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X-ray fluorescence
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A diamond’s ability to emit secondary x-rays when it is exposed to an x-ray. this characteristic is used to identify a diamond or other stone by indicating its chemical elements.
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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
X-ray, английский
- 1. a ray with a very short wavelength, which is invisible, but can go through soft tissue and register as a photograph on a film. x-rays are used in diagnosis in radiography, and in treating disease by radiotherapy. the x-ray examination showed the presence of a tumour in the colon. 2. a photograph taken using x-rays the dentist took some x-rays of the patient’s teeth. he pinned the x-rays to the light screen. 3. an examination in which x-ray photographs are taken all the staff had to have chest x-rays. verb to take an x-ray photograph of a patient there are six patients waiting to be x-rayed. comment: because x-rays go through soft tissue, it is sometimes necessary to make inter- x-ray imaging 458 nal organs opaque so that they will show up on the film. in the case of stomach x-rays, people take a barium meal before being photographed (contrast radiography); in other cases, such as kidney x-rays, radioactive substances are injected into the bloodstream or into the organ itself. x-rays are used not only in radiography for diagnosis but as a treatment in radiotherapy as rapidly dividing cells such as cancer cells are most affected. excessive exposure to x-rays, either as a person being treated, or as a radiographer, can cause radiation sickness.
- Radiografía/ rayos x
X-ray absorption fine structure, английский
X-ray absorption near edge structure, английский
X-ray analysis, английский
The use of x-ray radiation to detect heavy elements in the presence of lighter ones, to give critical-edge absorption to identify elemental composition, and to identify crystal structures by diffraction patterns.
X-ray computed tomography, английский
X-ray confirmed pneumonia, английский
Ренгенологически подтвержденная пневмония
X-ray diagnosis, английский
- Рентгенологическая диагностика x-ray confirmed pneumonia/ ренгенологически подтвержденная пневмония y yellow fever (yf)
- Рентгенологическая диагностика
X-ray diffraction, английский
The scattering of x-rays from a crystal, resulting in an interference pattern used to determine the structure of the crystal.
X-ray film (rt), английский
A film base that is coated (usually on both sides) with an emulsion designed for use with xrays.
X-ray fluorescence analysis, английский
X-ray fluorescence logging, английский
X-ray fluorescence sampling, английский
X-ray fluorescence survey, английский
Characteristic, английский
- Property that helps to distinguish between items of a given population (3)
- A quality which allows something to be recognised as different cancer destroys the cell’s characteristics. adjective being a typical or distinguishing quality symptoms characteristic of anaemia the inflammation is characteristic of shingles.
- N характеристика (см. тж. portrayal) articulatory ~ артикуляторная характеристика perceptual ~ перцептивная характеристика, характеристика восприятия
- Характерная особенность, признак; характеристика, особенность ~s of the loading особенности [параметры] нагружение (конструкции)
- The characteristic dimension dc
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Bezel facet, английский
On a round brilliant diamond, these are eight large kite shaped facets on the crown. also called the top main facets.
Twinning wisp, английский
An irregular, ribbon-like inclusion inside a diamond
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