Cell membrane permeabilization of human erythrocytes by athermal 2450-MHz microwave radiation

Sajin, G.; Kovacs, E.; Moraru, R.; Savopol, Tudor; Sajin, M.

doi:10.1109/22.884197

Cited by 10 publications

(8 citation statements)

References 3 publications

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“…The athermal effects of microwaves on the membrane of human erythrocytes were studied by measuring hemoglobin loss at different microwave irradiation times and at different power densities. A significant increase of hemoglobin loss by exposed erythrocytes was observed due to microwaves 265. Microwave can also be used as promoting agents in inducing genetic changes in biosystem.…”

Section: Thermal Application Of Microwavesmentioning

confidence: 99%

Study of blend films from chitosan and hydroxypropyl guar gum

Xiao

Zhang

et al. 2003

J of Applied Polymer Sci

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ABSTRACT:In this study blend films of chitosan (CH) and hydroxypropyl guar gum (HGG) were prepared using a conventional solvent-casting technique and were dried at room temperature. Their miscibility and other properties were studied by Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, scanning electron microscopy, differential thermal analysis, ultraviolet analysis, and tensile strength tests. The physical and thermal properties of the films depended on the blending ratio. The maximum tensile strength and breaking elongation values achieved were 58.94 MPa and 17.25%, respectively, with a 60% content of HGG. Thermal stability also was improved, and the blend film containing 60% HGG had greater thermal stability than did the other blend and pure CH films. In addition, the best optical transparence was observed from 500 to 800 nm in the blend film containing 60% HGG. The results indicate that intermolecular interactions that resulted from hydrogen bonding between CH and HGG occurred in the blend films.

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Section: Thermal Application Of Microwavesmentioning

confidence: 99%

Study of blend films from chitosan and hydroxypropyl guar gum

Xiao

Zhang

et al. 2003

J of Applied Polymer Sci

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“…It was found that 2.45 GHz irradiation induces a significant hemoglobin loss due to transient permeabilisation of irradiated erythrocytes rather than to their lysis (Pologea-Moraru et al 1997). Sajin et al studied the effects of long-term exposure of human blood to 2.45 GHz irradiation at athermal power densities (CW, 60 h exposure (84 h kinetic measurements), 10 mW/cm 2 power flux density) (Sajin et al 2000). A significant increase of the hemoglobin loss by irradiated erythrocytes as well as a strong dependence of the rate of the increase of hemoglobin loss on the initial level of spontaneous hemolysis were revealed.…”

Section: Resultsmentioning

confidence: 96%

Effects of in vitro exposure to GSM900 electromagnetic field on human erythrocytes

et al. 2007

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“…The effects of long-term exposure of human blood to 2.45 GHz (continuous wave (CW), 60 h exposure, 84 h kinetic measurements, 10 mW/cm 2 power flux density) were studied in [ 29 ]. A significant increase in hemoglobin loss by irradiated erythrocytes was observed, as well as a strong dependence of the rate of the increase of hemoglobin loss on the initial level of the spontaneous hemolysis.…”

Section: Introductionmentioning

confidence: 99%

“…In most of these studies, erythrocyte suspensions were exposed to different types of incident fields (mostly far-field conditions) at one or multiple exposure levels which were significantly higher than those emitted by the wearable antennas. A portion of the conducted studies suffered from poor dosimetry [ 22 , 29 ]; for example, there was no information on the values of the SAR or SAR distribution in the suspension. Consequently, in order to understand the possible adverse human health effects of such electromagnetic fields, the mechanism of interaction between EMFs emitted by wearable antennas and the biological systems must be studied.…”

Section: Introductionmentioning

confidence: 99%

Wearable Antennas for Sensor Networks and IoT Applications: Evaluation of SAR and Biological Effects

Atanasov

Atanasova

Angelova

et al. 2022

Sensors

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In recent years, there has been a rapid development in the wearable industry. The growing number of wearables has led to the demand for new lightweight, flexible wearable antennas. In order to be applicable in IoT wearable devices, the antennas must meet certain electrical, mechanical, manufacturing, and safety requirements (e.g., specific absorption rate (SAR) below worldwide limits). However, the assessment of SAR does not provide information on the mechanisms of interaction between low-intensity electromagnetic fields emitted by wearable antennas and the human body. In this paper, we presented a detailed investigation of the SAR induced in erythrocyte suspensions from a fully textile wearable antenna at realistic (net input power 6.3 mW) and conservative (net input power 450 mW) conditions at 2.41 GHz, as well as results from in vitro experiments on the stability of human erythrocyte membranes at both exposure conditions. The detailed investigation showed that the 1 g average SARs were 0.5758 W/kg and 41.13 W/kg, respectively. Results from the in vitro experiments demonstrated that the short-term (20 min) irradiation of erythrocyte membranes in the reactive near-field of the wearable antenna at 6.3 mW input power had a stabilizing effect. Long-term exposure (120 min) had a destabilizing effect on the erythrocyte membrane.

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Cell membrane permeabilization of human erythrocytes by athermal 2450-MHz microwave radiation

Cited by 10 publications

References 3 publications

Study of blend films from chitosan and hydroxypropyl guar gum

Study of blend films from chitosan and hydroxypropyl guar gum

Effects of in vitro exposure to GSM900 electromagnetic field on human erythrocytes

Wearable Antennas for Sensor Networks and IoT Applications: Evaluation of SAR and Biological Effects

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