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Browsing by Subject "spectroscopy"

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    • Article  

      Alpha spectroscopic analysis of actinides (Th, U and Pu) after separation from aqueous solutions by cation-exchange and liquid extraction 

      Kiliari, T.; Pashalidis, Ioannis (2010)
      The radioactivity concentration of 236Pu, 232U and 228Th in aqueous samples has been determined by means of alpha spectroscopy after chemical separation and pre-concentration of the radionuclides by cation exchange and ...

    • Article  

      Authenticity of the traditional Cypriot spirit "zivania" on the basis of metal content using a combination of coupled plasma spectroscopy and statistical analysis 

      Kokkinofta, Rebecca I.; Petrakis, Panos V.; Mavromoustakos, Thomas M.; Theocharis, Charis R. (2003)
      Sixty-eight alcoholic beverages ranging in alcoholic degree between 40 and 55 from different countries were analyzed for their 16 most abundant metal elements using inductively coupled plasma (ICP) spectroscopy. The results ...

    • Article  

      Charge generation in inorganic/organic photovoltaic blends 

      Westenhoff, S.; Hayes, Sophia C.; Greenham, N. C.; Silva, C. (2004)
      We apply ultrafast spectroscopy to investigate charge generation kinetics in blends of semiconducting polymers and cadmium selenide nanocrystals with photovoltaic applications. The rate is limited by diffusion of the primary ...

    • Article  

      Effective complex formation in the interaction of 1,2-dimethyl-3-hydroxypyrid-4-one (Deferiprone or L1) with uranium(VI) 

      Pashalidis, Ioannis; Kontoghiorghes, G. J. (1999)
      In an effort to develop new chelating agents for the decorporation of uranium and other actinides, the interaction of the clinically used 1,2-dimethyl-3-hydroxypyrid-4-one (Deferiprone or LI) with hexavalent uranium was ...

    • Article  

      Halogen derivatives of m-phenylene(carbeno)nitrene: A switch in ground-state multiplicity 

      Enyo, T.; Nicolaïdes, Andrew N.; Tomioka, H. (2002)
      m-Phenylene-coupled carbenonitrenes [(3-nitrenophenyl)methylene (2-H), (3-nitrenophenyl)fluoromethylene (2-F), (3-nitrenophenyl)chloromethylene (2-Cl), (3-nitrenophenyl)bromomethylene (2-Br)] have been investigated ...

    • Article  

      Insulin-mimetic action of vanadium compounds on osteoblast-like cells in culture 

      Etcheverry, S. B.; Crans, D. C.; Keramidas, Anastasios D.; Cortizo, A. M. (1997)
      Vanadium compounds mimic insulin actions in different cell types. The present study concerns the insulin-like effects of three vanadium(V) derivatives and one vanadium(IV) complex on osteoblast-like (UMR106 and MC3T3E1) ...

    • Article  

      Interaction between 1,2-dimethyl-3-hydroxypyrid-4-one and europium(III) 

      Hadjiloizou, P.; Pashalidis, Ioannis (2007)
      The interaction of the clinically used 1,2-dimethyl-3-hydroxypyrid-4-one with trivalent europium Eu(III), was investigated by using potentiometric and spectroscopic methods. The stability constants of the EuLn (3-n)+ ...

    • Article  

      o-Phenylene halocarbenonitrenes and o-phenylene chlorocarbenocarbene: A combined experimental and computational approach 

      Enyo, T.; Arai, N.; Nakane, N.; Nicolaïdes, Andrew N.; Tomioka, H. (2005)
      Computations find that o-phenylene(halo)carbenonitrenes 2-XN, X = F, Cl, Br, have quinoidal singlet biradical ground states such as the parent o-phenylenecarbenonitrene (2-HN). Compared to the parent 2-HN, halogen substitution ...

    • Article  

      Photosynthesis from the protein's perspective 

      Skourtis, Spiros S.; Beratan, David N. (2007)

    • Article  

      Probing hadron wave functions in lattice QCD 

      Alexandrou, Constantia; De Forcrand, Ph; Tsapalis, Antonios (2002)
      Gauge-invariant equal-time correlation functions are calculated in lattice QCD within the quenched approximation and with two dynamical quark species. These correlators provide information on the shape and multipole moments ...

    • Article  

      Radiometric determination of uranium in natural waters after enrichment and separation by cation-exchange and liquid-liquid extraction 

      Pashalidis, Ioannis; Tsertos, Haralambos (2004)
      Preconcentration of uranium from natural water samples using Chelex-100 cation-exchange resin, its selective extraction by tributylphosphate and electrodeposition on stainless steel discs is reported. The validity of the ...

    • Article  

      Radiometric determination of uranium in natural waters after enrichment and separation by cation-exchange and liquid-liquid extractionAAA 

      Pashalidis, Ioannis; Tsertos, Haralambos (2004)
      Preconcentration of uranium from natural water samples using Chelex-100 cation-exchange resin, its selective extraction by tributylphosphate and electrodeposition on stainless steel discs is reported. The validity of the ...

    • Article  

      Regeneration of three-way automobile catalysts using biodegradable metal chelating agent-S, S-ethylenediamine disuccinic acid (S, S-EDDS) 

      Subramanian, B.; Christou, Stavroula Y.; Efstathiou, Angelos M.; Namboodiri, V.; Dionysiou, Dionysios Demetriou D. (2011)
      Regeneration of the activity of three-way catalytic converters (TWCs) was tested for the first time using a biodegradable metal chelating agent (S, S-ethylenediamine disuccinic acid (S, S-EDDS). The efficiency of this novel ...

    • Article  

      Seasonal variation, chemical behavior and kinetics of uranium in an unconfined groundwater system 

      Efstathiou, Maria; Aristarchou, T.; Kiliari, T.; Demetriou, Antri; Pashalidis, Ioannis (2014)
      The seasonal changes in the concentration of uranium in an unconfined groundwater system in Cyprus have been investigated and compared to corresponding changes of boron and salinity, to better understand the chemical ...

    • Article  

      Spectroscopic investigation on the formation of hypochlorite by alpha radiolysis in concentrated NaCl solutions 

      Kelm, M.; Pashalidis, Ioannis; Kim, J. I. (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 ...

    • Article  

      Structural properties of SnO2 nanowires and the effect of donor like defects on its charge distribution 

      Zervos, Matthew; Othonos, Andreas S.; Tsokkou, Demetra; Kioseoglou, J.; Pavlidou, E.; Komninou, P. (2013)
      Tin oxide (SnO2) nanowires (NWs) with diameters of 50 nm, lengths up to 100 μm and a tetragonal rutile crystal structure have been grown by low pressure reactive vapour transport on 1 nm Au/Si(001). The free carrier density ...

    • Article  

      Structural properties of SnO2 nanowires and the effect of donor like defects on its charge distribution 

      Zervos, Matthew; Othonos, A.; Tsokkou, D.; Kioseoglou, J.; Pavlidou, E.; Komninou, P. (2013)
      Tin oxide (SnO2) nanowires (NWs) with diameters of 50 nm, lengths up to 100 μm and a tetragonal rutile crystal structure have been grown by low pressure reactive vapour transport on 1 nm Au/Si(001). The free carrier density ...

    • Article  

      Substitution at C-4 in 3,5-disubstituted 4H-1,2,6-thiadiazin-4-ones 

      Ioannidou, Heraklidia A.; Koutentis, Panayiotis Andreas (2012)
      3,5-Diaryl-4H-1,2,6-thiadiazin-4-ones react with NaBH 4 to give the 3,5-diaryl-4H-1,2,6-thiadiazin-4-ols and with MeLi to give 4-methyl-3,5-diaryl-4H-1,2,6-thiadiazin-4-ols. The latter dehydrate with p-toluenesulfonic acid ...

    • Article  

      Synthesis and structural and spectroscopic characterization of a complex between Co(II) and imino-bis(methylphosphonic acid): Gaining insight into biologically relevant metal-ion phosphonate interactions or looking at a new Co(II)-organophosphonate material? 

      Jankovics, H.; Daskalakis, M.; Raptopoulou, C. P.; Terzis, A.; Tangoulis, V.; Giapintzakis, John; Kiss, T.; Salifoglou, A. (2002)
      Cobalt is an essential metal ion involved in key biomolecules, regulating processes in human physiology. As a metal ion, Co(II) assumes forms, which are dictated by the nature of organic binders in biological fluids, and ...

    • Article  

      Synthesis, structure, magnetic properties and aqueous solution characterization of p-hydroquinone and phenol iminodiacetate copper(ii) complexes 

      Stylianou, M.; Drouza, C.; Viskadourakis, Z.; Giapintzakis, John; Keramidas, A. D. (2008)
      The reaction of Cu2+ acetate monohydrate with 2-[N,N′-bis(carboxymethyl)aminomethyl]-4-carboxyphenol (H 4cacp), 2-[N,N-bis(carboxymethyl)aminomethyl]hydroquinone (H 4cah) and the dinucleating 2,5-bis[N,N-bis(carboxymethy ...

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