Compensating circuits for rectifier cells

Campbell, Norman R.; Freeth, M K

doi:10.1088/0950-7671/11/4/409

Cited by 26 publications

(4 citation statements)

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“…The temperature dependence of is a consequence of the increasing mean free path of the electrons with respect to phonon scattering at lower temperatures. The absolute values of are in good agreement with other experiments [4,11].…”

Section: Resultssupporting

confidence: 91%

The radiation entrance window of pn junction detectors

et al. 1995

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The performance of high-resolution, fully depleted silicon detectors at low photon energies has been found to be dominated by incomplete charge collection due to the pn junction entrance window. Two alternative experimental methods to characterize this behaviour have been investigated by using monochromatized synchrotron radiation at the radiometry laboratory of the Physikalisch-Technische Bundesanstalt with the electron storage ring BESSY: the measurement of the dc photocurrent relative to a calibrated diode and the measurement of the energydispersive response function in the single photon counting mode. Both methods are discussed and compared with a theoretical model including a microscopic description of the photoelectric absorption and a charge-collection probability function.

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Section: Resultssupporting

confidence: 91%

The radiation entrance window of pn junction detectors

et al. 1995

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“…It has a sensitivity of about 4.4 microamperes per foot candle to white light and its response is very nearly linear, especially when there is close to zero potential difference across it. This may be accomplished by using the circuit (2,13) shown in the lower left of figure 4. To take a reading switch Si is closed and the ammeter G is read.…”

Section: Apparatusmentioning

confidence: 99%

“…Similar measurements using fraction 12 and the unfractionated polymer dissolved in dioxane showed that the variation of molecular weight with temperature existed in other fractions and in the unfractionated polymer. The molecular weights are summarized in table 2.…”

mentioning

confidence: 99%

The Association of Polymer Molecules in Dilute Solution.

Doty¹,

Wagner²,

Singer³

1947

J. Phys. Chem.

136

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The belief has developed that polymer molecules, in dilute solution a t least, are always molecularly dispersed, because of the lack of refuting evidence and the attractive simplicity of the assumption. I t is the purpose of this paper, however, to show that stable association of polymer molecules in solution exists under certain conditions. The work is essentially divided into two parts: in the first part the association of polyvinyl chloride in different solvent media is studied in detail by several different methods; in the second part there are described much less detailed experiments, mostly concerned with demonstrating that the stable association of polymer molecules is a general phenomenon when the system is near the point of phase separation.Wisconsin, May 28-29, 1946. England.' Presented a t the Twentieth National Colloid Symposium, which was he Id a t Madison,

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“…The potassium concentration in the tissue residue was determined in the usual way by comparison with appropriate standards using the EEL (Evans Electroselenium) flame photometer. Two modifications were made when analysing the perfusion fluids used for the potassium flux determination: (a) since the sodium concentration of the perfusate was high and contributed to the reading of the instrument the potassium standards were made up to contain sodium at the same concentration as the perfusate after appropriate dilution; (b) the photometer was modified by incorporation of a compensating circuit for photovoltaic cells, similar to that described by Campbell & Frith (1934). This method in which photocurrent is measured by application of a 'short-circuiting' current of known strength across the output of the photocell has the advantage of (a) reducing non-linearities in the performance of the photocell and (b) permitting the photometer to be used at a high sensitivity, the galvanometer in this case serving as a zero-instrument.…”

Section: Introductionmentioning

confidence: 99%

Intracellular sodium concentration and resting sodium fluxes of the frog heart ventricle

Keenan¹,

Niedergerke²

1967

The Journal of Physiology

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SUMMARY1. Using 24Na to label the exchangeable sodium in the tissue and either [35S]sulphate or [14C]sucrose to label the extracellular spaces, the intracellular sodium concentration of frog heart ventricles was determined and found to be between about 5 and 10 m-mole/kg cell water.2. The intracellular potassium concentration, obtained by flamephotometric analysis, was approximately 163 m-mole/kg cell water.3. Two different methods were employed to study the sodium tracer efflux of resting heart ventricles. One involved a double-tracer technique, using 24Na to indicate the release of the exchangeable tissue sodium, and 35SO4 to indicate, approximately, the release of extra-myocardial sodium. In the other a comparison was made of the sodium release from the tissue when it contained sodium either at the normal concentration or at a concentration enhanced by exchange with intracellular potassium.4. The magnitude of the sodium efflux from heart fibres as measured by both methods was of the order 50-100 p-mole/cm2 sec. Simultaneously with this cellular efflux a substantial amount of sodium was released from extra-myocardial spaces and tissues.5. The net efflux of potassium ions from heart cells that occurred when heart ventricles were perfused with potassium-depleted fluids was determined. The results were used to obtain an indirect estimate, of about 2-3 p-mole/cm2 sec, for the resting sodium influx.6. The significance of these different values of sodium efflux and influx is discussed.

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Compensating circuits for rectifier cells

Cited by 26 publications

References 0 publications

The radiation entrance window of pn junction detectors

The radiation entrance window of pn junction detectors

The Association of Polymer Molecules in Dilute Solution.

Intracellular sodium concentration and resting sodium fluxes of the frog heart ventricle

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