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Analysis of oxidized regenerated cellulose (ORC)-dependent pH in phosphate buffered saline (PBS), supplemented culture medium (DMEM), and cerebrospinal fluid (CSF) determined with electron paramagnetic resonance (EPR) spectroscopy. Results of the pH measurements with the EPR probe HM (1 mmol/L) in 100 µL or 200 µL solution and 50 mm2 (3.4 mg) Tabotamp®. The diagram shows the means and standard deviations of three independent experiments.
