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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 226 for “"spectrophotometry"”.
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New Approaches to Precision Spectrophotometry
Made available in DSpace on 2014-12-10T23:00:53Z (GMT). No. of bitstreams: 1 7105133.pdf: 3223341 bytes, checksum: 83a9c89264ba4d9936e57006d7e546e5 (MD5) Previous issue date: 1970
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ANALYTICAL STUDIES IN VACUUM-ULTRAVIOLET (VUV) SPECTROPHOTOMETRY.
ANALYTICAL STUDIES IN VACUUM-ULTRAVIOLET (VUV) SPECTROPHOTOMETRY.
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Multifilter spectrophotometry of the environment of the quasar 3C281
The technique of multifilter spectrophotometry is applied to identify stars and deduce galaxy redshifts and morphological types in a field centred on the quasar 3C281, with the intention of both testing the method and identifying members of the galaxy cluster surrounding the QSO. Photometry is …
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Spectrophotometry of Bowen resonance fluorescence lines in three planetary nebulae
This thesis studies the Bowen resonance fluorescence mechanism of OIII in three planetary nebulae: NGC 6210, 7027, and 7662. It utilizes the best spectra to date of this phenomena in the wavelength range of 3100 A-3850 A. The data are presented in the form of flux ratios relative to the strong …
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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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Evidence of Student Learning of Spectrophotometry and Intermolecular Forces in the Chemistry Laboratory
… four qualitatively distinct conceptions of spectrophotometry, with meaningful learning evident where students connected spectrophotometric measurements to light-matter interactions, expressed engagement with lab process, and articulated confidence in their findings. In a novel use of the …
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The non-invasive quantification of cutaneous haemoglobin and its oxygenation by reflectance spectrophotometry
The work detailed in this study describes the design of a rapid scanning multiwavelength reflectance spectrophotometer and its application to the measurement of cutaneous pigments. In this instrument the radiation from a 6V, 20 W quartz halogen lamp is transmitted to the reflectance probe by fibre …
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Determination of thiamine in solution by UV-visible spectrophotometry: The effect of interactions with gold nanoparticles
<p>The method presented here provides the foundation for a simple and selective qualitative determination of thiamine in solution. Gold nanoparticles in the presence of thiamine results in the formation of a secondary peak in the absorbance spectrum of the mixture. This peak can be used as an …
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Applications of Ultraviolet Spectrophotometry: I. The Determination of Theobromine and Caffeine in Cacao Products. Ii. Spectrophotometric Titrations
Made available in DSpace on 2015-05-12T17:02:29Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0006969.PDF: 4217938 bytes, checksum: 51a3aef2ae976e4e68b55c71d0ddeba9 (MD5) Previous issue date: 1953
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Determination of Organic Compounds by Atomic Absorption Spectrophotometry (AAS) with Special Reference to Compounds Encountered in Environmental Problems
A comprehensive review of the indirect methods for the determination of organic compounds by atomic absorption spectroscopy is given. The various techniques used are summarised, two examples chosen and discussed in detail in order to demonstrate the feasibility of the method. Saccharin, an …
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1. Tests of the coupled shock tube/mass-spectrometer technique ; 2. The pyrolysis of neopentane by atomic resonance absorption spectrophotometry
… of H atoms. Atomic resonance absorption spectrophotometry at the Lyman-α line was performed on three mixtures (20 ppm, 10 ppm, 5 ppm) of neopentane in argon to give k₁ = .17 x 10¹⁸ exp (-84800±6200/RT) sec⁻¹. This result is in very good agreement with earlier single pulse shock tube …
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Kinetic studies of the hydrolysis reactions of ruthenium (III) complexes hIm trans-[RuCl₄(im)₂] and hInd trans-[RUCl₄(ind)₂] by uv-visible spectrophotometry
… pH at room temperature using UV-visible spectrophotometry.</p> <p>These studies will enable us to understand how structural factors and reaction conditions affect the kinetics, which may lead us to a better understanding of the stability and anticancer properties of these complexes. The …
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Analysis of the effect of various ligands on the hydrolysis of ruthenium (III) complexes and interpretation of kinetics of hydrolysis profiles by UV-visible spectrophotometry
… under different pH values using UV-Visible spectrophotometry at room temperature. The ligands utilized in this project are imidazole, thiazole, and 1H-1,2,4-triazole. Among these, ruthenium imidazole has passed the Phase I clinical trials. For the ruthenium-imidazole (RIM) complex and the …
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Development of an antirheumatic drug
… the CuII complexes were determined using visible spectrophotometry. Finally the physico-chemical studies were carried out. Firstly by studying the interaction of the copper complex with albumin at the physiological pH 7.4 using visible spectrophotometry. Secondly by determining the superoxide …
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Global and Local Properties of Noninteracting Irregular Galaxies
… band filter photometry, large aperture spectrophotometry, small aperture spectrophotometry of individual H II regions, and H I 21-cm observations. The gas and abundance parameters, combined with other derived quantities such as the SFR, the fraction of a galaxy involved in the current …
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The Star-Forming Properties of Violently Interacting Galaxies
… and nuclear scales via narrow-band imaging and spectrophotometry.
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Studies on the Structure and Photochemistry of Bacteriorhodopsin (Proton Pumping, Cation Binding, Synthetic Pigments)
… the name, purple membrane. Atomic absorption spectrophotometry shows that purple membrane binds approximately 4 Ca('++) and Mg('++) per bR at pH = 6.0. Ca('++) and Mg('++) can be removed by various methods from their binding sites. After removal bR turns blue ((lamda)(,max) = 603 nm, the blue …
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A Novel Method for Testing Freestanding Nanofilms Using a Custom MEMS Load Cell
… Scanning Electron Microscopy, and custom spectrophotometry. The mechanical properties of several membranes were measured using the apparatus, including membranes of gold, single crystal silicon, and nano-porous silicon. The elastic properties of both the gold and silicon agree with …
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Nitrosation reactions of sym-diethyldiphenylurea and stabilizer degradation in double-base propellants
… by means of thin-layer chromatographic and spectrophotometry methods. Another aim was to devise a convenient method for indicating the age of these propellants."
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Heavy Metal Content in Stream Sediments Adjacent to the Wright County, Missouri, Sanitary Landfill
… barium, and chromium using atomic absorption spectrophotometry. The purpose was to determine if leachate emitted from the landfill transported these metals in solution and affected the stream sediments by adsorption or precipitation of these metals onto the surfaces of the sediments. Stream …
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