Spectroscopic studies of folic acid adsorbed on various metal substrates: does the type of substrate play an essential role in temperature dependence of spectral features?

2014 ◽  
Vol 45 (9) ◽  
pp. 750-757 ◽  
Author(s):  
Alžběta Kokaislová ◽  
Tereza Helešicová ◽  
Milan Ončák ◽  
Pavel Matějka
Keyword(s):  
Folic Acid ◽  
Temperature Dependence ◽  
Essential Role ◽  
Spectroscopic Studies ◽  
Spectral Features ◽  
Metal Substrates

Near Infrared Spectroscopic Studies of Starch and Water in Some Processed Cereal Foods

1996 ◽  
Vol 4 (1) ◽  
pp. 195-200 ◽  
Author(s):  
B.G. Osborne
Keyword(s):  
Hydrogen Bonding ◽  
Wheat Flour ◽  
Near Infrared ◽  
Spectroscopic Studies ◽  
Reflectance Spectra ◽  
Spectral Features ◽  
Bread Crumb ◽  
Starch Structure ◽  
Infrared Spectroscopic

Near infrared (NIR) reflectance spectra of wheat flour, dried extrudates and bread crumb over the range 1350–1650 nm exhibit similar features which provide information about the changes in starch structure which take place during their processing or aging. It is postulated that the observed spectral features are related to changes in the states of hydrogen bonding of O–H bonds in starch and water.

Fluorescence Spectroscopic Studies of (Acetamide + Sodium/Potassium Thiocyanates) Molten Mixtures: Composition and Temperature Dependence

2010 ◽  
Vol 114 (15) ◽  
pp. 5066-5081 ◽  
Author(s):  
Biswajit Guchhait ◽  
Harun Al Rasid Gazi ◽  
Hemant K. Kashyap ◽  
Ranjit Biswas
Keyword(s):  
Temperature Dependence ◽  
Spectroscopic Studies ◽  
Sodium Potassium

Temperature dependence Raman spectroscopic studies of Pb(Yb0.5Ta0.5)O3

2008 ◽  
Vol 46 (1) ◽  
pp. 22-27 ◽  
Author(s):  
Dibyaranjan Rout ◽  
V. Subramanian ◽  
V. Sivasubramanian
Keyword(s):  
Temperature Dependence ◽  
Spectroscopic Studies ◽  
Raman Spectroscopic

SPECTROSCOPIC STUDIES OF ALCOHOLS: VI. INTRAMOLECULAR HYDROGEN BONDS IN ETHANOLAMINE AND ITS O- AND N-METHYL DERIVATIVES

1965 ◽  
Vol 43 (11) ◽  
pp. 2970-2977 ◽  
Author(s):  
P. J. Krueger ◽  
H. D. Mettee
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Temperature Dependence ◽  
Spectroscopic Studies ◽  
Intramolecular Hydrogen Bonds ◽  
Distinct Band ◽  
Conformational Equilibria ◽  
Methyl Derivatives ◽  
Intramolecular Hydrogen

The competitive intramolecular [Formula: see text] hydrogen bonding in ethanolamine and N-methylethanolamine has been studied in dilute C2Cl4 solution by means of the temperature dependence of the fundamental OH and NH stretching bands. Of the three conformers identified for each of these compounds, the least stable shows a distinct band which is assigned to a "terminal" OH group involved in an intramolecular [Formula: see text] hydrogen bond. Enthalpy differences between conformers are reported and discussed, and compared with those found for the conformational equilibria in 2-methoxyethylamine and N,N-dimethyl-ethanolamine.

Magnetische und Mößbauer-spektroskopische Untersuchungen von zeolithischen Eisenkontakten/ Magnetic and Mössbauer Spectroscopic Studies of Iron-Clusters in Zeolites

1975 ◽  
Vol 30 (12) ◽  
pp. 1627-1632 ◽  
Author(s):  
F. Schmidt ◽  
W. Gunsser ◽  
A. Knappwost
Keyword(s):  
Magnetic Susceptibility ◽  
Temperature Dependence ◽  
Mössbauer Spectra ◽  
Bulk Material ◽  
Spectroscopic Studies ◽  
Ferrous Ions ◽  
Iron Clusters ◽  
Mossbauer Spectra

Abstract Iron clusters have been prepared within zeolite holes by reduction of zeolites containing ferrous ions. The diameter of these particles must therefore be smaller than 13 Å. They are super-paramagnetic and their Mössbauer spectra show no HFS, even at 4 K.The temperature dependence of the magnetic susceptibility of the unreduced zeolites obeys a Curie-Weiss law with peff = 4,54 μB and Θ = 105 K. The Weiss curves of the reduced samples lie distinctly below those of the bulk material.

scholarly journals Probing the high-redshift universe with SPICA: Toward the epoch of reionisation and beyond

2018 ◽  
Vol 35 ◽  
Author(s):  
E. Egami ◽  
S. Gallerani ◽  
R. Schneider ◽  
A. Pallottini ◽  
L. Vallini ◽  
...  
Keyword(s):  
High Redshift ◽  
Far Infrared ◽  
Spectroscopic Studies ◽  
Wide Field ◽  
Spectral Features ◽  
Star Forming ◽  
Luminous Infrared Galaxies ◽  
Chemical Enrichment ◽  
Solid Compounds ◽  
High Redshift Universe

AbstractWith the recent discovery of a dozen dusty star-forming galaxies and around 30 quasars at z > 5 that are hyper-luminous in the infrared (μ LIR > 1013 L⊙, where μ is a lensing magnification factor), the possibility has opened up for SPICA, the proposed ESA M5 mid-/far-infrared mission, to extend its spectroscopic studies toward the epoch of reionisation and beyond. In this paper, we examine the feasibility and scientific potential of such observations with SPICA’s far-infrared spectrometer SAFARI, which will probe a spectral range (35–230 μm) that will be unexplored by ALMA and JWST. Our simulations show that SAFARI is capable of delivering good-quality spectra for hyper-luminous infrared galaxies at z = 5 − 10, allowing us to sample spectral features in the rest-frame mid-infrared and to investigate a host of key scientific issues, such as the relative importance of star formation versus AGN, the hardness of the radiation field, the level of chemical enrichment, and the properties of the molecular gas. From a broader perspective, SAFARI offers the potential to open up a new frontier in the study of the early Universe, providing access to uniquely powerful spectral features for probing first-generation objects, such as the key cooling lines of low-metallicity or metal-free forming galaxies (fine-structure and H2 lines) and emission features of solid compounds freshly synthesised by Population III supernovae. Ultimately, SAFARI’s ability to explore the high-redshift Universe will be determined by the availability of sufficiently bright targets (whether intrinsically luminous or gravitationally lensed). With its launch expected around 2030, SPICA is ideally positioned to take full advantage of upcoming wide-field surveys such as LSST, SKA, Euclid, and WFIRST, which are likely to provide extraordinary targets for SAFARI.

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