energy source which potentially able to replace a fossil fuel. Nowadays, common fuel cell membrane generally used is Nafion. PVDF polymer is another synthetic polymer which has excellent physical and chemical properties. The purpose of this research is to synthesize an alternative fuel cell membrane, using sulfonated PVDF doped with TiO2 nanoparticles. Sol-gel method was performed to synthesize TiO2 nanoparticles, with TiCl4 as precursor. PVDF membranes with variation of TiO2 composition (0, 1, 1.5, and 2%) were prepared with ultrasonic method. The composite membranes then were sulfonated with concentrated sulfuric acid. The composite membranes were characterized with FTIR for functional group analysis, SEM-EDX for morphology analysis, acid-base titration for degree of sulfonation, weight difference for degree of water uptake, and four point lines for conductivity. FTIR spectra of the sulfonated membrane show the existence of sulfonic group at wavenumber of 601, 1400, and 1454 cm-1. The result of SEM-EDX analysis shows that the nanoparticles of TiO2 were not distributed homogenously. Degree of sulfonation of the PVDF-TiO2 2% composite membrane is 19.54%, and its water uptake is 23.34%. The highest conductivity is about 3.17 × 10-3 S cm-1 for the PVDF-TiO2 2% composite membrane that is very close to Nafion’s conductivity, 6.08 × 10-3 S cm-1.
Źródło:
World Scientific News; 2018, 107; 150-159
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Equilibrium and kinetics studies for the adsorption of Ni2+ and Fe3+ ions from aqueous solution by graphene oxide
Autorzy:
Konicki, W.
Aleksandrzak, M.
Mijowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/778711.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
nickel
iron
graphene oxide
adsorption
kinetics
Opis:
In this study, the adsorption of Ni2+  and Fe3+  metal ions from aqueous solutions onto graphene oxide (GO) have been explored. The effects of various experimental factors such as pH of the solution, initial metal ion concentration and temperature were evaluated. The kinetic, equilibrium and thermodynamic studies were also investigated. The adsorption rate data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order kinetic model and the intraparticle diffusion model. Kinetic studies indicate that the adsorption of both ions follows the pseudo-second-order kinetics. The isotherms of adsorption data were analyzed by adsorption isotherm models such as Langmuir and Freundlich. Equilibrium data fitted well with the Langmuir model. The maximum adsorption capacities of Ni2+  and Fe3+  onto GO were 35.6 and 27.3 mg g-1 , respectively. In addition, various thermodynamic parameters, such as enthalpy (ΔHO), entropy (ΔSO) and Gibbs free energy (ΔGO), were calculated.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 3; 120-129
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 749

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