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Articles 5041 - 5070 of 7189
Full-Text Articles in Entire DC Network
Herbicide Resistance Mechanism(S) In Italian Ryegrass (Lolium Perenne Ssp. Multiflorum) Populations In The Southern United States, Reiofeli Algodon Salas
Herbicide Resistance Mechanism(S) In Italian Ryegrass (Lolium Perenne Ssp. Multiflorum) Populations In The Southern United States, Reiofeli Algodon Salas
Graduate Theses and Dissertations
Italian ryegrass is a principal weed problem in wheat production fields in the Southern US. Resistance to herbicides diclofop, mesosulfuron, and pinoxaden among ryegrass populations has been reported. Glyphosate-resistant Italian ryegrass populations were identified in Desha County, Arkansas. This research aimed to 1) determine resistance patterns to ACCase (diclofop and pinoxaden) and ALS (imazamox, mesosulfuron, and pyroxsulam) herbicides among Italian ryegrass populations from the southern US; 2) determine if cytochrome P450-mediated enhanced herbicide metabolism contributed to resistance; and 3) elucidate the resistance mechanism to glyphosate in four Arkansas populations (Des03, Des05, Des14, and D8). For objective 1, 30 accessions from …
Nutrient Dynamics In Stormwater Runoff From Green Roofs With Varying Substrate, John Michael Fohner
Nutrient Dynamics In Stormwater Runoff From Green Roofs With Varying Substrate, John Michael Fohner
Graduate Theses and Dissertations
One major concern with urban development is the increasing amount of stormwater runoff from large expanses of impervious surfaces. These impervious surfaces reduce the ability of stormwater to infiltrate into the soil and eventually groundwater, which leads to greater amounts of surface runoff. Green technology serves as a viable solution to many of the environmental problems presented by modern development. Fifteen mock, extensive green roofs were built in the fall of 2008 at the Watershed Research and Education Center in Fayetteville, Arkansas. The goals of this project were to (1) measure the amount of stormwater runoff from varying treatments and …
Chinese International Students' Cross-Cultural Adaptation And Online Communication, Chen Wei Wu
Chinese International Students' Cross-Cultural Adaptation And Online Communication, Chen Wei Wu
Graduate Theses and Dissertations
This study explored Chinese international students' computer mediated communication with both Americans and Chinese during their studying in the U.S. based on a Cross-Cultural Adaptation theory. The specific purpose of this study was to test five theorems of the theory with a sample of Chinese international students and to explore how Chinese international students' intercultural transformation, adaptive personality, host communication competence, and their interpersonal and mass communication with both host and ethnic groups associate together.
Effects Of Respiratory Vaccination Timing And Hormonal Growth Implant On Health, Performance, And Immunity Of Newly Received Stocker Calves, Kimberly Denise Poe
Effects Of Respiratory Vaccination Timing And Hormonal Growth Implant On Health, Performance, And Immunity Of Newly Received Stocker Calves, Kimberly Denise Poe
Graduate Theses and Dissertations
Stress alters the immune system and vaccination during this time may reduce vaccine response; whereas, growth implants may shift metabolism to enhance tissue deposition in exchange for energy required for immune response during bovine respiratory disease (BRD) challenge. This study was conducted to determine the effects of pentavalent respiratory vaccination timing with or without a hormonal growth implant on arrival (d 0) on health, performance, complete blood count, and vaccine response in high&ndashrisk, newly received stocker calves during a 42&ndashd receiving period. Crossbred bull and steer calves (n = 385) were weighed (initial BW = 202 ± 4.1 kg), stratified …
Role Of Lactic Acid Bacteria As A Bio-Sanitizer To Prevent Attachment Of Listeria Monocytogenes On Deli Slicer Contact Surfaces, And The Influence Of Listeria Innocua On The Attachment Of L. Monocytogenes On Selected Materials Located In The Food-Processing Environment, Jean Baptiste Ndahetuye
Graduate Theses and Dissertations
Listeria monocytogenes an important foodborne pathogen that continues to be a serious problem for the food industry. This pathogen contaminates food primarily during post-harvest in the food-processing environment. Its ecology in the food-processing environment is not well understood but previous research has demonstrated the ability of L. monocytogenes to survive on food contact surfaces after cleaning and disinfection. The current study explored the attachment of three lactic acid bacteria (LAB) strains, Lactobacillus animalis , Lb. amylovorus and Pediococcus acidilactici , their combination in a cocktail, and their influence to prevent the attachment of L. monocytogenes at room temperature by examining …
Chitosan Reduces Water Solubility Of Phosphorus In Poultry Litter, Iain M. Bailey
Chitosan Reduces Water Solubility Of Phosphorus In Poultry Litter, Iain M. Bailey
Biological and Agricultural Engineering Undergraduate Honors Theses
The addition of chemical amendments to land applied poultry litter is paramount to the maintenance of acceptable phosphorus (P) and nitrogen (N) levels in stormwater runoff from pasture. Chitin is the chief component of shrimp shells, and together with its more processed form chitosan, may show promising P, N, and metal ion chelation characteristics by virtue of its chemical structure and unique charge distribution. The objective of this study was to measure the effects of aluminum sulfate (alum, Al2(SO4)3) on aqueous solubility of P and ammonia (NH3) release against those of chitin and three varieties of chitosan in poultry litter. …
Kinetics Of Xylose Oligomers Decomposition, Christopher Mcdaniel
Kinetics Of Xylose Oligomers Decomposition, Christopher Mcdaniel
Biological and Agricultural Engineering Undergraduate Honors Theses
Hemicellose-derived oligomers are key components in hemicellulose depolymerization into the five-carbon carbohydrate xylose, a key operation in the production of cellulosic biofuels. Unfortunately, hemicellulose oligomers do not only depolymerize directly into xylose, but also into degradation compounds that reduce the overall production of cellulosic biofuels. Because commercially available oligomers are prohibitively expensive, this study was carried out using relatively inexpensive commercial grade xylose. Understanding the degradation of xylose is important for its impact on the economic viability of the monomeric sugars-to-ethanol conversion. From experimental data and ensuing statistical analysis, initial xylose concentrations did not result in different xylose degradation rates, …
Formation Of Embryoid Bodies From Human Embryonic Stem Cells In Defined Medium, Ashley Kiene
Formation Of Embryoid Bodies From Human Embryonic Stem Cells In Defined Medium, Ashley Kiene
Biological and Agricultural Engineering Undergraduate Honors Theses
Embryonic stem cells have the characteristic of self-renewal and the ability to differentiate into tissues from all three germ layers. Many times, the first step in using human embryonic stem cells for regenerative medicine is often initiated by embryoid body (EB) formation. EBs are three-dimensional multicellular aggregates that resemble early post implantation embryos that still maintain the potential to form the three germ layers. Currently, generating EBs from human embryonic stem cells (hESC) that are adapted to feeder-independent medium is difficult, much more so than feeder cultured hESC. Using a chemically defined medium would not only help the application of …
Evaluation Of Biocomposite For Implementation As Prosthetic Socket, Chelsea Long
Evaluation Of Biocomposite For Implementation As Prosthetic Socket, Chelsea Long
Biological and Agricultural Engineering Undergraduate Honors Theses
According to the World Health Organization, 0.5% of the population in developing countries is in need of prostheses or orthoses. For this population, obtaining a prosthetic is made difficult due to medical and transportation costs as well as a general lack of area resources. One possible solution to these problems would be to design a prosthetic socket from an inexpensive biodegradable material that could be produced in developing countries. One such material has been developed by Ecovative Design, LLC. Ecovative’s technology grows mycelium, mushroom roots, throughout a plant fiber matrix. Ecovative products are completely biodegradable and made naturally from local …
Study Of The Fundamental Chemical And Physical Interactions Between Chitosan And Hydroxyapatite, Abigail Washispack
Study Of The Fundamental Chemical And Physical Interactions Between Chitosan And Hydroxyapatite, Abigail Washispack
Biological and Agricultural Engineering Undergraduate Honors Theses
Hydroxyapatite and chitosan are widely used in biomedical applications due to their biocompatibility and biodegradability. Various studies show that composites made of hydroxyapatite and chitosan exhibit desirable properties for applications in bone tissue engineering. When creating a composite it is important to understand the interfacial chemistry and physical interactions between the composite materials. An understanding of these properties gives more insight into the resulting structure of the composite on multiple levels (nano- micro- macro). This structure affects the chemical, physical, and mechanical properties of the material, thus analysis of these properties gives a better understanding of how a material will …
Multifunctionality In U.S. Rice Production: A Logit Analysis In Farmers Participation, Juan Tur Cardona
Multifunctionality In U.S. Rice Production: A Logit Analysis In Farmers Participation, Juan Tur Cardona
Graduate Theses and Dissertations
Multifunctional agriculture is particularly fundamental to some working lands conservation policies and programs, such as the Environmental Quality Incentive Program (EQIP), Conservation Security Program (CSP) and Wildlife Habitat Incentive Program (WHIP). Farmers can also be engaged in providing recreational and agri-tourism services such as hunting, fishing, bird-watching, farm tours, petting zoos and hospitality services. Using the Agricultural Resource Management Survey (ARMS) we analyze factors associated with participation in conservation, recreation and agri-tourism activities as a function of farm structure, farm financial measures, production practices, and socio-demographic characteristics of the farm operator. To estimate the functional relationships we estimate a binary …
Faculty And Staff Perceptions Of Sustainability Initiatives On Three Arkansas Two-Year College Campuses, Kenneth Ray Warden Iii
Faculty And Staff Perceptions Of Sustainability Initiatives On Three Arkansas Two-Year College Campuses, Kenneth Ray Warden Iii
Graduate Theses and Dissertations
The purpose of this quantitative study was to explore higher education faculty and staff perspectives on sustainability initiatives within their respective institutions. Subjects of this study were faculty and staff members from three rural two year institutions of higher education in Arkansas. Data was gathered using an electronically delivered survey instrument. The survey organized sustainability initiatives into three categories which are management, academic, and operations. The organization of the survey was based upon the National Wildlife Federation's study, Campus Environment 2008; A National Report Card on Sustainability in Higher Education. In effort to determine the relationship if any between the …
Mole Street Journal, March 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, March 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Science And Technology Undergraduate Students' Use Of The Internet, Cell Phones And Social Networking Sites To Access Library Information, Lutishoor Salisbury, Jozef Laincz, Jeremy J. Smith
Science And Technology Undergraduate Students' Use Of The Internet, Cell Phones And Social Networking Sites To Access Library Information, Lutishoor Salisbury, Jozef Laincz, Jeremy J. Smith
University Libraries Faculty Publications and Presentations
Many academic libraries and publishers have developed mobile-optimized versions of their web sites and catalogs. Almost all database vendors and major journal publishers have provided a way to connect to their resources via the Internet and the mobile web. In light of this pervasive use of the Internet, mobile devices and social networking, this study examines the habits of 290 science and technology students (with majors in biology (51%), chemical engineering (15%), biological engineering (9%), kinesiology (5%), and animal science (4%)), to identify whether they use this technology for library-related activities. The primary objective of this study was to identify …
Mole Street Journal, February 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, February 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Research Frontiers, Spring 2012, University Of Arkansas Fayetteville. Office Of University Relations
Research Frontiers, Spring 2012, University Of Arkansas Fayetteville. Office Of University Relations
Research Frontiers
No abstract provided.
Center For Food Safety, Spring 2012, University Of Arkansas (System). Division Of Agriculture. Center For Food Safety
Center For Food Safety, Spring 2012, University Of Arkansas (System). Division Of Agriculture. Center For Food Safety
Center for Food Safety
No abstract provided.
Minutes Of The Faculty Senate Meeting, February 8, 2012, University Of Arkansas, Fayetteville. Faculty Senate
Minutes Of The Faculty Senate Meeting, February 8, 2012, University Of Arkansas, Fayetteville. Faculty Senate
Faculty Senate Minutes
No abstract provided.
Mole Street Journal, January 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, January 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
School Site Visits: What Can We Learn From Choice Schools In Milwaukee?, Thomas Stewart, Anna M. Jacob, Laura I. Jensen
School Site Visits: What Can We Learn From Choice Schools In Milwaukee?, Thomas Stewart, Anna M. Jacob, Laura I. Jensen
School Choice Demonstration Project
The School Site Visits study is part of the fifth series of annual reports produced by the School Choice Demonstration Project (SCDP). It describes some of the major challenges experienced and common practices demonstrated by thirteen (13) K-12 schools participating in the Milwaukee Parental Choice Program (MPCP). During the 2010-11 school year, there were 107 religious and secular schools participating in the MPCP. This report is based on visits to six of the high schools and seven K-8 schools that collectively reflect the wide range of characteristics associated with participating schools. This includes whether schools scored above or below average …
What's Going On At The Aogc (We Do Not Wear Pith Helmets In Case You Were Wondering), Shane Khoury
What's Going On At The Aogc (We Do Not Wear Pith Helmets In Case You Were Wondering), Shane Khoury
Annual of the Arkansas Natural Resources Law Institute
No abstract provided.
Arkansas Animal Science Department Report 2011, David L. Kreider
Arkansas Animal Science Department Report 2011, David L. Kreider
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Ozark Historical Review, 2012, University Of Arkansas, Fayetteville. Department Of History
Ozark Historical Review, 2012, University Of Arkansas, Fayetteville. Department Of History
The Ozark Historical Review
No abstract provided.
Arkansas Physics Times, January 2012, Society Of Physics Students (American Institute Of Physics)
Arkansas Physics Times, January 2012, Society Of Physics Students (American Institute Of Physics)
Arkansas Physics Times
No abstract provided.
Re:View, 2012, University Of Arkansas, Fayetteville. School Of Architecture
Re:View, 2012, University Of Arkansas, Fayetteville. School Of Architecture
Re:View
No abstract provided.
Annual Report, 2012, University Of Arkansas (System). Division Of Agriculture
Annual Report, 2012, University Of Arkansas (System). Division Of Agriculture
Division of Agriculture Annual Report
No abstract provided.
A+, The Honors College, 2012, University Of Arkansas, Fayetteville. Honors College
A+, The Honors College, 2012, University Of Arkansas, Fayetteville. Honors College
A+ Magazine
No abstract provided.
Mole Street Journal, December 2011, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, December 2011, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Annual Report, 2011-2012, University Of Arkansas, Fayetteville. School Of Architecture
Annual Report, 2011-2012, University Of Arkansas, Fayetteville. School Of Architecture
School of Architecture Annual Report
Description based on: 1995-1996; title from caption
Faculty Promotion And Tenure Recipients, 2012, University Of Arkansas, Fayetteville. Libraries, University Of Arkansas, Fayetteville. Provost And Vice Chancellor For Academic Affairs, University Of Arkansas, Fayetteville. Office Of The Chancellor
Faculty Promotion And Tenure Recipients, 2012, University Of Arkansas, Fayetteville. Libraries, University Of Arkansas, Fayetteville. Provost And Vice Chancellor For Academic Affairs, University Of Arkansas, Fayetteville. Office Of The Chancellor
Faculty Promotion and Tenure Reception
Event was sponsored by Chancellor and Provost