Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Andrey Yu. Chikishev"'
Publikováno v:
The European Physical Journal Plus. 136
Raman microspectroscopy is used to study fragments of the twelfth-century frescos from the Annunciation Church at Gorodishche at Veliky Novgorod. The Church was built in 1103, rebuilt on a new foundation in 1342, and almost completely destroyed by Ge
Autor:
Irina A. Grigorieva, Svetlana A. Pisareva, Irina F. Kadikova, I.A. Balakhnina, Andrey Yu. Chikishev, Yurii I. Grenberg, Nikolay N. Brandt
Publikováno v:
Applied Spectroscopy. 70:1150-1156
Analysis of the IR spectra of samples from 230 Russian oil paintings of the 20th century is used to propose a procedure for the threshold estimation of the age of paintings based on measured parameters (intensity ratios of spectral bands). The bands
Publikováno v:
Vibrational Spectroscopy. 106:103004
Raman spectroscopy is used to study components of an enzyme-catalyzed reaction. Time dependences of integral Raman intensities in the spectra of reaction mixtures are analyzed. Parameters of chymotrypsin-catalyzed reaction are determined, and the con
Publikováno v:
Applied Physics A. 117:1865-1871
Old paper samples are bleached using pulsed laser radiation with a wavelength of 532 nm. The ablation products of five paper samples that differ by composition and production dates are studied using Raman microspectroscopy. Cellulose, protein, calcit
Publikováno v:
Applied Spectroscopy. 68:495-501
Diagnostic methods and historical document and artwork (in particular, paper items) analysis using modern physical methods is a topical practical problem. Paper materials exhibit nonuniform degradation with the formation of foxing stains. Correct phy
Autor:
Nikolai N. Brandt, A.A. Mankova, Andrey Yu. Chikishev, Alexander P. Shkurinov, I.K. Sakodynskaya
Publikováno v:
Biomedical Spectroscopy and Imaging. 3:219-224
Publikováno v:
Chemical Physics Letters. 415:79-84
A chain of photoinduced transformations of a photosensitively labeled crown ether (p-azido-benzo-18-crown-6) is studied in organic solvent and water to estimate the radiation dozes needed for optimum binding of photolabel. Transient absorption spectr
Autor:
Andrey P. Razzhivin, Natal'ya R. Arutyunyan, Nikolai N. Brandt, Andrey Yu. Chikishev, Olga D. Parashchuk, Stepan I. Lebedenko
Publikováno v:
Fluctuation and Noise Letters. :L233-L241
The broadband background inherent in the Raman spectra of proteins is analyzed using a dual approach. Mathematical methods are used to eliminate the background signal that determines the noise contribution to the Raman spectra. Regularities in the ti
Publikováno v:
Journal of Molecular Structure. 648:177-182
Raman spectroscopy is employed to study tris-(hydroxymethyl)aminomethane and its complexes with 18-crown-6. The results obtained are used to interpret the known effect of α-chymotrypsin activation by crown ether in organic solvents. Raman spectra of
Publikováno v:
Journal of Biomedical Optics. 22:091509
Fourier transform infrared (FTIR) and Raman spectra of proteins with significantly different structures are measured in a spectral interval of 50 to 500 ?? cm ? 1 and noticeable spectral differences are revealed. Intensities of several spectral bands