To study the effects of non-thermal low level microwaves, of light (550-850 nm) and near infrared radiation (1140-1200 nm) exposures on L-lactate dehydrogenase enzyme activity. The publication is a compilation of previous findings on non-thermal effects of electromagnetic irradiation at the molecular level.
Exposure duration: continuous for 240 s
|electric field strength||0.02135 V/m||-||-||-||-|
|electric field strength||0.06754 V/m||-||-||-||-|
|electric field strength||0.21358 V/m||-||-||-||-|
|electric field strength||0.675 V/m||-||-||-||-|
|electric field strength||2.136 V/m||-||-||-||-|
|power density||0.0000012 W/m²||-||-||-||-|
|power density||0.000012 W/m²||-||-||-||-|
|power density||0.00012 W/m²||-||-||-||-|
|power density||0.0012 W/m²||-||-||-||-|
|power density||0.012 W/m²||-||-||-||-|
The data showed that applied low intensity electromagnetic irradiation could induce some frequency specific alterations in conformation of the enzyme lactate dehydrogenase.
L-lactate dehydrogenase enzyme activity increased by 5-10% using low intensity microwaves at 500-525 MHz (for electric fields of 0.021-2.14 V/m). 900 MHz irradiation increased lactate dehydrogenase enzyme activity for electric fields in the range of 0.021-0.068 V/m and decreased enzyme activity if the field was stronger than 0.67 V/m. A slight inhibiting effect on enzyme activity at the frequencies of 650 MHz (0.214 V/m), 700 MHz (0.68-2.14 V/m) and for 875-925 MHz (0.68-2.14 V/m) was observed, when lactate dehydrogenase activity was decreased by 2-15%. In summary, the maximum increase in lactate dehydrogenase activity was observed at the two particular frequencies 500 MHz and 900 MHz.
These observed biological effects can be explained by possible resonant effects produced by the external electromagnetic irradiation at the molecular level.