Digital Commons Network^™

Effects Of Imperfect Dynamic Clamp: Computational And Experimental Results., Bettencourt Jc, Lillis Kp, Stupin Lr, White Ja

Faculty Publications

No abstract provided.

Artificial Synaptic Conductances Reduce Subthreshold Oscillations And Periodic Firing In Stellate Cells Of The Entorhinal Cortex., Fernandez Fr, White Ja

Faculty Publications

No abstract provided.

Further Characterization Of Vibrio Vulnificus Rugose Variants And Identification Of A Capsular And Rugose Exopolysaccharide Gene Cluster, Brenda L. Grau, Margaret C. Henk, Katherine L. Garrison, Brett J. Olivier, Randall M. Schulz, Kathy L. O'Reilly, Gregg S. Pettis

Faculty Publications

Capsular polysaccharide (CPS) is a major virulence factor in Vibrio vulnificus, and encapsulated strains have an opaque, smooth (OpS) colony morphology, while nonencapsulated strains have a translucent, smooth (TrS) colony morphology. Previously, we showed that OpS and TrS parental strains can yield a third colony type, rugose (R), and that the resulting strains, with the OpR and TrR phenotypes, respectively, form copious biofilms. Here we show that while OpR and TrR strains both produce three-dimensional biofilm structures that are indicative of rugose extracellular polysaccharide (rEPS) production, OpR strains also retain expression of CPS and are virulent in an iron-supplemented mouse …

The Effect Of Diets Varying In Dietary Cation-Anion Difference Fed In Late Gestation And In Lactation On Sow Productivity, M. L. Roux, S. L. Johnston, R. D. Lirette, T. D. Bidner, L. L. Southern, P. W. Jardon

Faculty Publications

© 2008 American Registry of Professional Animal Scientists. Eighty-six primiparous or multiparoussows and their pigs were used to evaluatethe effects of changing DCAD in late gestation and in lactation on sow productivity.Sows were allotted to treatment based on parity and their farrowing date. Experiment 1 was a preliminary experiment conducted to determine the level of DCAD that would reduce urinary pH. Twenty sows were used in Exp. 1, and the dietary treatments consisted of a corn-soybean meal diet with 4 levels of DCAD (140, 103, 80, and 56 mEq/kg). These DCAD were achieved by addition of 4 levels of chloride …

First Report Of Multiple Drug Resistance In Trichostrongyles Affecting Sheep Under Field Conditions In Italy (Parasitology Research (2007) 101, 6, (1713-1716) Doi: 10.1007/S00436-007-0707-4), Donato Traversa, Barbara Paoletti, Domenico Otranto, James Miller

Faculty Publications

No abstract provided.

The Sinorhizobium Meliloti Msba2 Protein Is Essential For The Legume Symbiosis, Sebastian Beck, Victoria L. Marlow, Katy Woodall, William T. Doerrler, Euan K. James, Gail P. Ferguson

Faculty Publications

Sinorhizobium meliloti is a beneficial legume symbiont, closely related to Brucella species, which are chronic mammalian pathogens. We discovered that the S. meliloti MsbA2 protein is essential to ensure the symbiotic interaction with the host plant, alfalfa. S. meliloti invades plant cells via plant-derived structures known as infection threads. However, in the absence of MsbA2, S. meliloti remains trapped within abnormally thickened infection threads and induces a heightened plant defence response, characterized by a substantial thickening of the nodule endodermis layer and the accumulation of polyphenolic compounds. The S. meliloti MsbA2 protein is homologous to the Escherichia coli lipopolysaccharide/phospholipid trafficking …

Projecting Or Perceiving Values? The Blackburn-Mcdowell Debate, David Judd

Honors Capstones

No abstract provided.

Feasibility And Desirability Of Ethanol Production In The State Of Louisiana, John David Barreca

Honors Capstones

No abstract provided.

Hatchability Of End Of Lay Egg Production Broiler Breeder Eggs As Influenced By Prestorage Warming, Kyle Homan

Honors Capstones

No abstract provided.

Louisiana Agriculture Spring, 2008, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

The Effects Of Epidermal Growth Factor And Basic Fibroblast Growth Factor On Cryopreserved Human Adipose Derived Stem Cells In Culture: Proliferation, Adipogenesis, And Osteogenesis, Teddi Leigh Hebert

Honors Capstones

No abstract provided.

Responses Of The Sea Catfish, Ariopsis Felis, To Chemical Defenses From The Sea Hare, Aplysia Californica, Sheybani Arman

Honors Capstones

No abstract provided.

Neogene Evolution Of The Mixed Carbonate-Siliciclastic System In The Gulf Of Papua, Papua New Guinea, Evgueni N. Tcherepanov, André W. Droxler, Philippe Lapointe, Gerald R. Dickens, Sam J. Bentley, Luc Beaufort, Larry C. Peterson, James Daniell, Bradley N. Opdyke

Faculty Publications

This paper outlines the evolution of the late Cenozoic mixed carbonate-siliciclastic depositional system in the Gulf of Papua (GoP), using seismic, gravity, multibeam bathymetry, well data sets, and Landsat imagery. The deposition of the mixed sedimentary sequences was influenced by dynamic interplay of tectonics, eustasy, in situ carbonate production, and siliciclastic sediment supply. The roles of these major factors are estimated during different periods of the GoP margin evolution. The Cenozoic mixed system in the GoP formed in distinct phases. The first phase (Late Cretaceous-Paleocene) was mostly driven by tectonics. Rifting created grabens and uplifted structural blocks which served later …

Molecular Dynamics Simulations Of Biotin Carboxylase, Sten O.Nilsson Lili, Jiali Gao, Grover L. Waldrop

Faculty Publications

Biotin carboxylase catalyzes the ATP-dependent carboxylation of biotin and is one component of the multienzyme complex acetyl-CoA carboxylase that catalyzes the first committed step in fatty acid synthesis in all organisms. Biotin carboxylase from Escherichia coli, whose crystal structures with and without ATP bound have been determined, has served as a model system for this component of the acetyl-CoA carboxylase complex. The two crystal structures revealed a large conformational change of one domain relative to the other domains when ATP is bound. Unfortunately, the crystal structure with ATP bound was obtained with an inactive site-directed mutant of the enzyme. As …

The Innate Immune Database (Iidb), Martin Korb, G. R. Aistair, Vesteinn Thorsson, Christophe Battail, Bin Li, Daehee Hwang, Kathleen A. Kennedy, Jared C. Roach, Carrie M. Rosenberger, Mark Gilchrist, Daniel Zak, Carrie Johnson, Bruz Marzolf, Alan Aderem, Ilya Shmulevich, Hamid Bolouri

Faculty Publications

Background: As part of a National Institute of Allergy and Infectious Diseases funded collaborative project, we have performed over 150 microarray experiments measuring the response of C57/BL6 mouse bone marrow macrophages to toll-like receptor stimuli. These microarray expression profiles are available freely from our project web site http://www.innateImmunity-systemsbiology.org. Here, we report the development of a database of computationally predicted transcription factor binding sites and related genomic features for a set of over 2000 murine immune genes of interest. Our database, which includes microarray co-expression clusters and a host of web-based query, analysis and visualization facilities, is available freely via the …

Collpas: Activity Hotspots For Frugivorous Bats (Phyllostomidae) In The Peruvian Amazon, Adriana Bravo, Kyle E. Harms, Richard D. Stevens, Louise H. Emmons

Faculty Publications

In the SE Peruvian Amazon, large numbers of frugivorous bats regularly visit natural forest clearings known locally as collpas (which are also referred to as clay licks or mineral licks). Bats arrive at collpas to drink water that has accumulated in depressions created by larger geophagous mammals that consume exposed soil. Although collpa visitation is common, little is known about its causes and its ecological implications for the bat community. We compared patterns of use of collpas and non-collpa forest sites by bats in SE Peru. We mist netted bats at collpas and non-collpa sites during the dry season and …

Imprinting Of An Evolutionarily Conserved Antisense Transcript Gene Apeg3, Jung Ha Choo, Jeong Do Kim, Joomyeong Kim

Faculty Publications

APeg3 is an antisense transcript gene of Peg3, which has been recently identified from rat brain. Careful analyses of EST databases indicated that a homologous transcript also exists in other mammalian species, including mouse, cow and human. 5′-and 3′-RACE experiments have subsequently identified a 900-bp cDNA sequence of APeg3 from mouse brain. Mouse APeg3 is localized in the 3′UTR of Peg3 with an intronless genomic structure. The expression of mouse APeg3 is derived mainly from the paternal allele, indicating the imprinting of this antisense transcript gene in brain. Strand-specific RNA analyses also revealed the expression of both human and cow …

Origin Of The Eastern Brownsnake, Pseudonaja Textilis (Duméril, Bibron And Duméril) (Serpentes: Elapidae: Hydrophiinae) In New Guinea: Evidence Of Multiple Dispersals From Australia, And Comments On The Status Of Pseudonaja Textilis Pughi Hoser 2003, David J. Williams, Mark O'Shea, Roland L. Daguerre, Catharine E. Pook, Wolfgang Wüster, Christopher J. Hayden, John D. Mcvay, Owen Paiva, Teatu Lohi Matainaho, Kenneth D. Winkel, Christopher C. Austin

Faculty Publications

Pseudonaja textilis is a widespread and common snake in eastern parts of Australia, but its distribution in New Guinea is poorly understood, and the origin of the New Guinea populations and its timing have been the subject of much speculation. Phylogenetic analysis of mitochondrial DNA sequences from three New Guinea populations of P. textilis indicates that New Guinea was colonised from two independent eastern and western migration routes most likely in the Pleistocene. One dispersal event from northern Queensland led to the populations in eastern New Guinea (Milne Bay, Oro and Central Provinces, Papua New Guinea), whereas another, from Arnhem …

In Vivo Yy1 Knockdown Effects On Genomic Imprinting, Joomyeong Kim, Jeong Do Kim

Faculty Publications

The YY1 transcription factor is predicted to control several imprinted domains, including the Peg3, Gnas and Xist/Tsix regions. To test this possibility, we have used RNA interference strategies to generate transgenic mouse lines that express reduced levels of the cellular YY1 protein. As predicted, lowering YY1 levels resulted in global expression changes in these three imprinted domains. In neonatal brains, most imprinted genes of the Peg3 domain were up-regulated. In the Gnas domain, Nespas was down-regulated, whereas three other imprinted transcripts were up-regulated, including Nesp, Gnasxl and Exon1A. In the Xist/Tsix domain, no obvious change was detected in the expression …

Interactions Between Bacterial Carbon Monoxide And Hydrogen Consumption And Plant Development On Recent Volcanic Deposits, Gary M. King, Carolyn F. Weber

Faculty Publications

Patterns of microbial colonization and interactions between microbial processes and vascular plants on volcanic deposits have received little attention. Previous reports have shown that atmospheric CO and hydrogen contribute significantly to microbial metabolism on Kilauea volcano (Hawaii) deposits with varied ages and successional development. Relationships between CO oxidation and plant communities were not clear, however, since deposit age and vegetation status covaried. To determine plant-microbe interactions in deposits of uniform ages, CO and hydrogen dynamics have been assayed for unvegetated tephra on a 1959 deposit at Puu Puai (PP-bare), at the edge of tree islands within the PP deposit (PP-edge) …

Cellular Uptake And Lysosomal Delivery Of Galactocerebrosidase Tagged With The Hiv Tat Protein Transduction Domain, Xian Yang Zhang, Annie Dinh, James Cronin, Su Chen Li, Jakob Reiser

Faculty Publications

A number of studies have shown that a short peptide, the protein transduction domain (PTD) derived from the HIV-1 Tat protein (Tat-PTD) improved cellular uptake in vitro and distribution in vivo of recombinant proteins bearing such PTDs when administered systemically. To investigate the effects of Tat-PTD addition on the subcellular localization of the lysosomal enzyme galactocerebrosidase (GALC, EC 3.2.2.46) and with a view towards designing improved therapeutic strategies for Krabbe disease (globoid cell leukodystrophy), mouse GALC was tagged C-terminally with the Tat-PTD. Compared with unmodified GALC, GALC bearing a Tat-PTD, a myc epitope and 6 consecutive His residues [GALC-TMH (Tat-PTD, …

Gumbo Yearbook, Class Of 2008, Louisiana State University And Agricultural And Mechanical College

Gumbo Yearbook

The Gumbo yearbook chronicles the entire academic year at LSU. In words and especially photos, the Gumbo shows the people, places, and events that make each year unique. In addition to formal portraits of schools and departments, the book contains hundreds of snapshots of students with their friends and dozens of pages showcasing organizations.

Multiple Yy1 And Ctcf Binding Sites In Imprinting Control Regions, Joomyeong Kim

Faculty Publications

Known imprinting control regions (ICRs) contain unusual tandem arrays of DNA-binding sites for transcription factors, including YY1 for the Peg3, Gnas and Xist/Tsix domains and CTCF for the H19/Igf2 domain. These multiple DNA-binding sites are known to be the only functionally shared and evolutionarily selected feature among these ICRs. However, it is not well understood why the imprinting control regions tend to maintain a high density of a particular transcription factor-binding site. We hypothesize that the multiplicity associated with the YY1 and CTCF binding sites may be designed for attracting and maintaining the relatively high levels of YY1 and CTCF …

School Of Renewable Natural Resources Newsletter, Fall 2008, Louisiana State University And Agricultural & Mechanical College

Research Matters & RNR Newsletters

The annual newsletter from the School of Renewable Natural Resources was a publication which aimed to update and entertain interested readers with the news and research from RNR faculty, students and staff.

Louisiana Agriculture Winter, 2009, Lsu Agcenter

Louisiana Agriculture

No abstract provided.

2008 Louisiana Summary: Agriculture And Natural Resources, Lsu Agcenter

Louisiana Summary: Agriculture and Natural Resources

This publication tabulates the value of Louisiana agriculture in 2008. Agents and specialists of the Louisiana Cooperative Extension Service, as well as other agencies – both private and public – compiled the data. Their analysis focuses on the animal, forestry, fisheries, plant and wildlife commodities that comprise our vital agricultural industry. The agricultural industry continues to contribute significantly to the state’s economy with the potential for increased benefits through value-added processing.

The 2008 production year for the food and fiber sector of the state started with as much optimism as has been experienced in several years. Two years removed from …

Central And Peripheral Administration Of Kisspeptin Activates Gonadotropin But Not Somatotropin Secretion In Prepubertal Gilts, Clay A. Lents, Neely L. Heidorn, C. Richard Barb, J. Joe Ford

Faculty Publications

It is well established that kisspeptin signaling is necessary for the onset of puberty in laboratory animals. However, the role that kisspeptin may have in regulating puberty in large domestic animals is unknown. We tested the hypothesis that either central or peripheral infusion of kisspeptin would stimulate gonadotropin and GH secretion in prepubertal gilts. In experiment 1, prepubertal gilts were fitted with i.c.v. cannula and indwelling jugular catheters. Animals were randomly assigned to receive 0, 10, or 100 μg kisspeptin in saline. In experiment 2, prepubertal gilts, fitted with indwelling jugular catheters, randomly received 0, 1, 2.5, or 5 mg …

Components, Volume 4 (2008), Lsu Center For Computation & Technology

Components

No abstract provided.

Phonotaxis To Amphibian Vocalizations In Culex Territans (Diptera: Culicidae), Kristen Bartlett-Healy, Wayne Crans, Randy Gaugler

Faculty Publications

Culex territans Walker (Diptera: Culicidae) acquires bloodmeals from amphibian hosts. Females overwinter as inseminated adults and exit diapause in New Jersey when spring peepers (Pseudacris crucifer) are calling. We tested the hypothesis that Cx. territans uses amphibian vocalizations as a long-distance attractant. Two thirds of females oriented toward sound across all experiments. Females allowed to orient toward or away from a frog call, bird song, live frog, or control (a plugged in compact disc player) exhibited positive phonotaxis only to the frog call. Females exhibited positive phonotaxis to calls of P. crucifer, Hyla versicolor (northern gray tree frog), Bufo americanus …

The Termite Menace In New Orleans: Did They Cause The Floodwalls To Tumble?, Gregg Henderson

Faculty Publications

No abstract provided.