Dielectric Spectroscopy of Dry and Wet Soils in Frequency Region from 20 Hz to 20 GHz

Gadani, Deepak H.; Vyas, Anil; Rana, V. A.; Bhatnagar, S. P.; Prajapati, A.N.

doi:10.4028/www.scientific.net/ssp.209.23

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…To validate the accuracy of electrical conductivity measurements, electrical conductivity of NaCl solutions was first investigated at various molar concentrations ranging from 0.5 to 500 mM (supplementary information, Table S2 ). The measured values agreed with reported data for conductivity of salt water with different salinity (Culkin, 1986 ; Schmidt et al, 2018 ; Gadani et al, 2012 ; Peyman et al, 2007 ; Lewis, 1980 ). Distilled water with a measured electrical conductivity of 0.01 mS.cm −1 , in agreement with literature values (<0.02 mS.cm −1, 25°C) (Ageev & Rybin, 2020 ; Golnabi et al, 2009 ), was also considered as a control solution.…”

Section: Resultssupporting

confidence: 90%

Critical considerations in determining the surface charge of small extracellular vesicles

Tamrin,

Phelps,

Nezhad

et al. 2023

J of Extracellular Vesicle

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Small extracellular vesicles (EVs) have emerged as a focal point of EV research due to their significant role in a wide range of physiological and pathological processes within living systems. However, uncertainties about the nature of these vesicles have added considerable complexity to the already difficult task of developing EV‐based diagnostics and therapeutics. Whereas small EVs have been shown to be negatively charged, their surface charge has not yet been properly quantified. This gap in knowledge has made it challenging to fully understand the nature of these particles and the way they interact with one another, and with other biological structures like cells. Most published studies have evaluated EV charge by focusing on zeta potential calculated using classical theoretical approaches. However, these approaches tend to underestimate zeta potential at the nanoscale. Moreover, zeta potential alone cannot provide a complete picture of the electrical properties of small EVs since it ignores the effect of ions that bind tightly to the surface of these particles. The absence of validated methods to accurately estimate the actual surface charge (electrical valence) and determine the zeta potential of EVs is a significant knowledge gap, as it limits the development of effective label‐free methods for EV isolation and detection. In this study, for the first time, we show how the electrical charge of small EVs can be more accurately determined by accounting for the impact of tightly bound ions. This was accomplished by measuring the electrophoretic mobility of EVs, and then analytically correlating the measured values to their charge in the form of zeta potential and electrical valence. In contrast to the currently used theoretical expressions, the employed analytical method in this study enabled a more accurate estimation of EV surface charge, which will facilitate the development of EV‐based diagnostic and therapeutic applications.

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Section: Resultssupporting

confidence: 90%

Critical considerations in determining the surface charge of small extracellular vesicles

Tamrin,

Phelps,

Nezhad

et al. 2023

J of Extracellular Vesicle

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“…Both 𝜀 ′ and 𝜀 ′′ increased with moisture content but decreased with frequency. Similar results were reported by Gadani et al (37)(38) for moist and fertilized soil of Gandinagar and Palanpur district as a function of frequency. Ahire and Chaudhari (39) reported an increase in 𝜀 ′ and 𝜀 ′′ as a function of moisture content at 5.3 GHz for soils of Navsari district.…”

Section: Ecs Transactions 107 (1) 6413-6425 (2022)supporting

confidence: 90%

Dielectric Properties of Soils of India at Radio and Microwave Frequencies: A Review

Palta¹,

Pankaj²,

Kaur³

et al. 2022

ECS Trans.

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Dielectric properties of soils are important in the field of geophysical exploration, agriculture, and remote sensing, as these directly affect the performance of electromagnetic sensors. Soils vary from region to region due to variation in texture, temperature, demography, and environment, so area wise dielectric properties of soil differ significantly and depend upon frequency, moisture content, bulk density, and salinity. India has a wide variety of soils and numerous researchers have studied dielectric properties of many states of India. However, due to difference in technique used, frequency of interest, and soil type, it is difficult to generalize dielectric behavior of soils of India as a whole. In this review, we present a systematic state wise analysis of all reported dielectric data on soils of India at radio and microwave frequencies.

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An open-ended probe with an antenna for the measurement of the water content in the soil

Woszczyk

Szerement

Lewandowski

et al. 2019

Computers and Electronics in Agriculture

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Dielectric Spectroscopy of Dry and Wet Soils in Frequency Region from 20 Hz to 20 GHz

Cited by 7 publications

References 5 publications

Critical considerations in determining the surface charge of small extracellular vesicles

Critical considerations in determining the surface charge of small extracellular vesicles

Dielectric Properties of Soils of India at Radio and Microwave Frequencies: A Review

An open-ended probe with an antenna for the measurement of the water content in the soil

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