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2013

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Professional Learning Communities And Poverty, Paul Ervin Lawrence Dec 2013

Professional Learning Communities And Poverty, Paul Ervin Lawrence

Theses and Dissertations

When a school experiences a sudden change in demographics the impact can be difficult to comprehend. Effective professional development is essential in order for teachers to comprehend the changes and facilitate school improvement. This research explores the perceptions, attitudes, and behaviors of middle class teachers in a town which experienced a dramatic shift in the demographics of students; many middle class students left the school and many students who qualified for free and reduced lunch moved in. The teachers who experienced this demographic shift struggled to understand the changes developing in their school. In order to develop knowledge of the …

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Scattering-Based Solar Concentrator, Jing Wen Dec 2013

Scattering-Based Solar Concentrator, Jing Wen

Theses and Dissertations

This work shows a laboratory based demonstration that elastic scattering from a layer of wavelength-sized particles can be used to concentrate sunlight for use in photovoltaic power production. The concentrator design consists of a layer of particles dispersed across a mirrored glass plate. Photovoltaic cells line the edges of the plate, which receive light that is coupled into the plate via scattering by the particles and confined thereafter by total internal reflection. All materials used to construct the concentrator are low-cost off-the-shelf items typically available at hardware stores. The net power produced is compared to a single, bare cell that …

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Perceptions Of Students At A Rural Mississippi Community College Regarding Employability, Cortney R. Harris Dec 2013

Perceptions Of Students At A Rural Mississippi Community College Regarding Employability, Cortney R. Harris

Theses and Dissertations

Research studies show that there is a skills gap in American society today. This research study examined employability perceptions of community college students at a rural community college in Mississippi. Students were asked to complete an online survey that questioned the degree of importance placed on several employability skills, as well as their self-perceived competence levels at performing those skills. Likert-scale response set type questions were used to provide responses on importance and competence levels. After sending the survey invitation, 100 usable surveys were returned and analyzed for this research study. The data were analyzed using descriptive statistics, Mann-Whitney procedures, …

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Efficacy Of A Novel Through-Thickness Perfusion Bioreactor To Create Scaffold-Free Tissue Engineered Cartilage, Eric Andrew Gilbert Dec 2013

Efficacy Of A Novel Through-Thickness Perfusion Bioreactor To Create Scaffold-Free Tissue Engineered Cartilage, Eric Andrew Gilbert

Theses and Dissertations

Articular cartilage is an avascular, aneural tissue that covers the ends of diarthroidal joints. Once damaged by disease or injury, cartilage lacks the ability to self-repair. Generating tissue engineered cartilage is an exciting field that may provide a possible solution to this problem. The purpose of this study is to determine the efficacy of a through-thickness perfusion bioreactor to generate scaffoldree tissue engineered cartilage. The results of the study show that allowing long-term static culture to cell constructs before perfusion increases the efficacy of the bioreactor. Immediate perfusion of cell constructs in the bioreactor is shown to decrease the efficacy …

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Establishing The Reliability And Validity Of The Stalking Myth Scale - Revised, Amanda Lee Howell Dec 2013

Establishing The Reliability And Validity Of The Stalking Myth Scale - Revised, Amanda Lee Howell

Theses and Dissertations

Misconceptions about intimate aggression have been found to have serious consequences (Kamphius et al., 2005; Robinson, 2005). These beliefs serve to minimize the crime and blame the victim which can cause individuals to not take the crime seriously (Kamphius, et al., 2005; Sinclair, in press). Initial work combined and updated Sinclair's (2010) Stalking Myths Scale and McKeon's unpublished Stalking Attitudes Questionnaire, but further psychometric analysis is needed (Lyndon, Sinclair, & Martin, 2011). I surveyed 1,200 undergraduates using the Stalking Myth Scale –Revised (SMS – R), a modified version of the Obsessive Relational Intrusion Inventory – Short Form (ORI - SF; …

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Urban Flow-Through Facilities' Media Compositions For Stormwater Quality And Quantity Improvements, Emily Gwynne Overbey Dec 2013

Urban Flow-Through Facilities' Media Compositions For Stormwater Quality And Quantity Improvements, Emily Gwynne Overbey

Theses and Dissertations

Urban stormwater management is evolving toward sustainable approaches which rely on dispersed small-scale bioretention BMPs. One such BMP is the flow-through planter, commonly applied in areas where infiltration into in situ soil is restricted or not possible. A project was developed to evaluate 18, vertically scaled flow-through mesocosms. Three replicates of six treatments, including four soil mixtures containing varied percentages of sand, compost and topsoil, were tested for orthophosphate and nitrate removal, volume reduction capabilities, and peak flow attenuation through the application of a synthetic solution over a simulated 2-inch, Type II storm event. Runoff volume was significantly (p < 0.05) reduced compared to controls. Nutrient levels observed along the hydrograph at different time-steps and flow rates revealed patterns not apparent in cumulative results. The observation of preferential flow patterns along with variability in nutrient removal across treatments highlights the need for design modifications of flow-through facilities.

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Investigation Of Parent Source Material In Smith County, Mississippi, Kayla Jean Calhoun Dec 2013

Investigation Of Parent Source Material In Smith County, Mississippi, Kayla Jean Calhoun

Theses and Dissertations

Calcium bentonite deposits of the Glendon and Bucatunna formations of the Oligocene Vicksburg Group located in Smith County, Mississippi were examined to determine the depositional environment, diagenetic history and origin of the bentonite. Traditionally, calcium bentonite was considered to be the product of the weathering of volcanic ash deposits. The hypothesis tested is that the bentonite deposits are not a result of weathered volcanic ash, but are a result of weathered marl. Core samples were drilled from the Chisholm bentonite mine in Smith County and were studied using X-ray diffraction, scanning electron microscopy, and petrographic microscopy. Abundant bacteria along with …

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Monitoring Gulf Coast Fish Quality, Karl Edward Bell Dec 2013

Monitoring Gulf Coast Fish Quality, Karl Edward Bell

Theses and Dissertations

Globalization and the rise of fish importation has led to an increase in mislabeling. To combat this problem, analytical and molecular methods have been employed. First, nitrofuran metabolites were extracted, hydrolyzed, and derivatized in channel catfish, swai, and tilapia. Utilizing high performance liquid chromatography coupled with triple quadrupole mass spectrometry, derivatized metabolites were detected at levels of 1 ng/mL with coefficients of determination greater than 0.998. Recoveries greater than 90% and relative standard deviation less than 17% indicate that the method is successful. Secondly, chip based electrophoresis coupled with restriction fragment length polymorphism was used for the species differentiation. By …

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Formation Of Oxidative-Stress Resistant Phenotypes Of Listeria Monocytogenes Serotypes 1/2a And 4b And Their Stability At 37oc And 4oc, Piumi De Abrew Abeysundara Dec 2013

Formation Of Oxidative-Stress Resistant Phenotypes Of Listeria Monocytogenes Serotypes 1/2a And 4b And Their Stability At 37oc And 4oc, Piumi De Abrew Abeysundara

Theses and Dissertations

The purpose of this study was to induce an oxidative-stress adaptation in Listeria monocytogenes Bug600 (serotype 1/2a) and F1057 (serotype 4b) by pre-exposing to sublethal H2O2 and alkali-stress either singly or sequentially. Our findings show that the sequential pre-exposure of cells to pH 9 for 30 min treatment followed by 50 ppm H2O2 for 30 min at 37°C yielded the highest oxidative-stress resistant phenotypes of L. monocytogenes Bug600 and F1057. The sublethal H2O2 and sublethal alkali-stress induced oxidative-stress adaptations were completely reversible within 60 min at 37°C in the absence of such sublethal stress. However, the oxidative-stress adaptation induced at …

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Examining The Influence Of Nutritional Behaviors, Knowledge And Attitudes On Body Mass Index Of Adults In North Mississippi, Gloria Therese Broughan Dec 2013

Examining The Influence Of Nutritional Behaviors, Knowledge And Attitudes On Body Mass Index Of Adults In North Mississippi, Gloria Therese Broughan

Theses and Dissertations

Individuals with weight statuses approaching obesity may be at risk for chronic health problems. Diet, weight, health behaviors, level of knowledge, and attitudes or perceptions have been identified as key factors influencing body weight. The purpose of this study was to determine which factors were related to BMI in adults in north Mississippi and to determine if there were relationships between those factors. A telephone survey was conducted with 500 participants (mean age 46.3 ± 18.5). The average BMI was 27.5 ± 6.2 kg/m2. Knowledge and attitude/perception-based data were associated with a higher BMI in the population more than dietary …

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How Creative Professional Service Firms Internationalize: A Business Model Portfolio Approach, Deirdre Mcquillan, Pamela Sharkey Scott, Vincent Mangematin Dec 2013

How Creative Professional Service Firms Internationalize: A Business Model Portfolio Approach, Deirdre Mcquillan, Pamela Sharkey Scott, Vincent Mangematin

Conference Papers

Traditional theory of firm internationalization assumes all firms are homogeneous in their approach to managing uncertainties and implementing business strategies when internationalizing. A business model portfolio approach articulates a more complex process and suggests that firms adopt a portfolio of business models to balance uncertainties. Combining these two perspectives, this multiple case study research design explores how creative professional service firms (creative PSFs) internationalize. Creative PSFs such as architects are embedded in their local cultures, operating at the intersection of business and art. Our study reveals the complexities of creative PSF internationalization, showing that in contrast to existing explanations, multiple …

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Understanding Binding-Induced Conformational Change In The Pin1 Prolyl Isomerase, Hawa Gyamfi Dec 2013

Understanding Binding-Induced Conformational Change In The Pin1 Prolyl Isomerase, Hawa Gyamfi

Theses and Dissertations

Pin1 is a Prolyl Isomerase that catalyzes cis-trans isomerization of peptides with pSer/Thr-Pro motifs in many cell signaling proteins. This conformational switch is implicated in diseases. Pin1 activity is considered a target for therapeutic applications. Pin1 targets motifs by its N-terminal WW-binding domain. A C-terminal PPIase domain is responsible for catalysis. To understand how Pin1 coordinates its enzymatic activities, it is necessary to probe how the domains behave in the presence of substrates. Here, we used novel (Histone H1 and Sic1) and other existing peptides to characterize the dynamics of Pin1 and impact of substrate binding on inter-domain interactions. Pin1- …

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Bioluminescence Imaging Of Transgene Expression In Intact Porcine Ovarian Follicles In Vitro, Song-Yi Jung Dec 2013

Bioluminescence Imaging Of Transgene Expression In Intact Porcine Ovarian Follicles In Vitro, Song-Yi Jung

Theses and Dissertations

The porcine antral follicle, which consists of an oocyte and surrounding follicular components, including theca, granulosa, and cumulus cells and follicular fluid, is an essential microenvironment for oocyte development and maturation. Investigating cellular and molecular events in the context of the whole follicle will aid in our understanding of interactions between the oocyte and the follicular components. The objective of this dissertation was to develop a novel bioluminescent imaging model to visualize and measure cellular and molecular events in living intact ovarian follicles in vitro. Bioluminescence imaging was employed to facilitate noninvasive, dynamic, and real-time transgene analysis in living intact …

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Characterization Of A Test Stand For Evaluating Performance And Qualifying Metal Media Filters Under Asme Ag-1, John Andrew Wilson Dec 2013

Characterization Of A Test Stand For Evaluating Performance And Qualifying Metal Media Filters Under Asme Ag-1, John Andrew Wilson

Theses and Dissertations

The Institute of Clean Energy Technology (ICET) at Mississippi State University was awarded a contract by the DOE to design, fabricate, assemble, and characterize a research grade test stand to assist in the development of ASME AG-1 Section FI Metal Media Filters. The major barriers to completing the code section is development of a test stand for collecting data necessary to specify performance requirements for use and for filter qualification. Currently there is not a test stand capable of performing this testing. Performance criteria for the FI test stand were developed by the Section FI project team and ICET. These …

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Determination Of Beta-Carotene Content And Consumer Acceptability Of Sweet Potato Cookies By Adults And Preschool Children, Aja Marie Stokes Dec 2013

Determination Of Beta-Carotene Content And Consumer Acceptability Of Sweet Potato Cookies By Adults And Preschool Children, Aja Marie Stokes

Theses and Dissertations

Vitamin A deficiency is recognized as a major health concern worldwide, especially in developing countries. Sweet potatoes are a cash crop that is abundantly grown and available, providing an excellent source of the carotenoid, beta-carotene. Carotenoids are precursors to vitamin A (retinol). Three sweet potato cookie products were developed: glutenree, wheat-containing, and glutenree with extra sweet potato. Products were evaluated by adults and pre-school aged children based on appearance, aroma, texture, flavor, and overall acceptability. Results showed that overall the children liked both the glutenree and wheat-containing cookies (p<0.05). Adults preferred (p<0.05) the glutenree with extra sweet potato and the wheat-containing products. The glutenree cookie contained 10.1 parts per million of beta-carotene as determined by high-performance liquid chromatography.

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The Effect Of National Board Certified Teachers On Mathematics Achievement For Students In A Title I School, Watress Lashun Harris Dec 2013

The Effect Of National Board Certified Teachers On Mathematics Achievement For Students In A Title I School, Watress Lashun Harris

Theses and Dissertations

The purpose of the study was to determine if there is a difference in mathematics mean scale score growth on the MCT2 mathematics assessment between students taught by national board certified teachers (NBCTs) and those taught by non-NBCTs in a low socioeconomic, high minority, Title I school. For this study, a causal-comparative research design and a statistical analysis procedure of ANCOVA were used to answer two research questions: First, is there a statistically significant difference in mathematics mean scale score growth on the MCT2 mathematics assessment between fourth grade African American and Caucasian students taught by NBCTs and those taught …

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Evaluation Of Catalytic And Non-Catalytic Production Of Biodiesel From Wet Microbial Media And Reaction Schemes, Adebola Titilope Coker Dec 2013

Evaluation Of Catalytic And Non-Catalytic Production Of Biodiesel From Wet Microbial Media And Reaction Schemes, Adebola Titilope Coker

Theses and Dissertations

Biodiesel is a renewable fuel that can supplement petroleum fuel supply. A major deterrent to commercial biodiesel production from traditional feedstock like soybean, canola or rapeseed oils is the high cost of feedstock: 70 - 95% of total biodiesel production cost. Therefore, a relatively cheaper feedstock is needed to make the price of biodiesel cost-competitive with petroleum diesel. Activated sludge from wastewater treatment plants is a relatively cheaper feedstock and relatively easy to obtain. However, drying of this sludge prior to oil extraction is a major operating cost of this process, as high as 50% of biodiesel production cost. The …

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A Comparison Of Participant Gains In Attitude And Behavior After Experiencing A Food Safety Curriculum In Traditional And Computer Delivered Environments, Jennifer Knowles Schilling Dec 2013

A Comparison Of Participant Gains In Attitude And Behavior After Experiencing A Food Safety Curriculum In Traditional And Computer Delivered Environments, Jennifer Knowles Schilling

Theses and Dissertations

Child care providers in Mississippi are required by the Mississippi Health Department to obtain food manager’s training and certification. The TummySafe© program satisfies this requirement and is offered in a self-paced computer delivered version and a traditional classroom version. This research explores participant changes in attitude and self-reported behaviors in the two methods of curriculum delivery as well as the correlation of knowledge change with attitude and self-reported behavior change. A quasi-experimental, pre-test/post-test design was used. Attitude change was not significantly different in the two methods. Traditional participants reported a higher change in self-reported behaviors than computer delivered participants. Both …

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B Ring Substituted Flavonols: Hydrogen Bonding, Ru(Ii) Complexes And Al(Iii) Chelation, Prangige Kumudu V Peiris Dec 2013

B Ring Substituted Flavonols: Hydrogen Bonding, Ru(Ii) Complexes And Al(Iii) Chelation, Prangige Kumudu V Peiris

Theses and Dissertations

Flavonols are hydroxyl-substituted flavonoids and naturally occur as secondary metabolites in plants. Several studies have discovered extensive medicinal properties of flavonols. The present work reports on structural and functional investigation of the B ring substituted flavonols based on spectroscopic and electrochemical techniques. The purpose of this study is to determine the influence of the B ring substitutions on the hydrogen bonding interactions, the electronic effects in ruthenium complexes and the Al3+ chelation of B ring substituted flavonols. The electronic effects of the B rings were changed by introducing methyl, methoxy and nitro groups at position 4ʹ on the B ring. …

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Black-White, Black-Nonblack, And White-Nonwhite Residential Segregation In U.S. Metropolitan And Nonmetropolitan Areas, 1990-2010, Jed Raney Pressgrove Dec 2013

Black-White, Black-Nonblack, And White-Nonwhite Residential Segregation In U.S. Metropolitan And Nonmetropolitan Areas, 1990-2010, Jed Raney Pressgrove

Theses and Dissertations

The goal of this study is to examine racial residential segregation in U.S. metropolitan and nonmetropolitan areas. The study uses 1990-2010 decennial census data to answer a broad theoretical question: is the historical black-white color line being replaced by a black-nonblack or white-nonwhite color line? The results show that blackwhite segregation is higher than black-nonblack and white-nonwhite segregation in metropolitan areas, nonmetropolitan areas, and the United States as a whole. A multivariate analysis reveals that population size tends to be associated with higher segregation in metropolitan areas and lower segregation in nonmetropolitan areas. As a control variable, diversity seems to …

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Creation Of An Internal State Variable Plasticity-Damage-Corrosion Model Validated By Experiments With Magnesium Alloys, Christopher Avery Walton Dec 2013

Creation Of An Internal State Variable Plasticity-Damage-Corrosion Model Validated By Experiments With Magnesium Alloys, Christopher Avery Walton

Theses and Dissertations

In this study, a new consistent formulation coupling kinematics, thermodynamics, and kinetics with damage using an extended multiplicative decomposition of the deformation gradient that accounts for corrosion effects is presented. The technical approach used for modeling the corrosion behavior of magnesium alloys was divided into three primary steps. First, a predictive corrosion model was developed based on experimental corrosion observations. The experimentally-observed corrosion mechanisms of pitting, intergranular, and general corrosion on the AZ31 magnesium alloy were quantified in 3.5 wt.% NaCl immersion and salt spray environments using optical microscopy and laser profilometry to document the changes in the pit characteristics. …

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Cyberthreats, Attacks And Intrusion Detection In Supervisory Control And Data Acquisition Networks, Wei Gao Dec 2013

Cyberthreats, Attacks And Intrusion Detection In Supervisory Control And Data Acquisition Networks, Wei Gao

Theses and Dissertations

Supervisory Control and Data Acquisition (SCADA) systems are computer-based process control systems that interconnect and monitor remote physical processes. There have been many real world documented incidents and cyber-attacks affecting SCADA systems, which clearly illustrate critical infrastructure vulnerabilities. These reported incidents demonstrate that cyber-attacks against SCADA systems might produce a variety of financial damage and harmful events to humans and their environment. This dissertation documents four contributions towards increased security for SCADA systems. First, a set of cyber-attacks was developed. Second, each attack was executed against two fully functional SCADA systems in a laboratory environment; a gas pipeline and a …

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"Through Hazel Eyes" : Hazel Brannon Smith's Fight For Free Speech And Justice In Mississippi 1936-1985, Jeffery Brian Howell Dec 2013

"Through Hazel Eyes" : Hazel Brannon Smith's Fight For Free Speech And Justice In Mississippi 1936-1985, Jeffery Brian Howell

Theses and Dissertations

Hazel Brannon Smith, a prominent white newspaper owner in Mississippi before, during, and after the civil rights era was an avowed supporter of Jim Crow segregation for the first half of her career, until pressure from the white establishment and the changing political and social milieu of the 1950s and 1960s pushed her to become an ally of the black struggle for social justice. Smith's biography reveals how many historians have miscast white liberals of this period. Smith was considered a liberal by her peers, but her actions reveal the firm limits of white liberalism in the rural South during …

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Enhancing Our Understanding Of Age-0 Crappies In Northwest Mississippi Flood Control Reservoirs: A Study On Distribution And Size, Levi Joseph Kaczka Dec 2013

Enhancing Our Understanding Of Age-0 Crappies In Northwest Mississippi Flood Control Reservoirs: A Study On Distribution And Size, Levi Joseph Kaczka

Theses and Dissertations

Crappie fisheries in northwest Mississippi flood control reservoirs are valued from social and economic standpoints. To mitigate variable recruitment rates of these recreationally valuable species, I sought to gain a better understanding of the population dynamics of these fish during their first year of life. My analyses indicate that embayment habitats in the study reservoirs display a longitudinal distribution gradient of both habitat composition and age-0 crappie abundance during late summer. Additionally, age-0 crappies inhabiting uplake floodplain areas grow to a larger size than downlake embayment-inhabiting conspecifics. The results from this study provide direction on potential management strategies to promote …

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Development Of Mathematical Model For Abiotic Stresses And Cotton Fiber Quality, Suresh Bajirao Lokhande Dec 2013

Development Of Mathematical Model For Abiotic Stresses And Cotton Fiber Quality, Suresh Bajirao Lokhande

Theses and Dissertations

Abiotic stresses cause extensive losses to agriculture production worldwide. Cotton (Gossypium hirsutum L.) is an important fiber crop grown widely in subtropical region where temperature, water and nutrients are the common factors limiting crop production. Such losses could be more severe in the future climate as intensity and frequency of those stresses are projected to increase. The overall goal of this study was to evaluate effects of abiotic stresses on cotton reproductive performance and develop functional algorithms for fiber properties in response to different stress factors. Three experiments were conducted to evaluate the effects of temperature, water, and nitrogen in …

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Differentiating The Characteristic Response Of The Brain After Exposure To Blunt And Blast Trauma, Mark Gregory Tejada Begonia Dec 2013

Differentiating The Characteristic Response Of The Brain After Exposure To Blunt And Blast Trauma, Mark Gregory Tejada Begonia

Theses and Dissertations

Military personnel often experience mild traumatic brain injury (mTBI) from exposure to improvised explosive devices (IEDs). Soldiers typically endure blast trauma from the IED pressure wave as well as blunt trauma from ensuing head impacts. Researchers have not reached a consensus on whether the biomechanical response from blunt or blast trauma plays a more dominant role in mTBI because the specific biomechanical sources of injury are often undetermined. Consequently, the goal of this dissertation was to conduct three separate studies in order to characterize the mechanical behavior of the brain after exposure to mTBI conditions. For Study 1, mild blunt …

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Development Of Biomass-Based Cellulose Nanowhiskers And Its Application As Catalyst Support In Converting Syngas To Biofuels, Xiaodan Shi Dec 2013

Development Of Biomass-Based Cellulose Nanowhiskers And Its Application As Catalyst Support In Converting Syngas To Biofuels, Xiaodan Shi

Theses and Dissertations

The objectives of this research were to develop the best methods for cellulose nanowhiskers (CNWs) preparation from raw biomass materials and the feasibility to perform CNWs as Fe3+ catalyst support in converting syngas to biofuels. Raw kenaf bast and switchgrass were initially pretreated with dilute NaOH followed by dilute H2SO4. High yields of alpha-cellulose were obtained. Hemicellulose, ash, and most lignin were removed during pretreatment. Preparation of CNWs after pretreatment was then conducted via H2SO4 hydrolysis. The most efficient hydrolysis condition was determined as H2SO4 concentration through orthogonal experiments. In contrast with pure cellulose fibers, CNWs supported Fe3+ catalyst applied …

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Dispersal And Management Of Invasive Aquatic Plants In Mississippi Waterways, Amanda Louise Fernandez Dec 2013

Dispersal And Management Of Invasive Aquatic Plants In Mississippi Waterways, Amanda Louise Fernandez

Theses and Dissertations

To understand the flow of water as a factor that influences aquatic vegetation communities and aquatic plant dispersal, custom-made Global Positioning System (GPS) drones were used to monitor the movement of water in Aliceville Lake, Columbus Lake, and Ross Barnett Reservoir, MS. In each reservoir, the drones drifted in the wind-generated surface current. Analysis of wind speeds suggests that a certain wind speed may be necessary to overcome gradient flow. Wind direction and wind speed should be incorporated in future spatial simulation models for aquatic plant dispersal and distribution. An herbicide evaluation on Cuban bulrush (Oxycaryum cubenese) was conducted to …

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Identification Of Triaxial Strongly Deformed Bands And Spectroscopy Of High-Spin Normal Deformed Structures In 164hf, Jarrod Christopher Marsh Dec 2013

Identification Of Triaxial Strongly Deformed Bands And Spectroscopy Of High-Spin Normal Deformed Structures In 164hf, Jarrod Christopher Marsh

Theses and Dissertations

This research encompasses threemajor segments: a search for high-spin triaxial strongly deformed (TSD) bands in 164Hf, spectroscopy of high-spin normal deformed (ND) bands in 164Hf, and a low-spin search in 165Ta. In April 2010, an experiment was carried out using the ATLAS linear accelerator at Argonne National Laboratory (Argonne, IL). A thin (761 microgram/square centimeter) 94Zr target was impacted with a 330MeV 74Ge beam. This produced a 168Hf compound nucleus that decayed via the 4n channel to 164Hf. Offline data analysis was performed using coincidence relationships and gamma-ray intensity analysis to determine the decay pathways and Directional Correlation of Oriented …

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Investigation Of The Structure-Activity Relationship Of Pseudo-Single-Crystal Platinum Electrodes By Scanning Electrochemical Microscopy, Yulin Wang Dec 2013

Investigation Of The Structure-Activity Relationship Of Pseudo-Single-Crystal Platinum Electrodes By Scanning Electrochemical Microscopy, Yulin Wang

Theses and Dissertations

The study of the structure-activity relationship of electrode surfaces is fundamentally important in electrocatalysis research. Yet, the methods and techniques used for the examination of structure-activity relationship so far are limited by their capabilities, and the exploration of electrochemistry at complex surfaces is very challenging. In this study, the correlation between the electrode surface structure and its corresponding activity in two electrochemical reactions were investigated: an electrochemical etching reaction and an electrocatalysis reaction. A polycrystalline Pt electrode was galvanically etched to expose the underlying well-defined crystallites serving as pseudo-single-crystal electrodes. Atomic force microscopy (AFM) complemented with electron backscatter diffraction (EBSD) …

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