photoacoustic spectroscopy (PAS)
Evaluating biases in filter-based aerosol absorption measurements using photoacoustic spectroscopy
... to photoacoustic spectroscopy (PAS) measurements for aerosols over the Gulf of Mexico, which included BC, nitrate, sulfate and organic aerosols from shipping emis- ...
18
Rapid estimation of sugar release from winter wheat straw during bioethanol production using FTIR-photoacoustic spectroscopy
... infrared photoacoustic spectroscopy (FTIR-PAS) was combined with advanced chemometrics to develop calibration models predicting the amount of sugars released after pretreatment and enzymatic hydrolysis of ...
12
Enhanced photoacoustic spectroscopy sensitivity through intra-cavity OPO excitation
... of photoacoustic spectroscopy (PAS) operated within the cavity of a continuous-wave, intra-cavity Optical Parametric Oscillator ...the photoacoustic effect, conferring orders-of-magnitude improvement ...
8
Quantitative evaluation of broadband photoacoustic spectroscopy in the infrared with an optical parametric oscillator
... Abstract: Photoacoustic spectroscopy allows the identification of specific molecules in gases. We evaluate the spectral resolution and detection limits for a PAS system in the broadband infrared wavelength ...
29
A 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases
... Photoacoustic spectroscopy (PAS) has been continually developed as a measurement tool for trace gas detection since its discovery by Bell in 1880 ...laser spectroscopy, the advantages of PAS include ...
5
Rapid diagnosis of nitrogen status in rice based on Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS)
... red photoacoustic spectroscopy (FTIR-PAS) has been effectively applied in many fields, such as analyzing soil physical and chemical properties [12, 13], identifica- tion of plant diseases [14], gas ...
10
Depth profiling of weathered tropical wood using Fourier transform infrared photoacoustic spectroscopy
... infrared photoacoustic spectroscopy (FTIR-PAS) was carried out to obtain information on the chemical changes caused by ...the photoacoustic probing depth during relatively short weathering ...
6
Phase References and Cell Effects in Photoacoustic Spectroscopy
... (FT-IR) photoacoustic spectroscopy, advanced scanning and data-handling techniques have placed increasing emphasis on the phase of the photoacoustic ...
10
Diode laser photoacoustic spectroscopy of CO2, H2S and O2 in a differential Helmholtz resonator for trace gas analysis in the biosciences and petrochemistry
... absorption spectroscopy [32, ...a photoacoustic scheme, however, are (i) convenience and lower costs; near-IR laser sources and detectors are in general much less than one tenth of the costs of a comparable ...
12
Practical analysis of polymers with depth varying compositions using Fourier transform infrared photoacoustic spectroscopy (plenary)
... FTIR PAS is ideally suited for depth analysis because of the role of thermal waves in photoacoustic signal generation. Their short and externally controllable decay distances within the sample determine the layer ...
9
Rapid Analysis of Wood Using Transient Infrared Spectroscopy and Photoacoustic Spectroscopy with PLS Regression Stanley J. Bajic
... In the forest products industry, improved methods are needed for rapid analysis of wood and paper products. Currently, the best methods for determining chemical and physical properties of wood-based materials require ...
7
Cavity-enhanced raman and helmholtz resonator photoacoustic spectroscopy to monitor the mixed sugar metabolism of E. coli
... The headspace above bacterial cultures is analyzed by Raman (CERS) or diode laser photoacoustic (DHR) spectroscopy. The CERS setup has been described in detail before. 21,23,24 Here, we provide a brief ...
10
Photoacoustic Detection in the Michelson Interferometer Cavity
... report photoacoustic (PA) signal detection in a cell placed within the Mi- chelson interferometer cavity in an attempt to relate photoacoustic effect to the Michelson fringe shift as a result of changes in ...
11
Detecting Photoacoustic Signals of Sulfur Hexafluoride at Varying Microphone Positions
... Photoacoustic spectroscopy was used to test the photoacoustic properties of sulfur hexafluoride, an optically thick and potent greenhouse ...the photoacoustic effect of sulfur hexafluoride, ...
5
Resonator probe for photoacoustic measurement
... of photoacoustic spectroscopy lay dormant for more than five decades following Bell’s initial ...used photoacoustic spectroscopy to produce a quantitative analysis of gas concentration in a ...
96
Photoacoustic Imaging with a Line Focus Laser Beam for Rapid Inspection and Tomographic Characterization of Simulated Surface and Undersurface Defects
... In photoacoustic spectroscopy, the PA signal in opaque solids (including metals) is generally propor- tional to the product of the absorption coefficient α of the specimen (assuming that the surface defect ...
8
Pulsed Laser Generation and Optical Fibre Detection of Thermoelastic Waves in Arterial Tissue
... pulsed photoacoustic spectroscopy and the feasibility of its practical in vivo implementation via the concept of the photoacoustic ...that photoacoustic spectroscopy can be used to ...
192
Principal Longevity, Leadership Behaviors, and Student Academic Achievement
... In spite of several technological advantages of III-V Nitride MEMS, of which a microcantilever is a simple example, only a handful of studies have been reported on their deflection characterization in static mode and ...
222
Photoacoustic Tomography for Finger Joint Imaging: Tackling Artefacts
... the photoacoustic images has proven to be chal- ...the photoacoustic images arise due to acoustic pressures waves from blood vessels scattering and reflecting on the bone ...the photoacoustic image ...
82
Potential for Photoacoustic Imaging of Neonatal Brain
... Recently, photoacoustic tomography through a human adult cadaver skull was investigated ...[48]. Photoacoustic tomography of a canine brain cortex through the whole human skull was ...
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