scholarly journals Fully programmable micro diffraction grating for VIS and near-IR spectroscopic applications

2019 ◽  
Author(s):  
R. Lockhart ◽  
B. Timotijevic ◽  
M. Canonica
Keyword(s):  
Diffraction Grating ◽  
Near Ir ◽  
Ir Spectroscopic

Near-IR Spectroscopic Determination of NaCl in Aqueous Solution

1992 ◽  
Vol 46 (12) ◽  
pp. 1809-1815 ◽  
Author(s):  
Jie Lin ◽  
Chris W. Brown
Keyword(s):  
Aqueous Solution ◽  
Temperature Effects ◽  
Continuous Monitoring ◽  
Principal Component Regression ◽  
Principal Component ◽  
Standard Errors ◽  
Near Ir ◽  
Linear And Nonlinear ◽  
Ir Spectroscopic

The concentrations of NaCl in aqueous solutions have been determined with the use of near-IR spectra between 1100 and 1900 nm. Models expressing the concentration of NaCl are developed with linear and nonlinear regression with the use of the absorbances at selected wavelengths and with principal component regression (PCR) using entire spectra. Temperature perturbations on water bands interfere with the measurement of NaCl but can be removed by linear or nonlinear regressions using the absorbances at the wavelengths where the temperature effects are zero, or they can be accounted for by PCR. Standard errors of 5 mM and a detection limit of IS mM are obtained for NaCl. This technique can be applied for quantitative analysis of NaCl in the laboratory or can be readily adapted for continuous monitoring in process control.

AN EASY APPROACH FOR ESTIMATING ABSORPTION LOSS IN ORGANIC THIN SOLID FILMS

1999 ◽  
Vol 08 (04) ◽  
pp. 519-525
Author(s):  
SHEN YUQUAN ◽  
LI ZHAO ◽  
ZHAO YUXIA ◽  
ZHAI JIANFENG ◽  
ZHOU JIAYUN ◽  
...  
Keyword(s):  
Spectroscopic Method ◽  
Optical Loss ◽  
Polymeric Films ◽  
Absorption Loss ◽  
Optical Losses ◽  
Thin Solid Films ◽  
Solid Films ◽  
Near Ir ◽  
Ir Spectroscopic

An UV-VIS-Near-IR spectroscopic method for determination of optical loss in organic/polymeric films has been suggested. The optical losses of two polyimide polymers with push-pull azobenzene chromophore attached were examined by this method and the data were calibrated by conventional optical method.

scholarly journals Near-IR Spectroscopic Monitoring of Jupiter at the Time of the SL-9 Impact

1995 ◽  
Vol 10 ◽  
pp. 629-630 ◽  
Author(s):  
R. Schulz ◽  
Th. Encrenaz ◽  
J.A. Stüwe ◽  
G. Wiedemann
Keyword(s):  
Spectroscopic Monitoring ◽  
Near Ir ◽  
Ir Spectroscopic

Vis-Near-IR Spectroscopic and Time-Dependent DFT Study of Reduced Singly Bonded C60 Species

2015 ◽  
Vol 119 (36) ◽  
pp. 9534-9540 ◽  
Author(s):  
Wei-Wei Yang ◽  
Zong-Jun Li ◽  
Shu-Hui Li ◽  
Xiang Gao
Keyword(s):  
Time Dependent ◽  
Dft Study ◽  
Near Ir ◽  
Ir Spectroscopic

scholarly journals Future prospects in observational galaxy evolution: towards increased resolution

2012 ◽  
Vol 8 (S295) ◽  
pp. 368-375
Author(s):  
Karl Glazebrook
Keyword(s):  
Galaxy Evolution ◽  
High Redshift ◽  
Personal Perspective ◽  
Molecular Gas ◽  
Future Prospects ◽  
Kinematic Data ◽  
Near Ir ◽  
Large Numbers ◽  
Ir Spectroscopic ◽  
Integral Field

AbstractFuture prospects in observational galaxy evolution are reviewed from a personal perspective. New insights will especially come from high-redshift integral field kinematic data and similar low-redshift observations in very large and definitive surveys. We will start to systematically probe the mass structures of galaxies and their haloes via lensing from new imaging surveys and upcoming near-IR spectroscopic surveys will finally obtain large numbers of rest frame optical spectra at high-redshift routinely. ALMA will be an important new ingredient, spatially resolving the molecular gas fuelling the high star-formation rates seen in the early Universe.

scholarly journals Warm and Cold Gas in Galactic Nuclei: The Near-IR/Millimeter Connection in NGC 253

1994 ◽  
Vol 140 ◽  
pp. 306-311
Author(s):  
Paul P. Van Der Werf ◽  
M. Cameron ◽  
R. Genzel ◽  
M. Blietz ◽  
A. Krabbe ◽  
...  
Keyword(s):  
Galactic Nuclei ◽  
Spectroscopic Imaging ◽  
Optical Emission ◽  
Starburst Galaxy ◽  
Stellar Content ◽  
Giant Star ◽  
Star Forming ◽  
Star Forming Regions ◽  
Near Ir ◽  
Ir Spectroscopic

AbstractWe discuss the use of seeing-limited near-IR spectroscopic imaging combined with high resolution millimeter and submillimeter wave observations, as a diagnostic in the study of the nuclear interstellar medium in starburst galaxies and active galactic nuclei. As an example, recent near-IR spectroscopic imaging of the starburst galaxy NGC 253 is analyzed. It is shown that the central ~ 100 pc of NGC 253 contains a number of giant star forming complexes, the stellar content of which is at least as large as that of the 30 Dor region in the LMC. We suggest the use of the [FeII]/Brγ ratio as an approximate age indicator for such complexes. The warm component of the nuclear molecular medium in NGC 253 detected in submillimeter CO spectra and in near-IR rovibrational lines of H2 is probably heated by stellar UV radiation or slow shocks in star forming regions, rather than by supernova remnant shocks. There are indications that molecular material is being removed from the nuclear region by the “superwind” observed in optical emission lines.

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