Digital Commons Network^™

Influence Of Cultural Practices And Herbicides On Torpedograss [Panicum Repens (L.) Beauv.] Infestation In Centipedegrass [Eremochloa Ophiuroides (Munro, Hack)], James Taverner

LSU Master's Theses

Torpedograss (Panicum repens L. Beauv.) is a common weed problem along the Gulf Coast in highly managed turf. Non-selective herbicides are currently used to control torpedograss within centipedegrass [Eremochloa ophiuroides (Munro) Hack.] and St. Augustinegrass [Stenotaphrum secundatam (Walt.) Kuntze], but turfgrass injury can be extensive. Research was conducted to evaluate torpedograss and centipedegrass response to the application of the selective, post-emergence herbicides quinclorac, sethoxydim, and clethodim. Quinclorac applied at 0.42 kg ai ha-1 three times 4 wks apart reduced torpedograss to 25% coverage (55% of control) 10 weeks after initial treatment (WAIT), but re-establishment was rapid and by 16 WAIT …

Self-Healing Of Fiber Reinforced Polymer Compoistes [Sic], Nebiyu Fikru

LSU Master's Theses

The study of self-healing materials is inspired by biological systems in which damage triggers an autonomous healing response. In recent years, this concept of autonomic healing material, where initiation of repair is integral to the material, is being considered for engineering applications. The concept offers the designer an ability to incorporate secondary functional ability of counteracting service degradation in addition to achieving the primary, usually structural integrity, requirement. Self-healing materials also have the benefit of offering lighter and optimized structures as well as reduced maintenance cost. Previous works on polymer matrix composites have shown that significant fractions of mechanical properties …

Relationship Of Maternal Serum Fatty Acids And Body Mass Index, Emily Fontenot Gilbert

LSU Master's Theses

Maternal supply of nutrients is critical for the developing fetus during all stages of gestation. The altered lipid metabolism that is often seen in pregnancies complicated by obesity and insulin resistance may negatively impact maternal supply to the fetus. More women are entering pregnancy overweight or obese and recently body mass index (BMI) has been found to be a positive predictor for decreased maternal plasma phospholipid concentrations of the long-chain polyunsaturated fatty acids (LCPUFA) docosahexanoic acid (DHA) and arachidonic acid (ARA). These nutrients play important roles in early development and their availability is critical to fetal growth and development. The …

A Taphonomic Model Of Concealment: Decomposition And The Postmortem Interval (Pmi) In A 55-Gallon Barrel, Lauren Rebecca Pharr

LSU Master's Theses

Three 80-pound pigs used as human models were sealed inside 55-gallon black metal drums to monitor the rates and stages of decomposition of concealed, child-sized remains. Visual assessments of the anaerobic decomposition processes in each of the drums for Pigs A and B were possible through a Lexan window installed on each drums’ lid. The third pig—Pig C—was placed inside a drum with four one-half-inch holes permitting insect access and oriented in north, south, east, and west positions around the drum’s upper perimeter. Visual assessments of Pig C were made by lifting the drum’s lid; these assessments revealed that the …

Effects Of Fuels, Weather, And Management On Fire Severity In A Southeastern Pine Savanna, Mindy Claire Mccallum

LSU Master's Theses

Small scale heterogeneity in fire severity is important in pine flatwood communities of southeastern United States. Heterogeneity in fire severity, in turn, is important because if produces heterogeneity of vegetation in these habitats. By measuring fuel scorch and consumption immediately after a fire, I documented small-scale heterogeneity of fire severity. I found that pre-fire fuels and management had significant effects on fire severity, whereas weather did not. Weather, however, demonstrated variation over the 2007 fire season and is clearly a primary driver of fire behavior and effects in natural fire regimes (Johnson 1992). I attribute the lack of weather influence …

High School Students' Attitudes Toward Single-Sex Choir Versus Mixed Choir, Jenna Leigh Jackson

LSU Master's Theses

Participants in this project included high school choral students (N = 54) from central Mississippi and their directors (N = 3). Participants were enrolled both in a mixed choir and either an all boy or all girl choir. A survey was constructed by the researcher to determine the attitudes of the participants toward singing and participation in choir. The 32 survey statements fell into one of four categories: perception of self as singer, attitude about gender in choir, others’ perception of self in choir, and attitude toward choir. In addition, participants were asked to provide demographic data about their gender, …

Comparing Social Skills In Children With Autistic Disorder And Pervasive Developmental Disorder Not Otherwise Specified, Mary Elizabeth Shoemaker

LSU Master's Theses

Although in recent years there has been a large amount of research on Autism Spectrum Disorders (ASD) in general, relatively few studies have focused on Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS) as a distinct category. As a deficit in social skills is said to be the primary defining feature of ASD, continued research on assessment and treatment of social skills deficits in ASD is warranted. The present study aims to examine the differences in social skills between children diagnosed with Autistic disorder and PDD-NOS using the Matson Evaluation of Social Skills for Youngsters (MESSY). This study extends a previous …

Posttraumatic Stress Disorder In Women After Hurricane Katrina: Predictors And Symptom Endorsement, Julia E. Thompson

LSU Master's Theses

Hurricane Katrina devastated areas of New Orleans and caused the evacuation of most of the city’s residents. Many people were exposed to dangerous storms and flooding and lost many of their possessions. One of the most common psychological disorders following a disaster is Posttraumatic Stress Disorder. This study describes the PTSD symptom endorsement of a sample of women who experienced Hurricane Katrina. In addition, many of these women had previous trauma histories which are also described. Participants included 287 women from New Orleans, Jefferson and East Baton Rouge Parish recruited for a larger study on mother’s and children’s psychological functioning …

Effects Of Plant Maturity And Bacterial Inoculum Level On The Surface Contamination And Internalization Of Escherichia Coli O157:H7 In Growing Spinach, Shuaihua Pu

LSU Master's Theses

The incidence of foodborne outbreaks linked to fresh produce has increased in the United States. Particularly noteworthy was the 2006 Escherichia coli O157:H7 outbreak associated with pre-packaged baby spinach. Factors affecting the contamination of spinach leaves with E. coli O157:H7 are not yet well understood. This study aimed to determine whether E. coli O157:H7 would be present in the aerial leaf tissue of a growing spinach plant when introduced at various plant maturities and different inoculum levels in the growth media in a greenhouse setting. Spinach seeds of a standard commercial variety were sown individually in 8-inch pots, watered daily …

The Plame Game: Framing A Political Scandal, Misty Dawn Albrecht

LSU Master's Theses

The media play an important role in society. They interpret political events, actions, policies, and scandals in a manner that citizens can understand. The media use frames to assist in interpretations and descriptions. They may create their own frames or use frames supplied by the political elites. Frames can also lead to biased coverage when used to omit details or present someone in a favorable or unfavorable manner. This study examines the frames the media used during the coverage of President George W. Bush’s first political scandal, the “Plame Game.” On July 14, 2003, Robert Novak exposed the identity of …

A Study Of The Self-Assembly Of Water-Soluble Porphyrins In Aqueous Solution, Javoris Hollingsworth

LSU Master's Theses

In nature, self-assembly processes of biologically active organic molecules often occur, resulting in formation of dimers and higher oligomers of various and sometimes complex structures. This natural occurrence of self-organization has been the subject of research, with the aim of understanding and possibly modulating the aggregation behavior of biological molecules. The meso-tetrakis(4-phosphonatophenyl) porphyrin, H2TPPP was synthesized, purified, and characterized. Its self-assembly was studied in aqueous solutions as a function of pH and time. The variations on the λmax and shape of the Soret band of this porphyrin in the absorption spectra when altering the pH indicated the pH dependency in …

Nano-Mechanics Of Cartilage Glycosaminoglycans Using Molecular Dynamics Methods, Kevin Neil Hendrickson

Master's Theses

Articular Cartilage (AC) is the main load carrying material in synovial joints {Hamerman, 1962} and degeneration of AC can cause pain in the form of arthritis. Current work is centered on the method of replacing damaged cartilage inside the body (in vivo) with tissue engineered outside the body (ex vivo) {Temenoff, 2000}. In order to engineer tissue ex vivo similar to the native tissue in structure and function there must be a comprehensive understanding of the mechanical properties of AC. This work focuses on the study of glycosaminoglycans (GAGs), a molecule known to be primarily responsible for the compressive stiffness …

Identification Of The Function Of Rv0194 In Mycobacterium Tuberculosis, Rachel Philpott

All ETDs from UAB

No abstract provided.

The Role Of The Ss2-Integrin Family On T Cell Subsets, Jillian E. Wohler

All ETDs from UAB

Members of the ß2-integrin family of adhesion molecules, CD11a, CD11b, and CD11c, have all been shown to play a role in the pathogenesis of experimental autoimmune encephalomyelitis (EAE). CD11d had yet to be studied in demyelinating disease and its functions remained unclear. We report here that CD11d is the only member of the ß2-integrin family of adhesion molecules that fails to protect against the development of EAE. Surprisingly, the EAE studies suggested that CD11a, CD11b, and CD11c were all contributing to T cell activity during disease development by mechanisms beyond the migration of these cells into the CNS. However, the …

What Makes A “Good” Statistics Student And A “Good” Statistics Teacher In Service Courses?, Sue Gordon, Peter Petocz, Anna Reid

The Mathematics Enthusiast

Statistics is taught within a diverse array of disciplines and degree programs at university. In recent research we investigated international educators’ ideas about teaching and learning ‘service’ statistics. This paper investigates what these educators think are important attributes, knowledge and skills for learners and teachers of statistics. Results show that educators are in agreement about qualities of ‘good’ statistics students, such as curiosity and critical thinking. An emerging issue was the role mathematics plays in learning statistics as a service subject with some academics postulating mathematics as the basis of statistical learning, others proposing it has limited or little importance …

The Impact Of Undergraduate Mathematics Courses On College Student’S Geometric Reasoning Stages, Nuh Aydin, Erdogan Halat

The Mathematics Enthusiast

The purpose of this study is to investigate possible effects of different college level mathematics courses on college students’ van Hiele levels of geometric understanding. Particularly, since logical reasoning is an important aspect of geometric understanding, it would be interesting to see whether there are differences in van Hiele levels of students who have taken non-geometry courses that emphasize or focus on logic and proofs (Category I) and those that don’t (Category II). We compared geometric reasoning stages of students from the two categories. One hundred and forty nine college students taking various courses from the two categories have been …

Fostering Connections Between The Verbal, Algebraic, And Geometric Representations Of Basic Planar Curves For Student’S Success In The Study Of Mathematics, Margo F. Kondratieva, Oana G. Radu

The Mathematics Enthusiast

We discuss the significance of making connections between the verbal, algebraic, and geometric representations of basic mathematical objects for students’ understanding of mathematical instructions. Our survey of 499 students enrolled in a precalculus university course reveals that such connections are not always present, even if the objects themselves are familiar to the students. We stress that the ability of making these connections needs to be specifically addressed in teaching mathematics at various levels. A proper attention to the matter contributes to the formation of students’ mathematical background, which makes a difference for their success in study of calculus, in particular.

Unkept Promises : A Critical Analysis Of Hope Disclosed In Narratives Of African American Male Youth Living In Group Homes, Shadrach Linscomb

Doctoral Dissertations

unavailable

How Do Adolescent Students Experience Teacher-Student Interactions In A Seventh Grade Classroom And How Do Those Experiences Affect Their Self-Efficacy Beliefs?, Katherine Sanjiyan Barg

Doctoral Dissertations

unavailable

Cns Connections, Winter 2009-10, University Of Northern Iowa. College Of Natural Sciences.

CNS Connections

Inside this issue:

-- Message from the Dean
-- CNS explores alternative energy possibilities
-- CNS News in Short
-- Green promises kept at CEEE
-- Applause
-- Transitions
-- Summer camps help middle school students to experience science firsthand
-- CNS students in the news
-- IMSEP awards grants
-- Citizen Science aims to make science accessible
-- CNS team participates in project to explore Earth's interior
-- Faculty research
-- Imagine the impact
-- South campus trail provides portal to nature
-- Internationally distinguished UNI grad establishes teaching and learning award
-- Alumni News
-- CNS advisory board

2009 Lynn University Men's & Women's Tennis Media Guide, Lynn University Athletics

Athletics Media Guides

The 2009 Lynn University Men's and Women's Tennis Media Guide is a product of the Lynn University Sports Information Office.

Bacterial Community Profiling Of The Eastern Oyster (Crassostrea Virginica): Comparison Of Culture-Dependent And Culture-Independent Outcomes, Kenneth J. La Valley, Steve Jones, Marta Gomez-Chiarri, Joseph Dealteris, Michael A. Rice

Fisheries, Animal and Veterinary Sciences Faculty Publications

Tissue-associated bacterial community profiles generated using a nested polymerase chain reaction–denaturing gradient gel electrophoresis (DGGE) approach and culture-dependent and culture-independent isolation techniques were compared. Oyster samples were collected from 2 harvest areas along the coast of Maine, in the United States. Profiles from both isolation strategies were evaluated using Sorensen’s index of similarity and cluster analysis of gel banding patterns. Culture independent profiles were further evaluated using the Shannon diversity index. In general, the culture-dependent strategy resulted in a greater number of bands within a profile. Bacterial DGGE profiles were found to be highly similar within an isolation strategy, with …

Is Teleworking For Millennials?, Arlene J. Nicholas, Indira Guzman

Faculty and Staff - Articles & Papers

While research has examined generational attitudes regarding work, there are limited studies on the expectations of the newest workforce, the Millennials (born 1981- 1999). This study looks at the Millennials’ attitudes toward autonomy, work/life balance, perceived computer competence and its relationship with telework preference. Using a survey instrument, a sample representing 195 Millennials and 68 non-Millennials were scrutinized to determine their preferences by group. Partial support was found for the effect of autonomy and work/life balance toward the preference to telework. Millennials do not seem to prefer teleworking. However, differences between males and females depicted greater interest in males.

A Biochemical Study On The Regulation Of The Src And Fgfr Family Of Protein Tyrosine Kinases, David J. Kemble

Open Access Dissertations

The Src and FGFR family of protein tyrosine kinases (PTKs) are key mammalian enzymes in signal transduction. Regulating their enzymatic activity is imperative and disrupting this regulation can lead to devastating outcomes, including cancer. Our primary focus is to dissect the structure-function relationship that guides the regulation of PTKs. In this study we used site directed mutageneis, bacterial expression, and kinetic analysis to investigate how Src and FGFR PTKS is regulated by Reactive Oxygen Species (ROS) and autophosphorylation. Accumulating evidence suggests that protein tyrosine phosphorylation-based pathways are under the regulation of Reactive Oxygen Species (ROS). Although protein tyrosine phosphatases are …

Development And Validation Of A Weight-Related Behaviors Questionnaire, Susan M. Schembre

Open Access Dissertations

Research shows the prevalence of obesity is increasing. The greatest increase occurs between 20 and 29 years of age. Obesity results from a long-term positive energy balance attributable to eating and exercise behaviors. Research shows effective behavior change interventions impact cognitive constructs which explain specific behaviors. Objectives were to develop and validate a weight-related behaviors questionnaire (WRBQ) for young adults with individual eating and exercise behavior scales and explore the impact of the scales to explain patterns of energy intake and exercise participation. The sample (N-721) consisted of 18 to 24 year old females (69.5%) and males (30.5%) with a …

Redefining Motherhood: Discrimination In Legal Parenthood In Japan, Rachel Brehm King

Washington International Law Journal

Due to Japan’s decreasing population numbers and low birth rate, the country’s legal forces and social norms put tremendous pressure on women to have children. To meet these expectations, Japanese women frequently turn to new forms of medical assistance called Assisted Reproductive Technology (“ART”) to increase their ability to become mothers. ART includes such procedures as artificial insemination, in vitro fertilization, and surrogacy. Although several of these methods are accepted by Japanese law and society, other forms of ART, including certain forms of artificial insemination and surrogacy, are strongly disapproved. Japan’s current legal framework prevents women from accessing the full …

Coiled-Coil-Mediated Dimerization Is Not Required For Myosin Vi To Stabilize Actin During Spermatid Individualization In Drosophila Melanogaster, Tatsuhiko Nogushi, Deborah J. Frank, Mamiko Isaji, Kathryn G. Miller

Biology Faculty Research

Myosin VI is a pointed-end-directed actin motor that is thought to function as both a transporter of cargoes and an anchor, capable of binding cellular components to actin for long periods. Dimerization via a predicted coiled coil was hypothesized to regulate activity and motor properties. However, the importance of the coiled-coil sequence has not been tested in vivo. We used myosin VI's well-defined role in actin stabilization during Drosophila spermatid individualization to test the importance in vivo of the predicted coiled coil. If myosin VI functions as a dimer, a forced dimer should fully rescue myosin VI loss of function …

Small Rna-Directed Heterochromatin Formation In The Context Of Development: What Flies Might Learn From Fission Yeast, Kathryn Huisinga, Sarah C.R. Elgin

Biology Faculty Research

A link between the RNAi system and heterochromatin formation has been established in several model organisms including Schizosaccharomyces pombe and Arabidopsis thaliana. However, the data to support a role for small RNAs and the associated machinery in transcriptional gene silencing in animal systems is more tenuous. Using the S. pombe system as a model, we analyze the role of small RNA pathway components and associated small RNAs in regulating transposable elements and potentially directing heterochromatin formation at these elements in Drosophila melanogaster.

A Brief Reflection On The Problem Of Person-Altering Consequences, Gregory S. Crespi

Faculty Journal Articles and Book Chapters

Many social policies require substantial sacrifices by existing persons in order to benefit the yet-unborn members of future generations. There is a substantial consensus that we do have ethical obligations to consider the interests of those future persons in our decisions. However, the questions of whether we do in fact have such ethical obligations, and if so then how to properly balance those obligations with our obligations to existing persons, are greatly complicated by the often-overlooked "problem of person-altering consequences." This brief essay is intended to communicate to a broad readership the nature and scope of this problem and its …

Social Factoring The Numbers With Assisted Reproduction, Lolita Buckner Inniss, Bridget J. Crawford

Faculty Journal Articles and Book Chapters

In early 2009 the airwaves came alive with sensational stories about Nadya Suleman, the California mother who gave birth to octuplets conceived via assisted reproductive technology. Nadya Suleman and her octuplets are vehicles through which Americans express their anxiety about race, class and gender. Expressions of concern for the health of children, the mother's well-being, the future of reproductive medicine or the financial drain on taxpayers barely conceal deep impulses towards racism, sexism and classism. It is true that the public has had a longstanding fascination with multiple births and with large families. This is evidenced by a long history …