Results 271 to 280 of about 1,064,285 (340)

Infrared spectrophotometry of OH 231.8 + 4.2 identified with OH 0739-14

, 1976
Infrared spectrophotometry from 2.1 to 4.1 microns and from 7.7 to 13.3 microns of the peculiar OH maser source OH 231.8 + 4.2 identified with OH 0739-14 is reported.
F. Gillett, B. Soifer
semanticscholar   +1 more source

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

Studies of Cryptococcus Polysaccharides by Infrared Spectrophotometry

Journal of Infectious Diseases, 1959
Infrared spectrums of isolated capsular polysaccharides have been used to segregate types within certain groups of encapsulated bacteria. The results of spectral typing of purified pneumococcal polysaccharides (1) and of crude klebsiella polysaccharides (2) have paralleled the results of serological typing.
Seymour Levine, Paul W. Kabler, Edward E. Evans   +2 more
openaire   +3 more sources

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
openaire   +3 more sources

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.
openaire   +2 more sources

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 ...
openaire   +2 more sources

ANALYSIS OF CARBOXYL GROUPS IN SOIL HUMIC ACIDS BY A WET CHEMICAL METHOD, FOURIER-TRANSFORM INFRARED SPECTROPHOTOMETRY, AND SOLUTION-STATE CARBON-13 NUCLEAR MAGNETIC RESONANCE. A COMPARATIVE STUDY

, 1997
Carboxyls are important functional groups that affect polarity and reactivity in humic acids (HAs). Carboxyls were analyzed in eight soil HAs by three methods based on widely differing principles: (i) wet chemical analysis, (ii) Fourier-Transform ...
L. Celi, M. Schnitzer, M. Négre
semanticscholar   +1 more source

Near-infrared spectrophotometry of Titan

Icarus, 1975
Several unusual features in the near-IR spectrum of Titan are examined. Observations during four apparitions establish the reality of the S(1) absorption at 8150.7 A, but the existence of the S(O) absorption at 8272.7 A will require further sightings to become definitively established. These two features are particularly important, as they bear on the
openaire   +2 more sources

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
openaire   +2 more sources

Infrared and ultraviolet spectrophotometry in residue evaluations

1964
In order to begin this discussion of infrared and ultraviolet spectrophotometry in residue evaluations, it is important to discuss briefly the broad field of spectrophotometry and to define the various regions of the electromagnetic spectrum of interest.
openaire   +3 more sources