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Sperm Quality Assessments For Endangered Razorback Suckers Xyrauchen Texanus, Jill A. Jenkins, Bruce E. Eilts, Amy M. Guitreau, Chester R. Figiel, Rassa O. Draugelis-Dale, Terrence R. Tiersch Jan 2011

Sperm Quality Assessments For Endangered Razorback Suckers Xyrauchen Texanus, Jill A. Jenkins, Bruce E. Eilts, Amy M. Guitreau, Chester R. Figiel, Rassa O. Draugelis-Dale, Terrence R. Tiersch

Faculty Publications

Flow cytometry (FCM) and computer-assisted sperm motion analysis (CASA) methods were developed and validated for use with endangered razorback suckers Xyrauchen texanus collected (nZ64) during the 2006 spawning season. Sperm motility could be activated within osmolality ranges noted during milt collections (here 167-343 mOsm/kg). We hypothesized that sperm quality of milt collected into isoosmotic (302 mOsm/kg) or hyperosmotic (500 mOsm/kg) Hanks' balanced salt solution would not differ. Pre-freeze viabilities were similar between osmolalities (79%G6 (S.E.M.) and 76%G7); however, post-thaw values were greater in hyperosmotic buffer (27%G3 and 12%G2; PZ0.0065), as was mitochondrial membrane potential (33%G4 and 13%G2; PZ0.0048). Visual estimates …

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Habitat Use Does Not Reflect Habitat Quality For Henslow's Sparrows (Ammodramus Henslowii) Wintering In Fire-Managed Longleaf Pine Savannas, Erik I. Johnson, Jennifer K. Dimiceli, Philip C. Stouffer, Matthew E. Brooks Jan 2011

Habitat Use Does Not Reflect Habitat Quality For Henslow's Sparrows (Ammodramus Henslowii) Wintering In Fire-Managed Longleaf Pine Savannas, Erik I. Johnson, Jennifer K. Dimiceli, Philip C. Stouffer, Matthew E. Brooks

Faculty Publications

Interpreting habitat quality requires an understanding of the consequences of habitat use because bird density alone may not reflect habitat quality. Although habitat use can be readily quantified, subsequent effects remain elusive for most species, especially for migrants on the wintering grounds. Wintering Henslow's Sparrow (Ammodramus henslowii) densities in Longleaf Pine (Pinus palustris) savannas are fire-dependent, with highest bird densities in the first winter after a fire, but reduced density in subsequent winters without fire. We determined habitat characteristics associated with variation in bird density in the first and second winters following fire and then followed birds' diet, condition, and …

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Repeatability And Number Of Growing Seasons For The Selection Of Custard Apple Progenies, Julio César Dovale, Paulo Sérgio Lima E Silva, Gustavo Sessa Fialho, Keny Henrique Mariguele, Roberto Fritsche-Neto Jan 2011

Repeatability And Number Of Growing Seasons For The Selection Of Custard Apple Progenies, Julio César Dovale, Paulo Sérgio Lima E Silva, Gustavo Sessa Fialho, Keny Henrique Mariguele, Roberto Fritsche-Neto

Faculty Publications

This study aimed to estimate the repeatability coefficient and determine the minimum number of samples required for effective selection for yield of custard apple. Twenty progenies were evaluated in randomized blocks, five replications and four plants per plot. The fruits were collected, counted and weighed every two days of the year. Estimates of the repeatability coefficients were obtained by the methods of analysis of variance - ANOVA and principal components - PC. The estimates from the repeatability analysis of biennial data are higher than those based on individual years. The estimates of the PC method were accurate even in the …

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The Difference Between Breeding For Nutrient Use Efficiency And For Nutrient Stress Tolerance, Ciro Maia, Júlio César Dovale, Roberto Fritsche-Neto, Paulo Cezar Cavatte, Glauco Vieira Miranda Jan 2011

The Difference Between Breeding For Nutrient Use Efficiency And For Nutrient Stress Tolerance, Ciro Maia, Júlio César Dovale, Roberto Fritsche-Neto, Paulo Cezar Cavatte, Glauco Vieira Miranda

Faculty Publications

This study aimed to verify the relationship between breeding for tolerance to low levels of soil nutrients and for nutrient use efficiency in tropical maize. Fifteen inbred lines were evaluated in two greenhouse experiments under contrasting levels of N and P. The relationship between nutritional efficiency and tolerance to nutritional stress was estimated by the Spearman ranking correlation between the genotypes for the traits related to N and P use efficiency and phenotypic plasticity indices. The lack of relationship between the traits, in magnitude as well as significance, indicates that these characters are controlled by different gene groups. Consequently, simultaneous …

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Accepts: An Alliance For Cooperative Course Sharing In The Plant Sciences, Michael R. Evans, Richard Harkess, Jeff Kuehny, Janet Cole Jan 2011

Accepts: An Alliance For Cooperative Course Sharing In The Plant Sciences, Michael R. Evans, Richard Harkess, Jeff Kuehny, Janet Cole

Faculty Publications

No abstract provided.

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Evaluation Of Dry Matter, Protein, Starch, Sucrose, Β-Carotene, Iron, Zinc, Calcium, And Magnesium In East African Sweetpotato [Ipomoea Batatas (L.) Lam] Germplasm, Silver Tumwegamire, Regina Kapinga, Patrick R. Rubaihayo, Don R. Labonte, Wolfgang J. Grüneberg, Gabriela Burgos, Thomas Zum Felde, Rosemary Carpio, Elke Pawelzik, Robert O.M. Mwanga Jan 2011

Evaluation Of Dry Matter, Protein, Starch, Sucrose, Β-Carotene, Iron, Zinc, Calcium, And Magnesium In East African Sweetpotato [Ipomoea Batatas (L.) Lam] Germplasm, Silver Tumwegamire, Regina Kapinga, Patrick R. Rubaihayo, Don R. Labonte, Wolfgang J. Grüneberg, Gabriela Burgos, Thomas Zum Felde, Rosemary Carpio, Elke Pawelzik, Robert O.M. Mwanga

Faculty Publications

The present study evaluated selected East African (EA) sweetpotato varieties for storage root dry matter and nutrient content and obtained information on the potential contributions of the varieties to alleviate vitamin A and mineral deficiencies. Roots obtained from 89 farmer (white- and orange-fleshed) varieties and one introduced variety ('Resisto') were analyzed for storage root quality using near-infrared reflectance spectroscopy technology. Location differences were only significant for starch content. The σ2G variance was significant (P < 0.01) for all the traits except sucrose content. Overall, the farmer varieties had higher dry matter, higher starch, and lower sucrose contents than the control clone, 'Resisto'. It is these qualities that make sweetpotato attractive as a starchy staple in EA. A low population's mean β-carotene content (19.0 ppm)was observed.However, deep orange-fleshed farmer varieties, 'Carrot_C', 'Ejumula', 'Carrot Dar', 'Mayai', and 'Zambezi', had β-carotene content that can meet 350% or greater of recommended daily allowance (RDA) with 250-g serving to a 5- to 8-year-old child. More but light orange-fleshed farmer varieties 'K-118', 'K-134', 'K-46', 'KMI61', 'MLE162 Nakahi', 'PAL161', 'Sowola6', 'Sponge', 'SRT34 Abuket2', 'SRT35 Anyumel', 'SRT52', and 'Sudan' can provide 50% to 90% RDA of pro-vitamin A for the child. The root minerals' content was generally low except for magnesium whose content can meet 50% or greater RDA in many farmer varieties. However, in areas with high sweetpotato consumption, varieties 'Carrot_C', 'Carrot Dar', 'KRE nylon', 'MLE163 Kyebandula', and 'SRT49 Sanyuzameza' can make good intakes of iron, zinc, calcium, and magnesium. In conclusion, some EA farmer varieties can contribute greatly to alleviation of vitamin A deficiency and substantial mineral intakes.

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Controlled-Release Fertilizer Type And Rate Affect Landscape Establishment Of Seven Herbaceous Perennials, Yan Chen, Regina P. Bracy, Allen D. Owings, Joey P. Quebedeaux Jan 2011

Controlled-Release Fertilizer Type And Rate Affect Landscape Establishment Of Seven Herbaceous Perennials, Yan Chen, Regina P. Bracy, Allen D. Owings, Joey P. Quebedeaux

Faculty Publications

Use of controlled-release fertilizers (CRF) has been recommended to the landscape service industry as a best management practice for establishing landscape plants. However, application practices vary considerably among professionals and recommendations are lacking for the appropriate type (tablet vs. granular), application rate, and timing of CRF to establish herbaceous perennials. In this study, cigar plant (Cuphea ignea), daylily (Hemerocallis 'Stella de Oro'), gaura (Gaura lindheimeri 'Siskiyou Pink'), lantana (Lantana camara 'New Gold'), mexican heather (Cuphea hyssopifolia), purple coneflower (Echinacea purpurea), and rudbeckia (Rudbeckia fulgida 'Goldsturm') were fertilized with granular CRF (GF) 15N-3.9P-10K (8 to 9 month) at 0, 1, 2, …

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Influence Of Sand Topdressing On Bermudagrass Thatch Decomposition, Dustin S. Parker Jan 2011

Influence Of Sand Topdressing On Bermudagrass Thatch Decomposition, Dustin S. Parker

LSU Master's Theses

Methods to control thatch layers in mature turfgrasses have relied on sand-topdressing and/or mechanical removal. Mechanical removal of thatch through vertical mowing and aerification is effective but disruptive to playing surfaces compared to sand topdressing. As a result, many turf managers have opted to implement sand-topdressing regiments as their primary method for reducing thatch buildup. This research was conducted to 1) determine the effect of cultivar on thatch decomposition and 2) examine the effect of sand topdressing on thatch microenvironment and decomposition. Sand topdressing treatments consisting of sterilized or non-sterilized sand applied at 0.4 cm 14 d-1 or as a …

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The Reproductive Morphology And Physiological Age-Grading Of Female Cyrtobagous Salviniae, The Salvinia Weevil, Lee Jared Eisenberg Jan 2011

The Reproductive Morphology And Physiological Age-Grading Of Female Cyrtobagous Salviniae, The Salvinia Weevil, Lee Jared Eisenberg

LSU Master's Theses

Over 1000 dissections were performed on field, greenhouse and lab specimens in order to describe the reproductive system of Cyrtobagous salviniae, a biocontrol agent of Salvinia molesta (giant salvinia). The reproductive morphology of C. salviniae was described, the classes of reproductive development were characterized, and oviposition assessed. The reproductive system of C. salviniae consists of two ovaries, each of which is comprised of two membraneous ovarioles. These are each divided into a distal germarium and a proximal vitellarium that is connected to a lateral oviduct. The lateral oviducts unite to form a common oviduct through which eggs must pass for …

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Inhibitory Activity Of Ginger Oil Against Breast Cancer Cells, Namrata Karki Jan 2011

Inhibitory Activity Of Ginger Oil Against Breast Cancer Cells, Namrata Karki

LSU Master's Theses

Breast cancer is the leading cause of cancer related mortality in women. The estimated new cases and death for 2010 in the US for females were 207,090 and 39,840 and for men were 1,970 and 390 respectively. Breast cancer cells contain cancer stem cells (CSCs), which represent less than 5% of the total cancer cell population, but accounts for continuous proliferation and growth. Breast cancer is highly metastatic and can spread to various parts of the body. Signaling through cell surface markers, including CD44/CD24/ALDH1 in breast cancer, pro-survival factors, including Hsp90 and other client proteins, angiogenic biomarkers and telomerase activity …

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In Vitro Inhibitory Activity Of Black Seed Oil And Potassium Chloride Against The Biomarkers Of Triple Negative Breast Cancer, Tamaratina Jombai Jan 2011

In Vitro Inhibitory Activity Of Black Seed Oil And Potassium Chloride Against The Biomarkers Of Triple Negative Breast Cancer, Tamaratina Jombai

LSU Master's Theses

Breast cancer is the leading cause of death among women and is highly heterogeneous in nature. One very aggressive subtype of this disease is Triple Negative Breast Cancer. Triple Negative Breast Cancer (TNBC), is a very aggressive disease characterized by the lack of expression of estrogen receptors (ER), progesterone receptors (PR) and human epidermal growth factor receptor-2 (HER-2). TNBC patients account for approximately 15% of total breast cancer patients. This breast cancer subtype is characterized by high mortality rate, and is typically associated with poor prognosis. Current clinical methods have proven to have low success rates against TNBC, it is …

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A Cafeteria-Based Tasting Program Improved Elementary School Children's Fruit Preferences And Self-Efficacy To Consume Fruits And Vegetables, Wei-Ping Wong Jan 2011

A Cafeteria-Based Tasting Program Improved Elementary School Children's Fruit Preferences And Self-Efficacy To Consume Fruits And Vegetables, Wei-Ping Wong

LSU Master's Theses

This quasi-experimental study examined the impact of a fruit and vegetable (FV) tasting program on third and fifth grade children’s preferences and psychosocial factors associated with FV intake. Four public schools in southeastern Louisiana participated. Two schools served as the intervention group where children were given a taste of four fruits or four vegetables on a rotating schedule for eight weeks followed by two weeks of tasting four months post- intervention (follow-up). Two control schools did not participate in tasting but received brightly colored FV posters which were posted in the cafeteria each week. A questionnaire administered at baseline, post-intervention, …

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Development And Permeability Of Equine Blastocysts, Brittany Reshel Scott Jan 2011

Development And Permeability Of Equine Blastocysts, Brittany Reshel Scott

LSU Master's Theses

Equine embryo cryopreservation is unsuccessful in larger, more easily collected, day-7 embryos. It is imperative that methods to successfully cryopreserve large equine embryos or develop reliable methods to determine embryo size before collection. Therefore the objectives for this study were to quantify the amount of tritiated glycerol that would permeate various sizes of equine embryos and to determine if circulating progesterone concentration was correlated with in utero embryo size. Mean embryo diameter (± SEM) across treatments (1.4M and 3.4M tritiated glycerol) was 696.5µm ± 108.6µm and 925.9 µm ± 214.1µm, respectively and were not different (P=0.44). The percent permeation for …

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Sources Of Self-Efficacy In Distance Runners, Ashley Ann Samson Jan 2011

Sources Of Self-Efficacy In Distance Runners, Ashley Ann Samson

LSU Doctoral Dissertations

Self-efficacy theory (Bandura, 1997) asserts that people will be more likely to engage in behaviors that they believe they can successfully perform and avoid behaviors in which they feel that they will be unsuccessful. Researchers have concluded that individuals with high levels of self-efficacy are more likely to pursue challenging goals, cope with pain, and persevere through setbacks, while those with low self-efficacy avoid challenges and tend to give up when confronted with obstacles (Llewellyn, Sanchez, Asghar, & Jones, 2008). Endurance sport, particularly distance running, is a domain in which being able to cope with pain and persevere through setbacks …

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Caregiver Attitude, As Expressed Verbally In A Group Setting, And Its Association With Children's Attachment Security, Erin Wallace Lovett Jan 2011

Caregiver Attitude, As Expressed Verbally In A Group Setting, And Its Association With Children's Attachment Security, Erin Wallace Lovett

LSU Master's Theses

Abstract The purpose of this study was to explore whether or not mothers’ attitudes, as expressed verbally in a group setting, were associated with the attachment style of the child and the insightfulness of the mother. The Circle of Security (CoS) was used as a 27 week group intervention for mothers who had become clients of a child welfare agency. Pre- and post test ratings were obtained for children’s attachment security and mothers’ insightful understanding of their children, using the Strange Situation Procedure (SSP) and the Insightfulness Assessment (IA), respectively. This study created scales for both Warmth/Empathy and Concern/Worry to …

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The Effects Of Reiki Treatment On Mental Health Professionals Who Are At Risk For Secondary Traumatic Stress, Martha P. Novoa Jan 2011

The Effects Of Reiki Treatment On Mental Health Professionals Who Are At Risk For Secondary Traumatic Stress, Martha P. Novoa

LSU Doctoral Dissertations

The purpose of this cross-sectional experimental study was to examine the effects of Reiki on risk level for secondary traumatic stress (STS) among mental health professionals, such as, social workers and licensed professional counselor (LPCs). The sample (N=67) was mostly composed of master social work students (MSW) (61%) from the School of Social Work at Louisiana State University (LSU), professionals social workers (34%), and LPCs (5%). Study participants were randomly assigned to one of three treatment groups: Reiki, placebo or control group. Dependent variables measured at pretest and posttest were: risk level for STS, anxiety, depression, somatic symptoms, anger and …

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Production And Processing Of A Functional Yogurt Fortified With Microencapsulated Omega-3 And Vitamin E, Jose Daniel Estrada Andino Jan 2011

Production And Processing Of A Functional Yogurt Fortified With Microencapsulated Omega-3 And Vitamin E, Jose Daniel Estrada Andino

LSU Master's Theses

Market and nutritional values of fermented milks can be enhanced by adding microencapsulated polyunsaturated fish oil and vitamin E. Polyunsaturated fatty acids (PUFAs) lower the risk of heart disease and vitamin E is an important lipophilic antioxidant that protects cell membranes from oxidation. This study aimed to develop functional yogurts YMSO and YMMO fortified with á-tocopherol and microencapsulated salmon oil (MSO) or microencapsulated menhaden oil (MMO), respectively and to evaluate their physicochemical properties during 1-mo of storage. Stable emulsions were prepared with 7% red salmon oil (SO) or menhaden oil (MO), 22% arabic gum, 11% maltodextrin, 0.83% á-tocopherol and 59.17% …

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Amino Acid-Supplemented Diets And Amino Acid Requirements In Corn And Soybean Meal Diets For Broilers And Pigs, April Marie Waguespack Jan 2011

Amino Acid-Supplemented Diets And Amino Acid Requirements In Corn And Soybean Meal Diets For Broilers And Pigs, April Marie Waguespack

LSU Doctoral Dissertations

The objectives of this research were to: 1) evaluate the role of Gly in low CP, AA supplemented diets for broilers, 2) determine subsequent effects of supplementing Gly in broiler diets, and 3) determine the Val and Ile requirement in an AA supplemented, C-SBM diet for 20- to 45-kg pigs. Three experiments were conducted to evaluate supplementation of Gly, creatine, GAA, and fishmeal in C-SBM diets on growth performance of broiler chicks and to determine if Gly, creatine, or GAA could be added to a C-SBM diet in place of fishmeal to produce similar growth performance. The results from these …

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Development And Application Of Serogroup-Independent And Serogroup-Specific Loop-Mediated Isothermal Amplification Assays For Detecting Shiga Toxin-Producing Escherichia Coli, Fei Wang Jan 2011

Development And Application Of Serogroup-Independent And Serogroup-Specific Loop-Mediated Isothermal Amplification Assays For Detecting Shiga Toxin-Producing Escherichia Coli, Fei Wang

LSU Doctoral Dissertations

Shiga toxin-producing Escherichia coli (STEC), encompassing E. coli O157:H7 and non-O157 STEC, is a significant cause of foodborne illnesses and deaths in the United States and worldwide. Shiga toxins (encoded by stx) and intimin (encoded by eae) are important virulence factors for STEC strains causing infection. Although E. coli O157:H7 remains to be the single most common STEC causing disease, the clinical importance of non-O157 STEC is on the rise worldwide. And six major serogroups (O26, O45, O103, O111, O121, and O145) accounted for over 70% of non-O157 STEC infections in the United States. Loop-mediated isothermal amplification (LAMP) is a …

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Pharmacological And Non-Pharmacological Approaches To Prevent Hypertension-Induced Renal Disease In The Spontaneously Hypertensive Rate, Carrie Marie Elks Jan 2011

Pharmacological And Non-Pharmacological Approaches To Prevent Hypertension-Induced Renal Disease In The Spontaneously Hypertensive Rate, Carrie Marie Elks

LSU Doctoral Dissertations

Hypertension affects 50 million Americans and remains the second leading cause of renal failure in the United States. Current pharmacological and non-pharmacological approaches to treat hypertension have proven effective, but the complexities of the disease and its renal effects warrant the need for new treatments. The hypothesis of this dissertation was that pharmacological or non-pharmacological approaches to reducing inflammation and oxidative stress would prevent hypertension-induced renal injury in the spontaneously hypertensive rat (SHR). In the first study, we blocked the inflammatory transcription factor, nuclear factor-kappa B (NF-ĸB), with pyrrolidine dithiocarbamate in the SHR kidney. In treated SHR, blood pressure decreased, …

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Celiac Disease: Increasing Awareness For A Better Life, Sheetal Malini Verma-Bueche Jan 2011

Celiac Disease: Increasing Awareness For A Better Life, Sheetal Malini Verma-Bueche

LSU Doctoral Dissertations

The purpose of this study was to determine the awareness and knowledge of Celiac Disease/Gluten Intolerance (CD/GI), among clients of a medical facility in the southern portion of the United States. A researcher-designed awareness/knowledge instrument was used to study a random sample of clients of a medical facility. Data were collected from 404 clients at the medical facility. Data collected included whether or not participants were aware of the disease, a 30-item knowledge instrument, and their demographic characteristics. Exploratory factor analysis revealed four identifiable subscales in the knowledge instrument: Symptomology, Diagnosis, Treatment, and Interaction with Other Conditions and Overall Knowledge …

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Optimization Of Adult Multipotent Stromal Cell-Bioscaffold Interactions For Tissue Regeneration With Bioreactors, Lin Xie Jan 2011

Optimization Of Adult Multipotent Stromal Cell-Bioscaffold Interactions For Tissue Regeneration With Bioreactors, Lin Xie

LSU Doctoral Dissertations

Adult multipotent stromal cells (MSCs) in combination with biocompatible scaffolds may augment well-established medical and surgical techniques. Pre-implantation cell loading and viability on scaffold carriers followed by in vitro differentiation and extracellular matrix (ECM) formation contribute to the efficacy of in vivo tissue formation. Given the specificity of the parameters for each cell-scaffold construct, it is vital to assess the relative potential of various combinations to select the best option for various clinical needs. High demand for equine and human bone regeneration especially non-union fracture repair is still largely unaddressed. Therefore osteogenesis potential of both equine and human MSCs engrafted …

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Purification Of Fish Oils And Production Of Protein Powders With Epa And Dha Enriched Fish Oils, Huaixia Yin Jan 2011

Purification Of Fish Oils And Production Of Protein Powders With Epa And Dha Enriched Fish Oils, Huaixia Yin

LSU Doctoral Dissertations

Eicosapentaenoic (EPA) and docosahexaenoic (DHA) in marine oils are known to provide health benefits. However, marine oils are accompanied by saturated fatty acids. By enriching fish oils with EPA and DHA the beneficial effect of fish oils can be increased while limiting the detrimental effect of the saturated fatty acids. Fish oils need to be purified before consumption. A number of methods have been used for extracting and purifying EPA and DHA enriched fish oils; however, thermal degradation and oxidation of polyunsaturated fatty acids (PUFAs) often occurs as a result of exposure to high temperatures, solvents and adverse conditions during …

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A Cohort Study Of A History Of Gestational Diabetes Mellitus And The Risk Of Incident Type 2 Diabetes In Louisiana Women, Yujie Wang Jan 2011

A Cohort Study Of A History Of Gestational Diabetes Mellitus And The Risk Of Incident Type 2 Diabetes In Louisiana Women, Yujie Wang

LSU Master's Theses

Gestational diabetes mellitus (GDM) is one of the most common pregnancy complications. It has been shown that a history of GDM is associated with an increased risk of incident type 2 diabetes in women. In this project, we aim to investigate 1) the trend of GDM incidence in Louisiana State University Health Care Services Division (LSUHCSD) hospital system during 1997 to 2009; 2) the race-specific association between a history of GDM and the risk of incident type 2 diabetes and how the risk changes over years after the index pregnancy. We conducted a retrospective study among women aged 13-50 years. …

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Influence Of Low Sonication Intensities At Different Temperatures On Acid Tolerance, Bile Tolerance, Protease Activity And Growth Of Yogurt Culture Bacteria Lactobacillus Delbrueckii Ssp. Bulgaricus And Streptococcus Salivarius Ssp. Thermophilus, Marvin L. Moncada Reyes Jan 2011

Influence Of Low Sonication Intensities At Different Temperatures On Acid Tolerance, Bile Tolerance, Protease Activity And Growth Of Yogurt Culture Bacteria Lactobacillus Delbrueckii Ssp. Bulgaricus And Streptococcus Salivarius Ssp. Thermophilus, Marvin L. Moncada Reyes

LSU Master's Theses

Streptococcus salivarius ssp. thermophilus and Lactobacillus delbrueckii ssp. bulgaricus are dairy cultures widely used in the dairy industry. Low sonication intensity condition is a non-destructive technique that uses sound waves to cause cavitation in aqueous solutions and may improve the permeability of membranes, speed up the transfer of substrates and promote cellular growth and propagation. The objective of this study was to determine the effect of low sonication intensities at different temperatures on acid tolerance, bile tolerance, protease activity and growth of the two dairy cultures. The cultures were freshly thawed and suspended in 0.1% peptone water and 18 ml …

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Characterization Of Spiroplasma Mirum And Its Role In Transmissible Spongiform Encephalopathies, Hilari Maree French Jan 2011

Characterization Of Spiroplasma Mirum And Its Role In Transmissible Spongiform Encephalopathies, Hilari Maree French

LSU Doctoral Dissertations

There are many contradictory reports in the literature involving the culture of Spiroplasma mirum, its resistance to disinfectants and antibiotics, and its potential role in Transmissible Spongiform Encephalopathies (TSEs). These contradictions led to an interest in a possible link between spiroplasma and TSEs and the development of a research plan to elucidate this connection. It was hypothesized that Spiroplasma was associated with a neurodegenerative disease such as TSE. In this work we further characterized S. mirum laboratory strains and continued to evaluate the possible correlations they have with TSE infections and the prion. To optimize recovery of S. mirum from …

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Comorbid Psychopathology In Children With Autism Spectrum Disorders - Cut-Off Scores For The Autism Specturm Disorders-Comorbidity For Children (Asd-Cc), Ryan Thomas Thorson Jan 2011

Comorbid Psychopathology In Children With Autism Spectrum Disorders - Cut-Off Scores For The Autism Specturm Disorders-Comorbidity For Children (Asd-Cc), Ryan Thomas Thorson

LSU Doctoral Dissertations

Once considered rare, Autism Spectrum Disorders (ASD) are increasingly becoming viewed as common disorders. Prevalence rates of ASD have increased drastically in recent years. Recent studies suggest comorbid psychopathology within ASD to be more common than previously thought. Though these deficits exist, specific instruments to diagnose psychopathology in this population do not yet exist. This highlights the underlying need for instruments to identify psychopathology in individuals with ASD. The aim of this study was to establish cut-off scores for the Autism Spectrum Disorder – Comorbidity for Children, an instrument designed to assess for comorbid psychopathology within individuals with ASD.

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Obesity Treatment Alternatives: Foods To Surgery, Brooke Erwin Bayham Jan 2011

Obesity Treatment Alternatives: Foods To Surgery, Brooke Erwin Bayham

LSU Master's Theses

The purpose of these studies was to explore the roles of dietary strategies and bariatric surgery in obesity treatment. The breakfast study was a randomized, crossover trial used to evaluate the role of egg proteins, and a retrospective chart review was conducted to obtain comparative information about two different bariatric surgeries. The breakfast study included 20 subjects who were randomized to receive an egg breakfast (EB) or a cereal breakfast (CB) matched for energy density and macronutrient composition but different protein quality for one week. Following a washout period, each subject was crossed over to receive the opposite breakfast for …

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A Qualitative Study Of 4-H State And Field Faculty Use Of Social Media To Communicate With Youth, Volunteers, And Stakeholders, Mary Christina Sorenson Jan 2011

A Qualitative Study Of 4-H State And Field Faculty Use Of Social Media To Communicate With Youth, Volunteers, And Stakeholders, Mary Christina Sorenson

LSU Master's Theses

The purpose of this study is to explore the type of social media technology utilized by 4-H field and state faculty to communicate with 4-H members, volunteers, and advisory board members. As youth increase their use of technology for communications it is critical for youth development agents to adapt to new communication methods Qualitative research methods were used to explore this topic. Guiding questions were developed from the empirical literature. Responsive interviewing technique was used to gather data. A purposeful sample was chosen for this study. The sample consisted of field and state 4-H Cooperative Extension Service faculty located in …

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Fragmentation Sensitivity And Its Consequences On Demography And Host-Ectoparasite Dynamics In Amazonian Birds, Erik I. Johnson Jan 2011

Fragmentation Sensitivity And Its Consequences On Demography And Host-Ectoparasite Dynamics In Amazonian Birds, Erik I. Johnson

LSU Doctoral Dissertations

The Amazon rainforest is experiencing rapid deforestation due to ranching, agriculture, and urban development, which often leads to remnant patches serving as refugia for forest organisms. By mist-netting passerines in 11 forest fragments (1-, 10-, and 100-ha patches) and nearby continuous forest at the Biological Dynamics of Forest Fragmentation Project near Manaus, Brazil, I conducted a series of studies to identify mechanisms that drive population changes in fragmented landscapes. First, I examined the age structure of bird populations from six ecological guilds in fragments and continuous forest. Immatures are the dispersing age group in birds, and their relative abundance in …

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