研究のタイプ: 医学/生物学の研究 (experimental study)

[マイクロ波照射に対するアスペルギウス・ニジュランスおよびモジホコリの反応] med./bio.

Response of Aspergillus nidulans and Physarum polycephalum to microwave irradiation.

掲載誌: J Microw Power 1980; 15 (2): 75-80

この研究は、糸状菌(Aspergillus nidulans)およびモジホコリカビ(Physarum polycephalum)の遺伝的プロセスに対するマイクロ波の影響を調べた。菌の懸濁液に、遠方界のCWおよびパルス波パルス幅1 μs、パルス繰返し率600 pps)の2450 MHz電磁界(10 mW / cm2)のばく露を1時間与えた。その結果、発芽前および発芽中にばく露を受けた糸状菌の胞子では、生存率形態学的変異の発生頻度に変化は見られなかった;CWマイクロ波ばく露を受けたモジホコリカビにおける、3H-チミンのDNA取り込みは、対照群より5倍、温度対照群より2倍、増加した、と報告している。

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研究目的(著者による)

To investigate the effects of microwave exposure on two different kinds of fungi.

詳細情報

The organisms studied were: 1) Aspergillus nidulans, an Ascomycete and 2) Physarum polycephalum, a Myxomycete. Spores of A. nidulans were exposed before and during germination to investigate changes in survival rate and morphological appearance. On P. polycephalum the incorporation of radioactive labeled 3H-Thymine into DNA under microwave exposure was studied.
(evaluator's notice: the authors have used Physar-i-um in the headline and Physarum in the text. According to the NCBI taxonomy database the latter orthography is the right one.)

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 2.45 GHz
Modulation type: CW
ばく露時間: 1 h
ばく露2: 2.45 GHz
Modulation type: pulsed
ばく露時間: 1 h

ばく露1

主たる特性
周波数 2.45 GHz
特性
  • far field
ばく露時間 1 h
Modulation
Modulation type CW
ばく露装置
ばく露の発生源/構造
Additional information Control cultures were treated simultaneously; one set of controls were incubated under standard conditions (9 or 25), and thermal controls were incubated in a water bath at the same temperature (22°C) of those subjected to irradation.
パラメータ
測定量 種別 Method Mass 備考
電力密度 100 mW/cm² mean 測定値 - -

ばく露2

主たる特性
周波数 2.45 GHz
特性
  • far field
ばく露時間 1 h
Modulation
Modulation type pulsed
Pulse width 1 µs
Packets per second 600
ばく露装置
ばく露の発生源/構造
パラメータ
測定量 種別 Method Mass 備考
電力密度 100 mW/cm² mean 測定値 - -

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
調査の時期:
  • ばく露後

研究の主なアウトカム(著者による)

No changes in survival rate and morphological mutations were found in A. nidulans.
The investigation on the 3H-Thymine incorporation into DNA by P. polycephalum showed the following result: The incorporation rate found under conditions of microwave exposure was nearly five times greater than in control group and about twice than found in thermal control group. But on the basis of the results a simple thermal activation could not be excluded; in other words: the observed increase can not clearly ascribe to exposure specifc parameters alone.

研究の種別:

研究助成

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