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Articles 5431 - 5460 of 7189
Full-Text Articles in Entire DC Network
Arkansas Animal Science Department Report 2010, Zelpha B. Johnson, D. Wayne Kellogg
Arkansas Animal Science Department Report 2010, Zelpha B. Johnson, D. Wayne Kellogg
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Jeanne Clery Disclosure Of Campus Security Policy And Campus Crime Statistics Report, 2008, University Of Arkansas, Fayetteville. Police Department
Jeanne Clery Disclosure Of Campus Security Policy And Campus Crime Statistics Report, 2008, University Of Arkansas, Fayetteville. Police Department
Jeanne Clery Disclosure of Campus Security Policy
No abstract provided.
Mole Street Journal, September 2009, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, September 2009, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Summaries Of Arkansas Cotton Research 2008, Derrick M. Oosterhuis
Summaries Of Arkansas Cotton Research 2008, Derrick M. Oosterhuis
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Food Safety Consortium Newsletter, Fall 2009, Food Safety Consortium (U.S.)
Food Safety Consortium Newsletter, Fall 2009, Food Safety Consortium (U.S.)
Food Safety Consortium Newsletter
No abstract provided.
Mole Street Journal, August 2009, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, August 2009, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Graduate, Fall-Winter 2009, Dale Bumpers College Of Agricultural, Food, And Life Sciences (University Of Arkansas, Fayetteville)
Graduate, Fall-Winter 2009, Dale Bumpers College Of Agricultural, Food, And Life Sciences (University Of Arkansas, Fayetteville)
Graduate
"For alumni and friends of the Dale Bumpers College of Agricultural, Food and Life Sciences and the University of Arkansas System Division of Agriculture."
Education Policy News, Fall 2009, No. 1, University Of Arkansas, Fayetteville. Dept. Of Education Reform. Office For Education Policy
Education Policy News, Fall 2009, No. 1, University Of Arkansas, Fayetteville. Dept. Of Education Reform. Office For Education Policy
Education Policy News
No abstract provided.
Mole Street Journal, July 2009, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, July 2009, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Nano-Surface Engineering On Copper Substrate For Friction Reduction, Julius Morehead
Nano-Surface Engineering On Copper Substrate For Friction Reduction, Julius Morehead
Mechanical Engineering Undergraduate Honors Theses
Nano-engineered-textures on a material surface used to conduct fluids can significantly improve the hydrophobicity or wetting property of the surface, resulting in lower resistance of the surface to the fluid?s movement. In this work, aluminum-induced crystallization of amorphous silicon was investigated for generating nano-textures on copper substrates, a common material in heating, ventilating, air conditioning, and refrigeration systems. Flat copper substrate was utilized. Several experiments were conducted to study the effects of annealing temperature, annealing duration, a-Si and Al thickness, and the sequence of film structure. Scanning electron microscopy was employed to characterize the surface nano-topography. The results showed that …
Teacher Effectiveness In Urban High Schools, Richard Buddin, Gema Zamarro
Teacher Effectiveness In Urban High Schools, Richard Buddin, Gema Zamarro
Education Reform Faculty and Graduate Students Publications
This research examines whether teacher licensure test scores and other teacher qualifications affect high school student achievement. The results are based on longitudinal student-level data from Los Angeles. The achievement analysis uses a value-added approach that adjusts for both student and teacher fixed effects. The results show little relationship between traditional measures of teacher quality (e.g., experience and education level) and student achievement in English Language Arts (ELA) or math. Similarly, teacher aptitude and subject-matter knowledge, as measured on state licensure tests, have no significant effects on student achievement. Achievement outcomes differ substantially from teacher to teacher, however, and the …
Proton Irradiation Effects On Semiconductor Cdse/Zns Core/Shell Nanocrystals, Stephen Graham Charter
Proton Irradiation Effects On Semiconductor Cdse/Zns Core/Shell Nanocrystals, Stephen Graham Charter
Graduate Theses and Dissertations
The absorbance and photoluminescence measurement of semiconductor CdSe/ZnS core shell nanocrystals were reviewed and investigated after they were exposed to proton irradiation. The CdSe/ZnS core shell nanocrystals of 3.2nm and 4.4nm were commercially purchased and investigated. These nanocrystals were embedded in UV resin. Proton irradiation of energy 2MeV was applied at doses from 3 x 1013 protons cm-2 to 1.47 x 1015 protons cm-2 for both nanocrystal sizes. Absorbance measurements were conducted at 300K. Results from absorbance measurements showed slight broadening of the first exciton peak of both samples but was most noticeable in the 3.2nm nanocrystal sample. UV resin …
Frequency Distributions Of Median Nutrient And Chlorophyll Concentrations Across The Red River Basin, 1996-2006, S.D. Longing, B.E. Haggard
Frequency Distributions Of Median Nutrient And Chlorophyll Concentrations Across The Red River Basin, 1996-2006, S.D. Longing, B.E. Haggard
Arkansas Water Resources Center Technical Reports
Acquisition and compilation of water quality data for a ten year time period (1996 – 2006) from 589 stream and river stations was conducted to support nutrient criteria development for the multi–state Red River Basin shared by Arkansas, Louisiana, New Mexico, Oklahoma and Texas, USA. Twenty–three water quality parameters were collected from five data sources (USGS, ADEQ, LDEQ, OCC, OWRB, and TCEQ) and an additional 13 parameters were acquired from at least one source. Data for the primary biological parameter of interest, chlorophyll a, was sparse and available from only two sources. Following compilation of data, medians were calculated for …
Heterosternuta Sulphuria (Coloptera: Dytiscidae) Occurence In The Sulphur Springs Headwater System And In Buffalo National River Tributaries (Arkansas, Usa): Current Distribution, Habitat Conditions, And Biomonitoring Framework, S.D. Longing, B.E. Haggard
Heterosternuta Sulphuria (Coloptera: Dytiscidae) Occurence In The Sulphur Springs Headwater System And In Buffalo National River Tributaries (Arkansas, Usa): Current Distribution, Habitat Conditions, And Biomonitoring Framework, S.D. Longing, B.E. Haggard
Arkansas Water Resources Center Technical Reports
Heterosternuta sulphuria is an endemic aquatic species of concern in Arkansas, with a priority score of 80 out of 100 and a conservation rank of S1and G1. A need of the Arkansas Wildlife Action Plan (AWAP) was to obtain baseline information on distribution and population status of H. sulphuria. Here, we report new H. sulphuria records for 39 sites across 10 counties in the Ozark Highlands and Boston Mountain ecoregions and a determined habitat type of shallow margins and small bedrock pools of perennial streams and spring seeps. Few habitat patches were observed per site because detection was typically rapid …
Faculty Publications & Presentations, 2008-2009, University Of Arkansas, Fayetteville
Faculty Publications & Presentations, 2008-2009, University Of Arkansas, Fayetteville
Faculty Publications and Presentations
No abstract provided.
Annual Report, 2008-2009, University Of Arkansas, Fayetteville. Office Of The Vice Provost For Research, University Of Arkansas, Fayetteville. Graduate School And International Education
Annual Report, 2008-2009, University Of Arkansas, Fayetteville. Office Of The Vice Provost For Research, University Of Arkansas, Fayetteville. Graduate School And International Education
Graduate School and International Education Annual Report
No abstract provided.
Concentrated, Non-Foaming Solution Of Quaternary Ammonium Compounds And Methods Of Use, Cesar M. Compadre, Philip J. Breen, Hamid Salari, E. Kim Fifer, Danny L. Lattin, Michael F. Slavik, Yanbin Li, Timothy O'Brien, Amy L. Waldroup, Thomas F. Berg
Concentrated, Non-Foaming Solution Of Quaternary Ammonium Compounds And Methods Of Use, Cesar M. Compadre, Philip J. Breen, Hamid Salari, E. Kim Fifer, Danny L. Lattin, Michael F. Slavik, Yanbin Li, Timothy O'Brien, Amy L. Waldroup, Thomas F. Berg
Patents Granted
A concentrated quaternary ammonium compound (QAC) solution with a concentration from greater than about 10% by weight and at least one solubility enhancing agent, such as an alcohol, is disclosed. A diluted QAC solution is used to contact food products to prevent microbial growth on the food products from a broad spectrum of foodborne microbial contamination. A method of contacting the food products with the dilute QAC for an application time of at least 0.1 second is disclosed. The foods that can be treated by this method are meat and meat products, seafood, vegetables, fruit, dairy products, pet foods and …
Faculty Impact Statements, 2008, Arkansas Agricultural Experiment Station
Faculty Impact Statements, 2008, Arkansas Agricultural Experiment Station
Agricultural Experiment Station Records
Each issue [in the Research Series] has a distinctive title
Avian Advice, Summer 2009, Dale Bumpers College Of Agricultural, Food, And Life Sciences (University Of Arkansas, Fayetteville). Center Of Excellence For Poultry Science, University Of Arkansas (System). Cooperative Extension Service
Avian Advice, Summer 2009, Dale Bumpers College Of Agricultural, Food, And Life Sciences (University Of Arkansas, Fayetteville). Center Of Excellence For Poultry Science, University Of Arkansas (System). Cooperative Extension Service
Avian Advice
No abstract provided.
Benefactor, Summer 2009, University Of Arkansas, Fayetteville
Benefactor, Summer 2009, University Of Arkansas, Fayetteville
Benefactor
No abstract provided.
Partners, May 2009, Dale Bumpers College Of Agricultural, Food, And Life Sciences (University Of Arkansas, Fayetteville). Center Of Excellence For Poultry Science
Partners, May 2009, Dale Bumpers College Of Agricultural, Food, And Life Sciences (University Of Arkansas, Fayetteville). Center Of Excellence For Poultry Science
Partners
No abstract provided.
Computational Modeling Of The Internal Structure In The Breast, Jordan Greenlee
Computational Modeling Of The Internal Structure In The Breast, Jordan Greenlee
Electrical Engineering Undergraduate Honors Theses
Many researchers who are using microwave modality in the area of breast cancer detection employ oversimplified models of the internal structure of the breast. Use of engineered or biologically inaccurate models could render inaccurate results. Therefore, a mathematical biological model is implemented in this work and aims to bridge the gap between biologists and engineers. The results of the proposed breast duct model show that older women have smaller breast ducts leading to less dense breasts, which is in agreement with medical knowledge. Also, younger women have larger breast ducts leading to more dense breasts which are consistent with the …
Understanding Sources And Consequences Of Variation In Self-Assembly, Arjun Dasgupta
Understanding Sources And Consequences Of Variation In Self-Assembly, Arjun Dasgupta
Computer Science and Computer Engineering Undergraduate Honors Theses
Self-assembly is the process of constructing a larger structure from small component parts that randomly collide and bond through weak interactions [2]. It is a potentially important method in the field of nanoscale manufacturing. However, because of the nature of self-assembly, randomness and the design of self-assembly compete with each other, and unforeseen things can be produced. In this thesis, the tiling assembly model of Winfree [7] was simulated. The tiling assembly model has two bonds which assemble planar nanostructures. The goal of the simulations was to determine what probabilities would produce an average degree of four (the ideal) for …
Preliminary Study Based On The Ddscat Software To Explore Increasing The Contrast Of Breast Tumors For Microwave Imaging, Rachel Megee
Preliminary Study Based On The Ddscat Software To Explore Increasing The Contrast Of Breast Tumors For Microwave Imaging, Rachel Megee
Electrical Engineering Undergraduate Honors Theses
Microwave technology is being researched for its capabilities to detect breast tumors less painfully and at earlier stages. It is necessary to have a large contrast between cancerous and healthy tissue when the microwaves are reflected off the breast tissue. To model the increasing contrast between cancerous breast tissue and healthy breast tissue, the DDSCAT code is investigated for its capabilities and analyzed for its accuracy in scattering calculations. The DDSCAT is used to model homogenous and inhomogeneous targets. Simulations of the scattering field by the homogeneous and inhomogeneous targets are conducted and compared to Mie theory calculations for accuracy. …
A Robust Process For Biodiesel Production Using Supercritical Methanol, Meagan Magie
A Robust Process For Biodiesel Production Using Supercritical Methanol, Meagan Magie
Chemical Engineering Undergraduate Honors Theses
The overarching purpose of Phase I was to test, at the bench scale, a continuous supercritical methanol reactor, and to determine the feasibility of implementing the technology at full scale. Specific objectives in reaching this purpose included:
Objective 1: Choose a viable feedstock
Objective 2: Perform experiments for oil extraction
Objective 3: Design, build and operate a continuous supercritical methanol reactor
Objective 4: Design and simulate full scale biodiesel facility
Objective 4a: Perform life-cycle and economic analysis on full scale design
Objective 5: Prepare a Phase II P3 project to demonstrate the entire biodiesel process
Project Scope: The students performed …
A Robust Process For Biodiesel Production Using Supercritical Methanol, Travis Roberts
A Robust Process For Biodiesel Production Using Supercritical Methanol, Travis Roberts
Chemical Engineering Undergraduate Honors Theses
The overarching purpose of Phase I was to test, at the bench scale, a continuous supercritical methanol reactor, and to determine the feasibility of implementing the technology at full scale. Specific objectives in reaching this purpose included:
Objective 1: Choose a viable feedstock
Objective 2: Perform experiments for oil extraction
Objective 3: Design, build and operate a continuous supercritical methanol reactor
Objective 4: Design and simulate full scale biodiesel facility
Objective 4a: Perform life-cycle and economic analysis on full scale design
Objective 5: Prepare a Phase II P3 project to demonstrate the entire biodiesel process
Project Scope: The students performed …
Detection Of Escherichia Coli Using The Bacteriophage-Based Fluorescent Technique, Aung Khaing
Detection Of Escherichia Coli Using The Bacteriophage-Based Fluorescent Technique, Aung Khaing
Biological and Agricultural Engineering Undergraduate Honors Theses
The detection of viable Escherichia coli (E. coli) by the bacteriophage-based fluorescent technique using the enhanced green fluorescent protein (EGFP) was tested in this project. EGFP, a mutant of green fluorescent protein (GFP), was used due to its high fluorescent efficiency compared to wild-type GFP. First, E. coli bacteria were cultured to the mid-exponential phase in the 2× YT medium and then they were infected with the M13 bacteriophages containing the EGFP gene. Infected bacteria were incubated for different time intervals, and the expression of EGFP on the E. coli membrane was tested by the PerkinElmer LS 55 Luminescence Spectrometer, …
A Robust Process For Biodiesel Production Using Supercritical Methanol, Thomas Kasprowicz
A Robust Process For Biodiesel Production Using Supercritical Methanol, Thomas Kasprowicz
Chemical Engineering Undergraduate Honors Theses
The overarching purpose of Phase I was to test, at the bench scale, a continuous supercritical methanol reactor, and to determine the feasibility of implementing the technology at full scale. Specific objectives in reaching this purpose included:
Objective 1: Choose a viable feedstock
Objective 2: Perform experiments for oil extraction
Objective 3: Design, build and operate a continuous supercritical methanol reactor
Objective 4: Design and simulate full scale biodiesel facility
Objective 4a: Perform life-cycle and economic analysis on full scale design
Objective 5: Prepare a Phase II P3 project to demonstrate the entire biodiesel process
Project Scope: The students performed …
Proximate Characterization And Lycopene Determination In Bitter Melon Seed Aril, Luis Raul Jimenez Interiano
Proximate Characterization And Lycopene Determination In Bitter Melon Seed Aril, Luis Raul Jimenez Interiano
Chemical Engineering Undergraduate Honors Theses
Bitter melon aril is the mucilage covering the fruit's seeds which could contain beneficial dietary ingredients. The bright red color of bitter melon aril suggests that it could contain lycopene. The purpose of this study was to determine the proximate composition of bitter melon aril and to explore this material as a potential rich source of lycopene that has health benefits. Bitter melon aril from Sri Lanka, harvested in Arkansas, USA in 2005, 2006, and 2007 was analyzed. An investigation to develop an extraction method for lycopene from bitter melon was performed using liquid-liquid and a polar liquid extraction. The …
Understanding The Effects Of Hydrophobicity For The Detection Of Methylated Dna By Microchannel Electrophoresis, Micah Fritsche
Understanding The Effects Of Hydrophobicity For The Detection Of Methylated Dna By Microchannel Electrophoresis, Micah Fritsche
Chemical Engineering Undergraduate Honors Theses
DNA methylation is an epigenetic mechanism used for long - term silencing of gene expression. This silencing of gene expression can be involved in the down regulation of genes involved in apoptosis, which is a process of regulated cell death, and this inability to break down cells can ultimately lead to tumor formation in cancer. Methylation of DNA follows a certain pattern through developmental stages of an individual, and this pattern is normally maintained throughout that individual's life. However, in the DNA of older individuals, this methylation is commonly seen to be altered. This altered pattern of methylation can be …