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 166 for “"SPE"”.
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"Ps.-Seneca ""de Spe"" (Anth. Lat. 415 Riese): Prolegomena, Text, Translation, Commentary"
… Vossianus Latinus Quarto 86 (which contains De Spe) are described. The historical process by which the Senecan epigrams came to be attributed to Seneca is traced from Scaliger's editio princeps to the present. Attitudes toward Hope in Roman religion and popular belief are discussed, and De Spe's …
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The Reported Activities and Beliefs of the Students Preparing for the Specialised English Test (SPE).
… effect' of a high stakes test known as the Specialised English Test (SPE) which is used to admit English-major applicants into English departments at universities in Iran. A belief commonly held about the SPE Test is that students admitted to university since its introduction in 2002 have …
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Extraction and analysis of pharmaceutical residues in environmental samples using SPE with LC-MS/MS
… contamination based upon solid phase extraction (SPE) and liquid chromatography mass spectrometry (LC-MS). Monolithic silica based stationary phases were used for the development of high performance liquid phase separations of common pharmaceuticals, the antifouling and anti-dandruff agent zinc …
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Rollback-able Random Number Generators For The Synchronous Parallel Environment For Emulation And Discrete-event Simulation (spe
… for Emulation and Discrete-Event Simulation (SPEEDES) environment developed by NASA. These rollback-able random number generators will also add several statistical distribution models to the already rich SPEEDES library.
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Development of a liquid-liquid, solid-phase extraction (SPE), LC-MS/MS analytical method for qualitative and quantitative drug residue analysis in white-tailed deer
… chromatography (LC) coupled to tandem mass spectrometry (MS/MS). In this dissertation, a brief synopsis of the methodology, instrumentation, sample preparation methods and critical parameters for an analytical method validation will be discussed, as well as, the work flow of liquid …
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Comparison of Supported Liquid Extraction and Solid Phase Extraction of Methamphetamine from Urine and Method Validation by Gas Chromatography-Mass Spectrometry
… traditional LLE (liquid-liquid extraction) and SPE (Solid phase extraction). This work will compare the extraction efficiencies between SLE and SPE for methamphetamine from urine with detection and quantitation using GC-MS (gas chromatography- mass spectrometry). The SLE cartridges provide …
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Sacral preauricular extensions and notches and dorsal pubic pitting as indicators of parity
… the presence of sacral preauricular extensions (SPE), sacral preauricular notches (SPN), and dorsal pubic pitting (DPP) on the sacra and pubic bones of modern assigned females at birth (AFAB; parous=150; non-parous=97) and assigned males at birth (AMAB; n=150) from the University of Tennessee, …
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Sujeto pronombre expreso en el Español Colombiano de Filadelfia: variación y sintaxis unificada
El sujeto pronombre expreso (SPE) es una variable variacionista que se ha estudiado en múltiples comunidades hispanas y bilingues con español. (Ana M. Carvalho et al., 2015). Los estudios del SPE buscan entender la frecuencia relativa de pronombres expresos y nulos dependiendo de contextos …
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Analysis of disinfection by products in drinking water by solid phase extraction
… of this research were to develop a broad spectrum method for the extraction, concentration, and analysis of drinking water disinfection by products using solid phase extraction (SPE), and to determine if this method had lower detection limits and less variability than the proposed …
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Separation and quantification of fourteen chemical forms of fat soluble vitamins in food matrices using solid phase extraction coupled with liquid chromatography – mass spectrometry
A solid-phase extraction (SPE) method was developed for separation and quantification of vitamin A (retinol, beta-carotene, retinyl-palmitate, retinyl-acetate), vitamin D (D2, D3), vitamin E (alpha,beta,gamma,delta tocopherols, tocopheryl-acetate), and vitamin K (K1, K2, K3) from different food …
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APPLICATION OF LAYERED DOUBLE HYDROXIDES IN SOLID-PHASE EXTRACTION
… preparation methods, solid-phase extraction (SPE) is one of the most popular techniques. It has been in use for many decades and yet is able to meet new challenges, such as minimization solvent and sorbent specifically and improvement in the work flow of laborious operations. Nevertheless, …
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Coupled solid phase extraction-supercritical fluid extraction on-line gas chromatography of explosives from water
… styrene-divinylbenzene (SDVB); and one Bakerbond spe*™ Phenyl stationary phase. The phenyl sorbent yielded the highest recoveries. The average SPE recoveries for spike standards ranged from 80 to 95 percent for Millipore water and 55 to 95 percent from well and surface water in the low ppb and ppt …
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Interpersonal Dynamics of Volunteers for a Simulated Prison Study, General Psychological Study, and a Helping-Behavior Study
The Stanford Prison Experiment (SPE) is one of the most studied and celebrated studies within social psychology. The results have long been attributed to the power of the situation and the roles that were given to the participants. The present study was based on research concerning how personality …
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Biofilm-related Materials as Total N-nitrosamine (TONO) Precursors and Hydroxylamine-based Interferences in TONO and N-nitrosodimethylamine (NDMA) Measurements
… was adapted to include a solid-phase extraction (SPE) step to assess the role of biologically derived materials as N-nitrosamine precursors. Methanol was determined to be a suitable solvent for the SPE-TONO assay, with N-nitrosodimethylamine (NDMA) losses estimated to be 30% by SPE alone and an …
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Comparison of Liquid-Liquid Extraction and Solid Phase Extraction of Mephedrone
… that there is less than a 5% chance that LLE and SPE are the same for extracting mephedrone. The t ratios for extracting 0.5μg/mL via LLE and SPE were 5.567 and 6.542, which were above the level of significance t value 2.086. After determining that the methods were statistically different, the …
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Experimental Design Optimization and Thermophysical Parameter Estimation of Composite Materials Using Genetic Algorithms
… and Simultaneous Parameter Estimation (SPE). Because of their advantageous features, Genetic Algorithms (GAs) were investigated for use as a strategy for both EDO and SPE. The EDO and SPE approaches used involved the maximization of an optimality criterion associated with the sensitivity …
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Comparative Analysis of Electrodynamic Toroidal Radiation Shielding Configurations
… our Sun in the form of Solar Particle Events (SPEs), and from outside the solar system in the form of Galactic Cosmic Rays (GCRs). The harm these particles do can be reduced or mitigated outright through radiation shielding. Because protons and other charged particles comprise most of these …
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Evaluation of SPEC®•Microcolumns for the extraction of ranitidine from urine
Solid phase extraction (SPE) has become a popular sample preparation method for the extraction of analytes from complex matrices. Solid phase extraction overcomes such disadvantages as large solvent usage and waste, large amounts of time spent in sample preparation and labor intensive methods with …
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Development of chemosensors for endocrine disrupting chemicals (EDCs): synthesis and evaluation of solid-phase bound receptors
… analysis. In general, solid-phase extraction (SPE) of aqueous samples is a widly applied technique to enrich pollutants. With the current SPE cartridges, the extraction efficiency of the pollutants depends on their polarity. Thus polar compounds stay in the water sample while apolar compounds …
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