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Browsing by Subject "Composition"

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    • Article  

      Active process control of reactive sputter deposition 

      Voevodin, A. A.; Stevenson, P.; Rebholz, Claus; Schneider, J. M.; Matthews, A. (1995)
      Control of the density, composition, ionisation rate and arrival energy of species is one of the main objectives of research in the development of reactive magnetron sputtering. The deposition of the latest generation of ...

    • 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  

      Amphiphilic diblock and ABC triblock methacrylate copolymers: Synthesis and aqueous solution characterization 

      Triftaridou, Aggeliki I.; Vamvakaki, Maria; Patrickios, Costas S. (2002)
      Three isomeric, linear, equimolar, amphiphilic ABC triblock copolymers comprising methyl methacrylate (MMA, nonionic hydrophobic), 2-(dimethylamino)ethyl methacrylate, (DMAEMA, ionizable hydrophilic) and hexa(ethylene ...

    • Article  

      Deposition and characterization of nitrogen containing stainless steel coatings prepared by reactive magnetron sputtering 

      Schneider, J. M.; Rebholz, Claus; Voevodin, A. A.; Leyland, A.; Matthews, A. (1996)
      Nitrogen containing austenitic stainless steel coatings were deposited with nitrogen concentrations up to 14.1 at% using electron enhanced closed field unbalanced DC magnetron sputtering. The reactive gas flow was controlled ...

    • Article  

      Dynamic responses in nanocomposite hydrogels 

      Loizou, Elena; Butler, P.; Porcar, L.; Schmidt, G. (2006)
      The shear response of a series of polymer-clay gels has been investigated by means of rheology and small-angle neutron scattering (SANS). The gels have the same composition by mass but different polymer molecular weights ...

    • Article  

      Lattice thermal conductivity of K 2(Bi 1-zSb z) 8Se 13 solid solutions 

      Kyratsi, Theodora; Hatzikraniotis, E.; Paraskevopoulous, M.; Dyck, J. S.; Shin, H. K.; Uher, C.; Kanatzidis, M. G. (2004)
      The influence of the Bi/Sb partial substitution to the lattice thermal conductivity of the K 2(Bi 1-zSb z) 8Se 13 solid solution series was studied. The variation of the lattice thermal conductivity with comparison was ...

    • Article  

      Novel Fe-Mn-Zn-Ti-O mixed-metal oxides for the low-temperature removal of H2S from gas streams in the presence of H2, CO 2, and H2O 

      Polychronopoulou, Kyriaki; Cabello Galisteo, F.; López Granados, M.; Fierro, José Luis García; Bakas, Thomas V.; Efstathiou, Angelos M. (2005)
      The efficiency of Fe-Mn-Zn-Ti-O mixed-metal oxides of varying composition prepared by sol-gel methods toward removal of H2S from a gas mixture containing 0.06 vol% H2S, 25 vol% H2, 7.5 vol% CO 2, and 1-3 vol% H2O was studied ...

    • Article  

      Novel Zn-Ti-based mixed metal oxides for low-temperature adsorption of H2S from industrial gas streams 

      Polychronopoulou, Kyriaki; Fierro, José Luis García; Efstathiou, Angelos M. (2005)
      The efficiency of various Zn-Ti-based mixed metal oxides prepared by the sol-gel method towards H2S adsorption from a gas mixture containing 0.06 vol.% H2S, 25 vol.% H2, 7.5 vol.% CO2 and 1 vol.% H2O was studied in the ...

    • Article  

      Rainwater characteristics over an old sulphide mine refuse in Sha, Cyprus 

      Charalambides, Antonios; Petrides, Georgios; Pashalidis, Ioannis (2003)
      Rainwater characteristics over an old mining area have been investigated on the basis of long-term sample collection and determination of physical parameters and chemical composition. The experimental data, which were ...

    • Article  

      The remarkable effect of oxygen on the N2 selectivity of water catalytic denitrification by hydrogen 

      Constantinou, C. L.; Costa, Costas N.; Efstathiou, Angelos M. (2007)
      The selective catalytic reduction of nitrates (NO3-) in pure water toward N2 formation by the use of gaseous H2 and in the presence of O2 (air) at 1 atm total pressure and 25°C has been investigated over Pd-Cu supported ...

    • Article  

      The role of oxygen and hydroxyl support species on the mechanism of H 2 production in the steam reforming of phenol over metal oxide-supported-Rh and -Fe catalysts 

      Polychronopoulou, Kyriaki; Costa, Costas N.; Efstathiou, Angelos M. (2006)
      The aim of this work was to probe for the first time the back-spillover of labile O and OH species during steam reforming of phenol towards H2 production over Rh and Fe supported on MgO, Mg-Ce-O and Mg-Ce-Zr-O metal oxides. ...

    • Article  

      Synthesis and characterization of amphiphilic cationic symmetrical ABCBA pentablock terpolymer networks: Effect of hydrophobic content 

      Triftaridou, Aggeliki I.; Loizou, Elena; Patrickios, Costas S. (2008)
      Group transfer polymerization was employed for the preparation of six amphiphilic terpolymer networks comprising the hydrophilic, pH-responsive 2-(dime-thylamino)ethyl methacrylate (DMAEMA), the neutral hydrophilic methoxy ...

    • Article  

      Synthesis and characterization of amphiphilic diblock copolymers of methyl tri(ethylene glycol) vinyl ether and isobutyl vinyl ether 

      Patrickios, Costas S.; Forder, C.; Armes, S. P.; Billingham, N. C. (1996)
      Water-soluble diblock copolymers of methyl tri(ethylene glycol) vinyl ether (hydrophilic block) and isobutyl vinyl ether (hydrophobic block) of different molecular weights and composition were synthesized by living cationic ...

    • Article  

      Synthesis, characterization and evaluation of amphiphilic diblock copolymer emulsifiers based on methoxy hexa(ethylene glycol) methacrylate and benzyl methacrylate 

      Hadjiyannakou, Stella C.; Vamvakaki, Maria; Patrickios, Costas S. (2004)
      Linear, amphiphilic diblock copolymers based on the nonionic, hydrophilic monomer methoxy hexa(ethylene glycol) methacrylate (HEGMA) and the hydrophobic monomer benzyl methacrylate (BzMA) of different molecular weights and ...

    • Article  

      Synthesis, characterization and evaluation of amphiphilic star copolymeric emulsifiers based on methoxy hexa(ethylene glycol) methacrylate and benzyl methacrylate 

      Hadjiyannakou, Stella C.; Triftaridou, Aggeliki I.; Patrickios, Costas S. (2005)
      Amphiphilic star copolymers were synthesized by sequential monomer and cross-linker additions using group transfer polymerization (GTP). Benzyl methacrylate (BzMA) and methoxy hexa(ethylene glycol) methacrylate (HEGMA) ...

    • Article  

      Synthesis, characterization, and modeling of cationic amphiphilic model hydrogels: Effects of polymer composition and architecture 

      Triftaridou, Aggeliki I.; Hadjiyannakou, Stella C.; Vamvakaki, Maria; Patrickios, Costas S. (2002)
      Group transfer polymerization (GTP) was used for the preparation of eight amphiphilic networks based on 2-(dimethylamino)ethyl methacrylate (DMAEMA) and methyl methacrylate (MMA). Seven of the networks had linear segments ...

    • Conference Object  

      Transport properties of the doped thermoelectric material K2Bi8-xSbxSe13 

      Brazis, P. W.; Ireland, J. R.; Lane, M. A.; Kyratsi, Theodora; Chung, D. Y.; Kanatzidis, M. G.; Kannewurf, C. R. (Affiliation: Dept. of Electrical and Comp. Eng., Northwestern University, Evanston, IL 60208-3118, United StatesCorrespondence Address: Brazis, P.W.Dept. of Electrical and Comp. Eng., Northwestern University, Evanston, IL 60208-3118, United States, 2001)
      The synthesis, physicochemical, spectroscopic, and structural characterization of the compound β-K2Bi8Se13 has been previously reported. The results indicated that this material should be investigated further for possible ...

    • Article  

      Uranium chemistry in stack solutions and leachates of phosphogypsum disposed at a coastal area in Cyprus 

      Lysandrou, Michaela; Pashalidis, Ioannis (2008)
      The effect of the matrix composition (main constituents) on the concentration and chemical behavior of uranium in phosphogypsum stack solutions and leachates has been investigated. Solid and aqueous samples were taken from ...

    • Article  

      X-Ray diffraction investigations of magnetron sputtered TiCN coatings 

      Schneider, J. M.; Voevodin, A.; Rebholz, Claus; Matthews, A.; Hogg, J. H. C.; Lewis, D. B.; Ives, M. (1995)
      X-ray diffraction measurements were performed on titanium carbonitride coatings produced in an electron enhanced, unbalanced magnetron system. The films were deposited onto AISI 316 stainless steel substrates with an argon ...

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