Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

2013

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 421 - 450 of 24645

Full-Text Articles in Entire DC Network

The Effect Of The Flipped Classroom Model On Achievement In An Introductory College Physics Course, Joshua Brian Winter Dec 2013

The Effect Of The Flipped Classroom Model On Achievement In An Introductory College Physics Course, Joshua Brian Winter

Theses and Dissertations

The flipped or inverted classroom model is one in which the time and place for traditional lecture and homework are reversed. Traditional lecture is replaced by online videos assigned as homework. This frees up time in class to be spent with more student centered activities such as discussion based concept questions and group problem solving. While growing in popularity, research on the effectiveness of this format is sparse. In this quasi-experimental study, two sections of an introductory algebra-based college physics course were examined over a five week period. Each section was taught with either the traditional or flipped model and …

Go to article

Population-Level Genetic Structure Of Acmispon Argophyllus On The Channel Islands Of California, Gregory Lawrence Wheeler Dec 2013

Population-Level Genetic Structure Of Acmispon Argophyllus On The Channel Islands Of California, Gregory Lawrence Wheeler

Theses and Dissertations

The California Channel Islands present an ideal system in which to study unique biogeographical patterns seen in island systems near a mainland source, where spatial barriers are likely to limit gene flow without disrupting it completely. The islands also harbor a number of endemic taxa, suggesting that isolation from the mainland may be strong for some taxa. For this study, Acmispon argophyllus, a legume species found across five of the eight islands as well as on the mainland was used to test hypotheses at three spatial scales. Northern island populations have diverged into what potentially represents a new species; populations …

Go to article

The Unwanted Horse Population: A Survey, Shannon Alina Lindsey Dec 2013

The Unwanted Horse Population: A Survey, Shannon Alina Lindsey

Theses and Dissertations

Unwanted horses are a growing problem in the United States, and through the use of surveys, researchers can understand public opinion and experiences related to this problem. This study administered surveys specific to horse and non-horse owners through face-toace delivery and to rescue/retirement and auction facilities through the mail. Data was analyzed using a CRD, GLM and Fisher’s Protected LSD with á of 0.05. Comparisons were completed between horse and non-horse owners, horse owners and non-horse owners with equine experience, non-horse owners with and without equine experience, Quarter horse and other breeds owners, and auction and rescue/retirement facilities. Similarities were …

Go to article

The Mechanism By Which Oximes Reactivate Cholinesterases Inhibited By Organophosphates, Manikanthan Hari Naga Venkata Bhavaraju Dec 2013

The Mechanism By Which Oximes Reactivate Cholinesterases Inhibited By Organophosphates, Manikanthan Hari Naga Venkata Bhavaraju

Theses and Dissertations

The enzymes acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) are inhibited by nerve agents such as sarin and tabun. In general, the inhibited enzymes are reactivated by bisquaternary ammonium compounds (oximes). The binding free energies of the oximes; 2-PAM, MMB-4, HI-6, and obidoxime bound to human AChE (hAChE) and human BChE (hBChE) inhibited by sarin and tabun and also to the uninhibited enzymes were calculated using various computational methods. Using thermodynamic integration, the binding free energies of all the inhibited and uninhibited systems of MMB-4 and obidoxime were evaluated. The standard binding free energies (dA) were more negative than the experimental values …

Go to article

Association Between Stink Bug Damage And The Incidence Of Phomopsis Longicolla In Mississippi Soybean Production, Joshua Lunn Jones Dec 2013

Association Between Stink Bug Damage And The Incidence Of Phomopsis Longicolla In Mississippi Soybean Production, Joshua Lunn Jones

Theses and Dissertations

Stink bugs (Hemiptera: Pentatomidae) are key pests of soybean, Glycine max (L.), in Mississippi. Historically, yield loss derived from direct feeding by stink bugs has been considered the greatest threat to producers. However, quality reductions resulting from seed infections caused by microorganisms including Phomopsis longicolla are also a concern. Experiments were conducted in 2010 and 2011 to determine if stink bugs are associated with the incidence of P. longicolla in Mississippi soybean production. Data from experiments suggest that stink bugs are capable of transporting P. longicolla between two points. Data further suggest stink bugs and P. longicolla have the potential …

Go to article

Illinois State University, One Hundred And Fifty-Fourth Annual Commencement, December 14, 2013, Illinois State University Dec 2013

Illinois State University, One Hundred And Fifty-Fourth Annual Commencement, December 14, 2013, Illinois State University

Commencement Programs

Illinois State University
One Hundred and Fifty-Fourth Annual Commencement
December 14, 2013

Go to article

System Dynamics Simulation Model Of Salmonella Contamination Of Broiler Carcasses In The Chill Tank Of A Poultry Processing Plant, Karen Dazo Galarneau Dec 2013

System Dynamics Simulation Model Of Salmonella Contamination Of Broiler Carcasses In The Chill Tank Of A Poultry Processing Plant, Karen Dazo Galarneau

Theses and Dissertations

Salmonella has been studied and researched for more than a hundred years and yet it remains a problem for human and animal health. The goal of this dissertation was to apply the systems thinking approach to Salmonella contamination and develop a System Dynamics (SD) simulation model for Salmonella contamination in the chill tank of a poultry processing plant. But first the appropriate carcass rinse sampling method that would not impact on the resulting Salmonella contamination status of the broiler carcass was studied. Kappa agreement analysis was used to evaluate three sampling methods. The adjacent rinse method was found to be …

Go to article

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 …

Go to article

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 …

Go to article

Gender Characteristics And Barriers To Community College Leadership, Joanna Mcclellan Dec 2013

Gender Characteristics And Barriers To Community College Leadership, Joanna Mcclellan

Theses and Dissertations

Prior research has determined that there are still gender barriers that women must overcome to reach administrative positions in many employment settings. Gender barriers to leadership positions have been and continue to be a sensitive matter that must be addressed by community college administrators. This exploratory quantitative research study examined rural community college administrators’ perceptions about gender barriers and explored administrators’ perceptions about management styles based on gender. The study population included 596 community college administrators in the United States. Of those, 128 community college administrators chose to participate in this study and completed a 42-item researcher designed survey instrument …

Go to article

Evaluation Of Quantitative Polymerase Reaction And Microbial Volatile Organic Compounds To Determine Resistance To Aspergillus Flavus In Maize, Alicia Kay Wood-Jones Dec 2013

Evaluation Of Quantitative Polymerase Reaction And Microbial Volatile Organic Compounds To Determine Resistance To Aspergillus Flavus In Maize, Alicia Kay Wood-Jones

Theses and Dissertations

Screening for resistance to Aspergillus flavus and aflatoxin contamination in maize is an ongoing effort by universities, state and federal agencies. We evaluated two techniques to screen for resistance; quantitative polymerase reaction (QPCR) and solid-phase microextraction (SPME). Methods were adapted to accurately detect and quantify the fungus in culture and in the vegetative stage of plant tissues. These assays can eliminate microbiological techniques. The primary objectives of the study were to utilize 1) QPCR to detect and quantify fungal biomass in maize stem tissues to evaluate resistance in maize genotypes to A. flavus colonization in situ and in vivo and …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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. …

Go to article

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 …

Go to article

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 …

Go to article

Differentiation Of Fungal Phytopathogens By Ft-Ir And Maldi-Tof Ms, Curtis Muldrow Atkinson Dec 2013

Differentiation Of Fungal Phytopathogens By Ft-Ir And Maldi-Tof Ms, Curtis Muldrow Atkinson

Theses and Dissertations

The use of matrix assisted laser desorption ionization time-oflight mass spectrometry, Fourier transform infrared spectroscopy, and other analytical means of identifying and differentiating microorganisms hold much promise. These analytical tools have been extensively assessed for their ability to differentiate bacteria and fungi. Most of this research has been coordinated in medically relevant microorganisms, but the technology can work just as well with agriculturally important microorganisms. In this thesis, these technologies were reviewed and then subsequently studied for their ability to differentiate Aspergillus species (that devastate corn and other crops yearly with aflatoxin contamination), as well as Macrophomina phaseolina and Thielaviopsis …

Go to article

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 …

Go to article

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 …

Go to article

Algal Biodiesel Production Via Extractive-Transesterification Using Microwave And Ultrasound Irradiation, Edith L. Martinez-Guerra Dec 2013

Algal Biodiesel Production Via Extractive-Transesterification Using Microwave And Ultrasound Irradiation, Edith L. Martinez-Guerra

Theses and Dissertations

This study presents the use of non-conventional methods such as microwaves and ultrasound for algal biodiesel production. Dry algae biomass (Chlorella sp.) was used as feedstock to evaluate three novel single-step extractive-transesterification methods: 1) microwave irradiation with ethanol as solvent/reactant; 2) microwave irradiation with ethanol as reactant and hexane as solvent and 3) ultrasound irradiation with ethanol as solvent/reactant, all catalyzed by sodium hydroxide catalyst. The three novel methods were compared with the conventional Bligh and Dyer method which followed a two-step extraction and transesterification process. The maximum lipid yields for microwave, microwave with hexane, ultrasound, and Bligh and Dyer …

Go to article

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 …

Go to article

Characterization Of A Novel Ring-Type Ubiquitin E3 Ligase Ghring2 Involved In Cotton Fiber Development, Shiva Theja Reddy Soma Dec 2013

Characterization Of A Novel Ring-Type Ubiquitin E3 Ligase Ghring2 Involved In Cotton Fiber Development, Shiva Theja Reddy Soma

Theses and Dissertations

The ubiquitin-proteasome proteolysis pathway is responsible for the degradation of abnormal and short-lived proteins to regulate many important biochemical activities in eukaryotes. By employing affymetrix microarray analysis, we have identified a novel ubiquitin ligase E3 gene GhRING2 that is expressed differentially between two G. hirsutum lines - Texas Marker-1 and Chromosome Substitution Line CS-B25. The complete GhRING2 gene sequence was obtained by genomic and cDNA walking. The expression of GhRING2 in cotton fiber is developmentally regulated, suggesting that the ubiquitin-proteasome pathway may regulate cotton fiber growth and development. Using a yeast two-hybrid assay GhRING2 was found to interact with a …

Go to article

Characterization And Monitoring Of On-Farm Water Storage Systems In Porter Bayou Watershed, Mississippi, Richard Ludwig Kirmeyer Dec 2013

Characterization And Monitoring Of On-Farm Water Storage Systems In Porter Bayou Watershed, Mississippi, Richard Ludwig Kirmeyer

Theses and Dissertations

The onarm water storage (OFWS) systems at Metcalf and Pitts farm in Porter Bayou Watershed were monitored for changes in nutrient levels and water withdrawal for irrigation from March 2012 to April 2013. Nitrogen and phosphorus levels were generally higher during the early part of the growing season. The OFWS systems can reduce nitrate and phosphorus in runoff up to 81% and 85%, respectively. However, the systems did not consistently reduce sediment and nutrients especially after significant rainfall and runoff events. The systems provided a total of 130 and 233 acreeet of recycled water for irrigating crops at Metcalf and …

Go to article

Analysis Of Humeral And Femoral Cross-Sectional Properties At Morton Shell Mound (16ib3), Sarah Marie Zaleski Dec 2013

Analysis Of Humeral And Femoral Cross-Sectional Properties At Morton Shell Mound (16ib3), Sarah Marie Zaleski

Theses and Dissertations

Using the concept of bone functional adaptation, this study analyzes femoral and humeral cross-sectional properties of human skeletal materials from Morton Shell Mound on the Louisiana coast. This work helps fill a gap in such analyses in the southern U.S. and contributes to an understanding of the functional adaptation of the human skeleton. Properties were compared to those of other prehistoric Southeastern fisher-hunter-gatherers from Gold Mine, Plash Island, and several Georgia coast sites to assess mobility and activity patterns among inland and coastal groups. Less sexual dimorphism of femoral midshaft shape among coastal Morton and Plash, compared to inland Gold …

Go to article

Analysis Of Morphology And Fauna Of Geometrinae (Lepidoptera: Geometridae) Of The Caribbean Region, David M. Plotkin Dec 2013

Analysis Of Morphology And Fauna Of Geometrinae (Lepidoptera: Geometridae) Of The Caribbean Region, David M. Plotkin

Theses and Dissertations

The Geometrinae, commonly known as emerald moths, are a diverse group of Lepidoptera with over 450 Neotropical species. However, Caribbean Geometrinae have received relatively little attention compared to the Geometrinae of mainland Central and South America. Using the method of Lee and Brown (2006), whole body mounts of descaled specimens of both Caribbean and mainland Neotropical Geometrinae were prepared. Morphological variation of exo- and endoskeletal characters among species, genera, and tribes of Neotropical Geometrinae is described. A faunistic study of Caribbean Geometrinae was also conducted using material from museums and private collections. The study includes definitions of species of Caribbean …

Go to article

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 …

Go to article

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) …

Go to article

Molecular Basis Of Salmonella Enterica Serovar Kentucky Attachment To Broiler Skin, Sanaz Salehi Dec 2013

Molecular Basis Of Salmonella Enterica Serovar Kentucky Attachment To Broiler Skin, Sanaz Salehi

Theses and Dissertations

The presence of Salmonella enterica throughout the production and processing continuum is a concern in broiler industry. While federal regulations have lowered the acceptable level of Salmonella contamination on broiler carcasses, the mechanisms that contribute to pathogen attachment are not fully understood. Salmonella Kentucky has become the predominant Salmonella serovar isolated from broilers carcasses at the end of the immersion chill tank. In Europe and Africa this serovar has been shown to acquire antibiotic resistance genes that may lead this non-typhoidal serotype to become a potential public health concern. To investigate the genes that are involved in colonization of the …

Go to article

First Prev Next Last