Study of the Mechanism of Biological Activity Enhancement of Benzylpenicillin Sodium Salt after Treatment with Pulsed Magnetic Field of High Intensity

Magnetic field is able to change the biological activity of drugs, which can be used in medicine. Literature data on the increase in biological activity of prepared drugs under the influence of pulsed magnetic fields immediately before their administration have not been found. This article presents data on the increase in antibacterial activity of benzylpenicillin sodium salt after its treatment with pulsed magnetic field. The aim of the work is to investigate the reasons for the increase in biological activity of benzylpenicillin, to show the changes that occur in the molecule under the influence of a pulsed magnetic field. Exposure to magnetic field was carried out on powdered antibiotic on magnetic-pulse unit with magnetic field strength H = (0.09÷0.82) × 106 A/m. The pulse shape was a damped sinusoid with frequency response f = 40 kHz and f = 51 kHz. Experimental methods of NMR-spectroscopy and IR-Fourier-spectroscopy were used in the studies. The shift in the value of chemical shifts (δH) and spin-spin interaction constants (2JHH) of the signals of methylene protons of the benzyl substituent as a result of the magnetic field was found. The changes in the absorption bands of the N–H and C=O bonds of the amide grouping and the carbonyl group of the lactam cycle were detected by FTIR spectroscopy. The obtained spectral data allow us to conclude that the geometry of the benzylpenicillin sodium salt molecule in the amide fragment has changed under the influence of a pulsed magnetic field, which is probably the reason for the increase in antibacterial activity of the antibiotic.