Research page of Robert Piętka











Curriculum vitae


List of Publications

  1. "Troubleshooting in densitometry. The case of 4-phenylbutyric acid developed on chromatographic paper"
    M. Sajewicz, A. Pieniak, R. Piętka, K. Kaczmarski, T. Kowalska
    Proceedings of the International Symposium on Planar Separations "Planar Chromatography 2003", Budapest (Hungary), 21-23.06.2003; pp. 407-414
  2. "A densitometric comparison of solute retention in the classical and sandwich-type chromatographic chambers"
    M. Sajewicz, A. Pieniak, R. Piętka, K. Kaczmarski, T. Kowalska
    Proceedings of the International Symposium on Planar Separations "Planar Chromatography 2003", Budapest (Hungary), 21-23.06.2003; pp. 399-405
  3. "Densitometric acquisition of concentration profiles in planar chromatography and its possible shortcomings. Part I. 4-Phenylbutyric acid as analyte"
    M. Sajewicz, A. Pieniak, R. Piętka, K. Kaczmarski, T. Kowalska
    Acta Chromatographica, 14, 5-15 (2004)
  4. "Chiral separation of S-(+)- and R-(-)-ibuprofen by thin-layer chromatography. An improved analytical procedure"
    M. Sajewicz, R. Piętka, T. Kowalska
    Proceedings of the International Symposium on Planar Separations Symposium "Planar Chromatography 2004", Visegrad (Węgry), 23-25.05.2004; pp. 575-584
  5. "Comparison of lateral interactions with monocarboxylic and (,(-dicarboxylic acids"
    K. Kaczmarski, M. Sajewicz, A. Pieniak, R. Piętka, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 27, 1967-1980 (2004)
  6. "Densitometric comparison of the performance of Stahl-type and sandwich-type planar chromatographic chambers"
    M. Sajewicz, A. Pieniak, R. Piętka, K. Kaczmarski, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 27, 2019-2030 (2004)
  7. "Chiral separation of S-(+)- and R-(-)-ibuprofen by thin-layer chromatography. An improved analytical procedure"
    M. Sajewicz, R. Piętka, T. Kowalska
    J. Planar Chromatogr. - Modern TLC, 17, 173-176 (2004)
  8. "Chiral separations of ibuprofen and propranolol by TLC. A study of the mechanism and thermodynamics of retention"
    M. Sajewicz, R. Piętka, T. Kowalska
    Proceedings of the Workshop "Process Integration and Modeling Chromatography Processes", Rzeszów-Boguchwała, 27-29.09.2004; pp. 203-214 (ISBN 83-7199-308-0)
  9. "Application of thin-layer chromatography (TLC) to investigating oscillatory instability of the selected profen enantiomers"
    M. Sajewicz, R. Piętka, A. Pieniak, T. Kowalska
    Acta Chromatographica, 15, 131-149 (2005)
  10. "Oscillatory Instability of the Selected Profen Enantiomers. Part I. Alcohol-Aqueous Medium as a Solvent"
    M. Sajewicz, R. Piętka, A. Pieniak, T. Kowalska
    Proceedings of the International Symposium on Planar Separations Symposium 'Planar Chromatography 2005', Siófok (Węgry), 23-25.05.2005; pp. 161-177
  11. "Oscillatory Instability of the Selected Profen Enantiomers. Part II. Application of Dichloromethane as a Solvent"
    M. Sajewicz, R. Piętka, A. Pieniak, T. Kowalska
    Proceedings of the International Symposium on Planar Separations Symposium 'Planar Chromatography 2005', Siófok (Węgry), 23-25.05.2005; pp. 561-577
  12. "Chiral separations of ibuprofen and propranolol by TLC. A study of the mechanism and thermodynamics of retention"
    M. Sajewicz, R. Piętka, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 28, 2499-2513 (2005)
  13. "Application of thin-layer chromatography (TLC) to investigate oscillatory instability of the selected profen enantiomers in dichloromethane"
    M. Sajewicz, R. Piętka, A. Pieniak, T. Kowalska
    Journal of Chromatographic Science, 43, 542-548 (2005)
  14. "On the gelation of profens as a property causing their oscillatory transenantiomerization"
    M. Sajewicz, R. Piętka, P. Ku¶, T. Kowalska
    Acta Chromatographica, 16, 181-191 (2006)
  15. "Application of thin-layer chromatography to the investigation of oscillatory instability of selected profen enantiomers in physiological salt"
    M. Sajewicz, R. Piętka, A. Pieniak, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 29, 2059-2069 (2006)
  16. "On the mechanism of oscillatory changes of the retardation factor (RF) and the specific rotation [alpha]D with selected solutions of S-(+)-naproxen"
    M. Sajewicz, R. Piętka, G. Drabik, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 29, 2071-2082 (2006)
  17. "On the stereochemically peculiar two-dimensional separation of 2-arylpropionic acids by chiral TLC"
    M. Sajewicz, R. Piętka, G. Drabik, E. Namysło, T. Kowalska
    J. Planar Chromatogr. Modern TLC, 19, 273-277 (2006)
  18. "TLC in a search for structural limitations of spontaneous oscillatory in-vitro chiral conversion. Alpha-Hydroxybutyric and mandelic acids"
    M. Sajewicz, D. Kronenbach, M. Gontarska, M. Wróbel, R. Pietka, T. Kowalska
    Journal of Planar Chromatography - Modern TLC, 22, 241-248 (2009)