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Articles 2611 - 2640 of 20238
Full-Text Articles in Entire DC Network
Surface Modification Of Poly(Dimethylsiloxane) With 254 Nm Irradiation:A Comparison Of Functional Groups, Kenya Wallace
Surface Modification Of Poly(Dimethylsiloxane) With 254 Nm Irradiation:A Comparison Of Functional Groups, Kenya Wallace
Von Braun Symposium Student Posters
No abstract provided.
Ambient: Affordable Microsatellite Based Internet Access And Environmental Monitoring, Tyler Maddox
Ambient: Affordable Microsatellite Based Internet Access And Environmental Monitoring, Tyler Maddox
Von Braun Symposium Student Posters
No abstract provided.
The Pan American (2013-10-10), Norma Gonzalez, Lea Victoria Juarez
The Pan American (2013-10-10), Norma Gonzalez, Lea Victoria Juarez
UTPA Archives - The Pan American Newspaper
Vol. 70, No. 7
Synthesis And Characterization Of Novel Amino-Retinoid A4-Spermine, Jeffrey Swallow, Dr. Heidi Vollmer-Snarr
Synthesis And Characterization Of Novel Amino-Retinoid A4-Spermine, Jeffrey Swallow, Dr. Heidi Vollmer-Snarr
Journal of Undergraduate Research
Age Related Macular Degeneration (AMD) is the leading cause of vision loss in developed countries. The accumulation of lipofuscin in the eye causes death of the retinal pigment epithelium (RPE) leading to blindness (1,2). The lipofuscin chemical A2E has been shown to have cytotoxic effect in RPE, yet much of lipofuscin has remained uncharacterized (3). We have shown that other compounds exist in lipofuscin through preliminary mass spectroscopy (MS) and high-pressure liquid chromatography (HPLC) data collected from lipofuscin samples. Our lab is working to first characterize these lipofuscin compounds and then we will also study their oxidative products in order …
Production Of A Novel Anti-Tumor Chemotherapy Agent, Jeffrey Stephens, Dr. Merrit Andrus
Production Of A Novel Anti-Tumor Chemotherapy Agent, Jeffrey Stephens, Dr. Merrit Andrus
Journal of Undergraduate Research
Cancer is a condition unlike any other known to man. It is one of the leading causes of death in the United States. In 2000, over 500,000 deaths resulted from various cancers.1 This has led to an extensive search for improved ways to treat cancer, and has left a daunting challenge to develop new ways to treat this condition. The natural product Geldanamycin (GA), the most potent of the benzoquinone absamycin antibiotics, has shown to have great promise as an anti-tumor agent. The analog of Geldanamycin, 17-Allylanino-GA, is currently in clinical trials2, and the first total synthesis of GA was …
Retinal-Bio-Amine Synthesis Related To Age-Related Macular Degeneration, Matthew Sparks, Dr. Heidi Vollmer-Snarr
Retinal-Bio-Amine Synthesis Related To Age-Related Macular Degeneration, Matthew Sparks, Dr. Heidi Vollmer-Snarr
Journal of Undergraduate Research
Age-related Macular Degeneration (AMD) is the leading cause for blindness among the world’s elderly population1. As the central region of the retina, known as the macula, is damaged and begins to deteriorate, central vision becomes clouded. This vision loss progresses until the affected person becomes completely and permanently blind. To date, AMD is an incurable disease.
Investigate And Study Of The Properties Of 2,2-Dipicolyamine And It Interactions With Anions, Martin Conda Sheridan, Dr. John Lamb
Investigate And Study Of The Properties Of 2,2-Dipicolyamine And It Interactions With Anions, Martin Conda Sheridan, Dr. John Lamb
Journal of Undergraduate Research
Compared to cation ligand interactions, anion ligand studies are less well known. We studied the interactions of protonated cavitands, Fig 1, with anions because of their many applications, including: environmental waste remediation, anion separation, binding constant determination, and molecular structure recognition.
Stereo-Selective Photochemical [2+2] Cycloaddition: Π-Π Interactions Or Radical Stabilization, Alexander Parent, Dr. Steven Fleming
Stereo-Selective Photochemical [2+2] Cycloaddition: Π-Π Interactions Or Radical Stabilization, Alexander Parent, Dr. Steven Fleming
Journal of Undergraduate Research
Organic chemistry centers around the stereo- and regioselective formation of C–C bonds. Although [4+2] and [2+2] cycloadditions present the opportunity for single-step creation of multiple stereocenters and two C–C bonds, the products resulting from intermolecular cycloadditions can be hard to predict and yields of any single isomer can be low. These obstacles can be overcome by the use of a removable tether, which induces regio- and stereo-control through the forced intramolecular reaction. The silyl acetal-tethered [2+2] photocycloaddition has been shown to produce high yields of a single product when both of the reacting alkenes contain extended p-systems. This phenomenon is …
Cadmium Specific Ion Sensor, David Michaelis, Dr. Paul Savage
Cadmium Specific Ion Sensor, David Michaelis, Dr. Paul Savage
Journal of Undergraduate Research
In recent years it has become critical to detect and monitor concentrations of heavy metal ions in the environment. Cadmium and other heavy metals have detrimental effects to human health. The main difficulty of sensing these ions is selectively detecting the ions in the presence of other naturally present metal ions such as calcium, zinc, and copper. Fluorescent molecular sensors provide an ideal solution to the problem. These organic sensors can be constructed to selectively bind with target metal ions. While many such sensors exist today, little work has been done to incorporate such sensors into portable sensing devices.
Isolation, Structure Identification And Cytotoxic Studies Of Biologically Active Compounds In Carica Papaya Of Ghana, Kurtis S. Staples, Dr. Steven G. Wood
Isolation, Structure Identification And Cytotoxic Studies Of Biologically Active Compounds In Carica Papaya Of Ghana, Kurtis S. Staples, Dr. Steven G. Wood
Journal of Undergraduate Research
Carica papaya, commonly known as the papaya plant, is found in large abundance throughout the tropical regions of the planet. The fruit of the plant has been extensively studied with papain, a protease, being the center of research. Preliminary studies showed that compounds found in the leaves of the plant possessed anti-cancer properties. As alternatives for cancer treatment are constantly being sought, plant extracts have risen to the forefront in this hunt.1 An understanding of the structure and mode of activity of the compounds in this plant will further knowledge of how to develop chemotherapeutic agents.
Synthesis Of Hiv Integrase Inhibitors, Carl Jones, Dr. Matt A. Peterson
Synthesis Of Hiv Integrase Inhibitors, Carl Jones, Dr. Matt A. Peterson
Journal of Undergraduate Research
We have made significant progress toward the synthesis of one branch of the library of compounds that we plan to synthesize. The scheme we have followed is shown below. Once synthesized, we plan to have the compounds tested by expert collaborators to see how well they bind HTLV integrase. In addition, they will be tested against many viruses and cancers, as well as HIV. Because they are nucleoside based, it is impossible to predict exactly what type of biological activity these compounds will have. They could possibly treat a variety of diseases.
Thermodynamics Of Titanium Oxide Nanoparticles, Marcus Donaldson, Dr. Juliana Boerio-Goates
Thermodynamics Of Titanium Oxide Nanoparticles, Marcus Donaldson, Dr. Juliana Boerio-Goates
Journal of Undergraduate Research
I studied the thermodynamics of titanium oxide nanoparticles using adiabatic and semi-adiabatic calorimetry.
Preferential Infection Of Germinal Center T Cells By X4 Tropic Hiv, Christopher M. Cherry, Dr. Gregory F. Burton
Preferential Infection Of Germinal Center T Cells By X4 Tropic Hiv, Christopher M. Cherry, Dr. Gregory F. Burton
Journal of Undergraduate Research
HIV infects CD4 T cells through binding to CD4 and an appropriate co-receptor. Two co-receptors of concern in HIV biology are CXCR4 and CCR5 because of their affect on disease progression. The majority of transmittable HIV strains use CCR5 as a co-receptor. However, during the latter stages of disease the virus may shift from using CCR5 to using CXCR4 as its co-receptor. This change is referred to as a shift in tropism, and it is of major concern because it leads to rapid disease progression (3). The site and mechanism by which this shift occurs still elude scientists. Recent findings …
Understanding Isolated Systems Of Hard Spheres, Scott Burt, Dr. Randy Shirts
Understanding Isolated Systems Of Hard Spheres, Scott Burt, Dr. Randy Shirts
Journal of Undergraduate Research
Chemical modeling is an increasingly important tool in modern research. Despite vast improvements in computational speed, most systems of interest are so complex that simulations must be carried out on model systems that are much smaller and simpler than the system of interest. However, such simplified systems often contain constraints that do not apply to the larger system. This causes significant deviations from the true behavior of the corresponding macroscopic system. Such deviations are known as finite size effects. Understanding these effects are important for correctly extrapolating simulation results to the macroscopic system of interest. For example, chemical simulations are …
Pressure Perturbation Calorimetry, Blair R. Brown, Dr. Earl M. Woolley
Pressure Perturbation Calorimetry, Blair R. Brown, Dr. Earl M. Woolley
Journal of Undergraduate Research
In Dr. Woolley’s lab we have made extensive measurements of the Apparent Molar Heat Capacities of aqueous solutions using a Nano Differential Scanning Calorimeter, N-DSC (Calorimetry Science Corporation, Spanish Fork, UT). Through modifications to the N-DSC we are now able to do pressure perturbation calorimetry. That is to say we may now change the pressure of a solution and measure the change in the heat of that solution, (dq/dP)T ( as opposed to (dq/dT)p which is heat capacity). This property is related to entropy by the 2nd law of thermodynamics in the following way (dq/dP)T = T(dS/dP)T. From a Maxwell …
Understanding The Secretion Of Histamine, Sean P. Brady, Dr. Paul B. Savage
Understanding The Secretion Of Histamine, Sean P. Brady, Dr. Paul B. Savage
Journal of Undergraduate Research
With help from fellow lab members, this project involved the synthesis of several antigen linkers in order to aid the understanding of histamine secretion of basophil cells. It is hypothesized that the bi-valent linkers (such as the ones outlined below) do not stimulate basophil cells, but that the tri-valent antigens (not shown in this report) do cause granulation of cells.
Improving Error Discovery In Guided Search Model Checking, Neha Rungta, Dr. Eric Mercer
Improving Error Discovery In Guided Search Model Checking, Neha Rungta, Dr. Eric Mercer
Journal of Undergraduate Research
As computer systems grow in complexity it is becoming harder to completely test them. The cost of finding and correcting errors after deployment is staggering. Current validation methods are not well suited to finding subtle errors laden in the concurrency of modern systems. This project searches the behavior in such systems, guiding the search to focus its time in areas that seem most likely to contain errors. This work decreases the amount of time and memory needed for the errors that are found and corrected before deployment of the system. In this project we have developed a heuristic that takes …
A Customer Loyalty Program For The Byu Bookstore, Steven Hulet, Dr. Sean Warnick
A Customer Loyalty Program For The Byu Bookstore, Steven Hulet, Dr. Sean Warnick
Journal of Undergraduate Research
Because of its relationship with Brigham Young University, the BYU Bookstore is in a position to know more about its customers on an individual basis than possible for the average firm operating in the free market. Such in-depth knowledge of a customer base allows a firm to better serve its customers and can result in greater satisfaction for the customers and greater revenue for the firm.
Control Chart Development For The Coefficient Of Variation, Geraldine Madariaga, Dr. C. Shane Reese
Control Chart Development For The Coefficient Of Variation, Geraldine Madariaga, Dr. C. Shane Reese
Journal of Undergraduate Research
Industries use control charts to evaluate whether or not a process is “in control” or producing parts that meet the standards of quality. Control charts are based on the principle that variation between samples can be predicted based on sampling distributions. Parts are measured and the computed test statistic is plotted within limits that are based on the standard deviation or quantiles of the sampling distribution of the test statistic.
An Evaluation Of Precipitation Climate Datasets In The Ganges-Brahmaputra-Meghna Rivers Basin, James Brenton
An Evaluation Of Precipitation Climate Datasets In The Ganges-Brahmaputra-Meghna Rivers Basin, James Brenton
Von Braun Symposium Student Posters
No abstract provided.
Method And Implementation Of Absolute Near Cylindrical Wavefront Testing, Ayshah Alatawi
Method And Implementation Of Absolute Near Cylindrical Wavefront Testing, Ayshah Alatawi
Von Braun Symposium Student Posters
No abstract provided.
Particle Acceleration At Shock Pair, Lulu Zhao
Particle Acceleration At Shock Pair, Lulu Zhao
Von Braun Symposium Student Posters
No abstract provided.
Hydromagnetic Waves In A Compressed Dipole Field Via Field-Aligned Klein-Gordon Equations, Jinlei Zheng
Hydromagnetic Waves In A Compressed Dipole Field Via Field-Aligned Klein-Gordon Equations, Jinlei Zheng
Von Braun Symposium Student Posters
No abstract provided.
Remote Sensing Of Aquatic Vegetation And Agricultural Activity In Lake Guntersville, Casey Calamaio, Kel Markert
Remote Sensing Of Aquatic Vegetation And Agricultural Activity In Lake Guntersville, Casey Calamaio, Kel Markert
Von Braun Symposium Student Posters
No abstract provided.
Validation Of Satellite Digital Elevation Model Data Through Field Measurements To Help Improve Landslide Susceptibility Modeling, Leigh Baggett, Rob Graham, Cameron Kowalski
Validation Of Satellite Digital Elevation Model Data Through Field Measurements To Help Improve Landslide Susceptibility Modeling, Leigh Baggett, Rob Graham, Cameron Kowalski
Von Braun Symposium Student Posters
No abstract provided.
Wireless Sensor Network: Environmental Applications, Aaron Kaulfus
Wireless Sensor Network: Environmental Applications, Aaron Kaulfus
Von Braun Symposium Student Posters
No abstract provided.
Using Satellite Data With On Site Measurements To Create Estimates Of Biomass As A Baseline For Future Studies Of Caribbean Pine, Jeanné Le Roux, Kaitlyn Pate, Jonathan Chenault, Robert Rossell
Using Satellite Data With On Site Measurements To Create Estimates Of Biomass As A Baseline For Future Studies Of Caribbean Pine, Jeanné Le Roux, Kaitlyn Pate, Jonathan Chenault, Robert Rossell
Von Braun Symposium Student Posters
No abstract provided.
Archaeological Remote Sensing: Exploring The Past From Space, Kel Markert
Archaeological Remote Sensing: Exploring The Past From Space, Kel Markert
Von Braun Symposium Student Posters
No abstract provided.
Emu Today, October 10, 2013, Eastern Michigan University
Emu Today, October 10, 2013, Eastern Michigan University
EMU Today
No abstract provided.
Planet Hunters. V. A Confirmed Jupiter-Size Planet In The Habitable Zone And 42 Planet Candidates From The Kepler Archive Data, Ji Wang, Debra A. Fischer, Thomas Barclay, Tabetha S. Boyajian, Justin R. Crepp, Megan E. Schwamb, Chris Lintott, Kian J. Jek, Arfon M. Smith, Michael Parrish, Kevin Schawinski, Joseph R. Schmitt, Matthew J. Giguere, John M. Brewer, Stuart Lynn, Robert Simpson, Abe J. Hoekstra, Thomas Lee Jacobs, Daryll Lacourse, Hans Martin Schwengeler, Mike Chopin, Rafal Herszkowicz
Planet Hunters. V. A Confirmed Jupiter-Size Planet In The Habitable Zone And 42 Planet Candidates From The Kepler Archive Data, Ji Wang, Debra A. Fischer, Thomas Barclay, Tabetha S. Boyajian, Justin R. Crepp, Megan E. Schwamb, Chris Lintott, Kian J. Jek, Arfon M. Smith, Michael Parrish, Kevin Schawinski, Joseph R. Schmitt, Matthew J. Giguere, John M. Brewer, Stuart Lynn, Robert Simpson, Abe J. Hoekstra, Thomas Lee Jacobs, Daryll Lacourse, Hans Martin Schwengeler, Mike Chopin, Rafal Herszkowicz
Faculty Publications
We report the latest Planet Hunter results, including PH2 b, a Jupiter-size (RPL = 10.12 ± 0.56 R ⊕) planet orbiting in the habitable zone of a solar-type star. PH2 b was elevated from candidate status when a series of false-positive tests yielded a 99.9% confidence level that transit events detected around the star KIC 12735740 had a planetary origin. Planet Hunter volunteers have also discovered 42 new planet candidates in the Kepler public archive data, of which 33 have at least 3 transits recorded. Most of these transit candidates have orbital periods longer than 100 days and 20 are …