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Quenching of fluorescence
| Глоссарий по тестированию |
Extinction of fluorescence by causes other than removal of the ultraviolet radiation (the exciting radiation). r
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Fluorescence, английский
- Emission of light of particular wavelength, as a result of absorption of light at shorter wavelength. it is a property of some materials; each material has a specific wavelength of absorption and emission.
- Luminescence arising from irradiation with light
- The emission of visible light from a substance (such as a phosphor) as the result of, and during, the absorption of radiation of shorter wavelengths.
- The sending out of light from a substance which is receiving radiation
- Certain diamonds exhibit colored luminescence (usually blue) when exposed to strong sunlight or ultraviolet light. all you need to know about diamond fluorescence.
- Emission of visible light by a material such as diamond when it is simulated by higher energy x-rays, ultraviolet radiation or other forms of radiation. fluorescence continues only as long as the material is exposed to the radiation. strong or very strong fluorescence may make a diamond appear milky or oily especially in sunlight.
- Fluorescence happens when a diamond is exposed to ultraviolet light, it may emit a soft glow of white-ish, blue-ish or yellowish light. diamond grading reports will most often note whether a diamond has fluorescence, however, is not considered a grading factor, only a characteristic of that particular diamond.
- The property by which some minerals and some organic substances, when exposed to ultra¬violet radiations, emit a light of a color differing from their own, like the blue-white light emitted by scheelite.
- Emission of electromagnetic radiation, usually as visible light, that is caused by the flow of energy into the emitting body. the emission ceases abruptly when the excitation ceases. fly: the short, waste fibers that are released into the air in textile processing operations such as picking, carding, spinning, and weaving.
- The process in which molecules or matter absorb high energy photons and then emit lower energy photons. the difference in energy causes molecular vibrations.
- Phenomenon of absorption of electromagnetic radiation and its reemission at a lower energy (longer wavelength). in visual testing, fluorescence is typically a response to ultraviolet radiation.
- Phenomenon of absorption of electromagnetic radiation and its reemission at a lower energy (longer) visible light wavelength. fluorescence in ndt may be a material’s response to ultraviolet or ionizing radiation. the emission ceases as soon as the exciting energy is removed. differs from phosphorescence, which continues to emit after excitation energy is removed.
- Phenomenon of absorption of electromagnetic radiation and its reemission at a lower energy (longer) visible light wavelength. fluorescence may be a material’s response to ultraviolet or ionizing radiation. the emission ceases as soon as the exciting energy is removed. differs from phosphorescence, which continues to emit after excitation energy is removed. see also spectrofluorometer.
- Luminescent phenomenon exhibited by some substances where higher energy electromagnetic waves are absorbed and reemitted as lower energy waves. the emission ceases as soon as the exciting energy is removed. different from phosphorescence, which will continue to emit after the exciting energy is removed. in magnetic particle testing, pigments coating the magnetic particles are excited by invisible uv-a radiation and emit visible light.
Fluorescence immunoassay, английский
Метод прямой иммунофлюоресценции (пиф), син. прямой иммунофлуоресцентный анализ см. immunofluorescence technique (иммунофлуоресцентный метод).
Fluorescence in-situ hybridization, английский
Fluorescence microscope, английский
- Microscope that uses a fluorescent dyed sample and sample emitted light to form a magnified image of the sample
- A microscope that uses natural fluorochromes or fluorescent stains to increase contrast
Fluorescence microscopy, английский
- A technique for acquiring microscopic images using fluorescence which is excited in the sample
- Microscopía fluorescente
Fluorescence spectroscopy, английский
A technique to measure the interaction of radiant energy with matter by passing emitted fluorescent light through a monochromator to record the fluorescence emission spectrum.
Fluorescence-activated cell sorter (facs), английский
Technique for using a flow cytometer to physically separate cells into two populations based on fluorescence intensity
Quench, английский
- 1. a box filled with water into which fabric is run after singeing to prevent sparks or fires. 2. see cabinet. (also see quenching.)
- The conductive cooling of a portion of the cylinder head gases during combustion in an internal combustion engine, usually by minimizing the clearance between piston crown and cylinder head. the high local surf ace,volume ratio effects rapid heat loss and suppresses detonation, th
Quench (gespr. kwensch), английский
Quench ageing, английский
Старение после закалки
Quench aging, английский
Aging induced by rapid cooling after solution heat treatment.
Quench annealing, английский
Annealing an austenitic ferrous alloy by solution heat treatment.
Quench bath, английский
Quench column, английский
Quench cracking, английский
Quench cracks, английский
Quench hardening, английский
Hardening a ferrous alloy by austenitizing and then cooling rapidly enough so that some or all of the austenite transforms to martensite. the austenitizing temperature for hypo eutectoid steels is usually above ac3 and for hypereutectoid steels usually between acl and accm.
Quench motor, английский
Engine exhibiting quench features in combustion chamber design. figure q.l the quiescent combustion chamber of a larger diesel engine 116 quick
Quench oils, английский
Paraffin oils with high flash points, usually exhibiting excellent oxidation and thermal stability, suitable for either tempering or martempering. testing methods include astm d-3520, an older quench speed test, and a newer computer-recorded diacpot test that gives quantitatively more information about the quenching process. r&o oil: oils with rust and oxidation inhibitors, usually applied to highly refined circulating oils used for long term service, as in compressors, hydraulic systems and turbines.
Quench spacer, английский
The “quiet” zone below the spinneret in which there is no quench airflow. quench spacer distance is important in controlling fiber orientation and birefringence.
Quench tank, английский
Qt
Extinction, французский
Dans le conditionnement classique, il s'agit de la diminution de l'intensité de la réponse lorsqu'on cesse d'associer le stimulus conditionnel au stimulus inconditionnel
Ultraviolet, английский
- Electromagnetic radiation at wavelengths shorter than the violet end of visible light
- Ultraviolet. the electromagnetic radiation with wavelengths shorter than about 400 nm and not visible to the human eye.
- Ультрафиолетовый
- Invisible electromagnetic radiation defined between 100 and 380nm.
- The part of the electromagnetic spectrum that falls just below visible violet. ultraviolet (uv) coating – a coating that blocks out uv radiation up to 380+ nanometers.
- Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.
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Radiant exitance, английский
Radiant power per area, emitted or reflected from a certain location on a surface. measured in watts per square meter (w/m2). compare luminous exitance.
Pure air supply, английский
In leak testing, air that has been cleaned of halogen contamination by means of an activated charcoal filter. this term is sometimes also used to describe any nonreactive gas, such as nitrogen, that contains no halogen contamination and to which the leak detector is not sensitive. q
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