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 5593 for “"Extraction"”.
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Extraction of Capsaicin Using the Polyol Induced Extraction (PIE) Method
<p>Polyol-induced extraction (PIE) is an extraction technique for separating organic solvents from water, using glycerol and polyol as separating agents. Glycerol binds water releasing the organic solvent as a separate liquid phase. this thesis, investigates how the PIE process may be used to …
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Predispersed solvent extraction
A new solvent extraction method has been developed for the extraction of metal and organic ions from very dilute aqueous solutions. The new method, which has been named Predispersed Solvent Extraction (POSE), is based on the principle that 1 there is no need to comminute both phases. All that is …
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Comparison of Liquid-Liquid Extraction and Solid Phase Extraction of Mephedrone
… experiment focused on comparing liquid-liquid extraction to solid phase extraction to determine if there was a difference and which was more efficient. Synthetic urine samples were spiked with mephedrone, extracted using both methods, and analyzed with GC-MS. Spiked synthetic urine samples were …
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Oropharyngeal Airway Volume Following Orthodontic Treatment: Premolar Extraction Versus Non-Extraction
… methods of treatment. The first involves the extraction of teeth to gain the space needed for tooth alignment. The second relies on arch expansion to gain the space needed for correction. In recent decades, arguments for and against the extraction of teeth for orthodontic purposes have become …
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Oropharyngeal Airway Volume Following Orthodontic Treatment: Premolar Extraction Versus Non-Extraction
… methods of treatment. The first involves the extraction of teeth to gain the space needed for tooth alignment. The second relies on arch expansion to gain the space needed for correction. In recent decades, arguments for and against the extraction of teeth for orthodontic purposes have become …
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Focused Ultrasound Extraction (FUSE) for Formalin-Fixed, Paraffin Embedded (FFPE) DNA Extraction
… and clinical applications. However, FFPE DNA extraction presents unique challenges and requires lengthy incubation periods, which can be impractical for certain applications. Here, we propose the use of focused ultrasound extraction (FUSE) technology for improved DNA extraction from FFPE …
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Sparse Kernel feature extraction
… they can be improved upon by targeting feature extraction towards more specific problems. More recent work has been more focused and considers sparser formulations which potentially have improved generalisation. However, sparsity is not always efficiently implemented and frequently requires …
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Supercritical Carbon Dioxide Extraction
… and testing a supercritical CO<sub>2</sub> extraction apparatus that examines the use of supercritical CO<sub>2</sub> as a solvent in the extraction process of decaffeinating coffee. Due to the fact that supercritical CO<sub>2</sub> requires high pressure operating conditions, the apparatus …
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Directional solvent extraction desalination
… of the solvent in water. Directional solvent extraction may be considered a molecular-level desalination approach. Directional Solvent Extraction circumvents the need for membranes, uses simple, inexpensive machinery, and by operating at low temperatures offers the potential for using waste …
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Automated MOSFET parameter extraction
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Supercritical extraction of coal
Supercritical extraction of coal is removal of a select fraction of the coal by a solvent which is slightly above its critical temperature and above its critical pressure. The objective of this dissertation was to understand the mechanism of supercritical extraction, to test some promising …
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Treatment Outcomes and Stability in Extraction vs. Non-Extraction Adult Anterior Open Bite Patients
… to maintain. Some orthodontists utilize extractions to assist in bite closure. This study aims to explore whether extractions in adult patients with AOB lead to improved treatment outcomes and better long-term stability.Methods: The pre- and post-treatment records of adult orthodontic …
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A Framework for Extraction Plans and Heuristics in an Ontology-Based Data-Extraction System
<p>Extraction of information from semi-structured or unstructured documents, such as Web pages, is a useful yet complex task. Research has demonstrated that ontologies may be used to achieve a high degree of accuracy in data extraction while maintaining resiliency in the face of document changes. …
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Information Extraction from Scientific Literature
… bottleneck across research communities. Manual extraction of critical information---including methodologies, datasets, and domain-specific terminologies---now consumes a substantial proportion of researchers' literature review time, particularly impacting time-sensitive fields like climate …
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Heathland Restoration after Mineral Extraction
… of heathlands at a china clay mineral extraction site in the UK. Assessment of historical restoration practices revealed that previous work carried out on the study site is not achieving Atlantic Lowland Heath (ALH) and that specific amendments might be necessary. Consequently, work …
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Information extraction with weak supervision
… key challenges in three fundamental information extraction (IE) tasks: Named Entity Recognition (NER), Relation Extraction (RE), and Entity Linking (EL). Traditional supervised learning methods in these domains often require extensive human annotations, which are costly and time-consuming, …
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