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Tytuł:
New Approach to Non-Volatile Metal Ion Production Using Plasma Ion Source with Internal Evaporator
Autorzy:
Turek, Marcin
Droździel, Andrzej
Pyszniak, Krzysztof
Filiks, Janusz
Węgierek, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2206283.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
ion sources
ion implantation
ion beams
Opis:
A new approach to application the internal evaporator in an arc discharge ion source is presented, namely a crucible with a plug made of feeding substance. This solution is suitable especially for high-melting point metallic feeding substances. The ion source was tested using Ni and Cr. Basic ion source characteristics, i.e. dependences of ion current and discharge voltage on discharge and filament currents as well as on the external magnetic field flux density are shown and discussed in order to find optimal working conditions. The maximal ion currents were 18 μA for Ni+ and 38μA for Cr+. The stability of the ion current was also tested. It was proven that ion source is able to provide intense ion beam current long enough to perform irradiations with the fluence of ~5×1015 cm-2 confirming the usefulness of the design for ion implantation purposes.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 20--27
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Post acceleration of ions emitted from laser and spark - generated plasmas
Autorzy:
Torrisi, L.
Cavallaro, S.
Rosiński, M.
Nassisi, V.
Paperny, V.
Romanov, I.
Powiązania:
https://bibliotekanauki.pl/articles/146658.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
post ion acceleration
laser plasma
ion beam
ion implantation
Opis:
Pulsed lasers at intensities of the order of 1010 W/cm2 interacting with solid matter in vacuum, produce hot plasmas at high temperatures and densities. The charge state distributions of the plasma generate a high electric field, which induces high ion acceleration along the normal to the target surface. The high yield of the emitted ions can generate a near constant current by using repetitive pulses irradiating thick targets. In order to increase ion energy, a post-acceleration system can be employed by using acceleration voltages above 10 kV. Special ion extraction methods can be employed to generate the final ion beam, which is multi-ionic and multi-energetic, due to the presence of different ion species and of different charge states. In this article four different methods of post ion acceleration, employed at the INFN-LNS of Catania, at the IPPLM of Warsaw, at the INFN of Lecce and at the LPI of Moscow, are presented, discussed and compared. All methods are able to implant ions in different substrates at different depth and at different dose-rates.
Źródło:
Nukleonika; 2012, 57, 3; 323-332
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The modifications of the JYFL 6.4 GHz ECR ion source
Autorzy:
Koivisto, H.
Liukkonen, E.
Moisio, M.
Nieminen, V.
Suominen, P.
Powiązania:
https://bibliotekanauki.pl/articles/148664.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ECR ion source
ion beams
Opis:
A new JYFL 14 GHz ECRIS was completed in spring 2000 for the nuclear physics program at the Department of Physics, University of Jyväskylä (JYFL). The old JYFL 6.4 GHz ECRIS (built in 1990-1991) is now also available for the material physics experiments and for the research and development work of the ECR ion sources. During the last year remarkable modifications to the structure of the source have been undertaken. In the first phase, which was completed in fall 2001, the axial magnetic field was optimized using the old power supplies and the coils. The radial magnetic field was improved in spring 2002 by installing an iron cylinder around the hexapole permanent magnets. According to the measurements the improvement of about 25% to the radial magnetic field was achieved. The research work to improve the ion beam quality has been started.
Źródło:
Nukleonika; 2003, 48,suppl.2; 81-84
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An algorithm for the calculation of heavy ion ranges in SiO2
Autorzy:
Kabadayi, Ö.
Gümüs, H.
Powiązania:
https://bibliotekanauki.pl/articles/148433.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ion implantation
ion range
SiO2
Opis:
The heavy ion ranges in amorphous SiO2 have been calculated by using a technique based on solution of first order ODE’s. Br, Au, Hg, Bi, projectiles have been chosen as incident ion. Since the target is assumed to be amorphous, Bragg’s rule can be used to calculate electronic and nuclear stopping powers in the compound. Numerical solutions have been performed by using Fehlberg fourth-fifth order Runge-Kutta method. The results are compared with experimental data, as well as with the result of the Monte Carlo program SRIM and other standard procedures such as PRAL and WS [19]. It is found that the agreement between our method and the experiment is good and within 10%.
Źródło:
Nukleonika; 2003, 48, 3; 145-149
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recent ion measurements within the modified DPF-1000U facility
Autorzy:
Kwiatkowski, R.
Czaus, K.
Skladnik-Sadowska, E.
Sadowski, M. J.
Zaloga, D. R.
Paduch, M.
Zielinska, E.
Powiązania:
https://bibliotekanauki.pl/articles/148249.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
DPF-1000U facility
ion beams
ion energy spectra
ion pinhole images
Opis:
In this note we describe measurements of ion beams emitted along the z-axis of the DPF-1000U facility operated at 23 kV, 334 kJ, and with the initial deuterium pressure of 1.6–2 hPa. The DPF-1000U device was recently renewed and equipped with a dynamic gas-puff valve placed inside the inner electrode. The investigated ions were recorded by means of ion pinhole cameras equipped with solid state nuclear track detectors of the PM-355® (PADC) type. The energy spectra of ions were determined using a Thomson spectrometer placed on the symmetry axis at a distance of 160 cm from the electrodes outlets. The ion images recorded during discharges performed under different experimental conditions show that the ion beams have a complex structure, usually in the form of a central bunch and an annular stream composed of many micro-beams. Energies of the registered deuterons have been in the range of 30–700 keV, while the fast protons (which originated from the hydrogen remnants) had energies in the range of 300–850 keV.
Źródło:
Nukleonika; 2015, 60, 2; 297-302
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on spatial and energetic characteristics of the ion beams emitted in the PF - 360 discharges
Autorzy:
Kwiatkowski, R.
Skladnik-Sadowska, E.
Malinowski, K.
Sadowski, M. J.
Czaus, K.
Zebrowski, J.
Garkusha, I. E.
Powiązania:
https://bibliotekanauki.pl/articles/147918.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ion beams
PF-360 facility
ion pinhole images
Opis:
Experimental results are presented on the spatial structure and energetic characteristics of the fast ion beams produced by high-current discharges in a PF-360 device operated at the National Centre for Nuclear Research (NCBJ, Otwock/Świerk, Poland). The 105 kJ discharges were initiated at the initial deuterium pressure around p0 = 6 hPa and were powered from a 234 miF capacitor bank charged up to 30 kV. The spatial structure of the ion beams was recorded using pinhole cameras equipped with the solid-state nuclear track detectors of the PM-355 type, placed at two different angles (0 centigrade, 45 centigrade) relative to the discharge axis. The detectors were shielded by thin absorption filters made of pure Al foils of various thickness, which made it possible to record only ions with energies exceeding a chosen threshold value. Similarly as in other plasma focus (PF) experiments, energies of the emitted ions ranged from about 30 keV to about 3 MeV, i.e. they were much higher than the voltage applied to the electrodes. The recorded ion images showed a complex spatial structure of the fast ion beams, which consisted of many micro-beams of different energies. It is possible that these beams were emitted by various local micro-sources (e.g. plasma micro-diodes) the were formed inside the PF pinch column.
Źródło:
Nukleonika; 2012, 57, 1; 67-74
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inhibiting effect of citric acid on the floatability of serpentine activated by Cu(II) and Ni(II) ions
Autorzy:
Huang, Jun-wei
Zhang, Cheng-qiang
Powiązania:
https://bibliotekanauki.pl/articles/110224.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
copper ion
nickel ion
serpentine
floatation
activation
inhibiting
Opis:
The laboratory researches about the inhibiting effect of citric acid on the flotation performance of serpentine activated by Cu2+ and Ni2+ were carried out through micro flotation tests, zeta potential measurements, collector adsorption capacity measurements and solution chemistry analysis. The flotation results showed that Cu2+ and Ni2+ could remarkably activate the flotation of serpentine when the pH value was more than 6, however, this activation could be effectively weakened by adding citric acid. Zeta potential measurement and adsorption capacity measurement indicated that the presence of citric acid could prevent the adsorption of Cu2+ and Ni2+, and therefore reduce the adsorption amount of potassium butyl xanthate on serpentine surface. Furthermore, solution chemical analysis of the flotation system showed that copper hydroxide Cu(OH)2(s) and the nickel hydroxide Ni(OH)2(s) were the main component in the pH range of 9 to 10, which adsorbed onto serpentine surface and made it activated; while the citric acid could effectively prohibit the formation of these metal hydroxide in slurry so as to inhibit the activation impact.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 4; 960-968
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Progress in theoretical models of the ICRF mode conversion
Autorzy:
Kazakov, Y. O.
Powiązania:
https://bibliotekanauki.pl/articles/147690.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ICRF heating
ion-ion hybrid resonance
mode conversion
tokamak
Opis:
The technique of heating the plasma with the electromagnetic waves in the ion cyclotron range of frequencies (ICRF) has many important applications that may lead to improved performance of tokamaks. Recently the heating efficiency of the ICRF mode conversion scenarios characterized by a narrow power deposition profiles received much attention. This paper highlights progress in the theoretical models of the ICRF mode conversion that allowed to achieve a successful experimental realisation of these scenarios in present-day tokamaks.
Źródło:
Nukleonika; 2012, 57, 1; 31-35
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accelerators in materials research
Autorzy:
Turos, A.
Powiązania:
https://bibliotekanauki.pl/articles/147928.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
materials research
accelerators
ion beam modification
ion beam analysis
Opis:
Abstract Since at least forty years accelerators of charged particles no longer belong to nuclear physics exclusively. This is especially true for accelerators at energies below 1 GeV. The vast majority of accelerators in this energy range is used for materials research and medicine. In materials research the applications are principally twofold: modifications of solids and surface layer microanalysis. Two most important challenges for materials research at the beginning of XXI century as determined by the Materials Research Society are: development of materials able to repair human body and development of materials for new electronic devices able to cope with the enormous amount of information to be stored and transmitted. The role of accelerators with regard to the challenges of modern technology will be discussed.
Źródło:
Nukleonika; 2005, 50,suppl.3; 11-15
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of New Water Deoxidization Systems for Heat and Power Plants
Autorzy:
Shabliy, Tetyana
Gomelya, Mykola
Pohrebennyk, Volodymyr
Ivanenko, Olena
Nosachova, Yuliia
Powiązania:
https://bibliotekanauki.pl/articles/2025740.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
redoxite
deoxidation
ion exchange resin
ion exchange resin modification
Opis:
The analysis of water conditioning methods for closed water supply systems was carried out in the work. The expediency of using redoxites based on ion exchange materials to combat the corrosion processes in water recirculation systems by preliminary deoxidation of water was shown. Modified KU-2–8, Dowex Mac-3, AB-17–8, Dowex Marathon WBA, AMBERLITE IRA 96 ion exchange resins were used as deoxidizing materials.
Źródło:
Journal of Ecological Engineering; 2022, 23, 1; 193-205
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of metal separation process from synthetic hydrochloric acid leaching solution of spent lithium ion batteries by solvent extraction and ion exchange
Autorzy:
Nguyen, Viet Nhan Hoa
Lee, Man Seung
Powiązania:
https://bibliotekanauki.pl/articles/1446393.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
spent lithium-ion batteries
solvent extraction
ion exchange
separation
Opis:
Spent lithium-ion batteries (LIBs) are good secondary resources for recycle and reuse. To develop a process for the separation of Cu(II), Co(II), Mn(II), Ni(II) and Li(I) with high purity from spent LIBs and circumvent some drawbacks of the previous work, solvent extraction and ion exchange experiments were done in this work. The synthetic hydrochloric acid leaching solution of 3 M was employed. Compared to Aliquat 336 (N-Methyl- N, N, N-trioctyl ammonium chloride), extraction with Cyanex 301 (bis(2,4,4-trimethylpentyl) dithiophosphinic acid) led to selective extraction of Cu(II) over other metal ions. Employing ion exchange with TEVA-SCN resin can completely separate Co(II) over Mn(II). After adjusting the pH of Co(II) free raffinate to 3, Mn(II) was quantitatively extracted by the mixture of Alamine 336 (mixture of tri-octyl/decyl amine) and PC 88A (2-ethylhexyl hydrogen-2-ethylhexylphosphonate) with two stage cross-current extraction. The synthesized ionic liquid (ALi-CY) was used for complete extraction of Ni(II), whereas Li(I) remained in final raffinate. The metal ions in the loaded organic phase were completely stripped with the proper agents (5% aqua regia for Cu(II), 5% $NH_3$ for Co(II), weak $H_2SO_4$ solution for Mn(II) and Ni(II) stripping, respectively). The experimental results revealed that purity of the metal ions in stripping solution was higher than 99.9%. A flowsheet was suggested to separate metal ions from the HCl leaching solutions of spent LIBs.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 4; 1-17
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
R&D of ECR ion sources: news and perspectives
Autorzy:
Gammino, S.
Powiązania:
https://bibliotekanauki.pl/articles/148656.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ion source
plasma
Opis:
The future accelerators need ion beams with higher charge state and higher current. This demand will be met by the “third generation Electron Cyclotron Resonance Ion Sources” (ECRIS) which will make use of improved plasma confinement by means of higher magnetic field and of higher microwave frequency, thus boosting the performance of nowadays ECRIS operating at the frequency of 14 and 18 GHz. The possibility to obtain confining fields exceeding 4 tesla, by means of special design of NbTi superconducting magnets, open the way to a new operational domain, at the typical frequencies of gyrotrons, above 28 GHz, with plasma densities never achieved before in ECRIS (1013 cm–3 and higher). The test of SERSE at 28 GHz, confirming the theoretical frame on which the third generation ECR sources design is based, will be presented; a synthetic review of the new generation ECRIS is carried out, with a particular emphasis on the design of the GyroSERSE source. Finally, the scheme of an innovative hybrid source will be outlined and a short description of the ECLISSE (Electron Cyclotron Resonance ion source Coupled to a Laser Ion Source for charge State Enhancement) experiment is hereinafter presented.
Źródło:
Nukleonika; 2003, 48,suppl.2; 73-79
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inorganic constituents in surface runoff from urbanised areas in winter: the case study of the city of Brest, Belarus
Autorzy:
Bulskaya, I.
Volchek, A.
Powiązania:
https://bibliotekanauki.pl/articles/48193.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
snowmelt
surface run-off
inorganic compound
pollution
phosphate ion
nitrate ion
ammonium ion
chloride ion
urbanized area
winter
Brest region
Belorussia
Źródło:
Oceanologia; 2014, 56, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biochemistry of magnesium
Biochemia magnezu
Autorzy:
Pasternak, K
Kocot, J.
Horecka, A.
Powiązania:
https://bibliotekanauki.pl/articles/14627.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
magnesium
DNA repair process
enzyme
metabolic cycle
cellular respiration
calcium ion
ion transport
potassium ion
biochemistry
Opis:
Magnesium is essential for biochemical functions of cells. Since Mg2+ has a relatively low ionic radius in proportion to the size of the nucleus (0.86 versus 1.14 f A for Ca2+), it shows exceptional biochemical activity. Due to its physicochemical properties, intracellular magnesium can bind to the nucleus, ribosomes, cell membranes or macromolecules occurring in the cell’s cytosol. It is indispensable for the nucleus to function as a whole and for the maintenance of physical stability as well as aggregation of rybosomes into polysomes able to initiate protein synthesis. Mg2+ can also act as a cofactor for ribonucleic acid enzymes (ribozymes) capable of specifically recognizing and cleaving the target mRNA. As an essential cofactor in NER, BER, MMR processes, Mg2+ is required for the removal of DNA damage. An activator of over 300 different enzymes, magnesium participates in many metabolic processes, such as glycolysis, Krebs cycle, β-oxidation or ion transport across cell membranes. Mg2+ plays a key role in the regulation of functions of mitochondria, including the control of their volume, composition of ions and ATP production.
Magnez jest składnikiem niezbędnym dla zasadniczych funkcji biochemicznych komórki. Ponieważ Mg2+ ma relatywnie mały promień w stosunku do wymiarów jądra (0.86 i 1.14 A odpowiednio dla Mg2+ i Ca2+), wykazuje dużą aktywność biochemiczną. Dzięki właściwościom fizykochemicznym śródkomórkowy Mg2+ może wiązać się z jądrem komórkowym, rybosomami, błonami komórkowymi oraz makromolekułami cytosolu komórki. Magnez jest niezbędny dla funkcjonowania jądra komórkowego jako całości oraz utrzymania fizycznej stabilności i agregacji rybosomów do polisomów zdolnych do biosyntezy białka. Odgrywa on również rolą kofaktora katalitycznych cząsteczek RNA (rybozymów), odpowiedzialnych za specyficzne rozpoznawanie i fragmentację docelowego mRNA. Jako kofaktor w procesach: NER, BER, MMR, przyczynia się do usuwania uszkodzeń DNA. Magnez, będąc aktywatorem ponad 300 różnych enzymów, uczestniczy w przebiegu wielu szlaków metabolicznych, takich jak glikoliza, cykl Krebsa, β-oksydacja czy transport jonów poprzez błony komórkowe. Odgrywa on ponadto bardzo ważną rolę w regulowaniu funkcji mitochondriów, łącznie z regulacją ich wielkości, kompozycją jonów, a także bioenergetyką i regulacją produkcji ATP.
Źródło:
Journal of Elementology; 2010, 15, 3; 601-616
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of pH and ionic Al3 plus and Cu2 plus on the concentration of magnesium in Trifolium pratense L.
Wpływ pH oraz jonów Al3 plus i Cu2 plus na zawartość magnezu w Trifolium pratense L.
Autorzy:
Szerement, J.
Szatanik-Kloc, A.
Powiązania:
https://bibliotekanauki.pl/articles/35184.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
pH
aluminium ion
copper ion
magnesium concentration
Trifolium pratense
Opis:
The objective of the work was to determine the content of magnesium in plants of Trifolium pratense L. which grew in an environment contaminated with aluminium or copper. The growth and development of the plants was carried out in hydroponics, with strictly controlled composition and pH of the growth medium. Copper was added to the medium (as an additional application) in a solution of CuSO4·5H2O, and aluminium in the form of a solution of AlCl3, at concentrations of Al+3 and Cu+2 of 20 and 100 mg dm-3. The concentration of magnesium, aluminium and cooper was determined by means of a ICP sequential emission spectrometer D-820 Hilger Analytical (UK) in extracts from the roots and aboveground parts. Decreasing pH of the medium did not cause any statistically significant changes in the concentration of the metals studied. There was a significant increase in the concentration of aluminium and copper in roots and aboveground parts of Trifolium pratense L. and lower magnesium concentration for plants that were grown in an environment contaminated with Al+3/ Cu+2 at a concentration of 100 mg dm-3. In the lower concentrations of both stressors (20 mg dm-3) a decrease was noted in the level of magnesium in the whole plant, and a statistically significant increase in the concentration of aluminium and copper in the roots of Trifolium pretense L. In the aboveground parts of the plants that grew in me-dium supplemented with 20 mg dm-3 of Al+3/Cu+2, the increase of the concentration of these metals was not statistically significant.
Celem pracy było określenie zawartości magnezu w roślinach Trifolium praten-se L., które rosły w środowisku skażonym glinem lub miedzią. Wzrost i rozwój roślin prowadzono w hydroponice, przy ściśle kontrolowanym składzie i pH pożywki. Do pożywki dodano miedź, (jako dodatkową aplikację) w formie CuSO4·5H2O lub glin w formie AlCl3 w stężeniach 20 i 100 mg·dm-3. .Zawartość glinu , magnezu i miedzi w ekstraktach z korzeni i części nadziemnych oznaczono Emisyjnym Sekwencyjnym Spektrometrem ICP D-820 Hilger Analytical. Obniżenie pH pożywki nie wpłynę-ło istotnie na zmiany zawartości badanych metali. W badanych roślinach Trifolium pratense L, które rosły w środowisku skażonym Al+3/Cu+2 w stężeniu 100 mg·dm-3 stwierdzono istotny wzrost zawartości glinu i miedzi zarówno w korzeniach, jak i częściach nadziemnych oraz obniżenie zawartości magnezu. Przy niższym stężeniu obu stresorów (20 mg·dm-3), odnotowano spadek zawartości magnezu w całej roślinie i istotne zwiększenie zawartości glinu i miedzi w korzeniach Trifolium pratense L. Wczęściach nadziemnych roślin, które rosły w pożywce dodatkiem 20 mg·dm-3 jonów Al+3/Cu+2 , wzrost zawartości tych metali nie był statystycznie istotny.
Źródło:
Acta Agrophysica; 2013, 20, 3
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concurrent transport of reactive and non-reactive ions in undisturbed soil columns
Autorzy:
Korsunskaia, L.P.
Shein, E.V.
Pachepsky, Y.A.
Powiązania:
https://bibliotekanauki.pl/articles/24231.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
transport
reactive ion
soil heterogeneity
non-reactive ion
soil
Źródło:
International Agrophysics; 2004, 18, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calcium ions in the pig pineal gland - an ultracytochemical study
Jony wapniowe w szyszynce swini - badania ultracytochemiczne
Autorzy:
Lewczuk, B
Bulc, M.
Prusik, M.
Przybylska-Gornowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/14383.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
pig
pineal gland
calcium ion
ultracytochemical analysis
calcium ion distribution
Opis:
The aim of the study was to analyze the distribution of calcium ions in the pig pineal gland at the level of electron microscopy. The investigations were performed on the pineals obtained immediately after slaughter (performed between 11:30 and 12:00 a.m.) from 4-month-old gilts. The fixation procedures were conducted with the use of pyroantimonate, which reacted with calcium ions and formed electron dense precipitates. The precipitates were found both in the intercellular spaces and in cells - pinealocytes, gial cells, endothelial cells and fibroblasts. The precipitates were much more numerous in the intercellular spaces than in the cells. Amount and distribution of precipitates differed significantly between pinealocytes, therefore two types of cells were distinguished. The first type of pinealocytes included cells containing a small or moderate amount of precipitates. They were usually characterized by light or dark cytoplasm and large variability in number and structure of dense bodies. Pinealocytes classified to the second type possessed large or very large content of precipitates. These cells were characterized by electron dense cytoplasm and showed the presence of numerous dense bodies. In both types of pinealocytes, precipitates were present in the nucleus and in the cytoplasm. In nuclei, precipitates were numerous in nucleoplasma and rather infrequently noted between membranes of the nuclear envelope. In the cytoplasm deposits were found in mitochondria, vesicles and cisterns of smooth endoplasmic reticulum, in the Golgi apparatus and in cytosol. The amount of precipitates in glial cells, endothelial cells and fibrocytes was lower than in pinealocytes.
Celem pracy była analiza ultracytochemiczna rozmieszczenia jonów wapniowych w szyszynce świni domowej. Badano szyszynki pobrane bezpośrednio po uboju (wykonanym między godz. 11:30 a 12:00) od loszek w wieku ok. 4 miesięcy. Do utrwalania gruczołów zastosowano pyroantymonian potasu, co umożliwiło związanie jonów wapniowych w postaci elektronowo gęstych precypitatów, których rozmieszczenie określono za pomocą mikroskopu elektronowego. Precypitaty występowały w przestrzeni międzykomórkowej oraz w komórkach: pinealocytach, komórkach glejowych, komórkach śródbłonka naczyń włosowatych i fibrocytach. Zawartość złogów pyroantymonianu wapnia była znacznie większa w przestrzeni zewnątrzkomórkowej niż wewnątrz komórek. Ze względu na ilość i lokalizację precypitatów możliwe było wyróżnienie dwóch typów pinealocytów. Pierwszy z nich stanowiły komórki zawierające małą lub średnią ilość precypitatów. Komórki te charakteryzowały się elektronowo jasną lub elektronowo gęstą cytoplazmą, a skład ciałek gęstych był zróżnicowany pod względem ilościowym i jakościowym. Drugi typ pinealocytów stanowiły komórki z dużą lub bardzo dużą zawartością precypitatów. Najczęściej charakteryzowały się one elektronowo gęstą cytoplazmą oraz obecnością bardzo licznych ciałek gęstych. W obu typach pinealocytów precypitaty występowały zarówno w jądrze komórkowym, jak i w cytoplazmie. W jądrze stosunkowo liczne precypitaty o zróżnicowanych wymiarach stwierdzono w obrębie chromatyny, natomiast jedynie sporadycznie obserwowano je w przestrzeni między błonami otoczki jądrowej. W cytoplazmie precypitaty występowały w mitochondriach, pęcherzykach i cysternach siateczki śródplazmatycznej gładkiej, strukturach aparatu Golgiego oraz w cytoplazmie podstawowej. Zawartość precypitatów w komórkach glejowych, komórkach środbłonka oraz fibrocytach była znacznie mniejsza niż w pinealocytach.
Źródło:
Journal of Elementology; 2007, 12, 4; 335-346
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of platinum ions on the heavy metal ions in loessial soil. Part I: Copper ions
Autorzy:
Bojanowska, M
Jackowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/1449382.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
copper ion
soil
loess
soil property
metal ion
degraded ecosystem
anthropogenic ecosystem
platinum ion
heavy metal
Opis:
Studies on the possibilities of activating heavy metal ions by platinum ions in the soil have been undertaken. The present work gives results of research on the copper ions activated in loessial soil by the treatment with solutions containing platinum ions. Samples of podzolic soil developed from loess were collected from the horizon Ap (0-20 cm). The samples were treated with re-distilled water or with the same quantity of PtCl4 water solutions containing 2, 4, 20 mg of platinum ions. Soil reaction (pH) was measured after 1, 2, 3, 4, 5 and 6 months of incubation at 5 and 20 °C temperature. Copper ion content was determined in the filtrates using the technique of atomic absorption spectrometry. The amount of copper ions activated in the soil material depended on the soil reaction, temperature, quantity of platinum ions introduced and the time duration of the experiment.
Źródło:
Acta Agrophysica; 2001, 51; 181-187
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of o-phosphoserine [OPS] for the separation of peptides on immobilized copper ions
Wykorzystanie OPS w procesie rozdzialu peptydow na unieruchomionych jonach miedzi
Autorzy:
Karas, M
Powiązania:
https://bibliotekanauki.pl/articles/14435.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
o-phosphoserine
separation
peptide
immobilized copper ion
copper ion
metal ion
protein
diet component
bioactive peptide
Opis:
Recent research into the structure and properties of proteins and peptides as physiologically active diet components has spurred a new interest in the isolation and investigation of bioactive peptides of animal, plant and microbiological origin. The isolation and separation of protein and peptide mixtures requires advanced procedures. It usually involves a multi-stage separation process on chromatographic columns with various packing. Immo- bilised Metal Ion Affinity Chromatography (IMAC) is frequently used in the complex process of obtaining peptide fractions. Affinity Chromatography (IMAC) relies on the specific interactions between amino acids, their reactive groups in proteins and peptides and „transitory” metal ions, in particular Cu2+. Those ions are immobilised by the chelating compound on the bed, forming specific adsorbents which bind proteins and peptides. The aim of this study was to determine whether o-phosphoserine (OPS) can be used for the immobilization of copper ions on Sephadex G25 during the separation of peptides and proteins isolated from string beans. Frozen pods of dwarf, green-podded string bean cv. Fana were used in the study. Peptide were extracted from well-homogenized string bean pods with tris-HCl buffer (pH 7.5), from which high molecular weight proteins were isolated with methanol, acetone, 20% trichloroacetic acid and the Magnafloc M-22S cation flocculant. The protein and peptide content of the separated fractions was determined. The peptide content depended on the type of extract from which high molecular weight proteins were isolated. The results obtained by using OPS as a chelating agent in the separation of string bean can be recommended for analysis of plant peptides.
Rozwój nauki o strukturze oraz właściwościach białek i peptydów jako fizjologicznie aktywnych składnikach diety przyczynił się do wzrostu zainteresowania izolowaniem i badaniem bioaktywnych peptydów pochodzenia zwierzęcego, roślinnego i mikrobiologicznego. Izolowanie i rozdział mieszanin białek i peptydów wymaga zaawansowanej procedury. Stosuje się zazwyczaj kilkustopniowy rozdział na kolumnach chromatograficznych z różnym wypełnieniem. W tak skomplikowanym procesie otrzymywania frakcji peptydowych szerokie zastosowanie znalazła chromatografia powinowactwa na unieruchomionych jonach metali IMAC (Immobilized Metal Ion Affinity Chromatography). Chromatografia powinowactwa wykorzystuje specyficzne oddziaływania między aminokwasami oraz ich reaktywnymi ugrupowaniami w białkach i peptydach a jonami metali „przejściowych”, szczególnie zaś z Cu2+. Jony te są immobilizowane przez związek chelatujący na złożu, i w ten sposób stanowią specyficzne adsorbenty wiążące białka lub peptydy. Celem pracy było zbadanie przydatności OPS (o-fosfoseryny) jako czynnika unieruchamiającego jony miedzi na złożu w procesie rozdziału peptydów i białek wyizolowanych z fasoli szparagowej metodą IMAC. Materiałem do badań były mrożone strąki fasoli szparagowej karłowatej zielonostrąkowej, odmiany Fana. Peptydy i białka izolowano z fasoli szparagowej buforem Tris-HCl, z otrzymanego ekstraktu białka wysokocząsteczkowe wydzielono: metanolem, acetonem, 20% kwasem trichlorooctowym i kationowym flokulantem Magnafloc M-22S. W otrzymanych frakcjach oznaczono zawartość białka i peptydów. Peptydy obecne w fasoli szparagowej charakteryzowały się zbliżonym powinowactwem do jonów miedzi. Wykazano, że rozdział peptydów zależy w małym stopniu od właściwości czynnika zastosowanego podczas usuwania białek z ekstraktu. Przebieg rozdziału z wykorzystaniem OPS jako czynnika chelatującego w technice IMAC z powodzeniem może być stosowany do rozdziału peptydów z ekstraktów roślinnych.
Źródło:
Journal of Elementology; 2010, 15, 1; 101-110
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wiazanie jonow metali przez wybrane frakcje substancji zawartych w wytlokach owocow
Autorzy:
Nawirska, A
Oszmianski, J
Powiązania:
https://bibliotekanauki.pl/articles/825999.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
usuwanie jonow metali
jony olowiu
wiazanie jonow
jony miedzi
roztwory wodne
jony cynku
jony kadmu
polifenole
pektyny
jony metali
wytloki owocowe
owoce
metal ion removal
lead ion
ion binding
copper ion
aqueous solution
zinc ion
cadmium ion
polyphenol
pectin
metal ion
fruit pomace
fruit
Opis:
Celem pracy było określenie możliwości wiązania jonów wybranych metali (Cu2+ , Cd2+ , Pb2+ i Zn2+ )z roztworów wodnych przez frakcje zawarte w wytłokach z owoców aronii, gruszek, jabłek i dzikiej róży. Zbadano, w jakim stopniu analizowane frakcje wytłoków (polifenole, pektyny, hemicelulozy, celulozy i ligniny) wiążą jony poszczególnych metali ciężkich. W tym celu pozbawiono wytłoki kolejnych frakcji, a następnie poddano te wytłoki działaniu roztworów metali o stężeniach w zakresie od 4 do 10 g Me/m3. Stężenia jonów metali w roztworze wyjściowym oraz po 30 minutach kontaktu z wytłokami badano w temperaturze pokojowej przy pH w zakresie od 6,2 do 7,0. Następnie uzyskane wyniki przeliczano na 100 g frakcji. Pektyny były frakcją wiążącą największe ilości jonów miedzi, kadmu i cynku, natomiast polifenole wiązały najwięcej jonów ołowiu, wykazując równocześnie odmienne właściwości w porównaniu z pozostałymi frakcjami. Polifenole zawarte w wytłokach z aronii wiązały wszystkie badane jony, natomiast uzyskane z pozostałych wytłoków - jedynie jony ołowiu. Najgorzej wiążącą frakcją uzyskaną z wytłoków były ligniny. Frakcja celulozy była najbardziej zróżnicowana, wiązała jony metali w różnym stopniu, w zależności od tego, z jakiego rodzaju wytłoków była uzyskana. Otrzymane wyniki mogą być przydatne w komponowaniu mieszanek z wytłoków do usuwania jonów metali z roztworów wodnych.
The objective of the study was to determine the capacity of chokeberry, pear, apple and rosehip pomace fractions to bind four heavy metal ions of choice (Cu2+, Cd2+, Pb2+ and Zn2+) for their removal from aqueous solutions. The pomace fractions under analysis were polyphenols, pectin, hemicellulose, cellulose and lignin. The pomace samples were subjected to sequential modifications by removing successive fractions and thereafter exposed to heavy metals in solutions which varied in concentration from 4 to 10 g Me/m3. Metal ion concentrations were measured in the starting solution and after 30 minutes of exposure at room temperature and pH from 6.2 to7.0. The results obtained were calculated per 100 g of fraction. Of the fruit pomace fractions examined, pectin was found to bind the greatest amounts of copper, cadmium and zinc ions, whereas polyphenols showed the highest capacity for binding lead ions, and differed in properties from the remaining fractions. The polyphenols fraction of chokeberry pomace was capable of binding all of the investigated metal ions, but the polyphenols fractions of the other pomace types had the capacity to bind lead ions alone. The capacity of the cellulose fraction for heavy metal binding varied from one pomace type to another. The lignin fraction was found to be the least effective metal ion binder. The results of the study may be of utility in selecting the components of a pomace mixture for the removal of heavy metal ions from aqueous solutions.
Źródło:
Żywność Nauka Technologia Jakość; 2001, 08, 4; 66-77
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przegląd osiągów ogniw litowo – jonowych w odniesieniu do wymagań wynikających z zastosowania w samochodowych pojazdach elektrycznych
Performance overview of lithium-ion cells in relation to requirements resulting from electric vehicle application
Autorzy:
Torbus, B.
Meiniecke, T.
Tyrtania, R.
Powiązania:
https://bibliotekanauki.pl/articles/1196918.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
samochody elektryczne
bateria Li-Ion
badania osiągów ogniw
electric vehicles
Li-Ion batteries
Li-ion performance tests
Opis:
Constant electric vehicles sales growth forces unceasing development of cell technology required for constructing traction batteries, which are one of the most important components of the vehicle powered by electrical energy. Therefore, series of load test has been carried out in order to comparison of selected cells behavior in determined ambient conditions and load.These tests were to reflect extreme conditions in road vehicle, so obtained results may be helpful for electric vehicle cell selection.
Ciągły wzrost sprzedaży pojazdów elektrycznych wymusza nieustanny rozwój technologii ogniw potrzebnych do budowy baterii trakcyjnych, które są jednym z najistotniejszych komponentów samochodu zasilanego energią elektryczną. Wobec tego zdecydowano się na przeprowadzenie szeregu prób mających na celu porównanie zachowania wybranych ogniw w założonych warunkach otoczenia oraz obciążenia. Przeprowadzone próby miały odzwierciedlić skrajne warunki pracy ogniw w pojeździe samochodowym, dzięki czemu uzyskane wyniki mogą istotnie pomóc np. w doborze ogniwa do pojazdów elektrycznych.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2018, 3, 119; 59-64
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of thioester type of broom extractant with silver selectivity
Autorzy:
Furugou, H.
Ohto, K.
Kawakita, H.
Harada, H.
Inoue, K.
Powiązania:
https://bibliotekanauki.pl/articles/346979.pdf
Data publikacji:
2007
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:
broom type extractant
tripodal compound
silver ion
extraction
ion selectivity
Opis:
A novel tripodal thioester type of broom extractant has been synthesized to investigate selectivity for soft metal ions. Broom extractant exhibited high extractability for silver ion compared with monopodal compound. The complexation ratio of the broom extractant and silver ion was found to be 1:1 from the result of extractant concentration dependency. For stripping of loaded silver ion, complete stripping was achieved with both 1 mol dm-3 thiourea and high concentration of acidic solutions. As an application, electrode response of silver ion was observed at concentration range of 10-3 to 10-6 M silver nitrate using broom extractant as an ionophore.
Źródło:
Ars Separatoria Acta; 2007, 5; 68-75
1731-6340
Pojawia się w:
Ars Separatoria Acta
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of quartz flotation from decarburized vanadium bearing coal
Autorzy:
Ren, L.
Zhang, Y.
Bian, Y.
Liu, X.
Liu, C.
Powiązania:
https://bibliotekanauki.pl/articles/110937.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mica
vanadium-bearing coal
flotation
quartz
ion dissolution
calcium ion
Opis:
Ether diamine (Fm 2835-2L) was used as a collector for flotation of quartz. It allows flotation of quartz from mica and calcite. The adsorption mechanism of Fm 2835-2L on quartz was investigated by flotation tests, zeta-potential measurements and infra-red (FTIR) spectra measurements. Results show that Fm 2835-2L adsorbs on the quartz surface in physical adsorption with no new products, changing its zeta potentials, and increasing its hydrophobicity. The effect of calcium ions on flotation of quartz was investigated by flotation tests and zeta-potential measurements. Results show that under neutral or weakly acidic conditions calcium cation can adsorb onto the surfaces of quartz, increase the zeta potential of quartz particles, which in turn causes weaker aggregation of quartz particles and lower flotation recovery of quartz. Under the alkaline conditions the hydrolytic components of calcium are also adsorbed on the quartz surface and increase the zeta potential of quartz particles, which causes stronger aggregation of quartz particles and higher flotation recovery of quartz. However, the hydrolytic components such as CaOH+, Ca(OH)2(aq) and Ca(OH)2(s) were not formed in significant amounts in the best flotation tests.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 2; 755-767
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Suppressing of Co-Extracted Electrons in a Negative Ion Source-Numerical Simulation
Autorzy:
Turek, Marcin
Węgierek, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2201879.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
particle-in-cell simulations
negative ion source
ion beam extraction
Opis:
Electron co-extraction and suppression by a transverse magnetic fields is studied within a two dimensional particle-in-cell numerical model of surface ionisation ion source with beveled extraction opening. A novel approach of data presentation is proposed, based on the fact that dependences of co-extracted current on the filter strength could be approximated by four parameters only, describing e.g. initial electron current value and cut-off B value. In the paper the influence of extraction system geometry is considered – it is shown that the cut-off B value increases with the size of the opening in the extraction electrode, while the inclination of the extraction opening walls does not play any significant role. It is demostrated that the most of electron is eliminated by hiting the extraction electrode walls, however up to 30 % of electrons were lost by encountering the extraction channel walls due to the modification of their trajectories by the filter field. The influence of the magnetic filter field placement is also investigated – the center of the filter field has to be no further than 2 mm form the extraction channel orifice in order to achieve minimal values of the cut-off field (~20 mT). The possibly low extraction voltages are preferable, as the ammount of co-extracted electrons grows rapidly with Vext resulting in e.g. threefold increase of cut-off parameter value when extraction voltage is changed from 1 kV up to 10 kV. Within the considered model the filter field does not have any significant influecne on extracted H- current.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 1--10
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recent development in ECR sources
Autorzy:
Bieth, C.
Kantas, S.
Sortais, P.
Kanjilal, D.
Rodrigues, G.
Powiązania:
https://bibliotekanauki.pl/articles/148676.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ion source
ECR source
superconducting coils
high temperature superconducting wires
high charge state ion source
ion implantation
Opis:
Recent developments and improvements on the ECR ion source family at PANTECHNIK S.A. are presented. A lot of work has been done in the Ion Implantation Technology with the MICROGAN IndustryŽ source: more than 3 mA have been produced on B1+, P1+ and few hundred žAe on charge state 3+, 4+. Three other developments are described in this paper: a) the construction of the first source using high temperature superconducting coils (30 K) PKSUSŽ - Space Cryomagnetics (UK), in collaboration with NSC (New Delhi); b) the construction of the PHOENIX ECR source (used in the “1+/n+” process for radioactive beam) for different laboratories; c) and the first results on PK 2.45 (a cheap source working at 2.45 GHz) able to produce high current of monocharged beam. We will also present some special products for beam acceleration and diagnosis.
Źródło:
Nukleonika; 2003, 48,suppl.2; 93-98
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meconium samples used to assess infant exposure to the components of ETS during pregnancy
Autorzy:
Narkowicz, Sylwia
Polkowska, Żaneta
Kiełbratowska, Bogumiła
Namieśnik, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/2177039.pdf
Data publikacji:
2015-10-14
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
environmental tobacco smoke
infant exposure
meconium
saliva
ion chromatography
thiocyanate ion
Opis:
Objectives: The aim of the study was to use meconium samples to assess fetal exposure to compounds present in environmental tobacco smoke (ETS). Material and Methods: In order to assess fetal exposure to toxic tobacco smoke compounds, samples of meconium from the offspring of women with different levels of tobacco smoke exposure, and the samples of saliva from the mothers were analyzed. Thiocyanate ion as a biomarker of tobacco smoke exposure, and other ions that are indices of such exposure were determined by means of ion chromatography. Results: The results of ion chromatography analysis of the meconium and maternal saliva samples for the presence of cations and anions (including thiocyanate ion) indicate that the concentration level of specific ions depends on the intensity of environmental tobacco smoke exposure of pregnant women. Conclusions: Based on the results, it can be concluded that meconium samples can be used to determine the substances from tobacco smoke. The results confirm the effect of smoking during pregnancy on the presence and content of substances from tobacco smoke.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 6; 955-970
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leakage Current Degradation Due to Ion Drift and Diffusion in Tantalum and Niobium Oxide Capacitors
Autorzy:
Kuparowitz, M.
Sedlakova, V.
Grmela, L.
Powiązania:
https://bibliotekanauki.pl/articles/221515.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
niobium oxide capacitors
tantalum capacitors
leakage current
ion diffusion
ion drift
Opis:
High temperature and high electric field applications in tantalum and niobium capacitors are limited by the mechanism of ion migration and field crystallization in a tantalum or niobium pentoxide insulating layer. The study of leakage current (DCL) variation in time as a result of increasing temperature and electric field might provide information about the physical mechanism of degradation. The experiments were performed on tantalum and niobium oxide capacitors at temperatures of about 125°C and applied voltages ranging up to rated voltages of 35 V and 16 V for tantalum and niobium oxide capacitors, respectively. Homogeneous distribution of oxygen vacancies acting as positive ions within the pentoxide layer was assumed before the experiments. DCL vs. time characteristics at a fixed temperature have several phases. At the beginning of ageing the DCL increases exponentially with time. In this period ions in the insulating layer are being moved in the electric field by drift only. Due to that the concentration of ions near the cathode increases producing a positively charged region near the cathode. The electric field near the cathode increases and the potential barrier between the cathode and insulating layer decreases which results in increasing DCL. However, redistribution of positive ions in the insulator layer leads to creation of a ion concentration gradient which results in a gradual increase of the ion diffusion current in the direction opposite to the ion drift current component. The equilibrium between the two for a given temperature and electric field results in saturation of the leakage current value. DCL vs. time characteristics are described by the exponential stretched law. We found that during the initial part of ageing an exponent n = 1 applies. That corresponds to the ion drift motion only. After long-time application of the electric field at a high temperature the DCL vs. time characteristics are described by the exponential stretched law with an exponent n = 0.5. Here, the equilibrium between the ion drift and diffusion is achieved. The process of leakage current degradation is therefore partially reversible. When the external electric field is lowered, or the samples are shortened, the leakage current for a given voltage decreases with time and the DCL vs. time characteristics are described by the exponential stretched law with an exponent n = 0.5, thus the ion redistribution by diffusion becomes dominant.
Źródło:
Metrology and Measurement Systems; 2017, 24, 2; 255-264
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of Al(III) and Fe(III) ions on the flotation behavior of Kfeldspar with sodium oleate as the collector
Autorzy:
Chen, Yi
Zhou, Jikui
He, Guichun
Hu, Hongxi
Liu, Chao
Yang, Jiping
Lyu, Xianjin
Powiązania:
https://bibliotekanauki.pl/articles/27323648.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
K-feldspar flotation
aluminum ion
iron ion
sodium oleate
action mechanism
Opis:
The present study investigates the effects and mechanisms of aluminum (Al(III)) and iron (Fe(III)) ions on the flotation efficiency of potassium feldspar (K-feldspar) within oleate collector systems. The study employs micro-flotation experiments, solution chemistry calculations, zeta potential measurements, and FT-IR and XPS analyses to demonstrate that Al(III) and Fe(III) ions can significantly improve the flotation recovery of K-feldspar by altering its surface charge, bonding properties, and adsorption modes. The study also develops adsorption models for the flotation of K-feldspar activated by Al(III) and Fe(III), revealing the synergistic impacts of metal ion hydrolysis products and sodium oleate in the formation of hydrophobic complexes.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 6; art. no. 174724
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First beam from the DECRIS 14-2m ion source for Slovak Republic
Autorzy:
Loginov, V.
Bekhterev, V.
Bogomolov, S.
Efremov, A.
Lebedev, A.
Leporis, M.
Yazvitsky, N.
Zelenak, A.
Powiązania:
https://bibliotekanauki.pl/articles/148668.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ECR ion source
injector
Opis:
The ECR laboratory of the Cyclotron Centrum of Slovak Republic (CC SR) in Bratislava, Slovakia, consists of the DECRIS 14-2m ion source and two low energy channels. It is a complete injector, consisting of an ECR ion source, focusing and steering elements, an analyzing magnet, a vacuum system, and an ion beam diagnostic system. The DECRIS 14-2m ion source is a multiply charged heavy ion source based on the electron cyclotron resonance principle. The ECR ion source DECRIS 14-2m and other system have been designed and manufactured at the FLNR JINR. The preliminary testing (magnetic field measurements, vacuum testing and testing of ECR ion source) has been performed at FLNR JINR. The final assembly of the DECRIS 14-2m will be done at the CC SR in Bratislava.
Źródło:
Nukleonika; 2003, 48,suppl.2; 85-88
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using Ion Exchange Process in Removal of Selected Organic Pollution from Aqueous Solutions
Autorzy:
Kaleta, J.
Papciak, D.
Puszkarewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/124087.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
detergent
phenol
ion-exchange
Opis:
Surfactant and phenol were removed using AMBERLITE IRA 900 Cl ion-exchange resin, which is a strong alkali. In the process, the tests were carried out under non-flow conditions, the effect of contact time and ionite dose on the surfactant and phenol exchange was determined. The tests under the through-flow conditions were realized in three consecutive cycles, preceded by regeneration and rinsing. The obtained results served for determination of ion-exchange capabilities of the studied ionite. The usable ion-exchange capabilities of the resin obtained after the second and third ionite operation cycle were lower by about 10% (surfactant) and 14.29-17.86% (phenol) than those after the first cycle. It shows that the process of sorption occurred simultaneously with the ion-exchange process.
Źródło:
Journal of Ecological Engineering; 2018, 19, 4; 136-142
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usuwanie jonów Ni(II) w obecności DS z wód i ścieków
Removal of NI(II) ion in the presence of DS form waters and waste waters
Autorzy:
Gęca, M.
Hubicki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1207468.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
nikiel
sorpcja
wymiana jonowa
jonity
nickel
sorption
ion exchange
ion exchangers
Opis:
W pracy przeprowadzono badania nad sorpcją kompleksów jonów Ni(II) z tetrasodową solą kwasu poliasparaginowego (Baypure DS 100) jako czynnikiem kompleksującym na jonitach Lewatit MonoPlus M 800 oraz Lewatit MK-51. Proces sorpcji prowadzono metodą statyczną w zależności od czasu kontaktu faz, pH, temperatury i stężenia jonów Ni(II) i DS w roztworze. Stwierdzono, że maksymalny procent usunięcia kompleksów Ni(II)-DS = 1:1 uzyskuje się dla w/w jonitów przy pH >7,0. Wzrost temperatury wpływa nieznacznie na efektywność sorpcji na wszystkich jonitach. Usuwanie jonów niklu(II) w obecności czynnika kompleksującego zachodzi z wyższą wydajnością na jonicie Lewatit MK-51.
The paper presents the studies of sorption of the Ni(II) ions complexes with tetrasodium salt of polyaspartic acid (Baypure DS 100) as a complexing agent on the ion exchangers Lewatit MonoPlus M800 and Lewatit MK-51. The sorption process was carried out by the static method depending on the phase contact time, pH, temperature and concentration of Ni(II) ions and DS in the solution. The maximal percentage of Ni(II)-DS=1:1 complexes is obtained for the above mentioned ions at pH>7.0. The temperature increase causes insignificant decrease in sorption effectiveness on all ion exchangers. Removal of nickel(II) ions in the presence of the ion exchanger Lewatit MK-51.
Źródło:
Chemik; 2012, 66, 12; 1353-1359
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Heavy Metal by Ion Exchange Using Bentonite Clay
Autorzy:
Hussain, Shaymaa Talib
Ali, Seroor Atalah Khaleefa
Powiązania:
https://bibliotekanauki.pl/articles/1839579.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bentonite
lead ion
copper ion
adsorption
wastewater
Freundlich isotherm
Langmuir isotherm
Opis:
Bentonite clay was utilized in this research as adsorbent element to remove the lead and copper ions from wastewater. Series of tests were performed at multiple parameters, such as pH solution, initial concentration of lead and copper ions, adsorbent mass, and contact time. The greatest removal was attained at pH 5, adsorbent weight of 0.5 g, initial heavy metal concentration of 10 mg/l, and a contact time of 60 minutes. The results revealed that bentonite clay is suitable in the removal of metal ions from polluted water. The ion exchange rate of lead was faster than that of copper. The isotherm for the adsorption of the lead and copper ions on bentonite clay was confirmed by the Freundlich and Langmuir isotherms which offered good consequences. The results indicated that bentonite was utilized as an efficient ion exchange element for the removal of heavy metal ions from polluted water. Fourier Transformed Infrared Spectrophotometer (FTIR) images of bentonite clay before and after adsorption showed the imbibition of metal ions by bentonite clay.
Źródło:
Journal of Ecological Engineering; 2021, 22, 1; 104-111
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of positron lifetime spectra in iron defected with highly energetic Bi and Kr ions
Autorzy:
Pietrzak, R.
Szatanik, R.
Glatki, K.
Powiązania:
https://bibliotekanauki.pl/articles/146340.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ion implantation
defects
annihilation
Opis:
The positron lifetime spectra in iron defected with a beam of Bi+51 and Kr+27 ions of energies 670 MeV and 240 MeV, respectively, were investigated. These spectra were analysed by an appropriate separation in 1, 2 or 3 components. It has been found that the experimental data best fit to the assumed model if only two components are taken into account. For comparison, we investigated both irradiated and non-irradiated surfaces of the sample. We have taken into account the fact that the range of penetration of iron by Bi and Kr ions is small. The dependence of the positron lifetime spectra on the absorbed dose and kind of the bombarding ions is presented.
Źródło:
Nukleonika; 2010, 55, 1; 27-30
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of defect structure on the surface sputtering of metals under irradiation of swift heavy ion in the inelastic energy loss region
Autorzy:
Cheblukov, Y.
Didyk, A.
Hofman, A.
Semina, V.
Starosta, W.
Powiązania:
https://bibliotekanauki.pl/articles/147977.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
defect concentration effect
ion irradiation
ion track temperature
metals
sputtering
surface structure
Opis:
The results of the influence of heavy ion irradiation in the inelastic energy loss region on the structure of some metals such as nickel, single crystal tungsten, chromium-nickel stainless steel and cold-deformed gold are presented. It was shown that the sputtering (evaporation) yield strongly depends on the density of defects in these metals. The sputtering yield starts to grow strongly with the increase of damages created by elastic and inelastic energy heavy ion losses. The stainless steel surface structure behaved differently under irradiation than the pure metal surface structure.
Źródło:
Nukleonika; 2004, 49, 1; 15-21
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza próbek stałych techniką chromatografii jonowej - czy to możliwe?
Autorzy:
Michalski, R.
Powiązania:
https://bibliotekanauki.pl/articles/273990.pdf
Data publikacji:
2012
Wydawca:
Roble
Tematy:
chromatografia jonowa
próbka stała
combustion ion chromatography
CIC
ion chromatography
solid sampling
Źródło:
LAB Laboratoria, Aparatura, Badania; 2012, 17, 4; 26-30
1427-5619
Pojawia się w:
LAB Laboratoria, Aparatura, Badania
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usuwanie jonów ołowiu(II) z modelowych roztworów wodnych metodą wymiany jonowej
Removal of Pb2+ ions from model aqueous solutions using the exchange method
Autorzy:
Bożęcka, A.
Bożęcki, P.
Kasprzyk, P.
Sanak-Rydlewska, S.
Powiązania:
https://bibliotekanauki.pl/articles/2072508.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
jonity
wymiana jonowa
jony ołowiu
ion-exchange resins
ion exchange
lead ions
Opis:
W pracy podano wyniki badań usuwania jonów Pb2+ z modelowych roztworów wodnych z wykorzystaniem procesu wymiany jonowej na jonicie C 160 firmy Purolite. Porównano trzy sposoby wykonywania procesu wymiany jonowej: metodę przepływową w biurecie, metodę dynamiczną z wykorzystaniem mieszadła mechanicznego oraz metodę dynamiczną z zastosowaniem wytrząsarki. Zakres badanych stężeń wyjściowych jonów ołowiu wynosił od 6 do 110 mg/dm3.
Results of Pb2+ ions removal from model aqueous solutions are presented in the paper. Ion exchange resins C 160 made by Purolite were used in research. Three different methods of ion exchange process, i.e. flow method in the burette, dynamic method using a mechanical stirrer and dynamic method using a shaker are compared. Scope of initial concentrations of lead ions was 6-M10 mg/L.
Źródło:
Inżynieria i Aparatura Chemiczna; 2013, 3; 152--154
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The creation of zone of pure iron as the effect of denitriding of iron nitrides [epsilon]+[gamma] layer in the ion etching process
Powstawanie warstwy żelaza jako efekt odazotowania warstwy azotków żelaza [epsilon]+[gamma] w procesie trawienia jonowego
Autorzy:
Smolik, J.
Powiązania:
https://bibliotekanauki.pl/articles/257658.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
warstwa azotowana
azotowanie jarzeniowe
trawienie jonowe
nitrided layer
ion nitriding
ion etching
Opis:
The paper presents research results of the influence of the ion etching process on the intensity of denitriding of iron nitrides [epsilon] + [gamma]' layer, obtained by the gas nitriding method on the surface of Armco. The influences of two different types of plasma atmospheres during the ion etching processes were investigated: metallic plasma (Cr+) and gas-metallic plasma (Cr++N+). The ion etching processes were executed by means of the arc sources. After the ion etching processes the CrN coating with the thickness of about 2-3 žm was deposited with the use of the arc-evaporation method. The structure obtained by ion etching and CrN deposition processes has been determined by means of scanning microscopy and EDS analysis. Thanks to the testing, the thickness of pure iron zone, which was created during the ion etching process, as the effect of denitriding of iron nitrides [epsilon]+[gamma]' layer, was define. Based on the obtained results the influence of the different type of plasma atmosphere during the ion etching process of iron nitride layer, on the intensity of creation of pure iron zone, was determined.
W artykule przedstawiono efekt wpływu procesu trawienia jonowego na intensywność odazotowania warstwy azotków żelaza [epsilon]+[gamma]' wytworzonej w procesie azotowania gazowego na żelazie Armco. Procesy trawienia jonowego zrealizowano w plazmie metalicznej (Cr+) oraz metaliczno-gazowej (Cr++N+) z wykorzystaniem źródeł plazmy łukowej. Bezpośrednio po procesie trawienia jonowego na trawionym podłożu osadzano warstwę CrN o grubości 2-3 žm metodą łukowo-próżniową. Dla wszystkich badanych próbek, z wykorzystaniem mikroskopii skaningowej oraz liniowej analizy składu chemicznego metodą EDS, określono grubość warstwy czystego żelaza wytworzonej w wyniku procesu odazotowania podczas trawienia jonowego warstwy azotków żelaza [epsilon]+[gamma]'. Na podstawie uzyskanych wyników dokonano oceny wpływu składu środowiska plazmowego na intensywność procesu odazotowania analizy azotków żelaza [epsilon] + [gamma]' i tworzenia się warstwy czystego żelaza.
Źródło:
Problemy Eksploatacji; 2009, 3; 141-149
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Status of ISL
Autorzy:
Homeyer, H.
Powiązania:
https://bibliotekanauki.pl/articles/146213.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
accelerator operations
ion beam technologies
Opis:
The Ion Beam Laboratory (ISL), operated by the Hahn-Meitner-Institut, Berlin, is exclusively dedicated to ion beam applications-technologies in materials science and medicine. ISL provides beams of light and heavy ions from various accelerators, and combinations of accelerators, with energies ranging from 10 eV to several 100 MeV. It operates various permanently installed target areas equipped with specific instruments for the different ion beam applications and fundamental ion solid state interaction research.
Źródło:
Nukleonika; 2003, 48,suppl.2; 127-130
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The proton beam energy measurement by a time-of-flight method
Autorzy:
Kisieliński, M.
Wojtkowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/148266.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
beam diagnostics
cyclotron
ion beam
Opis:
A simple TOF equipment for cyclotron protons beam energy measurement was constructed. For short distance of 165 cm between capacitive pick-up probes, the accuracy of proton beam energy is below 1% for mean beam currents above 200 nA and within the energy range 20 30 MeV.
Źródło:
Nukleonika; 2007, 52, 1; 3-5
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetics of uranyl ion polymerization in the presence of ammonium hydroxide
Autorzy:
Abdelrazek, I.
Zidan, W.
Farag, H.
Barakat, M.
Powiązania:
https://bibliotekanauki.pl/articles/148783.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
uranyl ion
hydrolysis
kinetics
polymerization
Opis:
Kinetics of the polymerization of UO2 2+ ion to UO2[(OH)2UO2]4 2+ in the ammonia-uranyl nitrate system has been studied. The deepening of the color formed with the addition of ammonia made it possible to estimate spectrophotometrically the concentration of the formed UO2[(OH)2UO2]4 2+ ions in the solution at 420.6 nm. The effects of pH, temperature as well as the concentration of uranyl ion have been investigated. The reaction rate equation for the polymerization reaction is presented. Linear dependencies of logarithm of the apparent reaction-rate constant on both pH and the reverse of temperature were observed.
Źródło:
Nukleonika; 2005, 50, 2; 57-60
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
0 niepewnościach stężenia wzorców stosowanych podczas kalibracji potencjometrycznych elektrod jonoselektywnych
About the uncertainty of concentration standards applied in the calibration of potentiometric ion-selective electrodes
Autorzy:
Wiora, J.
Powiązania:
https://bibliotekanauki.pl/articles/152458.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
elektroda jonoselektywna
niepewność
stężenie
aktywność jonów
ion-selective electrode
uncertainty
concentration
ion activity
Opis:
W artykule przedstawiono relacje pomiedzy potencjałem elektrody jonoselektywnej a stężeniem jonów w roztworze. Przedstawiono przykład wykonania wzorca aktywności. Przeanalizowano niepewność stężenia jonów we wzorcach przygotowywanych poprzez rozpuszczanie soli, we wzorcach powstałych poprzez rozcieńczenia oraz we wzorcach otrzymanych automatycznie metodą wielokrotnego rozcieńczania wzorca.
The relationship between the potential E of the ion-selective electrode and ion concentration c are presented in the paper - eqs. (1)-5). The operations needed to prepare an activity standard, basing on eqs. (7) - (10), are listed and an example is given, haw to make it. Basing on eq. (11), linking concentration c, mass of salt m* and volume of solution V, the relative concentration uncertainty ur(c) is derived - eq. (12), and using a scale and non-ideal salt not having 100% content (cont) of substance of interest, the eq. (14) is obtained. After dilutions - eq. (15), concentration uncertainty changes - eq. (17). The next example is placed illustrating the change. The concentration uncertainties of standards obtained using multiple dilution method implemented on the automatic system SAWCEJS [5] are calculated in sec. 4.
Źródło:
Pomiary Automatyka Kontrola; 2008, R. 54, nr 5, 5; 318-321
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SPIRAL – a new radioactive beam facility
Autorzy:
Lieuvin, M.
Powiązania:
https://bibliotekanauki.pl/articles/146197.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
accelerator
radioactive ion beams
facility
Opis:
SPIRAL, the Radioactive Beam Facility at GANIL (Caen-France) is in operation since September 2001 and has already accelerated several radioactive beams. The paper presents the machine and the main characteristics of the first beams produced. We describe also the new project which is presently under discussion at GANIL:SPIRAL 2. This new machine will use either an electron or a deuteron linac to produce heavy fission nucleons far from the valley of stability.
Źródło:
Nukleonika; 2003, 48,suppl.2; 149-154
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measurements of electron and ion beams emitted from the PF-1000 device in the upstream and downstream direction
Autorzy:
Kwiatkowski, R.
Skladnik-Sadowska, E.
Malinowski, K.
Sadowski, M. J.
Czaus, K.
Zebrowski, J.
Karpinski, L.
Paduch, M.
Scholz, M.
Garkusha, I. E.
Kubeš, P.
Powiązania:
https://bibliotekanauki.pl/articles/146626.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron beam (EB)
ion beams
PF-1000 facility
magnetic analyzer
ion pinhole cameras (IPC)
Opis:
In this paper we report on measurements of the energy spectra and other properties of the electron and fast ion beams emitted in the upstream and downstream direction along the z-axis of a large plasma focus device PF-1000, that was operated at 21-27 kV, delivering 290–480 kJ pulse. Measurements of the electron beam (EB) properties were performed using a magnetic analyzer. Properties of the ion beams were measured by means of pinhole cameras equipped with PM-355 nuclear track detectors and placed at various angles (0, 60 and 180 centigrade) to the discharge axis. Measurements revealed a complex spatial structure of the fast ion beams. The ion measurements behind the PF-1000 collector proved that some fast deuterons are emitted also in the upstream direction. Measurements of the EBs emitted in the upstream and downstream direction revealed electron energies in the range from approximately 40 keV to approximately 800 keV. These spectra confirm that in localized regions within the PF-1000 plasma column there appear strong fields accelerating charged particles in different directions along the discharge axis.
Źródło:
Nukleonika; 2011, 56, 2; 119-123
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods Used to Extinguish Fires in Electric Vehicles
Metody gaśnicze stosowane do gaszenia pożarów samochodów elektrycznych
Autorzy:
Lesiak, Piotr
Pietrzela, Dariusz
Mortka, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2060730.pdf
Data publikacji:
2021
Wydawca:
Centrum Naukowo-Badawcze Ochrony Przeciwpożarowej im. Józefa Tuliszkowskiego
Tematy:
lithium-ion battery
Li-Ion
fire
extinguishing
suppression
akumulator litowo-jonowy
pożar
gaszenie
tłumienie
Opis:
Aim: The aim of the article is to present the current state of knowledge regarding the possibility of suppressing or effectively extinguishing fires of electric vehicle. Due to the growing popularity of means of transport powered by electric batteries, the problem of emerging fires and their effects is becoming recognizable. Due to the possible violent process of combustion of lithium-ion batteries (hereinafter referred to as Li-Ion batteries), a fire in a vehicle may lead to a wide range of property damage. For at least a decade, intensive efforts have been made to develop appropriate methods to allow firefighters to deal with the problem of fires of electric vehicles. These activities were directed, among others, at new fire extinguishing/suppression techniques, innovative extinguishing agents and methods of their application. Introduction: Taking into account the current global trends in changing the method of powering vehicles from fossil fuels into electricity, the occurrence of such events should be expected to intensify. The authors systematize the issue by analysing the literature on fires, Li-Ion batteries being a critical element that may initiate a fire. The adopted and practiced methods of extinguishing/suppressing a fire as well as the used extinguishing agents were also analysed. The publication may be an element helpful in selecting the most optimal fire extinguishing method of the electric energy storage unit in a vehicle. Methodology: The review of the current state of knowledge was made based on publications on the fire characteristics of Li-Ion batteries, as well as works and research projects in the field of extinguishing methods and the effectiveness of various extinguishing agents. In addition, the procedures used by the emergency services and selected real events were analysed. Conclusions: Fires of Li-Ion batteries are a relatively new and growing phenomenon. Fires in fully or partially electric vehicles are much more difficult to fully extinguish compared to fires in vehicles with internal combustion engines. So far, no effective method has been developed that would allow a fire to be extinguished in a short time. Activities in this area focus on minimizing the effects. There is still a need to look for new technical and tactical solutions in order to optimize the procedures leading to more effective activities of the services in this type of incidents.
Cel: Celem artykułu jest przedstawienie aktualnego stanu wiedzy w zakresie możliwości tłumienia lub skutecznego ugaszenia pożarów pojazdów elektrycznych. Z uwagi na wzrost popularności środków transportu zasilanych z akumulatorów elektrycznych, rozpoznawalna staje się problematyka pojawiających się pożarów i ich skutków. Z uwagi na możliwy gwałtowny proces przebiegu spalania akumulatorów litowo-jonowych (dalej akumulatory Li-Ion), wystąpienie pożaru w pojeździe może doprowadzić do szerokiego spektrum uszkodzeń mienia. Od co najmniej dekady prowadzone są intensywne działania ukierunkowane na wypracowanie właściwych metod pozwalających strażakom zmierzyć się z problemem pożarów pojazdów elektrycznych. Działania te ukierunkowano m.in. na nowe techniki gaszenia/tłumienia pożaru, innowacyjne środki gaśnicze i sposoby ich aplikacji. Wprowadzenie: Ratownicy coraz częściej spotykają się z pożarami układów gromadzenia energii elektrycznej wykonanych w technologii Li-Ion, w tym stosowanych w pojazdach elektrycznych. Biorąc pod uwagę obecne, światowe trendy zmiany sposobu zasilania pojazdów z paliw pochodzących z kopalin na energię elektryczną, należy spodziewać się intensyfikacji pojawiania się takich zdarzeń. Autorzy systematyzują zagadnienie poprzez analizę literaturową w zakresie pożarów akumulatorów Li-Ion jako krytycznego elementu mogącego zapoczątkowywać pożar. Analizie także poddano przyjęte i praktykowane metody gaszenia/tłumienia pożaru oraz wykorzystane środki gaśnicze. Publikacja może stanowić element pomocny w doborze najbardziej optymalnej metody ugaszenia pożaru zespołu gromadzenia energii elektrycznej w pojeździe. Metodologia: Przeglądu obecnego stanu wiedzy dokonano na podstawie publikacji dotyczących charakterystyki pożarowej akumulatorów Li-Ion, a także prac oraz projektów naukowo-badawczych z zakresu metod gaszenia i efektywności różnych środków gaśniczych. Ponadto analizie poddano procedury stosowane przez służby ratownicze oraz wybrane zdarzenia rzeczywiste. Wnioski: Pożary akumulatorów Li-Ion to stosunkowo nowe i narastające zjawisko. Pożary pojazdów w pełni lub częściowo elektrycznych są znacznie trudniejsze do pełnego ugaszenia w porównaniu do pożarów pojazdów z silnikami spalinowymi. Jak dotąd nie opracowano skutecznej metody, która pozwoliłaby na ugaszenie pożaru w krótkim czasie. Działania w tym obszarze skupiają się na minimalizacji skutków. W dalszym ciągu istnieje potrzeba szukania nowych rozwiązań technicznych i taktycznych w celu optymalizacji procedur prowadzących do bardziej efektywnych działań służb przy tego rodzaju zdarzeniach.
Źródło:
Safety and Fire Technology; 2021, 58, 2; 38--57
2657-8808
2658-0810
Pojawia się w:
Safety and Fire Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of Co2+ ions removal from water solution by using ion exchangers
Badania nad usuwaniem jonów Co2+ z roztworów wodnych przy użyciu wymieniaczy jonowych
Autorzy:
Bożęcka, A.
Sanak-Rydlewska, S.
Powiązania:
https://bibliotekanauki.pl/articles/216689.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
jonit
wymiana jonowa
ścieki
jony kobaltu
ion exchange resin
ion exchange
wastewater
cobalt ions
Opis:
At present, industrial development is increasing pollution of soils, air and natural waters. These pollutants have a negative effect on the health and life of living organisms. Metals which interfere with the natural biological balance and inhibit self-cleaning processes in water bodies have particularly toxic effects. Cobalt, which gets into the environment from industrial sewage from electrochemical plants and the metallurgical industry, also belong to this group. This is also relatively rare and precious element, so it is important to look for additional sources of its recovery. Chemical and physicochemical methods such as: precipitation, extraction, membrane processes – nanofiltration, reverse osmosis, sorption and ion exchange are used to recover cobalt. The choice of method depends on: the kind and composition of wastewaters as well as on form and concentration of the pollutants. Ion exchange resins produced by Purolite which were used to remove cobalt ions from solutions with concentrations corresponding to its contents in galvanic wastewater was the subject of the study. It has been shown that the C 160 ion exchange resin has the best the sorption properties for Co2+ ions (54.7 mg/g). In case of this ion exchange resin, after sorption process carried out in one 50 minute cycle, cobalt concentration decreased from about 30 g/L to about 9 g/L. The values of the sorption capacity do not depend on the method of introducing the solution into an ion exchange column (pouring or dropping). Each of the tested ion exchange resins is characterized by a high degree of cobalt concentration after regeneration using mineral acids, which can be advantageous in selecting the recovery method for this metal.
Współcześnie rozwój przemysłu przyczynia się do wzrostu zanieczyszczenia gleb, powietrza i wód naturalnych. Zanieczyszczenia te negatywnie wpływają na zdrowie i życie organizmów żywych. Toksyczne działanie wykazują zwłaszcza metale, które zakłócają naturalną równowagę biologiczną oraz hamują procesy samooczyszczania w zbiornikach wodnych. W tej grupie jest również kobalt, który dostaje się do środowiska naturalnego ze ścieków przemysłowych pochodzących z zakładów elektrochemicznych oraz z przemysłu metalurgicznego. Jest to również stosunkowo rzadki i cenny pierwiastek, dlatego ważne jest poszukiwanie dodatkowych źródeł jego odzysku. Do pozyskiwania kobaltu stosuje się metody chemiczne i fizykochemiczne, takie jak: strącanie; ekstrakcja; procesy membranowe – nanofiltracja, odwrócona osmoza, sorpcja i wymiana jonowa. Wybór metody zależy od rodzaju i składu ścieków oraz postaci i stężenia usuwanych form zanieczyszczeń. Przedmiotem badań były jonity firmy Purolite, które zastosowano do usuwania jonów Co2+ z roztworów o stężeniach odpowiadających zawartościom tego metalu w ściekach galwanicznych. Wykazano, że najlepsze właściwości sorpcyjne w stosunku do badanych jonów ma kationit C 160 (54,7 mg/g). W przypadku tego jonitu po jednym, 50-minutowym cyklu, stężenie kobaltu obniża się z około 30 do około 9 g/dm3. Wartości pojemności sorpcyjnej nie zależą od sposobu wprowadzania roztworu do kolumny jonitowej (wlanie lub wkraplanie). Każdy z badanych jonitów charakteryzuje się wysokim stopniem koncentrowania kobaltu w wyniku regeneracji przy użyciu kwasów mineralnych, co może być korzystne przy wyborze metody odzysku tego metalu.
Źródło:
Gospodarka Surowcami Mineralnymi; 2018, 34, 3; 85-98
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Status of the Warsaw ECR ion source and injection line
Autorzy:
Sudlitz, K.
Kulczycka, E.
Filipiak, B.
Górecki, A.
Powiązania:
https://bibliotekanauki.pl/articles/148684.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
axial injection
Electron Cyclotron Resonance (ECR)
highly charged ions
implantation
ion source
ion transport
Opis:
A room temperature home built 10 GHz ECR ion source delivers beams of B, C, N, O, F, Ne, S, Ar to the Cyclotron U200-P. The same ion source has also been used for surface irradiation of the solids. To upgrade the ion source and increase the ion current in the cyclotron an oven for evaporation of solid materials has been constructed and a two gap buncher has been installed in the injection line. Some new observations on the influence of the extraction system on the ion beam current will be presented.
Źródło:
Nukleonika; 2003, 48,suppl.2; 105-108
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-self-sustained discharge with hollow anode for plasma-based surface treatment
Autorzy:
Misiruk, I. O.
Timoshenko, O. I.
Taran, V. S.
Garkusha, I. E.
Powiązania:
https://bibliotekanauki.pl/articles/147876.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
diffusion saturation
film deposition
hollow anode
ion etching
ion pumping
non-self-sustained glow discharge
Opis:
The paper discusses plasma methods for surface modification using the non-self-sustained glow discharge with a hollow anode. This discharge is characterised by low voltage and high values of electron and ion currents. It can be easily excited in vacuum-arc installations that are widely used for coatings deposition. It is shown that such type of discharge may be effectively used for ion pumping, film deposition, ion etching, diffusion saturation of metallic materials, fusion and brazing of metals, and for combined application of above mentioned technologies in a single vacuum cycle.
Źródło:
Nukleonika; 2016, 61, 2; 195-199
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena wpływu temperatury otoczenia na zasięg, obciążalność i możliwość rozruchu pojazdu elektrycznego zasilanego z baterii trakcyjnej typu LI-Ion
Evaluation of the influence of ambient temperature on vehicle range, battery load and movability of electric car powered by Li-Ion traction battery
Autorzy:
Torbus, B.
Meinicke, T.
Tyrtania, R.
Powiązania:
https://bibliotekanauki.pl/articles/1200335.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
Tematy:
samochody elektryczne
bateria Li-Ion
badania zasięgu
electric vehicles
Li-Ion batteries
vehicle range tests
Opis:
Energy storage used in automotive industry is exposed to extreme temperature changes due to wide ambient conditions. Knowing the thermal limitations of Li-Ion based batteries, the vehicle range and usability tests of electric vehicle powered by those cells were conducted under both high and low ambient temperatures. For this purpose, drive tests in climatic dynamometer chamber were performed at several ambient temperature conditions, following UNECE 101 Regulation. During these tests, electric drivetrain parameters were recorded, which enabled further analysis of the obtained results.
Magazyny energii stosowane w pojazdach samochodowych, ze względu na zróżnicowane warunki użytkowania pojazdów, narażone są na skrajne zmiany temperatury. Znając ograniczenia termiczne baterii opartych na ogniwach Li-Ion, zdecydowano się na przeprowadzenie badań zasięgu i poprawności funkcjonowania pojazdu elektrycznego opartego o w/w ogniwa w zakresie wysokich i niskich temperatur otoczenia. W tym celu pojazd został poddany badaniom w klimatyzowanej komorze hamowni podwoziowej wg. wytycznych Regulaminu 101 EKG ONZ w różnych temperaturach otoczenia. W trakcie testów rejestrowano parametry elektrycznego układu napędowego, co pozwoliło na szerszą analizę wyników przeprowadzonych badań.
Źródło:
Maszyny Elektryczne: zeszyty problemowe; 2017, 1, 113; 43-47
0239-3646
2084-5618
Pojawia się w:
Maszyny Elektryczne: zeszyty problemowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of TiN coatings by ion implantation
Autorzy:
Narojczyk, J.
Morozow, D.
Powiązania:
https://bibliotekanauki.pl/articles/386761.pdf
Data publikacji:
2017
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
ion implantation
TiN
silicon
HSS
turning
Opis:
The high-speed steel HS 6-5-2 cutting inserts coated with TiN were subjected to ion implantation with both silicon (dose 2x1017Si+ /cm2 ) and silicon with nitrogen ions (dose (1+1)x1017(Si+ + N+ )/cm2 ) on the subsurface layer of the rake face. Microhardness was examined before and after ion implantation. The composition and structural properties of the subsurface layer were examined by Glow Discharge Optical Emission Spectroscopy (GD-OES). The turning tests of 40H construction steel with the use of the cutting inserts implanted and non-implanted were performed. During the tests the two components of the net cutting force (the main cutting force Fc and feed force Ff) as well as the wear parameters VB on the major flankalong with the surface roughness (Ra) were measured. The implanted inserts exhibited higher durability compared to non-implanted ones.
Źródło:
Acta Mechanica et Automatica; 2017, 11, 3; 190-193
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response surface methodology (RSM) and its application for optimization of ammonium ions removal from aqueous solutions by pumice as a natural and low cost adsorbent
Autorzy:
Moradi, M.
Fazlzadehdavil, M.
Pirsaheb, M.
Mansouri, Y.
Khosravi, T.
Sharafi, K.
Powiązania:
https://bibliotekanauki.pl/articles/950773.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pumice
ion adsorption
response surface methodology
Opis:
This research was conducted to study the adsorption of ammonium ions onto pumice as a natural and low-cost adsorbent. The physico-chemical properties of the pumice granular were characterized by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Modeling and optimization of a NH4+ sorption process was accomplished by varying four independent parameters (pumice dosage, initial ammonium ion concentration, mixing rate and contact time) using a central composite design (CCD) under response surface methodology (RSM). The optimum conditions for maximum removal of NH4+ (70.3%) were found to be 100 g, 20 mg/l, 300 rpm and 180 min, for pumice dosage, initial NH4+ ion concentration, mixing rate and contact time. It was found that the NH4+ adsorption on the pumice granular was dependent on adsorbent dosage and initial ammonium ion concentration. NH4+ was increased due to decrease the initial concentration of NH4 and increase the contact time, mixing rate and amount of adsorbent.
Źródło:
Archives of Environmental Protection; 2016, 42, 2; 33-43
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Fast Method of Identifying Rechargeable Batteries Condition and Defects
Autorzy:
Kuliński, K.
Nowrot, A.
Powiązania:
https://bibliotekanauki.pl/articles/2064967.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
lithium-ion batteries
electrochemical impedance spectroscopy
Opis:
The paper presents fast method of identifying industrial and general use rechargeable batteries condition and defects exemplary lithium-ion cells. The proposed method is based on measuring a internal battery electrical impedance for selected frequency points and the next the results are compare with reference characteristics. Diagnostic process is performed for a few minutes when the battery is charging or discharging. So far used, the most popular methods require controlled charging and discharging cells to determine approximately of their capacity and need a long time of the diagnostic process (about few hours to over a dozen hours). The new method allows the dramatically reduction of measurement time and in effect reduces financial work costs of service. The paper shows a various setup systems with commonly use RLC impedance bridges were used in the research. The analysis of measurements allowed to determine the specific spectral function, which indicates rechargeable battery condition. Moreover, it is also possible to apply the obtain method to another electrochemical cell type.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 301--305
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of magnesium in the supposed mechanism of anaesthesia
Autorzy:
Kiss, S.A.
Galbacs, Z.
Galbacs, G.
Powiązania:
https://bibliotekanauki.pl/articles/14886.pdf
Data publikacji:
2006
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
magnesium
anesthesia
fluidity
ion transport
membrane
Opis:
The anaesthetic, narcotic effect of magnesium has been discussed since the publication of Meltzer-Auger (1906), but its mechanism has not been clarified. Since then, other investigations have also been performed, but none of the publications has explained the issue. We propose a mechanism analogous to the studies made by Feinstein (1964), who examined organic compounds showing anaesthetic effects. Our view is that magnesium abridges two phospholipids of the opposite sides of the membrane through their phosphate groups. This binding results in membrane rigidity, which makes the ion permeability provided by the ion channel and/or carrier decrease or discontinue, thus the halting of the Na+, K+ and Ca2+ ion flow eventually causes an anaesthetic effect. Another possible pathway is that magnesium ions block the activity of N-methyl-D-aspartate (NMDA) receptor to control the ion channel, which also lowers the permeability of the membrane.
Źródło:
Journal of Elementology; 2006, 11, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antimicrobial materials properties based on ion-exchange 4A zeolite derivatives
Autorzy:
Cardoso, Willian A.
Savi, Geovana D.
Feltrin, Ana Carolina
Marques, Carolina R.M.
Angioletto, Everton
Pich, Claus T.
Geremias, Reginaldo
Mendes, Erlon
Angioletto, Elidio
Powiązania:
https://bibliotekanauki.pl/articles/778778.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
antimicrobial
zeolite
ion-exchange
bacteria
yeast
Opis:
Zeolites are nanoporous alumina silicates in a framework with cations, exhibiting ion-exchange properties with metal ions making them possible antimicrobial materials. The aim of this study was to evaluate the antimicrobial activity of ion-exchanged zeolites and the toxic potential of these materials. Zeolite-Co2+ and Li+ exhibited the most effective inhibition on Staphylococcus aureus growth than in other microorganisms (Escherichia coli and Pseudomonas aeroginosa) in low concentrations. Zeolite-Cu2+ presented higher zone of inhibition when tested against Candida albicans, while Zeolite-Zn2+ showed similar effectiveness among all the microorganisms. When ion-exchanged zeolites were used in effective concentrations to achieve antimicrobial activity, no alterations against bioindicators organisms as Artemia sp. and L. sativa were found and, in addition, they have non-significant result in terms of DNA cleavage activity. Zeolites have advantage of releasing slowly the metals loaded and this characteristic can to be considered promising as potential antimicrobial materials in concentrations safe for use.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 4; 31-39
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ metali na brunatnienie roztworów glikozy z lizyną
Vlijanie metallov na okrashivanie (temnenie) rastvorov gljukozy s lizinom v korichnevyjj cvet
Effects of traces of metals on the browning of glucose plus lysine solutions
Autorzy:
Markuze, Z.
Powiązania:
https://bibliotekanauki.pl/articles/873652.pdf
Data publikacji:
1963
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
brunatnienie roztworow
jony metali
absorpcja
roztwory
lizyna
glikoza
jony zelaza
jony miedzi
solution browning
metal ion
absorption
solution
lysine
glucose
iron ion
copper ion
Źródło:
Roczniki Państwowego Zakładu Higieny; 1963, 14, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the addition of zinc and selenium ions on the stability of the Biolasol liquid used for perfusion, reperfusion and preservation of parenchymal organs of the abdominal cavity
Autorzy:
Ostrozka-Cieslik, A.
Dolinska, B.
Caban, A.
Ryszka, F.
Powiązania:
https://bibliotekanauki.pl/articles/16177.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
addition
zinc ion
selenium ion
stability
Biolasol liquid
perfusion
reperfusion
preservation
parenchymal organ
abdominal cavity
Opis:
The Biolasol® liquid is an innovative solution used for perfusion, reperfusion and preservation of parenchymal organs of the abdominal cavity. Substances in the liquid prevent cellular oedema and help to maintain a proper water/mineral as well as acid/base balance in the intracellular environment. They also minimize free-radical injuries and ensure the integrity of the cellular membrane structure. The Biolasol® liquid has been shown to be much more efficient than the HTK liquid in the preservation of kidneys. The Biolasol® liquid containing 0.5 mM of vitamin C has been modified by adding ions of Se(IV), Zn(II), and their effect on the stability of the solution was examined. An accelerated aging test was applied to test the liquid stability. The test, based on the laws of chemical kinetics, was conducted at four temperatures at a 10°C step, that is: 50°C±0.05, 60°C±0.05, 70°C±0.05 and 80°C±0.05. The relative humidity equalled 75% of RH and the duartion of the test was 40 days. In order to determine the stability of the tested solutions, the Arrhenius Dependence equation was used, applied to the effect of temperature on the glucose decomposition reaction rate: lnk=lnA-(Ea/RT). The results indicate that the addition of zinc decreases the stability of the liquid by 30.5%, while the addition of selenium prolongs the stability by 8.21%. This is explained by the synergism of action of vitamin C and Se4+ antioxidant in the tested liquid. Zinc ions present in the solution increase the glucose decomposition reaction rate.
Źródło:
Journal of Elementology; 2015, 20, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the sorption of manganese and iron ions under the effect of differentiated oxygenation and reaction of the soil
Autorzy:
Jackowska, I
Gaszczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/796106.pdf
Data publikacji:
1993
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
dynamic method
iron ion
reaction
manganese ion
oxygenation
soil
sorption
protection
agricultural environment
heavy metal
Opis:
The study is concerned with the course of sorption of Fe²⁺, Fe³⁺ and Mn²⁺ ions and with their washing, out with distilled water in sandy, loess, and loamy soils. Sorption was conducted according to the idynamic method. ODR and Eh were measured as indices of soil oxygenation. It was found that oxygen deficiency of the soils under study, with a change in their reaction from acid to neutral, resulted in: 1. an increase in the sorption of Fe²⁺ and Fe³⁺ ions, 2. an increase in the sorption of Mn²⁺ ions in the loamy soil only.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 1993, 400
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ion Beam Induced Surface Modification of ta-C Thin Films
Autorzy:
Berova, M.
Sandulov, M.
Tsvetkova, T.
Kitova, S.
Bischoff, L.
Boettger, R.
Powiązania:
https://bibliotekanauki.pl/articles/1033772.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
carbon
ion implantation
atomic force microscopy
Opis:
Thin film samples (d ≈40 nm) of tetrahedral amorphous carbon (ta-C), deposited by filtered cathodic vacuum arc, were implanted with Ga⁺ at ion energy E =20 keV and ion fluences D=3×10¹⁴-3×10¹⁵ cm¯² and N⁺ with the same energy and ion fluence D=3×10¹⁴ cm¯². The Ga⁺ ion beam induced surface structural modification of the implanted material, displayed by formation of new phase at non-equilibrium condition, which could be accompanied by considerable changes in the optical properties of the ta-C films. The N⁺ implantation also results in modification of the surface structure. The induced structural modification of the implanted material results in a considerable change of its topography and optical properties. Nanoscale topography and structural properties characterisation of the Ga⁺ and N⁺ implanted films were performed using atomic spectroscopy analysis. The observed considerable surface structural properties modification in the case of the higher fluence Ga⁺ implanted samples results from the relatively high concentration of introduced Ga⁺ atoms, which is of the order of those for the host element.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 299-301
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane zastosowania chromatografii jonowej do oznaczania amin
Selected applications of ion chromatography for the determination of amines
Autorzy:
Michalski, R.
Łyko, A.
Powiązania:
https://bibliotekanauki.pl/articles/270512.pdf
Data publikacji:
2011
Wydawca:
Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
Tematy:
chromatografia jonowa
aminy
ion chromatography
amines
Opis:
Chromatografia jonowa jako odmiana wysokosprawnej chromatografii cieczowej od ponad 35 lat jest wykorzystywana przede wszystkim do oznaczania nieorganicznych anionów i kationów w wodach i ściekach. Jednakże w minionych latach zakres jej zastosowań znacznie się rozszerzył na nowe anality oraz rodzaje matryc. Ważną grupą związków stosowanych w różnych gałęziach przemysłu, jak i obecnych w napojach i żywności są aminy alifatyczne oraz aromatyczne. W pracy przedstawiono wybrane zastosowania chromatografii jonowej do oznaczania amin m.in. w ściekach przemysłowych oraz próbkach napojów i żywności.
Ion chromatography as a kind of high performance liquid chromatography is used for the determination of inorganic anions and cations in water and wastewater since over 35 years. However, nowadays its application is broaden and concerns new analytes and types of sample matrix. An important group of compounds use in different branches of industry, as well as present in beverages and food are aliphatic and aromatic amines. The work presents a selected application of ion chromatography for the determination of amines in e.g. industrial wastewater, and in beverages and food.
Źródło:
Aparatura Badawcza i Dydaktyczna; 2011, 16, 1; 71-77
2392-1765
Pojawia się w:
Aparatura Badawcza i Dydaktyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A survey of multiplicity fluctuations in PHENIX
Autorzy:
Mitchell, J.
Powiązania:
https://bibliotekanauki.pl/articles/148455.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fluctuations
multiplicity
relativistic heavy-ion collisions
Opis:
The PHENIX Experiment at the Relativistic Heavy Ion Collider has made measurements of event-by-event fluctuations in the charged particle multiplicity as a function of collision energy, centrality, collision species, and transverse momentum in heavy-ion collisions. The results of these measurements will be reviewed and discussed.
Źródło:
Nukleonika; 2006, 51,suppl.3; 89-92
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of a biased electrode in the production of highly charged ions using the DECRIS 14-3 ion source
Autorzy:
Leporis, M.
Bogomolov, S.
Efremov, A.
Loginov, V.
Mironov, V.
Powiązania:
https://bibliotekanauki.pl/articles/148672.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ECR ion source
plasma
biased electrode
Opis:
ECR ion sources are used for the production of highly charged ions in various accelerator facilities. In most of them biased electrodes are normally used to increase the ion yield. Physical processes in the plasma of an ion source are quite complicated and the role of a biased electrode is not clear. To investigate the effect of a biased electrode on the intensity of extracted highly charged ions, an axially movable electrode was placed into the plasma chamber of the DECRIS 14-3 ion source. It was found that the intensity of Ar ions depends on the position of the biased electrode and negative bias voltage. The optimal position of the biased electrode was found near the maximum of the magnetic field. Experiments with a pulsed biased electrode were also carried out. The influence of the negative pulse on the ion yield depends on the ion charge state.
Źródło:
Nukleonika; 2003, 48,suppl.2; 89-92
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The TSL 6.4 GHz ECR ion source – status, improvements and measurements
Autorzy:
van Rooyen, D.
Wessman, D.
Powiązania:
https://bibliotekanauki.pl/articles/148680.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ion source
after-glow mode
ECR
Opis:
The TSL 6.4 GHz ECR ion source performs reliably and is well optimized for the various ion species that are routinely provided for experiments. Beam intensities are comparable with other similar sources but at the lower end of the spectrum. We are thus investigating a number of methods of improvement. The development of a micro-oven for low melting point materials was successfully concluded. Further development is needed to improve the consumption rate in order to enable more effective use of expensive isotopes. Measurements with operation of the source in the after-glow mode were successful but the pulse to pulse reproducibility should be further improved. Although the maximum gain compared to the CW mode is satisfactory, accomplishing a higher factor would be even more advantageous for beams delivered to CELSIUS. A systematic study of various parameters was started in order to find optimal operating conditions running in the after-glow mode
Źródło:
Nukleonika; 2003, 48,suppl.2; 99-104
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of heavy-ion collisions using EPOS model in the frame of BES program
Autorzy:
Stefaniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/227252.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
BES program
heavy-ion collisions
EPOS
Opis:
EPOS is a generator which allows one to simulate various types of collisions of divers systems with different initial parameters. It considers the parton-based Gribov-Regge theory. So far the EPOS model has been used to describe higher collision energies obtained with RHIC or LHC data. On the other hand, there is another program under investigation: Beam Energy Scan conducted at Brookhaven National Laboratory. The beams of gold ions are collided at energies such as √sNN - 7:7; 11:5; 19:6; 27; 39, and 62.4 GeV in order to collect and analyze data needed in examination of QGP Phase Diagram. The EPOS model could become a useful tool in such studies. Simulated with EPOS data will be verified using elliptic flow analyses and two-particles femtoscopic correlations, which allow one to measure the size of sources determined by newly created particle.
Źródło:
International Journal of Electronics and Telecommunications; 2018, 64, 1; 65-70
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ion-imprinted polymers: synthesis, characterization and applications
Autorzy:
Cejner, Marzena
Dobrowolski, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/763997.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
Ion-imprinted polymers
Imprinting
Selectivity
Template
Opis:
Ion-imprinted polymers (IIPs) are created based on enzyme phenomenon, where these polymers exhibit selective recognition of metal ions in the presence of matrix ions. For that reason IIPs find many applications in sensors, solid phase extraction and membrane separation of metal ions. This review focuses on the synthesis, characterization and application of IIPs.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2015, 70, 2
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of lizardite on talc flotation using carboxymethyl cellulose as a depressant
Autorzy:
Deng, Jie
Yang, Siyuan
Zhang, Wencai
Liu, Cheng
Li, Hongqiang
Powiązania:
https://bibliotekanauki.pl/articles/1449414.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
talc
lizardite
flotation
CMC
magnesium ion
Opis:
The effect of lizardite on talc flotation when using carboxymethyl cellulose (CMC) as a depressant was studied by micro-flotation experiments and adsorption measurements, zeta-potential measurements, magnesium ion dissolution analysis, and solution chemistry calculation. The results for the micro-flotation experiments showed that the addition of lizardite further decreased the floatability of talc at pH 8.5 when using CMC as the depressant. The mechanism was that magnesium ions dissolved from lizardite lattice, then formed hydrolyzed species of magnesium cations and interacted with talc surfaces, which promoted CMC adsorption, and thus decreasing talc floatability.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 4; 702-709
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Innovative Method for Water Deiron Ions Using Capillary Material
Autorzy:
Trus, Inna
Radovenchyk, Iaroslav
Halysh, Vita
Chuprinov, Evhen
Benatov, Daniel
Hlushko, Olena
Sirenko, Ludmila
Powiązania:
https://bibliotekanauki.pl/articles/2068480.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
iron ion
capillary material
purification
treatment
Opis:
Among all known inorganic pollutants of wastewater and natural water that adversely affect water bodies, different living organisms and human beings, iron compounds are the most common. Before discharging the wastewater into water bodies, it is important to remove iron ions from wastewater. The application of capillary materials in water and wastewater treatment is a promising direction of ecology and technology. The capillary properties of materials allow the development of quite simple, autonomous, highly efficient and energy-saving systems for water purification. The aim of the present paper was the investigation of the influence of the basic conditions of the filtration process with the application of capillary materia on the efficiency of iron ions removal. The initial concentration of the model solution, pH and temperature of the filtration process, as well as the contact area of the liquid phase with oxygen of the air were studied. The proposed method is appropriate for the treatment of water in the concentration range from 5 to 10 mg/dm3 with an optimum pH in the range of 4–7. The experimental data showed high efficiency of capillary materials application, providing sufficient removal of iron ions from low concentrated solutions, compared to the traditional method of precipitation. The main advantage of the capillary materials is the simplicity of their application, quite high degree of purification and there no need to consume electricity or additional reagents, which allows creating autonomous water treatment facilities and plants.
Źródło:
Journal of Ecological Engineering; 2022, 23, 3; 174--182
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the study of ion cyclotron waves in a cylindrical magnetized plasma
Autorzy:
Zaki, N. G.
Powiązania:
https://bibliotekanauki.pl/articles/146676.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electrostatic ion cyclotron (EIC) waves
cylindrical magnetized plasma
ion acoustic wave
torsional and compressional Alfvén waves
Opis:
In this work, a general dispersion relation of waves in the region of ion cyclotron frequency in the cylindrical magnetized plasma is derived. The waves are assumed to be cylindrically symmetric oscillations of small amplitude. Analytical calculations are performed to find the plasma dielectric tensor for the plasma consisting of hot electron and multi-component cold ions fluid. The special case of a three component plasma with hot electrons in a strong magnetic field may be interesting, e.g., in the context of fusion plasma containing D+, T+ and He2+. The general dispersion relation is simplified in two solutions. Firstly, E1 wave (E2 = 0) which has an electrostatic character, and secondly E2 wave (E1 = 0) which has an electromagnetic character. The dispersion relations for both waves are described and identified as the ion acoustic and electrostatic ion cyclotron (EIC) waves for E1 wave and the torsional Alfvén, i.e. ion cyclotron (IC) waves and the compressional Alfvén wave for E2 wave. These waves are studied due to their importance in the heating of plasmas.
Źródło:
Nukleonika; 2011, 56, 2; 179-184
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nad zagospodarowaniem odpadów niebezpiecznych. Cz. 2
Research on hazardous waste management. Pt 2
Autorzy:
Kozłowski, J.
Mikłasz, W.
Lewandowski, D.
Czyżyk, H.
Powiązania:
https://bibliotekanauki.pl/articles/357112.pdf
Data publikacji:
2013
Wydawca:
Politechnika Śląska
Tematy:
odpady
akumulator Li-Ion
akumulator Ni-MH
topienie
wastes
Li-ion batteries
Ni-MH batteries
smelting
Opis:
W pracy przedstawiono wyniki badań mechanicznego przerobu odpadów akumulatorów Li-Ion i Ni-MH z telefonów komórkowych z otrzymaniem frakcji masy anodowo-katodowej do przerobu hydrometalurgicznego. Przedstawiono również wyniki przetopu masy anodowo-katodowej z otrzymaniem stopu Co-Ni i Ni-Co. Prace badawcze prowadzono w IMN Gliwice w ramach projektu kluczowego nr POIG.01.01.02-00-015/09-00 oraz pracy statutowej.
This paper results of mechanical processing of the scrapped Li-Ion and Ni-MH batteries from mobile phones, from which the anode-cathode mass was obtained for hydrometallurgical processing, have been presented. Besides, results from smelting the anode-cathode mass enabling production of the Co-Ni and Ni-Co alloys are given.
Źródło:
Archiwum Gospodarki Odpadami i Ochrony Środowiska; 2013, 15, 2; 77-81
1733-4381
Pojawia się w:
Archiwum Gospodarki Odpadami i Ochrony Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in ion (K, Ca and Na) regulation, antioxidant enzyme activity and photosynthetic pigment content in melon genotypes subjected to salt stress - a mixture modeling analysis
Autorzy:
Erdinc, C.
Powiązania:
https://bibliotekanauki.pl/articles/11885877.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Turkey
arid habitat
semi-arid habitat
plant cultivation
muskmelon
Cucumis melo
plant genotype
antioxidant enzyme
photosynthetic pigment content
calcium ion
potassium ion
sodium ion
salt stress
Opis:
The present study aimed to identify the response of melon accessions and cultivars to salt stress in terms of ion exchange, enzyme activity, lipid peroxidation and photosynthetic pigment contents by mixture modelling. In mixture modeling, it is expected that the data set demonstrates a heterogeneous structure. This heterogeneity is characterized as unobservable heterogeneity. The data set’s heterogeneity produces severe deviations in the parameter assessments and the standard deviations. Heterogeneity is overcome when the data set separates itself into homogeneous sub-populations. Mixture modeling was performed using the Mclust mixture cluster program of the statistical software package R 5.2.3. Sub-populations were constructed by evaluating genotypes according to studied traits and correlation analysis was performed using the SPSS software package. The seedlings of 13 melon genotypes were harvested two weeks after salt application (0 mM or 50 mM NaCl) when symptoms of salt stress were observed. Nutrient contents and ratios (K, Ca, Na, K : Na and Ca : Na); superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activities malondialdehyde (MDA) chlorophyll a, chlorophyll b, total chlorophyll and carotenoid contents were measured. Mixture modeling and correlation analysis were used in evaluating the experimental data sets. Differences in responses to salt application were observed among genotypes. While all genotypes exhibited negative responses in terms of K : Na ratio, which is an important parameter of salt tolerance, the smallest decreases in K : Na ratios were observed in the YYU-11 (–57.09%) and YYU-4 (–58.78%) genotypes, indicating them to be the most tolerant to salt stress. In general, enzyme activity decreased in response to salt application, although the responses varied among genotypes, especially with regard to CAT and APX activity. The YYU-29 genotype was notable as the genotype with the highest K : Na ratio (1.79) as well as the smallest change in MDA content under salt stress.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2018, 17, 1; 165-183
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cooper removal and recovery from aqueous solutions by using selected synthetic ion exchange resins (part I)
Usuwanie i odzysk miedzi z roztworów wodnych przy użyciu wybranych syntetycznych żywic jonowymiennych (część I)
Autorzy:
Orlof-Naturalna, Monika
Bożęcka, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1841489.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
copper ions
ion exchange
ion exchanger resins
microstructural research
jony miedzi
wymiana jonowa
jonity
badania mikrostrukturalne
Opis:
The paper presents results of research on removal of Cu2+ ions from aqueous solutions by ion exchange method in concentration range of 10–1000 mg/L. For this purpose, following Purolite synthetic ion exchange resins were used: S 910, S 930, S 940, S 950 and C 160. The obtained results were interpreted based on the degree of solution purification and microstructural investigations. The regeneration possibility of used ion exchangers with a 10% hydrochloric acid solution was also investigated. Based on obtained results, it was determined that studied ion exchangers efficiently removed copper(II) ions from aqueous solutions, especially in low concentrations. Microstructural investigation made for tested materials after the sorption process clearly indicate that Cu2+ ions removal process was in accordance with ion exchange mechanism, which was confirmed by recorded SEM images. All ion exchangers except S 910, purified solutions from Cu2+ ions with an efficiency greater than 90% up to a concentration of 100 mg/L. In case of S 930 and S 940 ion exchangers, their efficiency was close to 100%. For higher concentrations, efficiency of studied ion exchangers decreased significantly. The lowest decrease in degree of copper(II) S 910 chelating resin with amidoxime groups was the least efficient. All studied ion exchangers can be regenerated with a 10% hydrochloric acid solution. The efficiency of this process varies from 53.1% to 80.5% depending on the used resins.
W pracy przedstawiono wyniki badań dotyczące usuwania jonów Cu2+ z roztworów wodnych metodą wymiany jonowej w zakresie stężeń 10–1000 mg/L. W tym celu zastosowano żywice jonowymienne firmy Purolite: S 910, S 930, S 940, S 950 i C 160. Otrzymane wyniki zinterpretowano w oparciu o stopień oczyszczenia roztworu i badania mikrostrukturalne. Zbadano również możliwość rege¬neracji użytych jonitów za pomocą 10% roztworu kwasu solnego. Na podstawie otrzymanych wyników stwierdzono, że badane jonity skutecznie usuwały jony miedzi(II) z roztworów wodnych, szcze¬gólnie w niskich stężeniach. Badania mikrostrukturalne wykonane dla badanych materiałów po procesie sorpcji wyraźnie wskazują, że proces usuwania jonów Cu2+ zachodził zgodnie z mechanizmem wymiany jonowej, co potwierdzają zarejestrowane obrazy SEM. Na powierzchni badanych jonitów nie zaobserwowano mikrostrąceń. Wszystkie wymieniacze jonowe z wyjątkiem S 910 oczyszczały roztwory z jonów Cu2+ z wydajnością większą niż 90% do stężenia 100 mg/L. W przypadku jonitów S 930 i S 940 ich skuteczność było bliska 100%. W przypadku większych stężeń wydajność badanych jonitów znacząco malała. Najmniejszy spadek stopnia wydzielenia jonów miedzi(II) zaobserwowano dla kationitu C 160 zawierają¬cego grupy sulfonowe. Najmniej skuteczny okazał się jonit chelatujący S 910 z grupami amidoksymowymi. Wszystkie badane jonity można regenerować za pomocą 10% roztworu kwasu solnego. Wydajność tego procesu waha się od 53,1% do 80,5% w zależności od użytej żywicy jonowymiennej.
Źródło:
Inżynieria Mineralna; 2020, 2, 2; 7-14
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie metod elektromembranowych do odsalania roztworów zawierających substancje organiczne
Application of electro-membrane processes to desalination of solutions containing organic compounds
Autorzy:
Majewska-Nowak, K.
Powiązania:
https://bibliotekanauki.pl/articles/237890.pdf
Data publikacji:
2014
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
elektrodializa
monoselektywna membrana jonowymienna
blokowanie membran
jon organiczny
electrodialysis
mono-selective ion-exchange membrane
fouling
organic ion
Opis:
Przedstawiono możliwości procesów elektromembranowych w odsalaniu wodnych roztworów zawierających substancje organiczne. Dyskusję poprzedzono syntetycznym opisem konwencjonalnej elektrodializy, elektrodializy odwracalnej i elektro-dejonizacji. Podkreślono, że zagadnienie odsalania roztworów substancji organicznych jest ważne nie tylko w technologii biochemicznej, ale też w oczyszczaniu wód technologicznych i ścieków przemysłowych. Odsalanie i zatężanie ścieków przemysłowych w układzie mikrofiltracja–elektrodializa pozwala na odzyskanie wody i wartościowych substancji, dając możliwość tworzenia zamkniętych obiegów wody. Wykazano, że usuwanie soli z roztworów zawierających obojętne makrocząsteczki organiczne może być w prosty sposób prowadzone za pomocą konwencjonalnej elektrodializy. Obecność substancji organicznych o jonowym charakterze powoduje intensywne blokowanie membran (fouling) i/lub przenikanie składników organicznych do strumienia koncentratu. Stwierdzono, że w celu wyeliminowania tych problemów należy stosować elektrodializę odwracalną i jonoselektywne membrany jonowymienne.
The potential of electro-membrane processes in salt separation from aqueous solutions containing organic substances was discussed. The discussion was preceded by brief description of conventional electrodialysis, electrodialysis reversal and electrodeionization. It was emphasized that desalination of organic substance solutions was essential not only for biochemical technology, but also for industrial water and wastewater treatment. Desalination and concentration of industrial effluents by microfiltration–electrodialysis system enabled reuse of water and valuable substances, thus providing the possibility of creating water closed-loop systems. It was demonstrated that salt removal from solutions containing neutral organic macroparticles might be a simple procedure when conducted with use of conventional electrodialysis. In contrast, the presence of ionic organic compounds led to intensive fouling and/or leakage of organics into the concentrate stream. It was concluded that to overcome these limitations it was advisable to apply electrodialysis reversal and mono-selective ion-exchange membranes.
Źródło:
Ochrona Środowiska; 2014, 36, 4; 33-43
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ammonia-Ca-K competitive ion-exchange on zeolites in mining wastewater treatment: batch regeneration and column performance
Autorzy:
Chartrand, Zachary G.
Narbaitz, Roberto M.
Sartaj, Majid
Downey, Jason
Powiązania:
https://bibliotekanauki.pl/articles/1839041.pdf
Data publikacji:
2020
Wydawca:
Główny Instytut Górnictwa
Tematy:
ion exchange
ammonia
clinoptilolite
mining wastewater
competitive ion exchange
potassium
wymiana jonowa
amoniak
klinoptylolit
ścieki kopalniane
potas
Opis:
This manuscript addresses the treatment of explosives-impacted mining wastewaters (EIMWW) using ion-exchange to remove elevated levels of ammonia. Repeated batch loading-regeneration cycles were conducted for two commercially available zeolite media used in the treatment of ammonia-laden EIMWW to establish the effects of competing ions and regeneration solution composition. The Northern Ontario EIMWW tested contained 3.87 meq/L total ammonia (TA) as well as 2.85 mg/L K+ and 3.9 meq/L Ca2+. The media studied were a natural clinoptilolite and a modified clinoptilolite (SIR-600). Five regenerant solutions with different NaCl and KCl concentrations were evaluated using batch tests. The presence of potassium in the regenerant was found to hinder the TA exchange capacity of both zeolites. The SIR-600 and the natural clinoptilolite used in conjunction with the 10% NaCl solution featured the best TA exchange capacities, 0.46 ± 0.02 meq TA/g and 0.36 ± 0.05 meq TA/g, respectively. The batch tests showed that both media had a slight preference for K+ over TA. The continuous flow column tests performed using SIR-600 media greatly accentuated the selectivity of K+ over TA. In reaching the same 0.55 meq TA/L breakthrough level, the same modified zeolite column was able to treat five times more volume of a synthetic TA solution than EIMWW.
Źródło:
Journal of Sustainable Mining; 2020, 19, 2; 58-71
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical and TEM characterization of phase transformation in Zn ion implanted and thermal oxidized quartz
Autorzy:
Privezentsev, Vladimir
Powiązania:
https://bibliotekanauki.pl/articles/763347.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
quartz, zinc, ion implantation, annealing, ZnO nanoparticles
Opis:
Metal and metal oxide nanoparticles (NPs) embedded in various matrices have been the object of increasing interest due to their peculiar physical properties significantly different from the corresponding ones of bulk material. Metallic Zn NPs can be used in UV photo-detectors. Zinc oxide NPs play an important role too, since ZnO has direct band gap of 3.37eV, large exiton binding energy of 60meV, sorption effect, room temperature ferromagnetism and others. So they can be used in varies perspective electron devices. In this paper the optical parameters and transmission electron microscopy (TEM) characterization of Zn implanted quartz during NP formation at annealing are reported.Optical-grade high-pure (OH-: 50ppb) amorphous quartz slides were implanted by 64Zn+ ions with fluence of 5×1016/cm2 and energy of 50keV. To avoid the magnificent substrate heating during implantation the ion current density was less than 0.5μA/cm2. Than the samples were subjected to isochronally during 1h oxidation in temperature ranges from 400 up to 800oC. The Zn contained phase creation and its thermal evolution were investigated by recording the optical transmittance spectra at room temperature in a spectral range of 200-800nm and by photoluminescence at temperatures of 10-300K in a spectral range of 350-800nm using an illumination of He-Cd laser with wavelength of 325nm. Visualization and identification of NPs was made by study of the cross section samples TEM fitted with electron diffraction, an EDAX detector attachment for X-ray energy dispersive spectroscopy (EDS), and with a high angle annular dark field detector (HAADF) for scanning operation. The EDS maps of the element distribution and the NP sizes were determined in the scanning TEM regime.As a result of these studies it was found that after the quartz implantation by 64Zn+ ions with fluence of 5×1016/cm2 and energy of 50keV the amorphous metallic Zn NPs with an average radius of 3 nm were created. During process of sequentially isochronally furnace annealing in oxygen atmosphere in 1h in temperature ranges from 400 up to 800oC in samples there was phase transformation from metallic Zn phase to its oxide form. After annealing at 800oC the Zn NPs transform to the ZnO or/and Zn2SiO4 phase with average radius of 4,5nm. 
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AAA – Physica; 2016, 71
0137-6861
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AAA – Physica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie odkształceń sieci krystalicznej w implantowanej warstwie epitaksjalnej GaN osadzonej metodą MOCVD na podłożu szafirowym o orientacji [001]
Lattice strain study in implanted GaN epitaxial layer deposited by means of MOCVD technique on [001] oriented sapphire substrate
Autorzy:
Wójcik, M.
Gaca, J.
Wierzbicka, E.
Turos, A.
Strupiński, W.
Caban, P.
Sathish, N.
Pągowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/192129.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Materiałów Elektronicznych
Tematy:
HRXRD
implementacja jonowa
dyfrakcja
ion implantation
diffraction
Opis:
W pracy zbadano warstwy epitaksjalne GaN o grubości 1000 nm implantowane jonami Ar++ w zakresie dawek od 7 ⋅ 1013 cm-2 do 1 ⋅ 1015 cm-2. Wyznaczono zakres proporcjonalności pomiędzy dawką a średnią zmianą odległości pomiędzy płaszczyznami równoległymi do powierzchni swobodnej implantowanego kryształu GaN. Wyznaczono korelację pomiędzy wielkością dawki jonów a rozkładem odkształceń sieci krystalicznej występujących w kierunku [001] w warstwie epitaksjalnej. Stwierdzono, że odkształcane są płaszczyzny sieciowe równolegle do interfejsu, a komórka elementarna warstwy implantowanej ulega tetragonalizacji.
In the present work 1000 nm epitaxial GaN layer implanted with Ar++ ions in the dose range from 7 ⋅ 1013 cm-2 to 1 ⋅ 1015 cm-2 was investigated. The range of linearity between dose and the average change of interplanar spacing of planes parallel to the surface of the implanted GaN crystal was determined. It was found a correlation between the distribution of displaced atoms and lattice deformation occurring in the [001] direction in the epitaxial layer. It was also observed the tetragonalization of unit cell due to implantation.
Źródło:
Materiały Elektroniczne; 2011, T. 39, nr 4, 4; 22-31
0209-0058
Pojawia się w:
Materiały Elektroniczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Status report of the VINCY Cyclotron
Autorzy:
Nešković, N.
Ristić-Ðurović, J.
Vorojtsov, S. B.
Belicev, P.
Ivanenko, I. A.
Ćirković, S.
Vorozhtsov, A. S.
Bojović, B.
Dobrosavljević, A.
Vujović, V.
Comor, J. j.
Pajović, S. B.
Powiązania:
https://bibliotekanauki.pl/articles/146191.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
accelerators
cyclotrons
ion sources
radioisotopes
radiation research
Opis:
The VINCY Cyclotron is the main part of the TESLA Accelerator Installation. The diameter of the pole of this machine is 2000 mm. Its bending constant is 145 MeV while its focusing constant is 75 MeV. The radiofrequency system of the machine consists of two l/4-resonators with the eigenfrequency in the range from 17 to 31 MHz. Ions coming from a heavy ion source or a light ion source will be injected into the machine axially. They will be introduced into its median plane by a spiral inflector. Heavy ions accelerated in the machine will be extracted from it by a foil stripping system or by an electrostatic deflection system. Light ions will be extracted from it by the foil stripping system. The first programs of use of the VINCY Cyclotron are related to routine and experimental production of radioisotopes and radiopharmaceuticals, and to biomedical research with ion beams. The first beam extracted from the machine will be the proton beam of the energy of 22 MeV obtained from the H2+ beam extracted from the light ion source. This beam will be used first for production of radioisotope 18F and radio-pharmaceutical 18FDG, to be employed for positron emission tomography
Źródło:
Nukleonika; 2003, 48,suppl.2; 135-139
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Operation modes of the FALCON ion source as a part of the AMS cluster tool
Autorzy:
Girka, O.
Bizyukov, A.
Bizyukov, I.
Gutkin, M.
Mishin, S.
Powiązania:
https://bibliotekanauki.pl/articles/146245.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
FALCON
ion source
surface wave
cluster tool
Opis:
The paper investigates the options to increase the production yield of temperature compensated surface acoustic wave (SAW) devices with a defi ned range of operational frequencies. The paper focuses on the preparation of large wafers with SiO2 and AlN/Si3N4 depositions. Stability of the intermediate SiO2 layer is achieved by combining high power density UV radiation with annealing in high humidity environment. A uniform thickness of the capping AlN layer is achieved by local high-rate etching with a focused ion beam emitted by the FALCON ion source. Operation parameters and limitations of the etching process are discussed.
Źródło:
Nukleonika; 2015, 60, 2; 327-330
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rapidity distributions of strange particles in Pb-Pb at 158 AGeV
Autorzy:
Bruno, G.
Powiązania:
https://bibliotekanauki.pl/articles/148576.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
relativistic heavy-ion collisions
strangeness
rapidity distributions
Opis:
The production at central rapidity of KS0, Lambda, Teta and Omega particles in Pb-Pb collisions at 158 AGeV has been measured by the NA57 experiment over a centrality range corresponding to the most central 53% of the inelastic Pb-Pb cross section. We present the rapidity distribution of each particle in the central rapidity unit. The distributions are analysed based on hydrodynamical models of the collisions.
Źródło:
Nukleonika; 2006, 51,suppl.3; 11-15
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transmembrane segment M2 of glycine receptor as a model system for the pore-forming structure of ion channels.
Autorzy:
Bednarczyk, Piotr
Szewczyk, Adam
Dołowy, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1043689.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
black lipid membrane
ion channels
glycine receptor
Opis:
The glycine receptor belongs to the ligand-gated ion channel superfamily. It is a chloride conducting channel composed of four transmembrane domains. It was previously shown that the second transmembrane domain (M2) of the glycine receptor forms an ion conduction pathway throught lipid bilayers. The amino-acid sequence of the transmembrane segment M2 of the glycine receptor has a high homology to all receptors of the ligand-gated ion channel superfamily. In our report, we have used a synthetic M2 peptide. It was incorporated into a planar membrane of known lipid composition and currents induced by M2 were measured by the Black Lipid Membrane technique. When the planar lipid bilayer was composed of 75% phosphatidylethanolamine and 25% phosphatidylserine, the reversal potential measured in a 150/600 mM KCl (cis/trans) gradient was -19 mV suggesting that the examined pore was preferential to anions, PK/PCl = 0.25. In contrast, when 75% phosphatidylserine and 25% phosphatidylethanolamine was used, the reversal potential was +20 mV and the pore was preferential to cations, PK/PCl = 4.36. Single-channel currents were recorded with two predominant amplitudes corresponding to the main-conductance and sub-conductance states. Both conductance states (about 12 pS and 30 pS) were measured in a symmetric solution of 50 mM KCl. The observed single-channel properties suggest that the selectivity and conductance of the pore formed by the M2 peptide of the glycine receptor depend on the lipid composition of the planar bilayer.
Źródło:
Acta Biochimica Polonica; 2002, 49, 4; 869-875
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NMR-based localization of ions involved in salting out of hen egg white lysozyme
Autorzy:
Poznański, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/1041259.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ion binding
salting out
NMR
HEWL
lysozyme
Opis:
NaCl-induced aggregation of hen egg white lysozyme (HEWL) was monitored by NMR spectroscopy. Small, but significant, changes induced by salt addition in TOCSY spectra were attributed to the effect of local reorganization of protein backbone upon ion binding. Salt-induced variations in HN and Hα chemical shifts were mapped on the HEWL 3D structure which allowed the construction of a scheme of the spatial localization of potential ion binding sites. It was found that in a 0.5 M NaCl solution six chloride anions and at least one sodium cation are bound to preferred sites on the HEWL surface.
Źródło:
Acta Biochimica Polonica; 2006, 53, 2; 421-424
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of sintering temperature of hydroxyapatite on biological and physicochemical properties of alginate/HA biomaterials for regenerative medicine applications
Autorzy:
Kazimierczak, P.
Syta, E.
Sochan, J.
Ginalska, G.
Przekora, A.
Powiązania:
https://bibliotekanauki.pl/articles/284206.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
ion reactivity
bone scaffolds
alginate
water uptake
Opis:
Synthetic hydroxyapatite (HA) has gained considerable attention in regenerative medicine over recent decades. It is widely used as a bone filler and constituent of various biomaterials. HA possesses high biocompatibility, osteoconductivity, bioactivity, and bioresorbability. There are many different synthesis methods for HA described in the available literature. It is worth noticing that even slight changes in pH, reaction conditions or chemical composition during synthesis, can influence biological, physicochemical, and mechanical properties of resultant HA. The aim of this study was to evaluate the impact of sintering temperature of hydroxyapatite on biological and physicochemical properties of biomaterial made of alginate and hydroxyapatite granules. Alginate/HA material was produced using HA sintered at temperature of 800oC and HA sintered at temperature of 1150oC. Microstructure of the fabricated biomaterials was visualized by SEM. Osteoblast growth on the composites was assessed using human foetal osteoblast cell line. Moreover, ion reactivity, plasma/serum protein adsorption ability as well as water/NaCl uptake capability of the biomaterials were compared. Obtained results demonstrated that although both biomaterials had the same chemical composition, composite comprising hydroxyapatite sintered at temperature of 1150oC had smoother surface, revealed lower ion reactivity, was more favourable to osteoblast growth, and adsorbed lower amount of fibrinogen (which is known to promote biomaterial-induced inflammatory response), compared to the material made of hydroxyapatite sintered at temperature of 800oC. Thus, the type of bioceramics used for the production of biomaterials should be tailored to their specific applications – bone fillers for primarily in vivo implantation or in vitro cell-seeded scaffolds.
Źródło:
Engineering of Biomaterials; 2018, 21, 145; 16-19
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of ovalbumin on pyrite flotation in the absence and presence of metal ions
Autorzy:
Guler, T.
Sahbudak, K.
Akdemir, U.
Cetinkaya, S.
Powiązania:
https://bibliotekanauki.pl/articles/110499.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
pyrite
ovalbumin
metal ion
flotation
redox potential
Opis:
Recovery of gangue pyrite and its accidental activation are vital issues in flotation of complex sulfide ores. This work was performed by cyclic voltammetry (CV) and flotation tests to elucidate applicability of ovalbumin (OVA) as depressant for pyrite. The synergetic effect of metal ions in addition to its possible use in case of accidental activation by metal ions. CV tests stated that OVA adsorbed irreversibly on pyrite, and restricted electron transfer up to moderately oxidizing potentials due to electrostatic interaction together with weak hydrophobic interactions. At highly oxidizing potentials, adsorption occurred through electrochemical mechanisms through formation of metal-OVA chelates. Rate of pyrite depression with OVA was found to be potential dependent reaching its peak point around moderately oxidizing potentials both in absence and presence of metal ions. Electrochemically active metals display synergetic effect with OVA on pyrite depression, whereas noble metals activate pyrite and reduced depressing potency of OVA.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 1; 31-40
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wettability of the surface of bacterial cellulose film modified with the ion implantation
Autorzy:
Betlej, Izabela
Barlak, Marek
Wilkowski, Jacek
Werner, Zbigniew
Zagórski, Jerzy
Lipska, Karolina
Boruszewski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2171751.pdf
Data publikacji:
2022
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
bacterial cellulose
wettability
surface modification
ion implantation
Opis:
Wettability of the surface of bacterial cellulose film modified with low energy ion implantation The paper presents the preliminary results of the modification on the water wettability of cellulose, using ion implantation method. Two kinds ions of the noble gases, i.e. helium and argon were implanted with fluences of 1e15 nand 1e16 cm-2, and with the ion energy of 60 keV. The measurements of the contact angle values show the different influence of both types ions on the hydrophobicity of the modified cellulose, but the hydrophobicity of implanted cellulose increases in all cases. The real investigations were supplemented with the modelling results of the depth profiles of the implanted ions and the main parameters of the modelled peaks.
Zwilżalność powierzchni celulozy bakteryjnej modyfikowanej metodą implantacji jonów. Artykuł przedstawia wstępne wyniki modyfikacji na zwilżalność wodą implantowanej jonami celulozy. W badaniach wykorzystano dwa rodzaje gazów szlachetnych, tj. hel i argon. Implantowane dawki wynosiły 1e15 i 1e16 cm-2, a energia jonów 60 keV. Pomiary kąta zwilżania pokazują różny wpływ obydwu typów jonów na hydrofobowość modyfikowanej celulozy, jednakże hydrofobowość wzrasta we wszystkich przypadkach. Badania zostały uzupełnione wynikami modelowania głębokosciowych profili implantowanych jonów i głównych parametrów modelowanych pików.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2022, 118; 15--21
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Capabilities of Thomson parabola spectrometer in various laser-plasma- and laser-fusion-related experiments
Autorzy:
Tchórz, Przemysław
Szymański, Maciej
Rosiński, Marcin
Chodukowski, Tomasz
Borodziuk, Stefan
Powiązania:
https://bibliotekanauki.pl/articles/2202568.pdf
Data publikacji:
2023
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
acceleration
diagnostic
ion
laser
plasma
Thomson spectrometer
Opis:
The Thomson parabola spectrometer (TPS) [1] is a well-known, universal diagnostic tool that is widely used in laser plasma experiments to measure the parameters of accelerated ions. In contrast to other popular ion diagnostics, such as semiconductor detectors or ion collectors, the TPS is not greatly affected by electromagnetic pulses generated during high-power laser interaction with matter and can be tuned to acquire data in various energy ranges of accelerated ions, depending on the goal of the experiment. Despite the many advantages of this diagnostic device, processing the collected data is a diffi cult task and requires a lot of caution during interpretation of gathered results. In this work, we introduce the basic principles of operation and data analysis based on the numerical tool created specifi cally for the TPS designed at the Institute of Plasma Physics and Laser Microfusion, present a range of data obtained during various recent experiments in which our TPS was used, and highlight the diffi culties in data analysis depending on the purpose of the experiment and the experimental setup.
Źródło:
Nukleonika; 2023, 68, 1; 29--36
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Z-ion Zeolite Substrate on Growth of Zea mays L. as Energy Crop Growing on Marginal Soil
Autorzy:
Chomczyńska, Mariola
Zdeb, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/123570.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
marginal soils
energy crops
Z-ion substrate
Opis:
The presented study aimed at determining the influence of the increasing dose of new Z-ion zeolite substrate on the growth of maize (Zea mays L.) as species belonging to energy crops. In order to achieve the study aim, the pot experiment was carried out where the plants were grown on six series of media i.e.: on marginal soil (the control series I), on arable soil (the control series II) and on four mixtures of marginal soil with increasing Z-ion substrate addition (1%, 2%, 5%, 10 % v/v). The pot test was carried out in a phytotron with a 13/11 light/dark regime. After the end of the experiment, the mean values of the vegetative parameters (wet and dry biomass of roots and stems) characterizing the plant growth in particular media series were determined. The C:N ratio for maize stems was calculated as well. The obtained study results showed a favorable influence of Z-ion substrate additions on the vegetative growth of maize. Already a 1% (v/v) substrate addition to marginal soil increased the wet and dry stems biomass by 173–204%. At the same time, it turned out that in the sixth week of plant growth, a 5% substrate addition to the marginal soil enables to achieve the value of vegetation parameters at a level similar to that of the parameters characterizing the plant development on arable land. Thus, at an early stage of plant growth, a 5% substrate dose can be considered as one allowing a similar course of maize growing on marginal soil as in the case of arable soil. It is worth noting that at this substrate dose, the C:N ratio in maize stems reached the value of 13.05, at which the plant biomass is the substrate ensuring the fairly proper course of methane fermentation supplying fuel in the form of biogas.
Źródło:
Journal of Ecological Engineering; 2019, 20, 9; 253-260
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multifunctional Coagulants Based on Hidrocarboaluminates Calcium
Autorzy:
Sizyakova, E. V.
Ivanov, P. V.
Powiązania:
https://bibliotekanauki.pl/articles/124466.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
hidrocarboaluminates calcium
water treatment
coagulant
ion exchanger
Opis:
The article describes harmful factors from the environmental point of view that accompany almost all stages of the production of non-ferrous metals. Due to the fact that this industry requires large volume of water, these factors require special attention when cleaning wastewater. The contamination of wastewater by non-ferrous metallurgy is characterized by metal ions, particulate pollutants, acids, SAS, etc. A common feature of all these substances is harmfulness, however, they are often very aggressive and toxic. The article focuses on the possible use of hidrocarboaluminates calcium as an active ion exchanger for cleanup wastewater metallurgical production.
Źródło:
Journal of Ecological Engineering; 2017, 18, 2; 16-20
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical models of ion transport through cell membrane channels
Autorzy:
Miękisz, Jacek
Gomułkiewicz, Jan
Miękisz, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/748548.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
ion channels, ion transport, Poisson-Nernst-Planck equations, non-equilibrium statistical mechanics, Kawasaki dynamics, driven lattice gases
Opis:
We discuss various models of ion transport through cell membrane channels. Recent experimental data shows that sizes of some ion channels are compared to those of ions and that only few ions may be simultaneously in any single channel. Theoretical description of ion transport in such channels should therefore take into account stochastic fluctuations and interactions between ions and between ions and channel proteins. This is not satisfied by macroscopic continuum models based on the Poisson-Nernst-Planck equations. More realistic descriptions of ion transport are offered by microscopic molecular and Brownian dynamics. We present a derivation of the Poisson-Nernst-Planck equations. We also review some recent models such as single-file diffusion and Markov chains of interacting ions (boundary driven lattice gases).Such models take into account discrete and stochastic nature of ion transport and specifically interactions between ions in ion channels.
Źródło:
Mathematica Applicanda; 2014, 42, 1
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorbent Characterization from Cocoa Shell Pyrolysis (Theobroma cacao L) and its Application in Mercury Ion Reduction
Autorzy:
Nursiah, Cut
Desvita, Hera
Elviani, Elviani
Farida, Nurlia
Muslim, Abrar
Rosnelly, Cut Meurah
Mariana, Mariana
Suhendrayatna, Suhendrayatna
Powiązania:
https://bibliotekanauki.pl/articles/24202895.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
characterisation
pyrolysis
adsorbent
cocoa shell
mercury ion
Opis:
In this paper, we describe the characterization and application of adsorbent derived from the pyrolysis of cocoa shells, which is a natural source of adsorbent materials. The adsorbent that was used in this experiment is an environmentally friendly adsorbent that was prepared by the pyrolysis of cocoa shells. For 1.5 hours, the pyrolysis process was carried out at temperatures ranging from 300 to 380 °C. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, and analysis with an X-ray diffraction (XRD) analyzer. Water-ash content and iodine absorption capacity were also determined in accordance with SNI 06-3730-1995. At a contact time of 90 minutes, the adsorption capacity of mercury ions was found to be 0.106 mg/gram. In this study, the adsorption of mercury ions with the adsorbent followed pseudo-second-order models with an R2 value of 0.9929.
Źródło:
Journal of Ecological Engineering; 2023, 24, 6; 366--375
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recovery of crystalline glucose from the last green syrup (so called hydrol)
Odzyskiwanie krystalicznej glukozy z ostatniego odcieku tzw. hydrolu
Autorzy:
Nebesny, E.
Sroczyński, A.
Powiązania:
https://bibliotekanauki.pl/articles/1399007.pdf
Data publikacji:
1987
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
improvement of hydro!
glucose
glucoamylase ion exchanger
Opis:
Hydrol was refined and saccharified enzymatically, following which its glucose was crystallized directly or in a mixture with starch hydrolysate.
W przeprowadzonych doświadczeniach, ostatni odciek po krystalizacji glukozy tzw. hydrol o wartości 64 DE, stanowiący produkt uboczny hydrolizy skrobi metodą kwas-enzym poddawano rafinacji wymieniaczami jonowymi (kationitem i anionitem) oraz żywicą adsorpcyjną w celu usunięcia zanieczyszczeń mineralnych i organicznych (tab. 1), w tym głównie białka surowego. Następnie oczyszczony hydrol scukrzono glukoamylazą (0,25%s. s.) w temp. 60°C przy pH 4,5 w ciągu kilku dni (tab. 2). Jednocześnie scukrzano glukoamylazą hydrolizat skrobi o ok. 22 DE po wstępnej kwasowej hydrolizie i mieszaninę hydrolu rafinowanego i hydrolizatu w stosunku 1: 4. Uzyskano znaczne scukrzenie hydrolu rafinowanego do wartości 86 DE, równającej się redukcyjności soku glukozowego produktu II. Scukrzanie glukoamylazą mieszaniny hydrolu i hydrolizatu pozwoliło osiągnąć redukcyjność 92,8 DE zbliżoną do wartości 94,4 DE soku glukozowego produktu I (samego hydrolizatu). Przeprowadzona analiza składu węglowodanowego hydrolu surowego i hydrolu rafinowanego po jego scukrzeniu glukoamylazą pozwoliła stwierdzić podwyższenie prawie 1,5-krotne zawartości glukozy i obniżenie do około połowy zawartości izomaltozy i izomaltotriozy w s. s. hydrolu oraz praktycznie zanik pozostałych oligosacharydów rj. maltozy i jej wyższych homologów. Po zagęszczeniu wymienionych roztworów, scukrzonych glukoamylazą, do ok. 72 Bx i zaszczepieniu ich 1,25% monohydratu glukozy krystalicznej, przeprowadzono w ciągu 2-4 dni w temperaturze stopniowo obniżanej z 44°C krystalizację w nich glukozy. W wyniku tego procesu uzyskano 36,2% glukozy krystalicznej (w przeliczeniu na bezwodną) z hydrolu rafinowanego scukrzonego a nawet 42,4% wykrystalizowanej glukozy z mieszaniny hydrolu i hydrolizatu skrobi (1 : 4) to jest ilość zbliżoną do glukozy wykrystalizowanej z czystego hydrolizatu skrobi- 44,1%, co jest dobrym rezultatem. Powyższe wyniki mają istotne znaczenie z uwagi na kilkakrotnie wyższą cenę glukozy krystalicznej niż glukozy zawartej w hydrolu.
Źródło:
Acta Alimentaria Polonica; 1987, 13, 4; 342-349
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of glyphosate in water samples with the combination of cation-exchange chromatography and capillary electrophoresis
Autorzy:
Khrolenko, M.
Dżygiel, P.
Wieczorek, P.
Powiązania:
https://bibliotekanauki.pl/articles/347017.pdf
Data publikacji:
2003
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:
glyphosate
ion-exchange chromatography
capillary electrophoresis
pesticides
Opis:
An analytical method for determination of pesticide Glyphosate in water as a combination of cation-exchange chromatography and capillary electrophoresis is presented. Pure water was spiked with Glyphosate at concentrations 0.1, 0.25, 0.5 and 1 mM and percolated through a strong cation-exchange column packed with Dowex 50WX4-400 resin in its H+ form. The extract was further analyzed by capillary electrophoresis in indirect detection mode. The calibration curve for the pesticide in the range 0.1–2.5 mM was linear and with high degree of reproducibility. The obtained recoveries for all the studied concentrations amount 85%. Afterwards, the possibility to determine Glyphosate at the concentration 0.001mM (0.17 µg/ml) was checked by percolation of 100 ml of water sample through a column. The calculated recovery was 97.7%
Źródło:
Ars Separatoria Acta; 2003, 2; 56-63
1731-6340
Pojawia się w:
Ars Separatoria Acta
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the nature of changes in the optical characterization produced in sapphire on its irradiation with a pulsed powerful stream of hydrogen ions
Autorzy:
Gribkov, V.
Ivanov, L.
Maslyaev, S.
Pimenov, V.
Sadowski, M.
Skladnik-Sadowska, E.
Banaszak, A.
Kopeć, G.
Cheblukov, Y.
Kozodaev, M. A.
Suvorov, A. L.
Smirnov, I. S.
Powiązania:
https://bibliotekanauki.pl/articles/147991.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
optical characteristics
irradiation
fast ion stream
morphology
Opis:
Changes in the optical characteristics in synthetic sapphire specimens produced by microsecond pulse irradiation with a stream of hydrogen ions of energies ranging up to tens keV have been observed. Data on decrease in the optical reflection, measured within the wavelength range of 200 900 nm, are presented. This characterization is compared with the data received by optical and atomic force microscopy as well as by lattice structure analysis performed with X-rays. The measurements indicate that the changes of optical parameters are not a consequence of absorption increase and/or sapphire decomposition. They result from modifications of the morphology and structure of surface layer of the sapphire samples, induced by irradiation.
Źródło:
Nukleonika; 2004, 49, 2; 43-49
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Complementary Potential in Plasma Nitriding Processes of Technical Titanium
Autorzy:
Pilarska, M.
Frączek, T.
Maźniak, K.
Powiązania:
https://bibliotekanauki.pl/articles/354692.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
plasma nitriding
active screen
titanium
ion nitriding
Opis:
This article deals with the testing of surface layers produced on technical titanium Ti99.2 under glow discharge conditions. In order to determine the effect of process temperature on the produced surface layers, nitriding processes were carried out at 700°C and 800°C and for 3 and 5 hours. The research results on evaluating the properties of the obtained surface layers and the characterization of their morphology were presented. The impact of the adopted nitriding process variant on the quality of the obtained layers was evaluated. It was demonstrated that the use of the supplementary potential during the ion nitriding process reduces the unwanted edge effect, which results in a significant increase in the homogeneity of the nitrided layers and improves the functional properties of the technical titanium Ti99.2.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1637-1642
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Change of silica luminescence due to fast hydrogen ion bombardment
Autorzy:
Zhurenko, V. P.
Kalantaryan, O. V.
Kononenko, S. I.
Powiązania:
https://bibliotekanauki.pl/articles/146688.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
luminescent spectrum
absorption dose
ion implantation
silica
Opis:
This paper deals with the luminescence of silica (KV-type) induced by beam of hydrogen ions with the energy of 210 keV per nucleon. An average implantation dose of up to 3.5 × 1021 cm–3 (5 × 1010 Gy) was accumulated during irradiation over an extended period. The luminescent spectra consisted of the blue band (maximum at 456 nm) and the red band (650 nm) in the visible range. It was shown that increase in the absorption dose had an effect on the silica luminescence. It was found that the most significant changes in the spectrum occurred during the dose accumulation in the region of 550–700 nm. The shape of the spectrum of the luminescent radiation in this wavelength range was affected both by the oxygen deficient centres (blue band) and non-bridging oxygen hole centers (red band). Mathematical processing of the experimental spectra permitted to identify contributions to the luminescent radiation coming from both types of defects.
Źródło:
Nukleonika; 2015, 60, 2; 289-292
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High - temperature oxidation resistance in yttrium implanted stainless steel
Autorzy:
Barlak, M.
Piekoszewski, J.
Werner, Z.
Sartowska, B.
Waliś, L.
Starosta, W.
Kierzek, J.
Kowalska, E.
Wilhelm, R. A.
Pochrybniak, C.
Woźnica, M.
Powiązania:
https://bibliotekanauki.pl/articles/146785.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
high-temperature oxidation resistance
ion implantation
yttrium
Opis:
Austenitic AISI 304, 316L and ferritic 430 stainless steels were implanted with yttrium to fluences ranging between 1 x 1015 and 5 x 1017 ions/cm2. The samples were subjected to oxidation in air at a temperature of 1000 centigrade for a period of 100 h and next examined by stereoscopic optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX) and Rutherford back scattering spectrometry (RBS). The results obtained with the use of ion implantation are discussed.
Źródło:
Nukleonika; 2012, 57, 4; 473-476
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies of plasma and craters produced by the interaction of high-energy sub-nanosecond laser with silver target
Autorzy:
Woryna, E.
Badziak, J.
Parys, P.
Suchańska, R.
Wołowski, J.
Krása, J.
Láska, L.
Pfeifer, M.
Rohlena, K.
Ullschmied, J.
Powiązania:
https://bibliotekanauki.pl/articles/147102.pdf
Data publikacji:
2002
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ion beam
laser
laser-induced crater
plasma
Opis:
The results of measurements of microablation from a silver target irradiated by the high-power PALS laser system in Prague are presented. In this experiment the laser beam of energy of about 110 J in a 400 ps pulse was focused perpendicularly to the massive silver target. The target surface position was changed with respect to the focal spot of the laser beam in the range from -2.5 to 2.5 mm. A set of four ion collectors was used for plasma ion emission measurements. The effect of the laser pulse interaction with the target, i.e. craters and damages formed in the vicinity of the craters, were investigated with the use of scanning electron microscopy (SEM) and optical microscopy methods. The characteristics of the crater were compared with the essential parameters of ion streams emitted from the plasma produced in the same laser shot.
Źródło:
Nukleonika; 2002, 47, 4; 147-150
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Azimuthally-sensitive interferometry and the source lifetime at RHIC
Autorzy:
Lisa, M.
Powiązania:
https://bibliotekanauki.pl/articles/147422.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
interferometry
HBT
heavy-ion collisions
freeze-out
Opis:
Pion interferometry (HBT) measurements relative to the reaction plane provide an estimate of the transverse source anisotropy at freeze-out, which probes the system dynamics and evolution duration. Measurements by the STAR Collaboration indicate that the source is extended increasingly out-of-plane with increasing impact parameter, suggesting a short evolution duration roughly consistent with estimates based on azimuthally-integrated HBT measurements.
Źródło:
Nukleonika; 2004, 49,suppl.2; 71-76
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternative size and lifetime measurements for RHIC
Autorzy:
Pratt, S.
Powiązania:
https://bibliotekanauki.pl/articles/147468.pdf
Data publikacji:
2004
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
interferometry
identical particles
heavy ion collision
correlations
Opis:
Two-particle correlations based on the interference of identical particles have provided the chief means for determining the shape and lifetime of sources in relativistic heavy ion collisions (RHIC). Here, strong and Coulomb induced correlations are shown to provide similar information.
Źródło:
Nukleonika; 2004, 49,suppl.2; 61-65
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chlorates(VII) removal on Dowex™PSR-2 resin
Autorzy:
Kołodyńska, Dorota
Łyko, Aleksandra
Gęca, Marzena
Hubicki, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/764134.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
chlorates
removal
ion exchange
Dowex™PSR-2
Opis:
Lately there has been observed the increased presence of chlorates(VII) in the natural environment which can affect human health negatively. Therefore the removal of chlorate(VII) ions using the gel type resin functionalized with the tri-n-butyl ammonium (Dowex™PSR-2) from waters was studied. The main aim was to evaluate the effects of experimental conditions including contact time, initial solution concentration, pH and temperature on chlorate(VII) ions removal as well as the anion exchanger properties on chlorate(VII) ions sorption. It was found that only the pseudo second order model described the experimental data well and the intraparticle diffusion was not the rate-limiting step. According to the Freundlich model, the qe value was to be 69.26 mg/g at optimum conditions (pH 7.0 at 25 oC).
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2016, 71, 1
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of dissolved mineral species in quartz flotation and siderite solubility simulation
Autorzy:
Luo, X.
Wang, Y.
Ma, M.
Song, S.
Zhang, Y.
Deng, J.
Liu, J.
Powiązania:
https://bibliotekanauki.pl/articles/109459.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quartz
solubility
siderite
calcium ion
temperature
flotation
Opis:
Quartz is, in most cases, the major gangue mineral found in the iron ores. Although it can be activated by calcium at strong alkaline pH, quartz nevertheless, reports to the concentrate with Fe when the iron ores contain siderite. It causes a poor concentrate grade and separation between quartz and iron minerals. The effect of siderite on reverse anionic flotation of quartz from hematite was studied in our previous investigations. In this work, the effect of siderite dissolution on the quartz recovery in the froth product and the effect of pH, ions and temperature on siderite dissolution were investigated. Microflotation, PHREEQC simulation, solution chemistry calculation and Fourier transform infrared spectroscopy (FTIR) measurements were conducted. It was observed that the dissolved species of siderite exhibited negative impact on quartz flotation. This influence became weak to some extent by either stripping the dissolved species or shortening dissolution time. Siderite was easily dissolved in the presence of calcium ion under strong alkaline conditions and its solubility increased with increasing the calcium ion concentrate and temperature. When the calcium ion was added as an activator of quartz under strong alkaline conditions (pH>9.96), calcium existed mainly in the CaCO3 precipitation form according to the solubility rule in the presence of siderite. This form could adsorb onto quartz surfaces and further the chemical reaction between starch and quartz was monitored by FTIR measurements. This study provides a further supplement for previous study. A potential strategy is suggested that finding a collector used at low temperature or flotation under neutral (or weak alkaline) medium is helpful to the reverse flotation of iron ores containing siderite.
Źródło:
Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1241-1254
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Beneficial effects and mechanism of lead ion on wolframite flotation
Autorzy:
Yang, S.
Qiu, X.
Peng, T.
Chang, Z.
Feng, Q.
Zhong, C.
Powiązania:
https://bibliotekanauki.pl/articles/109484.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
activator
wolframite
lead ion
benzohydroxamic acid
flotation
Opis:
In this study the effects and mechanism of lead ions influence on wolframite flotation with benzohydroxamic acid (BHA) were studied through micro-flotation, adsorption experiments, zeta potential measurements, logarithmic concentration diagram, and X-ray photoelectron spectroscopy. It was observed that lead ions could significantly enhance the recovery of wolframite in flotation and adsorption density of collector BHA onto the wolframite surface. The results showed that Pb existed in the forms of lead ion, monohydric lead, and lead hydroxide at the water-wolframite interface respectively, at three pH ranges. They increased the zeta potential of wolframite. However, the zeta potential of wolframite was still negative, resulting in repulsive electrostatic force to anionic collector BHA. Combining with XPS spectra, it revealed the chemisorption of BHA onto the wolframite surface. In addition, PbO or Pb(OH)2 was observed on the wolframite surface due to the reaction between lead ions and wolframite. These reaction products increased the adsorption site of BHA on the wolframite surface because Pb-hydroxamate was found on the wolframite surface.
Źródło:
Physicochemical Problems of Mineral Processing; 2016, 52, 2; 855-873
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of copper ions on malachite sulfidization flotation
Autorzy:
Yin, Wanzhong
Sheng, Qiuyue
Ma, Yingqiang
Sun, Haoran
Yang, Bin
Tang, Yuan
Powiązania:
https://bibliotekanauki.pl/articles/110331.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
malachite
sulfidization flotation
Cu2+ ion
depression
Opis:
In this study, the effects of copper ions (Cu2+) on the sulfidization (Na2S) flotation of malachite was investigated using micro-flotation experiments, zeta-potential measurements, X-ray photoelectron spectroscopy (XPS) analysis, adsorption experiments, and Materials Studio simulation. The results indicated that the flotation recovery of malachite decreased after the pretreatment of the mineral particles with Cu2+ ions prior to the addition of Na2S. The results for zeta-potential measurements and XPS analysis revealed that less sulfide ion species in the pulp solution transferred onto the mineral surface, the sulfidization of malachite surface weakened. The adsorption amount of collector on the mineral surface decreased, and this finding was confirmed by the results of the zeta-potential and adsorption experiments. Materials Studio simulation revealed that the adsorption energy of HS- ions and C4H9OCSS- ions on malachite surface increased after the adding of Cu2+ ion. The competitive adsorption made Cu2+ ions depress sulfidization flotation of malachite, the dissolution of mineral surface affected the adsorption of reagents on it, and decreased the floatability of malachite.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 2; 300-312
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal Desorption of Argon Implanted into Gallium Arsenide
Autorzy:
Turek, Marcin
Droździel, Andrzej
Pyszniak, Krzysztof
Węgierek, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2201837.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thermal desorption spectroscopy
gallium arsenide
ion implantation
Opis:
Thermal desorption of Ar implanted with energies 150 keV and 100 keV with fluence 1×10^16 cm^-2 into GaAs is considered. A sudden release of Ar is observed in temperature range 1100 -1180 K as a single narrow peak in TDS (Thermal Desorption Spectroscopy) spectra. This is accompanied by a strong background signal from atmospheric Ar trapped in various parts of the spectrometer. Desorption peak shift analysis allows estimation of desorption activation energy values - these are 3.6 eV and 2.5 eV for implantation energies 150 keV and 100 keV, respectively. These results are comparable to that measured for Ar implanted into germanium target.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 4; 318--326
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł

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