CONTENTS

     ORIGINAL RESEARCH PAPERS

• Comparison of image-transformation methods used in matching 2D gel electrophoresis images
        K. Kaczmarek, B. Walczak, S. de Jong, and B. G. M. Vandeginste (ACROBAT)

• Effect of particle-size distribution and particle porosity changes on mass-transfer kinetics
        K. Kaczmarski and J. Ch. Bellot (ACROBAT)

• Analysis of amylbenzene adsorption equilibria on an RP-18e chromatographic column
        M. Gubernak, W. Zapała, and K. Kaczmarski (ACROBAT)

• Temperature dependence of Kováts indices in gas chromatography.
  Explanation of empirical constants by use of Transition-State Theory
        T. Kowalska, K. Héberger, and M. Görgényi (ACROBAT)

• A study of the dependence of the Kováts retention index on the
  temperature of analysis on stationary phases of different polarity
        K. Ciążyńska-Halarewicz and T. Kowalska (ACROBAT)

• Mathematical models of solute retention in gas chromatography
  as sources of thermodynamic data.
  Part II. Aldehydes as the test analytes
        K. Ciążyńska-Halarewicz and T. Kowalska (ACROBAT)

• Effect of steroid hormones on results from the determination
  of oxycholesterol by TLC
        B. Janoszka, T. Wielkoszyński, K. Tyrpień, C. Dobosz, and D. Bodzek (ACROBAT)

• Comparative evaluation of precoated silica gel plates
  for preparative layer chromatography
        A. N. Campbell and J. Sherma (ACROBAT)

• Development and validation of a high-performance thin-layer chromatographic method with densitometric detection
  for determination of bisacodyl in pharmaceutical tablets
        A. N. Campbell and J. Sherma (ACROBAT)

• Novel mobile phase for separation of Cr⁶⁺ from Cr³⁺ and associated
  heavy metal cations by high-performance thin-layer chromatography
        A. Mohammad and Y. H. Sirwal (ACROBAT)

• Reversed-phase chromatography of amines, phenols, and metal
  cations on silica layers impregnated with tributyl phosphate,
  using surfactant-mediated mobile phases
        A. Mohammad and N. Jabeen (ACROBAT)

• Investigation of nicotine transformation products by densitometric TLC and GC-MS
        K. Tyrpień, C. Dobosz, A. Chróściewicz, M. Ciołecka, T. Wielkoszyński, B. Janoszka , and D. Bodzek (ACROBAT)

• Selective TLC separation of lysine and threonine in pharmaceutical preparations
        S. A. Nabi and M. A. Khan (ACROBAT)

• Studies on titanium(IV) tungstosilicate and titanium(IV) tungstophosphate.
  II. Separation and estimation of heavy metals from aquatic environments
        Z. M. Siddiqi and D. Pathania (ACROBAT)

• Optimization and validation of a high-performance liquid
  chromatographic method for determination of α- and γ-tocopherol
  in rat plasma and erythrocytes
        M. T. Gawlik, M. B. Gawlik, A. Górka, and J. Brandys (ACROBAT)

• HPLC-UV and GC-MS characterization of the flavonol aglycons
  quercetin, kaempferol, and myricetin in tomato pastes
  and other tomato-based products
        Ö. Tokuşoglu, M. K. Ünal, and Z. Yildirim (ACROBAT)

• Multiresidue determination of diazinon and ethion in pistachio nuts
  by use of matrix solid phase dispersion with a lanthanum silicate
  co-column and gas chromatography
        S. W. Husain, V. Kiarostami, M. Morrovati, and M. R. Tagebakhsh (ACROBAT)

• GC methods for quantitative determination of benzene in gasoline
        A. Pavlova and R. Ivanova (ACROBAT)

     SHORT COMMUNICATIONS

• Gas chromatographic determination of azoxystrobin and tifloxystrobin residues in apples
        I. Giza and U. Sztwiertnia (ACROBAT)

• Monitoring river water in the lower Danube for atrazine contamination
        N. K. Vitanov, K. I. Lekova, and N. I. Dobreva (ACROBAT)

• Lipophilicity indexes of some 3-alkylthio and 3-alkylsulfinyl 4(1H)-quinolones
        M. Rudnik, E. Chrobak, and M. J. Maślankiewicz (ACROBAT)

• Electrophoretic studies of metal ions and anions on zirconium(IV) phenylethylamine-impregnated papers
        I. Ahmad, N. Rahman, and S. Z. Qureshi (ACROBAT)

     NOTE TO AUTHORS