| ลองค้นหาคำในรูปแบบอื่น ๆ เพื่อให้ได้ผลลัพธ์มากขึ้นหรือน้อยลง: -fluore-, *fluore* |
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| | | | | | | fluoresce | (v) exhibit or undergo fluorescence | | fluorescein | (n) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed), Syn. resorcinolphthalein, fluoresceine, fluorescent dye | | fluorescein isothiocyanate | (n) a fluorochrome commonly conjugated with antibodies for use in indirect immunofluorescence, Syn. fluorescein isocyanate | | fluorescence | (n) light emitted during absorption of radiation of some other (invisible) wavelength | | fluorescence microscopy | (n) light microscopy in which the specimen is irradiated at wavelengths that excite fluorochromes | | fluorescent | (n) a lighting fixture that uses a fluorescent lamp, Syn. fluorescent fixture | | fluorescent | (adj) emitting light during exposure to radiation from an external source | | fluorescent | (adj) brilliantly colored and apparently giving off light | | fluorescent lamp | (n) lamp consisting of a tube coated on the inside with a fluorescent material; mercury vapor in the tube emits ultraviolet radiation that is converted to visible radiation by the fluorescent material |
| | Fluorene | n. (Chem.) A colorless, crystalline hydrocarbon, C13H10 having a beautiful violet fluorescence; whence its name. It occurs in the higher boiling products of coal tar, and is obtained artificially. [ 1913 Webster ] | | fluorescein | n. (Chem.) A yellowish red, crystalline substance, C20H12O5, produced by heating together phthalic anhydride and resorcin; -- so called, from the very brilliant yellowish green fluorescence of its alkaline solutions. It has acid properties, and its salts of the alkalies are known to the trade under the name of uranin.
Syn. -- fluorescein, fluorescent dye, resorcinolphthalein. [ 1913 Webster ] Variants: fluoresceine | | Fluorescence | n. [ From Fluor. ] (Chemistry, Optics) A luminescence emitted by certain substances due to the absorption of radiation at one wavelength, and the almost instantaneous re-emission of radiation at another, usually longer wavelength. The re-radiation stops almost as soon as the incident radiation is halted, thus distinguishing this phenomenon from phosphorescence, in which re-radiation of light may continue for some time after the incident radiation is halted. The color of the radiated light typically differs from the apparent color of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it, by first absorbing the light to achieve an excited state, and then radiating light to resume the ground energy level. The light emitted by fluorescent substances is in general of longer wavelength than the incident light. The radiation can also be induced by ionizing radiation which is not electromagnetic, such as alpha or beta rays, and cathode rays. This property is possessed by fluorspar, uranium glass, sulphide of calcium, and many other substances. It finds use in analytical instruments to detect or measure radiation, and in some commercial applications. [ 1913 Webster +PJC ] | | Fluorescent | a. Having the property of fluorescence. [ 1913 Webster ] | | Fluorescin | n. (Chem.) A colorless, amorphous substance which is produced by the reduction of fluoresceïn, and from which the latter may be formed by oxidation. [ 1913 Webster ] |
| | | | 蛍光;螢光 | [けいこう, keikou] (n, adj-no) fluorescence #14,079 [Add to Longdo] | | サークライン | [sa-kurain] (n) circular fluorescent lamp (Circuline) [Add to Longdo] | | 官求品 | [かんきゅうひん, kankyuuhin] (n) fluorescent light bulb [Add to Longdo] | | 蛍光管 | [けいこうかん, keikoukan] (n) (See 真空蛍光管) fluorescent tube [Add to Longdo] | | 蛍光色 | [けいこうしょく, keikoushoku] (n, adj-no) fluorescent color; fluorescent colour [Add to Longdo] | | 蛍光体 | [けいこうたい, keikoutai] (n) (See 蛍光物質) fluorescent substance [Add to Longdo] | | 蛍光塗料 | [けいこうとりょう, keikoutoryou] (n) fluorescent paint [Add to Longdo] | | 蛍光灯(P);蛍光燈(oK);螢光灯(oK);螢光燈(oK) | [けいこうとう, keikoutou] (n) (1) fluorescent lamp; fluorescent light; (2) person who is slow to react; someone slow on the uptake; (P) [Add to Longdo] | | 蛍光板 | [けいこうばん, keikouban] (n) fluorescent screen [Add to Longdo] | | 蛍光物質 | [けいこうぶっしつ, keikoubusshitsu] (n) (See 蛍光体) fluorescent substance; phosphor [Add to Longdo] |
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