Determination of Biological Impedances

Schwan, Herman P.

doi:10.1016/b978-1-4831-6743-5.50013-7

Cited by 302 publications

(246 citation statements)

References 29 publications

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“…Dielectric measurements were made over a frequency range between 10 3 and 10 8 Hz using a Hewlett Packard LF4192A Impedance Analyzer. Raw data from biological samples usually include artifactual impedance at frequencies lower than 10 5 Hz due to electrode polarization [12]. This effect is more notable when the proteins are dissolved in high conductivity media.…”

Section: Introduction 2 Materials and Methodsmentioning

confidence: 99%

Electro-Optical Properties Characterization of Fish Type III Antifreeze Protein

2007

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Antifreeze proteins (AFPs) are ice-binding proteins that depress the freezing point of water in a non-colligative manner without a significant modification of the melting point. Found in the blood and tissues of some organisms (such as fish, insects, plants, and soil bacteria), AFPs play an important role in subzero temperature survival. Fish Type III AFP is present in members of the subclass Zoarcoidei. AFPIII are small 7-kDa-or 14-kDa tandem-globular proteins. In the present work, we study the behavior of several physical properties, such as the low-frequency dielectric permittivity spectrum, circular dichroism, and electrical conductivity of Fish Type III AFP solutions measured at different concentrations. The combination of the information obtained from these measurements could be explained through the formation of AFP molecular aggregates or, alternatively, by the existence of some other type of interparticle interactions. Thermal stability and electrooptical behavior, when proteins are dissolved in deuterated water, were also investigated.

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Section: Introduction 2 Materials and Methodsmentioning

confidence: 99%

Electro-Optical Properties Characterization of Fish Type III Antifreeze Protein

2007

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“…From Ref. (19). small fraction that is motionally restricted due to its proximity to protein surfaces (16).…”

Section: Figurementioning

confidence: 99%

Herman P. Schwan: A Scientist and Pioneer in Biomedical Engineering

Foster

2002

Annu. Rev. Biomed. Eng.

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“…This E value of the field strength is small in the membrane, due to the fact that the membrane gain at 13.56 MHz (carrier frequency of mEHT) is more than 100 [21,61]. In this consideration, the T I R ∆ = (19) where q R is the thermal resistance of the cylinder, which could be determined from the stationary electric and thermal analogy, as follows:…”

Section: In This Casementioning

confidence: 99%

“…The cellular membranes have further dielectric specialties in their parts in the nanoscopic range (Schwan effect [19]). The membranebound water has the upper part of the β-dispersion, denoted by δ [20,21], meaning that this part is highly selective for the various cell membrane states.…”

Section: Introductionmentioning

confidence: 99%

Nanoheating without Artificial Nanoparticles

Vincze

Andócs

et al. 2015

Biol Med (Aligarh)

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Our aim is to describe the physical and physiological effects of local modulated electro-hyperthermia (mEHT). The method concentrates on the energy absorption of cluster rafts of the plasma membrane. The targeted cluster contains transmembrane proteins, which can form coherent working voltage-gated ion channels and/or TRP receptors in one domain. This targeting is analogous to nanoparticle heating, except this uses readily available nanoparticles on the cell membrane instead of the artificially placed nano-object to induce selective energy absorption from the outside field. In the discussed non-artificial nanoparticle heating, selectivity is the consequence of the synergy of various interactions embedded into each other in their effective volume in macro-, micro-and nano-ranges.

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Determination of Biological Impedances

Cited by 302 publications

References 29 publications

Electro-Optical Properties Characterization of Fish Type III Antifreeze Protein

Electro-Optical Properties Characterization of Fish Type III Antifreeze Protein

Herman P. Schwan: A Scientist and Pioneer in Biomedical Engineering

Nanoheating without Artificial Nanoparticles

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