Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "elemental composition" wg kryterium: Wszystkie pola


Tytuł:
Elemental composition and nutritional characteristics of spelt flours and wholemeals
Autorzy:
Sinkovič, L.
Tóth, V.
Rakszegi, M.
Pipan, B.
Powiązania:
https://bibliotekanauki.pl/articles/54104347.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
Spelt (Triticum spelta) is an ancient wheat that has become a popular raw material for bakery products in the last decade owing to its unique nutritional value. In this study, the elemental and nutritional characteristics were investigated in flours and wholemeals from eleven genetic resources of spelt. Hulled and cleaned spelt grains were analysed for thousand-grain weight (TGW), grain length, and grain width characteristics. Spelt flours and wholemeals were prepared in two laboratory mills and characterised for multi-element composition, protein, total arabinoxylan (TOT-AX) and water-extractable arabinoxylan content (WE-AX). A total of twelve elements belonging to macro- (K, P, Mg, S, Ca) and micro- (Na, Fe, Mn, Zn, Mo, Cu, Cr) elements were determined. The highest coefficient of variation was found for Zn, Na and Cu in flour and for Cr, Na and WE-AX in wholemeal. Proteins ranged from 13.3-21.1%, TOT-AX from 11.4-37.3%, and WE-AX from 4.3-8.0%. Highly significant differences between spelt genetic resources were found for WE-AX, S, Na and TKW and between fractions for all macroelements, Fe, Mn, Zn, Cu, TOT-AX and WE-AX. A very strong positive Pearson correlation (>0.80) between flour and wholemeal was found for P, Zn, WE-AX and four pairs of compositional traits (P-Cu, Zn-P, Zn-Cu, protein-S). The study showed that spelt wholemeal is a higher source of minerals (K, P, Mg, Fe, Mn, Zn) and dietary fibre (total arabinoxylans) compared to spelt flour.
Źródło:
Journal of Elementology; 2023, 28, 1; 27-39
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concentration and elemental composition of quasi-ultrafine particles in Upper Silesia
Autorzy:
Rogula-Kozłowska, Wioletta
Mach, Tomasz
Rogula-Kopiec, Patrycja
Rybak, Justyna
Nocoń, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/207750.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
q-UFA
PM
road traffic emissions
Upper Silesia
emisja z ruchu drogowego
Górny Śląsk
Opis:
The ambient concentrations and elemental composition of particles with aerodynamic diameters between 30 and 108 nm (quasi-ultrafine particles, q-UFP) were studied. The data came from 6 sites in Katowice and Zabrze, big cities in Upper Silesia, where particulate matter was sampled at urban background site and crossroads in Katowice and Zabrze, at highway in Katowice, and at urban road in Zabrze. The ambient concentrations of q-UFP and of 24 q-UFP-bound elements at these six sampling sites have been discussed in the paper. The q-UFP mass concentrations in Upper Silesia did not appear high, they were not higher than in other areas. The percentages of the total mass of the examined elements in the q-UFP mass suggest that in Upper Silesia, within a typical residential area, q-UFP consist mainly of primary matter. At the sites under strong influence of road traffic emissions, where the contributions of the examined elements to the q-UFP mass were small, most probably, carbonaceous matter and elemental carbon build the core q-UFP mass. The majority of the elements in q-UFP are anthropogenic. Clear effects of local PM sources can be seen on the ambient concentrations of q-UFP-bound Al, Si, S, Cl, K, Sc, Ti, V, Cd, Cr, Mn, Co, and Sb.
Źródło:
Environment Protection Engineering; 2019, 45, 1; 171-184
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the elemental composition of the artefacts from the Kosewo archaeological site
Autorzy:
Gójska, A.M.
Miśta, E.
Powiązania:
https://bibliotekanauki.pl/articles/1058171.pdf
Data publikacji:
2016-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.05.Bx
82.80.Ej
82.80.Dx
82.80.Ms
82.80.Pv
Opis:
The Migration Period on the present Polish territories is considered as a time of depopulation of Oder, Warta, and Vistula basins. The prerequisite for such assumption is lack of the archaeological finds in these regions. In contrast, on the Mrągowo Lake District and in the Lyna basin, one can find wealth of burial crematory equipped with items from the Roman period and made in the Germanic style. The analyses using the physics techniques gives an opportunity to the meeting of history with the contemporary times and the lost things may see the light of present day. The discovered artefacts may constitute a source of knowledge, which, after analysis, will be able to fill the gaps on the map of settlements in the Polish territories. The energy-dispersive X-ray fluorescence system was used to analyze the set of Polish archaeological artefacts found in an excavation in Masurian Lakes District. The compact X-ray tube developed in the National Centre for Nuclear Research (NCBJ) was used as an X-ray source in the system designed for the energy-dispersive X-ray fluorescence studies. The X-ray fluorescence spectra of the artefacts were registered with the Amptek SDD spectrometer and the concentrations of elements were determined. The measurements show that the X-ray system developed in NCBJ with transmission type X-ray tube and the Amptek SDD spectrometer is an effective tool for chemical composition analyses of archaeological objects and can be successfully applied in archaeometry.
Źródło:
Acta Physica Polonica A; 2016, 130, 6; 1415-1419
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Balanced fertilization designed on the basis of elemental composition of crops at flowering stage
Autorzy:
Łabuda, S.Z.
Powiązania:
https://bibliotekanauki.pl/articles/11044727.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
cereal
fertilization
elemental composition
crop
flowering stage
plant cultivation
pot experiment
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2005, 60; 217-227
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elemental Composition, Topography and Wettability of $Pb_{x}Sn_{1 - x}S$ Thin Films
Autorzy:
Tashlykov, I.
Turavets, A.
Gremenok, V.
Żukowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1366292.pdf
Data publikacji:
2014-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.Ps
06.30.Bp
Opis:
PbSnS thin films were prepared by hot-wall vacuum evaporation. The Rutherford backscattering technique was employed for the investigation of $Pb_{x}Sn_{1 - x}S$ thin films composition. With a help of atomic force microscopy the main stages in the development of the thin films were characterized. Contact angle measurements of water drop on $Pb_{x}Sn_{1 - x}S$ thin films have been conducted on our original setup.
Źródło:
Acta Physica Polonica A; 2014, 125, 6; 1339-1343
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermophysical properties and elemental composition of agricultural and forest solid biofuels versus fossil fuels
Autorzy:
Stolarski, M.J.
Rybczynska, B.
Krzyzaniak, M.
Lajszner, W.
Graban, L.
Peni, D.
Bordiean, A.
Powiązania:
https://bibliotekanauki.pl/articles/14077.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2019, 24, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of structural-geometric parameters and elemental composition of spherical VT20 alloy powders
Autorzy:
Duriagina, Z. A.
Filimonov, O. S.
Kulyk, V. V.
Lemishka, I. A.
Kuziola, R.
Powiązania:
https://bibliotekanauki.pl/articles/368582.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
spherical VT20 alloy powders
structural-geometric parameters
additive technologies
fluidity
bulk density
hydrodynamic radius
proszek sferyczny
technologie przyrostowe
płynność
gęstość objętościowa
promień hydrodynamiczny
Opis:
Purpose: Identification of structural-geometrical parameters, technological properties and elemental composition of spherical powders in a wide fraction range with respect to the VT20 alloy has been carried out. This is important for evaluating the optimum filling of a given volume by mixture of powders of different fractions during 3D printing. Design/methodology/approach: During the investigation of spherical Ti-alloy powders, a comprehensive approach was performed using Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Dynamic Light Scattering (DLS) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The surface morphology of the powders was studied on a Tuescan Vega 3 Scanning Electron Microscope. Using the Quantax energy dispersive spectrometer, element distribution maps were obtained and histograms of element distribution in the investigated powders were constructed. ICP-MS analysis was performed to clarify the elemental composition. DLS analysis using Malvern's Zetasizer Nano-ZS equipment allowed us to determine the functional parameters (hydrodynamic radius – Rh, zeta potential – z and specific conductivity) of particles of titanium alloy powder that indirectly indicate a tendency to form conglomerates. Findings: According to the microscopic examinations, the VT20 alloy powder consists of globular-shaped particles with the lamellar traces on their surfaces. The uniformity of the chemical element distribution within each fraction of the investigated powders was confirmed by EDS, and the full conformity of the powder fractions with the elemental composition of the VT20 alloy was confirmed by ICP-MS. The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. Research limitations/implications: The use of high sensitive investigation methods gives understanding of the mechanisms of fine structure formation and possibility to control the processes of powder coagulation in the stage of electrostatic interactions. Practical implications: The obtained results can be used for the formation of fine spherical particles of the powder, but at the same time, these technologies can be extended for the particles of non-spherical shape. Originality/value: The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. This, in turn, will improve powder melting during 3D printing. The measured zeta potential values allowed us to reveal mechanisms of fine structure formation and to control the processes of powder coagulation in the stage of electrostatic interactions.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2019, 95, 2; 49-56
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elemental composition and rough source apportionment of fine particulate matter in air in Cracow, Poland
Autorzy:
Samek, L.
Gdowik, A.
Ogarek, J.
Furman, L.
Powiązania:
https://bibliotekanauki.pl/articles/208112.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
elemental compositions
X-ray fluorescence method
source apportionment
source contributions
Cracow
metoda fluorescencji rentgenowskiej
Kraków
koncentracja pyłów zawieszonych
źródła emisji zanieczyszczeń
Opis:
Samples of PM2.5 fraction (particles with aerodynamic diameter ≤2.5 mu m) of air particulates were collected in winter 2011 and summer 2012 in Cracow, Poland. The concentrations of PM2.5 were 50 ±23 mu g/m3 (wintertime) and 16 ± 6 mu g/mV (summertime). The energy dispersive X-Ray fluorescence method was used for the determination of the concentrations of PM2.5-related elements. Principal component analysis and multilinear regression analysis were used to determine source contributions to ambient concentrations of PM2.5. In wintertime, the sources of air pollution were identified as municipal emission, steel and ferrous industry (49.2%), traffic (37.8%) and other, not identified sources (13%), whereas during summer, they were traffic (53%), steel and ferrous industry (18%), and not identified sources (29%).
Źródło:
Environment Protection Engineering; 2016, 42, 1; 71-83
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and Elemental Composition of Cerate-Zirconate Compound as-Prepared by a Sol-Gel Technique
Autorzy:
Osman, N.
Abdullah, N.
Ibarahim, N.
Hassan, O.
Powiązania:
https://bibliotekanauki.pl/articles/1400572.pdf
Data publikacji:
2015-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.16.Be
82.45.Aa
Opis:
Powder of $BaCe_{0.54}Zr_{0.36}Y_{0.1}O_{2.95}$ (BCZY) ceramics compound was synthesized by a modified sol-gel method using triethylenetetraamine, TETA as a chelating agent. The samples were dried and calcined at 325°C and 1100°C, respectively. The resulting powder properties were characterized using Particle Size Analyzer (PSA), Scanning Electron Microscope (SEM), X-Ray Fluorescence Spectroscopy (XRF) and Energy Dispersive X-Ray (EDX). At calcination temperature of 1100°C, the sample shows particles with high purity, spherical shape and a single particle size distribution in the range of 342-396 nm. XRF and EDX analysis revealed that the elemental composition of Ba, Ce, Zr and Y present in the sample is almost the same as the nominal stoichiometric composition of BCZY compound. Thus, TETA is one of the potential chelating agents that can be used to synthesize high purity and homogeneous spherically grained cerate-zirconate powders.
Źródło:
Acta Physica Polonica A; 2015, 127, 4; 931-933
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Humic substances elemental composition of selected taiga and tundra soils from Russian European North-East
Autorzy:
Abakumov, Evgeny
Lodygin, Evgeny
Beznosikov, Vasily
Powiązania:
https://bibliotekanauki.pl/articles/2046761.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fulvic acids
humic acids
Komi
Russian Arctic
soils
taiga
tundra
Źródło:
Polish Polar Research; 2017, 38, 2; 125-147
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies