Dielectric properties of processed cheese

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chin Han Chan ◽  
Jean-Marc Saiter ◽  
Hubert Eudier ◽  
Hans-Werner Kammer
Keyword(s):  
Dielectric Properties ◽  
Impedance Spectroscopy ◽  
Frequency Domain ◽  
Food Quality ◽  
Low Frequency ◽  
Relaxation Behavior ◽  
Impedance Spectra ◽  
Processed Cheese ◽  
Dynamic Studies

Abstract Dynamic studies of several processed cheeses were carried out for evaluation of their dielectric properties and their relaxation behavior. Impedance spectroscopy has been used to study the systems under discussion in low-frequency domain. A substantial number of impedance spectra will be given and discussed that relate the dielectric properties to food nutrients. Also influence of moisture on food quality might be evaluated.

Influence of Lanthanum Concentration on Properties of BLT Electroceramics

2012 ◽  
Vol 512-515 ◽  
pp. 1308-1312 ◽  
Author(s):  
Beata Wodecka-Duś ◽  
Agata Lisińska-Czekaj ◽  
Dionizy Czekaj
Keyword(s):  
Dielectric Properties ◽  
Electrical Properties ◽  
Impedance Spectroscopy ◽  
Frequency Domain ◽  
Room Temperature ◽  
Ferroelectric Properties ◽  
Lcr Meter ◽  
La Doped

Results of fabrication and study of Ba1-xLaxTi1-x/4O3(BLT) ceramics for x within the range 0.001≤x≤0.004 is reported in the present paper. BLT ceramics has a structure based on ABO3–type perovskite, and its properties strongly depend on the chemical comSubscript textposition. The interrelated semiconductor and ferroelectric properties of La-doped BaTiO3ceramics were considered for describing its electrical properties. Dielectric properties were studied in frequency domain by impedance spectroscopy with a Quadtech 1920-type precision LCR meter at room temperature T=RT.

Electrical/Dielectric Properties of Nanocrystalline Cerium Oxide

1996 ◽  
Vol 457 ◽  
Author(s):  
Jin-Ha Hwang ◽  
Thomas O. Mason ◽  
Edward J. Garboczi
Keyword(s):  
Dielectric Properties ◽  
Impedance Spectroscopy ◽  
Grain Boundary ◽  
Transport Properties ◽  
Cerium Oxide ◽  
High Resistance ◽  
Current Flow ◽  
Impedance Spectra ◽  
Electrode Interface ◽  
Microcrystalline Material

ABSTRACTElectrical/dielectric properties of nanocrystalline cerium oxide have been studied using impedance spectroscopy, thermopower, and DC 4-point conductivity. The combined techniques identified the effect of poor electroding on impedance spectra. Incomplete contact between the specimen and the electrode induces an additional arc in the impedance spectra. The additional high resistance feature results from the geometric constriction of current flow at the specimen/electrode interface and can be misinterpreted as a grain boundary response. The defect chemistry, nonstoichiometry, and transport properties were investigated in nanoscale ceria and compared with those of microcrystalline material.

Dielectric Properties in Fresh Trabecular Bone Tissue from 1MHz to 1000MHz: A Fast and Non Destructive Quality Evaluation Technique

2010 ◽  
Vol 638-642 ◽  
pp. 730-735 ◽  
Author(s):  
Ramiro M. Irastorza ◽  
Sergio Valente ◽  
Fernando Vericat ◽  
Eugenia Blangino
Keyword(s):  
Dielectric Properties ◽  
Frequency Domain ◽  
Quality Evaluation ◽  
Low Cost ◽  
Low Frequency ◽  
Electrical Impedance Spectroscopy ◽  
Sample Population ◽  
Strongly Correlated ◽  
Trabecular Bones ◽  
Non Destructive

The increasing research on development of novel bio-materials has resulted in several studies on non-destructive evaluation methods for characterizing these materials and the biological materials receiving them. A broad range of techniques are available. As an alternative tool, electrical impedance spectroscopy, has become a widely used, non destructive and low cost technique in material quality evaluation. Particularly in bones, it has also been demonstrated that mechanical characteristics are strongly correlated to dielectric properties. In this work, non destructive estimation (the same samples can be tested using other techniques) of the dielectric properties of fresh trabecular bones (layered lossy structure) using coaxial probes is analyzed from 1MHz to 10MHz (in frequency domain) and from 80MHz to 1GHz (in both, frequency and time domain). Frequency domain system identification is used to build the estimation in the low frequency range and an orthonormal based identification approach, for the high frequency data. Comments on conductive samples, non Debye dielectrics and polarization effects are added. The methodology was applied to a particular human sample population of aged adult femur heads and results are presented here. A comparison with destructive test, in which the samples were machined into cylinders of 7mm diameter, is also performed.

Relaxation Behavior of Zr Substituted CaCu3Ti4O12 Ceramics

2011 ◽  
Vol 687 ◽  
pp. 375-379 ◽  
Author(s):  
Hong Tao Yu ◽  
Wen Bo Zhang ◽  
Jing Song Liu ◽  
Han Xing Liu
Keyword(s):  
Grain Size ◽  
Relaxation Time ◽  
Dielectric Properties ◽  
Grain Boundary ◽  
Dielectric Response ◽  
Relaxation Behavior ◽  
Impedance Spectra ◽  
Boundary Concentration ◽  
Giant Dielectric ◽  
Boundary Relaxation

The dielectric properties of Zr substituted CaCu3Ti4O12ceramics have been investigated in detail. Grain size decreases with Zr content increasing. The hetero-electrical microstructures of prepared samples have been confirmed by the impedance spectra. The dielectric loss has been improved by Zr doping because of the enhancement of grain boundary resistivity. A Debye-like boundary relaxation behavior has been observed in the temperature range of 220-600K. As Zr content increases, the relaxation time increases due to the higher grain boundary concentration. This work has provided an additional proof for the origin of giant dielectric response in CaCu3Ti4O12ceramics.

Local Electrochemical Impedance Spectroscopy: Towards an Improvement in the Low Frequency Domain

2020 ◽  
Vol MA2020-02 (20) ◽  
pp. 1570-1570
Author(s):  
Maurilio Pereira Gomes ◽  
Isolda Costa ◽  
Nadine Pebere ◽  
Jesualdo Luis Rossi ◽  
Mireille Turmine ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Frequency Domain ◽  
Electrochemical Impedance ◽  
Low Frequency ◽  
Local Electrochemical Impedance Spectroscopy

scholarly journals Feasibility of Bioelectrical Impedance Spectroscopy Measurement before and after Thoracentesis

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Matthias Daniel Zink ◽  
Sören Weyer ◽  
Karolin Pauly ◽  
Andreas Napp ◽  
Michael Dreher ◽  
...  
Keyword(s):  
Pleural Effusion ◽  
Impedance Spectroscopy ◽  
Frequency Domain ◽  
Healthy Subjects ◽  
Low Frequency ◽  
Bioelectrical Impedance ◽  
Impedance Change ◽  
Before And After ◽  
The Mean ◽  
Single Time Point

Background.Bioelectrical impedance spectroscopy is applied to measure changes in tissue composition. The aim of this study was to evaluate its feasibility in measuring the fluid shift after thoracentesis in patients with pleural effusion.Methods.45 participants (21 with pleural effusion and 24 healthy subjects) were included. Bioelectrical impedance was analyzed for “Transthoracic,” “Foot to Foot,” “Foot to Hand,” and “Hand to Hand” vectors in low and high frequency domain before and after thoracentesis. Healthy subjects were measured at a single time point.Results.The mean volume of removed pleural effusion was1169±513 mL. The “Foot to Foot,” “Hand to Hand,” and “Foot to Hand” vector indicated a trend for increased bioelectrical impedance after thoracentesis. Values for the low frequency domain in the “Transthoracic” vector increased significantly (P<0.001). A moderate correlation was observed between the amount of removed fluid and impedance change in the low frequency domain using the “Foot to Hand” vector (r=-0.7).Conclusion.Bioelectrical impedance changes in correlation with the thoracic fluid level. It was feasible to monitor significant fluid shifts and loss after thoracentesis in the “Transthoracic” vector by means of bioelectrical impedance spectroscopy. The trial is registered with Registration Numbers IRB EK206/11 andNCT01778270.

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