この研究は、ELF磁界によるL929線維芽細胞でのオルニチンデカルボキシラーゼ活性増強に必要な最小コヒーレンス時間などを報告している著者が、振幅変調915MHzマイクロ波でも、オルニチンデカルボキシラーゼ活性増強において非常に類似したコヒーレンス時間現象を見出し、そのコヒーレンス効果について、マイクロ波の振幅変調周波数を変えて、さらに探求した実験結果を報告している。
The detailed summary of this article is not available in your language or incomplete. Would you like to see a complete translation of the summary? Then please contact us →
To investigate the effects of extremely low frequency amplitude modulated microwaves on the activity of the ornithine decarboxylase enzyme (catalyses the reaction of ornithine into putrescine and CO2) in dependence of so-called coherence time. Coherence time here is used in the meaning of a defined time interval over which frequency, phase, and amplitude of the field can be reasonably predicted.
| 周波数 | 915 MHz |
|---|---|
| タイプ |
|
| 特性 |
|
| ばく露時間 | continuous for 8 h |
| Modulation type | AM |
|---|---|
| Modulation frequency | 55–65 Hz |
| Modulation depth | 23 % |
| Additional information |
The modulation signal was periodically switched between 55 and 65 Hz. The operating time for each frequency was selected as a fixed period τ (between 0.1 and 50 s) and a random period Δτ (between 0 and 50 ms). |
| ばく露の発生源／構造 | |
|---|---|
| チャンバの詳細 | A Crawford cell was placed in an incubator chamber maintained at 37°C. The Crawford cell was mounted vertically on a rotary table and provided with an access door to facilitate sample insertion. |
| ばく露装置の詳細 | Two tissue culture flasks (25 cm², 50 ml) were placed end to end on each side of the center conductor parallel to the EF and perpendicular to the direction of propagation. Four control flasks were placed in the same incubator at the same height as the exposed cultures. |
| Additional information | A double stub tuner was used to match the impedance of the loaded Crawford cell. Due to the size of the flasks, the ideal uniform exposure configuration could not be achieved. From 5 to 12 separate experiments were performed for each exposure condition (frequency, and coherence time in random order). |
| 周波数 | 915 MHz |
|---|---|
| タイプ |
|
| 特性 |
|
| ばく露時間 | continuous for 8 h |
| ばく露の発生源／構造 |
|
|---|
The activity of ornithine decarboxylase in cells exposed to unmodulated microwaves was found not to be altered. The enzyme activity was enhanced approximately two-fold in cells exposed to modulated microwaves at all frequencies used but only for coherence times greater than 10 seconds. Up to now the way how amplitude modulated microwaves affect cells still remains unknown.
このウェブサイトはクッキー（Cookies）を使って、最善のブラウジングエクスペリエンスを提供しています。あなたがこのウェブサイトを継続して使用することで、私たちがクッキーを使用することを許可することになります。
