| spectrometry, gamma | Determination of the energy distribution of gamma rays emitted by nuclei. (12 Dec 1998) |
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| spectrometry, mass, fast atom bombardment | A mass spectrometric technique that is used for the analysis of a wide range of biomolecules, such as glycoalkaloids, glycoproteins, polysaccharides, and peptides. Positive and negative fast atom bombardment spectra are recorded on a mass spectrometer fitted with an atom gun with xenon as the customary beam. The mass spectra obtained contain molecular weight recognition as well as sequence information. (12 Dec 1998) |
| spectrometry, mass, matrix-assisted laser desorption-ionization | A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis. (12 Dec 1998) |
| spectrometry, mass, secondary ion | A mass-spectrometric technique that is used for microscopic chemical analysis. A beam of primary ions with an energy of 5-20 kiloelectronvolts (kev) bombards a small spot on the surface of the sample under ultra-high vacuum conditions. Positive and negative secondary ions sputtered from the surface are analyzed in a mass spectrometer in regards to their mass-to-charge ratio. (12 Dec 1998) |
| spectrometry, X-ray emission | Identification and measurement of concentration of elements based on the fact that X-rays emitted by an excited element have a wavelength characteristic of that element and an intensity related to its concentration. It includes fluorescence, or secondary-emission, X-ray spectrometry, in which the specimen is irradiated by X-rays. Primary-emission x-ray spectrometry, in which the specimen is bombarded by electrons, is a specific type of X-ray emission spectrometry known as electron probe microanalysis. (12 Dec 1998) |
| spectrophobia | <psychology> Morbid fear of mirrors or of one's mirrored image. Origin: spectro-+ G. Phobos, fear (05 Mar 2000) |
| spectrophotofluorimetry | Measurement of the intensity and quality of fluorescence by means of a spectrophotometer. (05 Mar 2000) |
| spectrophotometer | A machine used to measure how much light of a given wavelength is absorbed by a liquid sample, or to measure how intense (bright) the spectral lines and bands produced by the sample are, relative to each other. (09 Oct 1997) |
| spectrophotometry | Quantitative measurements of concentrations of reagents made by measuring the absorption of visible, ultraviolet or infrared light. (18 Nov 1997) |
| spectrophotometry, atomic absorption | A highly sensitive technique used to analyze various elements, especially metals, including aluminum, arsenic, beryllium, calcium, copper, iron, lead, and lithium, which are present in trace amounts. The atoms are excited above a ground state by flame vaporization, and the radiation emitted as the molecules return to a ground state is measured in unexcited non-ionised molecules. (12 Dec 1998) |
| spectrophotometry, infrared | Spectrophotometry in the infrared region, usually for the purpose of chemical analysis through measurement of absorption spectra associated with rotational and vibrational energy levels of molecules. (12 Dec 1998) |
| spectrophotometry, ultraviolet | Determination of the spectra of ultraviolet absorption by specific molecules in gases or liquids, for example cl2, so2, no2, cs2, ozone, mercury vapor, and various unsaturated compounds. (12 Dec 1998) |
| spectropolarimeter | An instrument for measuring the rotation of the plane of polarised light of specific wavelength upon passage through a solution or translucent solid. Origin: spectro-+ polarimeter (05 Mar 2000) |
| spectroscope | <instrument, physics> An optical instrument for forming and examining spectra (as that of solar light, or those produced by flames in which different substances are volatilized), so as to determine, from the position of the spectral lines, the composition of the substance. Origin: Spectrum + -scope. Source: Websters Dictionary (01 Mar 1998) |
| spectroscopic | Relating to or performed by means of a spectroscope. (05 Mar 2000) |
| speciation |
Speciation is a process that occurs naturally in evolution and is modeled explicitly in some genetic algorithms. Speciation in nature occurs when two similar reproducing beings evolve to become too dissimilar to share genetic information effectively or correctly. In the case of living organisms, they are incapable of mating to produce offspring. Interesting special cases exist such as a horse and a donkey mating to produce an infertile mule. ...
출처: en.wikipedia.org/wiki/Speciation_(genetic_algorith...
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| specific language impairment |
Specific language impairment (SLI) is a form of language disorder that affects both expressive and receptive language. SLI is a "pure" language impairment, meaning that is not related to or caused by other developmental disorders. Children with SLI acquire language in the same sequence as normally-developing children, but at a slower rate. SLI manifests itself in different ways across individuals, but a hallmark of SLI is difficulty with inflected forms of words. ...
출처: en.wikipedia.org/wiki/Specific_language_impairment
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| spectrograph |
A spectrometer is an optical instrument for measuring properties of light over some portion of the electromagnetic spectrum. The measured variable is often the light intensity but could also be the polarization state, for instance. ...
출처: en.wikipedia.org/wiki/Spectrograph
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| spectrometer |
A spectrometer is an optical instrument for measuring properties of light over some portion of the electromagnetic spectrum. The measured variable is often the light intensity but could also be the polarization state, for instance. ...
출처: en.wikipedia.org/wiki/Spectrometer
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| SPECT |
Single-photon emission computed tomography. A special type of computed tomography (CT) scan in which a small amount of a radioactive drug is injected into a vein and a scanner is used to make detailed images of areas inside the body where the radioactive material is taken up by the cells. SPECT can give information about blood flow to tissues and chemical reactions (metabolism) in the body.
출처: www.stjude.org/glossary
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| SPEC | select something or someone for a specific purpose |
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| SPEC | design or destine |
| SPEC | define clearly |
| SPEC | decide upon or fix definitely |
| SPEC | specify as a condition or requirement in a contract or agreement |
| SPEC | be specific about |
| SPEC | determine the essential quality of |
| SPEC | a bit of tissue or blood or urine that is taken for diagnostic purposes |
| SPEC | an example regarded as typical of its class |
| SPEC | a bottle for holding urine specimens |
| SPEC | based on pretense |
| SPEC | plausible but false |