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- Viscometry + (Viscometry or viscosity method was one of … Viscometry or viscosity method was one of the first methods used for determining the MW of polymers. In this method, the viscosity of polymer solution is measured, and the simplest method used is capillary viscometry by using the Ubbelohde U-tube viscometer. In this method, both the flow time of the polymer solution (t) and the flow time of the pure solvent (t0) are recorded. The ratio of the polymer solution flow time (t) to the flow time of pure solvent (t0) is equal to the ratio of their viscosities (η/η0) only if they have the same densities./η0) only if they have the same densities.)
- Viscosity (electrolyte) + (Viscosity (electrolyte))
- Viscosity (slurry) + (Viscosity (slurry))
- Visual + (Visual)
- Visual Edit Insert + (Visual Edit Insert)
- Visual Editor Format Text + (Visual Editor Format Text)
- Contributions Dashboard + (Visualize https://battery.knowledge-graph.eu/wiki/Special:Contributions/0000-0003-0410-3616 with https://cal-heatmap.com/)
- Flemish Institute for Technological Research + (Vlaamse Instelling voor Technologisch Onderzoek)
- Full Application + (Vollantrag)
- Volt + (Volt)
- VoltPerMetre + (Volt Per Meter (V/m) is a unit in the cate … Volt Per Meter (V/m) is a unit in the category of Electric field strength. It is also known as volts per meter, volt/meter, volt/metre, volt per metre, volts per metre. This unit is commonly used in the SI unit system. Volt Per Meter (V/m) has a dimension of MLT⁻³I⁻¹ where M is mass, L is length, T is time, and I is electric current. This unit is the standard SI unit in this category.</br></br>-- QUDTtandard SI unit in this category. -- QUDT)
- VoltPerKelvin + (Volt per Kelvin.)
- VoltAmpere + (VoltAmpere)
- VoltPerCentiMetre + (VoltPerCentiMetre)
- VoltPerKelvin + (VoltPerKelvin)
- VoltPerMetre + (VoltPerMetre)
- VoltPerMicroSecond + (VoltPerMicroSecond)
- VoltPerMilliMetre + (VoltPerMilliMetre)
- VoltPerSecond + (VoltPerSecond)
- VoltPerSquareMetre + (VoltPerSquareMetre)
- VoltSecondPerMetre + (VoltSecondPerMetre)
- Volta Foundation + (Volta Foundation)
- Voltage + (Voltage)
- ThermoelectricVoltage + (Voltage between substances a and b caused by the thermoelectric effect.)
- SourceVoltage + (Voltage between the two terminals of a voltage source when there is no electric current through the source.)
- ComplexPower + (Voltage phasor multiplied by complex conjugate of the current phasor.)
- Voltage range (formation) + (Voltage range (formation))
- Voltage range (testing) + (Voltage range (testing))
- Voltage range (testing, lab scale) + (Voltage range (testing, lab scale))
- VoltageChangeLimit + (VoltageChangeLimit)
- VoltageChangeRate + (VoltageChangeRate)
- VoltageControlledProcess + (VoltageControlledProcess)
- VoltageData + (VoltageData)
- VoltageHold + (VoltageHold)
- VoltageLimit + (VoltageLimit)
- VoltageMeasurement + (VoltageMeasurement)
- VoltageMeasurementResult + (VoltageMeasurementResult)
- VoltagePhasor + (VoltagePhasor)
- VoltaicPile + (VoltaicPile)
- Voltammetry + (Voltammetry)
- ACVoltammetry + (Voltammetry in which a sinusoidal alternating potential of small amplitude (10 to 50 mV) of constant frequency (10 Hz to 100 kHz) is superimposed on a slowly and linearly varying potential ramp. The obtained AC voltammogram is peak-shaped.)
- SquareWaveVoltammetry + (Voltammetry in which a square-wave potenti … Voltammetry in which a square-wave potential waveform is superimposed on an underlying linearly varying potential ramp or staircase ramp. Most instruments show plots of the current at the end of the forward-going pulse and of the backward-going pulse vs. the potential, as well as their difference. This can give valuable information on the kinetics of the electrode reaction and the electrode process. The current is sampled just before the end of the forward- going pulse and of the backward-going pulse and the difference of the two sampled currents is plotted versus the applied potential of the potential or staircase ramp. The square-wave voltammogram is peak-shaped. The sensitivity of SWV depends on the reversibility of the electrode reaction of the analyte. of the electrode reaction of the analyte.)
- NormalPulseVoltammetry + (Voltammetry in which potential pulses of a … Voltammetry in which potential pulses of amplitude increasing by a constant increment and with a pulse width of 2 to 200 ms are superimposed on a constant initial potential. Normal pulse polarography is NPV in which a dropping mercury electrode is used as the working electrode. A pulse is applied just before the mechanically enforced end of the drop. The pulse width is usually 10 to 20 % of the drop time. The drop dislodgment is synchro- nized with current sampling, which is carried out just before the end of the pulse, as in NPV. Sigmoidal wave-shaped voltammograms are obtained. The current is sampled at the end of the pulse and then plotted versus the potential of the pulse. The current is sampled just before the end of the pulse, when the charging current is greatly diminished. In this way, the ratio of faradaic current to charging current is enhanced and the negative influence of charging current is partially eliminated. Due to the improved signal (faradaic current) to noise (charging current) ratio, the limit of detec- tion is lowered. The sensitivity of NPV is not affected by the reversibility of the electrode reaction of the analyte. of the electrode reaction of the analyte.)
- DifferentialPulseVoltammetry + (Voltammetry in which small potential pulse … Voltammetry in which small potential pulses (constant height 10 to 100 mV, constant width 10 to 100 ms) are superimposed onto a linearly varying potential or onto a staircase potential ramp. The current is sampled just before the onset of the pulse (e.g. 10 to 20 ms) and for the same sampling time just before the end of the pulse. The difference between the two sampled currents is plotted versus the potential applied before the pulse. Thus, a differential pulse voltammogram is peak-shaped. Differential pulse polarography is differential pulse voltammetry in which a dropping mercury electrode is used as the working electrode. A pulse is applied before the mechani- cally enforced end of the drop and the current is sampled twice: just before the onset of the pulse and just before its end. The pulse width is usually 10 to 20 % of the drop life. The drop dislodgement is synchronized with current sampling, which is carried out as in DPV. The ratio of faradaic current to charging current is enhanced and the negative influence of charging current is partially eliminated in the same way as in normal pulse voltammetry (NPV). Moreover, subtraction of the charging current sampled before the application of the pulse further decreases its negative influence. Due to the more enhanced signal (faradaic current) to noise (charging current) ratio, the limit of detection is lower than with NPV. The sensitivity of DPV depends on the reversibility of the electrode reaction of the analyte. of the electrode reaction of the analyte.)
- LinearScanVoltammetry + (Voltammetry in which the current is record … Voltammetry in which the current is recorded as the electrode potential is varied linearly with time. LSV corresponds to the first half cycle of cyclic voltammetry. The peak current is expressed by the Randles-Ševčík equation. The scan is usually started at a potential where no electrode reaction occurs.ential where no electrode reaction occurs.)
- CyclicVoltammetry + (Voltammetry in which the electric current … Voltammetry in which the electric current is recorded as the electrode potential is varied with time cyclically between two potential limits, normally at a constant scan rate. Cyclic voltammetry is frequently used for the investigation of mechanisms of electrochemical/electrode reactions. The current-potential curve may be modelled to obtain reaction mechanisms and electrochemical parameters. Normally the initial potential is chosen where no electrode reaction occurs and the switching potential is greater (more positive for an oxidation or more negative for a reduction) than the peak potential of the analyte reaction. The initial potential is usually the negative or positive limit of the cycle but can have any value between the two limits, as can the initial scan direction. The limits of the potential are known as the switching potentials. The plot of current against potential is termed a cyclic voltammogram. Usually peak-shaped responses are obtained for scans in both directions.are obtained for scans in both directions.)
- Voltammetry + (Voltammetry is an analytical technique bas … Voltammetry is an analytical technique based on the measure of the current flowing through an electrode dipped in a solution containing electro-active compounds, while a potential scanning is imposed upon it. The current vs. potential (I-E) curve is called a voltammogram.tial (I-E) curve is called a voltammogram.)
- HydrodynamicVoltammetry + (Voltammetry with forced flow of the soluti … Voltammetry with forced flow of the solution towards the electrode surface. A linear potential scan, at sufficiently slow scan rates so as to ensure a steady state response, is usually applied. Mass transport of a redox species enhanced by convection in this way results in a greater electric current. Convective mass transfer occurs up to the diffusion-limiting layer, within which the mass transfer is controlled by diffusion. Electroactive substance depletion outside the diffusion layer is annulled by convective mass transfer, which results in steady- state sigmoidal wave-shaped current-potential curves. The forced flow can be accomplished by movement either of the solution (solution stirring, or channel flow), or of the electrode (electrode rotation or vibration).ectrode (electrode rotation or vibration).)
- VoltammetryAtARotatingDiskElectrode + (VoltammetryAtARotatingDiskElectrode)
- Voltammogram + (Voltammogram)
- Voltmeter + (Voltmeter)