Results 261 to 270 of about 1,105,025 (337)

Quantitative Determination of Fluconazole by Infrared Spectrophotometry

Analytical Letters, 1996
Abstract The purpose of the study was the quantitative determination of fluconazole by IR spectrophotometry which was realized by the application of the KBr disc technique. In this study dehydrocholic acid was used as internal standard. The absorption bands at 960 and 675 cm−1 were chosen for fluconazole and 1705 cm−1 for dehydrocholic acid.
Atay, O, Selcuk, F
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Near-Infrared Spectrophotometry

Applied Spectroscopy Reviews, 1968
Abstract Near-infrared spectroscopy is usually considered to cover that part of the electromagnetic spectrum which falls between 0.71μ. and approximately 3 p. From the theoretical viewpoint, one might place the upper wavelength limit near 2.51μ. and define near-infrared spectroscopy as the study of low-energy electronic transitions and overtones and ...
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Identification of Elastomers by Infrared Spectrophotometry

Rubber Chemistry and Technology, 1963
Abstract The use of infrared spectrophotometry for the identification of elastomers is discussed, after having reviewed the general principles on which spectrophotometry is based and after having considered the principal types of atomic vibration. There follows a description of the principal methods of analysis for solution and pyrolysis,
Aldo Fiorenza, Giuseppe Bonomi
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For infrared spectrophotometry of Jupiter and Saturn

Icarus, 1978
Infrared spectral measurements of Mars, Jupiter, and Saturn were obtained from 100 to 470 kaysers and, by taking Mars as a calibration source, brightness temperatures of Jupiter and Saturn were determined with approximately 5 kayser resolution. Internal luminosities were determined from the data and are reported to be approximately 8 times 10 to the ...
David Goorvitch, J.P. Simpson, E. F. Erickson, D. W. Strecker   +3 more
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Quantitative Analysis by Infrared Spectrophotometry

Applied Spectroscopy Reviews, 1970
Abstract To complement some current references [1,2] on quantitative infrared analysis, the following goals have been set for this paper: To assess the recent history of quantitative infrared analysis. To describe and illustrate instrumentation and techniques for measuring infrared absorbance simply but precisely.
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Simultaneous Determination of Moisture, Organic Carbon, and Total Nitrogen by Near Infrared Reflectance Spectrophotometry

, 1986
Near infrared diffuse reflectance spectrophotometry, within the wavelength range 1100 to 2500 nm, was investigated for use in the simultaneous prediction of the moisture, organic C, and total N contents of air-dried soils. An infraAlyzer 500 C (Technicon
R. Dalal, R. Henry
semanticscholar   +1 more source

Near-infrared spectrophotometry determined brain oxygenation during fainting.

Acta Physiologica Scandinavica, 1998
During orthostatic hypotension we evaluated whether presyncopal symptoms relate to a reduced brain oxygenation. Nine subjects performed 50 degrees head-up tilt for 1 h and eight subjects were followed during 2 h of supine rest and during 1 h of 10 ...
P. Madsen, F. Pott, S. B. Olsen, H. Nielsen, I. Burcev, N. Secher   +5 more
semanticscholar   +1 more source

Near-Infrared Spectrophotometry

1993
Light absorption in tissue is very limited in the near-infrared range; thus brain tissue may be transilluminated effectively using standard technology. Measurements of brain oxygenation and circulation can be obtained at the cotside. Although the techniques are still under development and the application in newborn infants is still limited, the use of ...
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Optimizing cerebral oxygenation during cardiac surgery: a review of experimental and clinical investigations with near infrared spectrophotometry.

The thoracic and cardiovascular surgeon, 2000
OBJECTIVES Near-infrared spectrophotometry (NIRS) is a promising method for non-invasive monitoring of cerebral oxygenation and hemodynamics. This paper reviews studies in which we aimed to validate NIRS in an experimental model of cardiopulmonary bypass
G. Nollert, Richard A. Jonas, B. Reichart   +2 more
semanticscholar   +1 more source

Some problems in infrared spectrophotometry

Journal of Molecular Structure, 1973
Abstract : It is well known that infrared intensity measurements are not very accurate. Nevertheless modern infrared spectrophotometers do exhibit good reproducibility, at least over small time intervals. Failure to obtain closer inter-laboratory agreement must result from systematic instrumental errors and faulty experimental technique.
R.P. Young, J.P. Hawranek, R.N. Jones, P. Neelakantan, D. Escolar   +4 more
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