Hydrogen-bond studies of thin film water using near-infrared spectroscopy in the 970 nm spectral region

2002 ◽  
Vol 187 (3-4) ◽  
pp. 261-265 ◽  
Author(s):  
Takayuki Suzuki
Keyword(s):  
Thin Film ◽  
Hydrogen Bond ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Spectral Region ◽  
Near Infrared

scholarly journals Direct constraints on the impact of TP-AGB stars on the SED of galaxies from near-infrared spectroscopy

2011 ◽  
Vol 7 (S284) ◽  
pp. 63-65 ◽  
Author(s):  
Stefano Zibetti ◽  
Anna Gallazzi ◽  
Stéphane Charlot ◽  
Anna Pasquali ◽  
Daniele Pierini
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Spectral Region ◽  
Stellar Population ◽  
Near Infrared ◽  
Agb Stars ◽  
Population Synthesis ◽  
Stellar Population Synthesis ◽  
Evolutionary Phase ◽  
The Impact

AbstractWe present new spectro-photometric NIR observations of 16 post-starburst galaxies especially designed to test for the presence of strong carbon features of thermally pulsing AGB (TP-AGB) stars, as predicted by recent models of stellar population synthesis. Selection based on clear spectroscopic optical features indicating the strong predominance of stellar populations with ages between 0.5 and 1.5 Gyr and redshift around 0.2 allows us to probe the spectral region that is most affected by the carbon features of TP-AGB stars (unaccessible from the ground for z ~ 0 galaxies) in the evolutionary phase when their impact on the IR luminosity is maximum. Nevertheless, none of the observed galaxies display such features. Moreover the NIR fluxes relative to optical are consistent with those predicted by the original Bruzual & Charlot (2003) models, where the impact of TP-AGB stars is much lower than has been recently advocated.

scholarly journals Quantitative Determination of Germinability ofPuccinia striiformisf. sp.triticiUrediospores Using Near Infrared Spectroscopy Technology

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Yaqiong Zhao ◽  
Feng Qin ◽  
Pei Cheng ◽  
Xiaolong Li ◽  
Zhanhong Ma ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Quantitative Determination ◽  
Near Infrared Spectroscopy ◽  
Spectral Region ◽  
Near Infrared ◽  
Puccinia Striiformis ◽  
Support Vector ◽  
Near Infrared Reflectance ◽  
Preprocessing Method

Stripe rust caused byPuccinia striiformisf. sp.tritici(Pst) is an important disease on wheat. In this study, quantitative determination of germinability ofPsturediospores was investigated by using near infrared reflectance spectroscopy (NIRS) combined with quantitative partial least squares (QPLS) and support vector regression (SVR). The near infrared spectra of the urediospore samples were acquired using FT-NIR MPA spectrometer and the germination rate of each sample was measured using traditional spore germination method. The best QPLS model was obtained with vector correction as the preprocessing method of the original spectra and 4000–12000 cm−1as the modeling spectral region while the modeling ratio of the training set to the testing set was 4 : 1. The best SVR model was built when vector normalization was used as the preprocessing method, the modeling ratio was 5 : 1 and the modeling spectral region was 8000–11000 cm−1. The results showed that the effect of the best model built using QPLS or SVR was satisfactory. This indicated that quantitative determination of germinability ofPsturediospores using near infrared spectroscopy technology is feasible. A new method based on NIRS was provided for rapid, automatic, and nondestructive determination of germinability ofPsturediospores.

Near-infrared spectroscopy for the determination of testosterone in thin-film composites

2003 ◽  
Vol 33 (2) ◽  
pp. 181-189 ◽  
Author(s):  
William Fountain ◽  
Karen Dumstorf ◽  
Amanda E. Lowell ◽  
Robert A. Lodder ◽  
Russell J. Mumper
Keyword(s):  
Thin Film ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Thin Film Composites ◽  
Film Composites

scholarly journals Large amplitude motion within acetylene–rare gas complexes hosted in helium droplets

2019 ◽  
Vol 21 (3) ◽  
pp. 1038-1045
Author(s):  
Marc Briant ◽  
Alexandra Viel ◽  
Ephriem Mengesha ◽  
Marc-André Gaveau ◽  
Benoît Soep ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Spectral Region ◽  
Large Amplitude ◽  
Near Infrared ◽  
Rare Gas ◽  
Helium Droplets ◽  
Large Amplitude Motion ◽  
Fermi Type

Near-infrared spectroscopy of the C2H2–Ar, Kr complexes was performed in the spectral region overlapping the ν3/ν2 + ν4 + ν5 Fermi-type resonance of C2H2. The HElium NanoDroplet Isolation (HENDI) technique was used for this purpose.

scholarly journals The effect of fluorine substitution in alcohol–amine complexes

2014 ◽  
Vol 16 (41) ◽  
pp. 22882-22891 ◽  
Author(s):  
Anne S. Hansen ◽  
Lin Du ◽  
Henrik G. Kjaergaard
Keyword(s):  
Hydrogen Bond ◽  
Infrared Spectroscopy ◽  
Bond Strength ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Theoretical Calculations ◽  
Molecular Complexes ◽  
Vapour Phase ◽  
Fluorine Substitution ◽  
Hydrogen Bond Strength

The effect of fluorine substitution on the hydrogen bond strength in alcohol–amine molecular complexes was investigated, with a combination of vapour phase infrared and near infrared spectroscopy and theoretical calculations.

Near infrared spectroscopy as an alternative method for rapid evaluation of toluene swell of natural rubber latex and its products

2018 ◽  
Vol 26 (3) ◽  
pp. 159-168 ◽  
Author(s):  
Chin Hock Lim ◽  
Panmanas Sirisomboon
Keyword(s):  
Thin Film ◽  
Infrared Spectroscopy ◽  
Root Mean Square Error ◽  
Thick Film ◽  
Mean Square Error ◽  
Root Mean Square ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Cross Validation ◽  
Mean Square

Toluene swell or equilibrium swelling is universally used by rubber factories to measure the degree of crosslink of their compounded or prevulcanized latices at different stages of production. To apply near infrared spectroscopy for rapid and accurate quality control, spectral acquisition of prevulcanized latex, thin film and thick film was performed using a Fourier transform near infrared spectrometer in diffuse reflection mode across the wavenumber range of 12,500–3600 cm−1. For prevulcanized latex an effective model was developed using partial least squares regression with preprocessing (first derivative + straight line subtraction method). The coefficient of determination (r2), root mean square error of cross validation and bias of the validation set were 0.71, 3.93% and −0.005%, respectively. For the thin film model the r2, root mean square error of cross validation and bias were 0.65, 4.01% and −0.028%, respectively. Whereas for the thick film model the r2, root mean square error of cross validation and bias were 0.70, 4.00% and −0.006%, respectively. Three models including prevulcanized latex, thin film and thick film were validated by 23 unknown samples, providing standard error of prediction and bias of 5.357 and 2.494, 4.565 and 1.001 and 3.641 and −0.961%, respectively, for prevulcanized latex, thin film and thick film. The model developed for the thick film spectra gave the best results.

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