To investigate the effects of pulsed magnetic field (PMF) on cholesterol and triglyceride levels in blood plasma of rats.
Cholesterol and triglyceride levels in blood plasma are to a large extent due to liver function. To look for an effect of PMF exposure in liver function these parameters were selected. Also the ratio of liver to body weight were examined.
| Exposure | Parameters |
|---|---|
|
Exposure 1:
12 Hz
Modulation type:
pulsed
Exposure duration:
1 hr
|
|
|
Exposure 2:
50 Hz
Modulation type:
pulsed
Exposure duration:
1 hr
|
|
|
Exposure 3:
100 Hz
Modulation type:
pulsed
Exposure duration:
1 hr
|
|
|
Exposure 4:
300 Hz
Modulation type:
pulsed
Exposure duration:
1 hr
|
|
|
Exposure 5:
460 Hz
Modulation type:
pulsed
Exposure duration:
1 hr
|
|
| Frequency | 12 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 1 hr |
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 6 mT | - | unspecified | - | - |
| Frequency | 50 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 1 hr |
| Exposure source |
|
|---|
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 6 mT | - | unspecified | - | - |
| Frequency | 100 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 1 hr |
| Exposure source |
|
|---|
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 6 mT | - | unspecified | - | - |
| Frequency | 300 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 1 hr |
| Exposure source |
|
|---|
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 6 mT | - | unspecified | - | - |
| Frequency | 460 Hz |
|---|---|
| Type | |
| Waveform | |
| Exposure duration | 1 hr |
| Exposure source |
|
|---|
| Measurand | Value | Type | Method | Mass | Remarks |
|---|---|---|---|---|---|
| magnetic flux density | 6 mT | - | unspecified | - | - |
Two different designs of experiment were carried out:
1) Following 1 h of exposure at different frequencies the parameters were examined 24 h after exposure. Cholesterol was significantly reduced at 12 Hz and 460 Hz. Triglycerides were reduced at 12 Hz and 100 Hz. At 12 Hz the liver to body ratio was increased. 50 Hz and 300 Hz exposures had no detectable effects.
2) Following 1 h of exposure at 12 Hz the parameters were examined at different time-points (directly after exposure, 3, 4, 6, 8, 16, 24, 48, and 96 h after exposure). The main fact was a decrease in cholesterol and triglyceride levels, most obvious after 16 h and 24 h, respectively. However, significant increases of cholesterol were noticed 3 h and 8 h after exposure. Also increased levels of triglycerides were found 48 h after exposure. Liver to body weight ratio was increased 24 h after exposure.
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