Results 11 to 20 of about 370,117 (207)

Validation of the near infrared spectroscopy method for determining soil organic carbon by employing a proficiency assay for fertility laboratories [PDF]

open access: yes, 2021
Current research indicates that near infrared (NIR) spectroscopy is the most promising alternative technique for the determination of soil organic carbon (SOC) in laboratories worldwide and that it may serve as a total or partial replacement for the ...
Valderrama, Patrícia   +6 more
core   +2 more sources

Near infrared spectroscopy

open access: yesBritish Journal of Anaesthesia, 1999
Near-infrared spectroscopy (NIRS) is a relatively new technology that offers the enormous advantage of making measurements in vivo of changes in cerebral hemodynamics and oxygenation. Because NIRS is noninvasive and portable, it can provide real-time measurements of these changes at the bedside.
H, Owen-Reece   +3 more
openaire   +3 more sources

Near-infrared laser spectroscopy of NiI [PDF]

open access: yesThe Journal of Chemical Physics, 2004
Laser-induced fluorescence spectrum of NiI in the near infrared region of 714–770 nm has been recorded. Seven bands belonging to three electronic transition systems were observed and analyzed: the (0,0), (1,0), and (2,0) bands of [13.3] 2Σ+-A 2Π3/2 system; the (1,1) and (0,1) bands of [13.9] 2Π3/2-X 2Δ5/2 system; and the (0,0) and (1,0) bands of [13.9] 
Ye, J, Tam, WS, Cheung, ASC
openaire   +5 more sources

The use of near infrared (NIR) spectroscopy to improve soil mapping at the farm scale [PDF]

open access: yes, 2008
The creation of fine resolution soil maps is hampered by the increasing costs associated with conventional laboratory analyses of soil. In this study, near infrared (NIR) reflectance spectroscopy was used to reduce the number of conventional soil ...
Söderström, Mats   +2 more
core   +1 more source

Portable high-end instrument for in-vivo infrared spectroscopy using spread spectrum modulation [PDF]

open access: yes, 2004
Near infrared spectroscopy (NIRS) can be employed to monitor noninvasively and continuously local changes in hemodynamics and oxygenation of human tissues.
Trevisan, S.   +4 more
core   +1 more source

Towards Commoditised Near Infrared Spectroscopy [PDF]

open access: yesProceedings of the 2017 Conference on Designing Interactive Systems, 2017
Near Infrared Spectroscopy (NIRS) is a sensing technique in which near infrared light is transmitted into a sample, followed by light absorbance measurements at various wavelengths. This technique enables the inference of the inner chemical composition of the scanned sample, and therefore can be used to identify or classify objects.
Simon Klakegg   +5 more
openaire   +2 more sources

Noncooled near-infrared spectroscopy [PDF]

open access: yesSPIE Proceedings, 1998
We investigate the use of non-cryogenic instrumentation for near IR spectroscopy. With this technique, it is possible to apply in the J and H bands some instrument concepts and observing techniques used in the visible. We present observations of the thermal background in H. We derive some instrument requirements for minimizing and handling it.
Dallier, Richard, Cuby, Jean-Gabriel
openaire   +2 more sources

Fourier transform infrared spectroscopy for analysis of kidney stones [PDF]

open access: yesInvestigative and Clinical Urology, 2018
Purpose: To compare the results of a chemical method of kidney stone analysis with the results of Fourier transform infrared (FT-IR) spectroscopy. Materials and Methods: Kidney stones collected between June and October 2015 were simultaneously analyzed ...
Aysha Habib Khan   +3 more
doaj   +1 more source

Near infrared reflectance spectroscopy compared with soil clay and organic matter content for estimating within-field variation in N uptake in cereals [PDF]

open access: yes, 2008
Adjusting fertiliser applications to within-field variations in nitrogen (N) mineralisation during the growing season can increase yields, improve crop quality, reduce costs and decrease nutrient losses to the environment. Predicting such variations at a
Stenberg, Bo   +2 more
core   +1 more source

Breakthrough Potential in Near-Infrared Spectroscopy: Spectra Simulation. A Review of Recent Developments

open access: yesFrontiers in Chemistry, 2019
Near-infrared (12,500–4,000 cm−1; 800–2,500 nm) spectroscopy is the hallmark for one of the most rapidly advancing analytical techniques over the last few decades.
Krzysztof B. Beć, Christian W. Huck
doaj   +1 more source

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