ESR Studies of Paramagnetic Centers in Pharmaceutical Materials - Cefaclor and Clarithromycin as an Example

• Authors: A. Skowronska , M. Wojciechowski , P. Ramos , B. Pilawa , D. Kruk
• Languages of publication: EN

Abstracts

EN

Electron spin resonance (ESR) studies of two antibiotics, Cefaclor and Clarithromycin, have been performed in order to investigate concentration and dynamics of free radicals generated in these compounds due to thermal sterilization. For Cefaclor three combinations of temperature and heating time have been applied: 160°C, 170°C, 180°C for 120 min, 60 min, and 30 min, respectively, according to the pharmaceutical sterilization norm. Clarithromycin has been heated at 160°C for 120 min. The ESR lineshape has been investigated versus microwave power ranging from 2.2 mW to 70 mW. Electron spin-spin relaxation time has been estimated from the ESR lineshape analysis. Concentrations of radicals generated due to different sterilization procedures have been compared with the purpose to select the best sterilization scheme.

Keywords

EN

87.15.La; 87.64.kj; 87.64.kh; 75.10.Dg

Discipline

• 87.15.La: Mechanical properties
• 87.64.kh: EPR
• 87.64.kj: NMR
• 75.10.Dg: Crystal-field theory and spin Hamiltonians(see also 71.70.Ch Crystal and ligand fields)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 2
• Pages: 514-517

Dates

published

2012-02

Contributors

author

A. Skowronska

• Institute of Physics, Jagiellonian University, W.S. Reymonta 4,30-059 Kraków, Poland

author

M. Wojciechowski

• Institute of Physics, Jagiellonian University, W.S. Reymonta 4,30-059 Kraków, Poland

author

P. Ramos

• Department of Biophysics, Medical University of Silesia, Sosnowiec, Poland

author

B. Pilawa

• Department of Biophysics, Medical University of Silesia, Sosnowiec, Poland

author

D. Kruk

• University of Warmia and Mazury in Olsztyn, Faculty of Mathematics and Computer Science, Słoneczna 54, PL-10-710 Olsztyn, Poland

References

• [1] P. Ramos, B. Pilawa, S. Wilczyński, K. Czyż, J. Adamczyk, Eng. Biomat. 12, 7 (2009)
• [2] P. Ramos, B. Pilawa, Curr. Top. Biophys. 33, suppl. A, 183 (2010)
• [3] P. Ramos, B. Pilawa, M. Biernaś, J. Med. Inf. Technol. 15, 185 (2010)
• [4] P. Ramos, B. Pilawa, Curr. Top. Biophys. 33, suppl. B, 47 (2010)
• [5] P. Ramos, P. Peplonski, B. Pilawa, Eng. Biomat. 12, 162 (2009)
• [6] A. Abragam, B. Bleaney, Electron Paramagnetic Resonance of Transition Ions, Dover Publications, New York 1986
• [7] J.E. Wertz, J.R. Bolton, Electron Spin Resonance. Theory and Practical Application, Chapman and Hall, London 1986
• [8] A. Zejca, Chemia leków (Chemistry of Medicines), PZWL, Warszawa 2004 (in Polish)

Identifiers

DOI

10.12693/APhysPolA.121.514