Study type: Medical/biological study (experimental study)

Analysis of the effects of microwave energy on enzymatic activity of lactate dehydrogenase (LDH) med./bio.

By: Bini M, Checcucci A, Ignesti A, Millanta L, Rubino N, Camici G, Manao G, Ramponi G
Published in: J Microw Power 1978; 13 (1): 95-99
Download citation in RIS format

Aim of study (acc. to author)

To analyze the enzymatic activity of lactate dehydrogenase (LDH) during microwave irradiation with variable power levels at accurate control of energy absorption and temperature variations.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 3 GHz
Modulation type: CW
  • SAR: 33 mW/g minimum (unspecified) (165 W/kg, 330 W/kg, 660 W/kg, 990 W/kg, 1320 W/kg, 1650 W/kg.)
  • SAR: 1.98 W/g maximum
Exposure 2: 3 GHz
Modulation type: CW
  • SAR: 330 mW/g minimum (unspecified) (595 W/kg.)
  • SAR: 960 mW/g maximum

Exposure 1

Main characteristics
Frequency 3 GHz
Charakteristic
  • guided field
Modulation
Modulation type CW
Exposure setup
Exposure source
Setup Cuvette inserted into the waveguide.
Parameters
Measurand Value Type Method Mass Remarks
SAR 33 mW/g minimum determined by power loss unspecified 165 W/kg, 330 W/kg, 660 W/kg, 990 W/kg, 1320 W/kg, 1650 W/kg.
SAR 1.98 W/g maximum determined by power loss - -

Exposure 2

Main characteristics
Frequency 3 GHz
Charakteristic
  • guided field
Modulation
Modulation type CW
Exposure setup
Exposure source
Setup Cuvette inserted into the waveguide.
Parameters
Measurand Value Type Method Mass Remarks
SAR 330 mW/g minimum determined by power loss unspecified 595 W/kg.
SAR 960 mW/g maximum determined by power loss - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

The effects induced by microwave exposure on the accelerated enzyme velocity are ascribed to be only thermal. No changes could be induced in the enzyme activity by microwave irradiation when the energy absorption does not cause a temperature variation.

Study character:

Study funded by

Related articles