Digital Commons Network^™

Perceptions Of Stress And Coping In Traditional Age First-Year College Students, Bridgett Grant

Department of Educational Administration: Dissertations, Theses, and Student Research

This qualitative research study examined the perceptions of stress and coping in traditional-age, first-year college students. This study sought to form an understanding of the participants’ lived experiences relating to stress and coping throughout their first semester of college. Five participants’ were separately interviewed twice for the purposes of data collection. The findings from the data analysis process showed that these first-year college students experienced stress as a result of new and challenging academic expectations while also trying to navigate interpersonal relationships. Further, participants’ in this study experienced stress as a result from interacting with social media. These traditional-age, first-year …

Pay No Attention To The Regulation Behind The Curtain: The Implications Of The Return To Title Iv (R2t4) Federal Aid Policy On Time To Degree, Apri Medina

Department of Educational Administration: Dissertations, Theses, and Student Research

Federal aid programs and their effect on student persistence, stopout, and completion have long been studied, but current literature does not fully capture the temporal nature of these programs due to insufficient methods, imprecise data, or both. Using event history methodologies, I leverage a unique level of access to data at a public four-year, research intensive university to explore how the Return to Title IV federal aid withdrawal policy, one of the most prominent yet understudied aspects of federal financial aid policies, influences time to degree. The treatment of this policy is associated with a 58.6% reduced risk (reduced conditional …

Evaluation Of Maternal Diet And Its Effect On Milk Composition And Piglet Health And Growth Performance, Shana Marie Barnett

Department of Animal Science: Dissertations, Theses, and Student Research

Both graduate research and graduate teaching duties work together to help to develop a graduate student’s skills both in the classroom and on their research experiments. Being both a GTA and GRA allows a student to form more sound hypotheses, connect better with students, and better understand their own research.

During the time as a GTA and GRA four surveys were developed to analyze different groups of students and their learning environment and two animal experiments were conducted to evaluate maternal diet and its effect on milk composition and piglet health and growth performance.

The surveys given to students consisted …

Do Lactic Acid Bacteria In Fermented Foods Persist In The Gastrointestinal Tract: An In Vitro Investigation, Chloe M. Christensen, Car Reen Kok, Robert W. Hutkins

UCARE: Research Products

It is now well established that the composition of the gastrointestinal (GI) microbiota has a profound influence on intestinal and overall health. Many contemporary diseases such as type two diabetes, IBS and obesity are associated with a dysbiotic microbiota. Therefore, researchers are interested in how diet and specific dietary components can modulate the gastrointestinal microbiota and possibly repair a dysbiotic state. One approach to improve gastrointestinal health is by consuming probiotics and prebiotics or a diet rich in fermented foods containing live microbes. Fermented foods are popular because of their enhanced preservation, safety, organoleptic, functionality, and nutritional properties. These fermented …

Zika Virus Induces Apoptosis In Retinal Pigmented Epithelial Cells, Madison Kraus, Philma Glora Muthuraj, Sathish Kumar Natarajan

UCARE: Research Products

Zika virus is a single-stranded positive sense RNA virus that attracted international attention in 2015 when an epidemic broke out in Brazil. This vector borne virus is transmitted by mosquitos and is especially concerning for pregnant women because the virus can affect the development of the fetus. One known complication is the destruction of infected retinal epithelial cells. The transduction of light is interrupted due to cell death and results in blind spots. Previous research has demonstrated that palmitoleate can reduce the observed levels of apoptosis in ZIKAV infected JEG-3 cells. We have also seen the protection of retinal pigmented …

Economic Impacts Of Food Fraud, Syed Imran Ali Meerza, Konstantinos Giannakas, Amalia Yiannaka

Cornhusker Economics

When you order seafood at a restaurant, do you get what you pay for? Scientists from Oceana, a non-profit marine conservation organization, conducted one of the largest seafood fraud investigations on 1,215 samples from 674 outlets in 21 states of the United States (U.S.) over the period 2010 to 2012.They found that there is, on average, a 33% probability that you do not actually get what you pay for. The share of mislabeled food was (a quite remarkable) 74% for seafood sold in sushi restaurants and 18% of seafood sold in gro-cery stores with mislabeled “red snapper” and “tuna” accounting …

Comparative Effects Of Technical-Grade And Formulated Chlorantraniliprole To The Survivorship And Locomotor Activity Of The Honey Bee, Apis Mellifera (L.), Jennifer R. Williams, Daniel R. Swale, Troy D. Anderson

Department of Entomology: Faculty Publications

Background: The loss of honey bee colonies is a nationally recognized problem that demands attention from both the scientific community and the beekeeping industry. One outstanding threat is the unintended exposure of these pollinators to agricultural pesticides. Anthranilic diamides, such as chlorantraniliprole, are registered for use in stone and pome fruits, vegetables, turf, and grains. There are few publicly available studies that provide an analysis of chlorantraniliprole effects on the survivorship and locomotion activity of beneficial, pollinating insects such as honey bees. The data gathered in this study provide the acute toxicity, 30-day survivorship, and locomotor activity of honey …

Arbor Day Foundation, Shoilee Rahman, Caleb Krohn, Kevin Woolworth, Kathryn Shehan, Nicholas Senior, Jairo Gamboa

Honors Program: Senior Projects (Public)

As consultants, our team’s goals are to provide the Arbor Day Foundation with ideas for future business lines and strengthen the company’s outlook moving forward. Our proposal strongly integrates the organization’s mission to inspire people to plant, nurture, and celebrate trees. Entering the birch sap water market will accomplish this task and create a plethora of opportunities for the Arbor Day Foundation. Our recommendation to ADF is to enter the birch sap market by creating licensing deals with birch sap water producers and distributors. ADF can assist these companies by offering its strong brand value, marketing expertise, and competitive advantages.

Research Tools And Their Uses For Determining The Thermal Inactivation Kinetics Of Salmonella In Low-Moisture Foods, Soon Kiat Lau

Department of Food Science and Technology: Dissertations, Theses, and Student Research

The reputation of low-moisture foods as safe foods has been crumbling over the past decade due to repeated involvement in foodborne illness outbreaks. Although various pasteurization technologies exist, a majority are thermal processes and have not been well-characterized for pasteurizing low-moisture foods. In addition, the nature of a low-moisture food matrix introduces various experimental complications that are not encountered in high-moisture foods. In this dissertation, the development, building instructions, and characterization of various open source tools for studying the inactivation kinetics of microorganisms in low-moisture foods are described. The first tool is the TDT Sandwich, a dry heating device for …

Effects Of Pesticide Residue Accumulation On Honey Bee (Apis Mellifera L.) Development And Implications For Hive Management, Jennifer Weisbrod

Department of Entomology: Dissertations, Theses, and Student Research

Honey bee (Apis mellifera L.) colonies face annual declines of 40% in the United States. Pesticides play a role in these losses. Pesticide residues picked up from the environment as well as beekeeper-applied compounds may accumulate within the hive. The effects of pesticide accumulation in comb on bee health mitigation of accumulation have not been well-studied. To examine pesticide exposure on health and development, chlorothalonil and the amitraz metabolite N-(2,4-dimethylphenyl) formamidine (DMPF), two pesticides found in hive products, were applied to brood comb. Queen bees were caged onto treated and control comb and egg laying and development were assessed. …

The Effects Of Temperature On Evacuation Rates And Absorption Efficiency Of Flathead Catfish, Zach Horstman

School of Natural Resources: Dissertations, Theses, and Student Research

Knowledge of fish gastric evacuation rates are a necessary component for both field and laboratory studies when trying to understand feeding rates, modeling energy budgets, and understanding trophic dynamics of aquatic ecosystems. Many freshwater fish encounter a broad range of environmental temperatures across life history stages, but the mechanistic link between temperature and physiological processes often remains poorly understood. We designed three recirculating aquatic systems capable of rearing Flathead Catfish Plyodictis olivaris in order to quantify gastric evacuation rates and gross energy absorption at three temperatures (17º C, 22º C and 25º C). We examined the relationship between temperature and …

Diverse Aging And Health Inequality By Race And Ethnicity, Kenneth F. Ferraro, Blakelee R. Kemp, Monica M. Williams

Department of Sociology: Faculty Publications

Although gerontologists have long embraced the concept of heterogeneity in theories and models of aging, recent research reveals the importance of racial and ethnic diversity on life course processes leading to health inequality. This article examines research on health inequality by race and ethnicity and identifies theoretical and methodological innovations that are transforming the study of health disparities. Drawing from cumulative inequality theory, we propose greater use of life course analysis, more attention to variability within racial and ethnic groups, and better integration of environmental context into the study of accumulation processes leading to health disparities.

Development Of A Sandwich Elisa Targeting Cashew Ana O 2 And Ana O 3, Morganne Schmidt

Department of Food Science and Technology: Dissertations, Theses, and Student Research

Cashew nut is the second leading tree nut allergy in the US. Cross-contact of cashew nut poses potential food safety risks for individuals with cashew allergies. Highly-processed foods, such as HTST/UHT cashew milks may lead to problems in cashew protein detection by current allergen detection methods. Therefore, the aim of this study was to develop a robust sandwich ELISA for detection of highly processed cashew proteins. Commercial cashew ELISAs were evaluated for their robustness and sensitivity in detecting cashew milk cashew protein. After unreliable results were determined, cashew Ana o 2 (11S) and Ana o 3 (2S) were semi-purified using …

A Deeper Meaning For Shallow-Level Phylogenomic Studies: Nested Anchored Hybrid Enrichment Offers Great Promise For Resolving The Tiger Moth Tree Of Life (Lepidoptera: Erebidae: Arctiinae), Nicolas J. Dowdy, Shannon Keating, Alan R. Lemmon, Emily M. Lemmon, William E. Conner, Clare H. Scott Chialvo, Susan Weller, Rebecca B. Simmons, Melissa S. Sisson, Jennifer M. Zaspel

Department of Entomology: Faculty Publications

Anchored hybrid enrichment (AHE) has emerged as a powerful tool for uncovering the evolutionary relationships within many taxonomic groups. AHE probe sets have been developed for a variety of insect groups, though none have yet been shown to be capable of simultaneously resolving deep and very shallow (e.g., intraspecific) divergences. In this study, we present NOC1, a new AHE probe set (730 loci) for Lepidoptera specialized for tiger moths and assess its ability to deliver phylogenetic utility at all taxonomic levels. We test the NOC1 probe set with 142 individuals from 116 species sampled from all the major lineages of …

The Role Of Conformational Dynamics In Isocyanide Hydratase Catalysis, Medhanjali Dasgupta

Department of Biochemistry: Dissertations, Theses, and Student Research

Post-translational modification of cysteine residues can regulate protein function and is essential for catalysis by cysteine-dependent enzymes. Covalent modifications neutralize charge on the reactive cysteine thiolate anion and thus alter the active site electrostatic environment. Although a vast number of enzymes rely on cysteine modification for function, precisely how altered structural and electrostatic states of cysteine affect protein dynamics, which in turn, affects catalysis, remains poorly understood.

Here we use X-ray crystallography, computer simulations, site directed mutagenesis and enzyme kinetics to characterize how covalent modification of the active site cysteine residue in the enzyme, isocyanide hydratase (ICH), affects the protein …

Edible Films Made Of Corn Zein Protein And Cellulose Derivatives, Gloria Dukuzeyesu, Changmou Xu, Zhang Yue

UCARE: Research Products

A composite edible film made of corn zein protein (Z) and cellulose derivatives (C) was successfully fabricated. Edible films are coatings used to wrap food products to protect them against microbial deterioration, loss of moisture, and to extend the shelf life of the product. These edible films are consumed together with the product . The mechanical properties, water vapor permeability, application on fruits, and shelf life of the composite film were studied. Zein demonstrated excellent packing characteristics; due to its high no polar contents and hydrophobic nature, zein film served as a moisture barrier. Hydroproxy methylcellulose (HPM) is tasteless, odorless …

Structure, Function And Metabolism Of Hepatic And Adipose Tissue Lipid Droplets: Implications In Alcoholic Liver Disease, Sathish Kumar Natarajan, Karuna Rasineni, Murali Ganesan, Dan Feng, Benita L. Mcvicker, Mark A. Mcniven, Natalia A. Osna, Justin L. Mott, Carol A. Casey, Kusum K. Kharbanda

School of Veterinary and Biomedical Sciences: Faculty Publications

For more than 30 years, lipid droplets (LDs) were considered as an inert bag of lipid for storage of energy-rich fat molecules. Following a paradigm shift almost a decade ago, LDs are presently considered an active subcellular organelle especially designed for assembling, storing and subsequently supplying lipids for generating energy and membrane synthesis (and in the case of hepatocytes for VLDL secretion). LDs also play a central role in many other cellular functions such as viral assembly and protein degradation. Here, we have explored the structural and functional changes that occur in hepatic and adipose tissue LDs following chronic ethanol …

Effects Of A Vitamin And Mineral Bolus On Beef Heifer Feedlot Performance, Feeding Behavior, Carcass Characteristics, And Liver Mineral Concentrations, Kacie L. Mccarthy, Sarah R. Underdahl, Carl R. Dahlen

Department of Animal Science: Faculty Publications

Crossbred beef heifers (n = 23; initial body weight [BW] = 370 ± 12 kg) housed at the North Dakota State University Beef Cattle Research Complex in Fargo, North Dakota, were used to evaluate the effects of a 250-d slow-release vitamin and mineral bolus on feedlot performance, feeding behavior, carcass characteristics, and liver mineral concentrations. Heifers were assigned to one of two treatments: 1) received no supplemental mineral or vitamin (CON, n = 12 or 2) received two boluses on day 0 (minimum of 3,740 mg Ca, 16,456 mg Mg, 112 mg Na, 11,220 mg Cu, 2,995 mg I, …

Honeybee Microbiome Is Stabilized In The Presence Of Propolis, Perot Saelao, Renata S. Borba, Vincent Ricigliano, Marla Spivak, Michael Simone-Finstrom

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

Honeybees have developed many unique mechanisms to help ensure the proper maintenance of homeostasis within the hive. One method includes the collection of chemically complex plant resins combined with wax to form propolis, which is deposited throughout the hive. Propolis is believed to play a significant role in reducing disease load in the colony due to its antimicrobial and antiseptic properties. However, little is known about how propolis may interact with bee-associated microbial symbionts, and if propolis alters microbial community structure. In this study, we found that propolis appears to maintain a stable microbial community composition and reduce the overall …

Center For Grassland Studies, Volume 26, Issue 1, Spring 2020

Center for Grassland Studies: Newsletters

GPS Tracking to Understand Cattle Grazing

Director's Column

Listening Sessions Encourage Stakeholder Input

Sustaining Nebraska’s Grasslands

Cedar Management Meeting: April 3

Alumni Update: Ethan Freese, Master of Applied Science Candidate

Nebraska Grazing Conference: August 10-12, 2020

Students Test Prairie Restoration Methods for Joint Prairie Corridor Project

Nebraska Range Short Course: Register by May 15

Martin and Ruth Massengale Honored with Tribute Wall

Kenyan’s Tour Rangelands of Western Nebraska

GRLS Club Continues Growth

Range Club Earns Awards

Nebraska Ranch Practicum: Register by May 1

Opportunities Abound at PGA Merchandise Show

2019 Jones Cup Recap

Alumni Update: Austin Holliday, Manager, UNL Cow/Calf …

Gamma Sigma Delta, Nebraska Chapter Newsletter, Issue #59 2020

Gamma Sigma Delta, Nebraska Chapter: Newsletters

In this issue:

Important dates

President's message, Paul Hay

2019 Nebraska Chapter awards: The Honor Society of Agriculture, Gamma Sigma Delta

Award of Merit recipients: Archie Clutter, Dave Vetter, Lena Luck, Suat Irmak, Angela Pannier, Sajjan Grover (Joe Louis), (Ethann Barnes, Jordan Reinders), Jayden Garrett (Daniel Gertner, Alexander Kemnitz, Trevin Ball, Kristi Patterson, Robert Gabel, Abigail Haworth), Abigail Haworth, Sydney Kimnach (Payton Flower, Kayla Johnson, Tori Pedersen).

New members inducted into the Nebraska Chapter

Gamma Sigma Delta committees 2020 (Executive: President: Paul Hay, President-Elect: TBD, Secretary/Treasurer: Dennis Brink, Membership Coordinator: Bob Wright, Historian Dana W. R. Boden, Past-President: Gary Brewer) …

"The Wonderful World Of Dr. Seuss Club", Meagan Heimbrecht, Charlie Croteau, Kylee Sodomka

Honors Program: Expanded Learning Clubs

Exploring the world through Dr. Seuss! A club geared for young elementary schoolers in hopes of promoting reading and curiosity! From Oobleck to puppets to writing their own book, this club is simple yet takes a student on a new adventure every week!

French Club, Brett Foster, Madisen Bell

Honors Program: Expanded Learning Clubs

Afterschool club that introduces French Language and Culture to young elementary students. Through hands-on activities and discussions, students will learn the basics of French Language and complete a French Journal full of everything they learned that semester to take home.

Pen Pal Club: Handwriting And Fine Motor Development, Madelyn Beck, Nicole Borcyk

Honors Program: Expanded Learning Clubs

This "Pen Pal Club" targets K-2 students. The lesson plans provided aim to develop handwriting, letter formation, and fine motor skills to create confident and competent young writers who can excel in the classroom.

Escape The Classroom Club, Abbey Haymond, Jasmine Ranjbari-Sisan

Honors Program: Expanded Learning Clubs

This after school club encourages students to work together to solve puzzles and find clues. By using critical thinking skills and creativity, they will escape the classroom as a team.

Environmental Activism, Ellen Dexter, Lydia Dexter

Honors Program: Expanded Learning Clubs

An after school book club that follows Greta Thunberg's book of speeches No One is Too Small to Make a Difference , as well as uses hands-on activities to teach the importance of environmental activism.

Got Science? Club, Nora Husein, Randa Ismail

Honors Program: Expanded Learning Clubs

Got Science? Club allows students to learn about the science that can be found in our daily lives using everyday items such as food and school supplies. Students will learn about these sciences through hands-on experiments, allowing them to truly experience the science around them.

Basics Of Stepping Club, Hana Pham, Yara Madit

Honors Program: Expanded Learning Clubs

Originating in West Africa in the 1500s, step has since evolved into a form of dancing that places emphasis on rhythmic movements and high energy. It is commonly used amongst greek organizations and within schools. This club introduces stepping to older children through activities such as stamina, focus, teamwork, and problem solving.

Lego Robotics Club, Keith Tran

Honors Program: Expanded Learning Clubs

An after school club focused on problem solving and computational thinking using LEGO Mindstorm EV3.

Stories That Shape Us, Lauren Dubas

Honors Program: Expanded Learning Clubs

This club is a Mythology Club that explores popular greek myths through fun and interactive activities. These actives are designed with 4th and 5th graders in mind, and are meant to provide an interesting way to interact with the mythology material presented during each lesson. The lessons do not build off of one another, and can be used in any order and still retain understanding of that myth.