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Upconversion time-stretch infrared spectroscopy [PDF]

open access: yesLight: Science & Applications, 2023
We develop upconversion time-stretch infrared spectroscopy, which enables high-speed and high-resolution broadband mid-infrared spectroscopy with over 1000 spectral elements at a rate of more than 10 MSpectra s−1.
Kazuki Hashimoto   +6 more
doaj   +2 more sources

Infrared Spectroscopy—Mid-infrared, Near-infrared, and Far-infrared/Terahertz Spectroscopy

open access: yesAnalytical Sciences, 2021
This article aims to overview infrared (IR) spectroscopy. Simultaneously, it outlines mid-infrared (MIR), near-infrared (NIR), and far-infrared (FIR) or terahertz (THz) spectroscopy separately, and compares them in terms of principles, characteristics, advantages, and applications.
Yukihiro Ozaki, Yukihiro Ozaki
openaire   +5 more sources

Near-infrared spectroscopy [PDF]

open access: yesJournal of Neuroanaesthesiology and Critical Care, 2015
Tissue ischaemia can be a significant contributor to increased morbidity and mortality. Conventional oxygenation monitoring modalities measure systemic oxygenation, but regional tissue oxygenation is not monitored.
Virendra Jain, Hari H Dash
doaj   +5 more sources

Optimum excitation wavelength and photon energy threshold for spintronic terahertz emission from Fe/Pt bilayer

open access: yesiScience, 2022
Summary: Terahertz emission from ferromagnetic/non-magnetic spintronic heterostructures had been demonstrated as pump wavelength-independent. We report, however, the pump wavelength dependence of terahertz emission from an optimized Fe/Pt spintronic ...
Valynn Katrine Mag-usara   +15 more
doaj   +1 more source

A Systematic Review of the Impact of Physical Exercise-Induced Increased Resting Cerebral Blood Flow on Cognitive Functions

open access: yesFrontiers in Aging Neuroscience, 2022
Brain perfusion declines with aging. Physical exercise represents a low-cost accessible form of intervention to increase cerebral blood flow; however, it remains unclear if exercise-induced amelioration of brain perfusion has any impact on cognition.
Maria B. Renke   +7 more
doaj   +1 more source

Nanostructure-enhanced infrared spectroscopy

open access: yesNanophotonics, 2021
While infrared spectroscopy is a powerful technique that provides molecular information such as chemical constituents and chemical structures of analytes, it suffers from low absorption cross-section resulting in low sensitivity and poor signal-to-noise ...
Tanaka Takuo, Yano Taka-aki, Kato Ryo
doaj   +1 more source

Infrared Spectroscopy–Quo Vadis?

open access: yesApplied Sciences, 2022
Given the exquisite capability of direct, non-destructive label-free sensing of molecular transitions, IR spectroscopy has become a ubiquitous and versatile analytical tool.
Michael Hlavatsch   +6 more
doaj   +1 more source

Shock Excitation in Narrow-line Regions Powered by AGN Outflows

open access: yesThe Astrophysical Journal, 2023
Outflows in an active galactic nucleus (AGN) are considered to play a key role in the evolution of the host galaxy through transfer of a large amount of energy.
Misaki Mizumoto   +12 more
doaj   +1 more source

H2S quartz-enhanced photoacoustic spectroscopy sensor employing a liquid-nitrogen-cooled THz quantum cascade laser operating in pulsed mode

open access: yesPhotoacoustics, 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   +1 more source

IR action spectroscopy of glycosaminoglycan oligosaccharides [PDF]

open access: yes, 2020
Glycosaminoglycans (GAGs) are a physio- and pharmacologically highly relevant class of complex saccharides, possessing a linear sequence and strongly acidic character.
Freyse, Joanna   +9 more
core   +2 more sources

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