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Carbon materials, bamboo (Bambusa vulagris) and yucca (Yucca flaccida) pyrolysed at 550°C, 750°C and 950°C, were tested as oximetric probes by electron paramagnetic resonance spectroscopy at X-band (9.3 GHz). The following parameters of the spectra: amplitude, linewidth and g-factor, were determined. Influence of oxygen molecules 02 on EPR spectra of the individual carbon materials was compared. Strong EPR spectra were recorded for samples carbonized at 550°C and weak signals were obtained for plants carbonized at higher temperatures: 750°C and 950°C. It was stated that amplitudes of EPR lines of all the carbonized plants decrease in the air environment compared to amplitudes of spectra measured in vacuum. This effect increases with degree of vacuum. Changes in the EPR spectra of samples studied in the air environment may be applied in medicine to determination of oxygen content in different cells. Because of strong resonance signals as oximetric probes we proposed bamboo and yucca carbonized at 550°C, and we rejected plants carbonized at 750°C and 950°C with Iow EPR signals.
Czasopismo
Rocznik
Tom
Strony
3--5
Opis fizyczny
Bibliogr. 20 poz., rys.
Twórcy
autor
- Centre of Polymer and Carbon Materials, Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
autor
- Centre of Polymer and Carbon Materials, Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
autor
- Centre of Polymer and Carbon Materials, Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
autor
- Centre of Polymer and Carbon Materials, Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
autor
- Centre of Polymer and Carbon Materials, Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
autor
- Centre of Polymer and Carbon Materials, Polish Academy of Science, Marii Curie-Skłodowskiej 34, 41-819 Zabrze, Poland
Bibliografia
- [1] Jezierski A., Czechowski F., Drozd J., Jerzykiewicz M., Witek B.: Free radicals in natural transformations of organie matter: humification, coalification and carbonization processes, the maillard reactions, Molecular Physics Reports 18/19(1997) 115-119.
- [2] Czechowski F., Jezierski A.: EPR studies of petrographic constituents of bituminous coals, chars and brown coal group components, and humic acids at 600°C char upon oxygen and solvent action, Energy&Fueis 11(1997) 951-964.
- [3] Smirnova T.I., Smirnov R.B., Clarkson R.B., Belford R.L.: Magnetic susceptibility and spin exchange in fusinite and carbohydrate chars, Journal of Physical Chemistry 98 (1994), 24-68.
- [4] Pilawa B., Więckowski A.B., Lewandowski M.: E.p.r. studies of thermal decomposition of vitrinite, Fuel 74(1995) 1654-1657.
- [5] Pilawa B., Więckowski A. B., Lewandowski M.: E.p.r. studies of thermal decomposition of exinite and inertinite, Fuel 75 (1996) 1181-1185.
- [6] Pilawa B., Więckowski A.B., Lewandowski M., Nassalski G.: Electron paramagnetic resonance studies of coal macerals. Influence of micorwave frequency and thermal decomposition, Erdol Erdgas Kohle 114(1998) 37-40.
- [7] Pilawa B., Więckowski A.B., Lewandowski M:. Application of EPR spectroscopy to the characterization of magnetic interactions in thermally decomposed coal, Magnetic Resonance in Chemistry 37(1999)871-877.
- [8] Pilawa B., WięckowskiA.B., Lewandowski M.: EPR studies of thermal decomposition of coal samples, Nukleonika 42 (1997) 457-464.
- [9] KrzesińskaM., Pilawa B., Pusz S., Ng J.: Physical characteristic of carbon materials derived from pyrolysed vascular plants, Biomass and Bioenergy 30/2 (2006) 166-176.
- [10] Pilawa B., Pietrzak R., Wachowska H., Babeł K.: EPR studies of carbonized cellulose - oxygen interactions, Acta Physica Polonica A 108 (2005) 151-154.
- [11] Pilawa B., WięckowskiA.B.: Conmparative e.p.r. analysis of interactions between macerals and atmospheric oxygen, Fuel 76(1997)1173-1177.
- [12] Grucker D.: Oxymetry by magnetic resonance: applications to animal biology and medicine, Progress in Nuclear Magnetic Resonance 36 (2000) 241-270.
- [13] Pandian R.P., KutalaV.K., Parinandi N.L, Zweier J.Z., Kuppusamy R: Measurements of oxygen consumption in mouse aortic endothelial cells using a microparticulate oximetry probe, Archives of Biochemistry and Biophysics 420 (2003) 169-175.
- [14] Lui K.J., Miyake M„ James P.E., Swartz H. M.: Separation and enrichment of the active component of carbon based paramagnetic materials for use in EPR oximetry, Journal of Magnetic Resonance 1 (1998)291-298.
- [15] Gribnerg O.Y., SmirnovA.I., Swartz H.M.: High spatial resolulon multi-site EPR oximetry, the use of a convolution-based fitting method, Journal of Magnetic Resonance 152(2001) 247-258.
- [16] Sentjurc M., Cemazar M., Sersa G.: EPR oximetry of tumor in vivo in cancer therapy, Spectrochimica Acta Part A60 (2004) 179-185.
- [17] Jordan B.F., Baudelet Ch., Gallez B.: Carbon-centered radicals as oxygen sensors for in vivo eleetron paramagnetic resonance: screening for an optimal probe among commercially available charcoals, Magnetic Resonance Materials in Physics, Biology and Medicine 7 (1998) 121-129.
- [18] Pilawa B., Latocha M., Kościelniak M., Pietrzak R., Wachowska H.: Oxygen effects in tumor cells during photodynamic therapy, Polish Journal of Environmental Studies 15(4A) (2006) 160-162.
- [19] Kubler A.C: Photodynamic therapy, Medical Laser Application 20 (2005) 37-45.
- [20] Alexiades-Armenakas M.: Laser-mediated photodynamic therapy, Clinics in Dermatology 24 (2006) 16-25.
Typ dokumentu
Bibliografia
Identyfikator YADDA
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