Results 291 to 300 of about 908,256 (325)
Some of the next articles are maybe not open access.
Multiscattering-Enhanced Absorption Spectroscopy
Analytical Chemistry, 2015An original scheme for sensitive absorption measurements, particularly well-suited for low analyte concentrations, is presented. The technique is based on multiscattering-enhanced absorption spectroscopy (MEAS) and benefits from the advantages of conventional absorption spectroscopy: simplicity, rapidity, and low costs.
V. Koman, C. Santschi, O. J. F. Martin
openaire +2 more sources
Concentration modulated absorption spectroscopy
Journal of Molecular Structure, 1985Concentration modulation is demonstrated to be a technique capable of markedly extending sensitivity limits in absorption spectroscopy. The gain generated relates in such a manner to sample transmittance that for the first reported time direct spectroscopic concentration measurements become possible.
A J, Langley +4 more
openaire +2 more sources
Photothermal aerosol absorption spectroscopy
Applied Optics, 1985In situ aerosol absorption spectroscopy was performed using three photothermal detection schemes: phase fluctuation optical heterodyne spectroscopy, photothermal modulation of Mie scattering, and photophoresis. Particle specific absorption data of ammonium sulfate aerosols were obtained.
H B, Lin, A J, Campillo
openaire +2 more sources
2011
X-ray absorption spectroscopy (XAS) involves the excitation of core electrons to bound states localized on the photoabsorber and the eventual excitation of the photoelectron to the continuum. The resulting spectra are typically divided into two regions: (1) the edge region which provides electronic structure information and (2) the extended X-ray ...
openaire +2 more sources
X-ray absorption spectroscopy (XAS) involves the excitation of core electrons to bound states localized on the photoabsorber and the eventual excitation of the photoelectron to the continuum. The resulting spectra are typically divided into two regions: (1) the edge region which provides electronic structure information and (2) the extended X-ray ...
openaire +2 more sources
Transient absorption spectroscopy
2022Die optischen Eigenschaften von organischen Farbstoffen und optisch aktiven anorganischen Molek len werden durch ihre chemische Struktur, ihrer chemischer Umgebung, und durch das Verhalten ihrer angeregten Zust nde bestimmt. Die klassischen Methoden zur Untersuchung dieser Eigenschaften sind die Absorptions- und Lumineszenzspektroskopie. Obwohl beide
openaire +1 more source
Atomic Absorption Spectroscopy
Analytical Chemistry, 1960To monitor the internal state of the cuvette in an atomic absorption spectrometer, a video camera (16) is arranged to be capable of viewing the inside of a cuvette 10 within its sample furnace 2. Retractable mirrors M4 and M8, which are insertable simultaneously in the measurement path 7 to direct the radiation around the cuvette and along a reference ...
openaire +1 more source
Photoacoustic X-Ray Absorption Spectroscopy
1988When materials are irradiated by X-rays, several effects occur, e. g. absorption, scattering, fluorescence, and electron release, as seen in Fig. 1. Heat generation should also be observed on absorption of electromagnetic waves even for the X-ray absorption process.
openaire +1 more source
Bioacoustic Absorption Spectroscopy
1999Abstract : Demonstrate the potential of bioacoustic absorption spectroscopy for tomographic mapping of the bioacoustic parameters of fish with swim bladders in shallow water.
openaire +1 more source