Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 990-1009 of 1302
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Sorption of Cu(II) and Eu(III) ions from aqueous solution by olive cake
(2007)The sorption of Cu(II) on olive cake, a biomass by-product of olive oil production, has been investigated by potentiometry at pH 6, I=0.1 M NaClO 4, 25∈°C and under atmospheric conditions. Numerical analysis of the ...
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Conference Object
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Sorption of water vapour by partially decomposed calcium hydroxide
(1991)Abstract The surface chemistry of commercial grade calcium hydroxide was studied by sorption methods, thermal analysis and spectroscopy. Part of this investigation was the study of the sorption of water vapour by the ...
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Conference Object
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Spatial characteristics of urinary BTEX concentrations in the general population
(2017)Benzene, toluene, ethylbenzene, o-, m-, and p-xylenes (BTEX) are ubiquitous outdoor and indoor air pollutants associated with both environmental and health effects. The objective of this exploratory study was to determine ...
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Speciation and spectrophotometric determination of uranium in seawater
(2004)A series of ion-exchange and extraction procedures for the separation of uranium from seawater samples and subsequent spectrophotometric determination of uranium in seawater by means of arsenazo(III) is described. According ...
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Article
Speciation in Vanadium Bioinorganic Systems. 5. Interactions between Vanadate, Uridine, and Imidazole - An Aqueous Potentiometric, 51V, 17O, and 13C NMR Study
(1998)The full speciation has been determined in the aqueous vanadate-uridine (UrH2) and vanadate-uridine-imidazole (ImH) systems. The studies performed allow direct comparison with the corresponding adenosine systems, and the ...
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Specific interactions of sodium salts with alanine dipeptide and tetrapeptide in water: Insights from molecular dynamics
(2011)We examine computationally the dipeptide and tetrapeptide of alanine in pure water and solutions of sodium chloride (NaCl) and iodide (NaI), with salt concentrations up to 3 M. Enhanced sampling of the configuration space ...
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Spectophotometric studies on the competitive adsorption of boric acid (B(III)) and chromate (Cr(VI)) onto iron (OXY) hydroxide (Fe(O)OH)
(2012)Various pollutants (e.g. boron and hexavalent chromium) are introduced into the aquatic environment from a variety of industrial operations causing damages to environment and affecting human health. Boron in irrigation ...
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Spectral studies of new organic conductor (ETOEDT-PDT-TTF)2I3: Normal mode vibrations of the unsymmetrical π-electron donor
(2008)New donor-acceptor (ETOEDT-PDT-TTF)2I3 salt showing the layered structure was synthesized and spectrally characterized. It was shown that unsymmetrical (1,4-thioxane-2,3-diyldithio)-propylenedithiotetrathiafulvalene ...
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Spectroscopic characterization of C-4 substituted 3,5-dichloro-4H-1,2,6-thiadiazines
(2015)Three 3,5-dichloro-4H-1,2,6-thiadiazines, which differ according to the electron withdrawing nature of their substituent at C-4: (a) 3,5-dichloro-4-methylene-4H-1,2,6-thiadiazine (5a), (b) 3,5-dichloro-4H-1,2,6-thiadiazin-4-one ...
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Spectroscopic investigation on the formation of hypochlorite by alpha radiolysis in concentrated NaCl solutions
(1999)The hypochlorite formation induced by alpha radiation in saline solutions is studied by UV/VIS spectroscopy. Experiments are carried out in NaCl solutions of various concentrations between 1 and 5 mol/l and with volume ...
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Spectroscopic investigations on the effect of humic acid on the formation and solubility of secondary solid phases of Ln2(CO3) 3
(2011)The formation of secondary Ln(III) solid phases (e.g., Nd 2(CO3)3 and Sm2(CO3) 3) was studied as a function of the humic acid concentration in 0.1 mol/L NaClO4 aqueous solution in the neutral pH range (5-6.5). The solid ...
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Article
Spectroscopic Study of the Hydrolysis of PuO22+ in Aqueous Solution
(1995)The hydrolysis of Pu(VI) is investigated under Ar atmosphere in the pH range between 4.5 and 9.0 at 22°C in 0.1 M NaC104 solution in contact with an initial solid phase, PuO2CO3(s). Under the given conditions, PuO2CO3(s) ...
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Speed selection mechanism for propagating fronts in reaction-diffusion systems with multiple fields
(2002)We introduce a speed selection mechanism for front propagation in reaction-diffusion systems with multiple fields. This mechanism applies to pulled and pushed fronts alike, and operates by restricting the fields to large ...
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Article
Spillover of labile OH, H, and O species in the H2 production by steam reforming of phenol over supported-Rh catalysts
(2006)The aim of this work was to probe the back-spillover of labile O, OH and H species during steam reforming of phenol towards H2 production in the 773-1028 K range over Rh supported on MgO and Mg-Ce-Zr-O mixed-metal oxides. ...
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Article
Spin Crossover in Nitrito-Myoglobin as Revealed by Resonance Raman Spectroscopy
(2016)The myoglobin (Mb) heme Fe-O-N=O and heme Fe-O-N=O/2-nitrovinyl species have been characterized by resonance Raman spectroscopy. In the heme Fe-O-N=O species, the bound nitrite ligand is removed by solvent exchange, thus ...
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Spin-Crossover Phenomenon in Microcrystals and Nanoparticles of a [Fe(2-mpz)2Ni(CN)4] Two-Dimensional Hofmann-Type Polymer: A Detailed Nano-Topographic Study
(2019)The diamagnetic two-dimensional Hofmann-type metal–organic framework [ZnII(2-mpz)2Ni(CN)4] has been successfully synthesized along with its isostructural hysteretic spin-crossover FeII analogue in the form of both bulk ...