Property:HasDescription
Property:HasDescription
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| ID | HasDescription |
| UUID | 2112e551-2c06-4e1c-95bc-894d652cdbab |
| Label | HasDescription |
| Machine compatible name | HasDescription |
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Description
No description found
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| nameFor properties this value is the primary identifier.<br>Definition: Entity, Property | HasDescription |
| ontology_irie. g. from https://www.qudt.org/doc/DOC_VOCAB-QUANTITY-KINDS.html<br>Definition: Property | |
| AnnotationProperty | |
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| property_typesee https://www.semantic-mediawiki.org/wiki/Help:List_of_datatypes<br>Definition: Property, AnnotationProperty | Monolingual text |
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| property_type | "Monolingual text" | |||||
| uuid | "2112e551-2c06-4e1c-95bc-894d652cdbab" | |||||
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C
Electrochemical measurement principle in which the electric charge required to carry out a known electrochemical reaction is measured. By Faraday’s laws of electrolysis, the amount of substance is proportional to the charge. Coulometry used to measure the amount of substance is a primary reference measurement procedure [VIM 2.8] not requiring calibration with a standard for a quantity of the same kind (i.e. amount of substance). The coulometric experiment can be carried out at controlled (constant) potential (see direct coulometry at controlled potential) or controlled (constant) current (see direct coulometry at controlled current). (en) +
The creep test is a destructive materials testing method for determination of the long-term strength and heat resistance of a material. When running a creep test, the specimen is subjected to increased temperature conditions for an extended period of time and loaded with a constant tensile force or tensile stress. (en) +
Chronopotentiometry where the change in applied current undergoes a cyclic current reversal. (en) +
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. (en) +
D
Linear scan voltammetry with slow scan rate in which a dropping mercury electrode is used as the working electrode. If the whole scan is performed on a single growing drop, the technique should be called single drop scan voltammetry. The term polarography in this context is discouraged. This is the oldest variant of polarographic techniques, introduced by Jaroslav Heyrovský (1890 – 1967). Usually the drop time is between 1 and 5 s and the pseudo-steady-state wave-shaped dependence on potential is called a polarogram. If the limiting current is controlled by diffusion, it is expressed by the Ilkovich equation. (en) +
Data processing activities performed on the secondary data to determine the characterisation property (e.g. classification, quantification), which can be performed manually or exploiting a model. (en) +
Data filtering is the process of examining a dataset to exclude, rearrange, or apportion data according to certain criteria. (en) +
Data normalization involves adjusting raw data to a notionally common scale. (en) +
Analysis, that allows one to calculate the final material property from the calibrated primary data. (en) +
Data preparation is the process of manipulating (or pre-processing) data (which may come from disparate data sources) to improve their quality or reduce bias in subsequent analysis. (en) +
Specific type of sample that is a device. (en) +
Dielectric spectroscopy (DS) or impedance spectroscopy, also known as electrochemical impedance spectroscopy, is frequently used to study the response of a sample subjected to an applied electric field of fixed or changing frequency. DS describes the dielectric properties of a material as a function of frequency. In DS, the radio and microwave frequency regions of the electromagnetic spectrum have been successfully made to interact with materials, so as to study the behavior of molecules. The interaction of applied alternating electric fields with dipoles possessing reorientation mobility in materials is also dealt by DS. (en) +
S
Spectroscopy is a category of characterization techniques which use a range of principles to reveal the chemical composition, composition variation, crystal structure and photoelectric properties of materials. (en) +
D
Electrochemical measurement principle based on the measurement of the dielectric constant of a sample resulting from the orientation of particles (molecules or ions) that have a dipole moment in an electric field. Dielectrometric titrations use dielectrometry for the end-point detection. The method is used to monitor the purity of dielectrics, for example to detect small amounts of moisture. (en) +
Differential Pulse Voltammetry in which small potential pulses are superimposed onto a linearly varying potential. (en) +
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. (en) +
Differential scanning calorimetry (DSC) is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature. Both the sample and reference are maintained at nearly the same temperature throughout the experiment. Generally, the temperature program for a DSC analysis is designed such that the sample holder temperature increases linearly as a function of time. The reference sample should have a well-defined heat capacity over the range of temperatures to be scanned. Additionally, the reference sample must be stable, of high purity, and must not experience much change across the temperature scan. Typically, reference standards have been metals such as indium, tin, bismuth, and lead, but other standards such as polyethylene and fatty acids have been proposed to study polymers and organic compounds, respectively. (en) +
Differential Pulse Voltammetry in which small potential pulses are superimposed onto a staircase potential ramp. (en) +
Differential thermal analysis (DTA) is a thermoanalytic technique that is similar to differential scanning calorimetry. In DTA, the material under study and an inert reference are made to undergo identical thermal cycles, (i.e., same cooling or heating programme) while recording any temperature difference between sample and reference.[1] This differential temperature is then plotted against time, or against temperature (DTA curve, or thermogram). Changes in the sample, either exothermic or endothermic, can be detected relative to the inert reference. Thus, a DTA curve provides data on the transformations that have occurred, such as glass transitions, crystallization, melting and sublimation. The area under a DTA peak is the enthalpy change and is not affected by the heat capacity of the sample. (en) +
Dilatometry is a method for characterising the dimensional changes of materials with variation of temperature conditions. (en) +