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 62 for “"thermogravimetry"”.
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Lubricant oil consumption effects on diesel exhaust ash emissions using a sulfur dioxide trace technique and thermogravimetry
A detailed experimental study was conducted targeting lubricant consumption effects on ,diesel exhaust ash levels using a model year 2002 5.9L diesel engine, high and low Sulfur commercial lubricants, and clean diesel fuels. Regulatory decreases in allowable particulate matter emissions for on road …
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Structure and decomposition of diol inclusion compounds
… ratios were determined by programmed temperature thermogravimetry. Two of the four molecular structures were elucidated using single crystal X-ray diffraction. All the inclusion compounds were also characterised by differential scanning calorimetry, hotstage microscopy and Xray powder diffraction. …
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Inclusion compounds of multipedal hosts
… of these compounds was investigated using thermogravimetry and differential scanning calorimetry. The kinetics of desolvation for some of the inclusion compounds was determined using isothermal thermogravimetry. Rate laws describing the desolvation mechanisms are ascribed, and the …
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Simultaneous nanothermal analysis using heated microcantilevers
… of a microsensor to perform calorimetry and thermogravimetry simultaneously. These techniques were used to investigate thermal dependencies for two studies. The first study discusses nano-thermogravimetry and calorimetry on a 250 pg coal sample. Heat flow and mass change of the sample was …
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Crystal engineering of novel organic-inorganic compounds of N- and O-donor dipyridyl ligands
… by x-ray diffractometry. Thermal analysis (thermogravimetry (TG), differential scanning calorimetry (DSC) and hot stage microscopy (HSM)) was used to determine the thermal behaviour of these compounds. Microanalysis was used to confirm elemental composition.
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Inclusion properties of hydroxy host compounds
… of the inclusion compounds was studied by Thermogravimetry (TG) and Differential Scanning Calorimetry (DSC), to determine the forces holding the guest within the structure and the changes in the host lattice as the guest was desorbed. X-ray powder diffraction methods were also used to …
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Structure and reactivity of selected organic inclusion compounds
… either by differential scanning calorimetry or thermogravimetry. The structures of the inclusion compounds were reconciled with their physico-chemical properties.
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Synthesis and characterization of poly-(p-phenylene pyromellitamic acid)
… polymer was found to occur within one minute. Thermogravimetry of the solid poly(amic acid)s was used in a method developed to determine the amount of associated dimethylformamide, to study the cyclization of poly(amic acid) to polyimide, and to study the decomposition of the polyimide in air …
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Evaluation of the Potential Expansion Mechanisms of Bottom Ash in Unbound Sub-base Materials
… examination, magnetic separation analysis, Thermogravimetry, Scanning Electron Microscopy and accelerated chemical reactions.<br/>Results showed that expansion appears to be through two mechanisms, unpredictable relaxation of compacted material and more notably the formation of expansive …
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Structures and thermal stability of selected organic inclusion compounds
… including differential scanning calorimetry, thermogravimetry and hot-stage microscopy.
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Fundamental experiments on the response of solutions, polymers, and modified polymeric materials to electromagnetic radiation
… time domains. These data were complemented by thermogravimetry (TG), thermogravimetry-mass spectrometry (TG-MS), and thermomechanical analysis (TMA). The isothermal desorption of volatiles (150 - 165°C) could be monitored by either mechanical, dielectric, or gravimetric techniques. The …
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Tuneable graphite intercalates for hydrogen storage
… primarily using neutron scattering and thermogravimetry, of potassium and calcium-GICs with hydrogen. Inelastic neutron scattering on hydrogenated KC24 has shown hydrogen sorption in this system to be quantitatively different from its analogues RbC24 and CsC24. A consistent model of the …
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Studies on the thermal decomposition behaviour, kinetics and electrical conductivity of the non-isothermal decomposition of pyridine mono carboxylic acids and some of their transition metal complexes
… free ligands in air has been studied by means of thermogravimetry (TG), derivative thermogravimetry (DTG), and differential scanning calorimetry (DSC) measurements. The behaviour of thermal decomposition of the three free ligands was not identical Finally, a computer program has been used for …
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Clathration by diol hosts : thermodynamics and structure
… methods. Thermal decomposition studies using thermogravimetry and differential scanning calorimetry (DSC) were carried out in order to relate the strength of the host-guest interactions to the structures of the inclusion compounds. Owing to practical limitations, the DSC technique is not …
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Structures and thermal analyses of Werner clathrates and coordination polymers
… including differential scanning calorimetry, thermogravimetry and hot-stage microscopy.
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Aplicação de termogravimetria acoplada à espectrometria de massas para caracterização de petróleo e determinação da curva de evolução de gás sulfídrico
… The first one is to characterize the oil by thermogravimetry coupled with mass spectrometry (TG-MS), and correlate these results with from other types of characterizations data previously informed. The second is to use the technique to develop a methodology to obtain the curve of evaluation …
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Desenvolvimento de antisséptico bucal em pastilha para prevenção da cárie dental
… differential scanning calorimetry (DSC), thermogravimetry(TG) and differential thermal analysis (DTA); and mid-infrared (FTIR) and near-infrared(FT-NIR) spectroscopy. The pharmacotechnical characteristics of the mixture of thecomponents in powder form and the physicochemical and …
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Separation of close isomers by enclathration
… studied, using isothermal and non-isothermal thermogravimetry. These experiments yielded the kinetic models as well as the activation energies of the desolvation reactions. Competition experiments were performed to determine which isomers of the compounds mentioned above were enclathrated …
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The influence of particle size on the chemistry of mica clays
… (EPMA), transmission electron microscopy (TEM), thermogravimetry, specific surface area analysis, and ion exchange. Books of biotite and muscovite were reduced to clay size « 2.0 μm) particles by mechanical comminution, then further fractionated into coarse (0.2-2.0 μm), medium (0.08-0.2 μm), …
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Applications of ultrasound in pharmaceutical processing and analytics.
… characterised using powder X-ray diffraction, thermogravimetry analysis, differential scanning calorimetry, scanning Electron Microscopy, dielectric spectroscopy and high performance liquid chromatography, rotational rheology, fourier transform infrared spectroscopy and near infrared …
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