Results 261 to 270 of about 17,706 (286)

Quantitative analysis of mannitol polymorphs. FT-Raman spectroscopy

Journal of Pharmaceutical and Biomedical Analysis, 2002
Mannitol is a polymorphic excipient which is usually used in pharmaceutical products as the beta form, although other polymorphs (alpha and delta) are common contaminants. Binary mixtures containing beta and delta mannitol were prepared to quantify the concentration of the beta form using FT-Raman spectroscopy.
Sarra N, Campbell Roberts, Adrian C, Williams, Ian M, Grimsey, Steven W, Booth   +3 more
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Biomolecular Investigations Using FT-Raman Spectroscopy

1997
This paper discusses the application of FT-Raman spectrometry for investigating different biologically important molecules such as amino acids and proteins in both the solid and native states. The utility of FT-Raman spectroscopy for examining structural changes in biomolecules, resulting from environmental changes such as pH, temperature and chemical ...
Prashant S. Bhandare, Robert Jakobsen, K. Krishnan   +2 more
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FTIR and FT Raman Spectra of B6O

Journal of Solid State Chemistry, 1997
Abstract The IR active phonon spectrum of B 6 O is typical for the α -rhombohedral boron structure group. The number of phonons corresponds exactly to that predicted by group theory. The phonon bands in the spectrum are weakly damped, indicating that the structure is largely undistorted.
H. Werheit, U. Kuhlmann
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Breast cancer diagnosis using FT-RAMAN spectroscopy

SPIE Proceedings, 2005
In this study FT-RAMAN spectra of breast tissue from 35 patients were obtained and separated into nine groups for histopathologic analysis, which are as follows: normal breast tissue, fibrocystic condition, in situ ductal carcinoma, in situ ductal carcinoma with necrosis, infiltrate ductal carcinoma, infiltrate inflammatory ductal carcinoma, infiltrate
Renata A. Bitar, Airton A. Martin, Carlos J. T. Criollo, Leandra N. Z. Ramalho   +3 more
openaire   +1 more source

Characterization of biomaterials using FT-Raman spectroscopy

AIP Conference Proceedings, 1998
Carbohydrates play an important role in the quality and preservation of pharmaceutical and food materials. The storage temperature and water content is very critical in storage and, therefore, it is very important to understand how the physical state of carbohydrates is affected by water.
S. Söderholm, Y. H. Roos, N. Meinander, M. Hotokka   +3 more
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FT Raman spectroscopy of Norway spruce needles

SPIE Proceedings, 2001
12 Norway spruce [Picea abies (L.) Karst.] needles represent a very useful bioindicator of the air pollution. They serve not only as natural samplers of the pollutants but micromorphology of the epistomatal area can be directly correlated with an environmental stress.
P. Matejka, L. Pleserova, G. Budinova, K. Havirova, J. Nahlik, F. Skacel, Karel Volka   +6 more
openaire   +1 more source

FT Raman Spectroscopy of Some Metal Hexaborides

Journal of Solid State Chemistry, 1997
Abstract Fourier-transform Raman (FT) spectra of single-crystal LaB 6 and SmB 6 and of sintered EuB 6− X C X ( X ≈0.1) were measured at room temperature. For excitation a Nd:YAG laser with about 2 W irradiation power was used. The spectra exhibited many more details of the phonon densities of states than those obtained with conventional Raman ...
Schmechel, Roland, Werheit, Helmut, Paderno, Yu B.   +2 more
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FT-Raman Spectroscopy of Modified Tetraisopropyltitanate Hydrolysates

1997
Modification of metal alkoxides with complexing agents, such as carboxylic acids, which act both as a catalyst and a ligand, is commonly used in sol-gel processing to alter the hydrolysis and condensation rates of the alkoxide. Hydrolysates produced by the reaction of modified tetraisopropyltitanate with water were X-ray-amorphous but exhibited spectra
Paul A. Venz, Ray L. Frost, John R. Bartlett, James L. Woolfrey, Lisa W. Y. Wong, Sandra M. Dutt   +5 more
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NIR-FT-Raman Spectra of Some Proteins

1993
NIR-FT-Raman spectroscopy is today widely used in studies of biologically interesting molecules. Using this technique the fluorescence observed with visible excitation is avoided. This is of particular importance for biological polymers where unavoidable impurities often give rise to intense broad backgrounds with Ar-ion laser excitation.
Christensen, Daniel H., Colaianni, Susan E., Nielsen, Ole Faurskov   +2 more
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FT-Raman Microscopy: Discussion and Preliminary Results

Applied Spectroscopy, 1989
This paper reports on the first spectra obtained using a microscope apparatus to perform FT-Raman spectroscopy. It is considered desirable to use a standard FT-IR microscope for these measurements, since this approach may lead to the attainment of both FT-IR and FT-Raman microscope data from a single instrument.
Robert G. Messerschmidt, D. Bruce Chase
openaire   +1 more source