Results 11 to 20 of about 1,339,901 (286)

Applications of Terahertz Spectroscopy in the Detection and Recognition of Substances

open access: yesFrontiers in Physics, 2022
Recently, terahertz spectroscopy has received a lot of attention because of its unique properties such as biosafety, fingerprint spectrum, and good penetration.
Xiaojian Fu   +6 more
doaj   +3 more sources

Recent Developments and Applications of Terahertz Spectroscopy in Food Analysis [PDF]

open access: yesBiosensors
The terahertz waves are electromagnetic waves with frequencies ranging from 0.1 to 10 THz, exhibiting characteristics of both microwave and infrared, including fingerprint characteristics, coherence, and safety.
Pengpeng Yu   +5 more
doaj   +2 more sources

Terahertz spectroscopy study of oridonin and ponicidin in the anticancer Chinese herbal medicine Rabdosia rubescens [PDF]

open access: yesFrontiers in Plant Science
Rabdosia rubescens, a Chinese herbal medicine with anticancer properties, contains two active ingredients: oridonin and ponicidin. Both compounds exhibit antitumor effects by inducing tumor cell apoptosis and autophagy and inhibiting tumor cell ...
Yang Gao   +33 more
doaj   +2 more sources

Detection of tomato water stress based on terahertz spectroscopy [PDF]

open access: yesFrontiers in Plant Science, 2023
China’s tomato cultivation area is nearly 15 thousand km2, and its annual tomato output is about 55 million tons, accounting for 7% of its total vegetable production.
Yixue Zhang   +4 more
doaj   +2 more sources

Coherent two-dimensional terahertz-terahertz-Raman spectroscopy [PDF]

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2016
Significance The thermally populated motions of liquids, including hydrogen bonds, low-energy bending vibrations, conformational torsions, and hindered rotations, are resonant in the terahertz region of the spectrum. These motions regulate solvation, macromolecular structure, and vibrational energy flow in liquid-phase chemistry.
Ralph Welsch   +2 more
exaly   +4 more sources

Terahertz spectroscopy: The renaissance of far infrared spectroscopy

open access: yesJournal of Molecular Structure, 2010
This article does not attempt to offer an exhaustive assessment of the current status of terahertz technology, nor does it endeavour to cover all the anticipated applications of terahertz science, rather it is an attempt to raise the awareness of this tool among those molecular spectroscopists who may not yet have considered the emerging opportunities ...
Henry H Mantsch, Dieter Naumann
exaly   +3 more sources

Optoelectronic frequency-modulated continuous-wave terahertz spectroscopy with 4 THz bandwidth

open access: yesNature Communications, 2021
Time-domain spectroscopy with terahertz frequencies typically requires complex and bulky systems. Here, the authors present an opto-electronics-based, frequency-domain terahertz sensing technique which offers competitive measurement performance in a much
Lars Liebermeister   +7 more
doaj   +2 more sources

Accurate determination of terahertz optical constants by vector network analyzer of Fabry-Perot response [PDF]

open access: yes, 2013
This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OL.38.005438.
Wang, X   +4 more
core   +5 more sources

A Novel Method for the Enhancement of Composite Materials’ Terahertz Image Using Unsharp Masking and Guided Filtering Technology

open access: yesFrontiers in Physics, 2021
When terahertz imaging technology is used for the nondestructive testing of composite materials, the signal is often affected by the experimental environment and internal noise of the system, as well as the absorption and scattering effect of the tested ...
Zhilong Li   +8 more
doaj   +1 more source

Layer-Resolving Terahertz Light-Field Imaging Based on Angular Intensity Filtering Method

open access: yesSensors, 2021
Terahertz focal plane array imaging methods, direct camera imaging and conventional light field imaging methods are incapable of resolving and separating layers of multilayer objects.
Nanfang Lyu   +3 more
doaj   +1 more source

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