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Cognitive Conflict Adaptation In Generalized Anxiety Disorder, Scott A. Baldwin, Michael J. Larson, Ann Clawson, Peter E. Clayson Sep 2013

Cognitive Conflict Adaptation In Generalized Anxiety Disorder, Scott A. Baldwin, Michael J. Larson, Ann Clawson, Peter E. Clayson

Faculty Publications

ndividuals with generalized anxiety disorder (GAD) display poor emotional conflict adaptation, a cogni- tive control process requiring the adjustment of performance based on previous-trial conflict. It is unclear whether GAD-related conflict adaptation difficulties are present during tasks without emotionally-salient stimuli. We examined conflict adaptation using the N2 component of the event-related potential (ERP) and behavioral responses on a Flanker task from 35 individuals with GAD and 35 controls. Groups did not differ on conflict adaptation accuracy; individuals with GAD also displayed intact RT conflict adaptation. In contrast, individuals with GAD showed decreased amplitude N2 principal component for conflict adap- tation. …

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An Ion's Perspective On The Molecular Motions Of Nanoconfined Water: A Two-Dimensional Infrared Spectroscopy Study, Prabhat K. Singh, Daniel G. Kuroda, Robin M. Hochstrasser Aug 2013

An Ion's Perspective On The Molecular Motions Of Nanoconfined Water: A Two-Dimensional Infrared Spectroscopy Study, Prabhat K. Singh, Daniel G. Kuroda, Robin M. Hochstrasser

Faculty Publications

The vibrational population relaxation and hydration shell dynamics of the symmetric tricyanomethanide (TCM) anion are investigated in a sodium bis(2-ethylhexyl)sulfosuccinate reverse micelle as a function of the water pool radius. Two-dimensional infrared (IR) spectroscopy in combination with linear absorption and ultrafast IR pump-probe spectroscopy is utilized in this study. Spectroscopic measurements show that the anion has two bands in the 2160-2175 cm-1 region, each with its own spectroscopic signatures. Analysis of the vibrational dynamics shows that the two vibrational bands are consistent with the anion located either at the interface or in the water pool. The sensitivity of the TCM …

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Protein Structure Validation And Identification From Unassigned Residual Dipolar Coupling Data Using 2d-Pdpa, Arjang Fahim, Rishi Mukhopadhyay, Ryan Yandle, James H. Prestegard, Homayoun Valafar Aug 2013

Protein Structure Validation And Identification From Unassigned Residual Dipolar Coupling Data Using 2d-Pdpa, Arjang Fahim, Rishi Mukhopadhyay, Ryan Yandle, James H. Prestegard, Homayoun Valafar

Faculty Publications

More than 90% of protein structures submitted to the PDB each year are homologous to some previously characterized protein structure. The extensive resources that are required for structural characterization of proteins can be justified for the 10% of the novel structures, but not for the remaining 90%. This report presents the 2D-PDPA method, which utilizes unassigned residual dipolar coupling in order to address the economics of structure determination of routine proteins by reducing the data acquisition and processing time. 2D-PDPA has been demonstrated to successfully identify the correct structure of an array of proteins that range from 46 to 445 …

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Experimental Demonstration Of Accelerated Extinction In Source-Sink Metapopulations, John M. Drake, Blaine D. Griffen Aug 2013

Experimental Demonstration Of Accelerated Extinction In Source-Sink Metapopulations, John M. Drake, Blaine D. Griffen

Faculty Publications

Population extinction is a fundamental ecological process which may be aggravated by the exchange of organisms between productive (source) and unproductive (sink) habitat patches. The extent to which such source-sink exchange affects extinction rates is unknown. We conducted an experiment in which metapopulation effects could be distinguished from source-sink effects in laboratory populations of Daphnia magna. Time-to-extinction in this experiment was maximized at intermediate levels of habitat fragmentation, which is consistent with a minority of theoretical models. These results provided a baseline for comparison with experimental treatments designed to detect effects of concentrating resources in source patches. These treatments showed …

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A Supramolecular Strategy To Assemble Multifunctional Viral Nanoparticles, Limin Chen, Xia Zhao, Yuan Lin, Yubin Huang, Qian Wang Aug 2013

A Supramolecular Strategy To Assemble Multifunctional Viral Nanoparticles, Limin Chen, Xia Zhao, Yuan Lin, Yubin Huang, Qian Wang

Faculty Publications

Using a one-pot approach driven by the supramolecular interaction between β-cyclodextrin and adamantyl moieties, multifunctional viral nanoparticles can be facilely formulated for biomedical applications.

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Frontiers, Opportunities, And Challenges In Biochemical And Chemical Catalysis Of Co2 Fixation, Aaron M. Appel, John E. Bercaw, Andrew B. Bocarsly, Holger Dobbek, Daniel L. Dubois, Michel Dupuis, James G. Ferry, Etsuko Fujita, Russ Hille, Paul J.A. Kenis, Cheryl A. Kerfeld, Robert H. Morris, Charles H.F. Peden, Archie R. Portis, Stephen W. Ragsdale, Thomas B. Rauchfuss, Joost N.H. Reek, Lance C. Seefeldt, Rudolf K. Thauer, Grover L. Waldrop Aug 2013

Frontiers, Opportunities, And Challenges In Biochemical And Chemical Catalysis Of Co2 Fixation, Aaron M. Appel, John E. Bercaw, Andrew B. Bocarsly, Holger Dobbek, Daniel L. Dubois, Michel Dupuis, James G. Ferry, Etsuko Fujita, Russ Hille, Paul J.A. Kenis, Cheryl A. Kerfeld, Robert H. Morris, Charles H.F. Peden, Archie R. Portis, Stephen W. Ragsdale, Thomas B. Rauchfuss, Joost N.H. Reek, Lance C. Seefeldt, Rudolf K. Thauer, Grover L. Waldrop

Faculty Publications

The article discusses opportunities and challenges in biochemical and chemical catalysis of carbon dioxide fixation. All biological systems must extract energy from their environments to carry out the metabolic processes associated with life itself. Living organisms have evolved to exist in an amazing variety of environments, and they can use and interconvert energy from a variety of sources. The enzymes required to carry out these important metabolic pathways have evolved over billions of years, and they use readily abundant materials from the environment to achieve these important energy conversion processes. All of these metabolic pathways involve the storage and utilization …

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Rates And Patterns Of Great Ape Retrotransposition, Fereydoun Hormozdiari, Miriam K. Konkel, Javier Prado-Martinez, Giorgia Chiatante, Irene Hernando Herraez, Jerilyn A. Walker, Benjamin Nelson, Can Alkan, Peter H. Sudmant, John Huddleston, Claudia R. Catacchio, Arthur Ko, Maika Malig, Carl Baker, Tomas Marques-Bonet, Mario Ventura, Mark A. Batzer, Evan E. Eichler Aug 2013

Rates And Patterns Of Great Ape Retrotransposition, Fereydoun Hormozdiari, Miriam K. Konkel, Javier Prado-Martinez, Giorgia Chiatante, Irene Hernando Herraez, Jerilyn A. Walker, Benjamin Nelson, Can Alkan, Peter H. Sudmant, John Huddleston, Claudia R. Catacchio, Arthur Ko, Maika Malig, Carl Baker, Tomas Marques-Bonet, Mario Ventura, Mark A. Batzer, Evan E. Eichler

Faculty Publications

We analyzed 83 fully sequenced great ape genomes for mobile element insertions, predicting a total of 49,452 fixed and polymorphic Alu and long interspersed element 1 (L1) insertions not present in the human reference assembly and assigning each retrotransposition event to a different time point during great ape evolution. We used these homoplasy-free markers to construct a mobile element insertions-based phylogeny of humans and great apes and demonstrate their differential power to discern ape subspecies and populations. Within this context, we find a good correlation between L1 diversity and single-nucleotide polymorphism heterozygosity (r2 =0.65) in contrast to Alu repeats, which …

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Jellyfish Body Plans Provide Allometric Advantages Beyond Low Carbon Content, Kylie A. Pitt, Carlos M. Duarte, Cathy H. Lucas, Kelly R. Sutherland, Robert H. Condon, Hermes Mianzan, Jennifer E. Purcell, Kelly L. Robinson, Shin-Ichi Uye Aug 2013

Jellyfish Body Plans Provide Allometric Advantages Beyond Low Carbon Content, Kylie A. Pitt, Carlos M. Duarte, Cathy H. Lucas, Kelly R. Sutherland, Robert H. Condon, Hermes Mianzan, Jennifer E. Purcell, Kelly L. Robinson, Shin-Ichi Uye

Faculty Publications

Jellyfish form spectacular blooms throughout the world's oceans. Jellyfish body plans are characterised by high water and low carbon contents which enables them to grow much larger than non-gelatinous animals of equivalent carbon content and to deviate from non-gelatinous pelagic animals when incorporated into allometric relationships. Jellyfish have, however, been argued to conform to allometric relationships when carbon content is used as the metric for comparison. Here we test the hypothesis that differences in allometric relationships for several key functional parameters remain for jellyfish even after their body sizes are scaled to their carbon content. Data on carbon and nitrogen …

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A Hierarchical Coarse-Grained (All-Atom-To-All-Residue) Computer Simulation Approach: Self-Assembly Of Peptides, Ras B. Pandey, Zhifeng Kuang, Barry L. Farmer Aug 2013

A Hierarchical Coarse-Grained (All-Atom-To-All-Residue) Computer Simulation Approach: Self-Assembly Of Peptides, Ras B. Pandey, Zhifeng Kuang, Barry L. Farmer

Faculty Publications

A hierarchical computational approach (all-atom residue to all-residue peptide) is introduced to study self-organizing structures of peptides as a function of temperature. A simulated residue-residue interaction involving all-atom description, analogous to knowledge-based analysis (with different input), is used as an input to a phenomenological coarse-grained interaction for large scales computer simulations. A set of short peptides P1 (1H 2S 3S 4Y 5W 6Y 7A 8F 9N 10N 11K 12T) is considered as an example to illustrate the utility. We find that peptides assemble rather fast into globular …

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Effect Of Depth Of Flooding On The Rice Water Weevil, Lissorhoptrus Oryzophilus, And Yield Of Rice, Kelly V. Tindall, John L. Bernhardt, Michael J. Stout, Donn H. Beighley Aug 2013

Effect Of Depth Of Flooding On The Rice Water Weevil, Lissorhoptrus Oryzophilus, And Yield Of Rice, Kelly V. Tindall, John L. Bernhardt, Michael J. Stout, Donn H. Beighley

Faculty Publications

The rice water weevil, Lissorhoptrus oryzophilus (Kuschel) (Coleoptera: Curculionidae), is a semi-aquatic pest of rice and is the most destructive insect pest of rice in the United States. Adults oviposit after floods are established, and greenhouse studies have shown that plants exposed to deep floods have more eggs oviposited in leaf sheaths than plants exposed to a shallow flood. Experiments were conducted in three mid-southern states in the USA to determine if the depth of flooding would impact numbers of L. oryzophilus on rice plants under field conditions. Rice was flooded at depths of approximately 5 or 10 cm in …

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Radiolytic Mapping Of Solvent-Contact Surfaces In Photosystem Ii Of Higher Plants: Experimental Identification Of Putative Water Channels Within The Photosystem, Laurie K. Frankel, Larry Sallans, Henry Bellamy, Jost S. Goettert, Patrick A. Limbach, Terry M. Bricker Aug 2013

Radiolytic Mapping Of Solvent-Contact Surfaces In Photosystem Ii Of Higher Plants: Experimental Identification Of Putative Water Channels Within The Photosystem, Laurie K. Frankel, Larry Sallans, Henry Bellamy, Jost S. Goettert, Patrick A. Limbach, Terry M. Bricker

Faculty Publications

Background: Substrate water must reach the buried Mn4O 5Ca cluster in Photosystem II. Results: OH produced by radiolysis modified buried amino acid residues. These were mapped onto the PS II crystal structure. Conclusion: Two groups of oxidized residues were identified which form putative pathways to the Mn4O5Ca cluster. Significance: Identification of water and oxygen channels is crucial for our understanding of Photosystem II function. © 2013 by The American Society for Biochemistry and Molecular Biology, Inc.

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Habitat Filtering Across Tree Life Stages In Tropical Forest Communities, C. A. Baldeck, K. E. Harms, J. B. Yavitt, R. John, B. L. Turner, R. Valencia, H. Navarrete, S. Bunyavejchewin, S. Kiratiprayoon, A. Yaacob, M. N.N. Supardi, S. J. Davies, S. P. Hubbell, G. B. Chuyong, D. Kenfack, D. W. Thomas, J. W. Dalling Aug 2013

Habitat Filtering Across Tree Life Stages In Tropical Forest Communities, C. A. Baldeck, K. E. Harms, J. B. Yavitt, R. John, B. L. Turner, R. Valencia, H. Navarrete, S. Bunyavejchewin, S. Kiratiprayoon, A. Yaacob, M. N.N. Supardi, S. J. Davies, S. P. Hubbell, G. B. Chuyong, D. Kenfack, D. W. Thomas, J. W. Dalling

Faculty Publications

Tropical tree communities are shaped by local-scale habitat heterogeneity in the form of topographic and edaphic variation, but the life-history stage at which habitat associations develop remains poorly understood. This is due, in part, to the fact that previous studies have not accounted for the widely disparate sample sizes number of stems that result when trees are divided into size classes. We demonstrate that the observed habitat structuring of a community is directly related to the number of individuals in the community. We then compare the relative importance of habitat heterogeneity to tree community structure for saplings, juveniles and adult …

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Evolver: An Optimization Engine For Evolving Protein Sequences To Stabilize The Respective Structures, Michal Brylinski Aug 2013

Evolver: An Optimization Engine For Evolving Protein Sequences To Stabilize The Respective Structures, Michal Brylinski

Faculty Publications

Background: Many structural bioinformatics approaches employ sequence profile-based threading techniques. To improve fold recognition rates, homology searching may include artificially evolved amino acid sequences, which were demonstrated to enhance the sensitivity of protein threading in targeting midnight zone templates. Findings. We describe implementation details of eVolver, an optimization algorithm that evolves protein sequences to stabilize the respective structures by a variety of potentials, which are compatible with those commonly used in protein threading. In a case study focusing on LARG PDZ domain, we show that artificially evolved sequences have quite high capabilities to recognize the correct protein structures using standard …

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Cross-Species Malaria Immunity Induced By Chemically Attenuated Parasites, Michael F. Good, Jennifer M. Reiman, I. Bibiana Rodriguez, Koichi Ito, Stephanie K. Yanow, Ibrahim M. El-Deeb, Michael R. Batzloff, Danielle I. Stanisic, Christian Engwerda, Terry Spithill, Stephen L. Hoffman, Moses Lee, Virginia Mcphun Aug 2013

Cross-Species Malaria Immunity Induced By Chemically Attenuated Parasites, Michael F. Good, Jennifer M. Reiman, I. Bibiana Rodriguez, Koichi Ito, Stephanie K. Yanow, Ibrahim M. El-Deeb, Michael R. Batzloff, Danielle I. Stanisic, Christian Engwerda, Terry Spithill, Stephen L. Hoffman, Moses Lee, Virginia Mcphun

Faculty Publications

Vaccine development for the blood stages of malaria has focused on the induction of antibodies to parasite surface antigens, most of which are highly polymorphic. An alternate strategy has evolved from observations that low-density infections can induce antibody-independent immunity to different strains. To test this strategy, we treated parasitized red blood cells from the rodent parasite Plasmodium chabaudi with secocyclopropyl pyrrolo indole analogs. These drugs irreversibly alkylate parasite DNA, blocking their ability to replicate. After administration in mice, DNA from the vaccine could be detected in the blood for over 110 days and a single vaccination induced profound immunity to …

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Natural Variation And The Capacity To Adapt To Ocean Acidification In The Keystone Sea Urchin Strongylocentrotus Purpuratus, Morgan W. Kelly, Jacqueline L. Padilla-Gamiño, Gretchen E. Hofmann Aug 2013

Natural Variation And The Capacity To Adapt To Ocean Acidification In The Keystone Sea Urchin Strongylocentrotus Purpuratus, Morgan W. Kelly, Jacqueline L. Padilla-Gamiño, Gretchen E. Hofmann

Faculty Publications

A rapidly growing body of literature documents the potential negative effects of CO2-driven ocean acidification (OA) on marine organisms. However, nearly all this work has focused on the effects of future conditions on modern populations, neglecting the role of adaptation. Rapid evolution can alter demographic responses to environmental change, ultimately affecting the likelihood of population persistence, but the capacity for adaptation will differ among populations and species. Here, we measure the capacity of the ecologically important purple sea urchin Strongylocentrotus purpuratus to adapt to OA, using a breeding experiment to estimate additive genetic variance for larval size (an important component …

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Tris(4-Formylphenyl)Phosphane Oxide Tetrahydrofuran Hemisolvate, James Kakoullis, Frank R. Fronczek, Andrew W. Maverick Aug 2013

Tris(4-Formylphenyl)Phosphane Oxide Tetrahydrofuran Hemisolvate, James Kakoullis, Frank R. Fronczek, Andrew W. Maverick

Faculty Publications

The title compound, C21H15O4P·0.5C4H8O, contains an ordered phosphane oxide in a general position and a tetrahydrofuran solvent molecule disordered about a twofold axis. All three aldehyde substituents are nearly coplanar with their attached benzene rings, with C - C - C - O torsion angles in the range 1.64 (17)-4.24 (19)°. All three have different conformations with respect to the P=O group, one syn, one anti, and one gauche. Two of the aldehyde substituents form intermolecular C - H⋯O contacts.

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Adaptation And The Physiology Of Ocean Acidification, Morgan W. Kelly, Gretchen E. Hofmann Aug 2013

Adaptation And The Physiology Of Ocean Acidification, Morgan W. Kelly, Gretchen E. Hofmann

Faculty Publications

Ocean acidification, caused by the uptake of atmospheric CO2, is a threat to marine biodiversity, potentially rivalling the threat imposed by rising temperatures in some marine ecosystems. Although a growing body of literature documents negative effects of acidification on marine organisms, the majority of this work has focused on the effects of future conditions on modern populations, ignoring the potential effects of adaptation and physiological acclimatization. We review current literature on the potential for adaptation to elevated pCO2 in marine organisms. Although this body of work is currently quite small, we argue that data on the physiological effects of acidification, …

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Population Dynamics Of Three Aphid Species (Hemiptera: Aphididae) On Four Ipomoea Spp. Infected Or Noninfected With Sweetpotato Potyviruses, E. N. Wosula, J. A. Davis, C. A. Clark Aug 2013

Population Dynamics Of Three Aphid Species (Hemiptera: Aphididae) On Four Ipomoea Spp. Infected Or Noninfected With Sweetpotato Potyviruses, E. N. Wosula, J. A. Davis, C. A. Clark

Faculty Publications

Three aphid species, Aphis gossypii Glover and Myzus persicae (Sulzer) (efficient sweetpotato potyvirus vectors) and Rhopalosiphum padi (L.) (an inefficient vector), are commonly found in sweet potato, Ipomoea batatas (L.), in Louisiana. Field-grown sweet potatoes are naturally infected with several potyviruses: Sweet potato feathery mottle virus, Sweet potato virus G, and Sweet potato virus 2. Thus, these aphids commonly encounter virus-infected hosts. What is not known is how each of these aphids responds to sweet potato, either infected or virus-free. The objectives of this study were to 1) determine if these aphid species can colonize mixed virus-infected sweet potato 'Beau-regard', …

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Species Composition And Seasonal Abundance Of Stink Bugs (Hemiptera: Pentatomidae) In Louisiana Soybean, J. H. Temple, J. A. Davis, S. Micinski, J. T. Hardke, P. Price, B. R. Leonard Aug 2013

Species Composition And Seasonal Abundance Of Stink Bugs (Hemiptera: Pentatomidae) In Louisiana Soybean, J. H. Temple, J. A. Davis, S. Micinski, J. T. Hardke, P. Price, B. R. Leonard

Faculty Publications

In Louisiana during the last decade, the redbanded stink bug, Piezodorus guildinii (Westwood), has become a significant and yield-limiting pest of soybean. The redbanded stink bug was previously reported in the United States in 1892, but was never considered an economically important pest until recently. Soybeans representing four maturity groups (MG) III, IV, V, and VI were sampled weekly from beginning bloom (R1) to physiological maturity (R8) during 2008-2010 at five locations across Louisiana to determine the Pentatomidae composition. In total, 13,146 stink bugs were captured and subsequently identified to species. The predominant species included the redbanded stink bug (54.2%); …

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Systematic Review Of Three Decades Of Spanish Cardiovascular Epidemiology: Improving Translation For A Future Of Prevention, Manuel Franco, Usama Bilal, Eliseo Guallar, Ginés Sanz, Alicia F. Gómez, Valentín Fuster, Richard Cooper Aug 2013

Systematic Review Of Three Decades Of Spanish Cardiovascular Epidemiology: Improving Translation For A Future Of Prevention, Manuel Franco, Usama Bilal, Eliseo Guallar, Ginés Sanz, Alicia F. Gómez, Valentín Fuster, Richard Cooper

Faculty Publications

Background: In order to improve national cardiovascular disease (CVD) epidemiology and prevention, we systematically reviewed and analyzed the relevant literature produced in the last three decades for Spain. Design: Systematic Review. Methods: We searched for all the articles aiming to monitor CVD clinical endpoints and risk factors in the Spanish general population that were indexed in MEDLINE and EMBASE. Based on international recommendations, we analyzed each article with a three-level scoring system (low to high) for the following criteria: data quality, representativeness and translation of results into preventive interventions. Results: We reviewed 2565 articles, selecting 314 for in-depth analysis. Articles …

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Host-Microbe Interactions In Caenorhabditis Elegans, Rui Zhang, Aixin Hou Aug 2013

Host-Microbe Interactions In Caenorhabditis Elegans, Rui Zhang, Aixin Hou

Faculty Publications

No abstract provided.

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Sparstolonin B Inhibits Pro-Angiogenic Functions And Blocks Cell Cycle Progression In Endothelial Cells, H. R. Bateman, Q. Liang, D. Fan, V. Rodriguez, Susan M. Lessner Aug 2013

Sparstolonin B Inhibits Pro-Angiogenic Functions And Blocks Cell Cycle Progression In Endothelial Cells, H. R. Bateman, Q. Liang, D. Fan, V. Rodriguez, Susan M. Lessner

Faculty Publications

Sparstolonin B (SsnB) is a novel bioactive compound isolated from Sparganium stoloniferum, an herb historically used in Traditional Chinese Medicine as an anti-tumor agent. Angiogenesis, the process of new capillary formation from existing blood vessels, is dysregulated in many pathological disorders, including diabetic retinopathy, tumor growth, and atherosclerosis. In functional assays, SsnB inhibited endothelial cell tube formation (Matrigel method) and cell migration (Transwell method) in a dose-dependent manner. Microarray experiments with human umbilical vein endothelial cells (HUVECs) and human coronary artery endothelial cells (HCAECs) demonstrated differential expression of several hundred genes in response to SsnB exposure (916 and 356 …

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Human-Relevant Levels Of Added Sugar Consumption Increase Female Mortality And Lower Male Fitness In Mice, James Ruff, Amanda Suchy, Sara Hugentobler, Mirtha Sosa, Bradley Schwartz, Linda Morrison, Sin Gieng, Mark Shigenaga, Wayne Potts Aug 2013

Human-Relevant Levels Of Added Sugar Consumption Increase Female Mortality And Lower Male Fitness In Mice, James Ruff, Amanda Suchy, Sara Hugentobler, Mirtha Sosa, Bradley Schwartz, Linda Morrison, Sin Gieng, Mark Shigenaga, Wayne Potts

Faculty Publications

Consumption of added sugar has increased over recent decades and is correlated with numerous diseases. Rodent models have elucidated mechanisms of toxicity, but only at concentrations beyond typical human exposure. Here we show that comparatively low levels of added sugar consumption have substantial negative effects on mouse survival, competitive ability, and reproduction. Using Organismal Performance Assays—in which mice fed human-relevant concentrations of added sugar (25% kcal from a mixture of fructose and glucose, modeling high fructose corn syrup) and control mice compete in seminatural enclosures for territories, resources and mates—we demonstrate that fructose/glucose-fed females experience a twofold increase in mortality …

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A New Species Of Roeboides (Teleostei: Characidae) From Costa Rica And Panama, With A Key To The Middle American Species Of The Genus, Wilfredo A. Matamoros, Prosanta Chakrabarty, Arturo Angulo, Carlos A. Garita-Alvarado, Caleb D. Mcmahan Jul 2013

A New Species Of Roeboides (Teleostei: Characidae) From Costa Rica And Panama, With A Key To The Middle American Species Of The Genus, Wilfredo A. Matamoros, Prosanta Chakrabarty, Arturo Angulo, Carlos A. Garita-Alvarado, Caleb D. Mcmahan

Faculty Publications

A new species of Roeboides is described from the Pacific slope of Costa Rica and Panama. Roeboides bussingi differs from all other Central American Roeboides and all members of the R. guatemalensis species group by the following combination of characters: presence of 18-22 scales above the lateral line (vs. 12-16 in R. dientito); 15-22 scales below the lateral line (vs. 10-14 in R. dientito, and 20-24 in R. loftini); an inconspicuous, sometimes absent, crescent-shaped humeral spot (vs. a large round, conspicuous humeral spot in R. carti, R. dayi, R. dientonito, R. ilseae, R. loftini, and R. occidentalis); a small wedge-shaped …

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Positive Equilibrium Solutions To General Population Model, Joon Hyuk Kang Jul 2013

Positive Equilibrium Solutions To General Population Model, Joon Hyuk Kang

Faculty Publications

In this paper, we investigate conditions for the existence of positive solution to the following general elliptic system with various growth conditions: {Δu + u(a + g(u, v)) = 0 Δv + v(d + h(u, v)) = 0 u|∂ω=v|∂ω=0 in ω. Our arguments mainly rely on super-sub solutions, maximum principles, spectrum estimates, and some detailed properties for the solution of logistic equations. © 2013 Academic Publications, Ltd.

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Predicted Risks Of Radiogenic Cardiac Toxicity In Two Pediatric Patients Undergoing Photon Or Proton Radiotherapy, Rui Zhang, Rebecca M. Howell, Kenneth Homann, Annelise Giebeler, Phillip J. Taddei, Anita Mahajan, Wayne D. Newhauser Jul 2013

Predicted Risks Of Radiogenic Cardiac Toxicity In Two Pediatric Patients Undergoing Photon Or Proton Radiotherapy, Rui Zhang, Rebecca M. Howell, Kenneth Homann, Annelise Giebeler, Phillip J. Taddei, Anita Mahajan, Wayne D. Newhauser

Faculty Publications

Background: Hodgkin disease (HD) and medulloblastoma (MB) are common malignancies found in children and young adults, and radiotherapy is part of the standard treatment. It was reported that these patients who received radiation therapy have an increased risk of cardiovascular late effects. We compared the predicted risk of developing radiogenic cardiac toxicity after photon versus proton radiotherapies for a pediatric patient with HD and a pediatric patient with MB.Methods: In the treatment plans, each patient's heart was contoured in fine detail, including substructures of the pericardium and myocardium. Risk calculations took into account both therapeutic and stray radiation doses. We …

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Genetic Analysis Of Population Structure And Reproductive Mode Of The Termite Reticulitermes Chinensis Snyder, Qiuying Huang, Ganghua Li, Claudia Husseneder, Chaoliang Lei Jul 2013

Genetic Analysis Of Population Structure And Reproductive Mode Of The Termite Reticulitermes Chinensis Snyder, Qiuying Huang, Ganghua Li, Claudia Husseneder, Chaoliang Lei

Faculty Publications

The subterranean termite Reticulitermes chinensis Snyder is an important pest of trees and buildings in China. Here, we characterized genetic structure and reproductive modes of R. chinensis from China for the first time. A total of 1,875 workers from 75 collection sites in Huanggang, Changsha and Chongqing cities were genotyped at eight microsatellite loci. Analysis of genetic clusters showed two subpopulations in Chongqing city. The Huanggang population showed a uniform genetic pattern and was separated from the other populations by the largest genetic distances (FST: 0.17-0.20). In contrast, smaller genetic distances (FST: 0.05-0.12) separated Changsha, Chongqing-1 and Chongqing-2 populations. Chongqing-1 …

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Searching For Stable SiNCN Clusters: Combination Of Stochastic Potential Surface Search And Pseudopotential Plane-Wave Car-Parinello Simulated Annealing Simulations, Xiaofeng F. Duan, Lingyu Huang, Larry W. Burggraf Jul 2013

Searching For Stable SiNCN Clusters: Combination Of Stochastic Potential Surface Search And Pseudopotential Plane-Wave Car-Parinello Simulated Annealing Simulations, Xiaofeng F. Duan, Lingyu Huang, Larry W. Burggraf

Faculty Publications

To find low energy SinCn structures out of hundreds to thousands of isomers we have developed a general method to search for stable isomeric structures that combines Stochastic Potential Surface Search and Pseudopotential Plane-Wave Density Functional Theory Car-Parinello Molecular Dynamics simulated annealing (PSPW-CPMD-SA). We enhanced the Sunders stochastic search method to generate random cluster structures used as seed structures for PSPW-CPMD-SA simulations. This method ensures that each SA simulation samples a different potential surface region to find the regional minimum structure. By iterations of this automated, parallel process on a high performance computer we located hundreds to …

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Electron Transfer By Excited Benzoquinone Anions: Slow Rates For Two-Electron Transitions, Matibur Zamadar, Andrew R. Cook, Anna Lewandowska-Andralojc, Richard Holroyd, Yan Jiang, Jin Bikalis, John R. Miller Jul 2013

Electron Transfer By Excited Benzoquinone Anions: Slow Rates For Two-Electron Transitions, Matibur Zamadar, Andrew R. Cook, Anna Lewandowska-Andralojc, Richard Holroyd, Yan Jiang, Jin Bikalis, John R. Miller

Faculty Publications

Electron transfer (ET) rate constants from the lowest excited state of the radical anion of benzoquinone, BQ−•*, were measured in THF solution. Rate constants for bimolecular electron transfer reactions typically reach the diffusion-controlled limit when the free-energy change, ΔG°, reaches −0.3 eV. The rate constants for ET from BQ−•* are one-to-two decades smaller at this energy and do not reach the diffusion-controlled limit until −ΔG° is 1.5−2.0 eV. The rates are so slow probably because a second electron must also undergo a transition to make use of the energy of the excited state. Similarly, ET, from solvated electrons to neutral …

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Transcriptional Profiling Of Sweetpotato (Ipomoea Batatas) Roots Indicates Down-Regulation Of Lignin Biosynthesis And Up-Regulation Of Starch Biosynthesis At An Early Stage Of Storage Root Formation, Nurit Firon, Don Labonte, Arthur Villordon, Yanir Kfir, Julio Solis, Evgenia Lapis, Temima Schnitzer Perlman, Adi Doron-Faigenboim, Amots Hetzroni, Leviah Althan, Lahan Adani Nadir Jul 2013

Transcriptional Profiling Of Sweetpotato (Ipomoea Batatas) Roots Indicates Down-Regulation Of Lignin Biosynthesis And Up-Regulation Of Starch Biosynthesis At An Early Stage Of Storage Root Formation, Nurit Firon, Don Labonte, Arthur Villordon, Yanir Kfir, Julio Solis, Evgenia Lapis, Temima Schnitzer Perlman, Adi Doron-Faigenboim, Amots Hetzroni, Leviah Althan, Lahan Adani Nadir

Faculty Publications

Background: The number of fibrous roots that develop into storage roots determines sweetpotato yield. The aim of the present study was to identify the molecular mechanisms involved in the initiation of storage root formation, by performing a detailed transcriptomic analysis of initiating storage roots using next-generation sequencing platforms. A two-step approach was undertaken: (1) generating a database for the sweetpotato root transcriptome using 454-Roche sequencing of a cDNA library created from pooled samples of two root types: fibrous and initiating storage roots; (2) comparing the expression profiles of initiating storage roots and fibrous roots, using the Illumina Genome Analyzer to …

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