I discuss Spitzer GO programs aimed at studying the mid-IR spectral properties of IR-luminous galaxies at high z. I present the IRS lowresolution, mid-IR spectra of a sample of 52 sources from our GO1 medium size program. We found that ∼ 75% of the sample are at z ∼ 1.5−2.6, with redshifts determined based on features including PAH emission and silicate absorption in the mid-IR spectra. This da...

Nicolay I. Dodoff Institute of Molecular Biology, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 21, 1113 Sofia, Bulgaria Reprint requests to Dr. N. I. Dodoff. E-mail: [email protected] Z. Naturforsch. 56b, 1217-1226 (2001); received August 28, 2001 IR Spectra, Palladium(II) and Platinum(II) Complexes, /V-3-Pyridinylmethanesulfonamide The complexes ds-[Pd(PMSA)2Cl2] a's-[Pt(PMSA)2X2]...

The IR and NMR spectra were coupled with quantum chemical calculations in DFT approach usingthe hybrid B3LYP exchange-correlation functional to confirm the structure of 2-methoxycarbonyl-7-methyl-1,3-thiazino[3,2-b][1,2,4]triazine-4,8-dione 2d.

We present the resonant two-photon ionization (R2PI) spectra as well as the UV–UV and IR–UV double resonance spectra for the cyclic dipeptide Phe-Ser. The R2PI spectrum shows five strong transitions in the region of 37 500–37 900 cm . By performing UV–UV double resonance spectroscopy, we distinguished 5 different conformers. For each of these conformers, the origin is the most intense transitio...

Results obtained in mapping algal belts in the Orbetello Lagoons are described using Daedalus/ MIVIS hyperspectral scanner aerial images. MIVIS has a spectral coverage in the Visible, Near-IR, Mid-IR and Thermal-IR regions, with 102 channels. The objective of the work is a procedure for the algal species recognition, using methods of spectral data analysis. The 1± 2 m deep brackish, shallow wat...

To explore how the ion-pair in a single salt molecule evolves with the addition of water, infrared (IR) spectra of complexes composed of NaCl and multiple water molecules have been recorded for the first time. The NaCl(H2O)n complexes were formed and probed in liquid helium nanodroplets, and IR spectra were recorded for n = 1 → 4. The spectra for n = 1, 2, and 3 are consistent with formation of...

Th e chemical composition and sensory characteristics vary signifi cantly within different honey types. In order to determine botanical origin of honey, it is necessary to conduct rather complicated and time consuming analytical methods. IR spectroscopy has not yet been experimentally explored for honey analysis in Croatia, so the aim of this study was to determine claimed botanical origin of h...

OBJECTIVES The aim of this paper is to investigate the activities of Malaysian local herbs (Clinacanthus nutans Lindau, Strobilanthes crispus, Murdannia bracteata, Elephantopus scaber Linn., Pereskia bleo, Pereskia grandifolia Haw., Vernonia amygdalina, and Swietenia macrophylla King) for anti-hypertensive and vasorelaxant activity. An infrared (IR) macro-fingerprinting technique consisting of ...

Context. One of the key ingredients in establishing the relation between input signal and output flux from a spectrometer is accurate determination of the spectrophotometric calibration. In the case of spectrometers onboard satellites, the accuracy of this part of the calibration pedigree is ultimately linked to the accuracy of the set of reference spectral energy distributions (SEDs) that the ...

The FT-IR, FT-Raman and SERS Spectra of 1-Chloro 4-Flurobenzene (C6H4CLF) have been recorded in the range 4000-400cm -1 , the optimized geometry,frequency and intensity of the vibrtional bands of C6H4CLFhave been obtained by DFT levels of theory with complete relaxation in the 6-311**G basis sets. A complete vibrational assignment, aided by the theoretical frequency analysis, has been proposed....