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Functional indices of the cardiovascular system (heart rate, systolic, mean, and diastolic pressures) were selected to represent biological endpoints that may be susceptible to the ultrawide-band radiation.
| ばく露 | パラメータ |
|---|---|
|
ばく露1:
0.09–2.78 GHz
Modulation type:
pulsed
ばく露時間:
continuous for 6 min
|
|
|
ばく露2:
0.1–2.5 GHz
Modulation type:
pulsed
ばく露時間:
continuous for 6 min
|
| 周波数 | 0.09–2.78 GHz |
|---|---|
| タイプ |
|
| 波形 |
|
| 特性 |
|
| ばく露時間 | continuous for 6 min |
| Additional information | medium frequency 0.5 GHz, fractional bandwidth 187%, estimated according to Foster, P. R.: Antennas and UWB signals. In: Taylor, J. D., ed. Introduction to ultra-wideband radar systems. Boca Raton, FL: CRC Press; 1995:237-248. |
| Modulation type | pulsed |
|---|---|
| Pulse width | 1 ns |
| Rise time | 180 ps |
| Repetition frequency | 500 Hz |
| ばく露の発生源／構造 |
|
|---|---|
| Distance between exposed object and exposure source | 72.7 cm |
| チャンバの詳細 | The tapered parallel plate GTEM cell (a flared rectangular coaxial transmission line) was 190 cm long and 92 cm high at the end. The lower compartment was 38.5 cm wide and 16.5 cm high at the rat's location. |
| ばく露装置の詳細 | Rats were placed in an exposure holder made from an acrylic tube (6.5 cm i.d., 3.2 mm wall thickness, 28 cm length) with ventilation slots and polyethylene endcaps. The major axis of the animal was placed in parallel with the magnetic vector at 72.7 cm from the source end of the GTEM cell. The animal was isolated from the ground plane by placing the exposure holder on an acrylic stand of 4.2 cm height. |
| Sham exposure | A sham exposure was conducted. |
| Additional information | During sham exposure, all UWB conditions were maintained except for the trigger pulses to cause the spark. |
| 周波数 | 0.1–2.5 GHz |
|---|---|
| タイプ |
|
| 波形 |
|
| 特性 |
|
| ばく露時間 | continuous for 6 min |
| Additional information | medium frequency 0.49 GHz, fractional bandwidth 185% |
| Modulation type | pulsed |
|---|---|
| Pulse width | 1.03 ns |
| Rise time | 200 ps |
| Repetition frequency | 1,000 Hz |
| ばく露の発生源／構造 |
|
|---|
Significant decrease in arterial blood pressure (hypotension) was found. In contrast, heart rate was not altered by these exposures. The ultrawide-band radiation-induced hypotension was a robust, consistent, and persistent effect.
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