Property:HasDescription
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| UUID | 2112e551-2c06-4e1c-95bc-894d652cdbab |
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Description
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| property_type | "Monolingual text" | |||||
| uuid | "2112e551-2c06-4e1c-95bc-894d652cdbab" | |||||
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L
Describes the level of expertise required to carry out a process (the entire test or the data processing). (en) +
Light scattering is the way light behaves when it interacts with a medium that contains particles or the boundary between different mediums where defects or structures are present. It is different than the effects of refraction, where light undergoes a change in index of refraction as it passes from one medium to another, or reflection, where light reflects back into the same medium, both of which are governed by Snell’s law. Light scattering can be caused by factors such as the nature, texture, or specific structures of a surface and the presence of gas, liquid, or solid particles through which light propagates, as well as the nature of the light itself, of its wavelengths and polarization states. It usually results in diffuse light and can also affect the dispersion of color. (en) +
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. (en) +
M
Mass spectrometry is a powerful analytical technique used to quantify known materials, to identify unknown compounds within a sample, and to elucidate the structure and chemical properties of different molecules. (en) +
A class from CHAMEO (en) +
Activity which has the goal of adjusting/tuning a measing instrument, without performing a measurement on a reference sample (which is a calibration). The output of this process can be a specific measurement parameter to be used in the characteriasation measurement process. (en) +
The overall time needed to acquire the measurement data. (en) +
C
Represents every type of data that is produced during a characterisation process (en) +
M
In the membrane osmometry technique, a pure solvent and polymer solution are separated by a semipermeable membrane, due to the higher chemical potential of the solvent in the pure solvent than in polymer solution, the solvent starts moving towards the polymer solution. (en) +
A method used to measure the pore size distribution and total pore volume of solid materials by infiltrating mercury into the pores under controlled pressure conditions and analyzing the amount of mercury intrusion. (en) +
Milling is a machining process that involves the use of a milling machine to remove material from a workpiece. Milling machines feature cutting blades that rotate while they press against the workpiece. (en) +
N
Nanoindentation (known also as nanoindentation test) is a method for testing the hardness and related mechanical properties of materials, facilitated by high-precision instrumentation in the nanometer scale, as well as analytical and computational algorithms for result evaluation. (en) +
Neutron spin echo spectroscopy is a high resolution inelastic neutron scattering method probing nanosecond dynamics. Neutron spin echo (NSE) spectroscopy uses the precession of neutron spins in a magnetic field to measure the energy transfer at the sample and decouples the energy resolution from beam characteristics like monochromatisation and collimation. (en) +
Near edge X-ray absorption fine structure (NEXAFS), also known as X-ray absorption near edge structure (XANES), is a type of absorption spectroscopy that indicates the features in the X-ray absorption spectra (XAS) of condensed matter due to the photoabsorption cross section for electronic transitions from an atomic core level to final states in the energy region of 50–100 eV above the selected atomic core level ionization energy, where the wavelength of the photoelectron is larger than the interatomic distance between the absorbing atom and its first neighbour atoms. (en) +
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. (en) +
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei. This spectroscopy is based on the measurement of absorption of electromagnetic radiations in the radio frequency region from roughly 4 to 900 MHz. Absorption of radio waves in the presence of magnetic field is accompanied by a special type of nuclear transition, and for this reason, such type of spectroscopy is known as Nuclear Magnetic Resonance Spectroscopy. The sample is placed in a magnetic field and the NMR signal is produced by excitation of the nuclei sample with radio waves into nuclear magnetic resonance, which is detected with sensitive radio receivers. The intramolecular magnetic field around an atom in a molecule changes the resonance frequency, thus giving access to details of the electronic structure of a molecule and its individual functional groups. As the fields are unique or highly characteristic to individual compounds, in modern organic chemistry practice, NMR spectroscopy is the definitive method to identify monomolecular organic compounds. (en) +
O
A process in which the electric current is kept constant at 0 (i.e., open-circuit conditions). (en) +