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Determining Forage Intake Of Nursing Calves Grazing Native Sandhills Rangeland, Jennifer A. Walker

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

Effective management of grazing lands is important for longevity and productivity. Accurate calculations of stocking rates per animal unit will aid in long term sustainability. Calculating stocking rates for cattle can prove challenging for cows and nursing calves. Limited research has been conducted to determine forage intake of the nursing calf pre-weaning. The objective of Trial 1 was to determine nursing calf forage intake over time until weaning. Trial 1 used 8 crossbred cow-calf pairs in experiment 1 and 12 pairs in experiment 2. Pairs were separated into two groups rotating between grazing upland range or housed in individual pens …

Cc301 Agriculture And Food Act Of 1981 : A Summary Of The Major Provisions With Comments And Interpretation By A. L. Frederick, A. L. Frederick

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 301 includes information about the Agriculture and Food Act of 1981, regarding a summary of the major provisions with comments and interpretation.

Cc302 Fact Sheet

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 302: The contains facts about citizens, purpose, and sources of funds in Nebraska.

Cc302 Revised No Date Fact Sheet

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 302 Revised with no date contains facts about the purpose, structure, funding, and activities of the University of Nebraska Cooperative Extension

Cc299 Strategies For Family Living

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 299 contains strategies for family living and of the Extension Home Economics program.

Cc299 Revised No Date "Making A Difference"

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 299 Revised with no date discusses Making a difference.

Cc269 Extension Home Economics....Helping Nebraska Families Live And Learn With Change

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 269 discusses helping Nebraska families live and learn with change.

Investigating Antibiotic Resistance Levels Of Salmonella Internalized In Lettuce Leaves, Jason B. Thomas

McNair Scholars Research Journal

Contamination of food crops by the human pathogen Salmonella is a food safety threat worldwide. Though using treated wastewater for irrigation is a sustainable practice, it may introduce trace levels of Salmonella that may contaminate food crops. Salmonella could develop resistance to antibiotics present in wastewater. The overall goal of the project is to increase the understanding of the public health risk associated with the use of treated wastewater to irrigate food crops. The objective of this particular study is to determine the antibiotic resistance level of Salmonella internalized in lettuce leaves. In this experiment, thirty-six plants of the lettuce …

Nebline, May 2014

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Feature: The Cost of Invasive Species

Food & Health

Family Living

Farm & Acreage

Home & Family Living

Horticulture

Pests & Wildlife

4-H & Youth

Extension Calendar

and other extension news and events

Effects Of Distillers Grains Plus Solubles And Monensin Supplementation On Yearlings Grazing Smooth Bromegrass, Tyler L. Hasenauer

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

Supplementing cattle on grass is an effective way of increasing animal efficiency and grass utilization. Distiller grains plus solubles (DGS) supplementation has been repeatedly proven as an effective supplement by providing ruminally undegradable protein (RUP), fat, and highly digestible fiber. The effects of monensin supplementation on grazing cattle are variable. Although some research has shown a decrease in forage organic matter intake (FOMI), the popular belief is monensin increases ADG while maintaining DMI in a grazing situation. Two experiments were designed to observe the effects of DGS and monensin supplementation on cattle grazing smooth bromegrass. In the first study, ADG …

Genomic Predictions For Age At Puberty And Reproductive Longevity In Sows Using Bayesian Methods, Katherine Lindsay Lucot

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

Including marker-assisted selection in breeding programs is potentially more efficient than traditional selection for improving traits that are expensive or difficult to measure. One of the challenges of genomics is the lack of robustness of marker effects across populations and over time (generations) and the cost to commercial producers of high-density arrays. The objective of this study was to analyze differences in the proportion of phenotypic variation explained by different fractions of major 1 Mb windows and SNPs. Using a population of Nebraska Index Line and commercial Large White x Landrace females (n = 1,234) generated in 11 batches, …

Visual Analysis And Design Proposal For The Bridges Organization Day Facility In Rockledge, Florida, Lesa N. Lorusso

Architecture Masters of Science Program: Theses

The population by age of the client and staff at the Bridges Facility in Rockledge, Florida represent a microcosm of the population of Brevard County, Florida. The shared history of two non-profit organizations that began in in Brevard County, FL in the mid twentieth century is remarkable. NASA began in 1958, and the Bridges organization began in 1956. The historically significant American community of Brevard County, FL now faces the challenges of a new focus without the NASA space shuttle program and accommodating an increasingly aging population, while the similarly aged Bridges organization faces similar organizational and population challenges as …

College Students’ Use Of Farmers’ Markets In Lincoln, Nebraska, Amber Reinkordt

Department of Environmental Studies: Undergraduate Student Theses

The purpose of this study is to develop an understanding of college students’ use of local farmers’ markets in Lincoln, Nebraska and the barriers that prevent college students from attending farmers’ markets, and noting the incentives that could motivate them to attend.

Currently there are no research articles about college students and their attendance at farmers' markets. There are, however, articles pertaining to getting students on the farm, school gardens, low income families and making farmers' markets more accessible and affordable, health benefits for customers who shop locally, and environmental, economic, and societal benefits of local farm operations.

Use Of Distiller Grains In Alternative Beef Heifer Systems, Jared M. Mracek

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

Every year, producers select replacement heifers with the intention that these heifers are the future of their cow herd. Producers normally select replacement heifers at weaning based on weight and structure. When selecting heifers at weaning, producers risk not selecting heifers that would be productive cows based on their criteria. By delaying the selection of replacements, it will allow producers to increase the opportunity to thoroughly evaluate replacement prospects. The corn dry-milling industry produces byproducts that can be economical supplements to growing cattle on forage. An experiment evaluated an alternative heifer system utilizing distiller grains as an energy source to …

The Effects Of Feed Additives, Housing Systems, And Stress On Salmonella Shedding In Single Comb White And Brown Laying Hens, Dana L. Hahn

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

A series of studies were conducted examining feed additives, housing systems and stress on Salmonella shedding. Alternative feed additives such as prebiotics, probiotics and essential oils have been shown to reduce pathogenic bacteria colonization. Furthermore, stressors such as movement have been shown to increase Salmonella shedding. The goal of the studies was to examine if alternative ingredients reduce Salmonella shedding in alternative housing systems and through movement stress. Study 1 examined cage and cage-free housing with mannan oligosaccharide (MOS) supplementation. Treatments were arranged in a 2x2 factorial design: cage or cage free; MOS (0% or 0.08%). There was no effect …

Diversity And Ecology Of Host-Seeking Mosquitoes In Irrigated Agro-Ecosystems Of Clay County, Nebraska, Alister K. Bryson

Department of Entomology: Dissertations, Theses, and Student Research

In the United States, Nebraska has the third highest incidence of human West Nile virus (WNV). Since WNV was first detected in the state in 2002, 3,422 confirmed cases and 57 deaths have been reported. Irrigated agro-ecosystems, which have been associated with elevated WNV incidences in other states, are prevalent in Nebraska. The objectives of this investigation were to 1) characterize mosquito abundance and diversity in irrigated agro-ecosystems, and 2) evaluate associations of two primary vectors of WNV, Culex tarsalis and Culex pipiens, with irrigation methods (sprinkler vs. surface) and crop type (corn vs. soybean). Investigations were conducted …

Mechanisms Of Differential Toxicity Between Honey Bee (Apis Mellifera L.) Castes With An Emphasis On Coumaphos, Lizette Dahlgren

Department of Entomology: Dissertations, Theses, and Student Research

Acaricides are used to treat honey bee (Apis mellifera L.) colonies to control the parasitic Varroa mite (Varroa destructor Anderson & Trueman), a worldwide threat to honey bee health. As such, these compounds act as drugs to mitigate bee losses but may also stress the bees. This dissertation quantifies differences between queen and worker tolerance of five acaricides and clarifies the honey bee mechanism of tolerance for coumaphos. Selected acaricides were topically applied to adult queen and worker bees to generate dose-response curves and LD₅₀s. Twenty-four hours after treatment, queens were 3-times more tolerant of tau-fluvalinate …

Pectin From Apple Pomace: Extraction, Characterization, And Utilization In Encapsulating Alpha-Tocopherol Acetate, Lucia G. Miceli-Garcia

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

Pomace is the main byproduct from apple juice and cider industry. Valuable compounds, such as pectin, can be obtained from apple pomace. Despite the wide utilization of pectin in the food industry, the available knowledge on the complicated extraction process and chemistry of pectin is limited. Pectin is a versatile food ingredient that can be utilized in the development of functional food ingredients. This research covers two main areas of importance on the production and utilization of pectin. The first study was aimed at optimizing process conditions for the acid extraction of pectin from apple pomace. Three extraction factors (hot …

Starch-Pectin Matrices For Encapsulation Of Ascorbic Acid, Yiwei Liu

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

Starch and pectin are two food-grade carbohydrates widely utilized in the food industry. Starch and pectin polymers have been investigated in encapsulating functional food ingredients and in pharmaceutical applications. Resistance to enzyme hydrolysis, differential solubilities, depending on the pH, and the ability to ‘protect’ unstable molecules are considered some of the beneficial properties of starch and pectin polymers, for encapsulation applications. Food ingredients could be delivered in a controlled manner to a specific target by encapsulating in micro-scale particles, i. e., microencapsulation. Two studies were conducted to investigate the ability of selected starch-pectin blends in microencapsulating ascorbic acid (vitamin C) …

Development Modeling Of Lucilia Sericata And Phormia Regina (Diptera: Calliphoridae), Amanda L. Roe

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

The relationship between insect development and temperature has been well established and has a wide range of uses, including using blow flies for postmortem (PMI) interval estimations in death investigations. To use insects in estimating PMI, we must be able to determine the insect age at the time of discovery and backtrack to time of oviposition. Unfortunately, existing development models of forensically important insects are only linear approximations and do not take into account the curvilinear properties experienced at extreme temperatures. A series of experiments were conducted with two species of forensically important blow flies (Lucilia sericata and Phormia …

Peer Health Teaching Improves Nutrition Behaviors In The Teen Teacher Population, Ashlie Smith

Department of Nutrition and Health Sciences: Dissertations, Theses, and Student Research

Peer teaching is a promising model of health education. Limited research exists on the topic of the effectiveness of peer health teaching, and even less research exists on the effects on the actual peer teachers, notably their motivations for becoming peer teachers as well as behavioral modifications and improved self-efficacy made as a result. This study examined the motivations and the health behavior modifications made by 4-H Eat 4-Health teen teachers ages 14 to 17 after delivering a peer health education program. This study investigated teen teachers’ nutrition and physical activity behavior changes as well as their leadership and confidence …

A Regional Investigation Of In-Season Nitrogen Requirement For Maize Using Model And Sensor-Based Recommendation Approaches, Laura Joy Stevens

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

N management for corn can be improved by applying a portion of the total N during the growing season, allowing for adjustments responsive to actual field conditions. This study was conducted to evaluate two approaches for determining in-season N rates: Maize-N model and active crop canopy sensor. Various sensor algorithms designed for making in-season N recommendations from crop canopy sensor data were evaluated. The effects of corn hybrid and planting population on recommendations with these two approaches were considered. In a 2-yr study, a total of twelve sites were evaluated over a 3-state region, including sites in Missouri, Nebraska, and …

Plasticity In Female Mate Choosiness: A Result Of Variation In Perceived Predation Risk And The Interaction Of Female Age And Male Density, Ashley N. Atwell

School of Biological Sciences: Dissertations, Theses, and Student Research

In many species, female mate choices can be a strong source of sexual selection. Females often prefer a certain male phenotype, and this can be due to benefits females gain from mating with preferred males. However, such benefits can sometimes be outweighed by the cost of searching for a preferred male. These costs and benefits often change concomitantly with changes in environmental (e.g., predator abundance and conspecific density) and internal factors (e.g., female age). Thus, female mate choosiness (the degree to which preferences for certain males are expressed) should often be plastic. Plasticity in female mate choosiness may be complicated …

Investigations Into Sensory Ecology And Gene Evolution Of The Pea Aphid (Acyrthosiphon Pisum), Swapna R. Purandare

School of Biological Sciences: Dissertations, Theses, and Student Research

Organisms use environmental cues to gather information required to perform activities that are essential for their survival and reproduction, such as searching for food, avoiding danger, and finding mates. They respond to the acquired information by changing their behavior or physiology, which may result in increased fitness. Due to the fundamental importance of information in an organism’s life, it is important to understand its acquisition, processing, and the organism’s response to it. In the work presented here, we used the pea aphid (Acyrthosiphon pisum), an insect that produces multiple phenotypes, or morphs, that are genetically identical, but differ …

Stacking Of A Stearoyl-Acp Thioesterase With A Dual-Silenced Palmitoyl-Acp Thioesterase And Δ12 Fatty Acid Desaturase In Transgenic Soybean, Hyunwoo Park, George L. Graef, Yixiang Xu, Patrick Tenopir, Thomas E. Clemente

Department of Agronomy and Horticulture: Faculty Publications

Soybean (Glycine max (L.) Merr) is valued for both its protein and oil, whose seed is composed of 40% and 20% of each component, respectively. Given its high percentage of polyunsaturated fatty acids, linoleic acid and linolenic acid, soybean oil oxidative stability is relatively poor. Historically food processors have employed a partial hydrogenation process to soybean oil as a means to improve both the oxidative stability and functionality in end-use applications. However, the hydrogenation process leads to the formation of trans-fats, which are associated with negative cardiovascular health. As a means to circumvent the need for the hydrogenation process, genetic …

Cc269 Extension Home Economics...Helping Nebraska Families

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 269: This circular is about helping Nebraska families live with change.

Cc260 How Much Vitamin A Are You Eating?, Harriet Kohn

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 260: This circular is about how much vitamin A you are eating, how it helps your body, how much you need in each day. Also, what things/ food have vitamin A in them.

Precautionary Labelling Of Foods For Allergen Content: Are We Ready For A Global Framework?, Katrina J. Allen, Paul J. Turner, Ruby Pawankar, Steve Taylor, Scott Sicherer, Gideon Lack, Nelson Rosario, Motohiro Ebisawa, Gary Wong, E. N. Clare Mills, Kirsten Beyer, Alessandro Fiocchi, Hugh A. Sampson

Department of Food Science and Technology: Faculty Publications

Food allergy appears to be on the rise with the current mainstay of treatment centred on allergen avoidance. Mandatory allergen labelling has improved the safety of food for allergic consumers. However an additional form of voluntary labelling (termed precautionary allergen labelling) has evolved on a wide range of packaged goods, in a bid by manufacturers to minimise risk to customers, and the negative impact on business that might result from exposure to trace amounts of food allergen present during cross-contamination during production. This has resulted in near ubiquitous utilisation of a multitude of different precautionary allergen labels with subsequent confusion …

Cc207 Emergency Flood Information

University of Nebraska-Lincoln Extension: Historical Materials

Campaign Circular 207 includes much useful information for what to do in case of a flood. It contains several previously printed circulars on this topic. It gives contact information for services that may be needed.

Erratum To ‘‘Associations Of Cardiorespiratory Fitness And Fatness With Metabolic Syndrome In Rural Women With Prehypertension’’, Patricia A. Hageman, Carol H. Pullen, Melody Hertzog, Linda Boeckner, Susan Noble Walker

Department of Nutrition and Health Sciences: Faculty Publications

In the original paper, the authors discovered a computer coding error that resulted in 33 of the women’s ages being incorrectly recorded. All analyses were repeated for this paper using the corrected age dataset, as all our logistic regression analyses in the published paper were adjusted for age.The repeated analyses, using the corrected dataset, lead to minor changes that needed to be reported to the results in the published paper. These corrections did not change the conclusion of the published paper.The authors apologize for any inconvenience.