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Individual Tree Growth And Yield Models For Red Oak - Sweetgum Stands On Mid-South Minor Stream Bottoms Producing Volume By Log Grade, Jonathan Paul Jeffreys May 2014

Individual Tree Growth And Yield Models For Red Oak - Sweetgum Stands On Mid-South Minor Stream Bottoms Producing Volume By Log Grade, Jonathan Paul Jeffreys

Theses and Dissertations

Bottomland hardwood stands of the Mid-South region of the United States are some of the most productive forests in the country. A large percentage of these stands are owned by nonindustrial private forest landowners, who have little information on which to base management decisions. These stands are, therefore, a largely unmanaged and under-utilized reserve of high quality hardwoods. To provide landowners with a decision-making tool for comparing management scenarios, a growth and yield study was initiated in 1981. One hundred and fifty permanent plots were installed in red oaksweetgum stands. The study has been remeasured three times over the past …

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Influence Of Coastal Processes On Speleogenesis And Landforms In The Caribbean Region, Patricia Kambesis May 2014

Influence Of Coastal Processes On Speleogenesis And Landforms In The Caribbean Region, Patricia Kambesis

Theses and Dissertations

Evolution of rocky coastlines is controlled by littoral, biological and fluvial processes. Resultant landforms are overprinted and/or new ones formed as a result of changes in sea level caused by glacioeustasy and/or local tectonics. On carbonate coasts, chemical erosion in the form of karstification takes on a dominant role. Type of karstification is an important factor in understanding carbonate coast evolution and landform development so it is critical to identify type of karstification. In this research, fractal indices were used to distinguish cave and thus karstification type. It was determined that fractal indices effectively differentiated cave types and the indices …

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Insights On Protein Structure And Dynamics From Temperature-Dependent Molecular Dynamics And Normal Mode Analysis, Habib Ur Rehman May 2014

Insights On Protein Structure And Dynamics From Temperature-Dependent Molecular Dynamics And Normal Mode Analysis, Habib Ur Rehman

Theses and Dissertations

In this thesis we have employed two computational approaches, temperature-dependent molecular dynamics (MD) and normal mode analysis (NMA), to gain insights into the structureunction relationships between three structurally-related proteins, each possessing a central alpha/beta core. The three proteins studied here are: pnbCE from Bacillus subtilis, cutinase from Fusarium solani - both belong to the serine hydrolase family - and TTHA1554, from the thermophile Thermus thermophilus. Mutations at the gate residue 362, located at the side-door of the pnbCE enzyme, are known to alter the catalytic activity of this enzyme. In this work the modifications induced by mutating LEU362 on the …

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Livelihood Strategies And Lifestyle Choices Of Fishers Along The Mississippi Gulf Coast, Sarah A. Harrison May 2014

Livelihood Strategies And Lifestyle Choices Of Fishers Along The Mississippi Gulf Coast, Sarah A. Harrison

Theses and Dissertations

This study was initiated to assess the biological, ecological and sociological aspects of the blue crab, Callinectes sapidus, fishery associated with the Pascagoula River Estuary in southern Mississippi. Household surveys were conducted in the cities of Moss Point and Pascagoula, Mississippi, September 2010 to September 2011, to identify, describe and classify subsistence fishing activities associated with the estuary. A stock assessment of blue crab was conducted to determine how biological and environmental variability affect the people engaged in this subsistence fishery. The study revealed two types of subsistence fishing occurring in the Moss Point/Pascagoula area. The first type involves fishing …

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Mechanical And Cultural Practices To Reduce Skinning In Sweetpotato, Bradley Hodge Hayes May 2014

Mechanical And Cultural Practices To Reduce Skinning In Sweetpotato, Bradley Hodge Hayes

Theses and Dissertations

Sweetpotato (Ipomoea batatas (L.) Lam.) is one of the major tropical root crops of the world and it is widely distributed throughout the tropical and temperate regions of Africa, Asia and the Americas. During harvest and post-harvest handling, the skin can be separated from the underlying tissue of the storage root. Storage root damage contributed to income losses for producers. To minimize these loses, producers set the skin of the sweetpotato by removal of the vines prior to harvest. New mechanical (undercutting) and cultural (biochar) methods were developed and tested. Mechanical undercutting would sever the feeder roots of the plant …

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Metabolic Health And Academic Achievement In At Risk Youth Participating In Studio Based Summer Camp, Mallory Anne Kvasnicka May 2014

Metabolic Health And Academic Achievement In At Risk Youth Participating In Studio Based Summer Camp, Mallory Anne Kvasnicka

Theses and Dissertations

Childhood obesity and subsequent poor health implications continue to be a critical health concern and recent literature suggests academics may also be under greater strain among these individuals. This study examined the relationship between metabolic health and academic achievement in students “at risk” for drop. Fifteen adolescences participated in an educational camp aimed at developing knowledge of core curriculum by developing design projects. Metabolic health was assessed via biochemical measurements of blood lipid and glucose, resting blood pressure, and anthropometric measurements of height, weight, and waist circumference. Variables were examined individually and as a combined risk score. Academic achievement measurements …

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Microtubule Dynamics, Kinetochore Number, And Kinetochore Distribution In Cells Undergoing Mitosis With Unreplicated Genomes, Manuella Rossette Clark-Cotton May 2014

Microtubule Dynamics, Kinetochore Number, And Kinetochore Distribution In Cells Undergoing Mitosis With Unreplicated Genomes, Manuella Rossette Clark-Cotton

Theses and Dissertations

In cells undergoing mitosis with unreplicated genomes (MUG), anaphase is successfully initiated despite the abundance of kinetochores that are attached to microtubules emanating from both spindle poles (merotely). In cultured cells, merotely is associated with lagging at the metaphase plate. Treatment with microtubule-perturbing drugs alters the frequency of lagging, but the effect of these drugs on MUG cells is unclear. In this study, low doses of a microtubule-stabilizing drug, taxol, or a microtubule-destabilizing drug, nocodazole, dramatically increased the frequency of lagging kinetochores in the midbody of MUG daughter cell pairs. Likewise, increasing the kinetochore number increased the frequency of lagging …

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Genotype, Nitrogen And Harvest Management Effects On Switchgrass Production, Ramdeo Seepaul May 2014

Genotype, Nitrogen And Harvest Management Effects On Switchgrass Production, Ramdeo Seepaul

Theses and Dissertations

Use of switchgrass (Panicum virgatum L.) as a forage and feedstock species requires knowledge of fertilizer application rates and harvest timing to optimize yield and quality. Three experiments were conducted at the Brown Loam Branch Experiment Station, Raymond, MS to quantify nitrogen rates, harvest timing, and genotype effects on biomass, nutrient removal, chemical composition and ethanol yield. Dry matter yield varied with N rate, genotype, harvest frequency and timing. Yields among genotypes were: NF/GA992 = NF/GA001 (13.7 Mg ha-1) > Alamo (11.6 Mg ha-1) > Cave-in-Rock (6.1 Mg ha-1). A single (9.5 Mg ha-1) or two harvests annually (10.3 Mg ha-1) produced …

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Growth Models And Profile Equations For Exotic Tallow Tree (Triadica Sebifera) In Coastal Mississippi, Nana Tian May 2014

Growth Models And Profile Equations For Exotic Tallow Tree (Triadica Sebifera) In Coastal Mississippi, Nana Tian

Theses and Dissertations

Chinese tallow tree (Triadica sebifera (L.)) has become a threat to Southern United States forestlands because of the rapid colonization. To explore the growth rate of tallow, numerous growth models were constructed with destructive sampling method from oak-gum-cypress (Quercus/Liquidambar styraciflua/Taxodium distichum) and longleaf/slash pine (Pinus taeda/ Pinus echinata) forests in southern Mississippi. Moreover, stem profile was also fitted with segmented profile models: Max and Burkhart (1976), Cao (2009) modified Max and Burkhart, and Clark et al. (1991). Numerous results showed that: 1) diameter at breast height, volume and biomass of tallow grew faster in oak-gum-cypress forest while height grew faster …

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Herbicide Safening To Aid In The Establishment Of Three Native Warm Season Grass Species, Jesse Spencer Smith May 2014

Herbicide Safening To Aid In The Establishment Of Three Native Warm Season Grass Species, Jesse Spencer Smith

Theses and Dissertations

Difficulties with stand establishment are a major factor limiting further agronomic use of native warm season grasses. One significant cause of stand failure is competition with rapidly growing annual weed species during the early development of the perennial native grass. Broad spectrum preemergent herbicides can provide the needed weed control, but only if tolerance exists in the desired grass. Herbicide safeners, synthetic compounds that protect crops from herbicide injury, applied as seed treatments offer a potential strategy to achieving the needed herbicide tolerance where it does not naturally occur. This study tested the efficacy of five herbicide safeners (benoxacor, fenclorim, …

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Identification Of The Edwardsiella Ictaluri Genes Causing Impaired Growth In Complex Medium, Safak Kalindamar May 2014

Identification Of The Edwardsiella Ictaluri Genes Causing Impaired Growth In Complex Medium, Safak Kalindamar

Theses and Dissertations

Edwardsiella ictaluri is the causative agent of enteric septicemia of catfish (ESC). Although some virulence mechanisms in E. ictaluri have been identified, further research is needed to discover new virulence genes, which could be used to develop safe and efficacious live vaccines. Here, we report production of growth deficient E. ictaluri mutants on complex agar media and identification of genes causing this growth deficiency. The overall goal of this project is to generate growth deficient E. ictaluri mutants and identify genes causing this growth deficiency on complex media. Mutants exhibiting slow growth in complex media may be potential candidates for …

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Identifying Adopters Of Best Management Practices Within Mississippi Beef Producers And The Reasons For Non-Adoption, M Scott Cagle May 2014

Identifying Adopters Of Best Management Practices Within Mississippi Beef Producers And The Reasons For Non-Adoption, M Scott Cagle

Theses and Dissertations

The goal of the Mississippi State University Extension Service (MSU-ES) is to improve the quality of life for all Mississippians. One specific group that agricultural change agents work with at the county level is beef producers. Grazing lands have received much attention over the last few years regarding environmental concerns and Best Management Practices (BMPs) for beef cattle operations. The adoption of these practices was voluntary during the time this study was conducted, however; adoption was highly encouraged by the MSU-ES and the Natural Resources Conservation Service (NRCS). By knowing the level of adoption of BMPs that Mississippi beef producers …

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Evaluation Of Sediment And Nutrient Loss During The Revegetation Of Mississippi Roadsides, Kyle R. Briscoe May 2014

Evaluation Of Sediment And Nutrient Loss During The Revegetation Of Mississippi Roadsides, Kyle R. Briscoe

Theses and Dissertations

Runoff during the revegetation of roadsides can transport sediment and nutrients offsite, leading to surface water quality reductions. Two field experiments were conducted near Starkville, MS in 2011 and 2012 to evaluate the influence of N and P sources and rates, fertilization timing, and mulch type on vegetative establishment and nutrient and sediment runoff losses. Stainless steel runoff frames (0.75 x 2.0 m) were installed on 10% and 15% slopes for Experiment I and Experiment II, respectively. A bahiagrass (Paspalum notatum Flugge), tall fescue [Schedonorus arundinaceus (Schreb.) Dumort., nom. cons.], sericea lespedeza [Lespedeza cuneata (Dum. Cours.) G. Don], and common …

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Feasibility Of Consistently Estimating Timber Volume Through Landsat-Based Remote Sensing Applications, Renaldo Josue Salazar Arroyo May 2014

Feasibility Of Consistently Estimating Timber Volume Through Landsat-Based Remote Sensing Applications, Renaldo Josue Salazar Arroyo

Theses and Dissertations

The Mississippi Institute for Forest Inventory (MIFI) is the only cost-effective large-scale forest inventory system in the United States with sufficient precision for producing reliable volume/weight/biomass estimates for small working circle areas (procurement areas). When forest industry is recruited to Mississippi, proposed working circles may overlap existing boundaries of bordering states leaving a gap of inventory information, and a remote sensing-based system for augmenting missing ground inventory data is desirable. The feasibility of obtaining acceptable cubic foot volume estimates from a Landsat-derived volume estimation model (Wilkinson 2011) was assessed by: 1) an initial study to temporally validate Landsat-derived cubic foot …

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Fiber Loop Ringdown Gas Flow And Humidity Sensors, Haifa Hassan Alali May 2014

Fiber Loop Ringdown Gas Flow And Humidity Sensors, Haifa Hassan Alali

Theses and Dissertations

Fiber optics has been utilized in fiber optic, sensing technology, imaging optics, communications, etc. Fiber optic sensors have been developed to sense in many applications. In this thesis, fiber loop ringdown (FLRD) sensors were used to monitor two different physical sensors, such as gas flow and humidity. FLRD gas flow sensors were demonstrated. Two different sensor configurations were constructed to monitor airflow (AF). FLRD-AF sensor was based on micro-bending mechanism. The FLRD-AF sensor was able to detect AF in a range of 5 to 22.5 slpm. FLRD technique was also used to measure relative humidity (RH). A sensor was fabricated …

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A Petroleum Energy, Greenhouse Gas, And Economic Life Cycle Analysis Of Several Automotive Fuel Options, Matthew Carter Doude May 2014

A Petroleum Energy, Greenhouse Gas, And Economic Life Cycle Analysis Of Several Automotive Fuel Options, Matthew Carter Doude

Theses and Dissertations

A vehicle fuel’s life does not begin when that fuel is pumped into the tank or the battery is charged. Each kilowatt-hour of fuel that is used has a history traceable back to its original feedstock, be it crude oil, corn, solar energy, or others. In this thesis, a life cycle analysis is performed on E10, E85, B20, hydrogen, and electricity, with the well-to-pump fossil fuel energy use and greenhouse gas emissions compared. Results are presented in the form of either energy or mass per kilowatt of fuel at the plug or at the pump. An analysis of the economic …

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Imitation Skill Development In Children With Autism Spectrum Disorders: Teacher-Directed Versus Child-Directed Tasks, Claire Elizabeth Karlen May 2014

Imitation Skill Development In Children With Autism Spectrum Disorders: Teacher-Directed Versus Child-Directed Tasks, Claire Elizabeth Karlen

Theses and Dissertations

Imitation, defined as a means by which individuals copy another person's behavior, serves as a natural method of learning for typically developing children (Sevlever & Gillis, 2010). For children with autism, imitation skills are often impaired, which may result in further social and language deficits (Ingersoll, 2008; Whiten & Brown, 1999). The current study directly examined the effectiveness of two imitation training interventions on the development of spontaneous imitation and expressive language skills in young children diagnosed with autism spectrum disorders. Results indicated that no one intervention proved equally effective across participants; however, both interventions positively impacted expressive language development, …

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High Speed Atomic Force Microscope Design Using Dvd Optics, Thomas Carlson May 2014

High Speed Atomic Force Microscope Design Using Dvd Optics, Thomas Carlson

Theses and Dissertations

We examine the design of a high speed atomic force microscope using an optical pickup from a commercially available compact disc/digital versatile disc drive. An investigation of the commercial optical pickup is done with the goal of determining how it can be used for dimensional measurements on nanometer scale. An evaluation of noise sources, imaging capabilities, and functionality is performed.

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Approaches To Reduce Selection Of Genomic Variants In Human Pluripotent Stem Cell Culture, Marion Riggs May 2014

Approaches To Reduce Selection Of Genomic Variants In Human Pluripotent Stem Cell Culture, Marion Riggs

Theses and Dissertations

Optimizing culture conditions that reduce genomic instability in human pluripotent stem cells (hPSCs) is an unmet challenge in the field. Results from our lab and numerous research groups demonstrate that hPSCs are prone to genomic aberrations and single-cell passaging increases the rate of genomic alterations. However, single-cell based passaging maintains advantages for scale-up and standardizing differentiation protocols. In this study, we investigated the problem of genomic instability in hPSC cultures with the goal towards identifying and characterizing candidate genes that could contribute to generation and survival of abnormal hPSCs. Based on microarray analysis, we identify ARHGDIA, located on 17q25, as …

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Characterization Of Suf Pathway For Fe-S Cluster Assembly In Escherichia Coli, Yuyuan Dai May 2014

Characterization Of Suf Pathway For Fe-S Cluster Assembly In Escherichia Coli, Yuyuan Dai

Theses and Dissertations

Fe-S clusters are critical metallocofactors required for cell function. Because of the toxicity of ferrous iron and sulfide to the cell, in vivo Fe-S cluster assembly is carried out by multiprotein biosynthetic pathways. Escherichia coli contains a stress-responsive Fe-S cluster assembly system, the SufABCDSE pathway, working under iron starvation and oxidative stress conditions. The cysteine desulfurase SufS and its accessory protein SufE work together to mobilize persulfide from L-cysteine. We collaborated with Dr. Laura S. Busenlehner to use hydrogen/deuterium exchange mass spectrometry (HDX-MS) to characterize SufS-SufE interactions and protein dynamics. HDX-MS analysis shows that SufE binds near the SufS active …

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Identification Of Microrna Biomarkers In Her2-Positive Breast Cancer, Hossam Tashkandi May 2014

Identification Of Microrna Biomarkers In Her2-Positive Breast Cancer, Hossam Tashkandi

Theses and Dissertations

Human epidermal growth factor receptor 2 (HER2) is overexpressed in approximately 30% of breast cancer patients with poor prognosis. In addition, microRNAs are small non-coding RNA that have been linked to many cancers. Here we investigate which miRNAs are differentially regulated by HER2 overexpression. Using quantitative reverse-transcription prolymerase chain reaction (QRT-PCR) and matching it with the clinical data acquired from Dvinge, we find five candidate miRNAs. When comparing the miRNAs’ effect on patient survival, only three miRNAs stand as good predictors of patient survival outcome. These miRNAs are miR-146a-5p, miR-181d, and miR-195-5p. When miR-146a-5p is up-regulated, which is the case …

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Potential Energy And The Three Odalisques, Yamins Roxanne May 2014

Potential Energy And The Three Odalisques, Yamins Roxanne

Theses and Dissertations

The goal of this paper is to examine some ways in which BEHAVIOR, POTENTIAL ENERGY, and EMPATHY are critical components in my thinking and work. The impetus for my work is an investigation of how these three components can be manifested in visually expressive and powerful states. My masters thesis, The Three Odalisques, is an attempt at making a space and world which privileges these components and the potential for art to express these ideas. This paper is divided into two parts. The first section is a formal analysis of the pieces in my work from my MFA thesis show. …

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Mandibular Incisor Proclination Variability During Class Ii Correction, James Redford May 2014

Mandibular Incisor Proclination Variability During Class Ii Correction, James Redford

Theses and Dissertations

Background: Lower incisor proclination has been shown to increase during Class II correction with appliances such as the Forsus. This lower incisor flaring shows great variability among patients. The purpose of this study was to evaluate the effects of Class II severity, mandibular growth, and occlusal plane rotation on lower incisor flaring in patients treated with the Forsus appliance. Materials and Methods: 121 records of Class II patients treated with the Forsus appliance were analyzed retrospectively. Cephalograms were traced at three time points. ANOVA was used to compare changes in cephalometric measurements over time. Pearson’s correlation was used to test …

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Artificial Dissemination, Brian Fleetwood May 2014

Artificial Dissemination, Brian Fleetwood

Theses and Dissertations

This writing is an experiment in combining the two most important frameworks through which I understand the world, the storytelling traditions of my people, the Mvskoke(Creek), and the rational tradition that began with European Enlightenment era thinking. By weaving allegorical narrative (much of it personal) into theoretical speculation, I draw connections between recollection, truth, and the act of making. This examination of the gaps and connections between seemingly disparate worldviews, runs in parallel to the purpose of my work, wherein I construct fictive symbiotic and parasitic relationships between jewelry and wearer. This work takes advantage of the wearer as environment, …

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Thinking Bodies And Sensational Minds: Affect And Embodiment In Contemporary Art, Sandra Burke May 2014

Thinking Bodies And Sensational Minds: Affect And Embodiment In Contemporary Art, Sandra Burke

Theses and Dissertations

The human subject is profoundly interdependent, in relation to other people and to the surrounding environment, both “natural” and technological. Western dualistic thinking creates bounded and oppositional categories and generates a conception of human subjects as autonomous, self-sufficient beings that are transparent to themselves and in control of self, other, and world. This contributes to the ongoing inequalities in society and supports normative hegemony. This dissertation argues that it is imperative to insist on the intersubjective, permeable, and contingent qualities of existence. While this project is preceded by a great deal of theoretical criticism of Western metaphysical dualism, we must …

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Signal-To-Noise Measurements And Particle Focusing In Liquid-Core Waveguides, Michael A. Olson May 2014

Signal-To-Noise Measurements And Particle Focusing In Liquid-Core Waveguides, Michael A. Olson

Theses and Dissertations

This thesis presents an analysis of the signal-to-noise ratio in liquid core anti-resonant reflecting optical waveguides (ARROWs) and the application of hydrodynamic focusing to the waveguides. These concepts are presented as a method to improve the detection capabilities of the ARROW platform. The improvements are specifically targeted at achieving single molecule detection (SMD) with the devices. To analyze the SNR of the waveguides a test platform was designed and fabricated. This test platform was then used to examine relationship between the SNR and the location of the excitation region. It was determined that the excitation region should be moved closer …

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A Passive Acoustic And Experimental Study Of Juvenile Blue Catfish, Ictalurus Furcatus, Sound Production And Agnostic Behavior In The Tidal Freshwater James River, Laura Morgan May 2014

A Passive Acoustic And Experimental Study Of Juvenile Blue Catfish, Ictalurus Furcatus, Sound Production And Agnostic Behavior In The Tidal Freshwater James River, Laura Morgan

Theses and Dissertations

Blue catfish, Ictalurus furcatus, are an invasive species in the James River, VA. They produce stridulation sounds and passive acoustic monitoring may prove useful in locating and monitoring their populations. Little is known about their behavior, therefore my goal was to examine agonistic behavior and the use of sound in defending a territory. This thesis consists of two manuscripts: 1) A passive acoustic study of the tidal freshwater James River, 2) An experimental study of agonistic behavior in juvenile Blue catfish, Ictalurus furcatus. The first study showed that three sounds (click, run croak) occurred more often in warmer months than …

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Design And Experimental Testing Of Nanoinjection Protocols For Delivering Molecules Into Hela Cells With A Bio-Mems Device, Zachary Kendall Lindstrom May 2014

Design And Experimental Testing Of Nanoinjection Protocols For Delivering Molecules Into Hela Cells With A Bio-Mems Device, Zachary Kendall Lindstrom

Theses and Dissertations

Delivering foreign molecules into living cells is a broad and ongoing area of research. Gene therapy, or delivering nucleic acids into cells via non-viral or viral pathways, is an especially promising area for pharmaceutics. All gene therapy methods have their respective advantages and disadvantages, including limited delivery efficiency and low viability. Nanoinjection, or delivering molecules into cells using a solid lance, has proven to be highly efficient while maintaining high viability levels. In this thesis, an array of solid silicon lances was tested by nanoinjecting tens of thousands of HeLa cancer cells simultaneously. Several molecule types were injected in different …

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Planar Cell Polarity And Neurodevelopment, Simon Sun May 2014

Planar Cell Polarity And Neurodevelopment, Simon Sun

Theses and Dissertations

Planar cell polarity (PCP) is a developmental signaling mechanism that establishes a polarity within the plane of an epithelium. PCP has been shown to play a role in guiding numerous neurodevelopmental processes such as convergent extension, neuron migration, and axon pathfinding. Certain commissural neurons in the dorsal spinal cord make a series of guidance decisions en route to the brain: first, a ventral projection along the D-V axis, followed by a midline crossing, and after exiting the floorplate, a dorso-anterior turn along the A-P axis. Here, we provide in vivo evidence that the axons of the Commissural Primary Ascending (CoPAs) …

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Understanding The Role Of Stylochus Ellipticus As A Predator Of Crassostrea Virginica In Chesapeake Bay Tributaries, Marion Kensey Barker May 2014

Understanding The Role Of Stylochus Ellipticus As A Predator Of Crassostrea Virginica In Chesapeake Bay Tributaries, Marion Kensey Barker

Theses and Dissertations

Predation may be a key component of the unsuccessful restoration of the Eastern Oyster (Crassostrea virginica), a former keystone species in Chesapeake Bay. Here, I examine the polyclad flatworm Stylochus ellipticus and its potential role as an important predator of C. virginica. Using small-fragment size C. virginica specific DNA primers, oyster DNA was successfully detected in whole organisms homogenates of wild-caught S. ellipticus individuals. Of the 1,575 individuals tested, 68.1% tested positive, thus predation occurred. Predation did not appear to be affected by salinity or temperature; however, season did appear to have an effect on both predation and S. ellipticus …

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