Digital Commons Network^™

Design Of University Small-Scale Dairy Processing Facility, Philip J. Hildebrand, Joshua Arejola, Alicia Andersen, Terry Howell Jr, Tami M. Brown-Brandl

Department of Agricultural and Biological Systems Engineering: Faculty Publications

This project was assigned to research the feasibility and value of implementing a dairy processing facility on the campus of the University of Nebraska-Lincoln. The facility would process milk produced from cows under the same roof and will serve as an educational experience for Nebraska dairy farmers, UNL students, and K-12 students in the Lincoln-Lancaster County area. If the project is successful and replicated across the state, this facility could have a significant impact on the reduction of milk transportation costs in the Nebraska dairy industry.

The project began with researching milk processing methods and steps from production to consumption. …

Home-Site Advantage For Host Species–Specific Gut Microbiota, Daniel D. Sprockett, Jeff Price, Anthony Juritsch, Robert J. Schmaltz, Madalena V. F. Real, Samantha L. Goldman, Michael Sheehan, Amanda E. Ramer-Tait, Andrew H. Moeller

Department of Nutrition and Health Sciences: Faculty Publications

Mammalian species harbor compositionally distinct gut microbial communities, but the mechanisms that maintain specificity of symbionts to host species remain unclear. Here, we show that natural selection within house mice (Mus musculus domesticus) drives deterministic assembly of the house-mouse gut microbiota from mixtures of native and non-native microbiotas. Competing microbiotas from wild-derived lines of house mice and other mouse species (Mus and Peromyscus spp.) within germ-free wild-type (WT) and Rag1-knockout (Rag1^−/−) house mice revealed widespread fitness advantages for native gut bacteria. Native bacterial lineages significantly outcompeted non-native lineages in both WT and Rag1 …

Long-Term Conservation And Conventional Tillage Systems Impact Physical And Biochemical Soil Health Indicators In A Corn–Soybean Rotation, Anuoluwa O. Sangotayo, Jemila Chellappa, Udayakumar Sekaran, Sangeeta Bansal, Padma Angmo, Paul J. Jasa, Sandeep Kumar, Javed Iqbal

Department of Agronomy and Horticulture: Faculty Publications

Agricultural management practices tend to influence soil structure stabilization, mediating many physical, chemical, and biological processes in soils. Therefore, understanding the long-term effects of management practices on various soil health indicators is crucial to develop sustainable agricultural practices. This study aimed to assess the long-term conventional and conservation tillage effects on soil physical (aggregates) and biochemical (soil organic carbon [SOC], enzymes, and microbial biomass) parameters under a range of tillage practices in a corn–soybean rotation in Nebraska. The experiment was conducted at two locations as follows: (1) Concord site (36 years) with the three treatments: no-till (NT), disk, and moldboard …

Trade-Offs Between Temperature And Fitness In Euschistus Heros (Fabricius) (Hemiptera: Pentatomidae): Implications For Mass Rearing And Field Management, Ana Paula Frugeri Barrufaldi, Rafael Hayashida, William Wyatt Hoback, Leon G. Higley, Jose Romario De Carvalho, Regiane Cristina De Oliveira

School of Natural Resources: Faculty Publications

The brown stink bug, Euschistus heros (Fabricius, 1798) (Hemiptera: Pentatomidae), is one of the most abundant soybean stink bug pests in Brazil. Temperature is a key factor that affects its development and reproduction, and fluctuating temperatures may impact the development and reproduction of E. heros differently from those under constant temperatures. The objective of this study was to evaluate the influence of constant and fluctuating temperature on the biological characteristics of E. heros in three successive generations. Treatments consisted of six constant temperatures (19^oC, 22^oC, 25^oC, 28^oC, 31^oC and 34 …

Increasing Racial Diversity In The North American Plant Phenotyping Network Through Conference Participation Support, David Lebauer, Alexander Bucksch, Jennifer Clarke, Jesse Potts, Sonali Roy

Department of Statistics: Faculty Publications

A key goal of the North American Plant Phenotyping Network (NAPPN) annual conference is to cultivate a new generation of scientists from diverse backgrounds. As part of their effort to diversify the plant phenomics research community, NAPPN acquired funding to cover all attendance costs for participants from historically black colleges and universities (HBCU) for the 2022 annual meeting. Seven award recipients represented the first attendees from HBCUs in the conference’s 6-year history. In this commentary, we report on the impact of the conference awards, including lessons learned, and the future of the award.

Helminth Parasites Of The Giant Toad, Rhinella Horribilis (Wiegmann, 1833) (Anura: Bufonidae) From Central Mexico, Jorge Falcón-Ordaz, Cristian Raúl Olvera-Olvera, Marisol Moreno-Chávez, Griselda Pulido-Flores, Scott Monks, Luis García-Prieto

MANTER: Journal of Parasite Biodiversity

As part of an ongoing project to inventory the helminth parasites of amphibians from the state of Hidalgo, Central Mexico, specimens of Rhinella horribilis were collected from three municipalities: Eloxochitlán, Huehuetla, and San Felipe Orizatlán. A total of eight taxa of helminths were found: three digeneans (Haematoloechus sp., Langeronia macrocirra, and Mesocoelium danforthi) and five nematodes (Cosmocerca sp., Cruzia morleyi, Ochoterenella chiapensis, Oswaldocruzia subauricularis, and Rhabdias sp.). The highest species richness was recorded in Huehuetla. All reports of these species of helminths represent new locality records for Mexico.

Utilizing NuTrack To Access The Activity Levels In Pigs With Varying Degrees Of Genetic Potential For Growth And Feed Intake, Dalton Obermier, Melanie Trenahile-Grannemann, Ty B. Schmidt, Tom Rathje, Benny Mote

Department of Animal Science: Faculty Publications

Feed cost accounts for over two-thirds of the variable cost of production. In order to reduce feed costs without sacrificing production numbers, feed efficiency must be improved. Calorie expenditure has been difficult to quantify in the past but is understood to impact residual feed intake (RFI) greatly. The objective of this work was to utilize an advanced computer vision system to evaluate activity levels across sex and sire groups with different expected breeding value combinations for growth and feed intake. A total of 199 pigs from four different sire groups (DNA Genetics Line 600) High Feed Intake/High Growth (HIHG), Low …

Early Executive Control Buffers Risk For Adolescent Psychopathology During The Covid‐19 Pandemic, Lauren M. Laifer, Cara C. Tomaso, Olivia D. Chang, Eric Phillips, Tiffany D. James, Jennifer Nelson, Kimberly Andrews Espy, W. Alex Mason, Timothy D. Nelson

Department of Psychology: Faculty Publications

Background: The coronavirus disease 2019 (COVID‐19) pandemic has had a global impact on youth mental health, and there is a critical need for research examining individual factors that contribute to increased psychopathology during the pandemic. The current study explored whether executive control (EC) abilities in early childhood interact with COVID‐related stress to attenuate risk for adolescent psychopathology during the first 6 months of the pandemic.

Methods: Participants were 337 youth (49% female) living in a small midwestern city in the United States. Participants completed EC tasks when they were approximately 4.5 years old as part of a longitudinal …

Hybrid Allele‑Specific Chip‑Seq Analysis Identifies Variation In Brassinosteroid‑Responsive Transcription Factor Binding Linked To Traits In Maize, Thomas Hartwig, Michael Banf, Gisele Passaia Prietsch, Jia‑Ying Zhu, Isabel Mora‑Ramírez, Jos H. M. Schippers, Samantha J. Snodgrass, Arun S. Seetharam, Bruno Huettel, Judith M. Kolkman, Jiashi Yang, Julia Engelhorn, Zhi‑Yong Wang

Department of Agronomy and Horticulture: Faculty Publications

Background: Genetic variation in regulatory sequences that alter transcription factor (TF) binding is a major cause of phenotypic diversity. Brassinosteroid is a growth hormone that has major effects on plant phenotypes. Genetic variation in brassinosteroidresponsive cis-elements likely contributes to trait variation. Pinpointing such regulatory variations and quantitative genomic analysis of the variation in TF-target binding, however, remains challenging. How variation in transcriptional targets of signaling pathways such as the brassinosteroid pathway contributes to phenotypic variation is an important question to be investigated with innovative approaches.

Results: Here, we use a hybrid allele-specific chromatin binding sequencing (HASChseq) approach and …

Spontaneous Allelic Variant In Deafness–Blindness Gene Ush1g Resulting In An Expanded Phenotype, Vladimir Vartanian, Jocelyn F. Krey, Paroma Chatterjee, Allison Curtis, Makayla Six, Sean P. M. Rice, Sherri M. Jones, Harini Sampath, Charles N. Allen, Renee C. Ryals, R. Stephen Lloyd, Peter G. Barr-Gillespie

Department of Special Education and Communication Disorders: Faculty Publications

Relationships between novel phenotypic behaviors and specific genetic alterations are often discovered using target-specific, directed mutagenesis or phenotypic selection following chemical mutagenesis. An alternative approach is to exploit deficiencies in DNA repair pathways that maintain genetic integrity in response to spontaneously induced damage. Mice deficient in the DNA glycosylase NEIL1 show elevated spontaneous mutations, which arise from translesion DNA synthesis past oxidatively induced base damage. Several litters of Neil1 knockout mice included animals that were distinguished by their backwards-walking behavior in open-field environments, while maintaining frantic forward movements in their home cage environment. Other phenotypic manifestations included swim test failures, …

Lessons From Chloroviruses: The Complex And Diverse Roles Of Viruses In Food Webs, John Delong, James L. Van Etten, David Dunigan

School of Biological Sciences: Faculty Publications

Viruses can have large effects on the ecological communities in which they occur. Much of this impact comes from the mortality of host cells, which simultaneously alters microbial community composition and causes the release of matter that can be used by other organisms. However, recent studies indicate that viruses may be even more deeply integrated into the functioning of ecological communities than their effect on nutrient cycling suggests. In particular, chloroviruses, which infect chlorella-like green algae that typically occur as endosymbionts, participate in three types of interactions with other species. Chlororviruses (i) can lure ciliates from a distance, using them …

Macro And Micro-Nutrient Accumulation And Partitioning In Soybean Affected By Water And Nitrogen Supply, Ingrid Silva Setubal, Aderson Soares De Andrade Júnior, Silvestre Paulino Da Silva, Artenisa Cerqueira Rodrigues, Aurenívia Bonifácio, Evandro Henrique Figueiredo Moura Da Silva, Paulo Fernando De Melo Jorge Vieira, Rafael De Souza Miranda, Nicolas Cafaro La Menza, Henrique Antunes De Souza

West Central Research and Extension Center, North Platte

This study aimed to investigate the influence of water availability and nitrogen fertilization on plant growth, nutrient dynamics, and variables related to soybean crop yield. Trials were performed in Teresina, Piauí, Brazil, using randomized blocks in a split-split plot arrangement. The plots corresponded to water regimes (full and deficient), the split plots to N fertilization (0 and 1000 kg ha^-1 N-urea), and the split-split plots to harvest times of soybean plants (16, 23, 30, 37, 44, 58, 65, 79 and 86 days after emergence), with three replicates. In general, the accumulation and partitioning of nitrogen (N), phosphorus (P), potassium …

Economic Analysis Of Western Corn Rootworm Injury To Continuous Corn In Northeast Nebraska, Isadora Vercesi Bethlem

Department of Agricultural Economics: Dissertations, Theses, and Student Research

The most economically significant corn pest in the US Corn Belt is the Western Corn Rootworm (WCR), Diabrotica virgifera virgifera LeConte. This study compares a field experiment outcome of 4 different treatments against WCR, which consist of a rootworm Bt corn pyramid (SmartStax®) and non-rootworm Bt trait hybrid (VT2P), with or without the addition of the rootworm soil insecticide (Aztec®) to identify the risk-reward trade-off for each one of them. Observed prices were used for the years in the study (2020, 2021, and 2022), and low and high price scenarios were simulated for the period, to incorporate different dynamic relations …

Downstream Hydrochemistry And Irrigation Water Quality Of The Syr Darya, Aral Sea Basin, South Kazakhstan, Bagdat Satybaldiyev, Baimurat Ismailov, Nurbek Nurpeisov, Kairat Kenges, Daniel D. Snow, Arindam Malakar, Omirzhan Taukebayev, Bolat Uralbekov

Daugherty Water for Food Global Institute: Faculty Publications

New hydrochemical measurements from the Syr Darya provide insights into factors affecting the composition and quality of a major freshwater source replenishing the Aral Sea. This river is heavily used for power and irrigation and crosses territories of four Central Asia republics. It is intensely managed, draining several major tributaries, many reservoirs, and numerous irrigation distribution systems and canals. Analysis of seasonal changes in dissolved ion concentrations using geochemical diagrams, elemental ratios, statistical correlation, and equilibrium modeling allowed the characterization of mineral formation processes that control the dissolved chemical composition. Measured water hydrochemistry and composition type differs substantially from previous …

Assessment Of Rural Behavioral Characteristics In Nebraska Mental Health Professional Shortage Areas, Ruhma Khan

Community and Regional Planning Program: Theses

Since the issue of substance abuse is a concern in the United states and many of the states face the shortage of behavioural healthcare workforce, the purpose of the study is to identify how severe the issue of substance abuse is in Nebraska’s Mental Health Professional Shortage Area Counties. The research further analyses the various environmental, and family and household stresses that contribute to aggravating the issue. The objective is to categorize the counties to prioritize the areas for treatment and prevention measures. The study includes determinants associated with availability of services and facilities as well as family and household …

Wolfgang Amadeus Mozart’S The Marriage Of Figaro, Camille Lerner

Johnny Carson School of Theatre and Film: Theses, Student Research, and Creative Work

The Marriage of Figaro is generally considered to the world’s most popular operas, selling out across the world. At the University of Nebraska-Lincoln, the school of music decided to tackle the monstrous task of putting on this production, and by collaborating with the Johnny Carson School of Theatre and Film, brought in a design team that could meet the expectations, requirements, and demands of this monumental production. By working closely with collaborators, the university was able to, rather smoothly, create a moving performance that will be remembered by many.

Advisor: Jamie Bullins

Gender And Colonialism: An Intergenerational Conversation In African Literature, Khadizatul Kubra

Department of English: Dissertations, Theses, and Student Research

It is thought that African literature tends to be dominated by the masculine-oriented politics that also characterizes African public political life. In some cases, this is true, but there is a feminist movement in Africa, and many African women writers are using global feminist principles and global anti-colonial principles to write a different kind of literature. As a consequence, recent novels such as Yvonne Vera’s Nehanda (1993), set in Zimbabwe, and Petina Gappah’s Out of Darkness, Shining Light (2019), revise past, often male, African writers’ approaches to depicting the genders, even as they also criticize, implicitly or explicitly, still-widespread colonialist …

Three-Dimensional Structural Analysis Of Temple 16 And Rosalila At Copan Ruinas, Luis Tuarez

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

Temple 16 is an ancient Maya structure located at the heart of the Copán Ruinas Acropolis in Western Honduras. Temple 16 contains several earlier structures within it that were built on top of each other throughout Copán’s history. One of these earlier structures, Rosalila, is one of the most culturally significant structures within the Acropolis due to its preservation. An intricate series of archeological tunnels have been excavated throughout Temple 16 to allow for its study. However, significant cracking has been observed within Rosalila and several tunnels have experienced partial collapse. This not only poses a life safety issue for …

Anticancer Activities Of Tetra-, Penta-, And Hexacyclic Phenothiazines Modified With Quinoline Moiety., Małgorzata Jel, Beata Morak-Młodawska, Rafał Korlacki

Department of Electrical and Computer Engineering: Faculty Publications

The quinoline molecule is a chemical motif showing a highly promising pharmacological potential. Its numerous derivatives introduced into medicine revolutionized in the treatment of many entities of disease. The presence of the quinoline system in the structure of phenothiazines made it possible to obtain new aza- and diazaphenothiazine derivatives that show promising anticancer potential. The aza-analogs of the phenothiazines are structurally modified phenothiazines by the substitution of one or both benzene rings in the phenothiazine ring system with various azine rings. This approach to the strategy of obtaining new substances with biological potential can be classified as molecular hybridization methods …

An Analysis Of Factors Affecting Municipal Biochar Implementation In Voluntary Carbon Markets, Jadon Basilevac

Department of Environmental Studies: Undergraduate Student Theses

This paper serves as a review article and incorporates elements of survey research in order to identify and address factors inhibiting biochar availability from municipal sequestration projects in voluntary carbon marketplaces. In determining which barriers exist, and devising strategies for solving them, this study can help to expand the role of biochar in mitigating emissions contributing to climate change, and encourage project developers to support municipal biochar projects that provide various co-benefits. To do so, this study addresses how the pyrolysis production process might be made more efficient, economically viable, and see improved public image, the various urban sectors to …

Analyzing The Effects Of Cold Frontal Passage On The Feeding Habits Of Micropterus Salmoides (Largemouth Bass), Ethan Lang

Department of Environmental Studies: Undergraduate Student Theses

For many decades, it has been theorized as to what happens to the feeding habits of largemouth bass (Micropterus Salmoides) when a significant short term weather change occurs. Here in the midwest and all throughout the United States cold front boundaries are a weather phenomenon that occur on a regular basis. They can occur on a very large or small scale and have a rapid effect on the weather locally. These cold front systems have been looked at as one of the main drivers to having an effect on the feeding habits of largemouth. However, up until this point, any …

Heart-Stopping Rollercoasters: Restorative Practices, Motivation, And The Formation Of A Science Identity, Zachary Schafer

Department of Teaching, Learning, and Teacher Education: Theses and Other Student Research

This paper explores the crossroads between restorative practices and science education. In this crossroads, a case study between teacher and learner is explored to reveal the implications the tandem between restorative practices and education has for motivation and identity formation. The paper ends with practical suggestions for the teacher in the classroom.

Listening For Common Ground In High School And Early Collegiate Mathematics, Gail Burrill, Henry Cohn, Yvonne Lai, Dev P. Sinha, Ji Y. Son, Katherine F. Stevenson

Department of Mathematics: Faculty Publications

Solutions to pressing and complex social challenges require that we reach for common ground. Only through cooperation among people with a broad range of backgrounds and expertise can progress be made on issues as challenging as improving student success in mathematics. In this spirit, the AMS Committee on Education held a forum in May 2022 entitled The Evolving Curriculum in High School and Early Undergraduate Mathematical Sciences Education.¹ This article is a report on that forum by the authors listed above, who were among the organizers and presenters.

The Impacts Of Site Formation Processes On Excavation Methodology: The Study Of A World War Ii B-24 Crash Site In Munster, Germany, Alicia J. Lawson

Department of Anthropology: Theses and Student Research

Academic partnerships between universities and the Defense POW/MIA Accounting Agency (DPAA) are a recent development to provide top research universities resources to assist in recovering and identifying MIA service members since World War II. A University of Nebraska–Lincoln (UNL)/DPAA Partner excavation revisited a WWII B-24H crash site in Münster, Germany in the summer of 2022. B-24H [redacted] crashed into three agricultural fields on 23 March 1945. Utilizing quantitative and qualitative data collected on the incident-related and archaeological osseous remains and artifacts recovered from the fields and the fields’ land use history, this thesis focuses on analyzing the site formation processes …

Nebraska’S Medico-Legal System: A Death Investigation Analysis, Ashley Novak

Honors Program: Senior Projects (Public)

A large part of the founding of the United States of America focused on the idea of state control over their internal affairs. For this reason, the United States is home to a largely decentralized medico-legal system. The State of Nebraska hosts a coroner-based death investigation system as is written into their legislation regarding the establishment of their medico-legal system. By studying legislation, federal and state reports, as well as publications by academics within the field, merits and weaknesses of the Nebraskan coroner system can be uncovered. Additional considerations and understandings that are needed to be understood include: understanding what …

The Woodcliff Experiment: Zooarchaeological Applications Using A Legacy And Cultural Resource Management (Crm) Faunal Collection, Matthew Zmijewski

Department of Anthropology: Theses and Student Research

Legacy archaeological collections are often underutilized despite their valuable research utility. Archeologists might pass over these collections for research due to the age of recovery, along with the manner in which they were sampled and excavated. This thesis argues that significant archaeological research questions can be answered using these collections. To demonstrate their research potential, the author analyzes past subsistence behaviors and seasonality of occupations using the faunal remains from the Woodcliff site (25SD31). Woodcliff is a A.D. 1650-1750 Protohistoric Pawnee village located in eastern Nebraska. The faunal collection derived from excavations at the site constitute both a legacy and …

Analyzing The Effect Of Guided Nature Walks On Human Behavior, Jake Duffy

Department of Environmental Studies: Undergraduate Student Theses

Several studies have identified a gap in the understanding of what guided nature walks does for the individual person, and the extent to which guided nature walks and interpretive signs improves individual pro-environmental behavior and attitudes. This study surveyed over 300 people on their reactions to certain types of signs and the influence that those signs had on the individuals’ desire to return outdoors. Our results showed an overwhelmingly positive reaction to signs with ecological or systems-based information that could be utilized on their walk, while signs that taught an environmental or historical feature of that area were not appreciated …

The Decline Of Upland Birds In Nebraska: Maximizing Limited Habitat, Hunter Tesarek

Department of Environmental Studies: Undergraduate Student Theses

Ring-necked Pheasants were introduced into the United States around 150 years ago and since then have become an important species both culturally and economically. There population health is of growing concern as upland bird populations in much of the United States have been declining rapidly throughout the latter half of the last century. In Nebraska millions of acres have been transformed from habitat that benefits upland birds into row crop agriculture, mostly in the form of corn and soybeans. Rural Mail Carrier Surveys conducted for pheasants from 1960 through 2020 in comparison to change in acres harvested depict the relationship …

Program And Proceedings: Nebraska Academy Of Sciences 1880–2023, 143rd Anniversary Year, One Hundred-Thirty-Third Annual Meeting, April 21, 2023

Nebraska Academy of Sciences: Programs and Proceedings

Program

Aeronautics and Space Science

Humans Past and Present

Applied Science and Technology Section

Biology

Biomedical Sciences

Chemistry

Earth Sciences

Environmental Science

Physics

Science Education

2023 Maiben Lecture: Jason Bartz

2023 Friend of Science Award: Ray Ward and Jim Lewis

Spatiotemporal Activity Patterns Of Red Foxes And Coyotes In Wilderness Park, Lincoln, Nebraska, Adam Carlson

Department of Environmental Studies: Undergraduate Student Theses

Wildlife species that share a landscape may vary their use of time, space, and resources, thereby enabling sympatry between species. Interspecific relationships among sympatric canids are often inferred through temporal and spatial activity patterns. Body size is an important influence on interspecific relationships, as it affects competition, access to prey, resources, and vulnerability to predation. Coyotes and red foxes are canids that differ in body size and occur sympatrically in Wilderness Park, which suggests that they interact and could imply competition. In and around Lincoln, the number of coyote sightings has increased in recent years, Although the ecology of both …