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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Supercritical angle fluorescence microscopy ： ウィキペディア英語版 Supercritical angle fluorescence microscopy Supercritical angle fluorescence microscopy (SAF) is a technique to detect and characterize fluorescent species (proteins, biomolecules, pharmaceuticals, etc.) and their behaviour close or even adsorbed or linked at surfaces. The method is able to observe molecules in a distance of less than 100 to 0 nanometer from the surface even in presence of high concentrations of fluorescent species around. Using an aspheric lens for excitation of a sample with laser light, fluorescence emitted by the specimen is collected above the critical angle of total internal reflection selectively and directed by a parabolic optics onto a detector. The method was invented in 1998 in the laboratories of Stefan Seeger at University of Regensburg/Germany and later at University of Zurich/Switzerland. == SAF microscopy principle == The principle how SAF Microscopy works is as follows: A fluorescent specimen does not emit fluorescence isotropically when it comes close to a surface, but approximately 70% of the fluorescence emitted is directed into the solid phase. Here, the main part enters the solid body above the critical angle.〔J. Enderlein, T. Ruckstuhl, S. Seeger: Highly Efficient Optical Detection of Surface-Generated Fluorescence. Appl. Opt. 38 (4) 724-32 (1999) 〕 When the emitter is located just 200 nm above the surface, fluorescent light entering the solid body above the critical angle is decreased dramatically. Hence, SAF Microscopy is ideally suited to discriminate between molecules and particles at or close to surfaces and all other specimen present in the bulk,.〔T. Ruckstuhl, M. Rankl, S. Seeger: Highly sensitive biosensing using a Supercritical Angle Fluorescence (SAF) instrument, Biosensors&Bioelectronics 18 (9) 1193-1199 (2003)〕〔T. Ruckstuhl, S. Seeger: Attoliter detection volumes by confocal total-internal-reflection fluorescence microscopy, Optic Letters 29, 569-571 (2004)〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Supercritical angle fluorescence microscopy」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.