Listar GI-CS - Artigos por autor "Brandariz, Isabel"

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    • A further study of acetylacetone nitrosation 

      Iglesias, Emilia; Brandariz, Isabel (Royal Society of Chemistry, 2013-02)
      The nitrosation of acetylacetone (AcAc) has been revised in an aqueous acid medium of perchloric acid and buffers of mono-, di-, or tri-chloroacetic acid. The results show that in the presence of buffers, under conditions ...

    • Effect of ionic strength on the formal potential of the glass electrode in various saline media 

      Brandariz, Isabel; Vilariño, Teresa; Alonso Suárez, Pablo A.; Herrero, Roberto; Fiol López, Sarah; Sastre de Vicente, Manuel (Elsevier, 1998-08)
      We examined the variation with ionic strength (I, adjusted with KCl, KNO3, KBr, NaCl or NaClO4) of the formal potential (Econst) for glass electrodes exhibiting a Nernstian response (i.e. Ecell=Econst−s log [H+]). For this ...

    • Equilibrium constants of triethanolamine in major seawater salts 

      Brandariz, Isabel; Castro, P.; Montes, María; Penedo Blanco, Francisco José; Sastre de Vicente, Manuel (Elsevier, 2006-12)
      Acid–base equilibrium constants of triethanolamine (TEA) have been determined by potentiometric titrations with a glass electrode, at 25 °C. Ionic strength was kept constant with only one electrolyte (using one of these ...

    • Fluorescence study of tetracaine–cyclodextrin inclusion complexes 

      Iglesias García, Iván.; Brandariz, Isabel; Iglesias, Emilia (Taylor and Francis Ltd., 2010-04)
      The steady-state fluorescence emission from the local anaesthetic tetracaine (TCA) in water-solvent mixtures and in the presence of α-, β- and γ-cyclodextrin (CD) was investigated at various pH values. Emission was observed ...

    • Iron(III) complexation by Vanchrobactin, a siderophore of the bacterial fish pathogen Vibrio anguillarum 

      Iglesias, Emilia; Brandariz, Isabel; Jiménez, Carlos; Soengas, Raquel G. (Royal Society of Chemistry, 2011-05)
      The bacterial fish pathogen Vibrio anguillarum serotype O2 strain RV22 produces the mono catecholate siderophore Vanchrobactin (Vb) under conditions of iron deficiency. Vb contains two potential bidentate coordination ...

    • Micellar effects on aromatic esters hydrolysis 

      Brandariz, Isabel; Iglesias, Emilia (Elsevier, 2014-07)
      The alkaline hydrolysis of two aromatic esters, 2-naphthyl acetate (2NA) and phenyl acetate (PhA) has been tackled in this work. The reaction has been followed in water and in the presence of cationic surfactants with ...

    • Potentiometric characterisation of cyclodextrin inclusion complexes of local anaesthetics 

      Brandariz, Isabel; Iglesias, Emilia (Taylor and Francis Ltd., 2011-09)
      The complexation of several local anaesthetics by β and γ-cyclodextrins was studied by potentiometry with glass electrode. Tetracaine and dibucaine complexation constants were determined at 25°C in the presence of 0.1 M ...

    • Salting coefficient of triethanolamine in major seawater salts 

      Brandariz, Isabel (Elsevier, 2006-01)
      Activity coefficient of triethanolamine (TEA) in major seawater salts (NaCl, KCl, CaCl2 and MgCl2) has been determinated using the distribution method. It increases slowly in KCl, remains almost constant in NaCl and decreases ...

    • The salting coefficient and size of alkylamines in saline media at different temperatures: estimation from Pitzer equations and the mean spherical approximation 

      Taboada Pan, Carlos.; Brandariz, Isabel; Barriada, José Luis; Vilariño, Teresa; Sastre de Vicente, Manuel (Elsevier, 2001-04)
      The renewed theoretical interest in the proton transfer associated to the amino group together with the scarcity of acid-base studies of amines in moderate to concentrated saline media focussed our attention on the study ...