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  1. Medical and Biological Engineering and Computing
  2. Medical and Biological Engineering and Computing : Volume 35
  3. Medical and Biological Engineering and Computing : Volume 35, Issue 4, July 1997
  4. Impedance of a goat eye lens
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Medical and Biological Engineering and Computing : Volume 55
Medical and Biological Engineering and Computing : Volume 54
Medical and Biological Engineering and Computing : Volume 53
Medical and Biological Engineering and Computing : Volume 52
Medical and Biological Engineering and Computing : Volume 51
Medical and Biological Engineering and Computing : Volume 50
Medical and Biological Engineering and Computing : Volume 49
Medical and Biological Engineering and Computing : Volume 48
Medical and Biological Engineering and Computing : Volume 47
Medical and Biological Engineering and Computing : Volume 46
Medical and Biological Engineering and Computing : Volume 45
Medical and Biological Engineering and Computing : Volume 44
Medical and Biological Engineering and Computing : Volume 43
Medical and Biological Engineering and Computing : Volume 42
Medical and Biological Engineering and Computing : Volume 41
Medical and Biological Engineering and Computing : Volume 40
Medical and Biological Engineering and Computing : Volume 39
Medical and Biological Engineering and Computing : Volume 38
Medical and Biological Engineering and Computing : Volume 37
Medical and Biological Engineering and Computing : Volume 36
Medical and Biological Engineering and Computing : Volume 35
Medical and Biological Engineering and Computing : Volume 35, Issue 6, November 1997
Medical and Biological Engineering and Computing : Volume 35, Issue 5, September 1997
Medical and Biological Engineering and Computing : Volume 35, Issue 4, July 1997
Ventricular defibrillating threshold: strength-duration and percent-success curves
Time-frequency analysis of the first heart sound. Part 1: Simulation and analysis
Time-frequency analysis of the first heart sound. Part 2: An appropriate time-frequency representation technique
New technique for time series analysis combining the maximum entropy method and non-linear least squares method: its value in heart rate variability analysis
Non-invasive determination of instantaneous heart rate in developing avian embryos by means of acoustocardiogram
Fluctuations in the cerebral oxygenation state during the resting period in functional mapping studies of the human brain
Measurement of venous oxyhaemoglobin saturation in the adult human forearm by near infrared spectroscopy with venous occlusion
Removal of catheter distortion in multiple indicator dilution studies: a deconvolution-based method and case studies on glucose blood-tissue exchange
Estimation of habituation and signal-to-noise ratio of cortical evoked potentials to oesophageal electrical and mechanical stimulation
Impedance of a goat eye lens
Spike detection in biomedical signals using midprediction filter
Acoustical recognition of laryngeal pathology using the fundamental frequency and the first three formants of vowels
In vitro 3D reconstruction of long bones using B-scan image processing
Computerised multiparametric analysis from images of blood flow through frog mesenteric arterial bifurcation
Effect of ankle-foot orthosis on active ankle moment in patients with hemiparesis
Technology assessment using the association between outcome measures and patterns of illness severity
Clinical assessment of Hokkaido University PACS
Design of a summary screen for an ICU patient data management system
Biopotential amplifier for simultaneous operation with biomagnetic instruments
Management of dental trauma: development of a 2D data acquisition system to evaluate passivity of dental splints
Information in full and reduced data sets of electrical impedance spectra from various skin conditions, compared using a holographic neural network
Optimisation algorithms for ECG data compression
Optical assessment of recovery of tissue blood supply after removal of externally applied pressure
Hopfield network applied to blood vessel detection in angiograms
Ballistocardiogram of avian eggs determined by an electromagnetic induction coil
Electromagnetic compatibility aspects of active robotic systems for surgery: the robotic prostatectomy experience
Precision LED-based stimulator for focal electroretinography
Influence of ionic shifts during dialysis on volume estimations with multifrequency impedance analysis
Medical and Biological Engineering and Computing : Volume 35, Issue 3, May 1997
Medical and Biological Engineering and Computing : Volume 35, Issue 2, March 1997
Medical and Biological Engineering and Computing : Volume 35, Issue 1, January 1997

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Impedance of a goat eye lens

Content Provider SpringerLink
Author Kohli, K. S. Rai, D. V. Kumar, P. Jindal, V. K. Goyal, N.
Copyright Year 1997
Abstract The complex electrical impedance of a goat eye lens is studied in the frequency range 10mHz−10Hz at room temperature, using a computer-controlled AC impedance system. AC impedance software (model 368, version 2.2) is employed to determine the total impedance and capacitance of the eye lens at various frequencies. A Cole-Cole plot of the eye lens material is drawn between the real component of impedance Z′ and the imaginary component Z″ for each excitation frequency that shows a perfect arc of a semicircle, with its centre lying below the abscissa at an angle of 35°. The half-angle ϕ between R$_{0}$ and R$_{∞}$ is found to be 55°, which mathematically demonstrates the selective permeability of the eye lens. Using graphical analysis of the Cole-Cole plot, characteristic frequency f$_{c}$ and distribution factor α are observed to be 1Hz and 0.77, respectively. At characteristic frequency, capacitance and total impedance are found to be 1.14μF and 9.08kΩ. The effect of electrode polarisation on capacitance is corrected, based on Fricke's power function. The observed electrical parameters are then used to explain the multiple current path through various tissue compartments. Further, an attempt is made to explain the results on the basis of a possible dipolar model.
Starting Page 348
Ending Page 353
Page Count 6
File Format PDF
ISSN 01400118
Journal Medical and Biological Engineering and Computing
Volume Number 35
Issue Number 4
e-ISSN 17410444
Language English
Publisher Kluwer Academic Publishers
Publisher Date 1997-01-01
Publisher Place Dordrecht
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Lens Cole-Cole plot Complex impedance Dielectric constant Electrode polarisation Dipolar model Human Physiology Neurosciences Imaging Radiology Computer Applications Biomedical Engineering
Content Type Text
Resource Type Article
Subject Biomedical Engineering Computer Science Applications
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