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  • Title: [Dependence of synergism of the combined effect of ultrasound and hyperthermia upon intensity of ultrasound].
    Author: Komarova LN, Zhurakovskaia GP, Petin VG.
    Journal: Biofizika; 2000; 45(1):125-9. PubMed ID: 10732221.
    Abstract:
    The inactivation of wild-type yeast Saccharomyces cerevisiae was studied after simultaneous treatment with ultrasound and hyperthermia. A temperature range was established within which ultrasound and hyperthermia exert a synergistic action. The effect was shown to depend on ultrasound intensity and the temperature at which the treatment takes place. The temperature range enhancing the ultrasound effect shifted forward higher temperature with increasing ultrasound intensity. For every intensity value, an optimal temperature exists at which the synergetic effect is maximum. The biophysical interpretation of the results obtained is based on the assumption that synergism is due to an additional lethal damage, which arises from the interaction of some sub-lesions induced by both agents. These sublesions are considered non-lethal if the agents are applied separately.
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