electromagnetic field

电磁场
  • 文章类型: Journal Article
    我们审查了几个系统评价中的第一个发表的一个,这是世卫组织新倡议的一部分,旨在评估人造射频电磁辐射(RF-EMF)与人类不良健康影响之间的关联。审查的审查涉及非人类哺乳动物的怀孕和出生结果的实验研究。该评论声称,分析的数据没有提供足够的结论来为监管层面的决策提供信息。我们的目的是评估此系统评价的质量,并评估其结论与孕妇及其后代的相关性。质量和相关性在审查本身的前提下进行了检查:例如,我们没有质疑论文的选择,也不是选择的统计方法。虽然世卫组织的系统审查表明自己是彻底的,科学,与人类健康相关,我们发现了许多问题,这些问题使得世卫组织的审查无关紧要且存在严重缺陷.发现的所有缺陷都扭曲了结果,以支持审查的结论,即没有确凿的非热效应证据。我们证明了底层数据,当相关研究被正确引用时,支持相反的结论:有明显的迹象表明RF-EMF暴露会产生有害的非热效应。许多已发现的缺陷揭示了系统偏斜的模式,旨在隐藏在复杂的科学严谨性背后的不确定性。这篇综述的方法偏差和质量低下令人高度关注,因为它有可能破坏世卫组织在人为RF-EMF危害人类健康方面的可信度和专业性。
    We examined one of the first published of the several systematic reviews being part of WHO\'s renewed initiative to assess the evidence of associations between man-made radiofrequency electromagnetic radiation (RF-EMF) and adverse health effects in humans. The examined review addresses experimental studies of pregnancy and birth outcomes in non-human mammals. The review claims that the analyzed data did not provide conclusions certain enough to inform decisions at a regulatory level. Our objective was to assess the quality of this systematic review and evaluate the relevance of its conclusions to pregnant women and their offspring. The quality and relevance were checked on the review\'s own premises: e.g., we did not question the selection of papers, nor the chosen statistical methods. While the WHO systematic review presents itself as thorough, scientific, and relevant to human health, we identified numerous issues rendering the WHO review irrelevant and severely flawed. All flaws found skew the results in support of the review\'s conclusion that there is no conclusive evidence for nonthermal effects. We show that the underlying data, when relevant studies are cited correctly, support the opposite conclusion: There are clear indications of detrimental nonthermal effects from RF-EMF exposure. The many identified flaws uncover a pattern of systematic skewedness aiming for uncertainty hidden behind complex scientific rigor. The skewed methodology and low quality of this review is highly concerning, as it threatens to undermine the trustworthiness and professionalism of the WHO in the area of human health hazards from man-made RF-EMF.
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  • 文章类型: Journal Article
    神经鞘瘤是由雪旺氏细胞(SC)的转化引起的周围神经系统的良性肿瘤。总的来说,这些肿瘤与神经纤维蛋白2型基因的改变有关,编码肿瘤抑制因子Merlin,属于ezrin-radixin-moesin家族的细胞骨架相关蛋白。然而,神经鞘瘤发病和进展的潜在机制尚未完全阐明,而其中一个挑战可能是环境。在这种情况下,暴露于电磁场(EMF),使用普通电气设备产生的,即使证据主要是流行病学证据,也被认为是SC转化的原因。的确,到目前为止,已经确定了解释SCs共转化的非实质性机制。最近,一些体外证据指出暴露于EMF的SC的增殖和迁移能力的改变(0.1T,50Hz,10分钟)。这里,我们使用相同的实验范式来讨论假定的表观遗传机制参与SC对EMF的适应,并解释暴露后低氧改变的发生.我们的发现表明一组环境诱导的SCs变化,朝着不太生理的状态,这可能与SCs分化和神经鞘瘤的发展在病理上有关。
    Schwannomas are benign tumors of the peripheral nervous system arising from the transformation of Schwann cells (SCs). On the whole, these tumors are related to alterations of the neurofibromin type 2 gene, coding for the oncosuppressor merlin, a cytoskeleton-associated protein belonging to the ezrin-radixin-moesin family. However, the underlying mechanisms of schwannoma onset and progression are not fully elucidated, whereas one of the challenges might be the environment. In this light, the exposure to electromagnetic field (EMF), generated by the use of common electrical devices, has been defiantly suggested as the cause of SCs transformation even if the evidence was mostly epidemiologic. Indeed, insubstantial mechanisms have been so far identified to explain SCs oncotransformation. Recently, some in vitro evidence pointed out alterations in proliferation and migration abilities in SCs exposed to EMF (0.1 T, 50 Hz, 10 min). Here, we used the same experimental paradigma to discuss the involvement of putative epigenetic mechanisms in SCs adaptation to EMF and to explain the occurrence of hypoxic alterations after the exposure. Our findings indicate a set of environmental-induced changes in SCs, toward a less-physiological state, which may be pathologically relevant for the SCs differentiation and the schwannoma development.
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  • 文章类型: Journal Article
    为了优化感应加热(IH)中间包的应用效果,以四通道IH中间包为研究对象。基于数值模拟方法,感应加热器和通道的不同相对放置角度对电磁场的影响,研究了中间包的流场和温度场。我们专注于比较通道的磁通密度(B)和电磁力(EMF)分布。结果表明,无论加热器和通道之间的相对放置角度如何,B在通道的中心圆形横截面中的分布是偏心的。当加热器绕通道1向中间包底部旋转时,B在通道的中心圆形横截面中的分布从水平偏心变为垂直偏心。通过对通道纵截面中B轮廓的分析,可以获得通道上部和下部之间的有效磁通密度面积差(ΔAB),从而定量分析B在本节中的分布。ΔAB的分布模式与电磁力在通道中心线的垂直方向(FZ)上的分布模式一致。随着加热器向下旋转,通道1的ΔAB和FZ逐渐增加。而通道2的那些在旋转角度为60°时达到最大值。与常规放置相比,当加热器旋转角度为60°时,通道1和通道2的出口流速分别下降15%和12%,分别。然而,通道2处的出口温度增加1.96K,并且在通道1和通道2的出口处的钢水流不再表现出显著的向下流动。这表明,当加热器旋转角度为60°时,它有双重优势。一方面,有助于减少钢水对槽道和出料室底部的侵蚀,另一方面,能更有效地发挥感应加热器对槽钢的加热作用。这为提高IH中间包的应用效果提供了新的途径。
    In order to optimize the application effect of induction heating (IH) tundishes, a four-channel IH tundish is taken as the research object. Based on numerical simulation methods, the influence of different relative placement angles of induction heaters and channels on the electromagnetic field, flow field and temperature field of the tundish is investigated. We focus on comparing the magnetic flux density (B) and electromagnetic force (EMF) distribution of the channel. The results show that regardless of the relative placement angle between the heater and the channel, the distribution of B in the central circular cross-section of the channel is eccentric. When the heater rotates around channel 1 towards the bottom of the tundish, the distribution of B in the central circular cross-section of the channel changes from a horizontal eccentricity to a vertical one. Through the analysis of the B contour in the longitudinal section of the channel, the difference in effective magnetic flux density area (ΔAB) between the upper and lower parts of the channel can be obtained, thereby quantitatively analyzing the distribution of B in this section. The distribution pattern of ΔAB is consistent with the distribution pattern of the electromagnetic force in the vertical direction (FZ) of the channel centerline. The ΔAB and FZ of channel 1 gradually increase as the heater rotates downwards, while those of channel 2 reach their maximum value at a rotation angle of 60°. Compared to the conventional placement, when the heater rotation angle is 60°, the outlet flow velocities at channel 1 and channel 2 decrease by 15% and 12%, respectively. However, the outlet temperature at channel 2 increases by 1.96 K, and the molten steel flow at the outlet of channel 1 and channel 2 no longer exhibits significant downward flow. This shows that when the heater rotation angle is 60°, it has a dual advantage. On the one hand, it is helpful to reduce the erosion of the molten steel on the channel and the bottom of the discharging chamber, and on the other hand, it can more effectively exert the heating effect of the induction heater on the molten steel in the channel. This presents a new approach to enhance the application effectiveness of IH tundish.
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  • 文章类型: Journal Article
    将物质分解为其成分,将我们引向我们所知道的最小粒子。这些颗粒形成由这些颗粒产生和携带的电磁场决定的材料结构。两种主要成分中的任何一种的变化都会导致该材料系统的变化,无论是活的有机体还是无生命的物体。后一种说法承载了生命的奥秘,生命是由一系列连续且程序化的系统变化产生的,这些变化是由具有未知功能机制的能源推动的。目前的工作是对上述的理解和潜在发现的理论方法,未知的细胞能量机制。了解细胞内生物化学的能量基础在人类和动物治疗中同样重要。此外,因为所有这些发现都为全球工业的各个领域提供了新颖的解决方案,这项理论工作的最终结果也带来了电子行业新发现的想法。
    Dissection of the matter into its constituents leads us to the smallest particles that we know. These particles form a material structure that is determined by the electromagnetic field generated and carried by those particles. Changes in any of the two major constituents leads to changes in that material system, be it a living organism or a lifeless object. The latter statement carries the mystery of life that is born from a continuous and programmed series of system changes fuelled by an energy source with a yet unknown functioning mechanism. The present work is a theoretical approach towards the understanding and potential discovery of the aforementioned, not-yet-known cellular energetic mechanism. Understanding the energetic basis of intracellular biochemistry is equally important in human and animal therapeutics. Additionally, as all such discoveries offer novel solutions in various fields of the global industry, the final outcome of this theoretical work also brings about the idea of a new discovery in electronics industry.
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  • 文章类型: Journal Article
    创伤性脑损伤(TBI)是发病的主要原因,残疾,和全世界的死亡率。运动和认知缺陷以及情绪障碍是TBI的长期后果。缺乏有效的治疗TBI引起的神经损伤,功能障碍,认知缺陷使得TBI后的恢复具有挑战性。原因之一可能是缺乏关于TBI的复杂病理生理学和参与炎症的细胞和分子机制的调节因素的知识。神经再生,和损伤修复。这些机制涉及由基因编码的各种蛋白质表达的变化,这些基因的表达在转录水平上受到转录因子(TF)和在mRNA水平上受到微小RNA(miR)的调节。在这项试点研究中,我们对尤卡坦小型猪大脑的损伤组织和非损伤组织进行了RNA测序,并使用计算机分析分析了差异表达基因(DEG)和调节DEG表达的TFs和miR的测序数据.我们还比较了电磁场(EMF)对受伤的小酒对各种DEG表达谱的影响。该初步研究的结果揭示了在损伤的脑组织中显著上调的一些DEGs,并且EMF刺激显示出对它们的表达谱的影响。
    Traumatic brain injury (TBI) is a leading cause of morbidity, disability, and mortality worldwide. Motor and cognitive deficits and emotional disturbances are long-term consequences of TBI. A lack of effective treatment for TBI-induced neural damage, functional impairments, and cognitive deficits makes it challenging in the recovery following TBI. One of the reasons may be the lack of knowledge underlying the complex pathophysiology of TBI and the regulatory factors involved in the cellular and molecular mechanisms of inflammation, neural regeneration, and injury repair. These mechanisms involve a change in the expression of various proteins encoded by genes whose expression is regulated by transcription factors (TFs) at the transcriptional level and microRNA (miRs) at the mRNA level. In this pilot study, we performed the RNA sequencing of injured tissues and non-injured tissues from the brain of Yucatan miniswine and analyzed the sequencing data for differentially expressed genes (DEGs) and the TFs and miRs regulating the expression of DEGs using in-silico analysis. We also compared the effect of the electromagnetic field (EMF) applied to the injured miniswine on the expression profile of various DEGs. The results of this pilot study revealed a few DEGs that were significantly upregulated in the injured brain tissue and the EMF stimulation showed effect on their expression profile.
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  • 文章类型: Journal Article
    先天性肾脏和泌尿道异常(CAKUT)是儿童慢性肾脏疾病(CKD)的主要原因。大多数病例的病因被认为是多因素的。在这项研究中,研究了CAKUT的危险因素和孕期手机相关电磁场(EMF)暴露的影响.
    纳入57例2岁以下的健康对照者,并对其母亲进行问卷调查。比较了父母的人口统计学,孕前(慢性病,身体质量指数,使用叶酸补充剂)和产前变量(妊娠期疾病,怀孕期间体重增加,)和怀孕期间的暴露。为了评估与手机相关的辐射暴露,所有参与者都被问及他们每天的通话时间,手机不使用时的距离,以及他们手机的型号。记录了移动电话的比吸收率(SAR)和有效SAR值(SAR×通话时间)作为EMF暴露的指标。
    怀孕期间体重指数的增加与CAKUT的风险增加有关(p=0.012)。怀孕前使用叶酸对CAKUT具有保护作用(p=0.028)。CAKUT组母亲的呼叫时间明显长于对照组(p=0.001)。观察到较高的有效SAR值与CAKUT风险增加之间存在关联(p=0.03)。然而,手机在不使用时与母亲身体的距离没有被发现是一个危险因素。
    CAKUT的病因是多因素的。我们的结果表明,怀孕期间长时间的电话和更高的EMF暴露会增加后代CAKUT的风险。
    UNASSIGNED: Congenital anomalies of the kidney and urinary tract(CAKUT) are the leading causes of childhood chronic kidney disease (CKD). The etiology of most of the cases is thought to be multifactorial. In this study, risk factors for CAKUT and the effect of mobile phone-related electromagnetic field (EMF) exposure during pregnancy were investigated.
    UNASSIGNED: Fifty-seven cases and 57 healthy controls under 2 years of age were included and their mothers were subjected to a questionnaire. Groups were compared for parents\' demographics, pregestational (chronic disease, body mass index, use of the folic acid supplements) and antenatal variables (gestational disease, weight gain during pregnancy,) and exposures during pregnancy. To assess mobile phone-related radiation exposure, all participants were asked about their daily call time, the proximity of the phone when not in use, and the models of their mobile phones. The specific absorption rate (SAR) of the mobile phones and the effective SAR value (SAR × call time) as an indicator of EMF exposure were recorded.
    UNASSIGNED: Excess weight gain according to BMI during pregnancy was related to an increased risk of CAKUT (p=0.012). Folic acid use before pregnancy was protective for CAKUT (p = 0.028). The call time of mothers of the CAKUT group was significantly longer than the control (p = 0.001). An association was observed between higher effective SAR values and increased risk of CAKUT (p = 0.03). However the proximity of the mobile phone to the mother\'s body when not in use was not found as a risk factor.
    UNASSIGNED: The etiology of CAKUT is multifactorial. Our results suggest that prolonged phone call and higher EMF exposure during pregnancy increases the risk of CAKUT in the offspring.
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  • 文章类型: Journal Article
    本文的目的是证明有关材料与非常低的无线电频率之间相互作用的新发现。具体来说,当使用特定频率(约2-4kHz)照射目标药物样品如阿司匹林或对乙酰氨基酚药物时,我们观察到惯性有源传感器上的反馈响应.这种现象的特点,如激励和弛豫时间,减速度与物料数量之间的关系,和信号幅度,进行了介绍和分析。尽管这种现象的基本物理学尚不清楚,我们已经证明了它在化合物的远程识别中具有潜在的应用,检测,和位置感应,以及在不需要任何处理的情况下识别植物中存在的物质。这种方法是快速的,准确,低成本,非破坏性的,非侵入性,使其成为进一步研究的宝贵领域,将来可能会产生惊人的结果。
    The purpose of this paper is to demonstrate a new discovery regarding the interaction between materials and very low radio frequencies. Specifically, we observed a feedback response on an inertia active sensor when specific frequencies (around 2-4 kHz) are used to irradiate targeted pharmaceutical samples like aspirin or paracetamol drugs. The characteristics of this phenomenon, such as excitation and relaxation time, the relation between deceleration and a material\'s quantity, and signal amplitude, are presented and analyzed. Although the underlying physics of this phenomenon is not yet known, we have shown that it has potential applications in remote identification of compounds, detection, and location sensing, as well as identifying substances that exist in plants without the need for any processing. This method is fast, accurate, low-cost, non-destructive, and non-invasive, making it a valuable area for further research that could yield spectacular results in the future.
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  • 文章类型: Journal Article
    这篇综述的目的是评估手机辐射效应对绿色植物的影响。网络和通信系统的快速发展通过使用大功率无线电发电机,以更高的允许频带和更快的速度向世界引入了频率和幅度调制技术,这促进了高清晰度的连接,快速传输较大的数据文件,和快速多次访问。这些导致来自许多来源的细胞辐射频繁地暴露于生物世界。关键因素,比如一系列频率,持续时间,功率密度,发现电场对绿色植物的生长和发育有不同的影响。就本综述对绿色植物的影响而言,它们的形态特征如整体生长的改变,树冠密度,以及色素沉着对叶绿素荧光和膜电位变化等生理变化的影响。被发现受到细胞辐射的影响。另一方面,细胞的氧化状态升高,大分子损伤,经常发现脂质过氧化。在染色体水平上,微核形成,主轴分离装置,和增加的有丝分裂指数等。已经被注意到了。由于细胞辐射的影响,转录因子在许多情况下被发现过表达。这显示了分子水平的影响。
    The aim of this review is to assess the impact of cell phone radiation effects on green plants. Rapid progress in networking and communication systems has introduced frequency- and amplitude-modulated technologies to the world with higher allowed bands and greater speed by using high-powered radio generators, which facilitate high definition connectivity, rapid transfer of larger data files, and quick multiple accesses. These cause frequent exposure of cellular radiation to the biological world from a number of sources. Key factors like a range of frequencies, time durations, power densities, and electric fields were found to have differential impacts on the growth and development of green plants. As far as the effects on green plants are concerned in this review, alterations in their morphological characteristics like overall growth, canopy density, and pigmentation to physiological variations like chlorophyll fluorescence and change in membrane potential etc. have been found to be affected by cellular radiation. On the other hand, elevated oxidative status of the cell, macromolecular damage, and lipid peroxidation have been found frequently. On the chromosomal level, micronuclei formation, spindle detachments, and increased mitotic indexes etc. have been noticed. Transcription factors were found to be overexpressed in many cases due to the cellular radiation impact, which shows effects at the molecular level.
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  • 文章类型: Journal Article
    本文研究了牛肝脏线粒体的光生物调节作为能量转化的热力学过程。通过考虑感兴趣的光生物调节实验的特定设置来进行该分析。它允许,特别是,受激细胞器中电磁场和相关能量的计算。在实验之后以规则的时间间隔进行由照射的线粒体产生的过量的生化功率密度的测量。计算和测量最终使我们能够获得有关将电磁能转化为分离的细胞器释放的过量生化能的过程效率的第一个结果。
    In this paper the photobiomodulation on isolated mitochondria of bovine liver is studied as a thermodynamic process of conversion of energy. This analysis is conducted by considering a particular set-up for the photobiomodulation experiments of interest. It allows, in particular, the computation of the electromagnetic field and the related energetic quantities in the stimulated organelles. The measurements of the excess of biochemical power density produced by the illuminated mitochondria are performed at regular time intervals after the experiments. The calculations and the measurements finally allow us to obtain the first results on the efficiency of the process of conversion of electromagnetic energy into excess of biochemical energy released by the isolated organelles.
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  • 文章类型: Journal Article
    背景:本研究旨在通过评估基因表达和细胞因子及趋化因子分泌的改变,探讨极低频电磁场(ELF-EMF)对肾透明细胞癌(ccRCC)的影响。
    方法:三种ccRCC细胞系(786-O,769-P,和CAKI-1)和健康的HEK293细胞系进行ELF-EMF暴露(频率50Hz,磁场强度4.5mT),每天30分钟,持续5天。该研究检测了ADAM28,NCAM1和VEGFC基因的表达,伴随着30种细胞因子和趋化因子的分泌。
    结果:值得注意的是,原发性肿瘤来源的细胞系,但不是那些来自转移部位的,表现出ADAM28基因表达,在ELF-EMF暴露后增加。在ELF-EMF暴露后,在769-P细胞中观察到VEGFC基因表达的统计学显着降低。此外,NCAM1基因表达在HEK293,769-P,和786-O细胞,代表正常胚胎肾细胞和原代肿瘤细胞,但不是在CAKI-1细胞中,为转移部位建模。EMF暴露后,HEK293和CAKI-1细胞系的细胞培养上清液中转化生长因子β1(TGF-β1)浓度有统计学上的显着降低,在测试的细胞因子的分泌中没有其他显著变化。
    结论:根据研究结果和现有研究,在得出关于ELF-EMF对ccRCC进展的潜在抑制作用的结论时,需要谨慎。在评估人类环境中EMF的影响时,必须对实验模型进行标准化。
    BACKGROUND: The study aimed to investigate the influence of extremely low-frequency electromagnetic fields (ELF-EMF) on clear cell renal cell carcinoma (ccRCC) by assessing alterations in gene expression and the secretion of cytokines and chemokines.
    METHODS: Three ccRCC cell lines (786-O, 769-P, and CAKI-1) and a healthy HEK293 cell line were subjected to ELF-EMF exposure (frequency 50 Hz, magnetic field strength 4.5 mT) for 30 min daily for 5 days. The study examined the expression of ADAM28, NCAM1, and VEGFC genes, along with the secretion of 30 cytokines and chemokines.
    RESULTS: Notably, primary tumor-derived cell lines, but not those from metastatic sites, exhibited ADAM28 gene expression, which increased following ELF-EMF exposure. A statistically significant reduction in VEGFC gene expression was observed in 769-P cells after ELF-EMF exposure. Additionally, NCAM1 gene expression was upregulated in HEK293, 769-P, and 786-O cells, representing normal embryonic kidney cells and primary tumor cells, but not in CAKI-1 cells, which model metastatic sites. After EMF exposure, there was a statistically significant decrease in transforming growth factor β1 (TGF-β1) concentration in the cell culture supernatants of HEK293 and CAKI-1 cell lines, with no other significant changes in the secretion of tested cytokines.
    CONCLUSIONS: Given the study\'s findings and available research, caution is warranted when drawing conclusions about the potential inhibitory effect of ELF-EMF on ccRCC progression. Standardization of experimental models is imperative when assessing the effects of EMF in a human context. Med Pr Work Health Saf. 2024;75(2):133-141.
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