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Browsing by Subject "concentration (parameters)"

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    • Article  

      Activated biochar derived from cactus fibres - Preparation, characterization and application on Cu(II) removal from aqueous solutions 

      Hadjittofi, Loukia; Prodromou, Melpomeni; Pashalidis, Ioannis (2014)
      The adsorption efficiency of activated biochar prepared from cactus fibres regarding the removal of Cu(II) from aqueous solutions has been investigated as a function of various physicochemical parameters (e.g. pH, initial ...

    • Article  

      Adsorption of hexavalent chromium on dunite 

      Demetriou, Antri; Pashalidis, Ioannis (2011)
      The paper presents and discusses the effect of various physicochemical parameters (e.g. pH, ionic strength, Cr(VI) initial concentration, amount of the adsorbent, temperature and contact time between metal ion and adsorbent) ...

    • Article  

      Adsorptive removal of U(VI) and Th(IV) from aqueous solutions using polymer-based electrospun PEO/PLLA fibrous membranes 

      Savva, Ioanna; Efstathiou, Maria; Krasia‐Christoforou, Theodora; Pashalidis, Ioannis (2013)
      Fibrous membranes based on poly(ethylene oxide) and poly(l-lactide) fabricated by electrospinning were evaluated for the first time as substrates for the adsorption of tetravalent thorium (Th(IV)) and hexavalent uranium ...

    • Article  

      Adsorptive removal of U(VI) and Th(IV) from aqueous solutions using polymer-based electrospun PEO/PLLA fibrous membranes 

      Savva, I.; Efstathiou, M.; Krasia-Christoforou, T.; Pashalidis, I. (2013)
      Fibrous membranes based on poly(ethylene oxide) and poly(l-lactide) fabricated by electrospinning were evaluated for the first time as substrates for the adsorption of tetravalent thorium (Th(IV)) and hexavalent uranium ...

    • 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  

      Americium and samarium determination in aqueous solutions after separation by cation-exchange 

      Kiliari, T.; Pashalidis, Ioannis (2014)
      The concentration of trivalent americium and samarium in aqueous samples has been determined by means of alpha-radiometry and UV-Vis photometry, respectively, after chemical separation and pre-concentration of the elements ...

    • Article  

      Analysis of polyphenols using capillary zone electrophoresis - Determination of the most effective wine sample pre-treatment method 

      Nicolaou, I. N.; Kapnissi‐Christodoulou, Constantina P. (2010)
      A simple CZE method has been developed for the simultaneous determination of eight polyphenolic compounds. The influence of several experimental conditions such as buffer (concentration and pH) and temperature were studied. ...

    • Article  

      Chiral separation of Huperzine A using CE - Method validation and application in pharmaceutical formulations 

      Tsioupi, Despina A.; Nicolaou, I. N.; Moore, L.; Kapnissi‐Christodoulou, Constantina P. (2012)
      The aim of this work is the development, validation and application of an MEKC method for the chiral separation of Huperzine A. Huperzine A is an important compound that is used to treat Alzheimer's disease. However, only ...

    • Article  

      Chiral separation of the clinically important compounds fucose and pipecolic acid using ce: Determination of the most effective chiral selector 

      Hadjistasi, Christoforos A.; Stavrou, Ioannis J.; Stefan-Van Staden, R. -I; Aboul‐Enein, Hassan Y.; Kapnissi‐Christodoulou, Constantina P. (2013)
      In this study, simple electrophoretic methods were developed for the chiral separation of the clinically important compounds fucose and pipecolic acid. In recent years, these analytes, and particularly their individual ...

    • Article  

      Chiral Separations Using Polymeric Surfactants and Polyelectrolyte Multilayers in Open-Tubular Capillary Electrochromatography 

      Kapnissi‐Christodoulou, Constantina P.; Valle, B. C.; Warner, I. M. (2003)
      In this study, fused-silica capillaries are modified using a polyelectrolyte multilayer (PEM) coating procedure in open-tubular capillary electrochromatography. The PEM coating was constructed in situ with alternating ...

    • Article  

      Combined use of l-alanine tert butyl ester lactate and trimethyl-ß-cyclodextrin for the enantiomeric separations of 2-arylpropionic acids nonsteroidal anti-inflammatory drugs 

      Mavroudi, Maria C.; Kapnissi‐Christodoulou, Constantina P. (2015)
      In this study, a new CE method, employing a binary system of trimethyl-ß-CD (TM-ß-CD) and a chiral amino acid ester-based ionic liquid (AAIL), was developed for the chiral separation of seven 2-arylpropionic acid nonsteroidal ...

    • Article  

      Copper(II) removal from aqueous solutions by adsorption on non-treated and chemically modified cactus fibres 

      Prodromou, Melpomeni; Pashalidis, Ioannis (2013)
      The adsorption efficiency of a biomass by-product (cactus fibres) regarding the removal of copper(II) from aqueous solutions has been investigated before and after its chemical treatment. The chemical treatment of the ...

    • Article  

      Crosslink nature in Cr(III)-polyacrylamide gels 

      Vamvakaki, Maria; Yamasaki, E. N.; Hadjiyannakou, Stella C.; Patrickios, Costas S. (2001)
      The equilibrium constants of various candidates for the crosslinking reaction between chromium(III) and partly hydrolysed polyacrylamide have been calculated. For this purpose use has been made of a) the crosslinking index ...

    • Article  

      Determination of radium by radon emanation after EDTA-mediated sample dissolution 

      Liatsou, Ioanna; Pashalidis, Ioannis (2015)
      The applicability of radon emanation to determine radium levels in (TE)NORM after EDTA-mediated sample dissolution has been investigated by means of a closed recirculating air loop radon monitoring system. Regarding radium ...

    • Article  

      Determination of thorium, uranium and potassium elemental concentrations in surface soils in Cyprus 

      Tzortzis, M.; Tsertos, Haralambos (2004)
      A comprehensive study was conducted to determine thorium, uranium and potassium elemental concentrations in surface soils throughout the accessible area of Cyprus using high-resolution γ-ray spectrometry. A total of 115 ...

    • Article  

      The effect of aging and natural organic matter on the Th(OH)4 solubility 

      Prodromou, Melpomeni; Antoniou, Stella; Pashalidis, Ioannis (2014)
      The solution chemistry of actinides, particularly hydrolysis, is of major importance in the design of nuclear waste repositories and in relation to nuclear fuel reprocessing cycles. In this study the formation and solubility ...

    • Article  

      The effect of physicochemical parameters on the separation recovery of plutonium and uranium from aqueous solutions by cation exchange 

      Kiliari, T.; Pashalidis, Ioannis (2010)
      The effect of physicochemical parameters such as pH, salinity (e.g. [NaCl]) and competitive cation (e.g. Ca 2+ and Fe 3+) concentration on the separation recovery of plutonium and uranium from aqueous solutions by cation ...

    • 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  

      Effects of monovalent anions of the Hofmeister series on DPPC lipid bilayers part I: Swelling and in-plane equations of state 

      Aroti, Andria; Leontidis, Epameinondas; Dubois, M.; Zemby, T. (2007)
      Aiming to improve understanding of the mechanisms behind specific anion effects in biological systems we have studied the effects of sodium salts of simple monovalent anions belonging to the Hofmeister series on the bilayers ...

    • Article  

      Effects of monovalent anions of the Hofmeister series on DPPC lipid bilayers part II: Modeling the perpendicular and lateral equation-of-state 

      Leontidis, Epameinondas; Aroti, Andria; Belloni, L.; Dubois, M.; Zemby, T. (2007)
      The effects of Hofmeister anions on the perpendicular and lateral equation-of-state (EOS) of the dipalmitoylphosphatidylcholine lamellar phase discussed in the companion article are here examined using appropriate free ...

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