Digital Commons Network^™

F07rs Sgb No. 22 (Iowa Pres Caucuses - Cooper), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

F07rs Sgb No. 27 (Iowa Pres Caucuses - Mcluer), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

F07rs Sgb No. 25 (Iowa Pres Caucuses - Mayhall), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

F07rs Sgb No. 26 (Iowa Pres Caucuses - Mcallister), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

F07rs Sgb No. 28 (Iowa Pres Caucuses - Mims), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

F07rs Sgb No. 29 (Iowa Pres Caucuses - Schott), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

F07rs Sgb No. 31 (Iowa Pres Caucuses - Woodard), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

F07rs Sgb No. 32 (Iowa Pres Caucuses - Weiner), Prestridge

Student Senate Enrolled Legislation

No abstract provided.

Conformational Control Of Selectivity In The Dienone-Phenol Rearrangement, Anne M. Sauer, William E. Crowe, Gregg Henderson, Roger A. Laine

Faculty Publications

We have explored the dienone-phenol rearrangement of substrates where: only the p-cresol pathway is possible and relative migratory aptitudes should play no role in determining the regiochemistry of the reaction. For these substrates the selectivity of the rearrangement was found to depend on the stereochemistry of the spirocyclic intermediate formed during the course of the rearrangement. Rearrangement of one of these substrates gave-surprisingly-a single regioisomeric product. Selectivity in this case can be correlated with the relative stability of cationic intermediates, which lie on the pathway between spirocycle and final product. © 2007 Elsevier Ltd. All rights reserved.

Reconstructions: New Perspectives On The Postbellum United States., Richard Zuczek

Civil War Book Review

Reassessing Reconstruction Scholarship

Spiroplasma Spp. From Transmissible Spongiform Encephalopathy Brains Or Ticks Induce Spongiform Encephalopathy In Ruminants, Frank O. Bastian, Dearl E. Sanders, Will A. Forbes, Sue D. Hagius, Joel V. Walker, William G. Henk, Fred M. Enright, Philip H. Elzer

Faculty Publications

Spiroplasma, small motile wall-less bacteria, are linked by molecular and serological studies to the transmissible spongiform encephalopathies (TSEs), which include scrapie in sheep, chronic wasting disease (CWD) in deer and Creutzfeldt-Jakob disease in humans. In this study, two experiments were undertaken to determine the role of spiroplasma in the pathogenesis of TSE. In experiment 1, Spiroplasma mirum, a rabbit tick isolate that had previously been shown to experimentally induce spongiform encephalopathy in rodents, was inoculated intracranially (IC) into ruminants. S. mirum-inoculated deer manifested clinical signs of TSE after 1.5 to 5.5 months incubation. The deer, as well as sheep and …

Epitope Mapping Of Hsv-1 Glycoprotein K (Gk) Reveals A T Cell Epitope Located Within The Signal Domain Of Gk, Yanira Osorio, Kevin R. Mott, Abdul M. Jabbar, Alberto Moreno, Timothy P. Foster, Konstantin G. Kousoulas, Homayon Ghiasi

Faculty Publications

Glycoprotein K (gK) is a virion envelope component of herpes simplex virus types 1 (HSV-1) and 2 (HSV-2), which plays an important role in virion morphogenesis and egress. We previously demonstrated that immunization of mice with gK, but not with any of the 10 other HSV-1 glycoproteins, resulted in exacerbation of corneal scarring and herpetic dermatitis following ocular HSV-1 infection. However, little is known about the gK epitope(s) that is (are) involved in T cell activities in vitro or in vivo. Thus, epitope mapping of gK was performed using a panel of 15-mer peptides with five-amino acid overlaps spanning the …

Spiroplasma Spp. From Transmissible Spongiform Encephalopathy Brains Or Ticks Induce Spongiform Encephalopathy In Ruminants, Frank O. Bastian, Dearl E. Sanders, Will A. Forbes, Sue D. Hagius, Joel V. Walker, William G. Henk, Fred M. Enright, Philip H. Elzer

Faculty Publications

Spiroplasma, small motile wall-less bacteria, are linked by molecular and serological studies to the transmissible spongiform encephalopathies (TSEs), which include scrapie in sheep, chronic wasting disease (CWD) in deer and Creutzfeldt-Jakob disease in humans. In this study, two experiments were undertaken to determine the role of spiroplasma in the pathogenesis of TSE. In experiment 1, Spiroplasma mirum, a rabbit tick isolate that had previously been shown to experimentally induce spongiform encephalopathy in rodents, was inoculated intracranially (IC) into ruminants. S. mirum-inoculated deer manifested clinical signs of TSE after 1.5 to 5.5 months incubation. The deer, as well as sheep and …

Exchange Bias Behavior In Ni-Mn-Sb Heusler Alloys, Mahmud Khan, Igor Dubenko, Shane Stadler, Naushad Ali

Faculty Publications

The authors report the observation of exchange bias in bulk polycrystalline Ni50 Mn25+x Sb25-x Heusler alloys. Shifts in hysteresis loops of up to 248 Oe were observed in the 5 T field cooled samples. The observed exchange bias behavior in Ni50 Mn25+x Sb25-x is attributed to the coexistence of antiferromagnetic and ferromagnetic exchange interactions in the system. Such behavior is an addition to the multifunctional properties of the Ni50 Mn25+x Sb25-x Heusler alloy system. © 2007 American Institute of Physics.

Enhanced Electrogenerated Chemiluminescence In The Presence Of Fluorinated Alcohols, David J. Vinyard, Mark M. Richter

Faculty Publications

The electrdchemistry, UV-vis absorption, photoluminescence (PL), and coreactant electrogenerated chemiluminescence (ECL) of Ru(bpy)32+ (where bpy = 2,2′-bipyridine) have been obtained in a series of hydroxylic solvents. The solvents included fluorinated and nonfluorinafed alcohols and alcohol/water mixtures. Tri-n-propylamine was used as the oxidative-reductive ECL coreactant. Blue shifts of up to 30 nm in PL emission wavelength maximums are observed compared to a Ru(bpy)32+/H2O standard due to interactions of the polar excited state (i.e., *Ru(bpy)32+) with the solvent media. For example, Ru(bpy)32+ in water has an emission maximum of 599 nm while in the more polar hexafluoropropanol and trifluoroethanol it is 562 …

Functional Analysis Of Polyphenol Oxidases By Antisense/Sense Technology, Piyada Thipyapong, Michael J. Stout, Jutharat Attajarusit

Faculty Publications

Polyphenol oxidases (PPOs) catalyze the oxidation of phenolics to quinones, the secondary reactions of which lead to oxidative browning and postharvest losses of many fruits and vegetables. PPOs are ubiquitous in angiosperms, are inducible by both biotic and abiotic stresses, and have been implicated in several physiological processes including plant defense against pathogens and insects, the Mehler reaction, photoreduction of molecular oxygen by PSI, regulation of plastidic oxygen levels, aurone biosynthesis and the phenylpropanoid pathway. Here we review experiments in which the roles of PPO in disease and insect resistance as well as in the Mehler reaction were investigated using …

Vacuum Energy And Repulsive Casimir Forces In Quantum Star Graphs, S. A. Fulling, L. Kaplan, J. H. Wilson

Faculty Publications

Casimir pistons are models in which finite Casimir forces can be calculated without any suspect renormalizations. It has been suggested that such forces are always attractive, but we present several counterexamples, notably a simple type of quantum graph in which the sign of the force depends upon the number of edges. We also show that Casimir forces in quantum graphs can be reliably computed by summing over the classical orbits, and study the rate of convergence of the periodic orbit expansion. In generic situations where no analytic expression is available, the sign and approximate magnitude of Casimir forces can often …

Development Of A Simplified And Standardized Protocol With Potential For High-Throughput For Sperm Cryopreservation In Zebrafish Danio Rerio, Huiping Yang, Carrie Carmichael, Zoltan M. Varga, Terrence R. Tiersch

Faculty Publications

Sperm cryopreservation offers potential for long-term storage of genetic resources. However, the current protocols for zebrafish Danio rerio are cumbersome and poorly reproducible. Our objective was to facilitate adoption of cryopreservation by streamlining methods from sperm collection through thawing and use. First, sperm activation was evaluated, and motility was completely inhibited when osmolality of the extender was ≥295-300 mOsmol/kg. To evaluate cryoprotectant toxicity, sperm were incubated with dimethyl sulfoxide (DMSO), N,N-dimethyl acetamide (DMA), methanol, or glycerol at 5, 10, and 15% concentrations. Based on motility, DMSO, DMA, and methanol (≤10%) were less toxic; therefore, sperm were cryopreserved using these cryoprotectants …

Optimized High-Order Derivative And Dissipation Operators Satisfying Summation By Parts, And Applications In Three-Dimensional Multi-Block Evolutions, Peter Diener, Ernst Nils Dorband, Erik Schnetter, Manuel Tiglio

Faculty Publications

We construct optimized high-order finite differencing operators which satisfy summation by parts. Since these operators are not uniquely defined, we consider several optimization criteria: minimizing the bandwidth, the truncation error on the boundary points, the spectral radius, or a combination of these. We examine in detail a set of operators that are up to tenth order accurate in the interior, and we surprisingly find that a combination of these optimizations can improve the operators' spectral radius and accuracy by orders of magnitude in certain cases. We also construct high-order dissipation operators that are compatible with these new finite difference operators …

Relational Physics With Real Rods And Clocks And The Measurement Problem Of Quantum Mechanics, Rodolfo Gambini, Jorge Pullin

Faculty Publications

The use of real clocks and measuring rods in quantum mechanics implies a natural loss of unitarity in the description of the theory. We briefly review this point and then discuss the implications it has for the measurement problem in quantum mechanics. The intrinsic loss of coherence allows to circumvent some of the usual objections to the measurement process as due to environmental decoherence. © Springer Science+Business Media, LLC 2007.

A Comparison Of Ionic Liquids To Molecular Organic Solvents As Additives For Chiral Separations In Micellar Electrokinetic Chromatorgraphy, Simon M. Mwongela, Noreen Siminialayi, Kristin A. Fletcher, Isiah M. Warner

Faculty Publications

In this study, we report the effects of adding ionic liquids (ILs), as compared to adding conventional molecular organic solvents (MOSs), to aqueous buffer solutions containing molecular micelles in the separation of chiral analyte mixtures in micellar EKC (MEKC). The molecular micelle used in this study was polysodium oleyl-L-leucylvalinate (poly-L-SOLV). The ILs were 1-alkyl-3-methylimidazolium tetrafluoroborate, where the alkyl group was ethyl, butyl, hexyl, or octyl. These ILs were chosen due to their hydrophobicity, good solvating, and electrolyte properties. Thus, it was expected that these ILs would have favorable interactions with chiral analytes and not adversely affect the background current. Common …

The Extrinsic Proteins Of Photosystem Ii, Johnna L. Roose, Kimberly M. Wegener, Himadri B. Pakrasi

Faculty Publications

Years of genetic, biochemical, and structural work have provided a number of insights into the oxygen evolving complex (OEC) of Photosystem II (PSII) for a variety of photosynthetic organisms. However, questions still remain about the functions and interactions among the various subunits that make up the OEC. After a brief introduction to the individual subunits Psb27, PsbP, PsbQ, PsbR, PsbU, and PsbV, a current picture of the OEC as a whole in cyanobacteria, red algae, green algae, and higher plants will be presented. Additionally, the role that these proteins play in the dynamic life cycle of PSII will be discussed. …

Applications Of Chitosan For Improvement Of Quality And Shelf Life Of Foods: A Review, H. K. No, S. P. Meyers, W. Prinyawiwatkul, Z. Xu

Faculty Publications

Chitosan is a modified, natural biopolymer derived by deacetylation of chitin, a major component of the shells of crustacean. Recently, chitosan has received increased attention for its commercial applications in the biomedical, food, and chemical industries. Use of chitosan in food industry is readily seen due to its several distinctive biological activities and functional properties. The antimicrobial activity and film-forming property of chitosan make it a potential source of food preservative or coating material of natural origin. This review focuses on the applications of chitosan for improvement of quality and shelf life of various foods from agriculture, poultry, and seafood …

Impacts Of Hurricanes Katrina And Rita On The Microbial Landscape Of The New Orleans Area, C. D. Sinigalliano, M. L. Gidley, T. Shibata, D. Whitman, T. H. Dixon, E. Laws, A. Hou, D. Bachoon, L. Brand, L. Amaral-Zettler, R. J. Gast, G. F. Steward, O. D. Nigro, R. Fujioka, W. Q. Betancourf, G. Vithanage, J. Mathews, L. E. Fleming, H. M. Solo-Gabriele

Faculty Publications

Floodwaters in New Orleans from Hurricanes Katrina and Rita were observed to contain high levels of fecal indicator bacteria and microbial pathogens, generating concern about long-term impacts of these floodwaters on the sediment and water quality of the New Orleans area and Lake Pontchartrain. We show here that fecal indicator microbe concentrations in offshore waters from Lake Pontchartrain returned to prehurricane concentrations within 2 months of the flooding induced by these hurricanes. Vibrio and Legionella species within the lake were more abundant in samples collected shortly after the floodwaters had receded compared with samples taken within the subsequent 3 months; …

Analysis Of The Tfc6 Promoter In Saccharomyces Cerevisiae: Transcriptional Regulation Through Tf Iiic Binding At Etc6, Daniel Edwards

Honors Capstones

No abstract provided.

Retroposition And Evolution Of The Dna-Binding Motifs Of Yy1, Yy2 And Rex1, Jeong Do Kim, Christopher Faulk, Joomyeong Kim

Faculty Publications

YY1 is a DNA-binding transcription factor found in both vertebrates and invertebrates. Database searches identified 62 YY1 related sequences from all the available genome sequences ranging from flying insects to human. These sequences are characterized by high levels of sequence conservation, ranging from 66% to 100% similarity, in the zinc finger DNA-binding domain of the predicted proteins. Phylogenetic analyses uncovered duplication events of YY1 in several different lineages, including flies, fish and mammals. Retroposition is responsible for generating one duplicate in flies, PHOL from PHO, and two duplicates in placental mammals, YY2 and Reduced Expression 1 (REX1) from YY1. DNA-binding …

Feminism Divided: Feminists For Life Of America And The National Organization For Women, Monique Daley

Honors Capstones

No abstract provided.

“The Little Black Dress Of Scandals”: The Significance Of The Profumo Affair, Leslie Bourgeois

Honors Capstones

No abstract provided.

Video Game Addiction: Truth Or Fiction, Lyles Thibodeaux-Harmony

Honors Capstones

No abstract provided.

The Future Of Viewer Control On Television Advertising, Sally O’Rourke

Honors Capstones

No abstract provided.