Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Louisiana State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 6241 - 6270 of 13619

Full-Text Articles in Entire DC Network

Dynamic Edge Effects In Small Mammal Communities Across A Conservation-Agricultural Interface In Swaziland, Zachary M. Hurst, Robert A. Mccleery, Bret A. Collier, Robert J. Fletcher, Nova J. Silvy, Peter J. Taylor, Ara Monadjem Sep 2013

Dynamic Edge Effects In Small Mammal Communities Across A Conservation-Agricultural Interface In Swaziland, Zachary M. Hurst, Robert A. Mccleery, Bret A. Collier, Robert J. Fletcher, Nova J. Silvy, Peter J. Taylor, Ara Monadjem

Faculty Publications

Across the planet, high-intensity farming has transformed native vegetation into monocultures, decreasing biodiversity on a landscape scale. Yet landscape-scale changes to biodiversity and community structure often emerge from processes operating at local scales. One common process that can explain changes in biodiversity and community structure is the creation of abrupt habitat edges, which, in turn, generate edge effects. Such effects, while incredibly common, can be highly variable across space and time; however, we currently lack a general analytical framework that can adequately capture such spatio-temporal variability. We extend previous approaches for estimating edge effects to a non-linear mixed modeling framework …

Go to article

Benchmark Measurements And Simulations Of Dose Perturbations Due To Metallic Spheres In Proton Beams, Wayne D. Newhauser, Laura Rechner, Dragan Mirkovic, Pablo Yepes, Nicholas C. Koch, Uwe Titt, Jonas D. Fontenot, Rui Zhang Sep 2013

Benchmark Measurements And Simulations Of Dose Perturbations Due To Metallic Spheres In Proton Beams, Wayne D. Newhauser, Laura Rechner, Dragan Mirkovic, Pablo Yepes, Nicholas C. Koch, Uwe Titt, Jonas D. Fontenot, Rui Zhang

Faculty Publications

Monte Carlo simulations are increasingly used for dose calculations in proton therapy due to its inherent accuracy. However, dosimetric deviations have been found using Monte Carlo code when high density materials are present in the proton beamline. The purpose of this work was to quantify the magnitude of dose perturbation caused by metal objects. We did this by comparing measurements and Monte Carlo predictions of dose perturbations caused by the presence of small metal spheres in several clinical proton therapy beams as functions of proton beam range and drift space. Monte Carlo codes MCNPX, GEANT4 and Fast Dose Calculator (FDC) …

Go to article

Scientific Teaching Targeting Faculty From Diverse Institutions, Christopher S. Gregg, Jo Dale Ales, Steven M. Pomarico, E. William Wischusen, Joseph F. Siebenaller Sep 2013

Scientific Teaching Targeting Faculty From Diverse Institutions, Christopher S. Gregg, Jo Dale Ales, Steven M. Pomarico, E. William Wischusen, Joseph F. Siebenaller

Faculty Publications

We offered four annual professional development workshops called STAR (for Scientific Teaching, Assessment, and Resources) modeled after the National Academies Summer Institute (SI) on Undergraduate Education in Biology. In contrast to the SI focus on training faculty from research universities, STAR's target was faculty from community colleges, 2-yr campuses, and public and private research universities. Because of the importance of community colleges and 2-yr institutions as entries to higher education, we wanted to determine whether the SI model can be successfully extended to this broader range of institutions. We surveyed the four cohorts; 47 STAR alumni responded to the online …

Go to article

Naringenin Inhibits Adipogenesis And Reduces Insulin Sensitivity And Adiponectin Expression In Adipocytes, Allison J. Richard, Zhaleh Amini-Vaughan, David M. Ribnicky, Jacqueline M. Stephens Sep 2013

Naringenin Inhibits Adipogenesis And Reduces Insulin Sensitivity And Adiponectin Expression In Adipocytes, Allison J. Richard, Zhaleh Amini-Vaughan, David M. Ribnicky, Jacqueline M. Stephens

Faculty Publications

Adipose tissue development and function are widely studied to examine the relationship between obesity and the metabolic syndrome. It is well documented that the inability of adipose tissue to properly increase its lipid storage capacity during the obese state can lead to metabolic dysfunction. In a blind screen of 425 botanicals, we identified naringenin as an inhibitor of adipocyte differentiation. Naringenin is one of the most abundant citrus flavonoids, and recent studies have demonstrated antihyperlipidemic capabilities. These studies have largely focused on the effects of naringenin on the liver. Our biochemical studies clearly demonstrate that naringenin inhibits adipogenesis and impairs …

Go to article

Dynamic Model Constraints On Oxygen-17 Depletion In Atmospheric O 2 After A Snowball Earth, Xiaobin Cao, Huiming Bao Sep 2013

Dynamic Model Constraints On Oxygen-17 Depletion In Atmospheric O 2 After A Snowball Earth, Xiaobin Cao, Huiming Bao

Faculty Publications

A large perturbation in atmospheric CO2 and O2 or bioproductivity will result in a drastic pulse of 17O change in atmospheric O2, as seen in the Marinoan Oxygen-17 Depletion (MOSD) event in the immediate aftermath of a global deglaciation 635 Mya. The exact nature of the perturbation, however, is debated. Here we constructed a coupled, four-box, and quick-response biosphere-atmosphere model to examine both the steady state and dynamics of the MOSD event. Our model shows that the ultra-high CO2 concentrations proposed by the "snowball' Earth hypothesis produce a typical MOSD duration of less than 106 y and a magnitude of …

Go to article

Dynamic Model Constraints On Oxygen-17 Depletion In Atmospheric O 2 After A Snowball Earth, Xiaobin Cao, Huiming Bao Sep 2013

Dynamic Model Constraints On Oxygen-17 Depletion In Atmospheric O 2 After A Snowball Earth, Xiaobin Cao, Huiming Bao

Faculty Publications

A large perturbation in atmospheric CO2 and O2 or bioproductivity will result in a drastic pulse of 17O change in atmospheric O2, as seen in the Marinoan Oxygen-17 Depletion (MOSD) event in the immediate aftermath of a global deglaciation 635 Mya. The exact nature of the perturbation, however, is debated. Here we constructed a coupled, four-box, and quick-response biosphere-atmosphere model to examine both the steady state and dynamics of the MOSD event. Our model shows that the ultra-high CO2 concentrations proposed by the "snowball' Earth hypothesis produce a typical MOSD duration of less than 106 y and a magnitude of …

Go to article

The Importance Of Dissimilatory Nitrate Reduction To Ammonium (Dnra) In The Nitrogen Cycle Of Coastal Ecosystems, Anne E. Giblin, Craig R. Tobias, Bongkeun Song, Nathaniel Weston, Gary T. Banta, Victor H. Rivera-Monroy Sep 2013

The Importance Of Dissimilatory Nitrate Reduction To Ammonium (Dnra) In The Nitrogen Cycle Of Coastal Ecosystems, Anne E. Giblin, Craig R. Tobias, Bongkeun Song, Nathaniel Weston, Gary T. Banta, Victor H. Rivera-Monroy

Faculty Publications

Until recently, it was believed that biological assimilation and gaseous nitrogen (N) loss through denitrification were the two major fates of nitrate entering or produced within most coastal ecosystems. Denitrification is often viewed as an important ecosystem service that removes reactive N from the ecosystem. However, there is a competing nitrate reduction process, dissimilatory nitrate reduction to ammonium (DNRA), that conserves N within the ecosystem. The recent application of nitrogen stable isotopes as tracers has generated growing evidence that DNRA is a major nitrogen pathway that cannot be ignored. Measurements comparing the importance of denitrification vs. DNRA in 55 coastal …

Go to article

Integrated Carbon Budget Models For The Everglades Terrestrial-Coastal-Oceanic Gradient: Current Status And Needs For Inter-Site Comparisons, Tiffany G. Troxler, Evelyn Gaiser, Jordan Barr, Jose D. Fuentes, Rudolf Jaffé, Daniel L. Childers, Ligia Colado-Vides, Victor H. Rivera-Monroy, Edward Castañeda-Moya, William Anderson, Randy Chambers, Meilian Chen, Carlos Coronado-Molina, Stephen E. Davis, Victor Engel, Carl Fitz, James Fourqurean, Tom Frankovich, John Kominoski, Chris Madden, Sparkle L. Malone, Steve F. Oberbauer, Paulo Olivas, Jennifer Richards, Colin Saunders, Jessica Schedlbauer, Leonard J. Scinto, Fred Sklar, Tom Smith, Joseph M. Smoak, Gregory Starr, Robert R. Twilley, Kevin Whelan Sep 2013

Integrated Carbon Budget Models For The Everglades Terrestrial-Coastal-Oceanic Gradient: Current Status And Needs For Inter-Site Comparisons, Tiffany G. Troxler, Evelyn Gaiser, Jordan Barr, Jose D. Fuentes, Rudolf Jaffé, Daniel L. Childers, Ligia Colado-Vides, Victor H. Rivera-Monroy, Edward Castañeda-Moya, William Anderson, Randy Chambers, Meilian Chen, Carlos Coronado-Molina, Stephen E. Davis, Victor Engel, Carl Fitz, James Fourqurean, Tom Frankovich, John Kominoski, Chris Madden, Sparkle L. Malone, Steve F. Oberbauer, Paulo Olivas, Jennifer Richards, Colin Saunders, Jessica Schedlbauer, Leonard J. Scinto, Fred Sklar, Tom Smith, Joseph M. Smoak, Gregory Starr, Robert R. Twilley, Kevin Whelan

Faculty Publications

Recent studies suggest that coastal ecosystems can bury significantly more C than tropical forests, indicating that continued coastal development and exposure to sea level rise and storms will have global biogeochemical consequences. The Florida Coastal Everglades Long Term Ecological Research (FCE LTER) site provides an excellent subtropical system for examining carbon (C) balance because of its exposure to historical changes in freshwater distribution and sea level rise and its history of significant long-term carbon-cycling studies. FCE LTER scientists used net ecosystem C balance and net ecosystem exchange data to estimate C budgets for riverine mangrove, freshwater marsh, and seagrass meadows, …

Go to article

Evaluation Of 54 Years Of Centralized Performance Bull Testing At The Dean Lee Research And Extension Center (Bulletin #893), Tabitha Howard, Matthew Garcia, Kenneth Bondioli, Sidney Derouen Sep 2013

Evaluation Of 54 Years Of Centralized Performance Bull Testing At The Dean Lee Research And Extension Center (Bulletin #893), Tabitha Howard, Matthew Garcia, Kenneth Bondioli, Sidney Derouen

LSU AgCenter Bulletins

The first objective of this study was to evaluate 54 years of performance data to analyze performance trends from a centralized performance bull testing program conducted in central Louisiana. The second objective was to discuss how changes in performance trends observed in the Dean Lee Performance Bull Tests compare to other multidecade bull performance tests.

Go to article

Action Threshold Treatment Regimens For Red Spider Mite (Acari: Tetranychidae) And Tomato Fruitworm (Lepidoptera: Noctuidae) On Tomato, Gadi V.P. Reddy, Khanobporn Tangtrakulwanich Sep 2013

Action Threshold Treatment Regimens For Red Spider Mite (Acari: Tetranychidae) And Tomato Fruitworm (Lepidoptera: Noctuidae) On Tomato, Gadi V.P. Reddy, Khanobporn Tangtrakulwanich

Faculty Publications

The tomato fruitworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is the foremost pest of tomato in the Mariana Islands. Similarly, the red spider mite, Tetranychus marianae McGregor (Acari: Tetranychidae), is a chief pest of vegetables particularly on tomato, Solanum lycopersicum L. (Solanaceae). However, the infestations by T. marianae are heavy during the early stages of crop growth, while infestations of H. armigera become prominent at later stages. Because no threshold levels are available for these pests, many growers apply up to 15 chemical applications per tomato cropping period. To reduce the regular spray schedules chemical applications and to prevent damage to …

Go to article

Susceptibility Of Field Populations Of The Fall Armyworm (Lepidoptera: Noctuidae) From Florida And Puerto Rico To Purified Cry1f Protein And Corn Leaf Tissue Containing Single And Pyramided Bt Genes, Ying Niu, Robert L. Meagher, Fei Yang, Fangneng Huang Sep 2013

Susceptibility Of Field Populations Of The Fall Armyworm (Lepidoptera: Noctuidae) From Florida And Puerto Rico To Purified Cry1f Protein And Corn Leaf Tissue Containing Single And Pyramided Bt Genes, Ying Niu, Robert L. Meagher, Fei Yang, Fangneng Huang

Faculty Publications

Larval survival of Cry1F-susceptible (FL),-resistant (PR and Cry1F-RR), and-heterozygous (FL x PR and Cry1F-RS) populations of the fall armyworm, Spodoptera frugiperda (J. E. Smith) to purified Cry1F protein and corn leaf tissue of 7 Bacillus thuringiensis (Bt) corn hybrids and 5 non-Bt corn hybrids was evaluated in the laboratory. The 7 Bt corn hybrids represent 5 Bt corn traits: Herculex®I, which expresses a single Bt protein (Cry1F), and Genuity® VT Double Pro™, VT Triple Pro™, SmartStax™, and Agrisure® Viptera ® 3111, which contain ≥ 2 pyramided Bt genes. The original FL and PR populations were collected from corn fields in …

Go to article

Susceptibility Of Louisiana And Florida Populations Of Spodoptera Frugiperda (Lepidoptera: Noctuidae) To Pyramided Bt Corn Containing Genuity®Vt Double Pro™ And Smartstax™ Traits, Fei Yang, Jawwad A. Qureshi, B. Rogers Leonard, Graham P. Head, Ying Niu, Fangneng Huang Sep 2013

Susceptibility Of Louisiana And Florida Populations Of Spodoptera Frugiperda (Lepidoptera: Noctuidae) To Pyramided Bt Corn Containing Genuity®Vt Double Pro™ And Smartstax™ Traits, Fei Yang, Jawwad A. Qureshi, B. Rogers Leonard, Graham P. Head, Ying Niu, Fangneng Huang

Faculty Publications

The fall armyworm, Spodoptera frugiperda (J. E. Smith), is a target species of transgenic corn containing pyramided Bt genes in the United States. During 2011, a total of 149 F2 two-parental family lines were established using single-pairing of S. frugiperda collected from 3 locations in Louisiana and Florida. This study examined the susceptibility of these F2 two-parental family lines to 2 commonly used pyramided Bt corn traits, Genuity®VT Double Pro™ and Genuity®SmartStax ™. Nine out of the 149 family lines showed less susceptibility to the leaf tissue of Genuity®VT Double Pro™ or Genuity®SmartStax plants. Larvae of these 9 family lines …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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.

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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.

Go to article

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, …

Go to article

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', …

Go to article

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%); …

Go to article

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 …

Go to article

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.

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

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 …

Go to article

First Prev Next Last