Effect of pH on Paramagnetic Centers in Cladosporium cladosporioides Melanin

• Authors: B. Pilawa , E. Buszman , A. Gondzik , S. Wilczyński , M. Zdybel , T. Witoszyńska , T. Wilczok
• Languages of publication: EN

Abstracts

EN

Paramagnetic centers in melanin existing in pigmented soil fungi Cladosporium cladosporioides cultured at acidic (4, 5, 6), neutral (7), and alkaline (8) pH were studied by EPR method. o-semiquinone free radicals (g: 2.0032-2.0040) concentration in melanin biopolymer increased for pH from 4 to 6, decreased at pH 7, and reached the maximum value at pH 8. It may be expected that melanin free radicals reactions with small molecules (metal ions, drugs) are the most effective at pH between 6 and 8. Slow spin-lattice relaxation processes exist in the all studied melanin samples.

Keywords

EN

61.66.Hq; 76.30.Rn

Discipline

• 76.30.Rn: Free radicals
• 61.66.Hq: Organic compounds

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 1
• Pages: 147-150

Dates

published

2005-07

received

2005-04-24

Contributors

author

B. Pilawa

• Department of Medical Physics, School of Pharmacy, Medical University of Silesia, Narcyzów 1, 41-200 Sosnowiec, Poland

author

E. Buszman

• Department of Pharmaceutical Chemistry, School of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland

author

A. Gondzik

• Department of Medical Physics, School of Pharmacy, Medical University of Silesia, Narcyzów 1, 41-200 Sosnowiec, Poland

author

S. Wilczyński

• Department of Medical Physics, School of Pharmacy, Medical University of Silesia, Narcyzów 1, 41-200 Sosnowiec, Poland

author

M. Zdybel

• Department of Medical Physics, School of Pharmacy, Medical University of Silesia, Narcyzów 1, 41-200 Sosnowiec, Poland

author

T. Witoszyńska

• Department of Pharmaceutical Chemistry, School of Pharmacy, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland

author

T. Wilczok

• Department of Molecular Biology and Medical Genetics, School of Pharmacy, Medical University of Silesia, Narcyzów 1, 41-200 Sosnowiec, Poland

References

• 1. B. Pilawa, E. Buszman, M. Latocha, T. Wilczok, Pol. J. Med. Phys. Eng., 2, 59, 1995
• 2. E. Buszman, B. Pilawa, M. Latocha, T. Wilczok, D. Tyrawska-Spychalowa, C. Bajan, A. Bijak, B. Bilińska, Current Topics in Biophysics, 22, 21, 1998
• 3. E. Buszman, B. Pilawa, T. Witoszyńska, M. Latocha, T. Wilczok, Appl. Magn. Res., 24, 401, 2003
• 4. M. Matuszczyk, E. Buszman, B. Pilawa, T. Witoszyńska, T. Wilczok, Chem. Phys. Lett., 394, 366, 2004
• 5. B. Pilawa, E. Buszman, D. Wrześniok, M. Latocha, T. Wilczok, Appl. Magn. Res., 23, 181, 2002

Identifiers

DOI

10.12693/APhysPolA.108.147