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Articles 1621 - 1650 of 3028
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Combining Translational And Functional Genomic Approaches To Augment Management Strategies Of Plant Parasitic Nematodes, Sandeep Sharma Khatiwada
Combining Translational And Functional Genomic Approaches To Augment Management Strategies Of Plant Parasitic Nematodes, Sandeep Sharma Khatiwada
Graduate Theses and Dissertations
Plant-parasitic nematodes pose a major threat to crop yield worldwide. Discontinued use of harmful chemicals has prompted the search for alternative management strategies that are effective yet environmentally friendly. Harpin proteins, which are derived from bacteria, and nematophagous fungi, natural predators of nematodes, are ideal for biological control of plant-parasitic nematodes. However, research on the efficacy of harpin proteins on nematodes, and biology of nematophagous fungi is minimal. Previously, a taxonomically uncharacterized nematophagous fungus designated ARF18 effectively suppressed nematode populations in soil. The overarching goal of this dissertation is to utilize applied and functional genomic approaches to augment management of …
Phylogeny And Evolutionary Genomics Of Non-Photosynthetic Diatoms, Anastasiia Onyshchenko
Phylogeny And Evolutionary Genomics Of Non-Photosynthetic Diatoms, Anastasiia Onyshchenko
Graduate Theses and Dissertations
Diatoms are prolific photosynthesizers responsible for some 20% of global primary production. In real terms, the oxygen in one of every five breaths traces back to photosynthesis by marine diatoms. Among the tens of thousands of diatom species, a small handful of colorless diatom species in the genus Nitzschia have lost photosynthesis altogether and rely exclusively on extracellular organic carbon for growth. I used DNA sequence data to reconstruct the phylogeny of this group, and found that nonphotosynthetic diatoms are monophyletic, indicating that photosynthesis was lost just one time over the course of some 200 million years of diatom evolution. …
A Study Into The Relationship Between Nutrition And Income In A College Setting, Alyssa Hicks
A Study Into The Relationship Between Nutrition And Income In A College Setting, Alyssa Hicks
Economics Undergraduate Honors Theses
Many health related issues in the United States are linked to Americans’ poor diet choices. College students, a subset of that population, establish important trends in their diet habits that they will maintain over their four years in college and beyond. Although previous literature has found income to be a determinant of diet, this paper does not find income to be a significant predictor of student nutrition. One potential explanation is that college provides a unique environment and circumstance. Yet, additional income suggests it could be important for students who suffer from a lack of funds—increasing their income brings about …
Consumers’ Willingness To Pay For Hydroponic Lettuce, Daniel Gilmour
Consumers’ Willingness To Pay For Hydroponic Lettuce, Daniel Gilmour
Graduate Theses and Dissertations
With continued advances in hydroponic plant production technology, an increasing number of farms have begun using hydroponic techniques to grow leaf lettuce and other food crops in a controlled environment. Recent controversy about the ongoing inclusion of hydroponics in the USDA organic program has highlighted uncertainty about marketing for hydroponic crops. In November 2017, the National Organic Standards Board voted not to recommend that hydroponic farms be banned from applying for organic certification. Since then, continued controversy has led a group of organic producers to start an additional independent certification program that would exclude hydroponic crops. While hydroponic production may …
A Comparison Of Craniofacial Asymmetry In Gorilla Gorilla Gorilla And Pan Troglodytes Troglodytes, Ashly Noel Romero
A Comparison Of Craniofacial Asymmetry In Gorilla Gorilla Gorilla And Pan Troglodytes Troglodytes, Ashly Noel Romero
Graduate Theses and Dissertations
Fluctuating asymmetry (FA) – random deviations from bilateral symmetry in an organism’s paired features – is a good candidate for investigating developmental stability. This easily accessible measurement can be used to understand the relationship between stress and development across organisms, and growth rate plays a vital role in developmental processes. Few studies have investigated craniofacial FA in non-human primates, and those that have suggest that levels of FA are higher in slower growing species. This study examines craniofacial FA in two primate species (Pan troglodytes troglodytes and Gorilla gorilla gorilla; n=81) to elucidate the effect of growth rate on FA …
Performance Assessment Of Solid State Anaerobic Digestion Of Poultry Litter, Mason Puckett
Performance Assessment Of Solid State Anaerobic Digestion Of Poultry Litter, Mason Puckett
Biological and Agricultural Engineering Undergraduate Honors Theses
The disposal of poultry litter can exert an economic and environmental burden to the agriculture community. As a result, it is desirable to reduce the amount of waste and recover resources from the waste. This study focuses on the construction and preliminary testing of a laboratory scale (20 L) solid state anaerobic digester (AD) fed with dry poultry litter. Glucose was added in addition to the poultry litter to achieve the appropriate C:N ratio to support the growth of anaerobic microorganisms. The AD was first fed every 4 days at 4 g VS/L/feeding for 24 days, rested (no feeding) for …
Polymorphisms Of Bovine Hsp90 And Their Implications In Beef Cattle Productivity, Glynn G. Smith
Polymorphisms Of Bovine Hsp90 And Their Implications In Beef Cattle Productivity, Glynn G. Smith
Animal Science Undergraduate Honors Theses
Production of beef cattle represents a $60 billion industry in the United States (USDA, 2015). The American beef cattle industry loses an estimated $370 million annually due to heat stress (St-Pierre, 2003). As of 2003, this was equal to nearly 99 million pounds of beef lost (USDA, 2015). The average American consumed roughly 65 pounds of beef in 2003; this means that the 99 million pounds of beef lost to heat stress would have been enough to feed approximately 1.5 million Americans for an entire year (Barclay, 2012).
An Impact Evaluation Of The Government Grant Programs And Input Efficiency Use In The Production Of Greenhouse Tomatoes And Peppers In Kosovo, Blend Frangu
Graduate Theses and Dissertations
Determinants of greenhouse tomato and pepper production input efficiency affect a farmer’s decision to contribute to the vegetable sector in Kosovo. This research investigates the non-optimal use of inputs in the production of greenhouse tomatoes and peppers. Two studies were conducted to first measure input efficiency use and then to quantify the impact of the Ministry of Agriculture, Forestry and Rural Development (MAFRD) grant programs in the production of both crops. The first study applied data envelopment analysis (DEA), and linear and logistic regression to assess factors that influence efficiency in production. The second study used propensity score matching with …
Seeking Representations Of Afrocentric Beauty: A Comparative Content Analysis Of Advertisements In Essence Magazine, Roy Phillips Jr.
Seeking Representations Of Afrocentric Beauty: A Comparative Content Analysis Of Advertisements In Essence Magazine, Roy Phillips Jr.
Journalism Undergraduate Honors Theses
This comparative content analysis will investigate how African American women are depicted in Essence magazine advertisements and seeks to answer the research question: Are the characteristics of advertisements in Essence magazines significantly different when under complete corporate ownership compared to being under primarily African American ownership? The specific goal is to examine the extent to which Afrocentric or Eurocentric depictions are being reinforced, if at all, and to observe if depictions of African American women are shifting or are immobile. To do this, the study will compare advertisements in Essence magazines in 2001, when the magazine was 51 percent Black-owned, …
The Effect Of Napping On Sleep Quality And Quantity In Healthy And Concussed Collegiate Athletes, Katie Stephenson-Brown
The Effect Of Napping On Sleep Quality And Quantity In Healthy And Concussed Collegiate Athletes, Katie Stephenson-Brown
Graduate Theses and Dissertations
Clinicians are increasingly prescribing a regulated sleep schedule to athletes post injury; however, baseline sleep habits of collegiate athletes are unknown. Moreover, the connection between napping and sleep quality and quantity has not been studied in collegiate athletes. Therefore, the purpose of this study is to investigate napping behaviors and their effects on sleep quantity and quality in concussed and non-concussed collegiate athletes. In a sample of 233 non-concussed collegiate athletes, 74% (172/233) of participants reported napping. Napping was not significantly associated with sleep quantity (χ 2 (2) = .23, p = .64) or quality (χ 2 (1) = .42, …
Effects Of Hydration And Mineralization On The Mechanical Behavior Of Collagen Fibrils, Marco Fielder
Effects Of Hydration And Mineralization On The Mechanical Behavior Of Collagen Fibrils, Marco Fielder
Graduate Theses and Dissertations
Bone is a composite biomaterial with a structural load-bearing function. Understanding the biomechanics of bone is important for characterizing factors such as age, trauma, or disease, and in the development of scaffolds for tissue engineering and bioinspired materials. At the nanoscale, bone is primarily composed of collagen protein, apatite crystals, and water. Though several studies have characterized nanoscale bone mechanics as the mineral content changes, the effect of water, mineral, and carbon nanotube (CNT) content and distribution in fibril gap and overlap regions is unexplored. This study used molecular dynamics to investigate the change in collagen fibril deformation mechanisms as …
Pre-Season Vitamin D And Iron Levels As A Predictor Of Musculoskeletal Injury In Division I Athletes, Mariellen Katherine Veach
Pre-Season Vitamin D And Iron Levels As A Predictor Of Musculoskeletal Injury In Division I Athletes, Mariellen Katherine Veach
Graduate Theses and Dissertations
Context: Pre-season testing that includes the analysis of micronutrient serum levels in the blood has become a routine part of pre-participation examinations in collegiate football. Objective: Assess the predictability of vitamin D and iron serum levels as indicators of future injury during a subsequent competitive season for lower extremity sprains, strains, and fractures. Additionally, determine the effectiveness of vitamin D supplementation on increasing serum 25(OH)D levels and preventing injury. Design: Cohort Study. Setting: National Collegiate Athletic Association Division I football program. Participants: Football athletes (n=349) who underwent pre-participation examinations and participated in at least one of three competitive football seasons. …
Mitochondrial Mrna Translation Is Required For Maintenance Of Oxidative Capacity, David Lee
Mitochondrial Mrna Translation Is Required For Maintenance Of Oxidative Capacity, David Lee
Graduate Theses and Dissertations
Oxidative metabolism is required to produce adequate energy to sustain human life. A primary example of deteriorating oxidative capacity is seen in the cardiac musculature during chronic heart failure. This suggests that by improving oxidative potential, chronic heart disease could be mitigated and one approach to accomplish this may be through targeting the mt-mRNA translation system. Purpose: This investigation’s purpose was to characterize disruptions in mt-mRNA translation machinery in multiple forms of cardiomyopathy and to determine if mitochondrial mRNA translation initiation factor (mtIF2) is necessary to maintain oxidative capacity in cardiomyocytes. Methods Using a combination of animal and cell culture …
An Evaluation Of Breeding, Agronomic, And Processing Methodologies Of Vegetable Soybean (Edamame) To Increase Domestic Production In The United States Market, David Octor Moseley
An Evaluation Of Breeding, Agronomic, And Processing Methodologies Of Vegetable Soybean (Edamame) To Increase Domestic Production In The United States Market, David Octor Moseley
Graduate Theses and Dissertations
Edamame is a food-grade soybean (Glycine max (L.) Merrill) that is either harvested immature (R6 stage) or after plant maturity (R8 stage). At R6, the premium product will have crescent- shaped large green pods and gray pubescence. At R8, the seed will either have stayed green or will have turned yellow, black, or brown. Edamame is a healthy snack with a sweet flavor and firm texture. The edamame market is growing in the United States, creating a need for more adapted varieties. The genetic diversity is low among adapted large-seeded breeding lines. Finding diverse accessions will help develop larger and …
Soil Properties That Influence The Occurrence Of Hydrogen Sulfide Toxicity In Rice Fields, Julia Marie Fryer
Soil Properties That Influence The Occurrence Of Hydrogen Sulfide Toxicity In Rice Fields, Julia Marie Fryer
Graduate Theses and Dissertations
Rice (Oryza sativa L.) producers face many challenges throughout each growing season. Hydrogen sulfide (H2S) toxicity is a physiological disorder where sulfate (SO42-) is excessively reduced to the toxic gas, H2S. This can reduce yield and, in severe cases, result in crop death. The main research objectives were to: i) understand chemical and physical characteristics in soils prone to H2S toxicity, ii) determine influential soil characteristics on the incidence of H2S toxicity, iii) determine ammonium sulfate ((NH4)2SO4) fertilizer additions influence on H2S toxicity, and iv) predict when and where H2S will occur. Three greenhouse experiments were conducted using Arkansas field …
Effect Of A Skating Unit On Fitness In Fifth Grade Students, Eric Lange
Effect Of A Skating Unit On Fitness In Fifth Grade Students, Eric Lange
Graduate Theses and Dissertations
The purpose of this quantitative study investigates the effect of a skating unit on factors of cardiovascular fitness, static balance, explosive power, and agility in fifth graders. Methods: During a 6-weeks skating unit (twelve lesson), seventy-one students (ages 10-12; M age = 10.34) participated during regularly scheduled physical education classes. Three separate classes served as control group (C) (n=19; 8 male; 11 female) and two experimental groups: roller skating (RS) (n=26; 11 male; 15 female) and inline skating (IS) (n=26; 10 male; 16 female). Control group had no access to roller or inline skates during class time of study. Control …
Consumers' Willingness To Pay For Specialty Table Eggs, Rachel Braun
Consumers' Willingness To Pay For Specialty Table Eggs, Rachel Braun
Supply Chain Management Undergraduate Honors Theses
The purpose of this research is to define the relationship between two constructs and the purchasing behavior of consumers. These two constructs are composed of zoocentric and anthropocentric ideologies, which are established according to one’s attitudes towards an animal’s purpose on earth in relation to humans. This study investigates the effect that these two viewpoints have on a consumer’s willingness to pay for specialty table eggs and conventional table eggs. Using a survey questionnaire, we sampled 327 college students to test these relationships. Using confirmatory factor analysis to establish construct validity and hierarchical linear regression to test the hypotheses, we …
Ansc, Spring 2018, University Of Arkansas, Fayetteville. Department Of Animal Sciences
Ansc, Spring 2018, University Of Arkansas, Fayetteville. Department Of Animal Sciences
Animal Science Newsletter
"Dedicated to the Alumni and Friends of the Animal Sciences Department, University of Arkansas."
State-Level Fiscal Impact Of The Succeed Scholarship Program 2017-2018, Julie R. Trivitt, Corey A. Deangelis
State-Level Fiscal Impact Of The Succeed Scholarship Program 2017-2018, Julie R. Trivitt, Corey A. Deangelis
Arkansas Education Reports
Arkansas created the Succeed Scholarship Program in the spring 2015 legislative session when House Bill 1552 was passed. This program allows students with disabilities to receive state funding for private school tuition up to the foundation funding amount determined by the matrix funding system used in Arkansas.
Animal Science E-Newsletter, February 2018, University Of Arkansas, Fayetteville. Department Of Animal Sciences
Animal Science E-Newsletter, February 2018, University Of Arkansas, Fayetteville. Department Of Animal Sciences
Animal Science e-Newsletter
No abstract provided.
Annual Report, 2018, University Of Arkansas, Fayetteville. Dale Bumpers College Of Agricultural, Food And Life Sciences. Dept. Of Biological And Agricultural Engineering
Annual Report, 2018, University Of Arkansas, Fayetteville. Dale Bumpers College Of Agricultural, Food And Life Sciences. Dept. Of Biological And Agricultural Engineering
Biological and Agricultural Engineering Department Annual Report
No abstract provided.
Arkansas Women's Golf Record Book, 2017-2018, University Of Arkansas, Fayetteville. Athletics Media Relations
Arkansas Women's Golf Record Book, 2017-2018, University Of Arkansas, Fayetteville. Athletics Media Relations
Arkansas Women's Golf
No abstract provided.
Arkansas Razorbacks, 2017-2018, University Of Arkansas, Fayetteville. Athletics Media Relations
Arkansas Razorbacks, 2017-2018, University Of Arkansas, Fayetteville. Athletics Media Relations
Arkansas Men’s Basketball
No abstract provided.
Washington County Assessment: How Viable Are Food Distribution Centers?, Kevin M. Fitzpatrick, Matthew Spialek, Diana Cascante
Washington County Assessment: How Viable Are Food Distribution Centers?, Kevin M. Fitzpatrick, Matthew Spialek, Diana Cascante
Food Insecurity
Having previously implemented and executed two comprehensive surveys examining food insecurity, nutrition, and health among Fayetteville intermediate students attending Owl Creek (Fitzpatrick et al. 2009), and Springdale high school students (Fitzpatrick et al. 2015), the current work examined food insecurity at several levels of aggregation in Washington County. The first part of the project entailed cataloging the 32 census tracts in Washington County based on their risk for being food insecure. A food insecurity risk scale was created using 16 social, economic, demographic, and housing variables that all have been associated with food insecurity, poverty, and social risk at the …
Undergraduate Catalog Of Studies, 2017-2018, University Of Arkansas, Fayetteville
Undergraduate Catalog Of Studies, 2017-2018, University Of Arkansas, Fayetteville
Undergraduate Catalog of Studies
No abstract provided.
New For Discovery: Scholarworks@Uark, Discovery Editors
New For Discovery: Scholarworks@Uark, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 19 2018, Several Authors
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 19 2018, Several Authors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
A Message From The Department Head Of Horticulture And Food Science, Wayne Mackey
A Message From The Department Head Of Horticulture And Food Science, Wayne Mackey
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Contents, Discovery Editors
Contents, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Predicting Kidding Date Using Prepartum Milk Calcium Concentrations And Comparing Kid Growth To Colostrum Quality In Goats, Justin M. Hamm
Predicting Kidding Date Using Prepartum Milk Calcium Concentrations And Comparing Kid Growth To Colostrum Quality In Goats, Justin M. Hamm
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Goats have an ancient history with humankind and are used as a red meat source around the world. This provides an opportunity in Arkansas agriculture. There is a gap in goat research which facilitated the conception of the study’s objectives to determine whether prepartum milk in goats showed a rise in calcium levels within 24 to 48 hours of kidding and to ascertain whether an increased colostrum density is indicative of increased weight gain in kids. Eleven does were bred out of season and monitored for mammary development. Then, 5 to 15 mL of prepartum milk were collected, and the …