Digital Commons Network^™

Forage Potential Of Summer Annual Grain Legumes In The Southern Great Plains, Gurjinder S. Baath, Brian K. Northup, Alexandre C. Rocateli, Prasanna H. Gowda, James P. S. Neel

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

Winter wheat (Triticum aestivum L.) and perennial warm-season grasses are the primary forage resources for grazing yearling stocker cattle (Bos taurus) in the US Southern Great Plains (SGP). However, low nutritive value of perennial grasses during mid to late summer limits high rates of growth by stocker cattle. In response, there has been a continued search for plant materials with the potential to provide forage high in crude protein (CP) and digestibility during August through September. A broad range of under-utilized legume species that are grown as grain crops in Africa, India, and South and Central America may have some …

Marine Threats Overlap Key Foraging Habitat For Two Imperiled Sea Turtle Species In The Gulf Of Mexico, Kristen M. Hart, Autumn R. Iverson, Ikuko Fujisaki, Margaret M. Lamont, David Bucklin, Donna J. Shaver

United States Geological Survey: Staff Publications

Effective management of human activities affecting listed species requires understanding both threats and animal habitat-use patterns. However, the extent of spatial overlap between high-use foraging areas (where multiple marine species congregate) and anthropogenic threats is not well-known. Our modeling approach incorporates data on sea turtle spatial ecology and a suite of threats in the Gulf of Mexico to identify and map “hot spots” of threats to two imperiled turtle species. Of all 820 “high” threats grid cells, our tracked turtles foraged at least 1 day in 77% of them. Although threat data were not available outside the U.S. Exclusive Economic …

Experimental Evaluation Of The Importance Of Colonization History In Early-Life Gut Microbiota Assembly, Inés Martínez, Maria X. Maldonado-Gomez, João Carlos Gomes-Neto, Hatem Kittana, Hua Ding, Robert J. Schmaltz, Payal Joglekar, Roberto Jiménez Cardona, Nathan L Marsteller, Steven W. Kembel, Andrew K. Benson, Daniel A. Peterson, Amanda Ramer-Tait, Jens C. Walter

Department of Food Science and Technology: Faculty Publications

The factors that govern assembly of the gut microbiota are insufficiently understood. Here, we test the hypothesis that inter-individual microbiota variation can arise solely from differences in the order and timing by which the gut is colonized early in life. Experiments in which mice were inoculated in sequence either with two complex seed communities or a cocktail of four bacterial strains and a seed community revealed that colonization order influenced both the outcome of community assembly and the ecological success of individual colonizers. Historical contingency and priority effects also occurred in Rag1^-/- mice, suggesting that the adaptive immune system …

Comparison Of Six Artificial Diets For Western Corn Rootworm Bioassays And Rearing, Lisa N. Meihls, Man P. Huynh, Dalton C. Ludwick, Thomas A. Coudron, B. Wade French, Kent S. Shelby, Andrea J. Hitchon, Jocelyn L. Smith, Art W. Schaafsma, Adriano E. Pereira, B. E. Hibbard

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

The western corn rootworm, Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae), is considered the most important maize (Zea mays L.) pest in the U.S. Corn Belt. Bioassays testing susceptibility to Bacillus thuringiensis Berliner (Bt) and other toxins of corn rootworm larvae often rely on artificial diet formulations. Successful bioassays on artificial diet for corn rootworm have sometimes been challenging because of microbial contamination. Toward the long-term goal of developing a universal artificial diet for western corn rootworm larvae, we compared larval survival, dry weight, and percentage of molt in 10-d bioassays from six current diets of which we were aware. In …

Nebline, September 2018

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Feature: Septic systems need regular maintenance to function properly

Food & Health

Farm & Acreage

Pests & Wildlife

Horticulture

Early Childhood

4-H & Youth

and other extension news and events

Ageing: A Sin In Nigerian Society?, Raji Abdullateef, Sunkanmi Folorunsho, Adeshina Olawale, Raji Adeyemi

Department of Sociology: Dissertations, Theses, and Student Research

Ageing can be said to be a permanent and irreparable innate process determined by a reduction in mental and equally physical status of people. Due to multiple factors, this essential process and its significance vary significantly among individuals and across cultures. The phenomenon of ageing is not attracting the attention it deserves especially in the developing countries like Nigeria. Importantly, old people in Nigeria are facing many challenges ranging from financial and economic shortcomings, socio-cultural discriminations among others. The study set out to understand the challenges and prospects of ageing in Nigeria. The theory used to explain this is the …

Wild, Native Bees And Managed Honey Bees Benefit From Similar Agricultural Land Uses, Elaine Evans, Matthew Smart, Dan Cariveau, Marla Spivak

Department of Entomology: Faculty Publications

Although both managed and unmanaged bees are important pollinators of crops and wild plants, efforts to address questions about landscapes that best support pollinators often focus on either wild pollinators or honey bees. This study examined if there was concordance between the success of wild bee communities and managed honey bee colonies at sites varying in floral availability and disturbance level in a predominantly agricultural landscape. We also determined which agricultural land uses best supported wild bee communities. The study area in the state of North Dakota in Northern Great Plains in North America is home to understudied native bee …

Exploring The Links Between Early Life And Young Adulthood Social Experiences And Men’S Later Life Psychobiology As Fathers, Mallika S. Sarma, Patty X. Kuo, Sonny Agustin Bechayda, Christopher W. Kuzawa, Lee T. Gettler

Department of Child, Youth, and Family Studies: Faculty Publications

Early life cues of environmental harshness and unpredictability have been hypothesized to influence within-species variation in the timing of life history transitions and the dynamics of reproductive strategies, such as investments in mating and parenting. It is also believed that adolescence is an influential developmental period for male reproductive strategies, with those who achieve greater social and sexual success during that period maintaining faster life history strategies into adulthood. If correct, such early life and post-pubertal experiences could also help shape the psychobiological pathways that mediate reproductive strategies, including the well-documented physiological shifts that occur when some men become parents. …

A Model For Farmer Support In Zimbabwe – Opportunity For Change, Brierly Kuhudzayi, Daniela Mettos

Cornhusker Economics

Community development refers to the collective action of a group of people to improve their quality of life or to fix a problem they face. It involves active participation by the people facing the problem. Input subsidy programs (ISPs) are commonly used in Sub-Saharan Africa as a strategy to achieve several development goals. They generally aim to improve the lives of poor subsistence-level farmers, improve agricultural output, and stimulate the economy. However, ISPs are not technically a community development tool because they are typically centrally planned and top-down in nature.

A Multi-Isotope (Δ13c, Δ15n, Δ34s, Δ2h) Approach To Establishing Migratory Connectivity In Lesser Snow Geese: Tracking An Overabundant Species, Drew N. Fowler, Elisabeth B. Webb, Frank B. Baldwin, Mark P. Vrtiska, Keith A. Hobson

Nebraska Game and Parks Commission: Staff Research Publications

Expanding populations of North American midcontinent lesser snow geese (Anser caerulescens caerulescens) have potential to alter ecosystems throughout the Arctic and subarctic where they breed. Efforts to understand origins of harvested lesser snow geese to better inform management decisions have traditionally required mark-recapture approaches, while aerial photographic surveys have typically been used to identify breeding distributions. As a potential alternative, isotopic patterns that are metabolically fixed within newly grown flight feathers following summer molting could provide inferences regarding geographic breeding origin of individuals, without the need for prior capture. Our objective was to assess potential to use four stable isotopes …

Considerations For Best Practices In Studies Of Fiber Or Other Dietary Components And The Intestinal Microbiome, David M. Klurfeld, Cindy D. Davis, Robert W. Karp, Emma Allen-Vercoe, Eugene B. Chang, Benoit Chassaing, George C. Fahey Jr, Bruce R. Hamaker, Hannah D. Holscher, Johanna W. Lampe, Andre Marette, Eric Martens, Stephen J. O'Keefe, Devin J. Rose, Maria Saarela, Barbara O. Schneeman, Joanne L. Slavin, Justin L. Sonnenburg, Kelly S. Swanson, Gary D. Wu, Christopher J. Lynch

Food for Health: Publications

Considerations for best practices in studies of fiber or other dietary components and the intestinal microbiome. Am J Physiol Endocrinol Metab 315: E1087–E1097, 2018. First published August 21, 2018; doi:10.1152/ajpendo.00058.2018.—A 2-day workshop organized by the National Institutes of Health and U.S. Department of Agriculture included 16 presentations focused on the role of diet in alterations of the gastrointestinal microbiome, primarily that of the colon. Although thousands of research projects have been funded by U.S. federal agencies to study the intestinal microbiome of humans and a variety of animal models, only a minority addresses dietary effects, and a small subset is …

Ability Of Phenolics In Isolation, Components Present In Supina Turf Grass To Remediate Candida Albicans (A72 And Sc5314) Adhesion And Biofilm Formation, Fatima Alessa

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

Candida albicans inhabits the gastrointestinal tract dormant commensal member but can become an opportunistic pathogen when the host microflora or immune system is compromised. Adhesion to a biological or synthetic surface, followed by a morphological change from the yeast to hyphae phenotype. Biofilm formation is becoming a common occurrence on types of medical devices. Because C. albicans resistant to commonly available anti-fungal drugs is increasing, innovative treatments are critically needed. Phenolic compounds are promising anti-fungal synergists. Supina grass was used as the complex matrix as it is abundant and highly sustainable source of phytochemicals even though grass cuttings are typically …

Nebline, August 2018

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Feature: Nutrition Education Kits developed by Extension help LPS students learn about nutrition and physical activity

Food & Health

Farm & Acreage

Pests & Wildlife

Horticulture

Early Childhood

4-H & Youth

and other extension news and events

Special pullout section: Lancaster County Super Fair 2018 Schedule & Map

The Relationship Of Male And Female Pastoralist Income With Household Food Security And Nutrition Status In Tanzania: Maasai, Sukuma, And Barabaig Ethnic Groups, Henriette Gitungwa

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

Although previous work provides a significant baseline for understanding the impact of gender on household decision making and resource (i.e. income and food) allocation, there are gaps in evidence for important groups, including East African pastoralists. Previous authors have noted that pastoralists’ gender roles and relations appear to be resistant to change, potentially impeding household development. This paper attempts to assess the relationship between male and female pastoralists’ income control and household food security and nutritional status in Tanzania. We use three surveys: a household-level livestock health and economics survey, a household food security survey, and an individual woman-level survey …

Assessing Adult Perceptions, Outcomes And Associations With Youth Nutrition And Activity Outcomes Of Participants In The Wecook: Fun With Food And Fitness Program, Kallie R. Heath

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Many strategies for childhood obesity prevention have included experiential cooking programs involving parents in various ways. However, evidence is lacking on parent involvement and outcomes. The WeCook: Fun with Food and Fitness (WeCook) program was a twelve-week, after-school program with a treatment-only design. The program targeted 4th and 5th grade youth at two Title I elementary schools while also engaging families in a comprehensive, multifaceted approach. Pre- and post-surveys were administered to youth and their parent/caregiver. Sixty matched youth and adult participant surveys were included in the analysis.

The primary objective was to assess whether participation in a youth cooking …

Genomic Investigation Of Beta Agonist Supplementation And Heat Stress In Livestock Species, Rachel Marie Kubik

College of Education and Human Sciences: Dissertations, Theses, and Student Research

β-adrenergic agonists (β-AA), commonly fed to cattle during the last 20-40 days of the finishing period, improve muscle growth by decreasing adipose deposition and increasing muscle accretion. In most cases, final live weights, hot carcass weight and average daily gain have all been shown to increase when β-AA are feed while fed intake, back fat, and marbling all decrease. Two β-AA, Ractopamine HCl (β1-AA) and Zilpaterol HCl (β2-AA) are currently approved for use in beef cattle in the United States. Converse to the beneficial effects of β-AA, heat stress in livestock decreases production efficiency and growth. There have also been …

Gut Symbiont Viability In Honey Bees Exposed To Agrochemical Stressors, Bryant Justin Gabriel

Department of Entomology: Dissertations, Theses, and Student Research

The honey bee gut microbiome is essential for protecting this pollinator against abiotic and biotic stressors, including the prevention of harmful gut parasites and pathogens. Previous studies have not only demonstrated a linkage of bee gut dysbiosis to increased immunodeficiencies and pathogen sensitivities, but also report the maladaptation of the gut microbiome in bees exposed to agricultural and apicultural chemistries. There are few techniques available that allow for a simple and reliable analysis of the relative proportions of live and dead gut microbes in bees exposed to these chemistries. Previous techniques for measuring gut symbiont dysbiosis are temporally limited by …

A Comparison Of Vnir And Mir Spectroscopy For Predicting Various Soil Properties, Joshua R. Gates

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

Soil plays an important role in our daily lives, namely producing food, cleaning water and storing carbon. The ability to rapidly and cost-effectively quantify the various components of soils can help us understand and better manage this important resource. This study aims to compare the ability of visible near-infrared (VNIR) spectroscopy and mid-infrared (MIR) spectroscopy to quickly and accurately predict various important soil properties (electrical conductivity, soil pH, cation exchange capacity, exchangeable cations, phosphorus, carbon, beta-glucosidase enzyme activity and nitrogen). Prediction models were developed using partial least squares regression (PLSR) techniques. Three different calibration sampling methods were tested along with …

Knowledge Of Pollinator Conservation And Associated Plant Recommendations In The Horticultural Retail Industry, Carter M. Westerhold, Samuel E. Wortman, Kim Todd, Douglas Golick

Department of Entomology: Faculty Publications

Pollinating insects are integral to the health of all terrestrial ecosystems and agriculture worldwide. Urbanization can greatly reduce nutritional resources and habitat for pollinators. However, these losses can be mitigated through targeted landscape practices, such as planting nectar- and pollen-rich plants and managing pollinator habitat in urban areas, especially home landscapes. As homeowners attempt to conserve pollinators through horticultural practices, they often seek the advice and guidance of horticulture retail employees. The knowledge horticulture employees have about pollinators and the recommendations they provide to customers is largely unknown. A nationwide survey was developed and distributed with the objectives to 1) …

Evaluation Of Growth Promoting Implant Strategies And Days On Feed On Finishing Heifer Performance And Evaluation Of Optimal Reimplant Times For Finishing Heifers And Steers, Caitlin A. Ohnoutka

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

Two experiments evaluated the effects of delayed, long-acting coated implants or uncoated implants to non-implanted heifers fed for constant or varying days on feed. In Exp. 1, heifers were implanted with either Revalor-XH on d 1, Revalor-200 on d 1, Revalor-XR on d 1, or Revalor-200 on d 70 compared to non-implanted control heifers when fed for an average of 198 d. In Exp. 2, heifers were implanted with Revalor-200 on d 1 and reimplanted with Revalor-200 on d 100, Revalor-XH on d 1, or not implanted and fed for different days on feed: 151, 165, 179, or 193. Implanting …

Effect Of Corn Silage Harvest, Hybrid, And Concentration On Performance In Growing And Finishing Beef Cattle, Fred H. Hilscher Jr.

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

Six studies were conducted to evaluate effects of corn silage harvest, hybrid, and concentration in growing and finishing diets. Experiment 1, evaluated corn silage DM (37 or 43%) and replacing corn grain with silage (15 or 45% of diet DM) in finishing diets. Experiment 2, evaluated corn silage DM (37 or 43%) and response to rumen undegradable protein (RUP) supplementation in growing diets. Experiment 3, evaluated nutrient digestibility of 37 or 43% DM corn silage at two different intakes. Experiment 4, 5, and 6 evaluated three corn silage hybrids: a standard hybrid control (CON), a brown midrib (bm3) …

Identifying Breed Effects For Cow Mature Weight, Madeline J. Zimmermann

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

Mature weight (MWT) in beef cattle has increased over the past 30 yr. In general, larger cows are costlier to maintain than smaller cows, and their profitability depends on their production environment. A wide range of beef production environments exist in the United States. There are also a variety of beef cattle breeds that can be chosen and mated to create a type of cow which will be optimally suited to excel in a given environment. However, there remains a need for tools allowing effective comparison among breeds to facilitate such decision making. Unfortunately, estimated progeny differences ( …

Evaluation Of The Interaction Of Beta-Adrenergic Agonists Supplementation And Heat Stress On Growth Performance And Carcass Composition In Feeder Lambs, Lauren Elisabeth Kett

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

Forty-nine crossbred feeder lambs (wethers, n = 49; 53.3 ± 3.7 kg BW) were utilized to evaluate the interaction of b - adrenergic agonist (bAA) supplementation and heat stress on growth performance and carcass composition. Utilizing and 3 x 2 factorial design, lambs were randomly assigned to one of three bAA supplementation: 1) Control, CON, 2) Ractopamine Hydrochloride at 40 mg/hd/d, RHCL, and Zilpaterol Hydrochloride at 2.5 mg/hd/d, ZHCL for a period of 20 d and one of two environmental conditions (Thermal Neutral: TN and Heat Stress: HS). The TN environment had a constant thermal heat index (THI) of 16.6°C. …

Agricultural Market Liberalization And Household Food Security In Rural China, Lia Nogueira, Kathy Baylis, Linlin Fan

Cornhusker Economics

Recent World Trade Organization (WTO) disputes have brought China’s agricultural trade policy back into the spotlight. In November 2008, China issued the nation’s first Outline of Medium and Long-term Plan for National Food Security (China Central People’s Government, 2008), in which they stipulate that the country will seek to stabilize the area sown to grain and achieve more than 95% grain self-sufficiency. Trade restrictions are argued to support implementing this plan because increased imports of grains and soybeans will lower prices, causing grain and soybean farmers to leave farming, thereby generating food insecurity (Wong and Huang, 2012). Others suggest that …

The Global Food-Energy-Water Nexus, Paolo D’Odorico, Kyle Frankel Davis, Lorenzo Rosa, Joel A. Carr, Davide Chiarelli, Jampel Dell’Angelo, Jessica Gephart, Graham K. Macdonald, David A. Seekell, Samir Suweis, Maria Cristina Rulli

United States Geological Survey: Staff Publications

Abstract Water availability is a major factor constraining humanity’s ability to meet the future food and energy needs of a growing and increasingly affluent human population. Water plays an important role in the production of energy, including renewable energy sources and the extraction of unconventional fossil fuels that are expected to become important players in future energy security. The emergent competition for water between the food and energy systems is increasingly recognized in the concept of the “food-energy-water nexus.” The nexus between food and water is made even more complex by the globalization of agriculture and rapid growth in food …

Identification Of Genomic Regions Contributing To Protein Accumulation In Wheat Under Well-Watered And Water Deficit Growth Conditions, Ibrahim S. Elbasyoni, Sabah M. Morsy, Raghuprakash Kastoori Ramamurthy, Atef M. Nassar

Department of Agronomy and Horticulture: Faculty Publications

Sustaining wheat production under low-input conditions through development and identifying genotypes with enhanced nutritional quality are two current concerns of wheat breeders. Wheat grain total protein content, to no small extent, determines the economic and nutritive value of wheat. Therefore, the objectives of this study are to identify accessions with high and low grain protein content (GPC) under well-watered and water-deficit growth conditions and to locate genomic regions that contribute to GPC accumulation. Spring wheat grains obtained from 2111 accessions that were grown under well-watered and water-deficit conditions were assessed for GPC using near-infrared spectroscopy (NIR). Results indicated significant influences …

Testing Global Dietary Convergence, Sri Noor Cholidah

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

Historical evidence shows that compared to Western countries, where the nutrition transition from a diet heavy in starchy staples to the modern Western diet took more than two centuries, the nutrition transition in developing countries towards Western-type diets has taken only a few decades, suggesting a trend towards global dietary convergence. This thesis explores the extent of such convergence by measuring βconvergence and σ-convergence of diets of 152 countries using FAO data on total calorie intake and calories by source from 1961-2009. Results for β-convergence show that a) countries who started in 1961 with lower calorie intake, in total or …

Nebline, July 2018

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Feature: Pretty things that sting

Food & Health

Farm & Acreage

Pests & Wildlife

Horticulture

Early Childhood

4-H & Youth

and other extension news and events

Prevascularization Of 3d Printed Bone Scaffolds By Bioactive Hydrogels And Cell Co-Culture, Mitchell Kuss, Shaohua Wu, Ying Wang, Jason B. Untrauer, Wenlong Li, Jung Yul Lim, Bin Duan

Department of Mechanical and Materials Engineering: Faculty Publications

Vascularization is a fundamental prerequisite for large bone construct development and remains one of the main challenges of bone tissue engineering. Our current study presents the combination of 3D printing technique with a hydrogel-based prevascularization strategy to generate prevascularized bone constructs. Human adipose derived mesenchymal stem cells (ADMSC) and human umbilical vein endothelial cells (HUVEC) were encapsulated within our bioactive hydrogels, and the effects of culture conditions on in vitro vascularization were determined. We further generated composite constructs by forming 3D printed polycaprolactone/hydroxyapatite scaffolds coated with cell-laden hydrogels and determined how the co-culture affected vascularization and osteogenesis. It was demonstrated …

Effects Of Structural Flaws On The Psychometric Properties Of Multiple-Choice Questions, Sarah B. Mcbrien

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

The sentiment that there is more work to be done than there is time is pervasive among faculty members at most academic institutions. At health science centers, faculty members often balancing teaching responsibilities, clinical loads, and research endeavors. Creative use of educational support staff may provide institutions an avenue for accomplishing goals related to quality improvement, curriculum revision, and accreditation tasks. One such task is the maintenance of a bank of multiple-choice examination items that are free of structural flaws. This study measured the effects of a systematic approach to revising structural flaws in multiple-choice questions on the psychometric properties …