Dielectric relaxation of a protein–water system in atherosclerotic artery wall

Brzeziński, J; Oszkinis, Grzegorz; Marzec, E.

doi:10.1007/s11517-007-0181-2

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…2 and 3(a and b) show the effect of frequency on the dielectric behavior of the diabetic and the healthy nail previously kept at 120 and 200°C, respectively. For the air-dried nail (not presented) the frequency only affects the amplitude but not the temperature of the e 0 and e 00 peaks, similarly as for wet horn [20] and other tissues [16,21]. The peaks in e 00 of the b-relaxation for both samples are shifted to lower temperatures as the frequency decreases.…”

Section: Methodsmentioning

confidence: 82%

Dielectric properties of keratin–water system in diabetic and healthy human fingernails

Jabłecka

Olszewski

Marzec

2009

Journal of Non-Crystalline Solids

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Section: Methodsmentioning

confidence: 82%

Dielectric properties of keratin–water system in diabetic and healthy human fingernails

Jabłecka

Olszewski

Marzec

2009

Journal of Non-Crystalline Solids

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“…Organ physical damage (e.g., cell deformation) can be seen based on a decrease in the value of the dielectric constant [33,34]. The dielectric constant can be used to indicate the nature or characteristics of a material.…”

Section: Discussionmentioning

confidence: 99%

Correlation Between Exposure to Transfluthrin and the Change in Dielectric Properties and Deformed Cells of Mice

Juswono¹,

Wardoyo²,

Widodo³

et al. 2020

Pol. J. Environ. Stud.

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Transflutrhin is a single isomer compound that is contained in mosquito repellent. The volatility of this chemical compound made it suited for applications that evaporate this active ingredient like space spray using one push mosquito repellent. As an aerosol, transfluthrin can trigger oxidative stress that causes cell damage. Cell damage can be identified microscopically or by analyzing the electrical characteristics of the cell. Cell damage due to the content of chemical compounds in the pollutants that enter the body will affect the electrical properties of the cell itself. One of the bio-electric variables in organ tissues that can be analyzed and used to determine the level of tissue damage is a change in the dielectric constant value of an organ. The measurement of the dielectric constant is done by using two conductor plates in which the dielectric material is inserted in the middle of the plates, and the capacitance value will be measured. The results show that a higher level of damage to the organ caused a lower dielectric constant value. This decrease was caused by the changes in the polarization properties of the damaged tissue. Factors that affected the polarization of material were large electric dipole moments and large numbers of healthy and damaged cells. Organ damage was determined based on the decrease in the value of dielectric constant. Histological studies revealed severe cell damages evidenced by the deformed cell compared to the unexposed mice. Type-A mosquito repellents with transfluthrin active ingredients of 25% caused 74% at lung cell damage, 71% of blood damage, 47% of kidney cell damage, and 40% of liver cell damage, with dielectric organ constants 0.65x10 5 to 2.62x10 5. In the mice exposed to type-B mosquito repellent (21.3% of transfluthrin), the damage levels were 72%, 72%, 49%, and 36%, respectively, for lung, blood, kidney, and liver cells. The dielectric constants were 0.91x10 5 to 2.62x10 5. Our studies indicate that mosquito repellent aerosol does initiate physical damage

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“…Although the predictive role of inflammatory markers in advanced coronary artery disease has been proven [19,20], the pathophysiological basis of the relationship between inflammatory activation and coronary atherosclerosis has not been investigated. Brzezinski et al suggested physicochemical changes measured by dielectric spectroscopy in collagen in comparison to elastin related to peripheral artery disease [21].…”

Section: Introductionmentioning

confidence: 99%

Coronary Artery Disease and Inflammatory Activation Interfere with Peripheral Tissue Electrical Impedance Spectroscopy Characteristics—Initial Report

Urbanowicz

Michalak

Marzec

et al. 2023

IJERPH

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Background: The electrical properties of cells and tissues in relation to energy exposure have been investigated, presenting their resistance and capacitance characteristics. The dielectric response to radiofrequency fields exhibits polarization heterogeneity under pathological conditions. The aim of the study was to analyze the differences in changes in resistance and capacitance measurements in the range from 1 kHz to 1 MHz, combined with an assessment of the correlation between the results of electrical impedance spectroscopy (EIS) and inflammatory activation. Methods: In the prospective study, EIS was performed on the non-dominant arm in 29 male patients (median (Q1–Q3) age of 69 (65–72)) with complex coronary artery disease and 10 male patients (median (Q1–Q3) age of 66 (62–69)) of the control group. Blood samples were collected for inflammatory index analysis. Results: The logistic regression analysis revealed a negative correlation with inflammatory indexes, including neutrophil to lymphocyte ratio (NLR) in the CAD group in the frequency of 30 kHz (p = 0.038, r = −0.317) regarding EIS resistance measurements and a positive correlation in CAD group in the frequency of 10 kHz (p = 0.029, r = −0.354) regarding EIS capacitance. Conclusions: The bioelectric characteristics of peripheral tissues measured by resistance and capacitance in EIS differ in patients with coronary artery disease and in the control group. Electrical impedance spectroscopy reveals a statistically significant correlation with inflammatory markers in patients with CAD.

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Dielectric relaxation of a protein–water system in atherosclerotic artery wall

Cited by 8 publications

References 19 publications

Dielectric properties of keratin–water system in diabetic and healthy human fingernails

Dielectric properties of keratin–water system in diabetic and healthy human fingernails

Correlation Between Exposure to Transfluthrin and the Change in Dielectric Properties and Deformed Cells of Mice

Coronary Artery Disease and Inflammatory Activation Interfere with Peripheral Tissue Electrical Impedance Spectroscopy Characteristics—Initial Report

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