Digital Commons Network^™

Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl

IGC Proceedings (1977-2023)

Production of biosolids has been increasing consistently in the last few years. Land application of wastes is being regarded as an alternative means of disposal and as a source of inexpensive fertilizer material. Pastures are particularly attractive in this regard since the areas occupied are extensive and large amounts of fertilizer are required for adequate production. The objective of this study is to investigate the effects of various rates of biosolids on bahiagrass yield and quality. Forage samples were collected from each plot from April to December. Significant increases in dry matter production, crude protein content and in vitro digestibility …

Effect Of N And P Fertilizers On Nutritive Value Of Dwarf Elephantgrass (Pennisetum Purpureum) Cv N-75 Mott, J R. Faria, B Gonzalez, J Faria-Marmoll, D E. Morillo

IGC Proceedings (1977-2023)

Crude protein (CP), Ca and P concentrations and in vitro dry matter digestibility (IVDMD) of irrigated dwarf elephantgrass (Pennisetum purpureum cv. N-75 Mott) as affected by the factorial combination of N (0, 150, 300 and 450 kg N/ha/year) and P (0, 50 and 100 kg P205/ha/year) fertilization was evaluated in a tropical dry forest in Zulia State, western region of Venezuela. A randomized complete block design with three replications was used. Soil was a low-fertility sandy-loam Udic Paleustalf (pH 6.1). Nitrogen fertilization did not influence (P>0.05) any of the variables. Mean CP, IVDMD, Ca and P were: 8.13, …

Effect Of The N And P On Yield And Sward And Dwarf Elephant Grass Pennisetum Purpureum Cv. Mott., J R. Faria, B Gonzalez, J Faria

IGC Proceedings (1977-2023)

The effect of nitrogen and phosphorus application on yield and sward structure as height and leaf, stem and dead forage composition of dwarf elephant grass (Pennisetum purpureum Schumach) cv. Mott was studied under field conditions and complementary irrigation, during one year at very dry tropical forest with a semiarid climate in Venezuela. The nitrogen (N) and Phosphorus (P) rate were 0, 150, 350, 450, kg ha-1 year and 0, 50 and 100 kg P2O5 ha-1 year respectively. The N rate increased the plant height (81.52 cm), leaf, stem and death production (10, 8.13, and 1.62 t DM ha-1 respectively) …

Effects Of Different Phosphate Fertilizers On Pasture Nutrition And Soil Phosphorus In Canterbury, New Zealand, L M. Condron, K M. Goh

IGC Proceedings (1977-2023)

A field trial was conducted over 6 years to assess the relative performance of three phosphate (P) fertilisers of differing solubility (single superphosphate, ‘longlife’ superphosphate, ‘reactive’ phosphate rock) on a permanent pasture at Methven in Canterbury, New Zealand. Plant P uptake data showed that while the overall relative effectiveness of the fertilisers was closely related to their water-soluble P content (single superphosphate > ‘longlife’ superphosphate > ‘reactive’ phosphate rock), the agronomic efficiency of the sparingly soluble phosphate rock fertiliser improved markedly with time. Soil P analysis demonstrated that significant dissolution of phosphate rock had occurred in the soil, and the findings of …

Field Evaluation Of Soil Acidity Acidity Effects On The Growth Of Annual And Perennial Ryegrasses, N Miles

IGC Proceedings (1977-2023)

Soil acidity limits pasture establishment and productivity in the moister eastern half of South Africa. Sound lime requirement guidelines based on soil test data are required. In the study reported here, lime responses of annual (Lolium multiflorum) and perennial (Lolium perenne) ryegrasses were evaluated in irrigated field trials located on acidic, highly weathered soils. Annual ryegrass (yield response to lime 27 to 32%) was found to be markedly more tolerant of soil acidity than perennial ryegrass (yield response 68%). Acid saturations of up to 20% had little impact on the yield of annual ryegrass, while yield …

Yield And Quality Of Sugarcane As Affected By Phosphate Applied Cation On Soils Of Various Phosphorus Levels, M A. Matin, K Oya, T Shinjo, T Horiguchi

IGC Proceedings (1977-2023)

Effects of phosphate application on the growth, yield and quality of sugarcane (Saccharum officinarum L.) were studied on the soils having various phosphorus levels. Superphosphate was applied to bring the available soil P at 5, 15, 25 and 35 mg P2O5 100 g-1 designated as A, B, C and D levels, respectively. Leaf area index (LAI) and dry matter increased on the higher P plots over the lower P plots. The highest cane yield (74 t ha-1) and sugar yield (10.2 t ha- 1) were obtained from the B plot and the lowest cane yield (51 t ha-1) and sugar …

Evaluation Of Different Bradyrhizobium Sp Strains On Nitrogen Fixation Capacity In Four Forage Legumes, F O. Gallardo, E S. Lopes, M C. Diez

IGC Proceedings (1977-2023)

Eleven available strains of Bradyrhizobium sp were used to test four forage legumes, Crotalaria juncea (Crotalaria), Cajanus cajans (Guandu), Styzolobium deeriagianum (Mucuna-Ana) and Cyamopsis tetragonoloba (Guar) for symbiotic N-fixation ability. Greenhouse experiments were conducted for nine weeks in order to evaluate shoot, root, and nodule dry weight, nodule number, and shoot nitrogen content. Four strains presented relative nitrogen efficiency (RNE) over 100% with Crotalaria cultivar, whereas only one strain was more efficient with Guandu and Mucuna cultivars. Strain 633 was the only one which presented a high yield with Crotalaria, Guandu and Mucuna-Ana cultivars.

N-P-S Fertilizer Effects On Herbage Yield And Brute Protein Contents In An Irrigated Perennial Pasture In South Patagonia, L San Martino, H M. Espina, E Cittadini

IGC Proceedings (1977-2023)

Little research has been done to determine the effect of fertilization on irrigated pastures in Santa Cruz (South Patagonia). The objective of the present study was to estimate the effects of NPS fertilizing effects on forage yield and quality. The trial was set up in 1994 on a Borolic Haplargid soil characterized by low N content (0.00875% total N), low P availability (9 ppm Olsen) and medium alcalinity (pH 8.4). Pasture was dominated by tall fescue (95%) with 5% of alfalfa. A Complete Radom Design was used and N-P2O5-S nutrients were applied at rates of 120-100-50 kg.ha-1. Monthly mowing began …

Medical School Watercooler Newsletter - June 21, 2024, Lindsey Lyle

Watercooler Newsletter

This is the June 21, 2024 edition of the Frederick P. Whiddon College of Medicine’s newsletter - Watercooler.

Contents Include

• Prakash named 2024 recipient of the Samuel H. Wilson Award for Studies on DNA Repair
• M3 students prepare for patient care in the clinical setting
• Medical student selected to present findings of MS research at national forum
• Pediatric gastroenterologist joins pediatrics faculty
• Class of 2026 dons white coats, GHHS inducts new members

Impact Of Physical Intimate Partner Violence On Postpartum Depression And Breastfeeding Duration In American Indian And Alaska Native Women, Zoe Resnick Milavetz Green, Marcia Bennett, Abby Hughes-Scalise, James Theisen, Julie Beans

Theses and Graduate Projects

In Alaska, 46 to 91 percent of American Indian and Alaska Native women have experienced physical intimate partner violence (IPV), compared to all women in other states, where the prevalence ranges from seven to 51 percent (Tjaden & Thoennes, 2000). Experiencing physical IPV has negative consequences on the mother’s physical and mental well-being, and has been associated with increased vulnerability to postpartum depression (PPD). Compared to other populations, American Indian and Alaska Native women are at greater risk for PPD due to less access to resources and less research on treatments (MacDorman, 2011). Additionally, American Indian and Alaska Native women …

Active Molecular Network Discovery Links Lifestyle Variables To Breast Cancer In The Long Island Breast Cancer Study Project., Miao Yu, Qian Li, Georgia Dolios, Peijun Tu, Susan Teitelbaum, Jia Chen, Lauren Petrick

Faculty Research 2024

A healthy lifestyle has been associated with decreased risk of developing breast cancer. Using untargeted metabolomics profiling, which provides unbiased information regarding lifestyle choices such as diet and exercise, we aim to identify the molecular mechanisms connecting lifestyle and breast cancer through network analysis. A total of 100 postmenopausal women, 50 with breast cancer and 50 cancer-free controls, were selected from the Long Island Breast Cancer Study Project (LIBCSP). We measured untargeted plasma metabolomics using liquid chromatography-high-resolution mass spectrometry (LC-HRMS). Using the "enet" package, we retained highly correlated metabolites representing active molecular network (AMN) clusters for analysis. LASSO was used …

No Evidence For Metabolic Adaptation During Exercise-Related Energy Compensation, E. W. Flanagan, G. Sanchez-Delgado, C. K. Martin, E. Ravussin, H. Pontzer, L. M. Redman

Clinical Research Faculty Publications

The constrained energy model posits that the increased total daily energy expenditure (TDEE) in response to exercise is often less than the energy cost of the exercise prescribed. The mechanisms behind this phenomenon, coined “exercise-related energy compensation” (ExEC), are poorly understood, and it is unknown if ExEC is coupled with metabolic adaptation. Using a randomized controlled 24-week exercise intervention, individuals who demonstrated ExEC were identified. Changes to all components of TDEE and metabolic adaptation were assessed using doubly labeled water over 14 days and room calorimetry over 24-h 48% of individuals exhibited ExEC (−308 ± 158 kcals/day). There were no …

Transfer Students Matter: A Case Study On The Student Experience Of First-Generation Transfer Students At A Four-Year Public University In A Bridge Program, Quishaundra R. Harris

USF Tampa Graduate Theses and Dissertations

This qualitative study aims to establish a knowledge base and learn about the experience of first-generation transfer students who have completed their Associate in Art (AA) degree from a community college and have transitioned to a four-year public university. The study aims to examine first-generation transfer students' sense of belonging and transition at a four-year public university. A qualitative case study was conducted to learn about the experiences of first-generation transfer students who transferred from state community colleges and are currently enrolled at a four-year university in a bridge program. This study was driven by two theoretical frameworks: Schlossberg's transition …

Evaluation Of A Clincally-Integrated Community Health Worker Program To Support Adults With Cardiovascular Conditions: Guided By The Prism Framework, Cynthia Orofo

Dissertations

Chronically ill individuals with cardiovascular diseases (CVDs) have been extensively challenged by the complexities of disease management. Cardiovascular disease remains the leading cause of death in the U.S. Although clinically integrated community health worker (cCHW) support interventions have been increasingly implemented to help manage CVDs, a comprehensive analysis of interventions implemented in real-world settings is lacking. The purpose of this study was to observe and evaluate a cCHW support intervention in a real clinical setting serving adults with CVD using an implementation science perspective, guided by the PRISM Framework.

Improving Anti-Hypertensive Medication Taking: The Direct And Interacting Effects Of Perceived Adherence Difficulty, Adherence Knowledge, And Commitment To Adherence, Yazhen Xiao, Alessandra S. Gessl, Cheryl Nakata, Jelena Spanjol, Stephanie Y. Crawford, Lisa K. Sharp, Anna S. Cui

Business Faculty Publications and Presentations

Background Non-adherence to anti-hypertensive medications is prevalent, leading to increased hospital costs and preventable deaths and disabilities. Managing patient perceptions of adherence difficulties may be key to improving adherence. Objective This study examined the potential negative effect of patients’ perceived difficulties with anti-hypertensive medication taking on adherence, along with whether and how that effect could be reduced through patient knowledge of and commitment to adherence. Method 10,867 adult U.S. residents diagnosed with essential hypertension and prescribed anti-hypertensive medications participated in a cross-sectional online survey using self-reported behaviors and perceptions. Stepwise regressions and mean difference analyses were performed. Results Perceived adherence …

Toxicosis From Range Lupine Ingestion In A Research Herd Of Rafter 7 Merino Sheep, Benjamin J. Weigler, Walter F. Mandeville Iii, Scott Huber, Gary Mccuin, Fabrizio Caragena, Daniel D. Cook, Stephen T. Lee, Chris A. Pritsos

Poisonous Plant Research (PPR)

An outbreak of lupine alkaloid neurotoxicosis and death occurred in sheep grazed on rangeland areas of the Nevada Great Basin during the summer of 2023. Overall, 97 sheep died despite veterinary supportive care. Lupinus argenteus var. utahensis was implicated as the causative plant with high levels of lupanine (11.5 µg/mg) and spartiene (13.7 µg/mg) in collected and archived samples. Previous reports of sheep deaths due to lupine ingestion have not been recorded in this region. An increased abundance of the number plants producing seed pods having a high alkaloid content may have been associated with abnormally elevated levels of precipitation …

Novel Adaptations In Iron Regulation Acquired During Chronic Fungal Cf Infections, Daniel R. Murante

Dartmouth College Ph.D Dissertations

Chronic fungal infections are highly recalcitrant to treatment; we postulated that as populations persist, increasing genetic diversity is reflected in phenotypic heterogeneity, contributing to treatment inefficacies. The study of evolutionary patterns is underrepresented in chronic fungal infections, and to supplement this body of knowledge, we leveraged isolates acquired from four individuals with chronic fungal-dominated cystic fibrosis infections. We evaluated in-host evolution through a whole-genome sequencing approach, comparing multiple isolates obtained from each subject's sputum and bronchoalveolar lavage fluid. Our analysis found non-synonymous mutations that arose in parallel across the independent infections in the gene MRS4, which encodes a mitochondrial …

Application And Development Of Ceragenins In Medical Device Coatings For Clinical Settings, Elliot E. Sherren

Theses and Dissertations

Hospital-acquired infections (HAIs) pose a significant and increasing threat to global health. One primary cause of this threat is increasing antibiotic resistance. As traditional antibiotics continue to grow less effective, there is an urgent need for novel antimicrobial strategies. This work explores the potential of ceragenins, also known as cationic steroid antimicrobials (CSAs), as a promising alternative to combat HAIs. Specifically, we investigated potential roles that CSAs can play in the context of multiple medical device coatings in healthcare settings. Ceragenins are synthetic mimic of antimicrobial peptides (AMPs) which exhibit broad-spectrum antimicrobial activity against many common pathogens that have been …

Protocol For Seahorse Analysis Of Ex Vivo Mouse Brown And White Adipose Tissues, Fenfen Wang, Phu M Huynh, Yu A An

Faculty, Staff and Student Publications

The mitochondrial stress test is a gold-standard approach for assessing adipose tissue physiological functions and pathological changes. Here, we present a protocol for conducting Seahorse assays using ex vivo mouse brown and white adipose depots. We describe steps for rehydrating the cartridge, preparing freshly harvested fat depots, placing them onto an islet capture plate, and incubating them in a non-CO2 incubator. We then detail procedures for adding mitochondrial stressor solutions and conducting the mitochondrial stress test using the Seahorse XFe24 Analyzer. For complete details on the use and execution of this protocol, please refer to An et al.1.

When John Locke Meets Lao Tzu: The Relationship Between Intellectual Property, Biodiversity, And Indigenous Knowledge And The Implications For Food Security, Paolo Davide Farah, Marek Prityi

Duke Environmental Law & Policy Forum

No abstract provided.

Adolescent Obesogenic Behaviors: The Influence Of Race/Ethnicity, Generation Status, Acculturation, And Tme Lived Outside The United States, Tien D. Vo, Alisha H. Redelfs, Mackay Graper, Lori A. Spruance

Journal of Social, Behavioral, and Health Sciences

Children living with obesity are at higher risk for chronic disease. Dietary behaviors, sedentary time, and physical activity contribute to the risk of developing obesity. The purpose of this research was to identify associations between acculturation and race/ethnicity influences on obesogenic behaviors in middle school students. A national convenience sample of diverse U.S. children (11–14) was recruited to participate in an online survey (N = 615). Dietary behaviors, including fruit and vegetable consumption (F/V) and sugar-sweetened beverage consumption (SSB), as well as screen time and physical activity, were quantified. Multivariable regression models (linear and logistic) were built. We analyzed …

The Association Between Mental Health And Fibromyalgia In African Americans, Shalika J. Tisinger

Walden Dissertations and Doctoral Studies

Depression and fibromyalgia can often exacerbate each other and are known to be bidirectional disorders. Chronic pain from fibromyalgia often leads to depression, and depression can cause pain to become worse and affect the nervous system, causing pain. The purpose of this quantitative, binary logistic regression study is to determine if there is an association between mental health and fibromyalgia in African Americans while controlling for cardiovascular disease, chronic kidney disease, arthritis, education level (ie. Some high school, high school graduate, some college or higher), diet, poverty-income-ratio, PIR, diabetes, gender, and age. The socio-ecological model included in this cross-sectional study …

The Association Between Mental Health And Fibromyalgia In African Americans, Shalika J. Tisinger

Walden Dissertations and Doctoral Studies

Depression and fibromyalgia can often exacerbate each other and are known to be bidirectional disorders. Chronic pain from fibromyalgia often leads to depression, and depression can cause pain to become worse and affect the nervous system, causing pain. The purpose of this quantitative, binary logistic regression study is to determine if there is an association between mental health and fibromyalgia in African Americans while controlling for cardiovascular disease, chronic kidney disease, arthritis, education level (ie. Some high school, high school graduate, some college or higher), diet, poverty-income-ratio, PIR, diabetes, gender, and age. The socio-ecological model included in this cross-sectional study …

Symbiotic Behaviour Of Alfalfa Varieties Grown In Different Soils, C Scotti, S Gnocchi, M Carelli, P Rotili

IGC Proceedings (1977-2023)

Six alfalfa (Medicago sativa) varieties were grown in two contrasting soils to study their symbiotic ability as estimated by nodule biomass and dry matter yield in presence of the natural population of rhizobia of soil. Varieties can be discriminated on the basis of total (year) nodule biomass; their ranking for nodule biomass was consistent in the different soil types although soils significantly influenced nodulation and dry matter yield.

Long Term Effects Of Liming A Basalt-Derived Soil, On Lucerene And Phalaris Production, K.M. F. Reed, J F. Chin

IGC Proceedings (1977-2023)

Lime incorporated into a basalt-derived clay loam lowered exchangeable aluminium in soil. Soil pH was still elevated, 9 years after 2 t/ha of lime was incorporated. With lower rates of lime the density of lucerne plants declined. Lucerne yield more than doubled with lime. After six years, the area was sown to a phalaris-clover pasture. A 15% increase in the yield of phalaris was recorded from limed plots over the next three years. Despite this, 11 years after liming, herbage P concentrations increased with lime, from 0.28% to 0.35%.

Can Maize Influence The Dissolution Of Low Water Soluble Phosphorus Fertilizers?, S Sinaj, E Frossard

IGC Proceedings (1977-2023)

The objectives of this study were to evaluate the respective importance of maize (Zea mays) and soil properties on the dissolution of two sparingly soluble P fertilizers. The surface horizon of an acidic and a calcareous soils were amended with Thomas’ slag or phosphate rock and were either incubated or cultivated with maize. Maize cultivation increased the rate of dissolution of both fertilizers in both soils. Its influence remained limited compared to fertilizer dissolution in the incubated acidic soil. In the calcareous soil, however, the presence of maize increased significantly the rate of fertilizer dissolution compared to that observed in …

Phosphorus Availability, Defoliation Tolerance, And Genetic Differentiation In White Clover, D F. Chapman

IGC Proceedings (1977-2023)

The genetic composition of mixed populations of white clover growing in low fertility, grass-dominant hill pastures was estimated four and eight years after populations were established. Populations were based on an adapted ('Grasslands Tahora') or poorly adapted ('Grasslands Huia') cultivar, and received either no fertiliser, or 35kg P /ha /year. The P response curve of surviving plants was also determined, and compared with plants grown from 'standard' seedlines of the respective cultivars. Between years 4 and 8, the proportion of the populations constituted by plants true-to-type for the sown cultivar remained steady at 56 - 58% for Tahora, but fell …

Potassium Rates For Macrotyloma Axillare Growth, R A. Martim, F A. Monteiro, P.R. L. Portilho

IGC Proceedings (1977-2023)

The response of the tropical forage legume macrotiloma guata (Macrotyloma axillare (E. Mey) Verdc) to potassium rates was studied in a greenhouse experiment. The plants were grown in nutrient solution with seven potassium (K) rates, 0; 3.5; 7; 21; 35; 105 and 245 mg l-1 of solution, in randomized complete block design, with four replications. There was significant response of the legume to potassium rates. Considerations are made on the influence of these levels on plant dry matter yield in two harvests, root dry matter production and potassium and magnesium concentrations in the plant tissue.

Phosphogypsum As A Source Of Nutrients For Bahiagrass, J E. Rechcigl, I S. Alcordo

IGC Proceedings (1977-2023)

Phosphogypsum is a by-product of the manufacture of phosphoric acid from phosphate rock and is a potential source of sulfur and calcium for crops. There are currently more than 700 million Mg of phosphogypsum in Florida alone stacked in waste piles and an additional 30 million Mg produced annually. A 3-year study was conducted to determine whether addition of phosphogypsum to bahiagrass would increase production and quality. Results indicate that addition of up to 4.0 Mg/ha phosphogypsum increased bahiagrass yields, protein content, and in vitro digestibility of forage. This study has demonstrated that phosphogypsum can be used as an alternative …

A Review Of Centrosema Pascuorum (Centurion) Cvv. Cavalcade And Bundey As A Pasture Legume In The Ley Farming System Studies In North West Australia, K Thiagalingam, D Zuill, T Price

IGC Proceedings (1977-2023)

Field experiments and commercial experience with the pasture legume Centrosema pascuorum (centurion) in the Katherine and Douglas Daly districts of the Northern Territory over the past ten years were reviewed. Results show that cultivars of this species (Cavalcade and Bundey) have good potential for improving both soil fertility and the quality of dry season forage (as hay or grazing) for cattle in mixed farming systems in the semi-arid tropics of north west Australia.