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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 32 for “"probe molecules"”.
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Interaction of Acid/Base Probe Molecules with Specific Features on Well-Defined Metal Oxide Single-Crystal Surfaces
… the literature on the interaction of acid/base probe molecules with well-defined oxide surfaces of known coordination geometry and oxidation state. The well-defined, single crystal surfaces of Cu₂O (111), SnO₂ (110), and Cr₂O₃ (101̲2) were investigated for their acid/base properties by the …
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Applications of Pump-Probe and Two-Photon Techniques in Time-Resolved Fluorescence Microscopy and Spectroscopy
… to time-resolved polarization imaging of probe molecules inside STO cells are shown. Depending on the type of probe molecules and the nature of their interaction with cellular constituents, different degrees of rotational correlation times are obtained.
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Magnetic resonance investigations of pH in microemulsions
… of magnetic resonance (MR) techniques to probe the pH in aqueous solutions and reverse micelles formed in CTAB, Triton-X and AOT microemulsions. These techniques have enabled visualisation of propagating acidity fronts in the bromate-sulfite reaction using magnetic resonance imaging. …
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Applications of pump-probe and two-photon techniques in time-resolved fluorescence miscroscopy and spectroscopy
Pump-probe spectroscopy has long been useful in the elucidating ultrafast molecular phenomena. We developed a variation of time-resolved, pump-probe methodology using cross-correlation principles of the frequency-domain. An unique feature of our technique is that the low-frequency, cross …
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Micelle Enhanced Analytical Chemistry
… analyte, copper (II) ion, and two fluorescent probes, phenosafranin and N-methylacridone (NMA), was studied. The intensity of the fluorescence emission observed from these two probe molecules was monitored as a function of added copper (II) ion quencher and the data evaluated in terms of the …
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Spectroscopic and thermodynamic studies of supercritical fluid solutions containing a cosolvent
… have been used to study structure-specific probe molecules (2-naphthol, 5-cyano-2-naphthol, and 7-azaindole) in the supercritical fluids carbon dioxide, ethane, ethylene, and fluoroform, with water, methanol, and ethanol as cosolvents. In liquid solutions, these probes exhibit well …
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Shape-Selective Growth of Bimetallic Nanostructures
… nanostructures with interior gaps, in which SERS probe molecules were embedded. Such sandwich nanostructures are promising SERS-active substrates. In addition, the seed-mediated growth method was applied to control the deposition of Ag on Au bipyramids. By tuning the reaction kinetics, Au@Ag …
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Photophysics of hexanuclear [Re₆Q₈]²⁺ cluster compounds
… airflows, the development of pressure sensitive probes (PSP), molecules sensitive to the pressure of air at a surface, has drawn much attention and is an important area of research and development. Molecules that are currently used for these applications are typically emissive compounds whose …
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Decorating Crystallites with Atoms and Small Molecules: A First-Principles Investigation
… processes. Adsorption of noble gases and small probe molecules onto crystalline surfaces epitomizes physisorption. Due to its intricate nature, a delineation of the physical adsorption phenomenon is necessitated. This has led to an immense number of studies centralized on the basis of …
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Flow 1H Dynamic Nuclear Polarization Studies in Normal Liquids and Supercritical Fluid Carbon Dioxide
… nuclear polarization (DNP) experiments of small probe molecules (i.e. chloroform and benzene) were conducted in normal liquids (i.e. neat benzene, deuterated benzene, chloroform) and supercritical fluid CO₂. Initial data collected on the 14N NMR line width of acetonitrile in normal liquids and SF …
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Surface functionalisation of encoded SU-8 microparticles and their uses in multiplexed suspension biological assays
… the attachment of a range of biological molecules (e.g. proteins and peptides) onto the functionalised surfaces; and different on-bead analytical techniques for surface characterisation are described. From a thermodynamic study of a multiplexed immunoassay for immunoglobulins (Ig, MW ~150 …
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Preparation of 7-(p-Substituted-Benzylamino)-4-Nitrobenzoxadiazole Derivatives and the Study of their Fluorescent Properties in Solution
… has been used by others as a fluorescent probe to determine the conformation changes of bovine trypsinogen and bacterial libosomes. Fluorescent probes have been used to: (l) establish the degree of polarity of a particular region of a protein; (2) measure distances between groups in a …
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Organotellurium Reagents for Multiparametric Interrogation of Dynamic Biology
… to develop a MC-compatible activity-based probe using this tag that is able to report on cancer cell oxygenation levels. We demonstrate that this molecule can be used to discriminate single cells based on their exposure to oxygen, both in vitro and in vivo. By synthesizing “isotopologous” …
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Surface-Enhanced Vibrational Spectroscopies using Electrodeposited Anisotropic Gold Nanoparticles
… was used to determine the orientation of the probe molecules on the AuND during the desorption process. Over a wide range of applied potentials, only the N-bonded adsorption model/vertical-on motif was identified. A novel substrate consisting of a thin film ITO modified ZnSE internal …
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Understanding the Surface Induced Phosphorylation of Prebiotic Molecules by Schreibersite
… formic acid (HCO<sub>2</sub>H) and other molecules with the schreibersite surface at varying surface temperatures was probed by reflection absorption infrared spectroscopy (RAIRS) and temperature programmed desorption (TPD). At surface temperatures of approximately 130 K, H<sub>2</sub>O …
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Chemical modification of activated carbon adsorbents
… modified carbons have been investigated using probe molecules Including nitrogen, water, hexane, and chloropicrin, and the ageing characteristics of the carbons, and the factors controlling the adsorption of a model hydrophobic vapour from high humidity air have been studied. Directly …
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Design and Application of Probes of Novel Bioactivities
… In order to isolate specific enzymes probe molecules were developed in which a desired bioactivity resulted in the ‘switching on’ of a fluorophore during enzymatic processes. Several reactivity probes were synthesised which contained a fluorophore, a fluorescent quencher moiety and a …
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Combining Thin Film Silver Nanoparticles and Microfluidics to Create Reusable and Versatile Surface-Enhanced Raman Scattering Devices
… methyl orange and malachite green used as Raman probe molecules, citrate is used as a washing agent to show the reusable nature of these devices. Enhancement factors and limits of detection were calculated highlighting the enhancing ability of the devices but also leaving room for further …
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Hydrogen terminated silicon surfaces: Development of sensors to detect metallic contaminants and stability studies under different environments
… Nafion film embedded with dimethylglyoxime (DMG) probe molecules. The detection of Ni2+ was based on the appearance of a unique infrared absorption peak at 1572 cm-1 that corresponds to the C=N stretching mode in the nickel dimethylglyoximate, Ni(DMG)2, complex. The suitable operational pH range …
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Electrodeposited nanoparticles: properties and photocatalytic applications
… enhancements have been quantified using the probe molecules Trans-1,2-bis(4-pyridyl)ethylene (BPE) and [Os(bpy)2Qbpy]2+ respectively (where bpy is 2,2’-bipyridyl and Qbpy is 2,2’:4,4’’:4’4’’-quarterpyridyl). Spontaneously formed, densely packed monolayers of [Os(bpy)2PIC]2+ have been formed …
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