Photis Dais

Emeritus Professor of Physical Chemistry
Department of Chemistry, University of Crete




Work experience

Research interests

NMR spectroscopy
  • Rotational dynamics of small and medium sized molecules in solution.
  • Relaxation studies on the conformational dynamics of naturally occurring oligo-and polysaccharide molecules in dilute solutions.
  • Liquid and solid state relaxation studies on the microstructure, morphology, and chain local motions of industrial synthetic polymers.
  • Multi-nuclear and multi-dimensional NMR techniques for the structure elucidation and the conformational dynamics of natural products.
  • Food analysis, quality control and authentication (e.g. olive oil, wine, honey).
  • Development of new analytical NMR methods (e.g. 31P NMR spectroscopy).
  • NMR based metabonomics and chemometrics.

History and philosophy of science
  • History of the Physical Sciences, 18th-20th centuries
  • Philosophy of Physical Science

Selected publications

NMR spectroscopy
  1. E. Tylianakis, A. Spyros, Photis Dais, F. Taravel, and A. Perico. NMR study of the rotational dynamics of linear homopolysaccharides in dilute solutions as a function of linkage position and stereochemistry. Carbohydr. Res., 1999, 315, 16-34.

  2. A. Karali, Photis Dais, E. Mikros, and F. Heatley. Conformational Analysis of Poly (N-vinylcarbazole) by NMR Spectroscopy and Molecular Modeling. Macromolecules 2001, 34, 5547-5554.

  3. S. Christoforidou, Photis Dais, Li-Hong Tseng, and M. Spraul. Separation and identification of phenolic compounds in olive Oil by coupling high performance liquid chromatography with post-column solid phase extraction to nuclear magnetic resonance spectroscopy (LC-SPE-NMR). J. Agric. Food Chem. 2005, 53, 4667-4679.

  4. I. Stefanaki, E. Mikros, G. Fragaki, and Photis Dais. Conformational analysis of ochratoxin A by NMR spectroscopy and molecular modelling. J. Phys. Chem. B 2005, 109, 12926-16936.

  5. P. Petrakis, A. Agiomyrgianaki, S. Christophoridou, A. Spyros, P. Dais. Geographical characterization of Greek virgin olive oils (Cv. Koroneiki) using 1H and 31P NMR fingerprinting with canonical discriminant analysis and classification binary trees. J. Agric. Food Chem 2008, 56, 3200-3207.

  6. E. Hatzakis, A. Koidis, D. Boskou, and Photis Dais. Determination of Phospholipids in Olive Oil by 31P NMR spectroscopy. J. Agric. Food Chem. 2008, 56, 6232-6240.

  7. S. Christophoridou and Photis Dais. Detection and Quantification of Phenolic Compounds in Olive Oil by High Resolution 1H Nuclear Magnetic Resonance Spectroscopy. Anal. Chim. Acta 2009, 633, 283-292.

  8. A. Agiomyrianaki, P.V. Petrakis and P. Dais. Detection of refined hazelnut oil in refined olive oil by employing NMR spectroscopy and multivariate statistical analysis. Talanta 2010, 80, 2165-2171.

  9. E. Hatzakis, G. Dagounakis and Photis Dais. A Facile NMR Method for the Quantification of Total Free and Esterified Sterols in Virgin Olive Oil. Food Chem. 2010, 122, 346-352.

  10. A. Agiomyrgianaki, P. Petrakis and Photis Dais. Influence of harvest year, cultivar and geographical origin on Greek extra virgin olive oils composition: a study by NMR spectroscopy and biometric analysis. Food Chem. 2012, 135, 2561-2568.

  11. A. Agiomyrgianaki and Photis Dais. Simultaneous determination of phenolic compounds and triterpenic acids in oregano growing wild in Greece by 31P NMR spectroscopy. Magn. Reson. Chem. 2012, 50, 739-748.

  12. A. Agiomyrgianaki, J. Sedman, F.R. van de Voort, and Photis Dais. Cis and trans components of lipids. Analysis by 1H NMR and silver shift reagents. Eur. J. of Lipid Sci. Technol. 2012, 114, 504-509.

  13. E. Manolopoulou, A. Spinella, E. Caponetti, P. Dais, and A. Spyros. High resolution-magic angle spinning NMR study of olive leaves. In: Magnetic Resonance in Food Science. Food for Thought. J. van Duynhoven, P. S. Belton, G. A. Webb (Eds), Royal Society of Chemistry, 2013, pp. 164-170.

  14. A. Orfanakis, E. Hatzakis, .K. Kanaki, S.A. Pergantis, A.K. Rizos, and Photis Dais. Characterization of Polyglycerol Polyricinolate Formulations by Using a Combination of NMR Spectroscopy, Electrospray Mass Spectrometry, and Dynamic Light Scattering. J. Am. Oil Chem. Soc. 2013, 90, 39-51.

  15. Photis Dais, M. Misiak, and E. Hatzakis. Analysis of marine dietary supplement using NMR Spectroscopy. Analytical Methods 2015, 7, 5226-5238.

  16. A. Kazalaki, M. Misiak, A. Spyros and Photis Dais. Identification and quantitative determination of carbohydrate molecules in Greek honey by employing 13C NMR spectroscopy. Analytical Methods 2015, 7, 5962-5972.

  17. Photis Dais and E. Hatzakis. Quality assessment and authentication of virgin olive oil by NMR spectroscopy: a critical review. Anal. Chim. Acta. 2013, 765, 1-27.

History and philosophy of science
  1. Photis Dais. The Stern-Gerlach experiment: the precursor of the electron spin? Nefsis, 2018, 25, 70-101.

  2. Photis Dais. The double transfer of thermodynamics: From physics to chemistry and from Europe to America. Studies in History and Philosophy of Science, in press.

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