An experimental method of bioimpedance measurement and analysis for discriminating tissues of fruit or vegetable

Roy, Arijit; Mallick, Abhishek; Das, Surajit; Aich, Abhijit

doi:10.3934/biophy.2020004

Cited by 7 publications

(5 citation statements)

References 21 publications

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“…To analyse the correspondence of the experimentally obtained results of the impedance change over time with the results obtained using mathematical models, formulas ( 12), ( 16), (17), and the substitution schemes shown in Figures 5a, 4a, 4b, 4c, we constructed graphs of the dependence R=f(t), which are shown in Figure 9. The input current is defined by the expression:…”

Section: Resultsmentioning

confidence: 99%

“…Papers [14; 15] investigated the effect of alternating current and alternating frequency from 10 to 44000 Hz on the change in biological tissue impedance using the frequencies of therapeutic intensities of drug penetration into cells. In these works [16][17][18], an electrical substitution circuit with a series connection of capacitance and active resistance was used to study the change in impedance under the action of alternating current. Using such a substitution scheme to study the effect of direct current on biological tissue would be incorrect.…”

Section: Introductionmentioning

confidence: 99%

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Justification of the electrical scheme of biological tissue replacementunder the action of DC voltage

Kryvonosov¹,

Prudnikova²,

Martyniuk³

2022

Tehnìka ta energetika

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The change in the impedance of biological tissue under the influence of voltage is used in the diagnosis and treatment of various diseases. Mathematical models describing physical and biological processes in biological objects are based on electrical substitution schemes. The subject of research of this work was the study of the change in the impedance of biological tissue in the transient process of ionization under the action of DC voltage. An analysis of the known substitution schemes was carried out, the shortcomings of their application were identified when the transient processes of ionization in the tissue under the action of direct current voltage were studied, and the substitution scheme with the introduction of additional resistance was substantiated, both analytically and experimentally. In the work, the bioimpedance method is applied when direct current voltage is applied to biological tissue, taking into account the law of commutation in transient ionization processes. An invasive measurement of the change in impedance with needle electrodes was carried out, and it was proved that the active component proportionally depends on the distance between the electrodes, while the capacitive component remains unchanged. It is shown that the ionization time constant is a criterion parameter and can be used in the diagnosis of the development of ischemic disease of muscle tissue, the change in the state of biological tissue when blood flow is stopped during the application of a tourniquet. It has been proven that the ionization time constant does not change with an unchanged ionic composition of the tissue and can be used in the analysis of the composition of the intercellular space. A simultaneous invasive measurement was performed in two identical places of different limbs, on one of which a hemostatic tourniquet was applied. The obtained results made it possible to conclude that a change in the constant time from 15% to 50% compared to two constant times allows for rapid diagnosis, within 2 minutes, of the state of biological tissue and can be used in the study of the development of diseases associated with ischemia. The results of the study can be used for rapid diagnosis of the state of a biological object and the creation of an inexpensive device for its use in surgery and research laboratories

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Justification of the electrical scheme of biological tissue replacementunder the action of DC voltage

Kryvonosov¹,

Prudnikova²,

Martyniuk³

2022

Tehnìka ta energetika

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“…2 depicts the general block diagram of the measuring instrument. The current source circuit is used to generate a sinusoidal current of amplitude in the range of 600 µA-800 µA and a frequency of 50 kHz [4]. The voltage sensing unit is used to amplify and remove the high frequency components from the signal sensed by voltage sensing electrodes.…”

Section: Proposed Methodsmentioning

confidence: 99%

“…The broad variability of Cole parameters makes it difficult to use bio-impedance to distinguish animal and plant tissues. [4] defines a novel electronic procedure for distinguishing fruit or vegetable tissue. This system uses a custom-built electrode pair to compute bio-impedance and Cole parameters covering a wide range of frequencies from 1 Hz to 1 MHz [4].…”

Section: Literature Surveymentioning

confidence: 99%

“…[4] defines a novel electronic procedure for distinguishing fruit or vegetable tissue. This system uses a custom-built electrode pair to compute bio-impedance and Cole parameters covering a wide range of frequencies from 1 Hz to 1 MHz [4]. However, impedance of human cell and tissue consists of resistive and capacitive components [5], [6].…”

Section: Literature Surveymentioning

confidence: 99%

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Design of Low Cost Bio-impedance Measuring Instrument

Birok¹,

Kapoor²

2022

IJACSA

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It is a well-established fact that the electrical bioimpedance of a part of the human body can provide valuable information regarding physiological parameters of the human body, if the signal is correctly detected and interpreted. Accordingly, an efficient low-cost bio-electrical impedance measuring instrument was developed, implemented, and tested in this study. Primarily, it is based upon the low-cost component-level approach so that it can be easily used by researchers and investigators in the specific domain. The measurement setup of instrument was tested on adult human subjects to obtain the impedance signal of the forearm which is under investigation in this case. However, depending on the illness or activity under examination, the instrument can be used on any other part of the body. The current injected by the instrument is within the safe limits and the gain of the biomedical instrumentation amplifier is highly reasonable. The technique is easy and user-friendly, and it does not necessitate any special training, therefore it can be effectively used to collect bio-impedance data and interpret the findings for medical diagnostics. Moreover, in this paper, several existing methods and associated approaches have been extensively explored, with in-depth coverage of their working principles, implementations, merits, and disadvantages, as well as focused on other technical aspects. Lastly, the paper also deliberates upon the present status, future challenges and scope of various other possible bio-impedance methods and techniques.

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Fractional order memcapacitive neuromorphic elements reproduce and predict neuronal function

Vazquez-Guerrero,

Tuladhar,

Psychalinos

et al. 2024

Sci Rep

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There is an increasing need to implement neuromorphic systems that are both energetically and computationally efficient. There is also great interest in using electric elements with memory, memelements, that can implement complex neuronal functions intrinsically. A feature not widely incorporated in neuromorphic systems is history-dependent action potential time adaptation which is widely seen in real cells. Previous theoretical work shows that power-law history dependent spike time adaptation, seen in several brain areas and species, can be modeled with fractional order differential equations. Here, we show that fractional order spiking neurons can be implemented using super-capacitors. The super-capacitors have fractional order derivative and memcapacitive properties. We implemented two circuits, a leaky integrate and fire and a Hodgkin–Huxley. Both circuits show power-law spiking time adaptation and optimal coding properties. The spiking dynamics reproduced previously published computer simulations. However, the fractional order Hodgkin–Huxley circuit showed novel dynamics consistent with criticality. We compared the responses of this circuit to recordings from neurons in the weakly-electric fish that have previously been shown to perform fractional order differentiation of their sensory input. The criticality seen in the circuit was confirmed in spontaneous recordings in the live fish. Furthermore, the circuit also predicted long-lasting stimulation that was also corroborated experimentally. Our work shows that fractional order memcapacitors provide intrinsic memory dependence that could allow implementation of computationally efficient neuromorphic devices. Memcapacitors are static elements that consume less energy than the most widely studied memristors, thus allowing the realization of energetically efficient neuromorphic devices.

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An experimental method of bioimpedance measurement and analysis for discriminating tissues of fruit or vegetable

Cited by 7 publications

References 21 publications

Justification of the electrical scheme of biological tissue replacementunder the action of DC voltage

Justification of the electrical scheme of biological tissue replacementunder the action of DC voltage

Design of Low Cost Bio-impedance Measuring Instrument

Fractional order memcapacitive neuromorphic elements reproduce and predict neuronal function

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