Results 281 to 290 of about 1,032,914 (333)
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FT-IR microspectroscopy for microbiological studies
Journal of Microbiological Methods, 2000In this article we present an infrared microspectroscopic investigation on Candida albicans microcolonies, taken as a model system for studies on other microorganisms. Excellent Fourier transform infrared (FT-IR) absorption spectra from 4000 to 850 cm(-1) have been collected in only 20 s from sampling areas of 100x100 microm(2) in microcolonies, which ...
F. Orsini +5 more
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FT-IR spectra of inorganic borohydrides
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2014Inorganic compounds with BH4(-) ions are the subject of many recent investigations in the context of potential hydrogen storage materials. In this work, Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectra of a series of reference and research compounds (including deuterated samples) are collected and made available to the ...
D'Anna Vincenza +3 more
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Microbiological characterizations by FT-IR spectroscopy
Nature, 1991Infrared signals of microorganisms are highly specific fingerprint-like patterns that can be used for probing the identity of microorganisms. The simplicity and versatility of Fourier-transform infrared spectroscopy (FT-IR) makes it a versatile technique for rapid differentiation, classification, identification and large-scale screening at the ...
D, Naumann, D, Helm, H, Labischinski
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Sample Analysis through the use of Centrifugal-Vacuum FT-IR (CV/FT-IR)
Applied Spectroscopy, 1989Sample preparation is currently considered an important bottleneck in the analysis of large numbers of samples by FT-IR spectroscopy. For aqueous or alcohol solutions, because of the very strong solvent absorptions over large regions of the infrared spectrum, extraction of the analyte from solution is often necessary prior to measurement of the ...
Steven Barnett, Ashraf A. Ismail
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MAGIC-LC/FT-IR: A viable interface for HPLC and FT-IR spectrometry
Microchemical Journal, 1989Abstract The interfacing of separation methods with selective detectors has been a long sought after goal. In some instances, such as gas chromatography interfaced with spectrometric methods such as mass spectrometry or Fourier transform infrared spectrometry, considerable success has been achieved. Interfaces with liquid chromatography have been far
James A. de Haseth, Raymond M. Robertson
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A Comparison of FT-IR/PA and FT-IR/PBD Spectra of Powders
Applied Spectroscopy, 1986FT-IR photoacoustic (PA) and also photothermal beam deflection (PBD) spectra were recorded with the same particulate samples (graphite, charcoal, aspirin, and silica) under the same conditions in order to compare the quality of the spectra obtainable with the two techniques.
P. G. Varlashkin +3 more
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Applied Spectroscopy, 1992
The lignin content of pulp is determined from its diffuse reflectance infrared spectrum by an algorithm that calculates the degree of overlap between two spectra. The lignin:cellulose fraction correlates with kappa number, a titrimetric measure of lignin.
Michael A. Friese, Sujit Banerjee
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The lignin content of pulp is determined from its diffuse reflectance infrared spectrum by an algorithm that calculates the degree of overlap between two spectra. The lignin:cellulose fraction correlates with kappa number, a titrimetric measure of lignin.
Michael A. Friese, Sujit Banerjee
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Universal on-line HPLC/FT-IR and GC/FT-IR direct deposition interface
AIP Conference Proceedings, 1998On-line micro- and semimicro-HPLC/FT-IR interfaces have been developed in our laboratory. These interfaces involve thermospray nebulization of the HPLC effluent and a modification of the Bio-Rad Tracer direct deposition GC/FT-IR interface. The detection limits for on-line narrow-bore HPLC/FT-IR measurements are at the low nanogram level.
Lin-Tao He, Peter R. Griffiths
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Applied Spectroscopy, 2018
Bone mineral crystallinity is an important factor determining bone quality and strength. The gold standard method to quantify crystallinity is X-ray diffraction (XRD), but vibrational spectroscopic methods present powerful alternatives to evaluate a ...
W. Querido +3 more
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Bone mineral crystallinity is an important factor determining bone quality and strength. The gold standard method to quantify crystallinity is X-ray diffraction (XRD), but vibrational spectroscopic methods present powerful alternatives to evaluate a ...
W. Querido +3 more
semanticscholar +1 more source
Microchimica Acta, 1988
The development of a new high performance liquid chromatography (HPLC) interface with Fourier transform infrared (FT-IR) spectrometry is currently being studied. This interface removes HPLC solvents prior to infrared detection. The solvent elimination properties of this interface make it possible to obtain spectra from reverse phase chromatography with
Raymond M. Robertson +2 more
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The development of a new high performance liquid chromatography (HPLC) interface with Fourier transform infrared (FT-IR) spectrometry is currently being studied. This interface removes HPLC solvents prior to infrared detection. The solvent elimination properties of this interface make it possible to obtain spectra from reverse phase chromatography with
Raymond M. Robertson +2 more
openaire +1 more source