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Showing 1 to 17 of 17 for “"UV-visible Spectrophotometry"”.
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Determination of thiamine in solution by UV-visible spectrophotometry: The effect of interactions with gold nanoparticles
… amino acids. The interaction was measured using UV-VIS spectroscopy. The formation of secondary absorbance peaks was correlated to a change in the shape of the gold nanoparticles. A limit of detection was estimated and the relative selectivity of the method was evaluated. The main challenge in …
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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
… under different 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 …
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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
… are studied 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 …
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Controlling the interfacial behaviour of colloidal microgel systems
… scattering (DLS), laser Doppler electrophoresis, UV-visible spectrophotometry and scanning electron microscopy. The influence of co-monomer incorporation, e.g. structure and relative hydrophobicity, upon the physicochemical properties of the microgel was examined. Hydrophobic modification strongly …
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Electrical and optical properties of novel phthalocyanine compounds for sensor devices.
UV/visible spectrophotometry measurements, together with measurement of the temperature dependence of ac parameters G (conductance), C (capacitance) and tan (dielectric loss) for 20Hz<f<1MHz, and dc conduction, for 77K<T<300K, are performed for a number of vacuum-sublimed phthalocyanine …
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Electrical and optical properties of novel phthalocyanine compouns for sensor devices
UV/visible spectrophotometry measurements, together with measurement of the temperature dependence of ac parameters G (conductance), C (capacitance) and tan (dielectric loss) for 20Hz<f<1MHz, and dc conduction, for 77K<T<300K, are performed for a number of vacuum-sublimed phthalocyanine compounds. …
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Structure-activity relationships in Werner clathrates
… are Microanalysis, Mass Spectrometry and UV/Visible Spectrophotometry. An intramolecular potential energy study on the [Ni(NCS)2(3,5-diMepy)4] complex reveals that the orthohydrogens on the 3,5-dimethylpyridine ligands control the conformation of the molecule. Packing densities and volume …
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Block co-polymerization by transformation reactions
… a period of days. This was investigated using UV / visible spectrophotometry and the wavelength of maximum absorbance of the PStLi was found to change with the decay from an initial value of 328mn. to λmax of approximately 340nm. after 4-7 days. SEC analysis of solutions of polystyrene, using …
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Forensic Analysis of Trace Evidence Fibers and Drugs of Abuse In Biological Matrices Using Chromatographic and Mass Spectrometric Methods
… (LC) or capillary electrophoresis (CE) with UV/visible diode array (DAD) or mass spectrometric (MS) detection is described. Separation and characterization of acid, basic and disperse dyes from nylon, acrylic and polyester fibers was achieved. Ultra performance liquid chromatography with DAD …
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The application of colloidal photocatalysis in actinide photoredox chemistry
… techniques such as photopotentiometry and UV-Visible spectrophotometry, the former being wholly developed within these laboratories. From these experiments, the effect of particle thermodynamics on reaction yield has been identified and the rate determining step in the valence control …
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THE MODIFICATION OF ELECTROCHEMICAL AND PHOTOELECTROCHEMICAL PROPERTIES IN THIN FILMS OF TRI- AND TETRAVALENT METAL PHTHALOCYANINES
… films were monitored by electron microscopy, UV-visible spectrophotometry, X-ray and Ultra-violet surface spectroscopies, and a variety of electrochemical and photoelectrochemical techniques. All four systems behaved in a manner similar to a p-type semiconductor when prepared at rapid rates …
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Oxovanadium(IV) and (V) complexes with naturally-occurring molecules
… measurements, and whenever possible, by UV-Visible spectrophotometry. 1H and 51VNMR were also used to characterize the two oxovanadium(V) complexes,VO(OCH3)(bz)2 and VO(0C2H5)(bz)2. Single crystal X-ray diffraction studies ofVO(oz)2 and V0(thz)2 were also performed by the departmental …
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Beneficiation of selected pesticides and an antihyperlipidemic agent via cyclodextrin complexation and co-crystallization
… of fenthion was qualitatively evaluated using UV-visible spectrophotometry and induced circular dichroism. Phase solubility profiles at 25 ᵒC were of type Bs for solubilisation of DCB by β-CD and (2-hydroxypropyl)-β-CD, and for solubilisation of fenthion by β-CD, the respective 1:1 association …
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Fundamental Understanding of NOx Sequestration Capacity And Pathways in Nano-TiO2 Engineered Cementitious Materials
… combines water-based wet chemical extraction, UV-visible spectrophotometry, and ion chromatography to quantify the NOx sequestration capacity in both plain and TiO2-modified cementitious pastes. Compared to plain cement pastes, TiO2-modified cement pastes exhibit higher NOx uptake (in terms of …
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A Study on Photodegradation and The Fate of Pyrogenic Carbon
… Following exposure, samples were tested using UV visible spectrophotometry, gas chromatography, as well as pH and electrical conductivity. Results indicated that photodegradation accounts for a 50% loss of dissolved pyrogenic carbon with the amount of photodegradation being proportional to …
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Carboxylate metallogels - an adventure in supramolecular chemistry
… and Fe-tri-DMF. This was monitored using UV-visible spectrophotometry. Gas sorption experiments were performed using carbon dioxide, hydrogen, nitrogen, and water vapour. This was done in order to determine the response of selected xerogels to gas as well as to examine the effect of the …
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Study on Methods of Simultaneous Multi-Component Analysis.
… and actual experimental data obtained from a UV-VIS spectrophotometric measurement of metal complexes to conduct the study. Well understood and defined systems tend to give good results. The main obstacle has been, and still is, interferences in spectral information one gets from the …