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- Title
- IMPACT OF OMEGA-3 FATTY ACID SUPPLEMENTATION ON BASELINE LEVELS OF INFLAMMATORY MARKERS IN THE GENERAL POPULATION.
- Creator
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Nhan, Alex, Borgon, Robert, University of Central Florida
- Abstract / Description
-
Inflammation is a complex physiological response normally initiated by the innate immune system, often as a response to exposure to otherwise harmful stimuli. While generally useful in humans as a protective response to foreign matter, chronically elevated quantities of associated inflammatory factors C-reactive protein, TNF-alpha, IL-6, and IL-1beta have been linked in literature with decreased overall lifespan and well-being in humans via inflammatory processes. It is possible that by...
Show moreInflammation is a complex physiological response normally initiated by the innate immune system, often as a response to exposure to otherwise harmful stimuli. While generally useful in humans as a protective response to foreign matter, chronically elevated quantities of associated inflammatory factors C-reactive protein, TNF-alpha, IL-6, and IL-1beta have been linked in literature with decreased overall lifespan and well-being in humans via inflammatory processes. It is possible that by lowering these associated factors, increased well-being and lifespan may be experienced by the general population. One common health supplement with such promise is fish oil, which, through compounds eicosapentaenoic acid and docosahexaenoic acid, has been observed to decrease levels of secreted inflammatory markers in cell culture. In addition, molecular pathways have since been discovered which demonstrate possible means for which this physiological response may occur. However, despite the promise of such health benefits, studies attempting to discern the impact EPA/DHA supplementation has on inflammatory markers within humans have since emerged with mixed results. The aim of this study is to provide a meta-analysis across a number of studies to determine whether or not an impact exists through EPA/DHA supplementation in healthy populations, and if one exists, to what degree the respective inflammatory factors may be lowered.
Show less - Date Issued
- 2017
- Identifier
- CFH2000246, ucf:46031
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000246
- Title
- FORENSIC ANALYSIS OF C-4 AND COMMERCIAL BLASTING AGENTS FOR POSSIBLE DISCRIMINATION.
- Creator
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Steele, Katie, Sigman, Michael, University of Central Florida
- Abstract / Description
-
The criminal use of explosives has increased in recent years. Political instability and the wide spread access to the internet, filled with "homemade recipes," are two conjectures for the increase. C-4 is a plastic bonded explosive (PBX) comprised of 91% of the high explosive RDX, 1.6% processing oils, 5.3% plasticizer, and 2.1% polyisobutylene (PIB). C-4 is most commonly used for military purposes, but also has found use in commercial industry as well. Current methods for the forensic...
Show moreThe criminal use of explosives has increased in recent years. Political instability and the wide spread access to the internet, filled with "homemade recipes," are two conjectures for the increase. C-4 is a plastic bonded explosive (PBX) comprised of 91% of the high explosive RDX, 1.6% processing oils, 5.3% plasticizer, and 2.1% polyisobutylene (PIB). C-4 is most commonly used for military purposes, but also has found use in commercial industry as well. Current methods for the forensic analysis of C-4 are limited to identification of the explosive; however, recent publications have suggested the plausibility of discrimination between C-4 samples based upon the processing oils and stable isotope ratios. This research focuses on the discrimination of C-4 samples based on ratios of RDX to HMX, a common impurity resulting from RDX synthesis. The relative amounts of HMX are a function of the RDX synthetic route and conditions. RDX was extracted from different C-4 samples and was analyzed by ESI-MS-SIM as the chloride adduct, EI-GC-MS-SIM, and NICI-GC-MS. Ratios (RDX/HMX) were calculated for each method. An analysis of variance (ANOVA) followed by a Tukey HSD allowed for an overall discriminating power to be assessed for each analytical method. The C-4 processing oils were also extracted, and analyzed by direct exposure probe mass spectrometry (DEP-MS) with electron ionization, a technique that requires less than two minutes for analysis. The overall discriminating power of the processing oils was calculated by conducting a series of t tests. Lastly, a set of heterogeneous commercial blasting agents were analyzed by laser induced breakdown spectroscopy (LIBS). The data was analyzed by principal components analysis (PCA), and the possibility of creating a searchable library was explored.
Show less - Date Issued
- 2007
- Identifier
- CFE0001805, ucf:47358
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001805
- Title
- The Colonial Legacy of Environmental Degradation in Nigeria's Niger River Delta.
- Creator
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England, Joseph, Walker, Ezekiel, Lyons, Amelia, Sacher, John, University of Central Florida
- Abstract / Description
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Nigeria's petroleum industry is the lynchpin of its economy. While oil has been the source of immense wealth for the nation, that wealth has come at a cost. Nigeria's main oil-producing region of the Niger River Delta has experienced tremendous environmental degradation as a result of decades of oil exploration and production. Although there have been numerous historical works on Nigeria's oil industry, there have been no in-depth analyses of the historical roots of environmental degradation...
Show moreNigeria's petroleum industry is the lynchpin of its economy. While oil has been the source of immense wealth for the nation, that wealth has come at a cost. Nigeria's main oil-producing region of the Niger River Delta has experienced tremendous environmental degradation as a result of decades of oil exploration and production. Although there have been numerous historical works on Nigeria's oil industry, there have been no in-depth analyses of the historical roots of environmental degradation over the full range of time from the colonial period to the present. This thesis contends that the environmental degradation of Nigeria's oil producing region of the Niger Delta is the direct result of the persistent non-implementation of regulatory policies by post-independence Nigerian governments working in collusion with oil multinationals. Additionally, the environmental neglect of Nigeria's primary oil-producing region is directly traceable back to the time of colonial rule. Vital to this argument is the view that the British colonial state created the economic institutions which promoted Nigerian economic dependency after independence was achieved in 1960. The weakness of Nigeria's post-colonial dependent system is exposed presently through the continued neglect of regulatory policies by successive post-colonial Nigerian governments.
Show less - Date Issued
- 2012
- Identifier
- CFE0004534, ucf:49251
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004534
- Title
- DECISIVE MOMENTS IN FICTION.
- Creator
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Corrado, Janae, Hall, Scott, University of Central Florida
- Abstract / Description
-
I approach artmaking with a sense of intrigue, portraying the human condition as seen through my own eyes. The results that surface are female forms combined with subliminal subjective symbolism a fusion of my personal experiences and influences created through a partially subconscious process. I use this artistic process to help me understand myself and I dare my viewers to seek their own answers within the implied narratives I choose to paint.
- Date Issued
- 2009
- Identifier
- CFE0002541, ucf:47645
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002541
- Title
- THE IMPACT OF OIL PRICE SURGES ON ECONOMIC GROWTH.
- Creator
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Restrepo, Valeria, Hofler, Richard, University of Central Florida
- Abstract / Description
-
The objective of this research concerns identifying whether or not there is a relationship between oil price increases in a given quarter and the likelihood of a recession in the subsequent quarter. The data used is gathered from the St. Louis Fed Fred II, the National Bureau of Economic Research, and the Energy Information Administration to generate modified variables. These variables are tested using a qualitative dependent variable, recession, in a binary choice model. The findings...
Show moreThe objective of this research concerns identifying whether or not there is a relationship between oil price increases in a given quarter and the likelihood of a recession in the subsequent quarter. The data used is gathered from the St. Louis Fed Fred II, the National Bureau of Economic Research, and the Energy Information Administration to generate modified variables. These variables are tested using a qualitative dependent variable, recession, in a binary choice model. The findings validated the assumption that oil prices do have a correlation with recessions, and that the relationship is a direct one. Based on the model, an increase in the price of oil will positively affect the likelihood of a "recession" outcome versus the alternative, "no recession". It is anticipated that the results will inspire future research into the causes and effects of oil price surges, as well as the determinants of economic contractions in the future based on policy decisions and economic decision-making practices in the present.
Show less - Date Issued
- 2011
- Identifier
- CFH0004088, ucf:44804
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004088
- Title
- OIL, POLITICS OF THE BUSINESS ENVIRONMENT AND THE PERSIAN GULF.
- Creator
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Parks, Jacob, Sadri, Houman, University of Central Florida
- Abstract / Description
-
This study investigated the effect the price of oil has on enabling political establishments to maintain their presence within the business environment. The study consists of three different case studies with each of the states (Saudi Arabia, Iran and the United Arab Emirates) being chosen based upon their level of state involvement within the business community. Each case study investigated whether the price of oil had any effect on influencing the amount of political involvement within the...
Show moreThis study investigated the effect the price of oil has on enabling political establishments to maintain their presence within the business environment. The study consists of three different case studies with each of the states (Saudi Arabia, Iran and the United Arab Emirates) being chosen based upon their level of state involvement within the business community. Each case study investigated whether the price of oil had any effect on influencing the amount of political involvement within the business community, property rights or trade freedom. The findings for all three case studies suggest that the price of oil has little to no effect on determining the amount of influence the state possesses within the business environment. Based on the results of this investigation, recommendations were made to improve the United States relationship with each country. Additional analysis and recommendations were made concerning the future economic impact of Iraq relying solely on oil as its revenue source.
Show less - Date Issued
- 2008
- Identifier
- CFE0002390, ucf:47758
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002390
- Title
- CUBA'S DEEPWATER DRILLING OPERATIONS: UNITED STATES RELATIONS, LEGALITIES, AND FUTURE.
- Creator
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Walker, Olivia, Naccarato-Fromang, Gina, University of Central Florida
- Abstract / Description
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After the calamitous and environmentally devastating occurrence of the Deepwater Horizon Oil Spill in the Gulf of Mexico in 2010, the sobering realities of the United States' failure to successfully protect its ocean waters have caused several modifications in policy, legislation, and overall direction ofthe entire nation. Although there has been a general shift towards ecological safety and away from the pursuit to drill, oil-drilling explorations have continued to take place in...
Show moreAfter the calamitous and environmentally devastating occurrence of the Deepwater Horizon Oil Spill in the Gulf of Mexico in 2010, the sobering realities of the United States' failure to successfully protect its ocean waters have caused several modifications in policy, legislation, and overall direction ofthe entire nation. Although there has been a general shift towards ecological safety and away from the pursuit to drill, oil-drilling explorations have continued to take place in international waters. This research will focus on the future operations of Repsol YPF, S.A., a Spanish oil company stationed in Cuba, whose drilling ambitions have caused a myriad of problems for the United States. The intent of this paper is to investigate the legalities surrounding Cuba's forthcoming deepwater oil drilling plan within the Florida Straights and how the existing relations between Cuba and the United States will shape the outcome. The majority of United States officials, senators, and policymakers are experiencing a great deal of anxiety and apprehension as Cuba's oil drilling plan continues to solidify. Recent changes in legislation and congressional opinion display the United States' overall objective to shape the manner in which the drilling operations will be carried out. This thesis will ultimately explore what progress the United States has made thus far in the sector of dialogue with Cuban officials, the various options the United States could seek in regards to taking part in the drilling operations that will soon commence in Cuba, and the current risks involved with the entirety of the drilling endeavor.
Show less - Date Issued
- 2012
- Identifier
- CFH0004232, ucf:44956
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004232
- Title
- Managing, Controlling and Improving the Treatment of Produced Water Using the Six Sigma Methodology for the Iraqi Oil Fields.
- Creator
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Al-Shamkhani, Maher T., Elshennawy, Ahmad, Rabelo, Luis, Pazour, Jennifer, Xanthopoulos, Petros, University of Central Florida
- Abstract / Description
-
Produced Water (PW) is the largest volume of waste that is normally generated during oil and gas production. It has large amounts of contaminants that can cause negative environmental and economic impacts. The management method for PW relies highly on types and concentrations of these contaminants, which are field dependent and can vary from one oil field to another. Produced water can be converted to fresh water if these contaminants are removed or reduced to the acceptable drinking water...
Show moreProduced Water (PW) is the largest volume of waste that is normally generated during oil and gas production. It has large amounts of contaminants that can cause negative environmental and economic impacts. The management method for PW relies highly on types and concentrations of these contaminants, which are field dependent and can vary from one oil field to another. Produced water can be converted to fresh water if these contaminants are removed or reduced to the acceptable drinking water quality level. In addition, increasing oil production rate and reducing amounts of discharged harmful contaminants can be achieved by removing dissolved hydrocarbons from PW. In order to identify the types of these contaminants, effective tools and methods should be used. Six Sigma, which uses the DMAIC (Define- Measure- Analyze- Improve- Control) problem-solving approach is one of the most effective tools to identify the root causes of having high percentages of contaminants in produced water. The methodology also helped develop a new policy change for implementing a way by which this treated water may be used. Six Sigma has not been widely implemented in oil and gas industries. This research adopted the Six Sigma methodology through a case study, related to the southern Iraqi oil fields, to investigate different ways by which produced water can be treated. Research results showed that the enormous amount of contaminated PW could be treated by using membrane filtration technology. In addition, a Multi Criteria Decision Making (MCDM) framework is developed and that could be used as an effective tool for decision makers. The developed framework could be used within manufacturing industries, services, educational systems, governmental organizations, and others.
Show less - Date Issued
- 2013
- Identifier
- CFE0004645, ucf:49904
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004645
- Title
- Numerical Study of Interfacial flow using Algebraic Coupled Level Set-Volume of Fluid (A-CLSVOF) Method.
- Creator
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Haghshenas, Majid, Kumar, Ranganathan, Das, Tuhin, Ahmed, Kareem, Shivamoggi, Bhimsen, University of Central Florida
- Abstract / Description
-
Solving interfacial flows numerically has been a challenge due to the lack of sharpness and the presence of spurious currents at the interface. Two methods, Algebraic Coupled Level Set-Volume of Fluid (A-CLSVOF) method and Ghost Fluid Method (GFM) have been developed in the finite volume framework and employed in several interfacial flows such as Rayleigh-Taylor instability, rising bubble, impinging droplet and cross-flow oil plume. In the static droplet simulation, A-CLSVOF substantially...
Show moreSolving interfacial flows numerically has been a challenge due to the lack of sharpness and the presence of spurious currents at the interface. Two methods, Algebraic Coupled Level Set-Volume of Fluid (A-CLSVOF) method and Ghost Fluid Method (GFM) have been developed in the finite volume framework and employed in several interfacial flows such as Rayleigh-Taylor instability, rising bubble, impinging droplet and cross-flow oil plume. In the static droplet simulation, A-CLSVOF substantially reduces the spurious currents. The capillary wave relaxation shows that this method delivers results comparable to those of more rigorous methods such as Front Tracking methods for fine grids. The results for the other interfacial flows also compared well with the experimental results. Next, interfacial forces are implemented by enlisting the finite volume discretization of Ghost Fluid Method. To assess the A-CLSVOF/GFM performance, four cases are studied. In the case of the static droplet in suspension, the combined A-CLSVOF/GFM produces a sharp and accurate pressure jump compared to the traditional CSF (continuum surface force) implementation. For the linear two-layer shear flow, GFM sharp treatment of the viscosity captured the velocity gradient across the interface. For a gaseous bubble rising in a viscous fluid, GFM outperforms CSF by almost 10%. Also, a Decoupled Pressure A-CLSVOF/GFM method (DPM) has been developed which separates pressure into two pressure components, one accounting for interfacial forces such as surface tension and another representing the rest of flow pressure. It is proven that the DPM implementation results in more efficiency in PISO (Pressure Implicit with Splitting of Operators) loop. A two-phase solver is used to study buoyant oil discharge in quiescent and cross-flow ambient. Different modes of breakup including dripping, jetting (axisymmetric and asymmetric) and atomization for cross-flow oil jet are captured.
Show less - Date Issued
- 2018
- Identifier
- CFE0007570, ucf:52582
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0007570
- Title
- Magnesium and Acidified Ethanol Based Treatment Systems for the Extraction and Dechlorination of Polychlorinated Biphenyls from Contaminated Oils, Paints, and Soils.
- Creator
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Novaes-Card, Simone, Yestrebsky, Cherie, Clausen, Christian, Elsheimer, Seth, Frazer, Andrew, Duranceau, Steven, University of Central Florida
- Abstract / Description
-
Polychlorinated biphenyls (PCBs) are a class of environmentally persistent halogenated organic compounds that were once used as stabilizers to improve the properties of a variety of materials such as lubricants, heat transfer fluids, paints, and caulking materials. PCBs are also capable of migration through processes such as spillage into soils, leaching into groundwater, and volatilization into the atmosphere. Although banned in 1979 over health concerns, PCBs persist in these materials to...
Show morePolychlorinated biphenyls (PCBs) are a class of environmentally persistent halogenated organic compounds that were once used as stabilizers to improve the properties of a variety of materials such as lubricants, heat transfer fluids, paints, and caulking materials. PCBs are also capable of migration through processes such as spillage into soils, leaching into groundwater, and volatilization into the atmosphere. Although banned in 1979 over health concerns, PCBs persist in these materials to this day because they are resistant to biotic degradation and natural weathering processes. The wide variety of contaminated materials means that many existing treatment options cannot be used across all media. This research focuses on the adaptation of a reductive dehalogenation system for dechlorination of PCBs from machine oils, paints, sludges, and soils. The system utilizes magnesium, glacial acetic acid, and ethanol in order to remove the chlorine atoms from the biphenyl backbone, which is less toxic and can be broken down biotically.A treatment plan was devised for machine oil contaminated with PCBs, involving sorption of PCBs onto a column of super activated alumina followed by desorption into hexane and treatment of the hexane with magnesium and acidified ethanol to dechlorinate the PCBs. In a small-scale study, 98.5% of PCBs from an oil sample were sorbed to the column, and the PCBs that were subsequently desorbed were dechlorinated to below detectable levels within one day of magnesium and acidified ethanol treatment. Information from small-scale studies was used to design larger sorption columns intended for use at a field site.A field study was conducted to compare the effectiveness of two different treatment system pastes at removing PCBs from painted surfaces. These pastes were formulated with bulking and viscosity control agents in order to cling to vertical surfaces, and contained either acidified ethanol and magnesium (Activated Metal Treatment System, AMTS) or acidified ethanol only (Non-Metal Treatment System, NMTS). AMTS was capable of 64.8% average removal of PCBs from paint, while NMTS demonstrated 89.5% average removal but required a second step to dechlorinate the extracted PCBs. This system allows for treatment of surfaces without demolishing the structure. AMTS was also studied for in situ dechlorination of PCBs in soils, and NMTS enclosed in a polyethylene barrier was studied for extraction of PCBs from sludges.A two-step system was devised for the ex situ treatment of PCB-contaminated soils. Solvent extraction with ethanol or an ethanol/ethyl lactate cosolvent is followed by dechlorination using magnesium and glacial acetic acid. Studies included the optimization of extraction solvent, cosolvent ratio, cost, and reuse of magnesium or extraction solvent. Surface analysis of magnesium particles used in dechlorination showed a precipitate occluding part of the surface, which was thought to be a combination of magnesium ethoxide and magnesium hydroxide. This precipitate is thought to come from the reaction of magnesium ethoxide formed during the PCB dechlorination process with pore water extracted from the soil.
Show less - Date Issued
- 2013
- Identifier
- CFE0005222, ucf:50630
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005222
- Title
- Cross-Continental Insights into Jaguar (Panthera onca) Ecology and Conservation.
- Creator
-
Figel, Joseph, Noss, Reed, Quintana-Ascencio, Pedro, Jenkins, David, Quigley, Howard, University of Central Florida
- Abstract / Description
-
The jaguar (Panthera onca) is a widely distributed large carnivore and the focal species of a range-wide connectivity initiative known as the jaguar conservation network (JCN). Comprised of ~83 Jaguar Conservation Units (JCUs) and ~75 corridors from northern Mexico to Argentina, the JCN functions as a conduit for jaguar movement and gene flow. Key linkages in the network are imperiled by human population growth, large-scale agriculture, highway expansion, and other infrastructural development...
Show moreThe jaguar (Panthera onca) is a widely distributed large carnivore and the focal species of a range-wide connectivity initiative known as the jaguar conservation network (JCN). Comprised of ~83 Jaguar Conservation Units (JCUs) and ~75 corridors from northern Mexico to Argentina, the JCN functions as a conduit for jaguar movement and gene flow. Key linkages in the network are imperiled by human population growth, large-scale agriculture, highway expansion, and other infrastructural development. Labeled (")corridors of concern,(") these vulnerable linkages are imperative to the maintenance of connectivity and genetic diversity throughout jaguar distribution. I take a multi-faceted approach to analyze conservation issues and identify potential solutions in three of the most vulnerable connections of the JCN. I estimate densities and assess local residents' perceptions of jaguars in a fragmented JCU in western Mexico, analyze 3 years of data from 275 camera-trap sites to evaluate jaguar habitat use in a corridor of concern in Colombia, and quantify the umbrella value of jaguars for endemic herpetofauna in Nuclear Central America, a ~ 370,000 km(&)#178; sub-region of the Mesoamerican biodiversity hotspot. My research produces the first jaguar density estimate in a JCU containing human population densities (>)50 people/km2 and provides the strongest support for jaguar association with wetlands collected to date. In Nuclear Central America, one of the most important yet vulnerable areas of the JCN, I demonstrate the umbrella value of this wide-ranging felid. I conclude with a discussion on the need to reevaluate extirpation thresholds of jaguars in human-use landscapes, to direct more research on wetlands as keystone habitats for jaguars, and to further assess the utility of umbrella analyses using jaguars as focal species to support holistic conservation planning.
Show less - Date Issued
- 2017
- Identifier
- CFE0006591, ucf:51258
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006591
- Title
- Three-phase contact line phenomena in droplets on solid and liquid surfaces: electrocapillary, pinning, wetting line velocity effect, and free liquid surface deformation.
- Creator
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Shabani, Roxana, Cho, Hyoung, Kumar, Ranganathan, Kapat, Jayanta, Chow, Louis, Zhai, Lei, University of Central Florida
- Abstract / Description
-
In this dissertation, physical phenomena relevant to (i) an interface formed between two fluids and a solid phase (wettingline) and (ii) an interface between three fluids (triple contact line) were investigated. In the former case, the wetting line (WL)phenomena, which encompass the wetting line energy (WLE), the wetting line velocity (WLV), and the contact anglehysteresis, were studied using a micropump based on electrowetting on dielectric (EWOD). In the latter case, the air filmlubrication...
Show moreIn this dissertation, physical phenomena relevant to (i) an interface formed between two fluids and a solid phase (wettingline) and (ii) an interface between three fluids (triple contact line) were investigated. In the former case, the wetting line (WL)phenomena, which encompass the wetting line energy (WLE), the wetting line velocity (WLV), and the contact anglehysteresis, were studied using a micropump based on electrowetting on dielectric (EWOD). In the latter case, the air filmlubrication effect and the liquid free surface deformation were taken into account to explain the dual equilibrium states ofwater droplets on liquid free surfaces. A micropump based on droplet/meniscus pressure gradient generated by EWOD was designed and fabricated. By alteringthe contact angle between liquid and solid using an electric field a pressure gradient was induced and a small droplet waspumped into the channel. The flow rate in the channel was found to be constant in spite of the changes in the droplet'sradius. The WL phenomena were studied to unravel the physical concept behind the micropump constant flow rate. Theobservation and measurement reveal that the shrinking input droplet changes its shape in two modes in time sequence: (i)its contact angle decreases, while its wetting area remains constant, and (ii) its WL starts to move while its contact anglechanges. Contact angles were measured for the advancing and receding WLs at different velocities to capture a full pictureof contact angle behavior. The effects of the WLE on the static contact angle and the WLV on the dynamic contact angle inthe pump operation were investigated. Also the effect of EWOD voltage on the magnitude and uniformity of the micropumpflow rate was studied. Dynamic contact angles were used to accurately calculate the pressure gradient between the dropletand the meniscus, and estimate the flow rate. It was shown that neglecting either of these effects not only results in aconsiderable gap between the predicted and the measured flow rates but also in an unphysical instability in the flow rateanalysis. However, when the WLE and WLV effects were fully taken into account, an excellent agreement between thepredicted and the experimental flow rates was obtained.For the study of the TCL between three fluids, aqueous droplets were formed at oil-air interface and two stableconfigurations of (i) non-coalescent droplet and (ii) cap/bead droplet were observed. General solutions for energy and forceanalysis were obtained and were shown to be in good agreement with the experimental observations. Further the energybarrier obtained for transition from configuration (i) to (ii) was correlated to the droplet release height and the probability ofnon-coalescent droplet formation. Droplets formed on the solid surfaces and on the free surface of immiscible liquids have various applications indroplet-based microfluidic devices. This research provides an insight into their formation and manipulation.
Show less - Date Issued
- 2013
- Identifier
- CFE0005253, ucf:50598
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005253