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 110 for “"FID"”.
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Development of a micro-FID using a diffusion flame
A micro-flame ionization detector (micro-FID) was developed operating with a diffusion flame with a folded flame structure. Unlike conventional FIDs, an air-hydrogen diffusion flame was developed and tested in an encapsulated structure of Quartz-Macor®-Quartz layers. Diffusion flames are generally …
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Analysis of Biogenic Amines by GC/FID and GC/MS
… biogenic amines in fish at trace levels using GC/FID. The derivatizing reagent used in the experiments was propyl chloroformate, useful for aqueous samples. To confirm the identity of six derivatized biogenic amines GC/MS was used. To our knowledge no reference spectra for these derivatives has …
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Measurement of total hydrocarbon emissions with MEMS using a portable FID and a novel exhaust flow meter
The objective of this study was to evaluate tools for in-field, on-board engine emissions measurements, namely, a Signal Model 3030PM hydrocarbon analyzer and McCrometer's V-Cone flow meter. The Signal Model 3030PM analyzer uses a heated flame ionizing detection scheme to measure hydrocarbons. The …
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Development of a headspace solid-phase microextraction (HS-SPME) procedure for the determination of short-chain fatty acids (SCFAs) in activated sludge by GC-FID
<p>The process of wastewater treatment includes the removal of inorganic solids such as sand and gravel as well as organic materials, phosphorus, and nitrogen. Activated sludge, containing a variety of living organisms, is added into the wastewater treatment system. Short-chain fatty acids (SCFAs), …
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How air temperature affects flight initiation distance in arid-zone birds
… to predators. The flight initiation distances (FID), i.e. the distance from a predator when the prey initiates escape, of eight bird species in the Kalahari were measured over a range of air temperatures during October and November 2015. The results from this study show a negative relationship …
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Behavioral differences in urban Sciurus carolinensis with varying human exposure as a model for synanthropic human-animal relationships
… and feeding surveys. Flight initiation distance (FID) measures the distance at which S. carolinensis begins to flee from an approaching predator or threat and helps us better understand how prey organisms measure threats and assess the trade-offs of the conflicting demands for the need to forage …
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High-resolution virtual try-on with garment extraction using generative adversarial networks
… Score (IS), Fréchet Inception Distance (FID), and Kernel Inception Distance (KID) assessed the model's prowess. Benchmarked against HR-VITON, ACGPN, and CP-VTON, our model slightly trailed HR-VITON but notably surpassed ACGPN and CP-VTON. In realistic, unpaired conditions, the model …
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Chirped-pulse millimeter-wave spectroscopy, dynamics, and manipulation of Rydberg-Rydberg Transitions
… transitions re-radiate free induction decay (FID) at their resonant frequencies, and the FID is heterodyne-detected by the CPmmW spectrometer. Data collection and averaging are performed in the time domain. The spectral resolution is ~100 kHz. Because of the large transition dipole moments, …
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Evaluation of Initial Flavor Fade in Fresh Roasted Peanuts using Gas Chromatography-Flame Ionization Detection, Gas Chromatography-Olfactometry, Sensory Analysis, and Chemosensory Techniques
… from oxidation were also evaluated using GC-FID to quantify and identify the pyrazines and hexanal over a 21 day storage period. Electronic Nose was used to determine differences between storage periods. Gas chromatography-Olfactometry identified potent pyrazines contributing to fresh roasted …
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The development of physico-chemical quality control methods for Haemophilus influenzae type b vaccine production
… with flame ionisation detection (GC-FID) is a conventional technique used for the analysis of volatile analytes. The analysis of process residuals ethanol and ethylene glycol were performed using headspace or direct injection GC-FID analysis. Ethylene glycol, a non-volatile solvent, …
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Synonymous question generation: Learning to ask in different ways using variational autoencoders
… questions via the Fre'chet InferSent Distance (FID) and the Multiset-Jaccard-k-gram (MS-Jaccard-k) Measure, two joint diversity-quality metrics, demonstrates that the proposed model is able to produce fluent questions that accurately capture variations in questions associated with KG triples. …
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Appraisal and validation of rapid, integrated chemical and biological assays of environmental quality
… biological markers to assess pollution. GC-ECD/FID/MS have been used to investigate the status of chemical contamination of the Black Sea by organochlorine residues, hydrocarbons and faecal sterols. Useful information is provided and problems with e.g. HCHs and sewage contamination are …
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Análise da Classificação Decimal Universal (CDU) e os esforços que estão sendo realizados para a sua transformação em linguagem universal de informação científica
… reform, partly based on proposals presented to FID by its Committees. Emphasis was given to the structural roots of UDC, as well as to its rich contents which can be utilized in its reformulation.
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Method Development And Applications To Screening And Characterization Of Rrna-Targeting Small Molecules
… in the ligand identification process, a modified FID assay for screening RNA-binding ligands was established using 3-methyl-2-((1-(3-(trimethylammonio)propyl)-4-quinolinylidene)methyl)benzothiazolium (TO-PRO) as the fluorescent indicator. ESI-MS results provide direct evidence that correlates the …
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Exploring large coherent spin systems with solid state NMR
… of the problem of the NM:R free induction decay (FID) in a lattice of spin 1/2 nuclei is presented to verify the multi-spin nature of the FID and the dominant role of the geometrical arrangement of the spins in the development of higher order correlations under the dipolar evolution. To study the …
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Stanovení vonných látek s alergenními účinky
… V praktické části je využita metoda SPME-GC-FID ke stanovení vonných látek s alergenními účinky ve vybraných kosmetických přípravcích (přírodní krémy a toaletní vody).
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Development and experimental analysis of a micro-flame ionization detector for portable gas chromatographs
A portable micro-FID has been developed that utilized a diffusion flame encased in a micro-fabricated SOI structure. The micro-flame was fueled by a portable electrolyzer that provided the hydrogen and oxygen flow rates necessary for the device operation. The micro-FID was able to detect organic …
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The effects of student field dependence on college students' ratings of instruction
… suggested that field-independence-dependence (FID), a dimension of cognitive style, may be a biasing factor in student ratings of instruction. This study experimentally investigated the extent to which field-dependent (FD) and field-independent (FI) students differentially perceived a lecture …
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