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 33 for “"Hot-stage microscopy"”.
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Co-crystal screening of poorly water-soluble active pharmaceutical ingredients. Application of hot stage microscopy on curcumin-nicotinamide system and construction of ternary phase diagram of fenbufen-nicotinamide-water co-crystal system.
… a co-crystal was ascertained from DSC, Kofler hot stage screening and PXRD, and all confirmed a new crystal phase could have been formed between curcumin and a co-crystallizing agent, nicotinamide. We report that re-crystallization step essentially aids the purification of commercial curcumin, …
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Melting point depression in biodegradable polyesters
… exotherm to be detected by the DSC, therefore hot-stage microscopy was used as an alternative method to characterise the crystallisation behaviour. Light intensity with time during isothermal crystallisation of a thin polymer film (<15μm) was measured. The results were normalised in order to …
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Crystal engineering of novel organic-inorganic compounds of N- and O-donor dipyridyl ligands
… 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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Preparation and Evaluation of Cefuroxime Axetil Gastro-Retentive Floating Drug Delivery System for Improved Delivery via Hot-Melt Extrusion Technology
… in the gastro intestinal tract utilizing hot-melt extrusion technology for improved absorption. </p><p>Methods: Preliminary studies were performed to select the appropriate lipids. Selected ratios of CA and lipids were extruded using a twin screw hot-melt extruder. Extrudates obtained were …
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Structures and thermal stability of selected organic inclusion compounds
… scanning calorimetry, thermogravimetry and hot-stage microscopy.
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Studies of blends containing liquid crystalline polymers with PET and related investigations of hydroquinone/biphenol polysulfone systems
… Along these lines, thermal analysis, polarizing hot-stage microscopy, wide angle x-ray scattering and mechanical testing were utilized in this investigation
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The design and characterisation of multiparticulate lipidic systems for oral drug delivery
… was unsuccessful and led to the development of a hot-melt spray system. To characterise and validate the hot-melt spray system, OFAT and experimental design approaches were utilised. The process proved to be robust and reproducible in the production of sprayed wax granules. A stability study of …
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Structures and thermal analyses of Werner clathrates and coordination polymers
… scanning calorimetry, thermogravimetry and hot-stage microscopy.
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Physicochemical study of inclusion of drug molecules in cyclodextrins
… features of the complexes. Ultraviolet spectrophotometry, elemental analysis and thermogravimetric analysis were the principal techniques used for determination of composition. Hot stage microscopy, differential scanning calorimetry and thermogravimetric analysis were the principal techniques …
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Supramolecular derivatives of selected bioactive compounds : a physicochemical study
… the thermal behaviour of the products included hot stage microscopy, differential scanning calorimetry and thermogravimetric analysis. UV spectrophotometry and elemental analysis were used for hostguest stoichiometric assay and purity determination respectively. X-ray powder diffraction and …
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Physico-chemical properties of polypropylene glycols
… high sensitivity scanning calorimetry (HSDSC), hot stage microscopy, small angle neutron scattering, and turbidity measurements. The data suggest that phase separation is a consequence of PPG aggregation (droplets); the aggregates grow in size, as the temperature is raised further. It is …
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Crystal engineering of dynamic metal organic frameworks for applications in chromic sensing and capturing of small molecules
… powder X-ray diffraction (PXRD) studies and by hot stage microscopy (HSM). Thermochromic and solvatochromic properties of the activated phases were investigated by spectroscopic techniques. Dynamic motion of the networks upon guest loss and absorption by activated phases were evaluated by single …
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Synthesis and Characterisation of Porous Mixed-Ligand Metal-Organic Frameworks for Sorption Studies
… using thermogravimetric analysis (TGA) and hot stage microscopy (HSM). SCXRD revealed that LMMOF01 and LMMOF03 are 3-D, LMMOF02 is 2-D while LMMOF04 and LMMOF05 are 1-D. The 2-D and 3-D MOFs possess channels that are occupied by the solvent molecules. The porosity of the MOFs was tested …
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Crystal engineering of mixed-ligand metal-organic frameworks based on simple carboxylate and bipyridyl ligands
… crystal and powder) and thermal analyses (hot stage microscopy, differential scanning calorimetry and thermogravimetric analysis).
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Crystal engineering and sorption studies of cyclotriveratrylene and C-methylcalix[4]resorcinarene solvates
… X-ray diffraction, powder X-ray diffraction, hot stage microscopy and thermal analysis. All compounds were shown to maintain crystallinity upon heating and desolvation – however, several transitioned through an amorphous phase. Gas and vapour sorption analysis was performed on all activated …
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Synthesis and characterisation of new multi-component compounds containing the non-steroidal anti-inflammatory drugs fenbufen and S(+)-ibuprofen
… (SCXRD), powder X-ray diffraction (PXRD), hot stage microscopy (HSM), Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA) and proton nuclear magnetic resonance (1H NMR) spectroscopy. The synthesis of metal salts of …
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Separation by enclathration
… thermogravimetry, differential thermal analysis, hot stage microscopy and differential scanning calorimetry. The kinetics of enclathration of certain guests in the vapour phase were investigated using an automated magnetic suspension balance. The interaction potential of a series of guests was …
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A Thermogravimetric Study of the Pyrolytic Behaviour of South Wales Coals
… This aim was successfully realised. <br/><br/>Hot-Stage- Microscopy was used to provide qualitative information about the physical changes the samples underwent during pyrolysis. This information was used to aid the interpretation of the thermogravimetric results. <br/><br/>Thermogravimetric …
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A study of the phase transitions of sugars found in chocolate
… on the crystallisation of both sugars. Hot stage microscopy was utilised to jtnomtor the phase changes during crystallisation upon heating. DoE work showed that a shortage of water during crystallisation of sucrose led a higher crystallisation temperature T t. This finding supports the …
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Porous metal-organic frameworks for sorption of volatile organic compounds
… analysis, differential scanning, hot stage microscopy, powder X-ray diffraction, infrared spectroscopy, and proton viii nuclear magnetic resonance (1H NMR) analysis. This thesis also reports the effect of methanol on discrete complexes of …
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