scholarly journals Near-Infrared Spectroscopy of Seyfert and Starburst Galaxies

1989 ◽  
Vol 134 ◽  
pp. 301-302
Author(s):  
Minoru Nishida ◽  
Kimiaki Kawara
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Atomic Hydrogen ◽  
Molecular Hydrogen ◽  
Near Infrared ◽  
Starburst Galaxies ◽  
Interacting Galaxies ◽  
Infrared Spectrometer

The Brackett α and γ lines of atomic hydrogen, molecular hydrogen H2 v=1-0 S(1) line and [FeII] 1.644 μm line were observed in type 1 and type 2 Seyferts, LINERS, starburst galaxies, and interacting galaxies. For the observations, the Infrared Spectrometer (IRS) with an array of eight InSb detectors was used on the CTIO 4 m and 1.5 m telescopes. The effective size of the slit is 6.8″x4.3″ on the 4 m and 10.3″x20.7″ on the 1.5 m. The resolution of the IRS was 290 km s−1 at 2 μm.

Near- versus Mid-Infrared Diffuse Reflectance Spectroscopy for the Quantitative Determination of the Composition of Forages and By-Products

1994 ◽  
Vol 2 (1) ◽  
pp. 49-57 ◽  
Author(s):  
James B. Reeves
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Diffuse Reflectance ◽  
Near Infrared ◽  
Reflectance Spectroscopy ◽  
In Vitro Digestibility ◽  
Mid Infrared ◽  
Infrared Spectrometer ◽  
By Products

The objective of this work was to explore the relative value of near- and mid-infrared diffused reflectance spectroscopy in determining the composition of forages and by-products. Sixty-seven samples consisting of 15 alfalfa, 16 tall fescue and 15 orchard grass hays, 10 corn stovers and 11 wheat straws at various stages of maturity were examined by diffuse reflectance using a scanning monochromator (1100–2500 nm), a Fourier near infrared spectrometer (10,000–4000 cm−1, 4 and 16 cm−1 resolution, neat and 5% sample in KBr) and a Fourier mid-infrared spectrometer (4000–400 cm−1, 4 and 16 cm−1 resolution, neat and 5% sample in KBr). Samples were analysed chemically and spectroscopically for fibres, in vitro digestibility, crude protein, nitrobenzene oxidation products and various measures of lignin content. The results showed that diffuse mid-infrared reflectance spectroscopy can perform as well as, and sometimes better than, diffuse near infrared spectroscopy in determining the composition of forages and by-products. In addition, Fourier near infrared spectroscopy did not perform as well as either near infrared using a scanning monochromator or the Fourier mid-infrared spectrometer. Finally, diluting samples with KBr was not beneficial for either Fourier based determinations. Additional work with more diverse data sets and various Fourier instrument configurations will be needed to further define the limits and usefulness of Fourier transform near- and mid-infrared spectroscopy in the determination of forage and by-product composition.

Functional near‐infrared spectroscopy detects increased activation of the brain frontal‐parietal network in youth with type 1 diabetes

2020 ◽  
Vol 21 (3) ◽  
pp. 515-523 ◽  
Author(s):  
Paul K. Mazaika ◽  
Matthew Marzelli ◽  
Gabby Tong ◽  
Lara C. Foland‐Ross ◽  
Bruce A. Buckingham ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Functional Near Infrared Spectroscopy ◽  
The Brain

Identification of the Content of Ganoderma Lucidum Powder in Ganoderma Lucidum Spore Powder Based on Near-Infrared Spectroscopy and Partial Least Squares

2014 ◽  
Vol 590 ◽  
pp. 656-659
Author(s):  
Xiao Ting Li ◽  
Li Ya Xia ◽  
Pei Yun Chen ◽  
Yan Ping Pang
Keyword(s):  
Infrared Spectroscopy ◽  
Least Squares ◽  
Partial Least Squares ◽  
Near Infrared Spectroscopy ◽  
Ganoderma Lucidum ◽  
Near Infrared ◽  
Diffuse Reflectance Spectroscopy ◽  
True Value ◽  
Result Show ◽  
Infrared Spectrometer

In order to identify the content of Ganoderma lucidum powder in Ganoderma lucidum spore powder, diffuse reflectance spectroscopy of samples were collected by the Fourier near-infrared spectrometer. The spectroscopy was pretreated by minimum and maximum normalization and then analyzed with partial least squares (PLS) method. The spectral at 6110 cm-1 to 4598 cm-1 was establish PLS model with factors number 10. The result show that the squared correlation coefficient R2 between predicted value and true value is 99.99%, and RMSECV is 0.382. In conclusion, Ganoderma lucidum spore powder and Ganoderma lucidum powder can be identified accurately and quickly based on near-infrared spectroscopy and PLS.

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