极低频

这种黑洞很可能用作地下天线能够充电电池潜艇在太平洋和印度洋，通过极低频广播。

Such a hole is likely used as an underground antenna able to recharge the batteries of submarines in the Pacific and Indian Ocean through ELF broadcasts .

关于长期影响，由于有关接触极低频磁场与儿童期白血病之间联系的证据薄弱，所以减少接触对健康的益处并不清楚。

Regarding long-term effects , given the weakness of the evidence for a link between exposure to ELF magnetic fields and childhood leukaemia , the benefits of exposure reduction on health are unclear .

极低频电磁场对小鼠睾丸细胞DNA以及精子染色质结构的影响

Effects of extremely low frequency electromagnetic fields on DNA of testicular cells and sperm chromatin structure in mice

结论：细胞色素氧化酶C亚单位的差异表达从另一个侧面证实了之前提出的再灌注损伤中细胞色素氧化酶C的重要作用。极低频磁场对细胞色素氧化酶亚基1基因转录水平的影响

CONCLUSION : Cytochrome C oxidase mRNA level changs during brain ischemia / reperfusion . The effect of extremely low frequency magnetic fields on cytochrome oxidase subunit 1 mRNA transcription

极低频电磁场对大鼠C6胶质瘤细胞作用的实验研究

Effect of Extremely Low Frequency Electromagnetic Fields on Rat C6 Glioma Cells

基于Duffing振子的微弱极低频信号检测研究

Research of Weak VLF Signal Detection Based on Duffing Oscillators

极低频磁场对肝癌细胞株BEL-7402的作用初步观察

Effects of extremely low frequency electromagnetic field on BEL-7402 cell lines of liver carcinoma

极低频电场下HHM模型的多参数Hopf分岔分析

Multi-parameter Hopf-bifurcation in Hodgkin-Huxley Model Exposed to ELF External Electric Field

作者建立了一个场强到140kV/m的半自动极低频（ELF）场强自动校准系统。

A semi-automatic extremely low frequency ( ELF ) field-strength meter calibration system has been established by author .

135Hz极低频电磁场对HepG-2细胞生长及凋亡的影响

Growth and apoptosis of Hep G-2 cells affected by extremely low-frequency electromagnetic field

目的研究电磁噪声对50Hz工频磁场诱导细胞内应激活化蛋白激酶（stressactivatedproteinkinase，SAPK）磷酸化的影响，探索电磁噪声对极低频磁场生物效应可能存在的干预作用。

Objective To investigate the possible interference effect of electromagnetic noise exposure on phosphorylation of stress activated protein kinase ( SAPK ) induced by 50 Hz magnetic field ( MF ) .

但是，同时施加一个极低频（ELF）噪声磁场（rms：10μT），上述负效应完全消失。

However the behavioral deficit totally disappeared by adding an extremely lower frequency ( ELF ) noise magnetic field ( rms : 10 μ T ) .

l为什麽要担心暴露在极低频电磁场内会致癌？

Why is there concern about a possible risk of cancer from exposure to ELF electric and magnetic fields ?

极低频弱磁场对PC-12瘤细胞胞内游离钙离子浓度的影响

Effects of Extremely Low Frequency Weak Magnetic Fields on the Intracellular Free Calcium Concentration in PC-12 Tumor Cells

质量较差的阴极保护系统（ICCP）中的电源滤波器也会导致极低频电场的产生。

The power supply filter of poor quality which is often used in ICCP can also lead to ELFE .

这些是天然地存在于地球的“电磁”空腔&地面和电离层之间的空间中的极低频（ELF）准驻波。

These are quasi-standing extremely low frequency ( ELF ) waves that naturally exist in the earth ´ s'electromagnetic ´ cavity , the space between the ground and the ionosphere .

个中的要害是极低频（ELF）和甚高频（VHF）频次切实能够从地球的电离层被发射到世界范围的各个“空中波应急收集”（GWEN）塔的HAARP项目。

A key to this is the HAARPproject where ELF and VHF frequencies can indeed be beamed off ofthe Earth 's ionosphere to various GWEN towers world-wide .

RR间期平均值（MRR）、极低频（VLF）、低频与高频的比值（LF/HF）在两组间差异无显著性（P>0.05）。

With regard to MRR , VLF and the ratio of LF / HF , there were no remarkable differences between the subjects and the control ( P > 0 05 ) .

结论：50Hz，20mT极低频磁场能在体外诱导人肝癌细胞SK-HEP-1发生凋亡。

CONCLUSION : Apoptosis of human liver cancer cell SK-HEP-1 could be induced by 50 Hz , 20 mT magnetic field in vitro .

目的研究0.1Hz极低频交变磁场全身暴露对金黄地鼠眼视网膜内多巴胺含量的影响。

Objective To study changes of retinal dopamine levels after exposure to 0.1 Hz extreme low frequency alternative magnetic field in hamsters .

实验组进行频率为12Hz、强度为0.9mT交变极低频电磁场暴露，每天暴露8h，连续15d，对照组不进行电磁场暴露。

Rats in experiment group were exposed to a ( 12 Hz ) 0.9 mT ELF EMFs for 8 hours per day , and continuously for 15 days . The rats in control group were not exposed .

结论：5Hz和20Hz极低频正弦交变磁场以不同的效应模式促进NSC神经元向的分化，极低频正弦交变磁场可以成为NSC定向分化研究的重要手段之一。

CONCLUSION : 20 Hz and 5 Hz EMFs promote the differentiation of midbrain NSCs to a neuronal phenotype in different ways , suggesting that extremely low-frequency sinusoidal alternating EMF can be an important way to study the differentiation of NSCs .

结论频率为12Hz、强度为0.9mT的极低频电磁场可能具有增加抗氧化酶活力，使大鼠脑组织抗氧化能力增强的作用。

Conclusions 12 Hz 0.9 mT ELF EMFs might have the function of increasing the activity of anti-oxidative enzyme and the anti-oxidation ability in the brain of rats .

目的研究电脑阴极射线管显示器正前方不同距离和不同方位的极低频磁场（ELFMF）强度，就如何减少ELFMF的影响提出初步建议。

Objectives To investigate intensity of extremely low frequency magnetic field ( ELFMF ) emitted from cathode-ray tubes ( CRT ) of monitors in various directions and to find ways to avoid its influence .

采用极低频电磁场（ELF-EMF）干扰，对啮齿类动物的生殖系统造成毒性影响的效果已经引起人们的普遍关注，有研究发现小鼠在ELF-EMF暴露下，生殖系统在发育过程中受到不良影响。

Effect of ELF-EMF interference , which cause toxic effects in the reproductive system of rodents has caused widespread concern , studies have found that mice F exposure to ELF-EMF , reproductive system development during adverse impact .

研制了一种极低频（ELF）脉冲磁场发生仪，其输出脉冲磁场的频率在0～1kHz、强度在0～1T范围内连续线性可调；

A kind of pulse magnetic field generator with the extremely low frequency ( ELF ) is developed , whose frequency of the output pulse magnetic field is 0-1 kHz with the intensity in the range of 0-1 T within which the continuous linearity is adjustable .

一种用于地球物理探测的人工超低频/极低频电磁场源

An Artificial ULF / ELF Electromagnetic Source Used in Geophysical Prospecting

极低频电磁场对植物及人体细胞生长的影响

Effect on plant and human cells under low frequency magnetic field

极低频多波形电磁场发生仪的研制与应用研究

Development and Application of Extremely Low Frequency Multi-waveform Electromagnetic Field Generator

生物细胞在极低频电磁场中的效应

The Biological Effects of Low Frequency Electromagnetic Fields on Cells