Browsing by Author "cd05dcea-3208-4811-a2a4-4b43f4a2ba1b"

Now showing items 1-10 of 10

    • Adsorption of As (V) by poly (N-octyl-4-vinylpyridinium) bromide: Determination of As (V) by direct measurement ... 
      González Navarrete, Javier; Toral Ponce, María; Leiva, Angel; Yazdani-Pedram Zobeiri, Mehrdad; Ríos, Hernán; Briones-Olarán, Ximena; Urzúa Acevedo, Marcela (Elsevier B.V., 2016)
      Adsorption of As (V) by poly (N-octyl-4-vinylpyridinium) bromide (P4VPyC8), used as solid phase, was studied. Determination of As (V) was carried out by direct measurement of the fluorescence intensity on the solid phase. ...
    • Adsorption of poly(4-vinylpyridine) N-alkyl quaternized at the chloroform/water interface 
      Urzúa Acevedo, Marcela; Ríos, Hernán E. (2003)
      The Du Noüy method has been employed to study the interfacial properties of poly(4-vinylpyridine) N-n-alkyl quaternized with hexyl, octyl and decyl bromide, at the chloroform/water interface. The interfacial tension is ...
    • Adsorption of poly(mono-n-alkylmaleate-alt-N-vinyl-2-pyrrolidone) sodium salts at air/water interface 
      Ríos, Hernán E.; Fonseca, Carla K.; Brito, Cristián; Urzúa Acevedo, Marcela; Cabrera, Walton J. (2006)
      The surface properties of poly(mono-n-alkylmaleate-alt-N-vinyl-2- pyrrolidone) sodium salts derivatives with n=8, 10, 12, 16, and 18 carbon atoms in the side chain were analyzed. The surface tension behavior suggests that ...
    • Chromium retention properties of N-alkyl quaternized poly(4-vinylpyridine) 
      Toral Ponce, María; González Navarrete, Javier; Leiva, Angel; Ríos, Hernán E.; Urzúa Acevedo, Marcela (2009)
      The ability of solid N-alkyl quaternized poly(4-vinylpyridine) with hexyl, octyl and decyl bromide for the retention of chromate and dichromate forms of Cr(VI) in aqueous solutions is studied. The retention of Cr(VI) was ...
    • Effect of phenols on the potentiometric response of a nitrate-ion-selective electrode 
      Cabrera, Walton J.; Urzúa Acevedo, Marcela; Ríos Pella Lillo, Hernán Eugenio (Academic Press Inc., 2003)
      The effect of phenols containing different electron-withdrawing substituents on the potentiometric responses of several liquid PVC membranes containing the complex trioctylmethylammonium-nitrate, TOMA+NO3 -, is analyzed. ...
    • Influence of decyl alcohol on the potentiometric behavior of three p-alkylbenzenesulfonate ion-selective electrodes 
      Cabrera, Walton J.; Urzúa Acevedo, Marcela; Rios Peña Lillo, Hernán (2005)
      The influence of decyl alcohol on the potentiometric response of three para-alkylbenzenesulfonate (p-RBS) electrodes is analyzed. The results are clearly dependent on the membrane surface polarity due to the presence of ...
    • Inhibiting Pathogen Surface Adherence by Multilayer Polyelectrolyte Films Functionalized with Glucofuranose ... 
      Villalobos, Valeria; Leiva, Ángel; Ríos, Hernán E.; Pavez, Jorge; Silva, Carlos P.; Ahmar, Mohammed; Queneau, Yves; Blamey, J. M.; Chávez, Francisco P.; Urzúa Acevedo, Marcela (American Chemical Society, 2018)
      © 2018 American Chemical Society. Inhibiting pathogenic bacterial adherence on surfaces is an ongoing challenge to prevent the development of biofilms. Multilayer polyelectrolyte films are feasible antibacterial materials. ...
    • Ion‐Exchange equilibria in cationic polyelectrolytes 
      Ríos, Hernán E.; Ternero, Gerardo A.; Barraza, Raúl G.; Gamboa, Irma C. (1994)
      A method which allows the evaluation of phenomenological ion exchange constants Kex is proposed and tested in a cationic polyelectrolyte system. Results for nitrate/chloride exchange are nearly constant over the entire ...
    • Polysoap Solutions: Air-Water Interfacial Properties 
      Ríos, HernÁn E.; Rojas, Juan S.; Gamboa, Irma C.; Barraza, Raúl O. (1993)
      Four sodium polysoaps from poly[malcic anbydride-co-styrene] were synthesized and the surface properties of their aqueous solutions at the air-water interface were determined. The surface tension lowering was directly ...
    • Surface properties of cationic polyelectrolytes hydrophobically modified 
      Ríos, Hernán E.; González Navarrete, Javier; Vargas, Víctor; Urzúa Acevedo, Marcela (Elsevier, 2011)
      Poly (N,N-dimethyl-N,N-diallyl ammonium) chloride, a highly hydrophilic polyelectrolyte, was hydrophobically modified and the surface properties of the resulting amphipathic polyelectrolytes were determined. The surface ...