Skocz do pozycji: 1.

Tytuł:

Elastic Anisotropic and Thermodynamic Properties of Two BC₇ Phases

Autorzy:

Xing, Mengjiang
Li, Binhua
Yu, Zhengtao
Chen, Qi

Powiązania:

https://bibliotekanauki.pl/articles/1032568.pdf

Data publikacji:

2017-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

ab initio
elastic properties
anisotropic properties
thermodynamic properties

Opis:

The structural, elastic, anisotropic, and thermodynamic properties of P3m1-BC₇ and Pmm2-BC₇ have been studied in this paper utilizing first-principles calculations. In comparison with the elastic properties of Pmm2-BC₇, P3m1-BC₇ exhibits slightly higher values in bulk modulus and B/G, with similar values in shear modulus, the Young modulus, and the Poisson ratio. The calculated Pugh modulus ratio (B/G) and the Poisson ratio demonstrates P3m1-BC₇ from brittle to ductile at 93.60 and 93.73 GPa, respectively. Calculations of shear anisotropic factor, universal elastic anisotropy index, shear modulus, the Young modulus, and the Poisson ratio for BC₇ then demonstrate that Pmm2-BC₇ exhibits a larger elastic anisotropy than P3m1-BC₇. Quasi-harmonic Debye model is finally applied to investigate the Debye temperature, the coefficient of thermal expansion, heat capacity and Grüneisen parameter of Pmm2-BC₇ and P3m1-BC₇.

Źródło:

Acta Physica Polonica A; 2017, 132, 4; 1340-1346
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Interrelations between selected physical and technological properties of wheat grain

Autorzy:

Warechowska, M.
Warechowski, J.
Markowska, A.

Powiązania:

https://bibliotekanauki.pl/articles/298001.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

wheat
grain
physical properties
technological properties
geometrical properties

Opis:

The aim of this work was to determine selected physical properties of wheat grain which are of significance in transport, separation and storage processes as well as to assess the correlations between them and the technological properties of wheat. The grain of two wheat varieties (Eta and Banti) which are popular in Poland was used as research material. The tested properties included: vitreousness, test weight, thousand kernel weight, true density, geometric parameters (thickness, width, length), static friction coefficient of wheat kernels against steel and glass, protein and gluten content and the Zeleny sedimentation value. The grain of the investigated wheat varieties differed in most physical and technological properties. The average length, width and thickness kernels were 6.31 mm, 3.31 mm and 3.03 mm for vr. Banti and 6.05 mm, 3.33 mm, 2.97 mm for vr. Eta. The test weight ranged from 75.68 (Banti) to 78.29 kg • hl-1 (Eta), the thousand kernel weight from 36.3 (Eta) to 39.2 g (Banti) and vitreousness was from 13 (Banti) to 81% (Eta). A correlation between the physical and technological properties of wheat was found. The vitreousness of the wheat grain was positively correlated with protein content (the correlation indices were 0.58 for Banti variety and 0.67 for Eta) and the volume was positively correlated with the true density of grain (r = -0.69 Eta, r = -0.64 Banti). The static coefficient of the friction of wheat grains of two structural materials (metal or glass) is insufficient to predict its technological properties.

Źródło:

Technical Sciences / University of Warmia and Mazury in Olsztyn; 2013, 16(4); 281-290
1505-4675
2083-4527

Pojawia się w:

Technical Sciences / University of Warmia and Mazury in Olsztyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Effect of welding parameters on mechanical and microstructural properties of AL 2024 joints produced by friction stir welding

Autorzy:

Węglowski, M. S.
Pietras, A.
Węglowska, A.
welding, friction stir

Powiązania:

https://bibliotekanauki.pl/articles/246001.pdf

Data publikacji:

2009

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

aluminium alloy 2024
microstructural properties
mechanical properties
fatigue properties

Opis:

Results of Friction Stir Welding (FSW) of aluminium 2024 are presented in this paper. Investigations were conducted on the welding machine, built on the base of the conventional, vertical milling machine. The quality assessment of joints was done on the grounds of the visual inspection, tensile and fatigue tests, the analysis of the welds structure and hardness. Heat treatment was not done after the welding process. The goal of the research was to know the relationship between welding parameters and mechanical and microstructural properties of 2024joints. Results indicate that weldability of aluminium alloys of Al 2024 4 mm in thickness with FSW method is good. Properties ofjoints with the FSW method on the milling machine eąuipped with LOWSTIR device fulfil requirements of this kind of joints. The structure is correct and the tensile properties are higher than properties of arc welded joints. With wide range of welding parameters the high quality of joint is possible. Joints welded with the different tools and in different conditions had characteristic shape of nugget, heat affected zone and thermo-mechanically affected zone. The kind of tool is not affected on properties of FSW joint at the same parameters. The proper quality at four different kind of tool is possible to achieve. Fatigue properties of the FSW joints made in correct way are very high, higher than properties of arc welded joints. Hardness profile of welds had characteristic run, typical for joints welded with the FSW method. The LOWSTIR device is not getting worse the quality of FSW joints.

Źródło:

Journal of KONES; 2009, 16, 1; 523-532
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Characterization of Physical, Chemical and Mechanical Properties of Sri Lankan Coir Fibers

Autorzy:

Dharmaratne, Prasad Dhammika
Galabada, Harsha
Jayasinghe, Randika
Nilmini, Renuka
Halwatura, Rangika Umesh

Powiązania:

https://bibliotekanauki.pl/articles/1838275.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

coir fibre
characterization
physical properties
chemical properties
mechanical properties

Opis:

This study was carried out to determine the characterization of brown coir fiber which is used as a potential reinforcement in polymer composites. The fiber is extracted from the husk of the coconut seeds which are collected in Sri Lanka. Anyhow the above-mentioned characterization can hardly be seen when it comes to the Sri Lankan context. Since the evaluation of their physical, mechanical, and chemical properties are significant before commencing the material development process and applications for this fiber. Several testing were carried out to evaluate the above-mentioned properties. There, the functional groups of coir fiber were obtained by Fourier Transform Infrared analysis and Crystallinity Index and Crystallite size were determined by X-ray diffraction analysis. The surface morphology and cross-sectional features were investigated through Scanning Electron Microscopy. The thermo-gravimetric method was adopted to study the thermal stability of coir fiber. The density and diameter of coir fiber were measured utilizing pychometric method and optical microscope respectively. Tensile strength was measured using an electronic tensometer and then find out the tensile strength, modulus of elasticity, and elongation at breaking point. The average density of brown coir fibers was 1.018 g/cm3 and average diameters were 0.30 mm. The Crystallinity Index and the crystal-line size were 37.28% and 0.4331 nm respectively. Ultimate tensile strength, Young’s modulus, and Elongation of the coir fiber were ranging from 94–159 MPa, 1.2–1.8 GPa, and 21–67%, respectively.

Źródło:

Journal of Ecological Engineering; 2021, 22, 6; 55-65
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Characterization of Physical, Chemical and Mechanical Properties of Sri Lankan Coir Fibers

Autorzy:

Dharmaratne, Prasad Dhammika
Galabada, Harsha
Jayasinghe, Randika
Nilmini, Renuka
Halwatura, Rangika Umesh

Powiązania:

https://bibliotekanauki.pl/articles/1838380.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

coir fibre
characterization
physical properties
chemical properties
mechanical properties

Opis:

This study was carried out to determine the characterization of brown coir fiber which is used as a potential reinforcement in polymer composites. The fiber is extracted from the husk of the coconut seeds which are collected in Sri Lanka. Anyhow the above-mentioned characterization can hardly be seen when it comes to the Sri Lankan context. Since the evaluation of their physical, mechanical, and chemical properties are significant before commencing the material development process and applications for this fiber. Several testing were carried out to evaluate the above-mentioned properties. There, the functional groups of coir fiber were obtained by Fourier Transform Infrared analysis and Crystallinity Index and Crystallite size were determined by X-ray diffraction analysis. The surface morphology and cross-sectional features were investigated through Scanning Electron Microscopy. The thermo-gravimetric method was adopted to study the thermal stability of coir fiber. The density and diameter of coir fiber were measured utilizing pychometric method and optical microscope respectively. Tensile strength was measured using an electronic tensometer and then find out the tensile strength, modulus of elasticity, and elongation at breaking point. The average density of brown coir fibers was 1.018 g/cm3 and average diameters were 0.30 mm. The Crystallinity Index and the crystal-line size were 37.28% and 0.4331 nm respectively. Ultimate tensile strength, Young’s modulus, and Elongation of the coir fiber were ranging from 94–159 MPa, 1.2–1.8 GPa, and 21–67%, respectively.

Źródło:

Journal of Ecological Engineering; 2021, 22, 6; 55-65
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Analysis of stability levee during different flooding wave stages

Autorzy:

Dwornik, M.
Franczyk, A.

Powiązania:

https://bibliotekanauki.pl/articles/184309.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

mechanical properties
hydromechanical properties
material

Opis:

The stability of levee depends mainly on mechanical and hydromechanical properties of material used for its construction. The structural capacity of a system beyond the expected loads or actual loads is calculated to a variety of different underground structures such as slopes, retaining walls or tunnels. The stability of structure is often expressed by Factor of Stability (FoS) obtained by numerical modeling. In case of the stability analysis of the levee, the flooding process is limited to few scenarios of flooding waves. The first approach of determination of the most significant stages of flooding wave shape can be found in Dwornik et al. (2015). In this paper, the stability of earthen levee for different stages and flooding waves was calculated. Stability of the levee was described using Factor of Safety implemented in Itasca Flac 2D 7.0 software using the strength reduction procedure (Itasca 2011). It is applied by a strength reduction method, which reduces the shear strength of the material to bring the slope to a state of limiting equilibrium. The value of FoS bigger than 1.0 indicate the stable construction, whereas the value less than 1.0 should be interpreted as a possible unstable model (Itasca 2011). Numerical modeling presented in this paper was performed for 17 different schemes of flooding wave. All the schemas were slight modification of the flooding wave considered during the ISMOP project (www.ismop.pl, Mościcki et al. 2014). The analysis was conducted to the flooding wave described by the four stages: water level increasing, durability of the height water level, the pace of water level decreasing and durability of the stage between cycles of successive flooding waves. The increasing of the water level assumed in the numerical modeling varied from 0.1 m to 3.5 m in height. The high water level, assumed as a 3.5 m, was different for the individual scenario. The decreasing water level varied from 3.5 m to 0.1 m preceding the low water level assumed 0.1 m in height. Calculations show that levee is stable for all tested construction stages. The lowest FoS value was obtained after decreasing water level in the reservoir between levees. The slowest pace of decreasing water level was assumed, the higher value of FoS was obtain, which indicated better levee stability. The study was partly financed from the statutory research project No. 11.11.140.613 of the Department of Geoinformatics and Applied Computer Science, AGH University of Science and Technology and by the National Centre for Research and Development (NCBiR) in Poland, project PBS1/B9/18/2013 (no 180535).

Źródło:

Geology, Geophysics and Environment; 2016, 42, 1; 67-68
2299-8004
2353-0790

Pojawia się w:

Geology, Geophysics and Environment

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Impact of Carbon Nanotubes on the Mechanical and Electrical Properties of Silicone

Autorzy:

Sałaciński, Michał
Dydek, Kamil
Leski, Andrzej
Kozera, Rafał
Mucha, Mateusz
Karczmarz, Wojciech

Powiązania:

https://bibliotekanauki.pl/articles/24201178.pdf

Data publikacji:

2022

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

nanotubes
silicon
mechanical properties
electrical properties

Opis:

This paper presents the results of a structure study of a dispersion composite on a silicone matrix with a filler in the form of multi-walled carbon nanotubes (MWCNTs). The study aims to determine the effect of the filler on the composite mechanical properties and electrical conductivity. Materials that are electrically conductive and exhibit high mechanical properties can find applications in high-strain sensors. During the study, the characteristic properties of the susceptible materials, silicone alone and silicone with different filler contents (4%, 6%, and 8% by weight), were determined after curing. Microscopic observations were performed to assess the influence of carbon fillers on the material structure and to determine the level of homogeneity of the material. Examination of mechanical properties facilitated the determination of the Shor A hardness (ShA), stiffness, and Poisson’s ratio of the cured composites, depending on the nanotubes’ content. In parallel with the study of mechanical properties, the effect of loading, and the associated deformation of the samples, on the conductivity of the composite was investigated. Based on the results obtained, a discussion was carried out on the type of conductivity characteristic of silicone with different filler content as well as depending on the level of deformation of the samples.

Źródło:

Fatigue of Aircraft Structures; 2022, 14; 135--153
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Electronic, optical and non-linear optical properties of an N-cyclohexylacrylamide molecule : a potential optoelectronic agent

Autorzy:

Tanış, E.
Çankaya, N.

Powiązania:

https://bibliotekanauki.pl/articles/1818235.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich

Tematy:

N-cyclohexylacrylamide
electronic properties
optical properties
non-linear optical properties
DFT

Opis:

In this article, synthesis, electronic and optical properties of an N-cyclohexyl-acrylamide (NCA) molecule are described based on different solvent environments and supported by theoretical calculations. Theoretical calculations have been carried out using a density function theory (DFT). Temperature dependence of the sample electrical resistance has been obtained by a four-point probe technique. Experimental and semitheoretical parameters such as optical density, transmittance, optical band gap, refractive index of the NCA for different solvents were obtained. Both optical values and electrical resistance values have shown that NCA is a semiconductor material. The values of HOMO and LUMO energy levels of the headline molecule indicate that it can be used as the electron transfer material in OLEDs. All results obtained confirm that the NCA is a candidate molecule for OLED and optoelectronic applications.

Źródło:

Opto-Electronics Review; 2020, 28, 4; 191--196
1230-3402

Pojawia się w:

Opto-Electronics Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

The Ru Impurity Effect on Electronic, Optical and Thermoelectric Properties of MoS2 Nano-Sheet: a DFT Study

Autorzy:

Dezfuli, Firouzeh Motamad
Boochani, Arash
Parhizgar, Sara Sadat
Darabi, Elham

Powiązania:

https://bibliotekanauki.pl/articles/2049711.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

MoS2Ru nano-sheet
DFT
electronic properties
optical properties
thermoelectric properties

Opis:

The electronic, optical and thermoelectric properties of MoS2 nano-sheet in presence of the ru impurity have been calculated by density functional theory framework with generalized gradient approximation. The MoRuS2 nano-sheet electronic structure was changed to the n-type semiconductor by 1.3 eV energy gap. The optical coefficients were shown that the loosing optical energy occurred in the higher ultraviolet region, so this compound is a promising candidate for optical sensing in the infrared and visible range. The thermoelectric behaviors were implied to the good merit parameter in the 100K range and room temperatures and also has high amount of power factor in 600K which made it for power generators applications.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 2; 461-468
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Mechanical and Sensitivity Properties of Cast PBXs Containing Agglomerated TATB

Autorzy:

Cai, Jialin
Luo, Guan
Huang, Hui
Zhen, Shensheng
Shi, Yuantong

Powiązania:

https://bibliotekanauki.pl/articles/27788223.pdf

Data publikacji:

2022

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

cast PBXs
TATB
mechanical properties
sensitivity properties

Opis:

The aim of this study was to investigate the effects of agglomerated TATB on the mechanical and sensitivity properties of cast polymer-bonded explosives (PBXs). By introducing agglomerated TATB, cast PBXs with a high solids content can be obtained. The mechanical properties of TATB-based cast PBXs were evaluated by tensile and compression tests. The experimental results showed that the addition of the agglomerated TATB clearly enhanced the ductility and fracture toughness, but decreased the strength of the PBXs. However, the strength increased with the decreasing particle size of the agglomerated TATB. When TATB-crystal was replaced by agglomerated TATB in the cast PBXs, a significant drop in the initial modulus and stress were observed. Samples with a higher content of agglomerated TATB were less sensitive to impact stimuli. The desired mechanical and sensitivity characteristics may be achieved for TATB-based cast PBXs by introducing agglomerated TATB.

Źródło:

Central European Journal of Energetic Materials; 2022, 19, 2; 168--180
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Some applications of barium titanate prepared by different methods

Autorzy:

Sydorchuk, Volodymyr
Khalameida, Svitlana
Skwarek, Ewa
Biedrzycka, Adrianna

Powiązania:

https://bibliotekanauki.pl/articles/2146894.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

barium titanate
synthesis
physicochemical properties
photocatalytic properties

Opis:

The paper presents some application of barium titanate synthesized by different methods. Barium titanate samples were prepared by four procedures: solid state, mechanochemical as direct synthesis and modification as well as hydrothermal and microwave. The obtained samples were systematically studied using X-ray diffraction, nitrogen adsorption, Fourier transform infrared spectroscopy (FTIR), potentiometric titration, and quasi-elastic light scattering and zeta potential measurements. The values of pHpzc (point of zero charge) and pHIEP (isoelectric point) characteristic of the electrical double layer were determined. The prepared samples were tested as photocatalysts under visible light. As a result, relationship between the conditions of barium titanate synthesis, its physicochemical and electrokinetic parameters, as well as photocatalytic activity under visible light was first established.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 2 (Special issue - selected papers conference: Physicochemistry of interfaces - instrumental methods); art. no. 147192
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Influence of starch content on selected properties of hardboard

Autorzy:

Wronka, Anita
Rdest, Adam
Kowaluk, Grzegorz

Powiązania:

https://bibliotekanauki.pl/articles/2200220.pdf

Data publikacji:

2020

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

potato starch
fiberboard
mechanical properties
physical properties

Opis:

Influence of starch content on selected properties of hardboard. The aim of the research was to examine the possibility of producing wet-formed fiberboard using a different content of potato starch. The scope of works included the production of plates in laboratory conditions with 0, 1, 5, 10 and 20% mass content of potato starch and subjecting them to selected physical and mechanical tests. Thanks to the research, it was possible to produce a hard fiberboard hardboard using a mass fraction of starch. The results of the tests confirmed that as the starch content in the panel increases, the value of mechanical properties increases also.
Wpływ udziału skrobi na wybrane właściwości płyt pilśniowych mokroformowanych. Celem badań było określenie możliwości produkcji płyt pilśniowych twardych (mokroformowanych) z wykorzystaniem różnego udziału skrobi ziemniaczanej, jako środka wzmacniającego. Zakres prac obejmował wytworzenie płyt w warunkach laboratoryjnych przy: 0, 1, 5, 10, 20% udziale masowym skrobi ziemniaczanej oraz poddanie ich wybranym próbom fizycznym i mechanicznym. Potwierdzono możliwość wytwarzania płyt pilśniowych twardych z wykorzystaniem skrobi.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 109; 48--52
1898-5912

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

A Novel Theoretical Study of Elastic and Electronic Properties of M₂CdC (M = Zr, Hf, and Ta) MAX Phases

Autorzy:

Mebrek, M.
Mokaddem, A.
Doumi, B.
Yakoubi, A.
Mir, A.

Powiązania:

https://bibliotekanauki.pl/articles/1030613.pdf

Data publikacji:

2018-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

MAX phases
ab initio
structural properties
electronic properties
elastic properties
crystal structure

Opis:

In this study, we have investigated the structural, electronic, and elastic properties of the M₂CdC (M = Ta, Zr, and Hf) MAX phases, using the first-principle methods based on the density functional theory. The calculated formation energies revealed that these compounds are thermodynamically stable in the hexagonal MAX phase. The stability is confirmed by the elastic constants and the conditions of mechanical stability criterion. Also, we have determined the bulk and shear modules of the Young modulus and the Poisson coefficient. The band structures indicate that the three materials are electrically conductive. The chemical bond in M₂CdC is covalent-ionic in nature with the presence of metallic character. For the density of states the hybridization peak between M d and C p occurs in the lower energy range. We have found that there is no gap for these materials due to the existence of a maximum peak of DOS around Fermi level.

Źródło:

Acta Physica Polonica A; 2018, 133, 1; 76-81
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Influence of chitosan nonwoven fabric modification on its physicochemical and biological properties

Autorzy:

Dzierzkowska, Ewa
Ścisłowska-Czarnecka, Anna
Kolesińska, Beata
Boguń, Maciej
Stodolak-Zych, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/284448.pdf

Data publikacji:

2019

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nonwoven fabric
modification
physicochemical properties
biological properties

Źródło:

Engineering of Biomaterials; 2019, 22, no.153; 108
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Wood plastic composites as a substitution for HDF

Autorzy:

Borysiuk, Piotr
Auriga, Radosław

Powiązania:

https://bibliotekanauki.pl/articles/2171758.pdf

Data publikacji:

2022

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

WPC
composites
PLA
mechanical properties
physical properties

Opis:

Wood plastic composites as a substitution for HDF. As part of the research, industrial HDF boards were used and WPC composites were produced, differentiated in terms of matrix (PLA and HDPE) and filler content (40%, 50% and 60%). The density and density profile was measured to compare HDF and WPC structure. In addition, the manufactured boards were tested for strength (MOR, MOE), screw holding, thickness swelling and water absorption after immersion in water for 2 and 24 hours. WPC were characterized by a higher density than HDF boards and a uniform density profile. In addition, WPC composites were characterized by lower MOR and MOE values than HDF boards. Compared to HDF boards, WPC composites were characterized by higher values of screw holding and better resistance to moisture.
Kompozyty WPC jako substytut płyt HDF. W ramach badań wykorzystano przemysłowe płyty HDF oraz wytworzono kompozyty WPC zróżnicowane pod kątem matrycy (PLA i HDPE) oraz udziału napełniacza (40%, 50% i 60%). Oznaczono gęstość i profil gęstości w celu porównania struktury HDF i WPC. Ponadto wytworzone płyty zostały przetestowane pod kątem wytrzymałości (MOR, MOE), utrzymania wkrętów, spęcznienia na grubość oraz nasiąkliwości po moczeniu w wodzie przez 2 i 24 godziny. WPC charakteryzowały się wyższa gęstością niż płyty HDF oraz jednorodnym profilem gęstości. Ponadto kompozyty WPC charakteryzowały się niższymi wartościami MOR i MOE niż płyty HDF. W porównaniu do płyt HDF kompozyty WPC charakteryzowały się wyższymi wartościami zdolności utrzymania wkrętów oraz lepszą odpornością na działanie wilgoci.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2022, 119; 84--93
1898-5912

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Silver Matrix Composites - Structure and Properties

Autorzy:

Wieczorek, J.
Oleksiak, B.
Łabaj, J.
Węcki, B.
Mańka, M.

Powiązania:

https://bibliotekanauki.pl/articles/351539.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

silver matrix composites
tribological properties
mechanical properties

Opis:

Phase compositions of composite materials determine their performance as well as physical and mechanical properties. Depending on the type of applied matrix and the kind, amount and morphology of the matrix reinforcement, it is possible to shape the material properties so that they meet specific operational requirements. In the paper, results of investigations on silver alloy matrix composites reinforced with ceramic particles are presented. The investigations enabled evaluation of hardness, tribological and mechanical properties as well as the structure of produced materials. The matrix of composite material was an alloy of silver and aluminium, magnesium and silicon. As the reinforcing phase, 20-60 μm ceramic particles (SiC, SiO₂, Al₂O₃ and Cs) were applied. The volume fraction of the reinforcing phase in the composites was 10%. The composites were produced using the liquid phase (casting) technology, followed by plastic work (the KOBO method). The mechanical and tribological properties were analysed for plastic work-subjected composites. The mechanical properties were assessed based on a static tensile and hardness tests. The tribological properties were investigated under dry sliding conditions. The analysis of results led to determination of effects of the composite production technology on their performance. Moreover, a relationship between the type of reinforcing phase and the mechanical and tribological properties was established.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 1; 323-328
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Preparation of polymer materials containing titanium compounds

Autorzy:

Drabczyk, A.
Kudłacik-Kramarczyk, S.
Tyliszczak, B.

Powiązania:

https://bibliotekanauki.pl/articles/101630.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN

Tematy:

titanium
polymers
antifungal properties
wettability
mechanical properties

Opis:

Titanium compounds in view of their physicochemical properties constitute interesting materials applied in chemical synthesis. They are used for preparation of antifungal agents as well as for production of self-cleaning coatings. Moreover, mentioned inorganic compounds are characterized by a capability of neutralizing of unpleasant odor. Those all characteristics make these substances useful in many fields. In the framework of presented research series of polymer materials modified with titanium and titanium oxide have been obtained by means of photopolymerization. In the further step, studies on such synthesized materials have been conducted with particular emphasis on determining a mechanical properties and wettability. Hardness of prepared polymers have been tested by means of Shore durometer. Based on the research it can be concluded that addition of titanium compounds to the polymer matrix resulted in the improvement of mechanical properties as well as in an increase of hydrophobicity. It is worth mentioning that it is possible to manipulate properties of the obtained compositions by the introduction of an appropriate amount of additive into their matrices.

Źródło:

Infrastruktura i Ekologia Terenów Wiejskich; 2017, IV/2; 1659-1672
1732-5587

Pojawia się w:

Infrastruktura i Ekologia Terenów Wiejskich

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Effect of Sb and MnO2-Doping on Phase Transitions, Crystal Structure, Thermal, Dielectric, Ferroelectric and Piezoelectric Properties of Na0.5K0.5NbO3 Ceramics

Autorzy:

Suchanicz, J.
Faszczowy, I.
Czaja, P.
Kusz, J.
Zubko, M.

Powiązania:

https://bibliotekanauki.pl/articles/354339.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Na0.5K0.5-NbO3-based ceramics
structural properties
ferroelectric properties
dielectric properties
piezoelectric properties

Opis:

Lead-free ceramics of Na_0.5 K_0.5 Nb_1-x Sb_x O₃ (NKNS) and Na_0.5 K_0.5 Nb_1-x Sb_x O₃ + 0.5 mol%MnO₂ (NKNS + 0.5 mol%MnO₂) (0 < x < 0.06) ceramics were prepared by a conventional solid-state hot pressing method. The ceramics possess a single-phase perovskite structure with orthorhombic symmetry. Microstructural examination revealed that Mn doping of NKNS leads to improvement of densification. The cubic-tetragonal and tetragonal-orthorhombic phase transitions of NKNS shifted to higher and lower temperature, respectively after introduction of Mn ion. Besides, ferroelectric and piezoelectric properties were improved. The results were discussed in term of difference in both ionic size and electronegativity of Nb⁵⁺ and Sb⁵⁺ and improvement of densification after Mn ion doping.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 2; 633-639
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

On the Bahadur efficiency of some tests of independence

Autorzy:

Ledwina, Teresa

Powiązania:

https://bibliotekanauki.pl/articles/748271.pdf

Data publikacji:

1985

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

Asymptotic properties

Opis:

.
In the paper we give a short review of results connected with deriving of Bahadur efficiency. Moreover, calculations of the Bahadur efficiency of some tests of independence are discussed,

Źródło:

Mathematica Applicanda; 1985, 13, 25
1730-2668
2299-4009

Pojawia się w:

Mathematica Applicanda

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Metoda badania własności statycznych i dynamicznych obiektowego oprogramowania symulacyjnego
Object oriented simulator programs with static and dynamic properties analysis

Autorzy:

Gaj, A.

Powiązania:

https://bibliotekanauki.pl/articles/305895.pdf

Data publikacji:

2008

Wydawca:

Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego

Tematy:

symulacja
własności obiektowego oprogramowania symulacyjnego
simulation
object-oriented properties
static properties
dynamic properties

Opis:

Artykuł dotyczy problemów badania własności obiektowych aplikacji symulacyjnych. W punkcie 2 opisano metody badania projektu aplikacji i jej kodu źródłowego. W rozdziale 3 opisano metody badania pracującej aplikacji obiektowej. Omówiono metody badania zjawisk zachodzących wewnątrz uruchomionej aplikacji symulacyjnej i w systemie operacyjnym.
This article relates to the problems of research of the object-oriented properties of the simulator programs. Chapter 2 concerns the methods of research of application design and its source code. Chapter 3 describes the methods of research of running object-oriented application. It also shows the methods of research of events taking place inside running applications and its environment.

Źródło:

Biuletyn Instytutu Systemów Informatycznych; 2008, 1; 17-23
1508-4183

Pojawia się w:

Biuletyn Instytutu Systemów Informatycznych

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Ratings of Affective and Non-Affective Aspects of German Idioms in Second Language Processing

Autorzy:

Petrič, Teodor

Powiązania:

https://bibliotekanauki.pl/articles/783242.pdf

Data publikacji:

2019

Wydawca:

Wydawnictwo Uniwersytetu Śląskiego

Tematy:

SLA
idioms
affective properties
psycholinguistic properties
German
Slovene

Opis:

AbstractIn this paper psycholinguistic and emotional properties of 619 German idiomatic expressions are explored. The list of idiomatic expressions has been adapted from Citron et al. (2015), who have used it with German native speakers. In our study the same idioms were evaluated by Slovene learners of German as a foreign language. Our participants rated each idiom for emotional valence, emotional arousal, familiarity, concreteness, ambiguity (literality), semantic transparency and figurativeness. They also had the task to describe the meaning of the German idioms and to rate their confidence about the attributed meaning. The aims of our study were (1) to provide descriptive norms for psycholinguistic and affective properties of a large set of idioms in German as a second language, (2) to explore the relationships between psycholinguistic and affective properties of idioms in German as a second language, and (3) to compare the ratings of the German native speakers studied in Citron et al. (2015) with the ratings of the Slovene second language learners from our study. On one hand, the results of the Slovene participants show many similarities with those of of the German native speakers, on the other hand, they show a slight positivity bias and slightly shallower emotional processing of the German idioms. Our study provides data that could be useful for future studies investigating the role of affect in figurative language in a second language setting (methodology, translation science, language technology).

Źródło:

Theory and Practice of Second Language Acquisition; 2019, 5, 1; 11-42
2450-5455
2451-2125

Pojawia się w:

Theory and Practice of Second Language Acquisition

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Dwuwymiarowe zagadnienia niejednorodnej półprzestrzeni sprężystej obciążonej na jej powierzchni
Two-dimensional problem of non-homogeneous elastic half-space loaded on its boundary surface

Autorzy:

Kulczycki-Żyhajło, R.
Rogowski, G.
Kołodziejczyk, W.

Powiązania:

https://bibliotekanauki.pl/articles/386657.pdf

Data publikacji:

2007

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

sprężystość
właściwości mechaniczne
elasticity
material properties
mechanical properties

Opis:

Rozpatrzono dwuwymiarowe zagadnienia teorii sprężystości dotyczące obciążenia powierzchni półprzestrzeni sprężystej pokrytej niejednorodną warstwą innego materiału sprężystego. Warstwę o zmieniających się właściwościach mechanicznych modelowano skończoną ilością warstw o starych właściwościach mechanicznych.
The paper deals with a two-dimensional problem of an elastic non-homogeneous half-space loaded on its boundary. The body is compared of a non-homogeneous layer and a homogeneous half-space. The layer with changing material properties is described by a finite number of homogeneous layers.

Źródło:

Acta Mechanica et Automatica; 2007, 1, 1; 51-54
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Structural and optical properties of nanostructured bismuth oxide

Autorzy:

Ali, R. S.

Powiązania:

https://bibliotekanauki.pl/articles/412556.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

thin films’ bismuth oxide
optical properties
structural properties

Opis:

Thin films of bismuth oxide have been prepared utilizing vacuum evaporation. XRD anyalysis reveal that all the films were tetragonal polycrystalline structure with a preferred orientation along (002) plane. SEM images indicate that the grain size fall in the category of nanosize. AFM results assure that the nanonstructure behavior of thin films. Optical studies show that these films have a direct transition with optical energy gap equal to 2.5 eV.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 15; 64-72
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

First Principle Investigations on Electronic, Magnetic, Thermodynamic, and Transport Properties of TlGdX₂ (X = S, Se, Te)

Autorzy:

Gautam, R.
Kumar, A.
Singh, R.

Powiązania:

https://bibliotekanauki.pl/articles/1032602.pdf

Data publikacji:

2017-10

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

semiconductors
electronic structure
magnetic properties and thermodynamic properties

Opis:

In the present research paper, we investigated spin polarized electronic, magnetic, thermodynamic, and transport properties of thallium gadolinium dichalcogenides TlGdX₂ (X = S, Se, Te) using density functional theory. Electronic structure reveals that all the three compounds are wide band gap semiconductors which are beneficial for good thermoelectric performance. Calculated magnetic moment of TlGdX₂ is found to be in good agreement with available experimental values and mainly dominant by Gd³⁺ ions. Semiclassical Boltzmann transport theory has been used to calculate the Seebeck coefficient and electrical conductivity for the proposed dichalcogenides. Calculated values of the Seebeck coefficient and electrical conductivity are found to be consistent with available experimental values in literature. Thermodynamic properties of TlGdX₂ have also been estimated for the first time and explained on the basic facts.

Źródło:

Acta Physica Polonica A; 2017, 132, 4; 1371-1378
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Bioactive Membranes from Cellulose with a Graphene Oxide Admixture

Autorzy:

Machnicka, A.
Fryczkowska, B.

Powiązania:

https://bibliotekanauki.pl/articles/123371.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

cellulose
graphene oxide
membranes
bactericidal properties
fungicidal properties

Opis:

The paper presents the results of microbiological tests of composite membranes made of cellulose (CEL) with graphene oxide (GO) admixture. At the beginning, the antibacterial properties of the GO in aqueous solutions of various concentrations (0.001; 0.01; 0.1% w/w) were studied, and the obtained results allowed to use GO as an additive to cellulose membranes. The solution used to prepare the membranes was a 5% cellulose solution (CEL) in 1-ethyl-3-methylimidazolium acetate (EMIMAc), into which various amounts of graphene oxide (GO) dispersed in N,N-dimethylformamide (DMF) were added (0.5÷28.6% of GO). From this solution, composite membranes were formed using phase inversion method. It was observed that the GO addition influences the process of membrane formation and their physicochemical properties. The obtained membranes were subjected to microbiological tests using the Gram-negative bacteria (Escherichia coli), Gram-positive bacteria (Staphylococcuc aureus) and fungi (Candida albicans). It was observed that the GO addition to the cellulose membrane (GO/CEL) inhibited the growth of bacteria and fungi, and the biological activity as dependent on the type of living organism and the size of GO particles.

Źródło:

Journal of Ecological Engineering; 2018, 19, 6; 231-240
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Relationships between comminution and chemical, petrographic and mineralogical properties of ores, and their effect on concentration

Autorzy:

Deniz, Vedat

Powiązania:

https://bibliotekanauki.pl/articles/2146932.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

ores
minerals
comminution
chemical properties
petrographic-mineralogical properties

Opis:

Especially in terms of energy costs, data on chemical, petrographical, and mineralogical analyses of ores or minerals can provide very important information for their production in the desired size distribution. Therefore, suitable crushing and grinding machines can be selected, taking into account the data affecting the comminution such as grain size, texture, metamorphism, and mineral or element contents. However, in most mineral processing plants, these data are rarely used to understand the response of ores or minerals to comminution. Analysis of the relationships between the chemistry, petrography, and mineralogy of ores and the breakage mechanism during crushing or grinding has been the subject of researchers in the comminution field in recent years. This study is a review of studies done so far on the relationships between the comminution and the chemical, petrographic, and mineralogical properties of different ores and minerals, and their effect on concentration.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 5; art. no. 149892
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Wybrane właściwości fizykochemiczne i użytkowe estrów metylowych kwasów tłuszczowych oleju rzepakowego jako paliwa silnikowego
Selected physical, chemical and functional properties of fatty acid methyl esters of rape-seed oil as the engine fuel

Autorzy:

Jakóbiec, J.
Ambrozik, A.

Powiązania:

https://bibliotekanauki.pl/articles/287430.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

biopaliwo RME
właściwości fizykochemiczne
właściwości użytkowe
RME biofuel
chemical properties
physical properties
functional properties

Opis:

W pracy przedstawiono informacje dotyczące wymagań jakościowych i metod badań estrów metylowych kwasów tłuszczowych oleju rzepakowego jako paliwa do silników o zapłonie samoczynnym. Podkreślono zasadnicze różnice we właściwościach fizykochemicznych i użytkowych FAME w stosunku do oleju napędowego. Zamieszczono wyniki badań laboratoryjnych procesów starzeniowych FAME w określonych warunkach i czasu przechowywania oraz właściwości użytkowe w tym podatność na rozkład mikrobiologiczny i właściwości niskotemperaturowe.
The paper presents information concerning qualitative requirements and test methods for fatty acid methyl esters of rape-seed oil being the fuel for self-ignition engines. The authors emphasized essential differences in physical, chemical and functional properties of the FAME compared to diesel oil. The work contains the results of laboratory tests concerning the FAME ageing processes in certain conditions and storage time, and functional properties including susceptibility to microbiological decomposition and low temperature properties.

Źródło:

Inżynieria Rolnicza; 2008, R. 12, nr 9(107), 9(107); 107-115
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Optical and Structural Properties of Cu2O thin Film as Active Layer in Solar Cells Prepared by DC Reactive Magnetron Sputtering

Autorzy:

Sawicka-Chudy, P.
Wisz, G.
Sibiński, M.
Cholewa, M.
Potera, P.
Głowa, Ł.
Pawełek, R.

Powiązania:

https://bibliotekanauki.pl/articles/352619.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Cu2O thin films
optical properties
surface properties
compositional properties
energy band gap

Opis:

A series of copper oxide thin films were synthesized through direct current magnetron sputtering on glass and silicon substrates with various process parameters. Initially, optical microscopy images and their histograms were analyzed to determine the optical quality of the obtained layers and then histograms were created using Image Histogram Generator software. Next, the morphology, and cross-section and layer composition of the samples were evaluated. Finally, the transmission spectra of the thin films were recorded. Transmittance and reflection spectra of the UV–vis analysis were utilized to calculate the optical band gap, the extinction coefficient, and the absorption coefficient of the oxidized layers. Samples showed low transmittance (up to 40%) in the region of 400 to 1000 nm. The mean absorption coefficient varied from ~3 · 10⁵ to ~6 · 10⁵ 1/cm and from ~2 · 10⁵ to ~4 · 10⁵ 1/cm in the region of 2 eV to 3.5 eV. The extinction coefficient ranged from 0 to 0.11 in the region from 300 to 3000 nm. Reflectance of the samples was ~20% in the region of 1000 to 2500 nm and ranged from 20%-50% in the region of 1000 to 3000 nm. We verified the process parameters of the Cu₂O structure to improve the quality as a buffer layer. On the basis of this preliminary analysis, we propose the most promising and future-oriented solutions in photovoltaic applications.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 1; 243-250
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Microstructure and Properties of Multifibre Composites

Autorzy:

Głuchowski, W.
Rdzawski, Z.
Domagała-Dubiel, J.
Sobota, J.

Powiązania:

https://bibliotekanauki.pl/articles/356505.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

fibrous composite
copper matrix
microstructure
mechanical properties
electrical properties

Opis:

In the study microstructure and properties of composite multifibre copper-base wires are presented. A decision was made to produce wires with “soft” fibres (Al) and “hard” fibres (Fe). In the study the phenomenon occurring on the border of Al-Cu was also analysed. The produced Cu-Al and Cu-Fe composites presented ordered microstructure with the fibres uniformly distributed in the copper matrix. The composites underwent plastic consolidation to the degree which provided satisfactory mechanical and electrical properties. During the drawing the fibres deformed proportionally with copper matrix therefore their content in the cross section remained unchanged.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 2B; 911-916
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Effect of Selected Alloying Elements on the Soft-Magnetic and Mechanical Properties of Injection-Cast Fe61Co10Y8Me1B20 Alloys (Me = Nb, W or Mo)

Autorzy:

Pietrusiewicz, P.
Nabiałek, M.

Powiązania:

https://bibliotekanauki.pl/articles/356969.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

magnetic properties
mechanical properties
abrasion resistance
microhardness
Curie temperature

Opis:

Properties of amorphous alloys differ from each other when they are produced at different cooling rates and from different chemical compositions. This paper presents studies of the magnetic and mechanical properties of Fe₆₁Co₁₀ Y₈ Nb₁ B₂₀, Fe₆₁ Co₁₀ Y₈ -W₁ B₂₀ and Fe₆₁ Co₁₀ Y₈ Mo₁ B₂₀ alloys, in the form of plates, produced by the injection of liquid alloy into a copper mould. Based on the performed studies, it was found that the substitution of 1% non-magnetic additive into the alloy composition had little effect, as regards the values of saturation magnetization (M_s ) and Curie temperature (T_c ). However, in the case of the coercive field, the sample with the W addition had a value almost half that of the other two alloys. For all of the studied alloys, the microhardness was about 1180 μHv100, i.e. significantly higher than for the same materials in the crystalline state.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 1; 61-64
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Effect Cd Doping on the Structural and Optical Properties of ZnO Thin Films

Autorzy:

Najim, J. A.
Rozaiq, J. M.

Powiązania:

https://bibliotekanauki.pl/articles/412167.pdf

Data publikacji:

2013

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

ZnO thin films
semiconductor doping
optical properties
structure properties

Opis:

ZnO thin films with Cd/Zn nominal ratios of 0 %, 1 %, 3 %, 5 %, and 7 % and thickness of 0.7 μm were prepared by chemical spray pyrolysis. X-ray diffraction patterns showed that the films have polycrystalline structures and peaks matching the hexagonal ZnO structure. Crystallite sizes ranged from about 35 nm to 87 nm. As the doping concentration increased, full width at half maximum values decreased and crystallite sizes increased. The UV-Vis spectra of the ZnO:Cd films showed high transparency in the visible region. The optical band gap of the ZnO:Cd films decreased from 3.255 eV to 3.17 eV with increasing Cd doping concentration. The transition type was direct, thereby allowing transition. The ZnO:Cd thin films were annealed at 400 °C, and annealing treatment showed improvements in the properties of the derived films.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 137-150
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Investigation of Microstructure, Mechanical and Corrosion Properties of Biodegradable Mg-Ag Alloys

Autorzy:

Elen, Levent
Turen, Yunus
Ahlatci, Hayrettin
Sun, Yavuz
Unal, Mehmet

Powiązania:

https://bibliotekanauki.pl/articles/2125533.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Mg-Ag alloys
biodegradable
mechanical properties
microstructure properties
corrosion

Opis:

In this study, microstructure, mechanical, corrosion and corrosive wear properties of Mg-xAg the as-cast and extruded alloys (x: 1, 3 and 5 wt.%Ag) were investigated. According to the experimental results, as the amount of Ag added in the casting alloys increases, the secondary phases (Mg4Ag, Mg54Ag17) emerging in the structure have become more clarified. Furthermore, it was observed that as the amount of Ag increased, the grain size decreased and thus the mechanical properties of the alloys increased. Similarly, the extrusion process enabled the grains to be refined and the mechanical properties to be increased. As a result of the in vitro tests performed, the Mg-1Ag exhibited very bad corrosion properties compared to other alloys. On the other hand, according to corrosive wear tests results, a high wear rate and friction coefficient were found for Mg-5Ag alloys.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 3; 889-900
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Theoretical Studies of High-nitrogen-containing Energetic Compounds Based on the s-Tetrazine Unit

Autorzy:

Man, T. T.
Wang, K.
Zhang, J.G.
Niu, X. Q.
Zhang, T. L.

Powiązania:

https://bibliotekanauki.pl/articles/358527.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

high-energy-density materials (HEDMs)
substituted s-tetrazine
compounds
electronic properties
thermodynamic properties
detonation
properties

Opis:

In order to develop new high-energy-density materials (HEDMs), we have investigated 12 substituted s-tetrazine (TZ) compounds, where s-tetrazine was substituted by amino, amido and related groups. Density functional theory (DFT) was used to predict the optimized geometries, electronic structures, total energy, heats of formation (HOFs) and densities. In addition the detonation properties were evaluated by using the VLW equation of state (EOS). The standard enthalpy of formation, the Gibbs free energy, entropy and equilibrium constants were used to estimate the success of the synthetic substitution reactions, which provided theoretical support for practical work. The bond dissociation energy (BDE) of bond C-R was calculated at each stage of the substitution reaction. The calculated results showed that substitution of amino, amido and their derivatives in the TZ ring enhances the HOF values and is favorable for increasing the thermal stability. The calculated detonation properties indicated that incorporating the above groups into the TZ ring is benefcial for improving the explosive performance. Considering the detonation properties and thermal stability, the 12 derivatives may be regarded as promising candidates as high-energy-density materials (HEDMs).

Źródło:

Central European Journal of Energetic Materials; 2013, 10, 2; 171-189
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Praktycznie o rusztowaniach i deskowaniach
Scaffoldings and falsework - a practical approach

Autorzy:

Szruba, M.

Powiązania:

https://bibliotekanauki.pl/articles/365362.pdf

Data publikacji:

2017

Wydawca:

Nowoczesne Budownictwo Inżynieryjne

Tematy:

właściwości rusztowań
właściwości deskowań
scaffolding properties
properties of formwork

Opis:

Oferowane na rynku elementy systemowe pozwalają na dopasowanie deskowań i rusztowań zarówno do prostych, jak i bardziej skomplikowanych pod względem geometrii obiektów. Spełniając rygorystyczne wymagania normowe, deskowania i rusztowania wychodzą naprzeciw oczekiwaniom klientów – są proste w budowie i szybkie w montażu. Prawidłowy montaż i użytkowanie są szczególnie istotne, gdyż błędy podczas prac budowlanych mogą skutkować groźbą poważnych wypadków.
The commercial systems available on the market today make it possible to provide the appropriate falsework and scaffoldings for structures with both simple and complex geometry. Conforming to the strict industry standards, the falsework and scaffoldings meet the clients' expectations by ensuring easy and fast rection and assembly. The correct assembly and use are essential, as mistakes made during construction works may result in serious accidents and injuries.

Źródło:

Nowoczesne Budownictwo Inżynieryjne; 2017, 2; 93-96
1734-6681

Pojawia się w:

Nowoczesne Budownictwo Inżynieryjne

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 35.

Tytuł:

Badanie rozkładów właściwości elektrycznych i optycznych monokryształów GaP stosowanych w optyce podczerwieni
Investigation of spatial distributions of electrical and optical properties of GaP single crystals

Autorzy:

Strzelecka, S.
Hruban, A.
Jurkiewicz-Wegner, E.
Piersa, M.
Orłowski, W.
Mirowska, A.

Powiązania:

https://bibliotekanauki.pl/articles/192034.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych

Tematy:

GaP
własności elektryczne
własności optyczne
optical properties
electrical properties

Opis:

Niedomieszkowane monokryształy GaP o niskiej koncentracji nośników n ≤ 2 × 10^16cm-³ stosowane są głównie na elementy optyczne pracujące w bliskiej podczerwieni w zakresie widmowym (1-8) μm oraz w dalekiej podczerwieni (100 - 200) μm. Elementy te mogą posiadać duże rozmiary Φ (2”-3”). Jednym z podstawowych wymagań dla monokryształów stosowanych na elementy optyczne jest duża jednorodność własności, których miernikiem może być transmitancja. Na wartość i jednorodność transmitancji mogą mieć wpływ takie czynniki jak poziom i rozkład koncentracji nośników prądu, gęstości dyslokacji i koncentracji centrów defektowych. W ramach obecnej pracy badano wpływ tych czynników. Stwierdzono, że istnieje jednoznaczna zależność transmitancji tylko od koncentracji nośników prądu. Empirycznie wyznaczono tę zależność dla zakresu koncentracji nośników n = 10^15 - 5× 10^16cm-³ przy długości fali λ = 3100 nm.
Undoped GaP crystals with low carrier concentration n ≤ 2 × 10^16cm-³ are mainly used on optic elements working in near infrared (1-8) um and far infrared (100 - 200) um wave range. These elements can be large Φ = (2”-3”). High homogeneity of the properties responsible for transmittance value is one of the fundamental requirement for GaP crystals used on optical elements. Value and distribution of carrier concentration, etch pits density and concentration defect centers can influence on value and homogeneity of transmittance. In the present work these factors were investigated. Distinct transmittance dependence on carrier concentration was only confirmed. This dependence was empirically determined in concentration range n = 10^15 - 5x10^16cm-³ at wavelength λ = 3100nm.

Źródło:

Materiały Elektroniczne; 2009, T. 37, nr 2, 2; 22-27
0209-0058

Pojawia się w:

Materiały Elektroniczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Possibility of use a small fraction of rape seeds for the production of biofuels for compression ignition engines

Autorzy:

Tańska, M.
Ambrosewicz-Walacik, M.
Nitkiewicz, S.

Powiązania:

https://bibliotekanauki.pl/articles/247821.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

rape seeds
size
physical properties
chemical properties
biofuel production

Opis:

The aim of the study was to determine the possibility of using small seeds of rape (diameter <1.6 mm,) perceived as a raw material of inferior nutritional quality, for the biofuels production. Research material was samples of industrial mass of rapeseeds originating from three Polish regions. The seed mass was cleaned in a sieve separator, removing mineral matter (stones), cereal grains, stems and dusts. Then, the sample was sifted through a set of sieves and two fractions were received: seeds with diameter >1.6 mm – sample F1 and with diameter < 1.6 mm – sample F2. Each fraction was characterized by its share in bulk mass, moisture content, 1000 seeds weight, yield of pressing, fat content and phosphorus content. Cold-pressed oils were determined in terms of total and unhydrated phosphorus content, acid value and fatty acids content. Fractionation by weight rapeseeds with using an industrial sieve separation may provide a simple method for improving the technological value of the raw material used for food purposes, and thus obtain fine seed that could be intended exclusively for the production of technical oil. Despite the stated inferior quality of small seeds, it was found that the increased values of some discriminants would not have impact on the technology of biofuel production and cost of production.

Źródło:

Journal of KONES; 2016, 23, 1; 391-395
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Experimental verification of the deep hole boring bar model

Autorzy:

Kępczak, Norbert
Bechciński, Grzegorz
Rosik, Radosław

Powiązania:

https://bibliotekanauki.pl/articles/1841802.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

boring bar
modal analysis
FEM
dynamic properties
static properties

Opis:

The article presents the results of the experimental verification of the deep hole boring bar tool model. The aim of the work was to obtain a verified boring bar tool model, which in further scientific research will be a starting point for creating a prototype of a tool with a new design, in which dynamic properties will be improved. The research was divided into two stages. In the first stage, modal studies of the model and the real object were carried out. The obtained discrepancy between numerical and experimental results below 8% allows to state that the model is characterized by dynamic properties occurring in the real boring bar. In the second stage of the research, static tests were carried out. The object was loaded with forces of 98.6 N, 195.0 N, 293.8 N. The obtained slight discrepancy in the results of numerical and experimental tests below 3% allows to state that the model reflects the static properties of the real boring bar. The high convergence of the theoretical and experimental results allows for the conclusion that the numerical model has been verified positively.

Źródło:

Eksploatacja i Niezawodność; 2021, 23, 1; 55-62
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Effect of gamma irradiation on microbiological and nutritional properties of the freeze-dried berries

Autorzy:

Mašić, Slobodan
Vujčić, Ivica

Powiązania:

https://bibliotekanauki.pl/articles/2055687.pdf

Data publikacji:

2021

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

freeze-drying
gamma irradiation
lyophilization
microbiological properties
nutritional properties

Opis:

Lyophilization or freeze-drying is the technique of removing ice or other frozen solvents from a material through sublimation and the removal of bound water molecules through the process of desorption. Drying occurs in an absolute vacuum at temperatures from –40°C to –50°C. This technique is often used for the conservation of fruits, especially berries. During this process, the water changes from frozen to gaseous, with no thawing. Due to low temperatures and the high vacuum, most microorganisms are rendered inactive during the lyophilization process. However, ifthere is a necessity to destroy all microorganisms from treated food, subsequent irradiation with gamma rays is an appropriate method. This paper investigated the influence of different doses of gamma radiation on lyophilized berries’ microbiological characteristics. It was shown that the radiation dose of 7 kGy is suffi cient to eliminate the total number of microorganisms (excluding molds) to the extent that the number falls below the permitted limit according t o the law on the microbiological safety of foodstuffs of the Republic of Serbia, and 5 kGy is enough for molds to be rendered inactive. It was also concluded that gamma irradiation does not affect the nutritional value of lyophilized berries.

Źródło:

Nukleonika; 2021, 66, 4; 221--225
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Research on innovative foils for agricultural applications

Autorzy:

Jałbrzykowski, Marek
Obidziński, Sławomir
Świder, Wioletta
Dołżyńska, Magdalena

Powiązania:

https://bibliotekanauki.pl/articles/297850.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

LDPE foil
reduced graphene oxide
antibacterial properties
mechanical properties

Opis:

The paper presents the results of a study investigating the impact of reduced graphene oxide (RGO) on selected mechanical and functional properties of LDPE foils. The foils were made by blow extrusion, with different amounts of RGO added to the granules prior to the extrusion process. The mechanical properties of foil samples were assessed in a static tensile test, and their bacterial resistance was tested. The impact of RGO on antibacterial interactions and the desirable mechanical properties of the foils was analyzed. The results of this study supported the selection of the most advantageous solution for industrial applications.

Źródło:

Technical Sciences / University of Warmia and Mazury in Olsztyn; 2019, 22(4); 329-336
1505-4675
2083-4527

Pojawia się w:

Technical Sciences / University of Warmia and Mazury in Olsztyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Thermodynamic Phase Diagram and Phonon stability, Electronic and Optical Properties of FeVSb: A DFT study

Autorzy:

Bagheri, A.
Boochani, A.
Masharian, S. R.
Jafarpour, F. H.

Powiązania:

https://bibliotekanauki.pl/articles/2203753.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

DFT
thermodynamic phase diagram
phonon
electronic properties
optical properties

Opis:

Mechanical, electronic, thermodynamic phase diagram and optical properties of the FeVSb half-Heusler have been studied based on the density functional theory (DFT) framework. Studies have shown that this structure in the MgAgAs-type phase has static and dynamic mechanical stability with high thermodynamic phase consistency. Electronic calculations showed that this compound is a p-type semiconductor with an indirect energy gap of 0.39 eV. This compound’s optical response occurs in the infrared, visible regions, and at higher energies its dielectric sign is negative. The Plasmon oscillations have occurred in 20 eV, and its refraction index shifts to zero in 18 eV.

Źródło:

Archives of Metallurgy and Materials; 2023, 68, 1; 331--338
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 41.

Tytuł:

Effect of the Combined Heat Treatment and Severe Plastc Deformation on the Microstructure of Cunisi Alloy

Autorzy:

Głuchowski, W.
Rdzawski, Z.
Sobota, J.
Domagała-Dubiel, J.

Powiązania:

https://bibliotekanauki.pl/articles/351854.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

copper alloy
precipitation hardening
microstructure
mechanical properties
electrical properties

Opis:

The aim of this work was to study the microstructure and functional properties of CuNi₂Si₁ alloy. The material was prepared classically by melting, casting, hot rolling and cold rolling. The obtained strips were processed with combined operations of supersaturation, ageing and one of the intensive deformation method - repetitive corrugation and straightening. The efficiency of RCS operation in shaping of functional properties in precipitation hardened copper alloys depends not only on tool geometry and operating parameters but also on whether and at what stage of strip production the supersaturation operation was applied. Application of the supersaturation before RCS operation broadens the potential to shape the set of functional properties. Comparable functional properties of the precipitation hardened copper alloy strips can be reached without application of the supersaturation operation in their manufacturing processes. The process of RCS applied after annealing, and the potentially slightly lower mechanical properties would be compensated by higher electrical conductivity.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 2B; 1207-1214
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 42.

Tytuł:

Methods for Preparing Spheroidal Particles of 3-Nitro- 1,2,4-triazol-5-one (NTO)

Autorzy:

Lasota, J.
Chyłek, Z.
Trzciński, W. A.

Powiązania:

https://bibliotekanauki.pl/articles/358248.pdf

Data publikacji:

2015

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

NTO
recrystallization
properties

Opis:

This paper presents an overview of methods for recrystallizing 3-nitro- 1,2,4-triazol-5-one (NTO), with particular emphasis on methods for obtaining spheroidal particles with low porosity. The effects of selected solvents and surfactants on the recrystallization results was checked. Products in the form of spheroidal particles were obtained for some selected solvent-surfactant systems. The bulk density, surface area, size distribution, and sensitivity to friction and impact were tested for the spherical NTO samples and thermal analysis was also performed.

Źródło:

Central European Journal of Energetic Materials; 2015, 12, 4; 769-783
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Comparative study of sensor and material properties on In₀.₅₃Ga₀.₄₇As/InP fabricated by MBE and MOCVD

Autorzy:

Wolkenberg, A.
Przesławski, T.

Powiązania:

https://bibliotekanauki.pl/articles/378441.pdf

Data publikacji:

2006

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Elektronowej

Tematy:

sensor
magnetic properties

Opis:

We report the galvanomagnetic properties of Hall and magnetoresistor cross-shaped sensors with lateral dimensions 2x3 mm. The comparative study of epilayers fabricated by MBE and MOCVD are presented. The measured parameters of these devices gave an interesting insight into their behaviour at temperatures ranging from LHe to room temperature. The large changes of the galvanomagnetic parameters vs. magnetic field and temperature allow these devices to be used as field or temperature sensors.

Źródło:

Electron Technology : Internet Journal; 2005-2006, 37/38, 1; 1-9
1897-2381

Pojawia się w:

Electron Technology : Internet Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

The antiwear and extreme-pressure properties, and viscosity-temperature characteristics of the lubricants containing vegetable oil and AW/EP additives
Właściwości przeciwzużyciowe i przeciwzatarciowe oraz charakterystyki lepkościowo-temperaturowe kompozycji olej roślinny-dodatki AW/EP

Autorzy:

Rogoś, E.
Urbański, A.

Powiązania:

https://bibliotekanauki.pl/articles/187968.pdf

Data publikacji:

2016

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

vegetable oils
antiwear properties
antiscuffing properties
rheological properties
oleje roślinne
właściwości przeciwzużyciowe
właściwości przeciwzatarciowe
właściwości reologiczne

Opis:

The lubricating and rheological properties of compositions based on vegetable oil mixtures and selected additives were examined. The additives were dedicated both to vegetable oils as well as to petroleum products. The additives varied in chemical structure and the content of active elements. It was concluded that the nature of particular additives as well as their concentration in the composition significantly altered the initial lubricating and rheological properties of the base oil. The differences were diverse and highly dependent on the composition. The most beneficial effects were obtained when the additives containing phosphorus and nitrogen were added to the base oil.
Przedstawiono wyniki badań właściwości smarnych i reologicznych kompozycji olejowych wytworzonych na bazie mieszaniny olejów roślinnych z dodatkami smarnymi. Były to dodatki dedykowane olejom roślinnym oraz produktom naftowym. Dodatki różniły się strukturą chemiczną oraz zawartością pierwiastków aktywnych. Stwierdzono, że zarówno rodzaj, jak i stężenie dodatków zmieniły właściwości smarne i reologiczne oleju bazowego, przy czym zakres zmian jest zróżnicowany. Najkorzystniejsze działanie smarne i reologiczne wykazywał dodatek do olejów roślinnych zawierający fosfor i azot.

Źródło:

Tribologia; 2016, 269, 5; 159-169
0208-7774

Pojawia się w:

Tribologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Effect of molarity on the structural and optical properties of ZnO thin films deposit by CSP

Autorzy:

Habubi, Nadir F.
Abood, Ziad M.
Algamel, Ahmed N.

Powiązania:

https://bibliotekanauki.pl/articles/1193915.pdf

Data publikacji:

2015

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Urbach energy
ZnO
ZnO thin films
optical properties
structural properties

Opis:

ZnO thin films have been prepared by chemical spray pyrolysis technique CSP). XRD pattern reveals that the preferred orientation was varied with concentration, topography analysis was done by AFM micrograph which confirm the existence of nonstructural films. The optical properties was done by recorded the transmittane and absorbance which were affected by an increase in concentration. The values of optical energy gap obtained from Tauc relation were 3.17, 3.18 and 3.19 eV for 0.05, 0.1 and 0.5 M respectively. Urbach energy confirms the decrease in band tail as the concentration increase.

Źródło:

World Scientific News; 2015, 22; 55-69
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

New Active Packaging Films Made from Gelatin Modified with Fungal Melanin

Autorzy:

Łopusiewicz, Łukasz
Jędra, Filip
Bartkowiak, Artur

Powiązania:

https://bibliotekanauki.pl/articles/1177694.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Agaricus bisporus
antioxidant
barrier properties
gelatin
mechanical properties
melanin
packaging

Opis:

Fungal melanin was used to prepare gelatin-based composite films. The films of various melanin concentrations (0.1%, 0.5% and 1% w/w) were prepared using a solution casting method. The mechanical, antioxidant, antimicrobial, water vapor, oxygen and UV-Vis barrier properties, as well as any available surface polyphenolics were studied. FT-IR and Raman spectroscopy studies were carried out to analyse the chemical composition of the resulting films. The hydrophobocity, solubility, colour response, optical properties and opacity were also determined. The results of this study showed that the modification of gelatin with fungal melanin had no influence on mechanical and water vapor barrier properties, oxygen barrier properties were improved. The UV-Vis barrier properties of modified films were significantly improved. Modified gelatin films showed good antioxidant activity but were inactive against microorganisms. The modification with melanin caused changes in colour values, decreasing lightness and increasing the redness and yellowness of the films. Based on the results of this study, fungal melanin has good potential to be utilised as a value-added modifier that can improve the properties of gelatin films.

Źródło:

World Scientific News; 2018, 101; 1-30
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Właściwości mechaniczne i termiczne mieszanin poli(alkoholu winylowego) i elastyny
The mechanical and thermal properties of poly(vinyl alcohol)/elastin hydrolysates blends

Autorzy:

Skopińska-Wiśniewska, J.
Sionkowska, A.
Wieczorek, A.
Kozłowska, J.
Płanecka, A.

Powiązania:

https://bibliotekanauki.pl/articles/285948.pdf

Data publikacji:

2011

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

biomateriały
właściwości mechaniczne
właściwości termiczne
biomaterials
mechanical properties
thermal properties

Źródło:

Engineering of Biomaterials; 2011, 14, no. 109-111 spec. iss.; 29-31
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Comparative study on mechanical and bioactive properties of different nanopatterned TiO2 substrates

Autorzy:

Bartkowiak, Amanda
Zarzycki, Arkadiusz
Kąc, Sławomir
Perzanowski, Marcin
Marszałek, Marta

Powiązania:

https://bibliotekanauki.pl/articles/1844900.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nanostructures
mechanical properties
bioactive properties
nanostruktury
właściwości mechaniczne
właściwości bioaktywne

Źródło:

Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 63
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

The influence of cocamidopropyl betaine on the mechanical and thermal properties of polymer films

Autorzy:

Stachowiak, Natalia
Kowalonek, Jolanta
Kozłowska, Justyna

Powiązania:

https://bibliotekanauki.pl/articles/1844961.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

polymers
mechanical properties
thermal properties
polimery
właściwości mechaniczne
właściwości cieplne

Źródło:

Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 56
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Analiza zależności pomiędzy cechami dielektrycznymi a właściwościami chemicznymi mąki
Analysis of relationship between dielectric parameters and chemical properties of flour

Autorzy:

Łuczycka, D.
Romański, L.

Powiązania:

https://bibliotekanauki.pl/articles/292182.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

mąka
cechy dielektryczne
właściwości chemiczne
flour
dielectric properties
chemical properties

Opis:

Badania miały na celu analizę powiązań pomiędzy wybranymi cechami chemicznymi mąki (zawartość białka, glutenu, popiołu i skrobi), a właściwościami dielektrycznymi badanego materiału. Pomiary właściwości dielektrycznych prowadzono za pomocą automatycznego mostka RLC dla częstotliwości pola elektromagnetycznego 1 kHz. Na podstawie wyników pomiarów wyznaczono przenikalność dielektryczną oraz współczynnik strat dielektrycznych. Otrzymane wyniki poddano analizie statystycznej. Wartość współczynnika strat dielektrycznych oraz przenikalności dielektrycznej mąki zależy istotnie od zawartości glutenu oraz również skrobi i popiołu.
The research was aimed to carry out an analysis of relationships between selected chemical properties of flour (protein, gluten, ash and starch content) and dielectric parameters of the examined material. Dielectric parameters were measured using an automatic RLC bridge for electromagnetic field frequency 1 kHz. Measurement results allowed to determine permittivity and dielectric loss coefficient. Obtained results were analysed statistically. The value of dielectric loss coefficient and permittivity for flour significantly depends on gluten, starch and ash content.

Źródło:

Inżynieria Rolnicza; 2008, R. 12, nr 5(103), 5(103); 91-95
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Mechanical & Thermal Properties of Epoxy Based Hybrid Composites Reinforced with Jute / Sansevieria cylindrica Fibres

Autorzy:

Kumar, M. A.
Reddy, G. R.

Powiązania:

https://bibliotekanauki.pl/articles/411940.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

jute fiber
hybrid composites
mechanical properties
Sc fiber
thermal properties

Opis:

Tensile properties are studied to assess the influence of fiber weight. Room temperature cured epoxy was impregnated with jute/Sc in order to evaluate the performance of hybrid composites. Jute/Sc fibers are taken in the 1:1 weight ratios to suspend on epoxy resin with different fiber lengths such as 1, 2, 3 and 4 cm. The variations of aforementioned properties on hybrid composites with different fiber lengths have been studied. Significant improvement in tensile strengths of the jute/Sc hybrid composites has been observed by the alkali treatments. Thermal properties such as TGA and DSC are studied to investigate the influence of change in fibre length on treated and untreated hybrid composites in which 4 °C rise in decomposition temperature, 3 °C rise for glass transition temperature respectively.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 19, 2; 191-197
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Sandy Soil Reclamation Using Biochar and Clay-Rich Soil

Autorzy:

Thi, Diep Pham
Hang, Nga Nguyen Thi
Viet, On Tran
Van, Loc Nguyen
Viet, Anh Nguyen
Lan, Phuong Dinh Thi
Van, Nguyen Vu

Powiązania:

https://bibliotekanauki.pl/articles/1838287.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

sandy soil
biochar
clay-rich soil
physical properties
chemical properties

Opis:

The investigations on the effects of biochar application in improving the physio-chemical properties of soil have been carried out in many studies; however, there are very few studies on the combined use of both biochar and clay-rich soil for poor nutrient soil reclamation. Therefore, this study demonstrates improved water retention and nutrient retention of sandy soil by using biochar and biochar combined with clay-rich soil. The experiments were conducted on a small scale (greenhouse) with nine different application rates of biochar and clay-rich soil were mixed and then cultivated peanut, along with the drip irrigation technique using field moisture limit (about 70-80%) was applied under the condition of ensuring a sufficient supply of NPK for plant’s growth. The results showed that at the rates from 10.0-15.0% (w/w) clay-rich soil mixed with from 0.5-1.5% (w/w) of biochar applied to the tested sandy soil resulted in the positive effects on soil water holding, bulk density, permeability, pH, CEC, OM, total N, total P and peanut yield. The physical and chemical characteristics of the tested sandy soil have been improved by time and the application rate of 10.0% clay-rich soil and 0.5% biochar had the highest efficiency of pod fresh weight and pod dry weight during three studied seasons.

Źródło:

Journal of Ecological Engineering; 2021, 22, 6; 26-35
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Sandy Soil Reclamation Using Biochar and Clay-Rich Soil

Autorzy:

Thi, Diep Pham
Hang, Nga Nguyen Thi
Viet, On Tran
Van, Loc Nguyen
Viet, Anh Nguyen
Lan, Phuong Dinh Thi
Van, Nguyen Vu

Powiązania:

https://bibliotekanauki.pl/articles/1838394.pdf

Data publikacji:

2021

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

sandy soil
biochar
clay-rich soil
physical properties
chemical properties

Opis:

The investigations on the effects of biochar application in improving the physio-chemical properties of soil have been carried out in many studies; however, there are very few studies on the combined use of both biochar and clay-rich soil for poor nutrient soil reclamation. Therefore, this study demonstrates improved water retention and nutrient retention of sandy soil by using biochar and biochar combined with clay-rich soil. The experiments were conducted on a small scale (greenhouse) with nine different application rates of biochar and clay-rich soil were mixed and then cultivated peanut, along with the drip irrigation technique using field moisture limit (about 70-80%) was applied under the condition of ensuring a sufficient supply of NPK for plant’s growth. The results showed that at the rates from 10.0-15.0% (w/w) clay-rich soil mixed with from 0.5-1.5% (w/w) of biochar applied to the tested sandy soil resulted in the positive effects on soil water holding, bulk density, permeability, pH, CEC, OM, total N, total P and peanut yield. The physical and chemical characteristics of the tested sandy soil have been improved by time and the application rate of 10.0% clay-rich soil and 0.5% biochar had the highest efficiency of pod fresh weight and pod dry weight during three studied seasons.

Źródło:

Journal of Ecological Engineering; 2021, 22, 6; 26-35
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

The physical and mechanical properties of magnesium oxychloride cement-based materials

Autorzy:

Malinowski, S.
Jaroszyńska-Wolińska, J.

Powiązania:

https://bibliotekanauki.pl/articles/390576.pdf

Data publikacji:

2015

Wydawca:

Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej

Tematy:

magnesium oxychloride cement
polypropylene fibre
microsilica
mechanical properties
physical properties

Opis:

The aim of this paper was the examination of the physical-mechanical properties of Sorel cement-based material. In the experimental part the effect of polypropylene fibers (PP) and micro-silica on properties of composite materials were studied. The results show that addition of these modifiers increases compressive strength, waterproofing and resistance against corrosion. Increase of compressive strength was observed from both addition of PP and micro-silica. PP resulted in an increase in compressive strength of 0,72 MPa, whereas addition of micro-silica caused an increase of 17,5 % compared to pure Sorel’s cement. Improvement of water-tightness was observed in both additions of PP and micro-silica. Weight loss of samples with PP addition to the concrete after a 7-day bath in an aggressive solution of 5% HCl was less than about 20%.

Źródło:

Budownictwo i Architektura; 2015, 14, 4; 89-98
1899-0665

Pojawia się w:

Budownictwo i Architektura

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

The additive-subtractive process chain – a review

Autorzy:

Moehring, Hans-Christian
Maucher, Clemens
Becker, Dina
Stehle, Thomas
Eisseler, Rocco

Powiązania:

https://bibliotekanauki.pl/articles/2200258.pdf

Data publikacji:

2023

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

additive manufacturing
additive-subtractive process chain
functional properties
material properties

Opis:

In recent years, metal additive manufacturing developed intensively and became a relevant technology in industrial production of highly complex and function integrated parts. However, almost all additively manufactured parts must be post-processed in order to fulfil geometric tolerances, surface quality demands and the desired functional properties. Thus, additive manufacturing actually means the implementation of additive-subtractive process chains. Starting with the most relevant additive processes (powder-based PBF-LB, LMD-p and wire-based WAAM and LMD-w/WLAM), considering intermediate process steps (heat treatment and shot peening) and ending up with post-processing material removal processes (with defined and undefined cutting edges), this paper gives an overview of recent research findings with respect to a comprehensive scientific investigation of influences and interactions within the additive-subtractive process chain. This includes both the macroscopic geometric scale and the microscopic scale of the material structure. Finally, conclusions and future perspectives are derived and discussed.

Źródło:

Journal of Machine Engineering; 2023, 23, 1; 5--35
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Mechanical and thermal properties of commercial multilayer flexible plastic packaging materials irradiated with electron beam

Autorzy:

Oliveira, V. M.
Nogueira, B. R.
Ortiz, A. V.
Moura, E. A. B.

Powiązania:

https://bibliotekanauki.pl/articles/146772.pdf

Data publikacji:

2008

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

electron-beam radiation
multilayer packaging materials
mechanical properties
thermal properties

Opis:

The effects of electron-beam irradiation on mechanical and thermal properties were studied for two commercial multilayer structures of flexible food packaging. Both the laminated poly(ethylene terephthalate) (PET)/ low-density polyethylene (LDPE) and the coextruded LDPE/polyamide(PA)/LDPE structures were irradiated up to 120 kGy using a 1.5 MeV electron beam accelerator, at room temperature in the presence of air. Mechanical properties showed significant changes (p < 0.05), specially in sealability that was severely affected. Changes in mechanical properties were discussed in relation to the eight day and the six month period after irradiation. In addition, the DSC analysis six months after treatment showed that the fusion enthalpy of the PET/LDPE structure components increase for the LDPE from 10 kGy and decrease for the PET up to 120 kGy (p < 0.05). On the other hand, the LDPE/PA6/ LDPE presented increase in the LDPE and PA up to 120 kGy, except for LDPE at 10 and 15 kGy and PA at 5 kGy doses (p < 0.05). The effects of irradiation were less severe for the LDPE/PA6/LDPE than for the PET/LDPE. The electron-beam irradiation did not show advantageous results that could be of interest for commercial applications for the film industry, but brings important information about the packaging behavior for food producers who may decide to use irradiation as a form of cold pasteurization of their packed products.

Źródło:

Nukleonika; 2008, 53, suppl. 2; 141-144
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Modyfikacja właściwości fizyko-chemicznych i użytkowych paliwa rzepakowego
Modification of physical, chemical and functional properties of rapeseed fuel

Autorzy:

Jakóbiec, J.
Bocheńska, A.
Ambroziak, A.

Powiązania:

https://bibliotekanauki.pl/articles/289375.pdf

Data publikacji:

2011

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

biopaliwo
dodatki
właściwości fizykochemiczne
biofuel
additives
physical properties
chemical properties

Opis:

Przeprowadzono analizę wymagań normatywnych dla oleju rzepakowego i jego mieszanin w oparciu o opracowanie Ministerstwa Rolnictwa Bawarii - Niemcy. Zwrócono uwagę, że część składników nie została w pełni określona i mogą ulegać ciągłej zmianie zarówno w zakresie wartości liczbowej jak i metodyki badań. Badania laboratoryjne własne dotyczą oceny jakości wybranych właściwości fizykochemicznych oleju rzepakowego w oparciu o wprowadzenie dodatków w postaci paliw węglowodorowych takich jak: olej napędowy, benzyna U95 i etanol (bioetanol).
The research involved an analysis of normative requirements for rapeseed oil and its mixtures on the basis of a study completed by Bavarian Ministry of Agriculture - Germany. It has been observed that some of the ingredients have not been fully defined, and thus they may be subject to continuous changes in regard to both numerical value and research methodology. Own laboratory tests concern quality assessment of selected physical and chemical rapeseed oil properties, based on introducing additives in form of hydrocarbon fuels including: diesel oil, U95 petrol and ethanol (bioethanol).

Źródło:

Inżynieria Rolnicza; 2011, R. 15, nr 4, 4; 85-92
1429-7264

Pojawia się w:

Inżynieria Rolnicza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Effect of the Molecular Structure and Molecular Weight of Poly(Vinylidene Fluoride-Chlorotrifluoroethylene) Copolymers on the Characteristic Properties of TATB-based Composites

Autorzy:

Singh, Arjun
Sharma, Tirupati Chander
Kumar, Mahesh

Powiązania:

https://bibliotekanauki.pl/articles/1063037.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

poly(VDF-CTFE) copolymers
TATB
sensitivity
hermal properties
mechanical properties

Opis:

1,3,5-Triamino-2,4,6-trinitrobenzene (TATB) based composites with different molecular weights and molecular structures of poly(vinylidene fluoride-chlorotrifluoroethylene) (poly(VDF-CTFE) binder were studied to investigate their effect on the physical, thermal, mechanical and explosive properties. The poly(VDF-CTFE) with three different kinds of molecular weights (FKM1, FKM2 and FKM3 samples) and three different kinds of molar ratios of VDF and CTFE (FKM4, FKM5and FKM6) was chosen as the polymeric binder. The experimental results indicated that all of these kinds of TATB-based composites do not show any measurable changes in the particle density, detonation velocity and impact sensitivity. The thermal data revealed that weight loss occurs in two steps and, that the thermal stability deceases slightly with an increase in the molecular weight. On other hand, the weight loss occurred in a single step and the thermal stability increases slightly with an increase in the molar ratio of the CTFE to VDF monomer units. The adhesion properties between the two phases of TATB crystals and polymeric matrices rely on the properties of the interface, which is expressed in terms of the mechanical properties. The storage modulus decreases with increasing molecular weight. On other hand, an increase in the CTFE to VDF molar ratio in the poly(VDF-CTFE) binder remarkably improves the mechanical strength. FKM5-9505 shows a significant reduction in creep deformation and dramatically increases the elongation failure, compared to those of the FKM4-9505 sample. Finally, SEM observations clearly suggested that the coating of the polymer matrix onto the surface of the TATB crystals is clearly demonstrated.

Źródło:

Central European Journal of Energetic Materials; 2020, 17, 3; 428-450
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Investigations of structural, elastic, electronic, magnetic and transport properties of the Heusler compounds Zr₂PdZ (Z = Al, Ga, and In): FP-LAPW method

Autorzy:

Khelfaoui, F.
Boudali, A.
Bentayeb, A.
El Hachemi Omari, L.
Si Abderrahmane, Y.

Powiązania:

https://bibliotekanauki.pl/articles/1057963.pdf

Data publikacji:

2018-01

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

Heusler alloys
magnetic properties
transport properties
ab initio
electrical conductivity

Opis:

Structural, elastic, electronic, magnetic and thermoelectric properties of the Heusler compounds: Zr₂PdAl, Zr₂PdGa, and Zr₂PdIn are performed using generalized gradient approximation with exchange-correlation function of the Perdew-Burke-Ernzerhof. The elastic constants are calculated at P=0 GPa. From the obtained elastic parameters, it is inferred that these compounds, with the Hg₂TiCu-type structure, are elastically stable and ductile in nature. The calculated density of states, magnetic moments and band structure are also given. The band structures of these compounds reveal that all of them have almost half metallic character with the narrow indirect band gap in the minority spin channel that amounts to 0.36, 0.46, and 0.40 eV for Zr₂PdAl, Zr₂PdGa, and Zr₂PdIn, respectively. The total spin magnetic moments (M_{tot}) of the considered compounds are very close to integer value 3, which satisfies a Slater-Pauling type rule for localized magnetic moment systems M_{tot}=Z_{T}-18, where Z_{T}=21 is the number of valence electrons in the primitive cell. The thermoelectric properties of these materials are discussed on the basis of the Seebeck coefficients, electrical and thermal conductivity relative to relaxation time as a function of temperature, at the Fermi level, using the Boltzmann transport theory. After several browse in the literature, the obtained results are the first predictions of the physical properties for the inverse full-Heusler compounds Zr₂PdZ (Z = Al, Ga and In).

Źródło:

Acta Physica Polonica A; 2018, 133, 1; 157-163
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Physicochemical and thermophysical database (DAFIT) in the prospect of Java and data warehouse

Autorzy:

Bylicki, A.
Gorawski, M.

Powiązania:

https://bibliotekanauki.pl/articles/1941707.pdf

Data publikacji:

2000

Wydawca:

Politechnika Gdańska

Tematy:

physicochemical properties
thermophysical properties
database
data warenhouse
OLAP
data aggregation

Opis:

In this paper, we are discussing the meaning of DaFiT database for knowledge on physicochemical properties, methods of database access and graphical presentation. The paper presents the state of development of DaFiT database and concentrates on the application of the Java and DW technologies.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2000, 4, 1; 109-114
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

The influence of microstructure of fibrous PLA/PVA membranes on physicochemical and biological properties

Autorzy:

Dzierzkowska, Ewa
Żmuda, Przemysław
Ścisłowska-Czarnecka, Anna
Kornaus, Kamil
Stodolak-Zych, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/1844928.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

membranes
physical properties
biological properties
membrany
właściwości fizyczne
właściwości biologiczne

Źródło:

Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 52
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

The properties of Lightweight Stabilised Blockboard panels

Autorzy:

Roziņš, Rihards
Iejavs, Jānis
Jakovļevs, Vilnis
Spulle, Uldis

Powiązania:

https://bibliotekanauki.pl/articles/2010850.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna

Tematy:

Lightweight Stabilised Blockboard
physical properties
mechanical properties
high density fibreboard

Opis:

Lightweight Stabilised Blockboard (LSB) panel is a product newly introduced onto the market. Research was carried out to determine the main physical and mechanical properties of the panel and to evaluate the effect of panel direction and moisture content. LSB panels have wide potential for application in the furniture industry, door production, transport, and construction board production. Potentially LSB panels are lighter, with lower density and higher form stability than solid wood and conventional fibreboard, particle board, oriented strand board (OSB) and plywood. LSB panels produced from solid pine wood core and High Density Fibreboard (HDF) skins are found to have the following physical properties: average moisture content 8.6%; density 450 kg·m,-3; shrinkage coefficients 0.36% %-1 for thickness and 0.25%·%-1 for length and width; thickness swelling 6.3% after 24 hours’ immersion in water. The following mechanical properties were determined: internal bond 0.51 N mm-2; screw withdrawal resistance 1076 N from plane and 553 N from edge; bending strength 13.4 N mm-2; and modulus of elasticity in static bending 1754 N mm-2.

Źródło:

Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2020, 63, 206; 103-119
1644-3985

Pojawia się w:

Drewno. Prace Naukowe. Doniesienia. Komunikaty

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Biological and mechanical research of titanium implants covered with bactericidal coating

Autorzy:

Malisz, Klaudia
Świeczko-Żurek, Beata

Powiązania:

https://bibliotekanauki.pl/articles/2172010.pdf

Data publikacji:

2022

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nanometals
scanning electron microscopy
wettability
nanoindentation
antibacterial properties
mechanical properties

Opis:

Materials used in bone implants should not only be non- -toxic to the surrounding tissues, but also should promote osseointegration and minimize the risk of infection. Infections are a serious problem contributing to implantation failure. They are associated with pain, immobilization, and the necessity of reoperation. In extreme cases, they can lead to significant inflammatory changes in the bones, which, in turn, can lead to amputation and even death. After implantation, the surrounding tissues are damaged. In addition, implants are susceptible to bacterial colonization due to the lack of microcirculation. Therefore, scientists are working on antibacterial coatings to prevent the adhesion of bacteria before tissue regeneration. The paper concerns the biological and mechanical properties of titanium implants with an antibacterial coating. The Ti13Zr13Nb alloy samples were coated with hydroxyapatite (HAp) coatings using the electrophoretic deposition technique (EPD). Subsequently, the surface of the samples was modified with silver, copper, and nickel nanoparticles by the immersion method. Different titanium sample types (i.e. HAp-only and nanometals-enriched coatings) were placed in a bacterial solution for a period of one month. Each sample was examined using scanning electron microscopy (SEM), nanoindentation, nanoscratch, and contact angle tests. The significant amount of dead biofilm on the surface proves the effectiveness of antibacterial activity. The wettability assessment showed that the samples were hydrophilic. The conducted tests of mechanical properties indicate the heterogeneity of the coatings.

Źródło:

Engineering of Biomaterials; 2022, 25, 165; 17--22
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Microbiological Analysis of Coolant Used in Machining

Autorzy:

Józwik, Jerzy
Zawada-Michałowska, Magdalena
Budzik, Grzegorz
Legutko, Stanislaw
Kupczyk, Maciej Jan

Powiązania:

https://bibliotekanauki.pl/articles/2201920.pdf

Data publikacji:

2023

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

metalworking fluids
CNC machining
cooling properties
lubricating properties
microorganism
microorganisms

Opis:

The subject of microbiological tests of coolants presented in the work is the cutting fluid (emulsifying oil) of Fuchs ECOCOOL 68 CF3. The liquid was taken from the tanks of three different numerically controlled machines (Lasertec 65, MillTap 700, CTX beta 1250 TC), used with different intensity. The five most characteristic and popular media were used in the study: nutrient agar - plain, TSA medium (tryptone-soy-agar), medium with dichloran, rose bengal and chloramphenicol, Sabouraud agar with Chloramphenicol, Czapka agar. The incubation time was dependent on the type of microorganisms. After the specified time, the plates inoculated on the medium were subjected to visual observations and under the Leica DM 500 microscope. As a result of the observation, the following types of microorganisms (fungi and bacteria) were detected: Aspergillus Niger Tiegh, Candida Albicans, Saphylococcus Aureus, Micrococcus Luteus and Escherchia Coli and Citrobacter Freundia. The assessments were made in fixed periods. The results are presented as a function of the intensity of the use of cutting fluids. Microbiological analysis of machining fluids will allow for optimizing the time periods of using coolants and will also contribute to the protection of the operator's health and indirectly "extending the life cycle" of the technological machine.

Źródło:

Advances in Science and Technology. Research Journal; 2023, 17, 2; 206--214
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

The Development of Rapidly Solidified Magnesium – Copper Ribbons

Autorzy:

Pastuszak, M.
Cieślak, G.
Dobkowska, A.
Mizera, J.
Kurzydłowski, K. J.

Powiązania:

https://bibliotekanauki.pl/articles/958209.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

magnesium-based alloys
rapid solidification
microstructure
mechanical properties
corrosion properties

Opis:

The aim of the present work was to plan and carry out an experiment consisting of amorphization of industrial magnesium alloy WE 43 (Mg - 4 Y - 3 RE - 0.5 Zr) modified by the copper addition. Investigated alloy modified with 20% of copper was rapidly quenched with the use of melt spinning technique. The effects of cooling rate on the structure and properties of the obtained material were extensively analyzed. The structure and phase analysis of samples were examined using X-ray diffraction method (XRD) while the thermal stability of the samples was determined by differential scanning calorimetry (DSC). Microstructure observations were also conducted. The microhardness tests (HV_0.02) and corrosion resistance tests were carried out to investigate the properties of the material. Corrosion resistance measurements were held using a typical three-electrode system. As the result of the research, the effect of cooling rate on microstructure and properties of investigated alloy was determined.

Źródło:

Archives of Metallurgy and Materials; 2016, 61, 2B; 1083-1088
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Effect of Zr and Nb on the Electrical and Magnetic Properties of the Fe-Zr-Nb-B-Cu Alloy

Autorzy:

Noh, Junghyun
Park, Seungyeon
Hwang, Haejin
Lim, Kyoungmook

Powiązania:

https://bibliotekanauki.pl/articles/350932.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

soft magnetic
magnetic properties
amorphous alloy
nanocrystalline alloy
electrical properties

Opis:

The present study, aims to investigate the effect of minor Zr and Nb alloying on soft magnetic and electrical properties of Fe₈₆ (Zr_x Nb_1-x )7B₆ Cu₁ (x=1, 0.75, 0.5, 0.25) alloys. The investigated alloys were prepared through the melt spinning process. Within the examined compositional range (Nb up to 5.25 at%, respectively), the soft magnetic properties and electrical resistivity of the alloys continuously increase with increasing Nb content. However increasing the Nb content further decreases such properties. We could confirm the influence of ratio of Zr and Nb on grain growth and crystallization fraction during crystallization by using the soft magnetic properties and electrical properties.

Źródło:

Archives of Metallurgy and Materials; 2019, 64, 3; 879-882
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Structural and Electrical Properties of SnO₂:F Thin Films Prepared by Chemical Vapor Deposition Method

Autorzy:

Najafi, N.
Rozati, S.

Powiązania:

https://bibliotekanauki.pl/articles/1030319.pdf

Data publikacji:

2017-02

Wydawca:

Polska Akademia Nauk. Instytut Fizyki PAN

Tematy:

chemical vapor deposition
SnO₂:F thin films
structural properties
electrical properties

Opis:

Fluorine doped tin oxide (FTO) thin films were deposited onto glass substrate at different substrate temperatures by a simple and inexpensive method of air pressure chemical vapor deposition. The substrate temperature was kept constant at about 500°C as the optimum temperature, and air was used as both a carrier gas and the oxidizing agent. A very simple method of characterization were carried on to investigate the electrical and structural properties of the prepared thin films. The electrical parameters variations showed that these parameters vary with substrate temperature ranging from an insulator thin film to a highly conductive layer. X-ray diffraction also revealed the structure to be polycrystalline at higher temperatures compared to amorphous structure for lower temperatures.

Źródło:

Acta Physica Polonica A; 2017, 131, 2; 222-225
0587-4246
1898-794X

Pojawia się w:

Acta Physica Polonica A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Environmental factors influence milling and physical properties and flour size distribution of organic spelt wheat

Autorzy:

Warechowska, M.
Warechowski, J.
Skibniewska, K. A.
Siemianowska, E.
Tyburski, J.
Aljewicz, M. A.

Powiązania:

https://bibliotekanauki.pl/articles/298457.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

organic spelt
physical properties
mechanical properties
milling
particle size distribution
PSD

Opis:

Spelt grain harvested at four organic farms in Poland were assessed for physical and milling properties and flour size distribution. The spelt grain was diversified in relation to the majority of tested milling quality parameters. The environmental conditions had a significant impact on thousand kernel weight, vitreousness, PSI, kernel ash content, specific energy of milling and the particle size distribution of flour. The values of specific energy of milling, coefficient of grinding efficiency, rupture force and rupture energy in the spelt from the organic farms were significantly lower than common wheat. The highest spelt flour yield was obtained of kernels cultivated on ecological farm with semi-coherent and very dry soil was similar to that of common wheat; the milling yield of the spelt originating from other farms was by 9.5% to 12.7% less than from the wheat one. The greatest differences in PSD between the tested flours were detected for the values over 40 μm. The content of this fraction was determined in the range of app. 1% to almost 4.5%; the flour from common wheat contained app. 2.8% of this fraction.

Źródło:

Technical Sciences / University of Warmia and Mazury in Olsztyn; 2016, 19(4); 387-399
1505-4675
2083-4527

Pojawia się w:

Technical Sciences / University of Warmia and Mazury in Olsztyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Variability of selected macrostructure features, density and compression strength along the grain of “Tabórz” Scots pine wood (Pinus sylvestris L.)

Autorzy:

Wąsik, Radosław
Michalec, Krzysztof
Barszcz, Anna
Mudryk, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/342694.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna

Tematy:

pine
annual ring width
share of latewood
physical properties
mechanical properties

Opis:

The aim of the study was to determine the variability of annual ring width, share of latewood, density and compression strength along the grain of “Tabórz” Scots pine wood (Pinus sylvestris L.). The wood samples for examination were obtained from three trunks of 260-year-old Scots pines felled in the Sosny Taborskie Nature Reserve. In total, 106 samples were obtained, with cross-sectional dimensions of 20 × 20 mm and a length of 30 mm along the grain. The mean values for all tested wood samples were as follows: annual ring width 1.28 mm, share of latewood 28.9%, wood density 0.487 g·cm-3, and compression strength 47.3 MPa. The least variability within trees was found for wood density and compressive strength along the grain. Very high positive correlation was found between wood density and compressive strength, and high positive correlations were found between share of latewood and wood density and between share of latewood and compressive strength. To the authors’ knowledge, the results presented here are the first empirical data published concerning the features of wood macrostructure, density and compression strength along the grain of the Tabórz Scots pine, the trunks of which are considered a valuable timber in Europe.

Źródło:

Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2020, 62, 205; 171-182
1644-3985

Pojawia się w:

Drewno. Prace Naukowe. Doniesienia. Komunikaty

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

Collagen - structure, properties and application

Autorzy:

Owczarzy, Aleksandra
Kurasiński, Robert
Kulig, Karolina
Rogóż, Wojciech
Szkudlarek, Agnieszka
Maciążek-Jurczyk, Małgorzata

Powiązania:

https://bibliotekanauki.pl/articles/1844977.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

collagen
collagen structure
physicochemical properties
biological properties
DDS
physicochemical techniques
atelocollagen

Opis:

Collagen is the dominant component of the extracellular matrix of mammals. It occurs almost in all animal tissues. Collagen is a highly heterogeneous protein. The collagen protein family is characterized by great diversity in terms of structure, occurrence, and function. Up till now, 29 types of collagens proteins have been classified. The representation of individual types of collagen has certain common features. The most important property is the above-average mechanical strength that results directly from the spatial structure. Collagen is a building material for most tissues and organs. It also plays an important role in the process of cell growth and differentiation, which results from the specific structure of collagen fibers as well as their ability to adhere. The development of research techniques allowed to study in detail the molecular structure and properties of collagen. Therefore, collagen has become a subject of interest in many branches of science. Synthetic recombinant collagen fibers were developed as the basis of collagen biomaterials for medical applications, including implantology or gynecology. The specific structure of collagen also makes it applicable as a protein carrier in drug delivery systems (DDS), particularly in the treatment of cancer and genetic diseases. The use of tissue regenerative abilities and an interdisciplinary look at the properties of collagen and collagen-based biomaterials may constitute the future of medical development.

Źródło:

Engineering of Biomaterials; 2020, 23, 156; 17-23
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

The influence of ionizing radiation on the properties of starch-PVA films

Autorzy:

Abramowska, A.
Cieśla, K. A.
Buczkowski, M. J.
Nowicki, A.
Głuszewski, W.

Powiązania:

https://bibliotekanauki.pl/articles/147450.pdf

Data publikacji:

2015

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

starch
poly(vinyl alcohol)
films
ionizing radiation
mechanical properties
physicochemical properties

Opis:

The cornstarch: poly(vinyl alcohol) (PVA) films characterized by the alternating ratio of starch:PVA (100:0, 80:20, 60:40, 40:60, 20:80, and 0:100) and containing 30% of glycerol were prepared by solution casting. The films were irradiated with an absorbed dose of 25 kGy with gamma rays in a vacuum and with fast electrons in the air. The films characterized by a high content of starch appeared stiff, while the films characterized by a high content of PVA were highly flexible. The tensile strength and flexibility, as well as swelling and hydrophilicity, increased with the increase in the PVA content in the films. However, the tensile strength and wetting angle values achieved a minimum at an intermediate composition. It was found that irradiation enables to reduce hydrophilicity of the films accompanied by a decrease in their flexibility. No general conclusion concerning the effect of irradiation on tensile strength and swelling behavior can be derived. An increase in the homogeneity of the films and an increase in the compatibility of their components was found by scanning electron microscopy (SEM). Strong interactions of the starch and the PVA components were discovered by diffuse reflectance spectroscopy. Degradation was found to be the prevailing process occurring in the films under the infl uence of irradiation. The possible accompanying crosslinking is discussed in terms of the gel content in the samples. Creation of various oxidation products in the films characterized by the modified composition was observed under the influence of irradiation carried out in the air. Basing on the obtained results it can be supposed that the selected starch-PVA compositions might appear useful as packagings of the products predicted for radiation decontamination.

Źródło:

Nukleonika; 2015, 60, No. 3, part 2; 669-677
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Migration of Hazardous Components of Municipal Landfill Leachates into the Environment

Autorzy:

Popovych, Vasyl
Telak, Jerzy
Telak, Oksana
Malovanyy, Myroslav
Yakovchuk, Roman
Popovych, Nataliya

Powiązania:

https://bibliotekanauki.pl/articles/124784.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

hydrosphere
physical properties
chemical properties
leachates
water pollution
municipal solid waste

Opis:

The research on the physical and chemical properties of landfill leachates and migration of its hazardous components into hydrosphere and biosphere is a current problem in the global context. The object of the research is landscape-changing factors of the Lviv municipal landfill (Ukraine). It was defined that the largest part of oil products accumulates in the leachates at the south-western side of the landfill (23.6 mg/dm³) and it is 2.36 times higher than the value of the maximum permissible concentration (MPC) (10 mg/dm³); the most saline leachates with chlorides and sulfites are those accumulating at the foot and at the northwestern side; the phosphate content of the investigated leachate samples was the highest at the foot of the landfill and amounted to 12.8 mg/dm³, which exceeds the MPC (10 mg/dm³) by 1.28 times; high concentration of ammonium nitride was discovered in the leachates at the foot (76.1 mg/dm³) and at the northwestern side (46.3 mg/dm³), which exceeds the MPC (30 mg/dm³) by 2.53 and 1.54 times, respectively; the highest indicators of total iron are typical for basins nearby (at the foot – 68.2 mg/dm³, at the northwestern side – 56.3 mg/dm³) and exceed the MPC norms (2.5 mg/dm³) by 27.28 and 22.52 times, respectively. According to certain indicators, the content of hazardous components in the leachates, which accumulate at the foot and at the northwestern side, exceeds the MPC and is several times higher than in the natural basins at the distance of 800 and 1200 m.

Źródło:

Journal of Ecological Engineering; 2020, 21, 1; 52-62
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Effect of Tin Addition on the Degradability and Corrosion Properties of a New Zn-1.0 wt.% Mg Alloy

Autorzy:

Long, Zhouling
Lang, Haiyang
Ou, Jun

Powiązania:

https://bibliotekanauki.pl/articles/2174586.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Zn-1Mg alloy
mechanical properties
corrosion properties
degradability
hemolysis rate

Opis:

In this study, to investigate effects of tin addition on the microstructures and corrosion properties, Zn-1Mg-xSn (x = 1.0, 2.0 and 5.0 wt.%) ternary zinc alloys were prepared. The experimental results indicated that the Zn-1Mg-2.0 wt.% Sn alloy has the better mechanical properties compared with pure zinc and Zn-1Mg alloy. The tensile strength of the alloy material is 173.2±3.7 MPa, the yield strength is 120.7±2.4 MPa, the elongation is 5.64±0.08% and the hardness is 76.9±0.8 HV. The average degradation rate of the alloys immersion in SBF solution for 60 days is 0.16±0.03 mm/year, and the Zn-1Mg-2.0 wt.% Sn alloy hemolysis rate is only 0.81±0.02%. It is confirmed that the addition of tin is effective to improve the mechanical properties and degradation of Zn-1Mg alloy. It may be a candidate of the clinical application requirements of the degradable implant materials in orthopedics.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 4; 1209--1216
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Chemical, Physical, and Sensory Properties of Bread with Popped Amaranth Flour

Autorzy:

Chaquilla-Quilca, Guadalupe
Islas-Rubio, Alma Rosa
Vásquez-Lara, Francisco
Salcedo-Sucasaca, Lourdes
Silva-Paz, Reynaldo Justino
Luna-Valdez, Jesús Guadalupe

Powiązania:

https://bibliotekanauki.pl/articles/31341112.pdf

Data publikacji:

2024-05-14

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

Amaranthus caudatus
popped grains
pasting properties
bread physical properties
Flash profile

Opis:

This study investigated the effect of substitution of wheat flour with popped amaranth flour in bread formulation on the chemical, physical, and sensory characteristics of breads. The raw and popped amaranth grain flours of four Peruvian varieties: Oscar Blanco, Centenario, Taray, and Imperial, were characterised for chemical composition and pasting properties using Rapid Visco-Analyzer (RVA). Both types of amaranth flour had a high nutritional value, but the peak and final viscosity of popped amaranth flour were closer to the wheat flour. Breads were formulated with the popped amaranth flour, at four substitution levels of 0, 10, 20, and 30%. A significant increase in contents of protein (around 12%) and raw fiber (more than 100%), and a decrease in carbohydrate content (around 6%) in breads at the highest substitution level compared to wheat bread were observed. At this substitution level, the RVA profile parameters, specific volume, pore area, and colour coordinates (L*, a*, and b*) differed significantly. In the sensory analysis using Flash profile technique, consumers identified that the Taray and Imperial bread varieties at 10 and 20% substitution level were similar to the wheat bread. Adding popped amaranth flour to bread improved the nutritional value, ensuring good physical and sensory properties. Popped amaranth flour can, thus, be an alternative to wheat flour in the development of healthy bakery products.

Źródło:

Polish Journal of Food and Nutrition Sciences; 2024, 74, 2; 137-146
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Designing a Highly Energetic PCL-GAP-PCL-based PU Elastomer; Investigation of the Effect of Plasticizers on Its Properties

Autorzy:

Chizari, Mostafa
Bayat, Yadollah

Powiązania:

https://bibliotekanauki.pl/articles/358502.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

polyurethane elastomer
glycidylazide polymer
binder
energetic plasticizer
mechanical properties
thermal properties

Opis:

Glycidylazide polymer (GAP) has potential interest for the development of high-performance energetic propellants. Although GAP is a well-known and promising energetic polymer, propellants based on it suffer from poor mechanical and low-temperature properties. In order to improve the mechanical and thermal properties of GAP a promising idea would be the preparation of a tri-block copolymer of it with a polymer having good mechanical and thermal properties, such as polycaprolactone (PCL). In this work, we report a detailed investigation of the glass transition temperature (Tg) and viscosity of PCL-GAP-PCL samples incorporated with energetic plasticizers, BuNENA, TMETN, and BTTN. The results demonstrated that the Tg of PCL-GAP-PCL is influenced by the type of plasticizer. PCL-GAP-PCL was cured with TDI and a mixed curing system (IPDI/N100). The elastomer prepared with the mixing curing system showed excellent mechanical properties with 2.64 MPa and 138% elongation. The effects of the energetic plasticizers on the mechanical properties of the elastomer were investigated. Finally, the plasticized tri-block copolymer showed enhanced mechanical and thermal properties.

Źródło:

Central European Journal of Energetic Materials; 2019, 16, 1; 33-48
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Structural and Optical Properties of Fe₂O₃ - NiO mixed Thin Films Prepared by Chemical Spray Pyrolysis

Autorzy:

Mohmmed, N. J.
Habubi, M. N.

Powiązania:

https://bibliotekanauki.pl/articles/412381.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Fe2O3
spray pyrolysis technique
structural properties
optical properties

Opis:

Mixed Fe₂O₃ - NiO thin films have been prepared by chemical Spray pyrolysis technique onto glass substrate preheated to 450 °C. The thickness of thin films was found to be (400 ±20) nm. XRD measurements reveal that all the film exhibit polycrystalline hexagonal wrutzite with a preferred orientation along (104) plane for pure and 10 % and 20 % Ni, while for the rest the structure was amorphous. AFM analysis indicate a nanostructure for all the films. The optical energy gap was found to be increased from optical transitions seems to be direct and the optical energy gap seems to be increased from 2.5 to 2.69 eV as the percentage of NiO increase.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 14, 1; 65-85
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

Morphological and Physicochemical Properties of Basaltic Soils on a Toposequence in Ikom, South Eastern Nigeria

Autorzy:

Olim, D. M.
Afu, S. M.
Ediene, V. F.
Uko, I. E.
Akpa, E. A.

Powiązania:

https://bibliotekanauki.pl/articles/1078031.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Physico-chemical properties
basaltic soils
fertility status
management practices
morphological properties

Opis:

Three profile pits were sunk along a toposequence of basaltic soils in Ikom, Cross River State to determine their morphological and physicochemical properties. The profile pits were morphologically described and thirteen (13) soil samples were collected from different horizons of the profiles for physicochemical analysis. Morphologically, the soils were deep and well drained with no concretions. The colour of the surface soils varied between dark reddish gray (5YR4/2) and dark brown (7.5YR 3/2) to dark reddish brown (5YR 3/4), while that of the subsurface varied between red (2.5YR 4/6) to reddish brown (2.5YR 4/4). The soils had sub-angular blocky structure of different grades and classes with predominantly clayey texture in the Ap horizons and very gravelly clayey texture in the Crtg horizons. The chemical analysis revealed that exchangeable Ca2+ was the most dominant cation amongst the exchangeable bases. The soils were low in total nitrogen, organic carbon, available phosphorus and very high in base saturation. The study showed that the soils are moderately fertile and as such, a lot has to be done to improve their fertility status through the application of organic and inorganic fertilizers with good management practices such as mulching with crop residue after harvest, sowing of crops at low density per hectare, conservative tillage, strip cropping, crop rotation and shifting cultivation to ensure sustainable productivity.

Źródło:

World News of Natural Sciences; 2019, 22; 84-92
2543-5426

Pojawia się w:

World News of Natural Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Fabrication and Properties of Self-crimp Side-by-Side Bicomponent Filaments Composed of Polyethylene Terephthalates with Different Intrinsic Viscosity

Autorzy:

Xiang, Guodong
Hua, Hongjing
Gao, Qingwen
Guo, Jingwen
Zhang, Xuzhen
Wang, Xiuhua

Powiązania:

https://bibliotekanauki.pl/articles/2171980.pdf

Data publikacji:

2022

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych

Tematy:

polyethylene terephthalate
self-crimp
bicomponent filament
mechanical properties
shrinkage
crimp properties

Opis:

Self-crimp side-by-side bicomponent filaments (SBSBFs) were prepared via melt spinning using two kinds of polyethylene terephthalate (PET) with great disparity of intrinsic viscosity. The influence of the volume ratio on the surface morphology, crystallinity, crimping properties, mechanical properties and shrinkage properties of the bicomponent filaments was investigated using wide-angle X-ray diffraction, a differential scanning calorimetry (DSC), scanning electron microscope, etc. As the proportion of the low-viscosity component increases, the shrinkage in boiling water or hot air, as well as the shrinkage force and the sonic orientation factor of the bicomponent filaments decrease, and the DSC heating curves change from double peaks to a single peak. These phenomena should be ascribed to the high orientation and low crystallinity of the high-viscosity PET component and low orientation and high crystallinity of the low-viscosity PET component. Moreover, the crimp property of the bicomponent filament with a volume ratio of 50:50 is superior to those with other volume ratios.

Źródło:

Fibres & Textiles in Eastern Europe; 2022, 2 (151); 68--74
1230-3666
2300-7354

Pojawia się w:

Fibres & Textiles in Eastern Europe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

Investigation of Mechanical and Corrosion Properties of Al 7075/Garnet Metal Matrix Composites by Two-stage Stir Casting Process

Autorzy:

Sambathkumar, Mani
Navaneethakrishnan, P.
Sasikumar, K. S. K.
Gukendran, Rangasamy
Ponappa, K.

Powiązania:

https://bibliotekanauki.pl/articles/2049140.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Al 7075
Garnet
two-stage stir casting
mechanical properties
corrosion properties

Opis:

The impact of Garnet addition into the AL7075 aluminium matrix on the physical, mechanical and corrosion properties are studied in this research paper. Al 7075/garnet composites are fabricated by using two-stage stir casting method in different (0, 5, 10, 15) volume percentages. Photomicrograph of prepared samples revealed the uniform distribution of garnet reinforcement into the base matrix. The corrosion rate is calculated by potentiodynamic polarization method. The actual density is increased by around 1.2% for al 7075 / garnet (15%) composite as compared to base alloy. Micro hardness of al 7075 / garnet (15%) composite is raised by around 47 (34%) compare to as cast base matrix. Al 7075 / garnet (15%) composite tensile strength stood at 252 Mpa, which is 40% greater than the base alloy. Al 7075 / 15% garnet composites reduce around 97% of corrosion rate than the base matrix. Alloy elements influenced the corrosion than Garnet reinforcement.

Źródło:

Archives of Metallurgy and Materials; 2021, 66, 4; 1123-1129
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 80.

Tytuł:

Preparation of Ag nanoparticles-reinforced polyamide 6 nanocomposites by in situ polymerization and investigation of its properties

Autorzy:

Xu, Q.
Feng, X.
Liu, J.
Gong, P.

Powiązania:

https://bibliotekanauki.pl/articles/778762.pdf

Data publikacji:

2017

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

In-situ solution polymerization
Ag nanomaterials
nanocomposites
crystallization properties
mechanical properties

Opis:

Polyamide 6 (noted as PA6)/Ag nanocomposites were prepared by an in situ solution polymerization method. AgNO₃  was used as filler and was directly reduced to silver nanoparticles resulting in uniformly dispersed nanoparticles in the PA6 matrix. The thermal stability, crystallization, melting performance, and dispersion properties of the PA6/Ag nanocomposites were studied using transmission electron microscopy (TEM), thermogravimetric analysis (TG), differential thermal scanning calorimetry (DSC), X-ray diffraction (XRD), and polarized light microscopy (POM). Furthermore, the mechanical and tribological behaviors of as-prepared nanocomposites were evaluated using universal tensile testing, impact testing, and friction testing machines. The results show that Ag-nanoparticles are evenly dispersed in PA6 and decrease in size with increasing Ag content. Whereas the crystallinity increased with increasing Ag content, the crystallization temperature of the nanocomposites did not change significantly. However, the mechanical and tribological properties of the nanocomposites increased compared with pure PA6.

Źródło:

Polish Journal of Chemical Technology; 2017, 19, 4; 36-40
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Influence of Sterilization and Exposure to the Ringers Solution on Mechanical and Physicochemical Properties of Nitrocarburized 316 LVM Steel

Autorzy:

Kajzer, A.
Rabij, K.
Basiaga, M.
Nowińska, K.
Kaczmarek, M.
Borowski, T.
Wierzchoń, T.

Powiązania:

https://bibliotekanauki.pl/articles/356523.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

AISI 316LVM steel
nitrocarburizing process
mechanical properties
physico-chemical properties

Opis:

Studies on biocompatibility of AISI 316LVM steel indicate the need to eliminate the nickel from the surface and replace it with other elements of improved biocompatibility. Therefore, in the presented work selected physicochemical and mechanical properties of the diffusive nitrocarburized layer formed by plasma potential by means of an active screen made of the Fe-Cr-Ni were studied. In the paper we present results of microstructure and phase composition of the layers, roughness, and surface wettability, potentiodynamic pitting corrosion resistance, penetration of ions into the solution as well as mechanical properties. The studies were conducted for the samples of both mechanically polished and nitrocarburized surfaces, after sterilization, and exposure to the Ringer’s solution. Deposition of the nitrocarburized layer increased the contact angle, surface roughness, surface hardness, and corrosion resistance with respect to the polished surfaces. The nitrocarburized layer is a barrier against the ions release into the solution and sterilization and exposure to Ringer solution. The obtained results showed beneficial increase of both mechanical and electrochemical properties of the deposited layer, and thus the applicability of the proposed method of surface treatment of the 316 LVM steel for short-term implants after sterylization.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 3; 1257-1266
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Tuning the Charge Transfer and Optoelectronic Properties of 4,6-Di(Thiophene-2-YL)Pyrimidine via Oligocenothiophene Substitution

Autorzy:

Irfan, A.
Chaudhry, A. R.
Al-Sehemi, A. G.
Muhammad, S.
Jin, R.
Tang, S.

Powiązania:

https://bibliotekanauki.pl/articles/356638.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

organic semiconductors
oligocene
density functional theory
optoelectronic properties
charge transfer properties

Opis:

Five new derivatives of 4,6-di(thiophen-2-yl)pyrimidine (DTP) were designed by structural modification with the aim to tune the electro-optical and charge transfer properties. The effect of oligocene and oligocenothiophene incorporation/substitution was investigated on various properties of interests. The smaller hole reorganization energy revealed that compounds 1-5 might be good hole transfer contenders. The smaller hole reorganization energy of newly designed five DTP derivatives than the pentacene showed that prior compounds might be good/comparable hole transfer materials than/to that of pentacene. The computed electron reorganization energy of DTP derivatives 1-5 are 124, 185, 93, 95 and 189 meV smaller than the meridional-tris (8-hydroxyquinoline) aluminum (mer-Alq3) illuminating that electron mobility of these derivatives might be better/comparable than/to referenced compound.

Źródło:

Archives of Metallurgy and Materials; 2018, 63, 4; 1629-1636
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

A Review on Aluminium Hybrid Surface Composite Fabrication Using Friction Stir Processing

Autorzy:

Patil, Namdev A.
Pedapati, Srinivasa Rao
Mamat, Othman Bin

Powiązania:

https://bibliotekanauki.pl/articles/356892.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Friction Stir Processing
aluminium hybrid surface composite
mechanical properties
tribological properties

Opis:

Nowadays, Aluminium (Al) based hybrid surface composites are amongst the fastest developing advanced materials used for structural applications. Friction Stir Processing (FSP) has emerged as a clean and flexible solid-state surface composites fabrication technique. Intensive research in this field resulted in numerous research output; which hinders in finding relevant meta-data for further research with objectivity. In order to facilitate this research need, present article summarizes current state of the art and advances in aluminium based hybrid surface composites fabrication by FSP with in-situ and ex-situ approach. Reported literature were read and systematically categorized to show impacts of different types of reinforcements, deposition techniques, hybrid reinforcement ratio and FSP machine parameters on microstructures, mechanical and tribological characteristics of different Al alloys. Challenges and opportunities in this field have been summarized at the end, which will be beneficial to researchers working onsolid state FSP technique.

Źródło:

Archives of Metallurgy and Materials; 2020, 65, 1; 441-457
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 84.

Tytuł:

Effect of HNT on mechanical and thermal properties of polylactic acid/polypropylene carbonate blends
Wpływ HNT na właściwości mechaniczne i termiczne mieszaniny polikwas mlekowy/węglan polipropylenu

Autorzy:

Haneef, Intan Najwa Humaira Mohamed
Buys, Yose Fachmi
Shaffiar, Norhashimah Mohd
Shaharuddin, Sharifah Imihezri Syed
Hamid, Abdul Malek Abdul
Sabri, Mohd Faizul Mohd
Afifi, Amalina Muhammad

Powiązania:

https://bibliotekanauki.pl/articles/2088248.pdf

Data publikacji:

2021

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej

Tematy:

PLA
PPC
HNT
mechanical properties
thermal properties
właściwości mechaniczne
właściwości termiczne

Opis:

In this work, the influence of halloysite nanotubes (HNTs) on the mechanical and thermal properties of the polylactic acid/polypropylene carbonate (PLA/PPC 70/30) blend was studied. The HNT was incorporated into the PLA/PPC blend by melt mixing. It was found that addition of 2-6 wt % HNT successfully improved the tensile and flexural strength as well as the flexural and Young’s moduli of PLA/PPC blend, due to the reinforcing effect. Although the elongation at break decreases with increasing HNT content, its value is much higher than that of pure PLA. Moreover, the addition of HNT did not affect the miscibility of PLA and PPC, since two glass transition temperatures were observed in the DSC thermograms. However, a higher content of HNT may improve the compatibility between PLA and PPC as evidenced by the lower difference between the glass transition temperature of PPC and PLA and reduced crystallinity resulting in higher tensile strength of nanocomposites.
W pracy zbadano wpływ nanorurek haloizytowych (HNTs) na właściwości mechaniczne i termiczne mieszaniny polikwas mlekowy/węglan polipropylenu (PLA/PPC 70/30). HNT wprowadzono do PLA/PPC poprzez mieszanie w stanie stopionym. Stwierdzono, że dodatek 2-6% mas. HNT skutecznie poprawił wytrzymałość na rozciąganie i zginanie, a także moduł sprężystości przy zginaniu i moduł Younga mieszaniny PLA/PPC, jako efekt wzmacniający. Pomimo, że wydłużenie przy zerwaniu zmniejsza się wraz ze wzrostem zawartości HNT, to jego wartość jest znacznie większa niż w przypadku czystego PLA. Nie stwierdzono wpływu HNT na mieszalność PLA i PPC, ponieważ na termogramach DSC zaobserwowano dwie temperatury zeszklenia. Jednak większa zawartość HNT może poprawić mieszalność PLA i PPC, o czym świadczy mniejsza różnica między temperaturą zeszklenia PPC i PLA oraz mniejszy stopień krystaliczności, co skutkuje wiekszą wytrzymałościa na rozciaganie nanokompozytów.

Źródło:

Polimery; 2021, 66, 9; 459--465
0032-2725

Pojawia się w:

Polimery

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Petrographic characteristics of the north-western part of Kosovo

Autorzy:

Kutllovci, F.

Powiązania:

https://bibliotekanauki.pl/articles/88922.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

magmatism
metamorphism
microscope properties

Opis:

In the north – western part of Kosovo, the next lito stratigraphic units were separated: Palaeozoic (gneiss, mica schists, leucogneiss, amphibolite, quartzite), Jurassic (Serpentinised hazburgit, Schist serpentines with granitic intrusion, Basalts with dacite dykes, Dacite, Metamorphic sole (amphibolites), Supra ophiolite sedimentary mélange), Cretaceous (Valanginian basal conglomerates, Valanginian–Hauterivian silty – sandstone turbidity’s, Barremian–Aptian basal conglomerates, Barremian–Aptian silty – marl turbidity’s, Albian–Senomanian sandy – phillitic turbidites, Santonian sedimentary ophiolitic melange) Quaternary (alluvium, proluvium, slope wash, lower river terrace, higher river terrace, lacustrine, gravel and sand). The samples were taken from those rocks for chemical, geo-chemical and for the preparation of petrographic microscope properties. The analyses were completed at the certified laboratory of Geology-Mining Faculty (Polytechnic University of Tirana) – Geosciences Institute.

Źródło:

Mining Science; 2018, 25; 49-56
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 86.

Tytuł:

Bioceramic micro and nanoparticles as functional biological materials

Autorzy:

Parakhonskiy, B.
Saveleva, M.
Svenskaya, Y.
Ivanova, A.
Lengert, E.
Alebastrova, A.
Yashchenok, A.
Gorin, D.
Bukreeva, T.
Marchenko, I.
Douglas, T.
Skirtach, A.

Powiązania:

https://bibliotekanauki.pl/articles/284720.pdf

Data publikacji:

2017

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

calcium carbonate
biomaterials
properties

Źródło:

Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 77
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 87.

Tytuł:

Mechanical hysteresis tests for porcine tendons

Autorzy:

Liber-Kneć, A.
Łagan, S.

Powiązania:

https://bibliotekanauki.pl/articles/285696.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

tendons
hysteresis
viscoelastic properties

Źródło:

Engineering of Biomaterials; 2016, 19, 138; 55
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 88.

Tytuł:

In vitro evaluation of selected properties of new flow-type dental composite

Autorzy:

Pałka, K.
Wysocka, S.
Belcarz, A.

Powiązania:

https://bibliotekanauki.pl/articles/284113.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

dental composites
properties
restoration

Źródło:

Engineering of Biomaterials; 2016, 19, 138; 74
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 89.

Tytuł:

Antioxidant properties of bioactive food packaging with nanodiamonds

Autorzy:

Mitura, K.

Powiązania:

https://bibliotekanauki.pl/articles/284160.pdf

Data publikacji:

2017

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nanodiamonds
food
antioxidant properties

Źródło:

Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 85
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 90.

Tytuł:

New type of polymeric antybacterial coating containing metal nanoparticles

Autorzy:

Szczypiński, M.
Mitura, S.
Louda, P.
Slamborova, I.
Exnar, P.
Bartosik, A.
El-Mallul, A.
Karczemska, A.

Powiązania:

https://bibliotekanauki.pl/articles/284349.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

nanoparticles
coatings
antibacterial properties

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 103
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 91.

Tytuł:

On the Avez method and its generalizations

Autorzy:

Dawidowicz, Antoni L.

Powiązania:

https://bibliotekanauki.pl/articles/748344.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

Invariant measure, Ergodic properties.

Opis:

W niniejszej pracy przedstawione są twierdzenia dotyczące istnienia miar niezmienniczych ze szczególnym uwzględnieniem metody Aveza, której zastosowania były przedmiotem prac prof. Lasoty.
In this paper the method of construction of invariant measure are presented. Particularly the method of Avez is presented.This method was used by Professor Lasota.

Źródło:

Mathematica Applicanda; 2007, 35, 49/08
1730-2668
2299-4009

Pojawia się w:

Mathematica Applicanda

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

An experimental method for estimating the thermal diffusivity of building elements, depending on the resolution of temperature measurement

Autorzy:

Owczarek, Mariusz

Powiązania:

https://bibliotekanauki.pl/articles/132057.pdf

Data publikacji:

2019

Wydawca:

Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.

Tematy:

thermal diffusivity
physical properties

Opis:

Thermal diffusivity, also known as temperature equalization coefficient, is the basic parameter in the Fourier equation for non-stationary heat exchange. Its values are known for homogeneous materials with a specific composition. Building elements made of reinforced concrete, for example, have a heterogeneous structure. For such cases, table values from the literature may differ significantly from the specific object for in real constructions. More accurate thermal diffusivity values can be obtained from measurements for a given element. Since these are usually large sized elements, the measurement method should take into account the material in the entire volume of the element. Proposals for such a method based solely on temperature measurement at several depths in the sample were presented. It consists in solving the inverse problem assuming a polynomial solution of the Fourier equation. An attempt was made to validate the method through a numerical experiment. Temperature variability was simulated with one-dimensional flow in the wall with assumed thermal diffusivity. Then the value of this diffusivity was determined from the calculated temperatures. On the inside of the partition, a constant temperature was maintained and on the outside it changed periodically. The dependence of the error in the obtained diffusivity value on the precision of temperature results was analyzed. Depending on the precision of the calculations, a minimum relative error of 2 to 6 percent was obtained. With the help of the data presented in the article, conclusions can be drawn as to the conditions that must be met to determine the value of diffusivity in real measurements with the required accuracy. The obtained results indicate that this method is worth further research.

Źródło:

Modern Engineering; 2019, 1; 28-33
2450-5501

Pojawia się w:

Modern Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

The Effect of Sonication on Acoustic Properties of Biogenic Ferroparticle Suspension

Autorzy:

Józefczak, A.
Hornowski, T.
Król, A.
Molčan, M.
Leszczyński, B.
Timko, M.

Powiązania:

https://bibliotekanauki.pl/articles/176978.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

magnetosomes
sonication
ultrasonic properties

Opis:

Superparamagnetic iron oxide nanoparticles (SPION) synthesised chemically usually need the modification of the particle surface. Other natural sources of magnetic particles are various magnetotactic bacteria. Magnetosomes isolated from magnetotactic bacteria are organelles consisting of magnetite (Fe₃O₄) or greigite (Fe₃S₄) crystals enclosed by a biological membrane. Magnetotactic bacteria produce their magnetic particles in chains. The process of isolation of magnetosome chains from the body of bacteria consists of a series of cycles of centrifugation and magnetic decantation. Using a high-energy ultrasound it is possible to break the magnetosome chains into individual nanoparticles – magnetosomes. This study presents the effect of sonication of magnetosome suspension on their acoustic properties, that is speed and attenuation of the sound. Acoustic propagation parameters are measured using ultrasonic spectroscopy based on FFT spectral analysis of the received pulses. The speed and attenuation of ultrasonic waves in magnetosome suspensions are analysed as a function of frequency, temperature, magnetic field intensity, and the angle between the direction of the wave and the direction of the field.

Źródło:

Archives of Acoustics; 2016, 41, 1; 161-168
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 94.

Tytuł:

Przestrzenne zróżnicowanie obrotu nieruchomościami gruntowymi przeznaczonymi pod zabudowę mieszkaniową w ujęciu województw
The spatial diversification of turnoverof land properties intended for dwelling-houses building in the context of voivodeships

Autorzy:

Oleńczuk-Paszel, Anna
Sompolska-Rzechuła, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/424902.pdf

Data publikacji:

2013

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

turnover
land properties
classification

Opis:

In the article a quantitative and valuable structure of transactions of land properties has been analyzed, especially taking into consideration lands intended for a dwelling-houses building, in Poland, in the years 2009-2011. Using one of the multivariate analysis methods the analysis and the evaluation of the spatial diversification of the voivodeships with regard to the analyzed properties turnover were done. Statistical data came from the Central Statistical Office publication titled ”Properties turnover”. After the reduction of the initial set of diagnostic features with parametric method, the final set, which was a basis for the voivodeships’ classification, was obtained. Finally five classes of voivodeships similar with respect to the turnover of lands intended for a dwelling-houses building were obtained.

Źródło:

Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 4(42); 13-24
1507-3866

Pojawia się w:

Econometrics. Ekonometria. Advances in Applied Data Analytics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 95.

Tytuł:

Distribution of masses and presses on axles and wheels and vehicles’ properties

Autorzy:

Rybak, Piotr
Wiśniewski, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/242007.pdf

Data publikacji:

2019

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

car
mass
pressures
properties

Opis:

One of the most important parameters affecting traction properties as well as driving safety, especially with regard to vehicles with special purpose, is the distribution of wheel and axle loads on the ground. This issue should be taken into account during the process of creating new vehicles as well as during the modernization process. In the first case, it is quite simple because the mass distribution is shaped already in the design phase. In the second case, the problem is more complex, because with modernization solutions we enter an already existing structure. Modernization basically assumes improving the performance and capabilities of the vehicle with possibly small changes in its base structure. Thus, it imposes important boundary conditions. The article presents the methodology of measurement and selected results of measurements of mass distribution as well as wheel and axle loads of selected motor vehicles during their advanced modernization (STAR 266 cars to the version STAR 266M2 and Honker 2000 to the version Honker M-AX). Modernizations carried out by Autobox Innovations Ltd. Lim. Par are mainly focused on increasing the traction of vehicles, traffic safety, and driving comfort. Measurements were made at the above-mentioned company.

Źródło:

Journal of KONES; 2019, 26, 1; 141-146
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 96.

Tytuł:

Effect of Time Immersion of Thiourea on Structural and Optical Properties of CdS Deposited by SILAR

Autorzy:

Raid, A. Ismail
Nadir, F. Habubi
Kameran, Y. Qader

Powiązania:

https://bibliotekanauki.pl/articles/1178249.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

CdS
Optical Properties
SILAR

Opis:

Successive ionic layer adsorption and reaction (SILAR) technique was used to prepare (CdS) thin films on glass substrate, by changing the immersion time in thiourea solution. XRD patterns proved that the as deposited thin films were polycrystalline structure with an average crystallite size ranging from 14.1 nm to 5.6 nm depending on immersion time. The EDX confirm the existence of CdS. Scanning electron microscopy reveals that the deposited films have a nanorod structure.Atomic force microscopy has shown that the values of average roughness and the root mean square roughness increase upon increasing the immersion time. The transmittance spectra reveal that as the immersion time increase, the value of transmittance decrease.

Źródło:

World Scientific News; 2018, 91; 73-85
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 97.

Tytuł:

Synthesis of silver and gallium doped hydroxyapatites for potential antibacterial properties

Autorzy:

Pajor, K.
Zgadzaj, A.
Kolmas, J.

Powiązania:

https://bibliotekanauki.pl/articles/286143.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

hydroxyapatite
antibacterial properties
surgery

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 46
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 98.

Tytuł:

Assessment of mechanical and biological properties of sodium alginate/gelatine hydrogels dedicated for bioprinting prepared with the use of various solvents

Autorzy:

Przybyszewska, K.
Bartniak, M.
Sobczyk-Guzenda, A.
Grabarczyk, J.
Bociąga, D.

Powiązania:

https://bibliotekanauki.pl/articles/286245.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

hydrogels
bioprinting
biological properties

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 91
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 99.

Tytuł:

The effect of plasma treatment on surface physicochemical properties of chitosan/glucan/HA biomaterial

Autorzy:

Przekora, A.
Pawłat, J.
Terebun, P.
Kwiatkowski, M.
Ginalska, G.

Powiązania:

https://bibliotekanauki.pl/articles/283980.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

plasma
biomaterials
physicochemical properties

Źródło:

Engineering of Biomaterials; 2018, 21, 148; 9
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 100.

Tytuł:

Chitosan/β-1,3-glucan/HA bone scaffold possesses osteopromotive properties in vitro

Autorzy:

Przekora, A.
Ginalska, G.

Powiązania:

https://bibliotekanauki.pl/articles/284166.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów

Tematy:

osteoblasts
osteopromotive properties
biomaterials

Źródło:

Engineering of Biomaterials; 2016, 19, 138; 51
1429-7248

Pojawia się w:

Engineering of Biomaterials

Dostawca treści:

Biblioteka Nauki

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