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Showing 1 to 20 of 32 for “"ultraviolet absorption"”.
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Studies of vacuum ultraviolet absorption spectra of simple gases
… in the first order of a 21-foot vacuum ultraviolet spectrograph. The background continuum was provided by a xenon discharge lamp excited by a 2450 Mc/sec microwave diathermy unit. The exposure time varied from 30 minutes to four hours depending upon the slit width. Wavelength standards …
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Analysis of Gases Utilizing Sensitive and Precise Ultraviolet Absorption Spectrophotometry
Made available in DSpace on 2014-12-10T23:01:24Z (GMT). No. of bitstreams: 1 7219935.pdf: 3182262 bytes, checksum: c615bacb1d6d46063b622e6327afe500 (MD5) Previous issue date: 1972
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Design of an ultraviolet absorption spectroscopy oil concentration sensor for online HVAC measurements
… the most accurate online measurements of OCR, ultraviolet absorption spectroscopy has been selected as the measurement approach. Related work in this field is based on models that are unable to make accurate measurements down to zero percent oil concentration. Because of the extremely low OCR …
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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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The synthesis and reactions of 2-(1-Naphthylmethyl)-2'- Carboxybenzophenone
… elemental analyser. The infrared and ultraviolet absorption spectra of the six new compounds were recorded.
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Synthesis and properties of some 2,5-dihydrothiophene 1,1-dioxides
… was substantiated by both infrared and ultraviolet evidence. 7. Isomeric monobromo dihydrothiophene 1, 1-dioxides have been prepared via elimination reactions of the isomeric dibromo tetrahydrothiophene 1, 1-dioxides. Their structures have been supported by ultraviolet absorption …
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The Intensity of Ligand Absorption
The ultraviolet absorption spectra of a number of aryl phosphines and amines and transition metal complexes of triphenylphosphine have been determined. These data indicate that the intensity of the Õ* ¬ Õ phenyl ring transition is not only sensitive to the central atom attached to the ring but is …
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Spectroscopic measurement of nitric oxide in a diffusion flame
… to data obtained with probe sampling procedures. Ultraviolet absorption of the (1,0) gamma bands of nitric oxide near 214.8 nm were used for the spectroscopy. Spectroscopic measurements were possible only when the air stream was seeded with ca. 100 ppm NO. A conventional sampling system was …
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Steroid 2,4-Dinitrophenylhydrazones: their preparation, separation, and characterization
… four well defined groups on the basis of their ultraviolet spectra and that this classification could be correlated with the structures of the DNPH's. Within each group the compounds were similar to each other with respect to their melting points, color, solubilities and infrared spectra as well …
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Recovering the hydrocarbon distributions in Saturn's upper atmosphere through mathematical inversion.
… 2 UVS occultation experiments measured the ultraviolet absorption properties of the upper atmosphere of Saturn. In the extreme-ultraviolet wavelength region from 1300 Å to 1700 Å, CH₄, C₂H₂, C₂H₄, C₂H₆ and C₄H₂ are the major absorbers in the Saturnian upper atmosphere. In this dissertation, …
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Roles of singlet oxygen and triplet excited state of dissolved organic matter formed by different organic matters in bacteriophage MS2 inactivation
… simulated sunlight, containing visible light and ultraviolet light with wavelengths greater than 320 nm, was investigated. The results from experiments with synthetic sensitizers Rose Bengal, 3'methoxyacetophenone, and nitrite suggested that singlet oxygen (1O2), triplet excited state of dissolved …
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Maize dwarf mosaic virus: purification, some physical properties, and yield of virus from several corn hybrids
… M sodium citrate, pH 7.0. Purified virus has an ultraviolet absorption spectrum typical for filamentous viruses having 5% RNA, shows birefringence, has an A260/280 of 1.18, and a sedimentation coefficient of 160-162 S. The virus is filamentous and appears to be a member of the potato virus Y …
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Towards Water-Soluble Peroxyl Radial Clocks
… offer the advantage that they have a pronounced ultraviolet absorption that tails into the visible, permitting efficient photochemical generation of the same alkyl radicals, but at longer wavelengths than that which are currently employed.
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Balancing Bromate Formation, Organics Oxidation, and Pathogen Inactivation: The Impact of Bromate Suppression Techniques on Ozonation System Performance in Reuse Waters
… such as through hydroxyl radical exposure and ultraviolet absorption spectrum measurements, which were correlated and utilized to develop a hydroxyl radical exposure predictive model.
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