Improving capacitance measurements of aqueous solutions with alpha and beta corrections in a parallel-plate capacitor system: Insights into dielectric properties

Zada, Muhammad; Basir, Abdul; Lee, Byunghun; Yoo, Hyoungsuk

doi:10.1016/j.jfoodeng.2023.111798

Cited by 5 publications

(2 citation statements)

References 30 publications

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“…Microwaves are more effective in heating water since water exhibits the maximum microwave absorption at 18 GHz . On the other hand, the radiofrequency ranges from 3 MHz to 300 MH, and it promotes the ionic conduction of charged particles by the conduction losses . Therefore, radiofrequency is more suitable for selectively heating ionic components.…”

Section: Introductionmentioning

confidence: 99%

“… 21 On the other hand, the radiofrequency ranges from 3 MHz to 300 MH, and it promotes the ionic conduction of charged particles by the conduction losses. 22 Therefore, radiofrequency is more suitable for selectively heating ionic components. Dielectric heating is widely used in various food industry processes such as cooking, thawing, drying, sterilization, and extraction.…”

Section: Introductionmentioning

confidence: 99%

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Accelerating Sulfated Polysaccharides Extraction from Fast-Growing Ulva Green Seaweed by Frequency-Controlled Microwaves

Matsuzaki,

Tatsumi,

Sugiyama

et al. 2024

ACS Omega

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Ulva sp. is a type of green algae and is widely distributed in coastal areas around the world due to eutrophication. Effective utilization of Ulva sp. is expected for the establishment of carbon-neutral biochemical production. Microwave-assisted hydrothermal extraction is one of the most efficient ways of extracting highly functional polysaccharides called ulvan. Here, we demonstrate the importance of microwave frequency in enhancing ulvan extraction from Ulva meridionalis. We found that microwaves (2.45 GHz) selectively heat water solvent, while radio frequency (200 MHz) selectively heats ionic ulvan. Moreover, 2.45 GHz was more effective for extracting ulvan than 200 MHz. Then, we analyzed the conformational change in ulvan during microwave irradiation using in situ small-angle X-ray scattering. Microwaves initiated the loosening of ulvan bundles at temperatures lower than those of conventional heating. As a result, microwaves at 2.45 GHz selectively heat water and initiate ulvan structural change to enhance the extraction of ulvan from U. meridionalis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accelerating Sulfated Polysaccharides Extraction from Fast-Growing Ulva Green Seaweed by Frequency-Controlled Microwaves

Matsuzaki,

Tatsumi,

Sugiyama

et al. 2024

ACS Omega

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Mechanism model for effect of eccentricity on capacitive control rod position indicators

Li,

Qin,

Chen

et al. 2024

Nuclear Engineering and Design

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A numerical simulation of a novel self-powered implantable respiration sensor based on a triboelectric nanogenerator for medical applications

Mozaffari,

Nateghi

2024

Phys. Scr.

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The breathing rate is utilized as a reliable indicator in many cases to predict and diagnose respiratory diseases as well as the respiratory dysfunction caused by diseases such as the cystic fibrosis. Therefore, in this study, a self-powered implantable respiration sensor based on a contact-separation mode triboelectric nanogenerator (TENG) was designed to monitor the respiratory rates by sensing the variation of the diaphragm muscle. For this purpose, a polytetrafluoroethylene film with a thickness of 160 μm and a nylon film with a thickness of 180 μm are employed as the negative and positive triboelectric materials. Two copper layer each with a thickness of 100 μm are placed on the outer surfaces of the triboelectric layers as the conducting electrodes. In order to uniformly deform the moving plate of the TENG, it is rigidly attached to the center of the diaphragm through a silicon mechanical coupling element with dimensions of 80 x 80 μm2. The pressure caused by breathing on the diaphragm muscle, which is in the range of 266-666 Pa, is applied to the center of the device diaphragm. The effect of various parameters including external pressure, frequency and surface charge density on the output performance of the device is also investigated. It is evident that higher external pressure results in intensive deformations of the moving plate of the TENG, leading to a more significant energy conversion efficiency of the device. Similarly, increasing the surface charge density causes an increase in all electrical output parameters. Moreover, the device achieves an output power of 0.209 nW at a load resistance of 20 GΩ by applying a pressure of 666 Pa at a frequency of 0.24 Hz. All the results demonstrate the potential of the new proposed sensor for detecting and monitoring real-time respiratory rates with high sensitivity and clinical applications.

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Improving capacitance measurements of aqueous solutions with alpha and beta corrections in a parallel-plate capacitor system: Insights into dielectric properties

Cited by 5 publications

References 30 publications

Accelerating Sulfated Polysaccharides Extraction from Fast-Growing Ulva Green Seaweed by Frequency-Controlled Microwaves

Accelerating Sulfated Polysaccharides Extraction from Fast-Growing Ulva Green Seaweed by Frequency-Controlled Microwaves

Mechanism model for effect of eccentricity on capacitive control rod position indicators

A numerical simulation of a novel self-powered implantable respiration sensor based on a triboelectric nanogenerator for medical applications

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