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Browsing by Subject "surface property"

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    • 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  

      Attraction of iodide ions by the free water surface, revealed by simulations with a polarizable force field based on drude oscillators 

      Archontis, Georgios Z.; Leontidis, Epameinondas; Andreou, Georgia (2005)
      Recent theoretical and experimental studies have shown that polarizable anions, such as iodide and bromide, preferentially accumulate close to the surface of electrolyte solutions. This finding is in sharp contrast to the ...

    • Article  

      Catalytic activity of high surface area mesoporous mn-based mixed oxides for the deep oxidation of methane and lean-nox reduction 

      Stathopoulos, Vassilis N.; Belessi, Vassiliki C.; Costa, Costas N.; Neophytides, Stylianos G.; Falaras, Polycarpos; Efstathiou, Angelos M.; Pomonis, Phillippos J. (2000)

    • Article  

      Chaotropic salts interacting with soft matter: Beyond the lyotropic series 

      Leontidis, Epameinondas (2016)
      The effects of the chaotropic ions of the Hofmeister series on many systems and phenomena are typically quite pronounced. What happens, however, when one uses chaotropic ions beyond SCN−, ClO4 −, or guanidinium, which are ...

    • Article  

      Competitive adsorption of boric acid and chromate onto alumina in aqueous solutions 

      Demetriou, Antri; Pashalidis, Ioannis (2014)
      The competitive adsorption of boric acid and chromate from aqueous solutions by alumina has been investigated by spectrophotometry at pH 8, ionic strength = 0.0, 0.1 and 1.0 M NaClO4, T = 22 ± 3°C and under normal atmospheric ...

    • 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  

      The effect of sorbed toluene on the surface properties of calcium hydroxide 

      Pashalidis, Ioannis; Theocharis, Charis R. (1998)
      The surface properties of commercial grade calcium hydroxide were studied by nitrogen adsorption isotherm analysis, FTIR spectroscopy (KBr transmission and reflectance) and TGA analysis before and after toluene adsorption. ...

    • 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 ...

    • Article  

      Effects of sol-gel synthesis on 5Fe-15Mn-40Zn-40Ti-O mixed oxide structure and its H2S removal efficiency from industrial gas streams 

      Polychronopoulou, Kyriaki; Efstathiou, Angelos M. (2009)
      A novel Fe-Mn-Zn-Ti-O mixed metal oxide has been developed for efficient low-temperature (25-50°C) removal of H2S from a gas mixture containing 600 ppm H2S, 25 vol% H2, 7.5 vol % CO 2, and 1-3 vol% H2O that simulates typical ...

    • Article  

      Effects of the CePO 4 on the oxygen storage and release properties of CeO 2 and Ce 0.8Zr 0.2O 2 solid solution 

      Larese, C.; Galisteo, F. C.; Granados, M. L.; Mariscal, R.; Fierro, José Luis García; Lambrou, Panayiota S.; Efstathiou, Angelos M. (2004)
      In an attempt to gain fundamental information about the role of P on the chemical deactivation of a three-way catalyst (TWC), P was deliberatively incorporated in CeO 2 and Ce 0.8Zr 0.2O 2 solid solution. XRD, Raman, XPS, ...

    • Article  

      Hofmeister anion effects on surfactant self-assembly and the formation of mesoporous solids 

      Leontidis, Epameinondas (2002)
      Recent work on mesoporous silica formation using cationic and non-ionic templates has unveiled a large number of anion effects. Anions are seen to change the hydrolysis rates of the silicate precursors, affecting the surface ...

    • Article  

      Investigations on the surface properties of pure and alkali or alkaline earth metal doped ceria 

      Pashalidis, Ioannis; Theocharis, Charis R. (2000)
      The effect of parameters, such as initial cerium concentration and alkali or alkaline earth concentration in the reactant solution on the properties of precipitated ceria, have been investigated by nitrogen adsorption ...

    • Article  

      Multistage nanoparticle delivery system for deep penetration into tumor tissue 

      Wong, C.; Stylianopoulos, T.; Cui, J.; Martin, J.; Chauhan, V. P.; Jiang, W.; Popovic, Z.; Jain, R. K.; Bawendi, M. G.; Fukumura, D. (2011)
      Current Food and Drug Administration-approved cancer nanotherapeutics, which passively accumulate around leaky regions of the tumor vasculature because of an enhanced permeation and retention (EPR) effect, have provided ...

    • Article  

      Preparation and surface characterisation of novel ceria-copper and ceria-manganese mixed oxides 

      Christophidou, Maria; Theocharis, Charis R. (2002)
      The paper presents surface texture and catalysis results for a series of copper and manganese-containing ceria samples. These samples, especially the 20% manganese containing one, had significantly higher surface area than ...

    • 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  

      Supramolecular structures in nanocomposite multilayered films 

      Stefanescu, E. A.; Dundigalla, A.; Ferreiro, V.; Loizou, Elena; Porcar, L.; Negulescu, I.; Garno, J.; Schmidt, G. (2006)
      We investigate the multilayered structures of poly(ethylene)oxide/ montmorillonite nanocomposite films made from solution. The shear orientation of a polymer-clay network in solution combined with simultaneous solvent ...

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