Litovitz T A, Krause D, Penafiel M, Elson E C, Mullins J M
Vitreous State Laboratory, Catholic University of America, Washington, DC 20064.
Bioelectromagnetics. 1993;14(5):395-403. doi: 10.1002/bem.2250140502.
Previously, we demonstrated the requirements for a minimum coherence time of an applied, small amplitude (10 microT) ELF magnetic field if the field were to produce an enhancement of ornithine decarboxylase activity in L929 fibroblasts. Further investigation has revealed a remarkably similar coherence time phenomenon for enhancement of ornithine decarboxylase activity by amplitude-modulated 915 MHz microwaves of large amplitude (SAR 2.5 W/kg). Microwave fields modulated at 55, 60, or 65 Hz approximately doubled ornithine decarboxylase activity after 8 h. Switching modulation frequencies from 55 to 65 Hz at coherence times of 1.0 s or less abolished enhancement, while times of 10 s or longer provided full enhancement. Our results show that the microwave coherence effects are remarkably similar to those observed with ELF fields.
此前，我们证明了如果应用的小幅度（10微特斯拉）极低频磁场要在L929成纤维细胞中增强鸟氨酸脱羧酶活性，对其最小相干时间的要求。进一步研究发现，对于大幅度（比吸收率2.5瓦/千克）的调幅915兆赫微波增强鸟氨酸脱羧酶活性，存在非常相似的相干时间现象。在55、60或65赫兹调制的微波场在8小时后可使鸟氨酸脱羧酶活性增加约一倍。在1.0秒或更短的相干时间将调制频率从55赫兹切换到65赫兹会消除增强效果，而10秒或更长时间则能实现完全增强。我们的结果表明，微波相干效应与极低频磁场中观察到的效应非常相似。
