1. Editorial

   • Donald A. Palmer
   • Joseph A. Rard

   EditorialNotes Pages: 1 - 3

2. The Determination of Protonation Constants of Some Amino Acids and Their Esters by Potentiometry in Different Media

   • Esin Canel
   • Ayşegül Gültepe
   • Esma Kilıç

   OriginalPaper Pages: 5 - 19

3. Apparent Molar Volumes of Symetric and Asymetric Tetraalkylammonium Salts in Dilute Aqueous Solutions

   • Luis H. Blanco
   • Edgar F. Vargas

   OriginalPaper Pages: 21 - 28

4. Volumetric, Electric, and Magnetic Properties of Thioxanthen-9-one in Aprotic Solvents as Revealed by High-Precision Densitometry, High-Accuracy Refractometry and Magnetic Susceptibility Measurements and by DFT Calculations

   • Ysaías J. Alvarado
   • José Caldera-Luzardo
   • Pedro Silva

   OriginalPaper Pages: 29 - 49

5. Kinetics and Mechanism of the Oxidation of Vanillin by Hexacyanoferrate(III) in Aqueous Alkaline Medium

   • Timy P. Jose
   • Sharanappa T. Nandibewoor
   • Suresh M. Tuwar

   OriginalPaper Pages: 51 - 62

6. Physical and Excess Properties for Binary Mixtures of 1-Methyl-3-Octylimidazolium Tetrafluoroborate, [Omim][BF₄], Ionic Liquid with Different Alcohols

   • Alberto Arce
   • Eva Rodil
   • Ana Soto

   OriginalPaper Pages: 63 - 78

7. Complexation and Precipitation of Arsenate and Iron Species in Sodium Perchlorate Solutions at 25^∘C

   • Juan C. Raposo
   • María A. Olazábal
   • Juan M. Madariaga

   OriginalPaper Pages: 79 - 94

8. Competition Between O₂ and H₂O₂ in the Oxidation of Fe(II) in Natural Waters

   • Melchor González-Dávila
   • J. Magdalena Santana-Casiano
   • Frank J. Millero

   OriginalPaper Pages: 95 - 111

9. Bis(crown-6)calix[4]arene/Cs⁺ Coordination Chemistry in NPME Solution

   • Jian X. Gao
   • Jian C. Wang
   • H. Yang

   OriginalPaper Pages: 113 - 119

10. Excess Molar Volume and Viscosity of Isobutyric Acid + Water Binary Mixtures Near and Far Away from the Critical Temperature

    • N. Ouerfelli
    • M. Bouanz

    OriginalPaper Pages: 121 - 137