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Showing 1 to 20 of 75 for “"Absorption bands"”.
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Changes in the Absorption Bands of Ethyl-Chlorophyllide During Crystallization
Made available in DSpace on 2015-05-12T17:11:41Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0004454.PDF: 3215445 bytes, checksum: 08ff2b305c11c955fca37d27a8d58b23 (MD5) Previous issue date: 1952
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Near Infrared Absorption Bands of the Hydroxyl Ion in Alkali-Halide Crystals
Made available in DSpace on 2015-05-12T21:41:43Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6801880.PDF: 2794999 bytes, checksum: efd2c87f4a26755cda473293c629510a (MD5) Previous issue date: 1967
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Near infrared absorption bands of the hydroxyl ion in alkali halide crystals
The near infrared absorption bands due to OH- in NaC1, NaBr, KCI, KBr, KI, and RbC1 have been measured at temperatures ranging from 1.4~ to 380 oK. Energy levels of the hydroxyl dipole in the crystal lattice were determined from the spectra. The crystals were grown by the Czochra1ski m~thod in a …
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Influence of applied uniaxial stress upon the ultraviolet absorption bands in KBr and KI
… H(ii) and H(iii), possessing the same optical absorption band as the H center but differing both from the H' center and from each other in their reorientation kinetics. A study of the wavelength dependence of the H, H(ii), and VI (Na+) centers s~owed the 'existence of three similar-polarized …
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Influence of Applied Uniaxial Stress Upon the Ultraviolet Absorption Bands in Potassium-Bromide and Potassium-Iodide
Made available in DSpace on 2015-05-12T22:38:41Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7114842.PDF: 3482592 bytes, checksum: 6f3d87b99eb4136339d0000f602989b6 (MD5) Previous issue date: 1970
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A study of the infrared spectrum of sulphur from 2 to 55 microns and a temperature analysis of the observed absorption bands
… that the infrared fundamentals are the observed bands located at 41.6 μ and 52.3 μ, which is in good agreement with the assignment of Scott, Mcullough and Kruse. Less conclusive results were found for the identification of third infrared fundamental. Intermolecular coupling in the crystal was …
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Intrinsic Spectroscopic Tumor Markers Revealed by Double-Differential Analysis of Near-Infrared Absorption Spectra
… resolution. Application of this method to absorption spectra from tumor-containing tissue reveals specific tumor components (STC). The STC are characterized by specific NIR absorption bands. These absorption bands are tumor specific in at least two important ways: (1) spatial …
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Revealing Refractory Materials on Trans-Neptunian Objects and Centaurs via Reflectance Spectroscopy
… via the presence of their characteristic absorption bands. Most of the objects observed exhibit reflectance spectra typical of TNOs, without characteristic absorption bands attributable to silicates or refractory hydrocarbons. The reflectance spectra of two objects, however, were confirmed …
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Surface characteristics of near-earth objects
… showing a higher red slope and less prominent absorption bands. This effect has been seen especially in the spectra of asteroids located in the main belt. Scientists now believe that space weathering processes, such as solar wind ion implantation and bombardment by micrometeorites, can affect …
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Modified chalcogenide glasses for optical device applications
… formation.Vanadium doped GLS displays three absorption bands at 580, 730 and 1155 nmidentified by photoluminescence excitation measurements. Broad photoluminescence,with a full width half maximum of ~500 nm, is observed peaking at 1500 nm whenexciting at 514, 808 and 1064 nm. The fluorescence …
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A parametric study of the validity of the weak-line and strong-line limits of infrared band absorption
… the errors in the weakline and strong-line band absorption limits for a wide range of temperatures, pressures, path lengths, and species concentrations. The weak-line limit is valid under the condition 2u/β « 1. The strong-line limit is valid under the opposite conditions of the weak-line limit, …
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ΣΥΝΘΕΣΗ ΔΙΘΕΙΟΛΕΝΙΚΩΝ ΣΥΜΠΛΟΚΩΝ ΤΟΥ ΒΟΛΦΡΑΜΙΟΥ ΚΑΙ ΜΟΛΥΒΔΑΙΝΙΟΥ ΚΑΙ ΜΕΛΕΤΗ ΤΗΣ ΦΩΤΟΚΑΤΑΛΥΤΙΚΗΣ ΚΑΙ ΚΑΤΑΛΥΤΙΚΗΣ ΔΡΑΣΗΣ ΤΟΥ ΣΥΜΠΛΟΚΟΥ ΤΡΙΣ-11-(4-ΜΕΘΟΞΥΦΑΙΝΥΛΟ)-2-ΦΑΙΝΥΛΟ-1,2-ΑΙΘΥΛΕΝΟΔΙΘΕΙΟΛΕΝΙΚΟΥ - S,S '1 ΒΟΛΦΡΑΜΙΟΥ
… THEIR ELECTRONIC SPECTRA SHOWED VERY INTENSIVE ABSORPTION BANDS IN THE VISIBLE REGION. THE PHOTOCATALYTIC AND CATALYTIC BEHAVIOUR OF THE COMPLEXE TRIS-(-1-M-METHOXYPHENYLO-)2-PHENYLO-1.2-ETHENODITHIOL TUNGSTEN WERE STUDIED. THIS COMPLEX IS THE FIRST PHOTOSENSITIZER, SO FAR THAT ACTS ALSO AS A …
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pH effects and rebinding pathways in CO adducts of heme proteins
CO-adducts of heme proteins have IR absorption bands over the range 2200-1900 cm$\sp{-1}$. Flash photolysis can break the Fe-C bond, freeing the ligand. Below the glass-transition temperature of the protein-solvent system, $T\sb{g} \approx$ 185K, heme proteins are frozen into static conformations, …
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Detecting surface inhomogeneity of asteroids
… time-resolved spectroscopy revealed methane ice absorption bands, with band depths varying between 3.33% and 4.80%, consistent with previously reported values. Photometric analysis supported these results, showing an r − i colour variation linked to surface inhomogeneity. For asteroid 2005 EK70, …
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Direct measurement and analysis of cyclohexadienyl oxidation
… is created using laser-flash photolysis. The UV absorption bands of the radical are probed and it's relative concentration over time measured in non-polar solvents in both the presence and absence of oxygen. Several analytical and numerical models of the chemistry were constructed to explain a …
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Rare-earth-doped gallium lanthanum sulphide glasses for mid-infrared fibre lasers
… and the tendency to crystallisation. <br/><br/>Absorption, fluorescence, and lifetime measurements were performed for eleven RE ions for wavelengths ranging from the visible to the mid-infrared with a focus on mid-infrared transitions. The results of the measurements were used to study the …
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Detection of rare earth elements and rare earth oxides with hyperspectral spectroscopy
… by the full width of half maxima of the target absorption band; 3) mathematical modeling of the target absorption band and highlighting of rare earth elements. REEMAP was further adapted to different hyperspectral sensors (EO-1 Hyperion and EnMAP) and a new test site (Lofdal, Namibia). …
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The spectroscopy and the photophysics of 1,2-benzazulene, a derivative of azulene.
… of 1,2-benzazulene and azulene. Steady-state absorption measurement reveals that the S1-S0 absorption bands for azulene and 1,2-benzazulene look similar in shape and intensity but very weak compared to their respective S2-S0 absorption spectrum. However, the first absorption bands for …
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Spectral Reflectance as an Indicator of Water Quality in Streams Impacted by Mine Drainage
… associated with the sediments shifted primary absorption bands to lower wavelengths. Spectral analysis results were used to classify Digital MultiSpectral Video (DMSV) imagery for several sites in theregion. The high spatial resolution of the DMSV sensor allowed for precise mapping of the mine …
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Novel near-infrared absorbing dyes
… absorbing squarylium dyes with narrow, intense absorption bands at about 800nm were obtained by reacting squaric acid with 2,2-disubstituted dihydroperimidines. The first dyes of this type possessed poor organic solvent solubilities but, through modification of the 2,2-substituents of the …
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