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Pick-up electrodes

PU electrode situated on an inactive skin site. The other electrode is then situated on an active skin site. This constitutes a monopolar system. If both electrodes are situated on an active skin site, no signal (potential difference) is measured. Function is independent of surface area (as are all PU electrodes), but small electrodes pick up more noise. Not CC, current density J = 0. Indifferent electrode shall be situated far from bioelectric sources. Examples ECG right leg, other extremities, Wilson terminal. EEG ear flip, nose. Electrodermal activity elbow. [Pg.227]

Martinsen and Grimnes used a three-electrode concentric ring system with the outer ring split in two parts, one used as reference electrode (R) and the other as current carrying (C) electrode. In this way, the reference electrode picks up a potential closer to that of the measuring electrode, so that deeper tissue series impedance contribution is reduced. [Pg.236]

Solutions are shielding, active opamp circuit clamping the body to ground (Chapter 8), increased distance to the noise source, increased common mode rejection circuitry (Chapter 8), averaging over several heart beats, and wireless telemetry of electrode pick-up signals. [Pg.416]

Titanium stabilised fillers should not be used in argon-arc welding as titanium will be vaporised and its effectiveness as a stabiliser lost. Carburising the weld seam by pick-up from surface contamination, electrode coatings or the arc atmosphere leads to increased tendency to intercrystalline corrosion. [Pg.95]

The interface between a liquid metal and an electrolyte solution can be vibrated by applying an oscillating external pressure variation. An electric signal picked up at the oscillating interface as a function of the applied electrode potential can be registered. It shows a particular dependency, at the signal vanishes [83Mly]. (Data obtained with this method are labelled VE). [Pg.186]

Initial resistance caused due to air-gap is very high to allow conduction of current. Hence, the arc is first initiated by narrowing its gap momentarily while 110-220 V DC is applied. Once the current picks up flow, the temperature across the arc-gap shoots up promptly. The electrodes are pulled apart leaving a gap of 20 mm to 1 cm, thereby establishing the electric arc whose temperature varies from 4000 to 8000° K. [Pg.362]

This long, thin cell is lowered into the centre of the EPR spectrometer, with the WE at the focus of the magnetic field. Great care and skill are needed during this operation because otherwise the signal will be distorted or, worse still, the EPR trace of the electrons within the electrodes may be picked up. [Pg.250]

Electrodic reactions that underlie the processes of metal deposition, etc., cannot be understood without knowing the potential difference at the electrode/solution interface and how it varies with distance from the electrode. The ions from the solution must be electrically energized to cross the interphase region and deposit on the metal. This electrical energy must be picked up from the field at the interface, which itself depends upon the double-layer structure. Thus, control over metal deposition processes can be improved by an increased understanding of double layers at metal/solutioii interfaces. [Pg.64]

In the case of a metal/solution interface, the charge on the metal is one of the signals that can be picked up. This electrode charge is mirrored on the solution side by an equal and opposite net charge constituted of separate contributions of the positive and negative charges, i.e., the relative concentrations of cations and anions in the interphase. However, are these ions on the metal or near the metal ... [Pg.125]

To use their nanotuhe nanotweezer, Kim and Lieher applied opposite electrical charges to the two gold electrodes (and, hence, to the two MWNTs). Since they carried opposite electrical charges, the two MWNTs were attracted to each other with a force that was proportional to the voltage applied to the electrodes. This force of attraction caused the ends of the two MWNTs to approach each other. The stronger the electrical potential applied, the closer the approach of the ends of the nanotweezers. Using this device, Kim and Lieher were able to pick up very small objects, such as polystyrene spheres with diameters of about 500 nm. [Pg.99]


See other pages where Pick-up electrodes is mentioned: [Pg.138]    [Pg.54]    [Pg.110]    [Pg.606]    [Pg.8]    [Pg.409]    [Pg.412]    [Pg.292]    [Pg.441]    [Pg.444]    [Pg.423]    [Pg.426]    [Pg.138]    [Pg.54]    [Pg.110]    [Pg.606]    [Pg.8]    [Pg.409]    [Pg.412]    [Pg.292]    [Pg.441]    [Pg.444]    [Pg.423]    [Pg.426]    [Pg.131]    [Pg.260]    [Pg.54]    [Pg.112]    [Pg.587]    [Pg.185]    [Pg.431]    [Pg.216]    [Pg.60]    [Pg.759]    [Pg.143]    [Pg.78]    [Pg.96]    [Pg.212]    [Pg.372]    [Pg.12]    [Pg.13]    [Pg.374]    [Pg.380]    [Pg.15]    [Pg.15]    [Pg.1213]    [Pg.27]    [Pg.646]    [Pg.80]    [Pg.80]    [Pg.23]    [Pg.40]    [Pg.41]   
See also in sourсe #XX -- [ Pg.147 , Pg.179 ]




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