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Preliminary Report: A Survey Of Aggressive Behaviors In The American Coot (Fulica Americana) At Ballona Wetlands, California, Victor D. Carmona-Galindo, Mariele Anne Courtois, Kiara Cerda

Biology Faculty Works

Understanding interspecific and intraspecific aggression is important for wildlife management and sustainability of populations. The objective of this study was to evaluate whether there is a difference in number of occurrences of interspecific aggression between American coots (Fulica americana) and mallard ducks (Anas platyrhynchos) and intraspecific aggression among American coots in the Ballona wetland habitat of Southern California. Trends in literature describe coots as highly aggressive toward other coots year-round and toward other bird species during the breeding season. Because we conducted observations outside the breeding season, we hypothesized that more instances of intraspecific aggression would …

Evaluation Of Genome-Enabled Selection For Bacterial Cold Water Disease Resistance Using Progeny Performance Data In Rainbow Trout: Insights On Genotyping Methods And Genomic Prediction Models, Roger L. Vallejo, Timothy D. Leeds, Breno O. Fragomen, Guangtu Gao, Alvaro G. Hernandez, Ignacy Misztal, Timothy J. Welch, Gregory D. Wiens, Yniv Palti

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Bacterial cold water disease (BCWD) causes significant economic losses in salmonid aquaculture, and traditional family-based breeding programs aimed at improving BCWD resistance have been limited to exploiting only between-family variation. We used genomic selection (GS) models to predict genomic breeding values (GEBVs) for BCWD resistance in 10 families from the first generation of the NCCCWA BCWD resistance breeding line, compared the predictive ability (PA) of GEBVs to pedigree-based estimated breeding values (EBVs), and compared the impact of two SNP genotyping methods on the accuracy of GEBV predictions. The BCWD phenotypes survival days (DAYS) and survival status (STATUS) had been recorded …

Cheatgrass Is Favored By Warming But Not Co2 Enrichment In A Semi-Arid Grassland, Dana M. Blumenthal, Julie A. Kray, William Ortmans, Lewis H. Ziska, Elise Pendall

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

levated CO₂ and warming may alter terrestrial ecosystems by promoting invasive plants with strong community

and ecosystem impacts. Invasive plant responses to elevated CO₂ and warming are difficult to predict, however,

because of the many mechanisms involved, including modification of phenology, physiology, and cycling of nitrogen and water. Understanding the relative and interactive importance of these processes requires multifactor experiments under realistic field conditions. Here, we test how free-air CO₂ enrichment (to 600 ppmv) and infrared warming (+1.5 °C day/3 °C night) influence a functionally and phenologically distinct invasive plant in semi-arid mixed-grass prairie. Bromus tectorum (cheatgrass), …

Management Characteristics Of Beef Cattle Production In The Northern Plains And Midwest Regions Of The United States, Senorpe Asem-Hiablie, C. Alan Rotz, Robert Stout, Kim Stackhouse-Lawson

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

A comprehensive life cycle assessment of United States beef will provide benchmarks and identify opportunities for improvement. On-going region-specific data collection is characterizing cattle production practices for a more accurate assessment. This study reports production information obtained via online surveys and on-site visits from 2 of 7 regions: the Northern Plains (Nebraska, North Dakota, and South Dakota) and Midwest (Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, and Wisconsin). Ranch responses (n = 512) represented 1.6% of beef cows maintained in both regions with operation sizes varying from 1 to 12,500 cows. Feedlot responses (n = 120) represented 9.6 and 3.7% of …

Crop Residue Management And Fertilization Effects On Soil Organic Matter And Associated Biological Properties, Bingzi Zhao, Jiabao Zhang, Yueyue Yu, Douglas Karlen, Xiying Hao

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Returning crop residue may result in nutrient reduction in soil in the first few years. A two-year field experiment was conducted to assess whether this negative effect is alleviated by improved crop residue management (CRM). Nine treatments (3 CRM and 3 N fertilizer rates) were used. The CRM treatments were (1) R0: 100 % of the N using mineral fertilizer with no crop residues return; (2) R: crop residue plus mineral fertilizer as for the R0; and (3) Rc: crop residue plus 83 % of the N using mineral and 17 % manure fertilizer. Each CRM received N fertilizer rates …

Cqestr Simulated Changes In Soil Organic Carbon Under Residue Management Practices In Continuous Corn Systems, Brian J. Wienhold, Marty R. Schmer, Virginia L. Jin, Gary E. Varvel, Hero Gollany

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Soil organic carbon (SOC) is an important soil property and is strongly influenced by management. Changes in SOC stocks are difficult to measure through direct sampling, requiring both long time periods and intensive sampling to detect small changes in the large, highly variable pool. Models have the potential to predict management-induced changes in SOC stocks, but require long-term data sets for validation. CQESTR is a processed based C model that uses site weather, management, and crop data to estimate changes in SOC stocks. Crop residue removal for livestock feed or future biofuel feedstock use is a management practice that potentially …

Hot-Melt Extrusion: A Versatile Pharmaceutical Technology, Hemlata Patil

Electronic Theses and Dissertations

Hot-melt extrusion (HME) is a promising technology for the production of new chemical entities in the developmental pipeline and for improving products already on the market. The first objective of this research work was to describe a continuous process for the production of solid lipid nanoparticles (SLN) as drug-carrier systems via hot-melt extrusion (HME) using Quality by Design (QbD) principles. Fenofibrate SLN were prepared by combining two processes: HME technology for melt-emulsification and high-pressure homogenization (HPH) for size reduction. Varying the process parameters enabled the production of SLN below 200 nm. At the end of a 5-h in-vitro dissolution study, …

Maternal Melodrama And Modern Horror: Genre Hybridity In Southern Film, Sara Marcella Williams

Electronic Theses and Dissertations

This dissertation establishes the groundwork for a new genre of Southern film – a hybrid genre that I call Southern maternal horror. By integrating key elements from the genres of maternal melodrama and modern horror into Southern narratives, Southern maternal horror uses the central ambivalence found in both genres – manifesting as a desire to both return to and escape from one’s maternal origins – to challenge Southern nostalgia. Specifically, within its distinctly Southern framework, this hybrid genre frequently disrupts the romanticized notions of the Old South typically found in classic Southern films such as Gone With the Wind: idealizations …

Scalable Production Of Glioblastoma Tumor-Initiating Cells In 3 Dimension Thermoreversible Hydrogels, Qiang Li, Haishuang Lin, Ou Wang, Xuefeng Qiu, Srivatsan Kidambi, Loic P. Deleyrolle, Brent A. Reynolds, Yuguo Lei

Department of Chemical and Biomolecular Engineering: Faculty Publications

There is growing interest in developing drugs that specifically target glioblastoma tumor-initiating cells (TICs). Current cell culture methods, however, cannot cost-effectively produce the large numbers of glioblastoma TICs required for drug discovery and development. In this paper we report a new method that encapsulates patient-derived primary glioblastoma TICs and grows them in 3 dimension thermoreversible hydrogels. Our method allows long-term culture (~50 days, 10 passages tested, accumulative ~>10¹⁰-fold expansion) with both high growth rate (~20-fold expansion/7 days) and high volumetric yield (~2.0 × 10⁷ cells/ml) without the loss of stemness. The scalable method can be used …

The Identification Of Haemonchus Species And Diagnosis Of Haemonchosis, Dante Zarlenga, E.P. Hoberg, W. Tuo

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Diagnosis is often equated with identification or detection when discussing parasitic diseases. Unfortunately, these are not necessarily mutually exclusive activities; diseases and infections are generally diagnosed and organisms are identified. Diagnosis is commonly predicated upon some clinical signs; in an effort to determine the causative agent, identification of genera and species is subsequently performed. Both identification and diagnosis play critical roles in managing an infection, and involve the interplay of direct and indirect methods of detection, particularly in light of the complex and expanding problem of drug-resistance in parasites. Accurate and authoritative identification that is cost- and time-effective, based on …

A Mycobacterium Avium Subsp. Paratuberculosis Predicted Serine Protease Is Associated With Acid Stress And Intraphagosomal Survival, Abirami Kugadas, Elise A. Lamont, John Bannantine, Fernanda Miyagaki Shoyama, Evan Brenner, Harish K. Janagama, Srinand Sreevatsan

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The ability to maintain intra-cellular pH is crucial for bacteria and other microbes to survive in diverse environments, particularly those that undergo fluctuations in pH. Mechanisms of acid resistance remain poorly understood in mycobacteria. Although, studies investigating acid stress in M. tuberculosis are gaining traction, few center on Mycobacterium avium subsp. paratuberculosis (MAP), the etiological agent of chronic enteritis in ruminants. We identified a MAP acid stress response network involved in macrophage infection. The central node of this network was MAP0403, a predicted serine protease that shared an 86% amino acid identity with MarP in M. tuberculosis. Previous studies confirmed …

Nlpc/P60 Domain-Containing Proteins Of Mycobacterium Avium Subspecies Paratuberculosis That Differentially Bind And Hydrolyze Peptidoglycan, J. P. Bannantine, Cari K. Lingle, Philip R. Adam, Kasra X. Ramyar, William J. Mcwhorter, William D. Picking, Brian V. Geisbrecht

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

A subset of proteins containing NlpC/P60 domains are bacterial peptidoglycan hydrolases that cleave noncanonical peptide linkages and contribute to cell wall remodeling as well as cell separation during late stages of division. Some of these proteins have been shown to cleave peptidoglycan in Mycobacterium tuberculosis and play a role in Mycobacterium marinum virulence of zebra fish; however, there are still significant knowledge gaps concerning the molecular function of these proteins in Mycobacterium avium subspecies paratuberculosis (MAP). The MAP genome sequence encodes five NlpC/P60 domain-containing proteins. We describe atomic resolution crystal structures of two such MAP proteins, MAP_1272c and MAP_1204. These …

Effect Of Interpersonal And Cognitive Stressors On Habituation And The Utility Of Heart Rate Variability To Measure Habituation, Denise M. Feda, James N. Roemmich

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Habituation is a decrease in responding to a repeated stimulus. Operant responding and salivation measure habituation in eating behaviour research. Stress may increase eating by acting as a distractor, yielding spontaneous recovery and prolonging responding for food. Our research tested differences in the ability of cognitive and inter- personal stressors to recover responding for food. We also tested heart rate variability (HRV) as a measure of habituation. Twenty women worked for portions of macaroni and cheese for 15 trials on three separate laboratory visits. Between the 12th and 13th trial, one of three different stressor types (speech, stroop and subtraction) …

Managing Hyperglycemia In Critically Ill Patients: Where Are We Now?, Umer Shoukat, Md, Umer Mukhtar, Md, M. Kamran Athar, Md

JHN Journal

Hyperglycemia is common in critically ill patients and is associated with increased morbidity, mortality, rate of infections and length of hospital stay. For decades, hyperglycemia in critically ill population was considered an adaptive response and interventions were only considered if diabetic ketoacidosis (DKA) or severe hyperosmolar states developed. Furnary et al published studies showing lower sternal wound infection rates in cardiac surgical patients with control of glucose (180-220 mg/dl). This led to the dissemination of the “Portland Protocol,” but it was not widely accepted.1, 2

Management of hyperglycemia changed with the publication of Van Den Berghe study.3 This was a …

Novel Therapies For Intracerebral Hemorrhage, Fred Rincon, Md, Msc, Facp, Fccp, Fccm

JHN Journal

INTRODUCTION

Intracerebral hemorrhage is by far the most destructive form of stroke1. Apart from the management in a specialized stroke or neurological intensive care unit (NICU), no specific therapies have been shown to consistently improve outcomes after ICH2. Current Guidelines endorse early aggressive optimization of physiologic derangements with ventilatory support when indicated, blood pressure control, reversal of any preexisting coagulopathy, intracranial pressure monitoring for certain cases, osmotherapy, temperature modulation, seizure prophylaxis, treatment of hyerglycemia, and nutritional support in the stroke unit or NICU. Ventriculostomy is the cornerstone of therapy for control of intracranial pressure patients with intraventricular hemorrhage. 3, 4 …

A Multi-Scale Approach To Study Solid Oxide Fuel Cells: From Mechanical Properties And Crystal Structure Of The Cell's Materials To The Development Of An Interactive And Interconnected Educational Tool, Amjad Aman

Electronic Theses and Dissertations

Solid Oxide Fuel Cells are energy conversion devices that convert chemical energy of a fuel directly into electrical energy. They are known for being fuel-flexible, have minimal harmful emissions, ideal for combined heat and power applications, highly energy-efficient when combined with gas or steam turbines. The current challenges facing the widespread adoption these fuel cells include cost reduction, long-term testing of fully integrated systems, improving the fuel cell stack and system performance, and studies related to reliability, robustness and durability. The goal of this dissertation is to further the understanding of the mechanical properties and crystal structure of materials used …

Laser Mobile Mapping Standards And Applications In Transportation, Steven D. Johnson, James S. Bethel, Chisaphat Supunyachotsakul, Scott Peterson

JTRP Technical Reports

This report describes the work that was done to support the development of a chapter for the INDOT Survey Manual on Mobile Mapping. The work includes experiments that were done, data that was collected, analysis that was carried out, and conclusions that were drawn about accuracy of Mobile Terrestrial Laser Scanning (MTLS) systems. The resulting Manual chapter, located in the appendix, defines standards and procedures for preparing, collecting, editing, delivering, exploiting, and archiving electronic mapping data that is created for Indiana Department of Transportation (INDOT). The purpose of the standards and procedures within this manual is to obtain statewide uniformity …

Performance Assessment Of Road Barriers In Indiana, Yaotian Zou, Andrew P. Tarko

JTRP Technical Reports

Road barriers have been used as an effective countermeasure to prevent exposure of errant vehicles to both vehicles travelling in the opposite direction and to roadside hazards. The objective of this study was to evaluate the in-service safety performance of three types of road barriers (concrete barriers, steel W-beam guardrails, and high-tension cable barriers) in Indiana using cross-sectional analysis based on crash data. The quantitative evaluation was comprised of three components: 1) the effect of the road, barrier scenarios, and traffic on the barrier-relevant (BR) crash frequency, 2) the effect of the road and the barrier scenarios on the BR …

A Comparison Of Shovel Testing And Surface Collection As Archaeological Site Discovery Methods: A Case Study Using Mississippian Farmsteads, Cameron Smith Howell

Electronic Theses and Dissertations

Shovel testing and controlled surface collection are commethods of archaeological site investigation that are generally approved by state and federal agencies as well as the academic community for cultural resource management projects and research. While both techniques are equally utilized, little research has been conducted on how equivalent these techniques are in terms of their efficacy for finding site. This thesis seeks to find a way to compare these techniques by creating mathematical models to describe how well the methods behave when tested on known datasets generated from Mississippian period farmsteads. The predicted performance can then be compared to real …

Linearly Stressed To Death: Consideration Of Early Childhood Stress As A Main Contributor To The Regional Variability In Classic Maya Mortuary Profiles, Nicholas Billstrand

Electronic Theses and Dissertations

The Late and Terminal Classic periods were times of great social, economic, and political change in Maya civilization. Scholars have suggested that increasing levels of dietary stress during this time may have been the result of ecological instability, drought, warfare, and significant levels of population movement across the Maya lowlands. All of these processes may have affected human health and left measurable markers of stress in human skeletal material. The burial population recovered from two sites on Ambergris Caye, located near the coast of Belize, have significantly more sub-adult individuals than sites in inland Belize, such as Actuncan, suggesting the …

Intermediate Russian Through Formula Tales, Tamar Karakozova

Electronic Theses and Dissertations

The dissertation presents a study of on the benefits of formula tales in university-level foreign language classrooms during grammar practice activities. The study investigates students’ attitudes toward the use of such texts in the post-secondary foreign language environment. In addition, differences between and among the participant-students is analyzed. Cognitive learning theory, noticing hypothesis, and content-based instruction provide the theoretical framework for the study.

Strangers Among Us: Invasive Plants In British Literature, 1669-1800., Thomas Lance Bullington

Electronic Theses and Dissertations

Exotic flora in the long eighteenth century (1666-1800) embodied a point of contact between the natural and imaginary worlds, bearing witness to the ways that ideology relocates living things according to human desire. Most accounts view these exotics through the lens of ecological imperialism and “invasive” species. Both of these terms are twenty-first century metaphors that materialize the role of imperialism in circulating exotics, applying the narrative of invading British empire to the behavior of foreign plants. However, such accounts do not fully acknowledge the cultural work that images of foreign plants do. I opt instead for an ecocritical reappraisal …

Spine Lifting Biomechanics Between Varying Occupational Activity Levels And Recreational Physical Activity Levels, Caitlin Rose Francis

Electronic Theses and Dissertations

Background: Moderate to vigorous physical activity as the optimum movement patterns for health have continued to be the dominant focus of health and fitness research. Yet, emerging evidence of deleterious, adverse health effects of prolonged inactivity, independent of regular physical activity, presents a new element to establishing the ideal model of movement patterns for health. The musculoskeletal trunk of the body becomes unbalanced as a result of prolonged inactivity, and a biomechanical analysis can help to identify high-risk loading behavior associated with these unbalances. Moreover, poor spine biomechanics can indicate a need for adjustment to present recommendations for optimum movement …

Bacteria Prediction For Recreational Waters Through The Use Of Artificial Neural Networks, Christopher Douglas

Electronic Theses and Dissertations

Many scientists and government agencies rely on Fecal Indicator Bacteria (FIB) to determine the risk of exposure to pathogens in water. If there is a presence of these indicator bacteria, pathogenic microorganisms may also be present. These bacteria in recreational water bodies pose a health threat to people if ingested during activities such as swimming or from the consumption of marine life. The most commonly tested FIBs are total coliforms, Fecal coliforms, Escherichia coli, Fecal streptococci, and enterococci. The measurement of bacteria can be time consuming (up to 48 hours) and expensive, creating a difficulty in warning the public of …

Effects Of Chronic Mild Stress On Clinically Relevant Endpoints In A Rat Ntg Migraine Model, Mary Katherine Jourdan

Electronic Theses and Dissertations

No abstract provided.

Home Is Where The Art Is [A Review Of Home], Walter C. Metz

Publications

In this review of Disney's Home, I perform an intertextual analysis linking it to La noire de... (1964), Ousmane Sembene's post-colonial film about cultural dislocation.

The Neurobiology Of Groupthink: A Qeeg Approach To The Study Of Followership, Angela A. Deulen

Theses and Dissertations

In recent decades, the study of leadership has focused on the qualities of leaders rather than on those of followers. However, it has been argued that there can be no meaningful construct of leadership without a coherent understanding of followership and group behavior. While the body of literature is replete with information on the study of groupthink and conformity as it relates to followership, the neurobiological drivers of such behavior remain under-investigated. The purpose of this work was to investigate the neurobiological basis of groupthink (conformity of thought) as a component of followership. Specifically, this work seeks to investigate six …

Leaders' Roles In Creating And Sustaining Collective Genius, Tanya L. Jones

Theses and Dissertations

This study examined leaders’ roles in fostering collective genius innovation within one private elementary school, including managing the paradoxes of innovation. Based on content analysis of eleven participants, this study found that teamwork, clear student learning outcomes emphasizing individualized learning, design thinking, and a growth mindset, all impacted willingness to innovate. To develop conditions for collective genius, leaders again focus on teamwork as well as being relational. In terms of their management of the six innovative paradoxes, the school leaders tend to balance their affirmation of the individual and the group, support staff and parents, focus on experimentation and learning, …

Wandering The Web--Libraries Gardening With Kids? A Growing Trend, Jeanine Huss, Roxanne Myers Spencer

Against the Grain

No abstract provided.

Is There A Future For Genome-Editing Technologies In Conservation?, J. A. Johnson, R. Altwegg, D. M. Evans, J. G. Ewen, I. J. Gordon, N. Pettorelli, J. K. Young

United States Department of Agriculture Wildlife Services: Staff Publications

In a recent review, Pimm et al. (2015) highlight emerging technologies in protecting biodiversity. While their list is noteworthy, the authors’ exclusion of innovations in genomic research, with the exception of single-species DNA barcoding methods, was surprising given recent advances in genome-editing technology and its potential application to conservation. Taylor & Gemmell (2016) address that deficiency in a subsequent commentary identifying three avenues where emerging genomic technologies have great potential for increasing our ability to conserve biodiversity. Those areas include the use of next-generation sequencing technologies and methods such as RADseq for monitoring genetic diversity, effective population size, and …