Plasma for Bio-Decontamination, Medicine and Food Security

0377053 - ÚFP 2013 RIV NL eng M - Část monografie knihy
Lukeš, Petr - Šunka, Pavel - Hoffer, Petr - Stelmashuk, Vitaliy - Beneš, J. - Poučková, P. - Zadinová, M. - Zeman, J.
Generation of Focused Shock Waves in Water for Biomedical Applications.
Plasma for Bio-Decontamination, Medicine and Food Security. Dordrecht: Springer, 2012 - (Machala, Z.; Hensel, K.; Akishev, Y.), s. 403-416. ISBN 978-94-007-2851-6
Grant CEP: GA ČR GA202/09/1151
Výzkumný záměr: CEZ:AV0Z20430508
Klíčová slova: Tandem shock waves * Extracorporeal lithotripsy * Melanoma cells * Sarcoma tumor
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech

The physical characteristics of focused two-successive (tandem) shock waves (FTSW) in water and their biological effects are presented. FTSW were generated by underwater multichannel electrical discharges in a highly conductive saline solution using two porous ceramic-coated cylindrical electrodes of different diameter and surface area. The primary cylindrical pressure wave generated at each composite electrode was focused by a metallic parabolic refl ector to a common focal point to form two strong shock waves with a variable time delay between the waves. The pressure fi eld and interaction between the fi rst and the second shock waves at the focus were investigated using schlieren photography and polyvinylidene fl uoride (PVDF) shock gauge sensors. The largest interaction was obtained for a time delay of 8–15 m s between the waves, producing an amplitude of the negative pressure phase of the second shock wave down to −80 MPa and a large number of cavitations at the focus
Trvalý link: http://hdl.handle.net/11104/0209311