scholarly journals Resonance Raman Spectra of Erythrocytes: Vibron Model

2018 ◽  
Vol 34 (5) ◽  
pp. 2671-2672
Author(s):  
J. Vijayasekhar
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Resonance Raman ◽  
Theoretical Method ◽  
Vibrational Modes ◽  
One Dimensional ◽  
Resonance Raman Spectra ◽  
The One

In this paper, vibrational spectra (infrared and Raman) of oxygenated and deoxynated functional erythrocytes are calculated using theoretical method “Vibron model” in the one-dimensional [U(2)] framework. The determined vibrational modes by Vibron model are compared with experimental data. It has been observed that results from the theoretical model reveal near to the exact, reliable with the experimental data.

Electronic and Resonance Raman Spectra of Some New Mixed-Valence Compounds of Pt and Pd with a Metal-Halide Chain

1980 ◽  
Vol 35 (6) ◽  
pp. 676-679 ◽  
Author(s):  
G. C. Papavassiliou ◽  
D. Layek
Keyword(s):  
Raman Spectra ◽  
Linear Chain ◽  
Mixed Valence ◽  
Resonance Raman ◽  
Chain Structure ◽  
One Dimensional ◽  
Resonance Raman Spectra ◽  
The One ◽  
Mixed Valence Compounds ◽  
Linear Chain Structure

Abstract The electronic and resonance Raman spectra of new mixed-valence compounds of the type M2ʹ[M(L)X3][M(L)X5], where Mʹ = K, NH4, M = Pt or Pd, L = NH3 or pyridine, and X = Cl, Br or I, have been studied. The single-crystal polarized reflectance spectra indicate the one-dimensional semiconductor behaviour. The polarized resonance Raman spectra confirm the --M(II)--X-M(IV)-X linear chain structure, which is in accordance with the X-ray results. The polarization of M-N bands can be explained by the Snyder's theory (1971).

The infrared, Raman, and resonance Raman spectra and normal coordinate analysis of methyl and ethyl dithioacetate

1982 ◽  
Vol 60 (2) ◽  
pp. 174-189 ◽  
Author(s):  
J. J. C. Teixeira-Dias ◽  
V. M. Jardim-Barreto ◽  
Y. Ozaki ◽  
A. C. Storer ◽  
P. R. Carey
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Resonance Raman ◽  
Normal Coordinate Analysis ◽  
Raman Intensity ◽  
Normal Coordinate ◽  
Intensity Enhancement ◽  
Strong Intensity ◽  
Resonance Raman Spectra ◽  
Absorbance Peak

Infrared, Raman, and resonance Raman data are reported for ethyl and methyl dithioacetate together with data for their isotopically substituted analogs: CD3C(=S)SCH3, CH3C(=S)SCD3, 13CH3C(=S)SCH3, CH313C(=S)SCH3, CD3C(=S)SCH2CH3, CH3C(=S)SCD2CH3, and CH313C(=S)SCH2CH3. Based on these data and a normal coordinate analysis of methyl dithioacetate, assignments are proposed for the majority of bands appearing in the vibrational spectra. Using excitation wavelengths in the 324–356 nm region strong intensity enhancement is observed for Raman bands near 1195, 1100, 730, and 580 cm−1 which are assigned to stretching motions of the CCSSC skeleton. Raman excitation profiles are reported for the 1197 and 581 cm−1 bands of ethyl dithioacetate and the electronic absorbance peak near 305 nm is identified as the source of resonance Raman intensity enhancement.

scholarly journals Identification of heme propionate vibrational modes in the resonance Raman spectra of cytochrome c oxidase

2009 ◽  
Vol 394 (1) ◽  
pp. 141-143 ◽  
Author(s):  
Tsuyoshi Egawa ◽  
Hyun Ju Lee ◽  
Hong Ji ◽  
Robert B. Gennis ◽  
Syun-Ru Yeh ◽  
...  
Keyword(s):  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Raman Spectra ◽  
Resonance Raman ◽  
Vibrational Modes ◽  
Resonance Raman Spectra

Effect of Cultural Conditions on Deep UV Resonance Raman Spectra of Bacteria

1993 ◽  
Vol 47 (12) ◽  
pp. 2145-2150 ◽  
Author(s):  
R. Manoharan ◽  
E. Ghiamati ◽  
S. Chadha ◽  
W. H. Nelson ◽  
J. F. Sperry
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Growth Time ◽  
Excitation Wavelength ◽  
Bacterial Cells ◽  
Cultural Effects ◽  
Resonance Raman Spectra ◽  
Molar Percent ◽  
The One ◽  
Cultural Media

Bacteria grown on trypticase soy agar (TSA), trypticase soy broth (TSB), and Davis minimal media, and harvested at times ranging from 4.5 to 48 h have been excited at 242.54 and 222.65 nm for the purpose of generating resonance Raman spectra. When excitation with 242.54-nm light occurs, simple spectra of tyrosine and tryptophan and various nucleic acids are observed. Large changes in the relative intensities of major nucleic acid peaks at 1485 and 1575 cm−1, on the one hand, as compared to a prominent protein tyrosine + tryptophan peak at 1616 cm−1, on the other, have been attributed to very large variations in the RNA content of bacterial cells from culture to culture. The spectral changes are observed whenever differences in growth rates or variations in cultural media result in substantial changes in the amount of ribosomal RNA. In spite of very large cultural effects on peak intensities it has been possible to obtain bacterial G + C/A + T ratios from these spectra. Specifically, the ratio of the intensity of the C (1530 cm−1) peak to the intensity of the A + G peak (1485 cm−1) when plotted against the known molar percent G + C of the corresponding bacterial DNA produces a straight line. Plots have been shown to be very nearly growth-time and media independent for fourteen different types of bacteria, which range in DNA G + C content from 32 to 66%. Spectra obtained with 222.65-nm light, in contrast with spectra obtained with 242.54-nm excitation, have been found to be nearly growth-rate and media independent. The excitation wavelength, 222.65 nm, appears to be the best yet found for use in rapid Raman identification of bacteria. All strong peaks which have been assigned have been attributed to protein modes. Relative intensities of 1556-cm−1 tryptophan and 1616-cm−1 tryptophan + tyrosine bands have been found to be strongly correlated with bacterial Gram type and nearly independent of cultural media or stage of growth.

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