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 17 of 17 for “"Concentration Method"”.
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Development of an inline cleaning procedure and a concentration method for analyzing low levels of organophosphate flame retardants and plasticizers in sediment
… surrogate standard, and extracted. This inline method minimizes transfer and exposure of diatomic earth and aluminum oxide with possible sources of OPFPs in the laboratory. The recovery efficiency of several concentration methods, including slow evaporation in a fume hood to dryness, fast …
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Gas assisted injection moulding: Experiment and simulation. Industrial machine experimental studies of the effect of process variables on gas bubble formation, and with simulation based upon a pseudo-concentration method.
… A 3D fi nite element implementation of a pseudo concentration method is employed to simulate the primary penetration of the gas bubble. The wall thickness prediction is an important result since the extent of bubble penetration is sensitive to the remaining melt fraction. A number of methods for …
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Zooplankton phytoplankton interactions in the San Joaquin River, Ca
… Algae have been shown to significantly impact DO concentrations in the Deep Water Ship Channel (DWSC) of the San Joaquin River (SJR) estuary. Zooplankton grazing is one of the important mechanisms that influence the fate and spatial distribution of algae, and therefore, may contribute to DO …
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Marine Biogeochemistry Studies of Iron and Hydrogen Peroxide using Flow Injection-Chemiluminescence
… investigate marine processes. Two flow injection methods, one based on direct sample injection and another involving the preconcentration of iron, were used to determine iron(II) and dissolved iron and assess potential interference from a number of metals and H202. The results demonstrated the …
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Development of a reverse osmosis/electrodialysis process to concentrate natural organic matter
… of this project is to develop and optimize a NOM concentration method using a sequential reverse osmosis(RO)/electrodialysis(ED) treatment system that can be used for toxicity studies. This work focuses on data comparison from two methods of NOM concentration and two sources of sample water, …
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Evaluation of pre-concentration techniques for gas chromatographic determination of low amounts of volatile contaminants and degradation products
The project investigated the compared two pre-concentration methods, Thermal Desorption System (TDS) coupled to a Thermal Extractor (TE) and Multiple Headspace Injection (MHI) using a Multiple Purpose Sampler (MPS) for detecting volatile amines in solid pharmaceutical products and synthesis …
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Determination of low bacterial and viral concentrations in water and selective removal of pathogenic bacteria in water filtration systems
… and removal is needed. In this research, new methods using lanthanum-based chemical flocculation for concentration of bacteria and virus in water was successfully developed. The results showed that compared to traditional flocculants, LaCl3 had the highest recovery efficiencies for bacteria …
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Paleoparazitologija Vilniaus archeologiniuose objektuose /
… in Vilnius Old Town by paleoparasitological methods; the results of the study were compared with the results of paleoparasitological and medical parasitology studies of other researchers. Archaeological soil samples of Vilnius Old Town were examined by the ZnSO4 flotation method, and it was …
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Numerical stimulation of stress-induced crystallization of injection molded semicrystalline thermoplastics
… stress-induced crystallization model. A pseudo-concentration method was used to track the melt front advancement. The simple Maxwell stress relaxation model in combination with WFL equation was used to investigate the importance of stress relaxation on the development of crystallinity during the …
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Conformational Studies on Alicyclic Alcohols
… known that intermolecular hydrogen-bonding is concentration dependent. It is also known that the H chemical shift of an hydroxyl proton is dependent upon concentration. H NMR spectroscopy has therefore been used to study hydrogen-bonding in solution.<br/><br/>It was found previously by Becker, …
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Human Norovirus in Artificial and Environmental Marine Water: Development of Antibody Based Rapid Methods
… Gulf Coast. We developed a filtration and concentration method for the detection of NoV from oyster harvesting waters. Lastly, this body of work compares commonly used molecular techniques (RT-PCR) and a commercial enzyme immunoassay for the detection of NoV. One oyster sample was positive …
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An Alternative Method to Concentrate E. coli O157:H7 from Meat Homogenates to Facilitate Detection by Cultural and Molecular Methods
… illness per year. Sensitive and efficient methods to detect this organism are crucial. Current bacterial concentration methods from foods, such as centrifugation and filtration, are problematic, often co-precipitating or becoming clogged with food particulates. Metal hydroxide concentration …
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Resin-based method for concentration of enteric viruses and F-RNA coliphages from water samples
… and F-RNA coliphages are often present at low concentrations in contaminated waters; therefore rapid, sensitive and cost effective viral concentration methods applicable to different environmental water samples are needed for an accurate assessment of water microbiological safety. Here, a …
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COVID-19 and Wastewater-based Epidemiology: A flexible approach to monitoring SARS-CoV-2 and its variants in Trentino wastewater to support the Health Authorities
… we moved on to the evaluation of the viral concentrations in the sewage system and the wastewater entering the WWTP. The possibility of a faecal-oral transmission route of the virus was investigated by evaluating the data about viability and infectivity in wastewater. The natural processes …
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A generic pathogen capture technology for sepsis diagnosis
… will review the field of sepsis diagnostics and methods that have been employed to confront this challenge. In Chapter 2, I describe the development of a natural human opsonin - Mannose Binding Lectin (MBL) - as a generic pathogen capture molecule. MBL is found in human blood and is part of the …
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Improvement in Orientation Predictions of High-Aspect Ratio Particles in Injection Mold Filling Simulations
… rheological data under startup of shear. Pseudo-concentration method was implemented for the modeling of the advancing front and fountain flow effects in the region near the front. Discontinuous Galerkin finite element method and a third order Runge-Kutta total variance diminishing time …
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A Dramatic Interpretation of Jake's Women Thesis in An Educational Setting
<p>The area of investigation in the <em>Jake's Women's</em> thesis resides with the actor's preparation in the portrayal of a character who struggles with the pain of loss and betrayal. The acting technique explored centers around the psychology behind the emotional and physical aspects of acting. …