Wearable slot antenna at 2.45 GHz for off‐body radiation: Analysis of efficiency, frequency shift, and body absorption
The interaction of body‐worn antennas with the human body causes a significant decrease in antenna efficiency and a shift in resonant frequency. A resonant slot in a small conductive box placed on the body has been shown to reduce these effects. The specific absorption rate is less than international health standards for most wearable antennas due to small transmitter power. This paper reports the linear relationship between power absorbed by biological tissues at different locations on the body and radiation efficiency based on numerical modeling (r = 0.99). While the −10 dB bandwidth of the antenna remained con...
Source: Bioelectromagnetics - September 12, 2017 Category: Radiology Authors: Marta Fernandez, Hugo G. Espinosa, David V. Thiel, Amaia Arrinda Tags: Research Article Source Type: research
Issue Information ‐ Page
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 8, 2017 Category: Radiology Tags: Issue Information ‐ Page Source Type: research
Comments on assessment of polarization dependence of body shadow effect on dosimetry measurements in 2.4GHz band
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 7, 2017 Category: Radiology Authors: Arno Thielens, Luc Martens, Wout Joseph Tags: Comment Source Type: research
Responses to comments on assessment of polarization dependence of body shadow effect on dosimetry measurements in the 2.4 GHz band
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - September 1, 2017 Category: Radiology Authors: Silvia de Miguel ‐Bilbao, Victoria Ramos, Juan Blas Tags: Response Source Type: research
Effects of static magnetic fields on the enteropathogenic Escherichia coli
In conclusion, the SMF treatment of 107 mT for 30 min reduced EPEC E2348/69 autoaggregation and modified its adherence pattern, with both events likely being associated with changes in BFP expression. Bioelectromagnetics. 2017;9999:XX–XX. © 2017 Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - August 25, 2017 Category: Radiology Authors: Mar ía A. Quiñones‐Peña, Gustavo Tavizon, José L. Puente, Claudia Martínez‐Anaya, Ulises Hernández‐Chiñas, Carlos A. Eslava Tags: Research Article Source Type: research
Forced acoustic oscillations of biological cell
This article considers the possibility of excitation of acoustic oscillations in a cell by electromagnetic waves. In this process, not only the frequency but also the length of a wave is of great importance. It is also reported that the pulse signal can be more effective than harmonic signal, and the pulse length is not essential. In accordance with this fact, it is possible to explain the biological effects of electromagnetic waves and to develop new medical electronic devices. Bioelectromagnetics. 2017;9999:XX–XX. © 2017 Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - August 24, 2017 Category: Radiology Authors: Aleksandr V. Kharlanov Tags: Research Article Source Type: research
Millimeter ‐wave emissivity as a metric for the non‐contact diagnosis of human skin conditions
A half‐space electromagnetic model of human skin over the band 30–300 GHz was constructed and used to model radiometric emissivity. The model showed that the radiometric emissivity rose from 0.4 to 0.8 over this band, with emission being localized to a layer approximately one millimeter deep in the skin. Simulations of skin with differing water contents associated with psoriasis, eczema, malignancy, and thermal burn wounds indicated radiometry could be used as a non‐contact technique to detect and monitor these conditions. The skin emissivity of a sample of 30 healthy volunteers, measured using a 95 GHz radiomete...
Source: Bioelectromagnetics - August 24, 2017 Category: Radiology Authors: Amani Yousef Owda, Neil Salmon, Stuart William Harmer, Sergiy Shylo, Nicholas John Bowring, Nacer Ddine Rezgui, Mamta Shah Tags: Research Article Source Type: research
Pulsed electromagnetic fields promote the proliferation and differentiation of osteoblasts by reinforcing intracellular calcium transients
In this study, we demonstrated the effects of PEMF on proliferation and differentiation of osteoblasts using the model of calcium transients induced by high extracellular calcium. Our results showed that PEMF can increase both the percentage of responding cells and amplitude of intracellular calcium transients induced by high extracellular calcium stimulation. Compared with corresponding extracellular calcium levels, PEMF stimulation increased proliferation and differentiation of osteoblasts and related gene expressions, such as insulin‐like growth factor 1 (IGF‐1), alkaline phosphatase (ALP), runt‐related transcript...
Source: Bioelectromagnetics - August 18, 2017 Category: Radiology Authors: Jie Tong, Lijun Sun, Bin Zhu, Yun Fan, Xingfeng Ma, Liyin Yu, Jianbao Zhang Tags: Research Article Source Type: research
Thermal mapping on male genital and skin tissues of laptop thermal sources and electromagnetic interaction
Since the development of communication devices and expansion of their applications, there have been concerns about their harmful health effects. The main aim of this study was to investigate laptop thermal effects caused by exposure to electromagnetic fields and thermal sources simultaneously; propose a nondestructive, replicable process that is less expensive than clinical measurements; and to study the effects of positioning any new device near the human body in steady state conditions to ensure safety by U.S. and European standard thresholds. A computer simulation was designed to obtain laptop heat flux from SolidWorks ...
Source: Bioelectromagnetics - August 11, 2017 Category: Radiology Authors: Mahdi Safari, Navid Mosleminiya, Ali Abdolali Tags: Research Article Source Type: research
Magnetosensitivity of bacteria E. coli: Magnetic isotope and magnetic field effects
The biological effects of a 25Mg nuclear spin and weak magnetic fields have been found and studied by using bacterial cells of Escherichia coli (E. coli) grown on standard M9 nutrient media with different isotopes of magnesium: 24Mg, 25Mg, 26Mg, and a natural mixture of Mg isotopes. Among these isotopes only 25Mg has a nuclear spin I = 5/2 and nuclear magnetic moment which have been known to affect enzymatic processes in vitro due to hyperfine interactions with uncoupled electrons of substrates. Other non‐magnetic magnesium isotopes, 24Mg and 26Mg, have neither a nuclear spin (I = 0) nor a nuclear magnetic moment...
Source: Bioelectromagnetics - August 7, 2017 Category: Radiology Authors: Ulyana G. Letuta, Vitaly L. Berdinskiy Tags: Research Article Source Type: research
Stable morphological –physiological and neural protein expression changes in rat bone marrow mesenchymal stem cells treated with electromagnetic field and nitric oxide
As an external physical factor, electromagnetic field (EMF) may influence cellular processes and nitric oxide (NO) by serving as a secondary messenger molecule in intracellular signaling cascades. Effects of these factors were evaluated simultaneously on viability, morphology, and variation of calcium ion content, and neural protein marker expression in rat bone marrow mesenchymal stem cells (BMSCs). The mesenchymal stem cells were isolated from rat bone marrow and cultured. Deta‐NO as a donor molecule of NO was added to cell culture medium after several passages. These cells were also exposed by retinoic acid (RA, a mol...
Source: Bioelectromagnetics - August 7, 2017 Category: Radiology Authors: Nazanin Haghighat, Parviz Abdolmaleki, Mehrdad Behmanesh, Mohammad Satari Tags: Research Article Source Type: research
Issue Information ‐ Page
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - August 4, 2017 Category: Radiology Tags: Issue Information ‐ Page Source Type: research
The 2016 Most Influential Bioelectromagnetics Journal Paper by Citation Award
(Source: Bioelectromagnetics)
Source: Bioelectromagnetics - July 24, 2017 Category: Radiology Authors: James C. Lin Tags: Editorial Source Type: research
Variation in the dielectric properties of freshly excised colorectal cancerous tissues at different tumor stages
The study was designed to identify differences in the dielectric properties of ex vivo colorectal cancerous tissues at different tumor stages. To date, 130 freshly excised colorectal cancerous specimens underwent measurement of both relative permittivity and conductivity on the serosal and mucosal surfaces of the carcinoma nidus, and the mucosa of the surgical resection margin ranging from 50 to 500 MHz at the Larmor frequencies. Tumor node metastasis staging was determined according to pathological reports for each patient. There were statistically significant differences in the relative permittivity of both colorectal ...
Source: Bioelectromagnetics - July 17, 2017 Category: Radiology Authors: Zhou Li, Weiwei Wang, Zhai Cai, Shuai Han, Shiming Lin, Linyun He, Miaoliang Chen, Dongyue Pan, Guanhua Deng, Song Duan, Sherman Xuegang Xin Tags: Research Article Source Type: research
Differential intensity ‐dependent effects of pulsed electromagnetic fields on RANKL‐induced osteoclast formation, apoptosis, and bone resorbing ability in RAW264.7 cells
This study not only enriches our basic knowledge for the regulation of PEMF in osteoclastogenesis, but also may lead to more efficient and scientific clinical application of PEMF in regulating bone turnover and inhibiting osteopenia/osteoporosis. Bioelectromagnetics. © 2017 Wiley Periodicals, Inc. (Source: Bioelectromagnetics)
Source: Bioelectromagnetics - July 1, 2017 Category: Radiology Authors: Pan Wang, Juan Liu, Yuefan Yang, Mingming Zhai, Xi Shao, Zedong Yan, Xuhui Zhang, Yan Wu, Lu Cao, Bingdong Sui, Erping Luo, Da Jing Tags: Research Article Source Type: research
