Fast relaxation processes and structural changes in immunoactive biomolecules
| Autor: | A. L. Mikhal'chuk, V. L. Dubovsky, T. F. Raichyonok, G. B. Tolstorozhev, Sergei A. Tikhomirov, N. A. Borisevich |
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| Rok vydání: | 2004 |
| Předmět: |
Time Factors
Light Absorption spectroscopy Biophysics Photoionization Photochemistry Biochemistry Biomaterials Biopolymers Ionization Ultrafast laser spectroscopy Molecule Ions Chemistry Lasers Organic Chemistry General Medicine Hydrogen-Ion Concentration Fluorescence Kinetics Models Chemical Spectrophotometry Azasteroids Picosecond Excited state Glass Diterpenes Protons |
| Zdroj: | Biopolymers. 74:105-109 |
| ISSN: | 1097-0282 0006-3525 |
| DOI: | 10.1002/bip.20054 |
| Popis: | Based upon an analysis of the absorption spectra, the fluorescence and fluorescence excitation spectra, and the lifetime of the excited states of aqueous solutions (pH 7.4) of 2,3-dimethoxy-8-azagona-1,3,5(10),13-tetraene-12,17-dione, it is established that two centers of different type exist: one emits long-wave (L-centers) and the other short-wave (S-centers) fluorescence. Irradiation of solutions increases the number of L-centers and greatly decreases that of S-centers. Examination of the picosecond transient absorption spectra and their kinetics revealed that the initial photochemical stage is defined as the ionization of a considered molecule and the subsequent one, as the formation, most probably, of the dehydroderivative of a parent molecule. © 2004 Wiley Periodicals, Inc. Biopolymers, 2004 |
| Databáze: | OpenAIRE |
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