Results 31 to 40 of about 840,200 (258)
Infrared and Raman Spectroscopy [PDF]
Journal of Biomedical Optics, 2005 This PDF file contains the editorial “Infrared and Raman Spectroscopy” for JBO Vol.
Andrew J. Berger +2 more
openaire +2 more sources
Upconversion time-stretch infrared spectroscopy [PDF]
arXiv, 2022 High-speed measurement confronts the extreme speed limit when the signal becomes comparable to the noise level. In the context of broadband mid-infrared spectroscopy, state-of-the-art ultrafast Fourier-transform infrared spectrometers, in particular dual-comb spectrometers, have improved the measurement rate up to a few Mspectra/s, which is limited by ...
arxiv
Infrared Spectroscopy of Be Stars [PDF]
Symposium - International Astronomical Union, 1994 FeII emission lines are present in a variety of astrophysical objects and, in particular, in Be stars, where in some situations they can also be seen in absorption. Selvelli & Araujo (1984) studied a sample of classical Be stars that have FeII emission lines in the optical region.
R. M. Torres +2 more
openaire +2 more sources
Photoacoustics, 2021 In this work, we report on a quartz-enhanced photoacoustic spectroscopy (QEPAS) sensor for hydrogen sulfide (H2S) detection, exploiting a liquid-nitrogen-cooled THz quantum cascade laser (QCL) operating in pulsed mode.
Angelo Sampaolo +12 more
doaj
Original plant traceability of Dendrobium species using multi-spectroscopy fusion and mathematical models [PDF]
Royal Society Open Science, 2019 Dendrobium is the largest genus of orchids most of which have excellent medicinal properties. Fresh stems of some species have been consumed in daily life by Asians for thousands of years.
Ye Wang +3 more
doaj +1 more source
AKARI Near-Infrared Spectroscopy of Luminous Infrared Galaxies
, 2012 We present the AKARI near-infrared (NIR; 2.5-5 micron) spectroscopic study of 36 (ultra)luminous infrared galaxies [(U)LIRGs] at z=0.01-0.4. We measure the NIR spectral features including the strengths of 3.3 micron polycyclic aromatic hydrocarbon (PAH ...
Abazajian +78 more
core +1 more source
Insight into Solvent Coordination of an Iron Porphyrin Hydroxylamine Complex from Spectroscopy and DFT Calculations [PDF]
, 2018 The reduction of Fe(OEP)(NO) in the presence of substituted phenols leads to a three‐electron reduction to form Fe(OEP)(NH2OH), which has been characterized by visible spectroscopy and electron stoichiometry.
Rahman, Md. Hafizur, Ryan, Michael D.
core +2 more sources
Quantum Fourier-transform infrared spectroscopy in the fingerprint region [PDF]
, 2021 Harnessing the quantum interference of photon-pair generation processes, infrared quantum absorption spectroscopy (IRQAS) can extract the infrared optical properties of a sample through visible or near-infrared photon detection without the need for an infrared optical source or detector, which has been an obstacle for higher sensitivity and ...
arxiv +1 more source
Following Enzyme Activity with Infrared Spectroscopy
Sensors, 2010 Fourier transform infrared (FTIR) spectroscopy provides a direct, "on-line" monitor of enzymatic reactions. Measurement of enzymatic activity is based on the fact that the infrared spectra of reactants and products of an enzymatic reaction are usually ...
Saroj Kumar, Andreas Barth
doaj +1 more source
Frontiers in Chemistry, 2020 A new photocatalyst denoted as mTHPC/pCN was prepared by modifying protonated graphitic carbon nitride (pCN) by meso-tetrahydroxyphenylchlorin (mTHPC). Relevant samples were characterized via various methods including zeta potential measurements, X-ray ...
Yanfei Liu, Zhen Ma, Zhen Ma
doaj +1 more source