Research page of £ukasz Wojtal











Curriculum vitae


List of Publications

  1. "Study on the oscillatory in vitro transenantiomerization and enantioseparation of the flurbiprofen antimers by means of thin layer chromatography (TLC)"
    M. Sajewicz, M. Gontarska, D. Kronenbach, £. Wojtal, G. Grygierczyk, T. Kowalska
    Acta Chromatographica, 18, 226-237 (2007)
  2. "Experimental and model investigation of the oscillatory transenantiomerization of L-a-phenylalanine"
    M. Sajewicz, M. Gontarska, £. Wojtal, D. Kronenbach, M. Leda, I.R. Epstein, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 31, 1986-2005 (2008)
  3. "On optimization of the double development mode applied to separation of the fraction of phenolic acids and flavonoids from the extracts of Salvia officinalis L"
    G. Grygierczyk, M. Sajewicz, D. Staszek, £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    Annales UMCS, Sectio DDD Pharmacia, 21, 37-43 (2008)
  4. "TLC-based start-to-end method of analysis of selected biologically active compounds contained in common sage (Salvia officinalis L.)"
    G. Grygierczyk, M. Sajewicz, D. Staszek, £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 32, 1223-1240 (2009)
  5. "Fingerprint of selected salvia species by HS-GC-MS analysis of their volatile fraction"
    J. Rzepa, £. Wojtal, D. Staszek, G. Grygierczyk, K. Labe, M. Hajnos, T. Kowalska, M. Waksmundzka-Hajnos
    Journal of Chromatographic Science, 47, 575-580 (2009)
  6. "GC-MS study of the performance of different techniques for isolating the volatile fraction from sage (Salvia L.) species, and comparison of seasonal differences in the composition of this fraction"
    M. Sajewicz, J. Rzepa, M. Hajnos, £. Wojtal, D. Staszek, T. Kowalska, M. Waksmundzka-Hajnos
    Acta Chromatogr., 21, 453-471 (2009)
  7. "Comparative analysis of the chromatographic fingerprints of twenty different sage (Salvia L.) species"
    M. Daszykowski, M. Sajewicz, J. Rzepa, M. Hajnos, D. Staszek, . Wojtal, T. Kowalska, M. Waksmundzka-Hajnos, B. Walczak
    Acta Chromatogr., 21, 513-530 (2009)
  8. "Low temperature planar chromatography-densitometry and gas chromatography of essential oils from different sage (Salvia) species"
    M. Sajewicz, . Wojtal, D. Staszek, M. Hajnos, M. Waksmundzka-Hajnos, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 33, 936-947 (2010)
  9. "Low-temperature TLC-MS of essential oils from five different sage (Salvia) species"
    M. Sajewicz, £. Wojtal, M. Hajnos, M. Waksmundzka-Hajnos, T. Kowalska
    Journal of Planar Chromatography-Modern TLC, 23, 270-276 (2010)
  10. "Validated binary high-performance thin-layer chromatographic fingerprints of polyphenolics for distinguishing different Salvia species"
    £. Ciesla, M. Hajnos, D. Staszek, £. Wojtal, T. Kowalska, M. Waksmundzka-Hajnos
    Journal of Chromatographic Science, 48, 421-427 (2010)
  11. "Binary HPLC-Diode Array Detector and HPLC-Evaporative Light Scattering Detector fingerprints of methanol extracts from the selected sage (Salvia) species"
    M. Sajewicz, D. Staszek, £. Wojtal, T. Kowalska, M. Hajnos, M. Waksmundzka-Hajnos
    Journal of AOAC Int., 94, 71-76 (2011)
  12. "Exploration of the possibility of combined HS - GC - MS and 13C NMR spectroscopic investigation of the composition of the essential oils of selected sage (Salvia) species"
    M. Sajewicz, M. Matlengiewicz, J. Rzepa, £. Wojtal, M. Hajnos, M. Waksmundzka-Hajnos, T. Kowalska
    Acta Chromatogr., 23, 181-190 (2011)
  13. "TLC-MS versus TLC-LC-MS fingerprints of herbal extracts. Part I. Essential oils"
    M. Sajewicz, £. Wojtal, M. Natię, D. Staszek, M. Waksmundzka-Hajnos, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 34, 848-863 (2011)
  14. "TLC-MS versus TLC-LC-MS fingerprints of herbal extracts. Part II. Phenolic acids and flavonoids"
    M. Sajewicz, D. Staszek, M. Natię , £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    Journal of Liquid Chromatography & Related Technologies, 34, 864-887 (2011)


List of conference papers

  1. "On the spontaneous oscillatory transenantiomerization and thin layer chromatographic enantioseparation of the S-(+)- and R-(-)-flurbiprofen antimers." (poster presentation)
    M. Sajewicz, G. Grygierczyk, M. Gontarska, £. Wojtal, D. Kronenbach, T. Kowalska
    XXXI Scientific Symposium "Chromatographic methods of investigating organic compounds", Katowice-Szczyrk (Poland), 4-6.06.2007
  2. "Investigation of a spontaneous in vitro structural inversion of S-(+)- and R-(-)-flurbiprofen by means of polarimetry and thin layer chromatography (TLC)" (poster presentation)
    M. Sajewicz, G. Grygierczyk, M. Gontarska, £. Wojtal, D. Kronenbach, T. Kowalska
    13th International Symposium on Separation Sciences, Strbske Pleso (Slovakia), 27-29.06.2007
  3. "Thin Layer Chromatographic and Polarimetric Investigation of the Spontaneous Oscillatory in vitro Transenantiomerization of L-Phenylalanine" (poster presentation)
    M. Sajewicz, M. Gontarska, £. Wojtal, I.R. Epstein, T. Kowalska
    7th Balaton Symposium on High-Performance Separation Methods, Siófok (Hungary), 5-7.09.2007
  4. "On the in vitro oscillatory chiral inversion of profen drugs and its implications" (poster presentation)
    M. Sajewicz, G. Grygierczyk, M. Gontarska, £. Wojtal, D. Kronenbach, M. Leda, I.R. Epstein, T. Kowalska
    1st International Conference on Drug Design and Discovery. 4-7.02.2008, Dubai (United Arab Emirates)
  5. "Separation and identification of the volatile organic compounds in the different species of sage by means of HS-GC/MS." (poster presentation)
    J. Rzepa, £. Wojtal, D. Staszek, K. Labe, M. Hajnos, M. Waksmundzka-Hajnos, T. Kowalska
    "Current problems of analytical chemistry" Katowice (Poland) 30.05.2008
  6. "Optimization of the separation of phenolic acids and flavonoids from the extracts of Salvia officinalis L." (poster presentation)
    G. Grygierczyk, M. Sajewicz, D. Staszek, £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    " Current problems of analytical chemistry" Katowice (Poland) 30.05.2008
  7. "Separation and identification of the volatile organic compounds in the different species of sage by means of HS-GC/MS." (poster presentation)
    J. Rzepa, £. Wojtal, D. Staszek, K. Labe, M. Hajnos, M. Waksmundzka-Hajnos, T. Kowalska
    6th International Symposium on Chromatography of Natural Products. Lublin (Poland) 15-18.06.2008
  8. "TLC/densitometry and HPLC/DAD studies of phenolic acids in Salvia officinalis L." (poster presentation)
    G. Grygierczyk, M. Sajewicz, D. Staszek, £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    6th International Symposium on Chromatography of Natural Products. Lublin (Poland), 15-18.06.2008
  9. "TLC/densitometry and HPLC/DAD studies of flavonoids in Salvia officinalis L." (poster presentation)
    G. Grygierczyk, M. Sajewicz, D. Staszek, £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    6th International Symposium on Chromatography of Natural Products. Lublin (Poland), 15-18.06.2008
  10. "A comparison of the efficiency of retrieving volatile constituents from the different sage species (Salvia species L.)." (poster presentation)
    M. Sajewicz, J. Rzepa, £. Wojtal, D. Staszek, M. Hajnos, T. Kowalska, M. Waksmundzka-Hajnos
    XXXII Scientific Symposium "Chromatographic methods of investigating organic compounds", Katowice-Szczyrk (Poland), 3-5.06.2009
  11. "The analysis of essential oils contained in the different sage (Salvia L.) species by means of TLC/densitometry." (poster presentation)
    M. Sajewicz, £. Wojtal, D. Staszek, £. Krzystanek, M. Hajnos, T. Kowalska, M. Waksmundzka-Hajnos
    XXXII Scientific Symposium "Chromatographic methods of investigating organic compounds", Katowice-Szczyrk (Poland), 3-5.06.2009
  12. "A comparison of the phenolic acid and flavonoid contents in twenty different sage species (Salvia species L.) by means of TLC/densitometry." (poster presentation)
    M. Sajewicz, D. Staszek, £. Wojtal, A. Miko³ajek, £. Ciesla, M. Waksmundzka-Hajnos, T. Kowalska
    XXXII Scientific Symposium "Chromatographic methods of investigating organic compounds", Katowice-Szczyrk (Poland), 3-5.06.2009
  13. "A comparison of the phenolic acid and flavonoid contents in twenty different sage species (Salvia species L.) by means of HPLC/DAD." (poster presentation)
    M. Sajewicz, D. Staszek, £. Wojtal, K. Mitera, M. Waksmundzka-Hajnos, T. Kowalska
    XXXII Scientific Symposium "Chromatographic methods of investigating organic compounds", Katowice-Szczyrk (Poland), 3-5.06.2009
  14. "Chemometrics in comparative analysis of chromatographic fingerprints of the extracts from different sage (Salvia L.) species." (poster presentation)
    M. Daszykowski, £. Wojtal, D. Staszek, M. Hajnos, M. Sajewicz, T. Kowalska, M. Waksmundzka-Hajnos, B. Walczak
    XXXII Scientific Symposium "Chromatographic methods of investigating organic compounds", Katowice-Szczyrk (Poland), 3-5.06.2009
  15. "Chemotaxonomic Analysis of the Essential Oil Composition with Two Different Essential-Oil Rich Sage Species (Salvia lavandulifolia L. and Salvia triloba L.) Using Different Sample Preparation Methods." (poster presentation)
    M. Sajewicz, J. Rzepa, £. Wojtal, D. Staszek, M. Hajnos, T. Kowalska, M. Waksmundzka-Hajnos
    8th Balaton Symposium on High-Performance Separation Methods, Siófok (Hungary), 2-4.09.2009
  16. "One- and Multidimensional Thin-Layer Chromatography for the Analysis of Phenolic Acids and Flavonoids from the Different Salvia Species." (poster presentation)
    M. Sajewicz, £. Ciesla, D. Staszek, £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    8th Balaton Symposium on High-Performance Separation Methods, Siófok (Hungary), 2-4.09.2009
  17. "Utilization of different procedures of retrieving volatile compounds contained in a variety of the sage species (Salvia species L.) for the analysis by means of GC-MS." (poster presentation)
    M. Sajewicz, J. Rzepa, £. Wojtal, D. Staszek, M. Hajnos, T. Kowalska, M. Waksmundzka-Hajnos
    II Ogólnopolskie Sympozjum "Nowoczesne techniki badawcze w ocenie jakosci produktów leczniczych", Lublin (Polska), 24-25.09.2009
  18. "HS-GC-MS comparison of seasonal differences in chemical composition of the volatile fraction derived from the selected sage (Salvia L.) species." (poster presentation)
    M. Sajewicz, J. Rzepa, £. Wojtal, D. Staszek, M. Hajnos, T. Kowalska, M. Waksmundzka-Hajnos
    II Ogólnopolskie Sympozjum "Nowoczesne techniki badawcze w ocenie jakosci produktów leczniczych", Lublin (Polska), 24-25.09.2009
  19. "A comparison of the separation and quantification performance of HPLC-DAD and HPLC-ELSD with the selected sage (Salvia L.) species." (poster presentation)
    M. Sajewicz, D. Staszek, £. Wojtal, M. Waksmundzka-Hajnos, T. Kowalska
    II Ogólnopolskie Sympozjum "Nowoczesne techniki badawcze w ocenie jakosci produktów leczniczych", Lublin (Polska), 24-25.09.2009
  20. "Analysis of different sage (Salvia L.) species by means of TLC/densitometry." (poster presentation)
    M. Sajewicz, D. Staszek, £. Wojtal, £. Ciesla, M. Waksmundzka-Hajnos, T. Kowalska
    II Ogólnopolskie Sympozjum "Nowoczesne techniki badawcze w ocenie jakosci produktów leczniczych", Lublin (Polska), 24-25.09.2009
  21. "Chromatographic and spectroscopic analysis of essential oils from Salvia lavandulifolia L. and Salvia triloba L."
    M. Sajewicz, M. Matlengiewicz, J. Rzepa, £. Wojtal, M. Hajnos, M. Waksmundzka-Hajnos, T. Kowalska
    XXXIII Sympozjum Naukowe nt. "Chromatograficzne metody badania zwi¹zków organicznych", Katowice-Szczyrk, 25-27.05.2010
  22. "A comparison of the essential oil fingerprints derived from selected sage (Salvia) species with use of thin-layer chromatography directly and indirectly coupled with mass spectrometry"
    M. Sajewicz, £. Wojtal, M. Natię, M. Waksmundzka-Hajnos, T. Kowalska
    XXXIII Sympozjum Naukowe nt. "Chromatograficzne metody badania zwi¹zków organicznych", Katowice-Szczyrk, 25-27.05.2010