Raman spectral studies of nucleic acids. XV. A Raman spectroscopic study of complexes of polylysine with deoxyribonucleic acid and polyriboadenylic acid

1976 ◽  
Vol 80 (11) ◽  
pp. 1164-1171 ◽  
Author(s):  
B. Prescott ◽  
C. H. Chou ◽  
G. J. Thomas
Keyword(s):  
Nucleic Acids ◽  
Spectroscopic Study ◽  
Deoxyribonucleic Acid ◽  
Spectral Studies ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Raman Spectral

FT-IR AND RAMAN SPECTROSCOPIC STUDY OF Cr2O3-TeO2-B2O3-SrF2 GLASSES

2006 ◽  
Vol 20 (18) ◽  
pp. 1107-1114 ◽  
Author(s):  
I. ARDELEAN ◽  
N. MUREŞAN ◽  
P. PǍŞCUŢǍ
Keyword(s):  
Spectroscopic Study ◽  
Local Structure ◽  
Glass System ◽  
Spectral Measurements ◽  
Structural Units ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Ft Ir ◽  
Raman Spectral ◽  
Ir And Raman

Homogeneous glasses were formed in the Cr 2 O 3- TeO 2- B 2 O 3- SrF 2 system, up to 20 mol% Cr 2 O 3. For these glasses, IR and Raman spectral measurements were carried out in order to elucidate the local structure. The results showed that BO 3 and BO 4 are the main structural units of the glass system and the chromium ions are located in the network. It was evidenced the presence of TeO 3 and TeO 4 units as possible structural units in our glasses.

scholarly journals Raman Spectroscopic Study of Coal Samples during Heating

2019 ◽  
Vol 9 (21) ◽  
pp. 4699 ◽  
Author(s):  
Yingfang Xie ◽  
Jinglin You ◽  
Liming Lu ◽  
Min Wang ◽  
Jian Wang
Keyword(s):  
High Temperature ◽  
Spectroscopic Study ◽  
Spectral Characteristics ◽  
Blue Shift ◽  
Carbonaceous Materials ◽  
Temperature Dependent ◽  
Spectral Parameters ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Raman Spectral

Raman spectroscopy can be used to record the characteristic spectra of carbonaceous materials. The D and G bands are the most popular and most important spectral characteristics when discussing carbonaceous materials. In this paper, a Raman spectroscopic study of different coals was first carried out using a 355 nm wavelength laser beam as an excitation source. The spectral parameters of the resultant spectra were evaluated and analyzed. Raman spectral characteristics of different kinds of coals were explored. The high temperature-dependent Raman spectra of the coals were further collected in a temperature range from 298 to 1473 K in order to investigate the transformations of the internal structure of the coals during the pyrolysis process. An abnormal blue shift of the G band occurred at moderate temperature (600–900 K), and the intensity of the G band became weaker at high temperatures, indicating pyrolysis and graphitization of the sample at moderate and high temperature, respectively.

Raman spectroscopic study of artificially twisted and non-twisted trilayer graphene

2021 ◽  
Vol 118 (13) ◽  
pp. 133101
Author(s):  
Sanghyun Kim ◽  
Donghyeon Lee ◽  
Binbin Wang ◽  
Shang-Jie Yu ◽  
Kenji Watanabe ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Trilayer Graphene

scholarly journals Hydrogen Bonds: Raman Spectroscopic Study

2021 ◽  
Vol 22 (10) ◽  
pp. 5380
Author(s):  
Boris A. Kolesov
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Spectroscopic Study ◽  
Raman Spectra ◽  
Temperature Region ◽  
Vibrational Frequency ◽  
Chemical Compounds ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Proton Dynamics

The work outlines general ideas on how the frequency and the intensity of proton vibrations of X–H×××Y hydrogen bonding are formed as the bond evolves from weak to maximally strong bonding. For this purpose, the Raman spectra of different chemical compounds with moderate, strong, and extremely strong hydrogen bonds were obtained in the temperature region of 5 K–300 K. The dependence of the proton vibrational frequency is schematically presented as a function of the rigidity of O-H×××O bonding. The problems of proton dynamics on tautomeric O–H···O bonds are considered. A brief description of the N–H···O and C–H···Y hydrogen bonds is given.

ChemInform Abstract: RAMAN SPECTROSCOPIC STUDY OF COBALT-MOLYBDENUM Γ-ALUMINA CATALYSTS

1978 ◽  
Vol 9 (40) ◽  
Author(s):  
J. MEDEMA ◽  
C. VAN STAM ◽  
V. H. J. DE BEER ◽  
A. J. A. KONINGS ◽  
D. C. KONINGSBERGER
Keyword(s):  
Spectroscopic Study ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Alumina Catalysts
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