Digital Commons Network^™

Determination Of Critical Y-Leaf Potassium Concentrations Across Reproductive Growth Stages For Direct-Seeded Delay-Flooded Rice, Chandler Edwin Gruener

Graduate Theses and Dissertations

Rice (Oryza sativa L.) grain yield can be limited by potassium (K) deficiency on soils low in exchangeable K. Visually diagnosing K deficiency during early reproductive growth is not easily done and the interpretation of traditional tissue analysis is limited to select growth-stages. Our primary focus was to define continuous critical Y-leaf-K concentrations during reproductive growth for the production of maximal grain yield. A secondary objective was to examine Y-leaf sap-K concentration, measured using a handheld device, as a rapid in-field method of monitoring rice plant K nutrition. The Y-leaf is defined as the uppermost fully extended leaf with a …

Examination Of Language Skills In Children Who Attend Head Start Programs, Madilyn Littlefield

Graduate Theses and Dissertations

Socioeconomic status and poverty can greatly affect child development and have lasting impacts throughout life. Children who are raised in a low socioeconomic status homes may experience limited parent sensitivity, limited parental engagement, and limited access to stimulating materials. These factors may also limit opportunities to experience rich language and literacy experiences which can negatively impact development of emergent literacy skills and later educational growth. To reduce the effects of poverty on school readiness, income-based childcare programs allow families access to affordable early school readiness opportunities that are developmentally appropriate. Head Start programs are designed to facilitate child development, provide …

Techniques To Enhance The Attributes Of Wines Produced From Grapes Grown In Arkansas, Sarah Mayfield

Graduate Theses and Dissertations

Grapevines (Vitis spp.) are one of the most widely-planted horticultural crops, and the United States plays a major role in grape and wine production. Arkansas has a long history of grape and wine production with grapes grown in Arkansas including mostly native species, such as muscadines, and hybrids (crosses of Vitis spp.), such as Chambourcin. In addition, the University of Arkansas System Division of Agriculture (UA System) grape breeding program has cultivars and selections that have shown potential for wine production. The objectives of this research were to: evaluate effects of specific inactivated yeast application to Chambourcin grapevines on attributes …

Effects Of Light, Nutrients, And Salts On Microbial Biofilm Productivity And Detrital Processing In Aquatic Mesocosms, Bethanie Brooke Howard-Parker

Graduate Theses and Dissertations

Anthropogenic activities associated with urbanization, agriculture, and resource extraction continue to increase to support increasing needs of the growing population. These activities increase the amounts of pollutants entering freshwater streams and put aquatic ecosystems at structural and functional risk. Aquatic microbes play an important role in detrital processing in streams as a key linkage in moving carbon from detrital stocks into aquatic food webs. My research investigates the effects of light, nutrients, and salts on detrital microbes and decomposition in freshwaters using a mesocosm approach. In chapter one, I modified a current priming effect (PE) hypothesis model to include light …

Effects Of Lasalocid And Energy Supplementation On Forage Intake, Energy Metabolism, And Performance Of Cattle Grazing Wheat Pasture, Autumn Tayler Pickett

Graduate Theses and Dissertations

Cattle grazing wheat pasture have the potential to gain BW exceptionally well, but excessive nitrogen intake results in increased excretion and increased greenhouse gas (GHG) emissions. Supplemental concentrates with the addition of an ionophore given to ruminants grazing wheat is a potential practice for producers to increase nitrogen efficiency while decreasing GHG emissions. Therefore, the objective of this experiment was to quantify the effects of energy (2.95 kg/d) and lasalocid (200 mg/hd/d) supplementation on nutrient intake, energy metabolism, respiratory gas fluxes, and performance of grazing cattle. Methane emissions were not affected (P = 0.58) by treatment, hence methane intensity (P …

Chefs' Perceptions Of Zero Waste Cooking In Restaurants, Josephine Reardon

Graduate Theses and Dissertations

The purpose of this study is to examine chefs’ perceptions and practices relative to current and potentially future efforts to decrease food waste. Through qualitative inquiry, this research aims to identify food waste reduction practices in Northwest Arkansas restaurants; chef’s perceptions of these practices and zero waste cooking; the impact these practices have on successfully implementing sustainability; and the biggest challenges in reducing food waste in restaurants. The results of this study will assist chefs and restaurant owners by providing guidance on practices easily utilized in restaurants currently.

An interview protocol, with five sections, was conducted with ten chefs at …

Evaluation Of Microbiome On Chicken Necrotic Enteritis And Growth Performance, Mussie Abraha

Graduate Theses and Dissertations

Necrotic enteritis (NE) has re-emerged following restriction of antimicrobial usage and costs $6 billion every year worldwide. The primary objective of the studies was to evaluate prevention and treatment of NE using a microbiota metabolic product, secondary bile acid deoxycholic acid (DCA), in drinking water. Day-old birds were tagged and placed in floor pens. In experiments 1 and 2, the birds were infected with Eimeria maxima (Em) at d 18 and C. perfringens at d 23 and 24 and the birds were euthanized at d 26. In experiment 3, birds were infected with Eimeria at d 20 and C. perfringens …

Elucidating Basis Of Rice Discoloration And Developing Prevention Strategies, Zeinab Mohammadi Shad

Graduate Theses and Dissertations

Economically, discolored rice kernels have less market value, which can seriously impact farm net profit. The reasons for rice discoloration during storage have not been studied extensively and many questions remain. Therefore, the primary goal of this study was to improve understanding of the role and contributions of storage practices on rice quality degradation and discoloration. In this study, three rice cultivars including XL753 (hybrid), Roy J (pureline), and Titan were assessed for changes in quality and microbial kinetics. The rice samples at a high moisture content (MC) of 21% w.b. and a low MC of 16% were stored at …

Comparison Of Dietary And Physical Activity Changes Across Family-Based Maintenance Treatments For Childhood Overweight And Obesity, Jessica Jakubiak

Arts & Sciences Graduate Student Theses and Dissertations

No abstract provided.

Preliminary Incidence And Trends Of Infections With Pathogens Transmitted Commonly Through Food - Foodborne Diseases Active Surveillance Network, 10 U.S. Sites, 2016-2019, Danielle M. Tack, Logan Ray, Patricia M. Griffin, Paul R. Cieslak, John Dunn, Tamara Rissman, Rachel Jervis, Sarah Lathrop, Alison Muse, Monique Duwell, Kirk Smith, Melissa Tobin-D'Angelo, Duc J. Vugia, Joanna Zablotsky Kufel, Beverly J. Wolpert, Robert Tauxe, Daniel C. Payne

Pathology Research and Scholarship

To evaluate progress toward prevention of enteric illnesses, the Foodborne Diseases Active Surveillance Network (FoodNet) of CDC's Emerging Infections Program monitors the incidence of laboratory-diagnosed infections caused by eight pathogens transmitted commonly through food at 10 U.S. sites.* This report summarizes preliminary 2019 data and describes changes in incidence compared with that during 2016-2018. The incidence of enteric infections caused by these eight pathogens reported by FoodNet sites in 2019 continued to increase or remained unchanged, indicating progress in controlling major foodborne pathogens in the United States has stalled. Campylobacter and Salmonella caused the largest proportion of illnesses; trends in …

Levels Of Cyclin B In Thp-1 Cells Incubated In Hibernating And Non-Hibernating Bullfrog Plasma, Lithobates Catesbeianus, Tharuka D. Pathmaperuma

Dissertations and Theses @ UNI

Hibernation is a process that occurs in nature where organisms undergo dormancy for long periods of time in order to improve their survival during extreme environmental conditions. During this time, organisms undergo physiological changes such as reduction in core body temperature and metabolic rate, as well as cells being impeded from going into mitosis. Alvarado et al. (2015) discovered that genomic DNA methylation is dynamic across torpor-arousal bouts during winter hibernation in thirteen lined ground squirrels (Ictidomys tridecemlineatus), indicating that physiological changes during hibernation are the results of more than simply cold temperatures slowing down metabolism and that …

Effects Of A Sport Nutrition Education Intervention On Nutritional Knowledge, Dietary Behaviors, And Self-Efficacy In Ncaa Division I Softball Players, Kylie Wilson

Dissertations and Theses @ UNI

Optimal nutrition is vital in sport. The purpose of this study was to investigate the effects of a sport nutrition education intervention (SNEI) on nutritional knowledge, dietary behaviors, nutritional self-efficacy, body composition, and performance in National Collegiate Athletic Association Division I female softball players, and to measure retention and effects of this knowledge after the SNEI period. Seven participants were assessed using a Dietary Behaviors and Nutritional Knowledge questionnaire, Self-Efficacy questionnaire, BodPod measurement, exit velocity, and weekly intention surveys. Two-way mixed repeated ANOVAs were used to determine the impact of a five-week SNEI on an intervention group as compared to …

Through Their Eyes: Exploring The Relationship Between College Females' Body Perceptions And Recreation Center Messaging, Sydney Leigh Ann Cindrich

Dissertations and Theses @ UNI

The study aimed to investigate the influence that recreation center promotional messaging had on college females’ body perceptions. Body perceptions among young adult females have been linked to mental health (McKay, 2013; Miner-Rubino, Twenge, & Fredrickson, 2002). Female participants 18 to 25 years of age (N = 137, Mage = 20.41) from a mid-sized, Midwestern university completed two separate body perception questionnaires. These questionnaires assessed body appreciation (functionality) and body shame (objectification). Participants were divided into three groups and shown a collage of recreation center messages that were portraying one of three conditions (a) body functionality, (b) self-objectification, or (c) …

Impact Of Storage Temperature On Viability Of Microbial Inoculum For Estimating In Vitro Equine Digestibility, Delaney Brenne O'Donnell

Graduate Theses/Dissertations

This study evaluated the effect of storage temperature of equine fecal material on the viability of microbial inoculum used for in vitro equine digestibility trials. Fecal material was stored at four storage temperatures of 39°C for 15 minutes (control), 22°C for 6h, 3°C for 6h, and -18°C for 24h. Stored fecal material was used to form microbial inoculum for use in an Ankom Daisy II Incubator. Six different forage samples were digested in the Ankom Daisy II Incubator to evaluate interactions between storage condition of microbial inoculum and chemical composition of digested forage samples. After determination of dry matter digestibility …

Molecular Characterization Of Wolbachia And Its Impact On The Microbiome Of Exotic And United States Ticks, Cailyn G. Bobo

Honors Theses

Wolbachia endosymbionts are obligate intracellular bacteria in the phylum α-Proteobacteria. They infect approximately two-thirds of arthropods including insects and nematodes. These bacteria manipulate host reproductive biology through a series of mechanisms that include feminization of male progeny, parthenogenesis, male killing, and cytoplasmic incompatibility. These features make Wolbachia an effective agent of controlling insect populations, as previously reported in different mosquito species. Likewise, the bacteria have also shown promising ability to interfere with the ability of mosquitoes to transmit several viral pathogens. This study was conducted to fill an existing knowledge gap on the prevalence of Wolbachia in different tick species …

The Effects Of Light On The Bacterial Biomass Of Decomposing Leaf Litter In Freshwater, Savannah L. Underwood

Honors Theses

Recent evidence has suggested that the presence of light (and in conjuction, periphytic algae) stimulates the growth and production of bacteria on decaying plant litter. However, the current method of measuring bacterial biomass, flow cytometry, drastically underestimates the bacterial biomass levels associated with litter samples. To determine and correct for this underestimation, the present study determined conversion factors using direct counting methods via epifluorescence microscopy. These conversion factors were then applied to flow cytometry counts for seven different studies. The studies analyzed the effects of light and other covarying factors on the bacterial biomass associated with various samples of leaf …

Labeling Compliance, Species Authentication And Net Weight Identification Of Frozen Fish Fillets Sold In Grocery Stores In Southern California, April Peterson

Food Science (MS) Theses

Proper labeling of seafood is important to prevent economic deception, promote consumer awareness, and prevent exposure of at-risk groups to certain allergens and toxins. The objective of this study was to investigate prepackaged frozen fish sold in Southern California for Country of Origin Labeling (COOL) compliance, species authentication, use of acceptable market names, net weights, and percent glaze. A total of 111 frozen fish fillets from 13 different fish categories were purchased from grocery stores in Southern California. The fish categories targeted for this study were: catfish, cod, flounder, halibut, mahi-mahi orange rough, pollock, salmon, swai, swordfish, tilapia, tuna, and …

Cabbage In The Garden, Dan Drost, Mike Johnson

All Current Publications

No abstract provided.

Investigation Of The Individual Soybean Root Nodule Microbiome, Parris Mica Mayhood

Graduate Theses/Dissertations

Soybean is a valuable crop that establishes a symbiotic association with nitrogen-fixing microorganisms. Previous research suggests members of the genus Bradyrhizobium are the major nitrogen-fixing inhabitants of soybean root nodules. However, results from recent studies identified the presence of other bacteria, so called non-rhizobial endophytes (NREs), inside root nodules. All previous research has pooled nodules of different plants for bacterial community analysis, but this study investigated the presence and relative abundance of rhizobia and NREs within multiple root nodules of a single plant. Three sites were selected on Kendrick Farm in Springfield, MO, where three plants and rhizosphere soil were …

A Feasibility Study On The Implementation Of A Web-Based Intuitive Eating Program In A University Setting, Jaime Gnau

Graduate Theses/Dissertations

This research reports on the feasibility of implementing a web-based intuitive eating (IE) program to employees through a university employee wellness department at Missouri State University (MSU). Barriers and facilitators to program participation were also identified and discussed.

Background: Ten IE principles present an evidence-based strategy for reducing incidence of weight cycling and improving one’s relationship with food and self, and reducing health risks associated with chronic dieting and weight regain. Offering web-based programming reduces barriers to program enrollment but is also associated with high rates of attrition.

Methods: The program was developed utilizing the PRECEED-PROCEDE model with application of …

Alternative Production Practices And The Role Of Consumer Choice: Willingness-To-Pay Analyses, Amanda P. Wecker

Graduate Theses/Dissertations

Production choice is often viewed as driven by the resources and methods known to the producers. However, recent discussions focus on the other factors leading to production choice such as consumer preference, measured by factors such as willingness to pay (Tait, Saunders, Guenther, and Rutherford, 2016). This study evaluates the role of diet preference and age in driving a consumer’s willingness to pay for food produced with specific method. The data analyzed are from the 2016 U.S. Lifestyles of Health and Sustainability (LOHAS) Consumer survey. A total of 1042 individuals were asked whether they were willing to pay 10% more …

Optimal Calving Time For Beef Cows In Southwest Missouri, Briana Rose Verploeg

Graduate Theses/Dissertations

The purpose of this study is to determine if a optimal time of year exists for beef producers to have cows give birth in southwest Missouri for maximal net returns from calf sales and increased cow reproductive performance. To make this determination, data were collected which included year-round forage nutritive value, calf pre-weaning growth, cow energy efficiency and reproductive performance, and income and cost values. Cow and calf field data were gathered for the 2014-2018 production years at Missouri State University’s Leo Journagan Ranch. Monthly forage samples were collected from study cow pastures from 2016 through 2018. Calf, cull cow, …

Crop Yield And Democracy, James B. Ang, Per G. Fredriksson, Satyendra Kumar Gupta

Faculty and Staff Scholarship

How does the historical legacy of agriculture affect democratic traditions in contemporary societies? This paper provides empirical evidence that inherent crop yield and democracy exhibit an inverted U-shaped relationship. This finding is supported by cross-country data from up to 147 countries, 186 pre-colonial societies, and the U.S. states. The relationship thus exhibits a highly persistent pattern. Crop yield is measured by kilocalories per hectare per year under rain-fed conditions, which has the advantage of being highly exogenous. The hump-shaped relationship holds up to a battery of robustness tests.

#Crcfree: Using Social Media To Reduce Colorectal Cancer Risk In Rural Adults, Kaitlin Voigts Key, Adebola Adegboyega, Heather Bush, Mollie Aleshire, Omar A. Contreras, Jennifer Hatcher

Faculty and Staff Scholarship

Objectives: In this study, we pilot-tested #CRCFree, a Facebook-based intervention aimed at reducing colorectal cancer (CRC) risk in rural Appalachian adults at risk for CRC. Methods: Participants were 56 rural Appalachian adults aged ≥ 50 years. Daily #CRCFree Facebook posts addressed diet, physical activity, and CRC screening. Participants’ sociodemographics, diet, body mass index, physical activity, and CRC screening status were measured pre- and post- intervention. The Healthy Eating Index (HEI) and the Dietary Inflammatory Index (DII) assessed dietary patterns. Facebook engagement was measured throughout the intervention. A post-intervention focus group evaluated intervention acceptability. Results: Participants were Caucasian, aged 58 ± …

Neurocognitive Impairment In Type 2 Diabetes: Evidence For Shared Genetic Aetiology, Josephine Mollon, Joanne E. Curran, Samuel R. Mathias, Emma E. M. Knowles, Phoeve Carlisle, Peter T. Fox, Rene L. Olvera, Harald Hh Goring, Amanda Rodrigue, Laura Almasy, Ravindranath Duggirala, John Blangero, David C. Glahn

School of Medicine Publications

Aims/hypothesis: Type 2 diabetes is associated with cognitive impairments, but it is unclear whether common genetic factors influence both type 2 diabetes risk and cognition.

Methods: Using data from 1892 Mexican-American individuals from extended pedigrees, including 402 with type 2 diabetes, we examined possible pleiotropy between type 2 diabetes and cognitive functioning, as measured by a comprehensive neuropsychological test battery.

Results: Negative phenotypic correlations (ρp) were observed between type 2 diabetes and measures of attention (Continuous Performance Test [CPT d']: ρp = -0.143, p = 0.001), verbal memory (California Verbal Learning Test [CVLT] recall: ρp = -0.111, p = 0.004) …

Evaluating The Effects Of A Brief Acceptance And Commitment Therapy Intervention On Environmentally Sustainable Behavior, Anne Sheerin

Theses

The purpose of the present study was to use the principles of acceptance and commitment therapy (ACT) to increase environmentally sustainable behavior among seven college-aged students. Acceptance and Commitment Therapy involves increasing mindfulness and psychological flexibility. All participants filled out a daily survey that ranked how much they had participated in environmentally sustainable behavior or if they had the opportunity to participate in it at all. Four participants then received three individual, brief ACT sessions with the researcher and three of these participants showed an average of a 20% increase overall in self-reported sustainable behaviors after the brief intervention in …

An Instrumental Case Study: Growth Mindset Instructional Best Practices For Learning Disabled Students, Brenda L. Cornell

Electronic Theses and Dissertations

The problem that drove this study was that students who struggle in school, especially those with a non-intelligence-based learning disability, suffer from a fixed mindset after years of feelings of failure in school. This mindset causes them to develop maladaptive approaches to learning that inhibit success. The purpose of this study was to describe the best practices of reading teachers who have a reputation for high student achievement and who adhere to a growth mindset in an effort to build a growth mindset culture with their students. This qualitative instrumental case study was conducted through interviews of eleven reading teachers/specialists …

Attrition In A Holistic Job Skills Training Program: A Qualitative Study, Jeaniece Silas

Electronic Theses and Dissertations

Today thousands of individuals and families are unemployed or underemployed and are seeking ways to combat poverty and become employed. One way that individuals seek to gain employment is by attending job skills training and adult education programs. However, there are barriers that hinder those individuals from successfully completing the programs. The purpose of this study is to explore the experience of applicants of a nonprofit job skills training program called FaithWorks and explore the reasons why applicants were not able to continue and, or complete the program. This study was conducted, through qualitative interviewing of four participants (N=4) utilizing …

The Romantic Cyclic Sonata As A Hidden Counterculture : Rethinking The Subdominant Through A Structural-Hermeneutic Approach, Marcelo Gabriel Rebuffi

Theses and Dissertations

No abstract provided.

Comparison Of Three Analytical Techniques For General Characterisation Of Selected Algae And Cyanobacteria, Mohamed Iqbal Suhaina Nashath

Student Works (2020-2029)

Algae and cyanobacteria maintain the oxygenation of earth, and are utilised as biofuels, biofertilizers and nutrition feed. The characterisation of algae and cyanobacteria through conventional methods require technical expertise, laborious sample preparation, and moderately expensive instruments and reagents. Hence, in this study, selected bioanalytical techniques with minimal sample preparation were incorporated, to simplify the characterisation of algae and cyanobacteria. The objectives of this research were to study the phylogenetic relationship of the selected algae and cyanobacteria via the 23S plastid ribosomal ribonucleic acid (rRNA) and 18S rRNA biomarkers; to validate the presence of the microcystin synthetase (mcy) gene cluster encoding …