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Microwave effect on diffusion: a possible mechanism for non-thermal effect.

Hiie Hinrikus1, Jaanus Lass1, Denis Karai1

  • 1a Department of Biomedical Engineering , Tallinn University of Technology , Tallinn , Estonia.

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Microwave radiation exposure accelerates diffusion in water by affecting hydrogen bonds between water molecules. This low-level microwave effect was observed to speed up the diffusion process significantly in experimental settings.

Keywords:
Diffusion in waterhydrogen bondinglow-level radiationmicrowave effectnon-thermal mechanism

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Area of Science:

  • Physics
  • Physical Chemistry
  • Biophysics

Background:

  • Microwave radiation is hypothesized to influence the hydrogen bonding network in water.
  • Understanding water molecule interactions is crucial for various scientific and industrial applications.

Purpose of the Study:

  • To investigate the effect of microwave radiation on the diffusion process in water.
  • To explore the potential mechanism involving hydrogen bond alterations and water viscosity.

Main Methods:

  • An experimental setup with two reservoirs connected by a thin tube was used.
  • Diffusion was monitored by measuring changes in NaCl concentration using solution resistance.
  • A 450 MHz continuous-wave microwave field was applied with a maximal specific absorption rate of 0.4 W/kg.

Main Results:

  • Microwave exposure significantly accelerated the diffusion process in water.
  • The time for a 10% reduction in solution resistance was 1.7 times shorter under microwave irradiation.
  • Water temperature remained stable with a standard deviation of 0.02°C during experiments.

Conclusions:

  • Low-level microwave radiation can enhance the diffusion rate in water.
  • The proposed mechanism involves microwave-induced high-frequency alterations of hydrogen bonds, affecting water viscosity.
  • This finding has implications for understanding non-thermal microwave effects on aqueous systems.