Global ETD Search
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 174 for “"UV-Vis spectroscopy"”.
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Sol-gel coatings containing inorganic and organic compounds--studies using Rutherford backscattering spectrometry and UV-VIS spectroscopy
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1990.
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Analysis of Blue Fountain Pen Ink by UV-Vis Spectroscopy, ATR-FTIR Spectroscopy, and Thin Layer Chromatography Enhanced with RGB Spot Evaluation to Construct a Database for Comparison and Identification.
… (TLC) enhanced with RGB spot evaluation, UV-Vis spectroscopy, and ATR-FTIR spectroscopy. All three methods were used to analyze 89 fountain pen ink samples. All three methods were able to discriminate between the majority of the ink samples. However, some samples were still similar and …
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The Synthesis and Photophysical Properties of New Polymetallic Complexes Designed for Use in Photoinitiated Electron Collection
… and characterized using electrochemistry, UV-vis spectroscopy, and UV-vis spectroelectrochemistry. The bimetallic complexes were investigated as potential light-absorber / electron-donor complexes to be used in larger supramolecular devices for photoinitiated electron collection and …
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The Development of Chitosan Microspheres for Use as Agrochemical Delivery or Agropollutant Adsorption Systems
… and their release properties investigated using UV/vis spectroscopy. It was found that chitosan hydrogel beads formed by precipitation or ionic crosslinking only exhibited uncontrolled DCD release while chitosan hydrogel beads covalently crosslinked exhibited controlled DCD release. The factors …
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Investigation of the solution chemistry and dermal absorption of novel copper (II) chelating agents that can serve as potential anti-inflammatory drugs
… (PCU.homo) using glass electrode potentiometry, UV/VIS spectroscopy, speciation modeling, nuclear magnetic resonance spectroscopy, blood plasma modeling, and dermal absorption.
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Nanomaterials Self-Assembly Driven by Beta-Amyloid Peptides
… with the nano materials were studied using HPLC, UV-vis spectroscopy, TEM and optical light microscopy.
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Diamino diamide copper complexes as anti-arthritic agents
… including glass electrode potentiometry, UV/VIS spectroscopy, molecular mechanics calculations, speciation modelling as well as X-ray crystallography. Animal experiments were also carried out.
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Boron quantitative analysis and imaging analysis in plants
… been used to quantify boron in plants, such as UV-vis spectroscopy with the Azomethine-H method and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Also recently, some techniques are being developed by investigators to investigate boron distribution in plants such as Laser Ablation ICP-MS …
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Development and Application of in Situ/Operando Spectroscopic Techniques for Understanding Active Sites and Surface Intermediate Species in Heterogeneous Catalysis
… methods, including in situ transient Raman spectroscopy, Differential Derivative Reflectance (DDR) UV-Vis Spectroscopy, Modulation Excitation Spectroscopy with Phase-Sensitive Detection (ME-PSD), and isotope modulation techniques, to investigate catalytic systems for propylene metathesis and …
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Composite poly(dimethoxyaniline) electrochemical nanobiosensor for glufosinate and glyphosate herbicides
… molecule. Fourier transform infrared (FTIR) spectroscopy, UV-Vis Spectroscopy, Transmission electron microscopy (TEM) and Scanning electron microscopy (SEM) studies inferred successful doping of the nanostructured PDMA film by PSS and that the template PSS directed the synthesis of both …
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The multifarious self-assembly of triblock copolymers : from multi-responsive polymers and multi-compartment micelles
… dynamic light scattering (DLS) and 1H NMR spectroscopy as these methods reflect the behavior on the macroscopic, mesoscopic and molecular scale. Although the first phase transition could be easily monitored due to the onset of self-assembly, it was difficult to identify the second phase …
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Cored Dendrimers: Synthesis and Applications
… and the cored dendrimer were monitored by UV/Vis spectroscopy. The results showed that these cored dendrimers were selective for porphyrins complementary in both shape and functionality to the binding site created in their interior. The binding behavior of these cored dendrimers was found …
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Electrochemistry of Polyaniline-DNA System.
… electrode, respectively. The ultraviolet-visible (UV-Vis) spectroscopy, the alternating-current impedance, the electrochemical quartz crystal microbalance (EQCM) and the voltammetry techniques have been used to characterize the above system. Results revealed that during the surface …
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ULTRAFAST DYNAMICS IN NITRO- AND (ORGANOPHOSPHINE)GOLD(I)-POLYCYCLIC AROMATIC HYDROCARBONS
… resolution, steady-state Xe-lamp irradiation, UV/Vis spectroscopy and HPLC methods. Ground- and excited-state calculations were performed to help interpret the experimental results. Two types of PAH derivatives were chosen for this research: those substituted with nitro groups and those with …
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Immunosensors developed on clathrate platform compounds
… spectroscopic methods and were found to be both UV/Vis active (λmax = 400 nm flourene derivative and λmax = 337 nm xanthene derivative ) and fluorescent (440nm and 467nm flourene derivative and 344 and 380 xanthene derivative). These compounds were drop coated onto commercial glassy carbon …
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Nanocomposite of ZrO2/Polymer Thin-Film Coatings by the Ionically Self-Assembled Monolayer Technique
… the grain diameter of the zirconia particles. UV/Vis spectroscopy and ellipsometry were used to characterize the ISAM technique. SEM and AFM were used to observe the microscopic structure of the multilayer structures. Some mechanical properties were characterized by adhesion, abrasion, and …
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Synthesis and Characterization of Methylammonium Strontium Bromide Hybrid Perovskite
… concentration on crystal growth using XRD and UV-Vis spectroscopy. The composition and crystalline nature of the MASrBr3 thin film were further confirmed using XRD and SEM-EDX. We explored the stability of the MASrBr3 thin films in three solvents and the electrochemical stability of MASrBr3 in …
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Single Step Synthesis of Antibiotic Kanamycin Embedded Gold Nanoparticles for Efficient Antibacterial Activity
… Electron Microscopy (TEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FTIR), and Ultra-Voilet/Visible spectroscopy (UV/Vis spectroscopy). The following research is a direct bio-friendly embedment of an antibiotic agent on the surface of the GNPs without any …
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The synthesis and characterization of alginate-melanin hydrogels for applications in forensic science
… reactions with the alginate polymer backbone. UV-VIS spectroscopy showed broadband absorption in the visible region consistent with melanin compounds. ATR-FT-IR, 1H-NMR, and 13C-NMR analyses indicated alkynyl group incorporation, and DART-MS showed molecular size increase, albeit with …
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Part I: Peptide Dendrimers From Natural Amino Acids. Part II: Nonfullerene Nanotubes From Bridged Dendritic Metalloporphyrin Complexes
… method. Each reaction was monitored by UV-Vis spectroscopy, 1H NMR spectroscopy, MALDI-MS, and SEC. Upon core removal, average mass loss of 734 Da (tin porphyrin core) per monomeric unit was exhibited in the MALDI mass spectra for each oligomer. The cored out structure 53 was soluble in …
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