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2012

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Articles 17101 - 17130 of 22927

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Identification Of An Oxygenic Reaction Center Psbadc Operon In The Cyanobacterium Gloeobacter Violaceus Pcc 7421, Tuan A. Nguyen, Jasmina Brescic, David J. Vinyard, Thenappan Chandrasekar, G. Charles Dismukes Jan 2012

Identification Of An Oxygenic Reaction Center Psbadc Operon In The Cyanobacterium Gloeobacter Violaceus Pcc 7421, Tuan A. Nguyen, Jasmina Brescic, David J. Vinyard, Thenappan Chandrasekar, G. Charles Dismukes

Faculty Publications

Gloeobacter violaceus, the earliest diverging oxyphotobacterium (cyanobacterium) on the 16S ribosomal RNA tree, has five copies of the photosystem II psbA gene encoding the D1 reaction center protein subunit. These copies are widely distributed throughout the 4.6 Mbp genome with only one copy colocalizing with other PSII subunits, in marked contrast to all other psbA genes in all publicly available sequenced genomes. A clustering of two other psb genes around psbA3 (glr2322) is unique to Gloeobacter. We provide experimental proof for the transcription of a psbA3DC operon, encoding three of the five reaction center core subunits (D1, D2, and CP43). …

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Subordinate Male Cichlids Retain Reproductive Competence During Social Suppression, Jacqueline M. Kustan, Karen P. Maruska, Russell D. Fernald Jan 2012

Subordinate Male Cichlids Retain Reproductive Competence During Social Suppression, Jacqueline M. Kustan, Karen P. Maruska, Russell D. Fernald

Faculty Publications

Subordinate males, which are excluded from reproduction often save energy by reducing their investment in sperm production. However, if their position in a dominance hierarchy changes suddenly they should also rapidly attain fertilization capability. Here, we asked how social suppression and ascension to dominance influences sperm quality, spermatogenesis and reproductive competence in the cichlid Astatotilapia burtoni, where reproduction is tightly coupled to social status. Dominant territorial (T) males are reproductively active while subordinate non-territorial (NT) males are suppressed, but given the opportunity, NT males will perform dominance behaviours within minutes and attain T male testes size within days. Using the …

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The Phylogenetic Distribution And Ecological Role Of Carbon Monoxide Oxidation In The Genus Burkholderia, Carolyn F. Weber, Gary M. King Jan 2012

The Phylogenetic Distribution And Ecological Role Of Carbon Monoxide Oxidation In The Genus Burkholderia, Carolyn F. Weber, Gary M. King

Faculty Publications

Burkholderia is a physiologically and ecologically diverse genus that occurs commonly in assemblages of soil and rhizosphere bacteria. Although Burkholderia is known for its heterotrophic versatility, we demonstrate that 14 distinct environmental isolates oxidized carbon monoxide (CO) and possessed the gene encoding the catalytic subunit of form I CO dehydrogenase (coxL). DNA from a Burkholderia isolate obtained from a passalid beetle also contained coxL as do the genomic sequences of species H160 and Ch1-1. Isolates were able to consume CO at concentrations ranging from 100 ppm (vol/vol) to sub-ambient (< 60 ppb (vol/vol)). High concentrations of pyruvate inhibited CO uptake (> 2.5 mM), but mixotrophic consumption of CO and pyruvate occurred …

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Limited Potential For Adaptation To Climate Change In A Broadly Distributed Marine Crustacean, Morgan W. Kelly, Eric Sanford, Richard K. Grosberg Jan 2012

Limited Potential For Adaptation To Climate Change In A Broadly Distributed Marine Crustacean, Morgan W. Kelly, Eric Sanford, Richard K. Grosberg

Faculty Publications

The extent to which acclimation and genetic adaptation might buffer natural populations against climate change is largely unknown. Most models predicting biological responses to environmental change assume that species' climatic envelopes are homogeneous both in space and time. Although recent discussions have questioned this assumption, few empirical studies have characterized intraspecific patterns of genetic variation in traits directly related to environmental tolerance limits. We test the extent of such variation in the broadly distributed tidepool copepod Tigriopus californicus using laboratory rearing and selection experiments to quantify thermal tolerance and scope for adaptation in eight populations spanning more than 178 of …

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Recruitment And Biological Consequences Of Histone Modification Of H3k27me3 And H3k9me3., Joomyeong Kim, Hana Kim Jan 2012

Recruitment And Biological Consequences Of Histone Modification Of H3k27me3 And H3k9me3., Joomyeong Kim, Hana Kim

Faculty Publications

Two histone marks, H3K27me3 and H3K9me3, are well known for their repressive roles in the genic and nongenic regions of metazoan genomes. Several protein complexes are known to be responsible for generating these marks, including polycomb repression complex 2 and several H3K9 methylases. Recent studies have shown that the targeting of these histone-modifying complexes within mammalian genomes may be mediated through several DNA-binding proteins, including AEBP2, JARID2, and YY1. In this review, we discuss the potential targeting mechanisms in light of the recent results that have been derived from genome-wide chromatin immunoprecipitation sequencing data and the in vivo functions of …

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Components, Volume 8 (2012), Lsu Center For Computation And Technology Jan 2012

Components, Volume 8 (2012), Lsu Center For Computation And Technology

Components

No abstract provided.

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2012 Annual Report, Louisiana Rice Research Board, Lsu Agcenter Jan 2012

2012 Annual Report, Louisiana Rice Research Board, Lsu Agcenter

Louisiana Rice Research Board Annual Report

No abstract provided.

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Drop Deposition On Canopy And Chemical Control Of Phakopsora Pachyrhizi In Soybeans, Nédio R. Tormen, Felipe D.L. Da Silva, Mônica P. Debortoli, Juliano D. Uebel, Diego D. Fávera, Ricardo S. Balardin Jan 2012

Drop Deposition On Canopy And Chemical Control Of Phakopsora Pachyrhizi In Soybeans, Nédio R. Tormen, Felipe D.L. Da Silva, Mônica P. Debortoli, Juliano D. Uebel, Diego D. Fávera, Ricardo S. Balardin

Faculty Publications

Drop deposition on soybean canopy with three spray nozzles and chemical control programs of asian soybean rust were evaluated in two soybean cultivars, in a study carried out in Itaara, RS. The treatments were arranged under completely randomized block design with four replications, in a factorial design 2 × 3 × 3, utilizing two soybean cultivars, three spray nozzles and three chemical control programs. The fungicide applications were accomplished in R1 and R4 growth stages. Drop density, volumetric medium diameter (VMD), leaf area index (LAI), disease severity and grain yield were the variables measured. Based on the severity data of …

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Variants In Cxadr And F2rl1 Are Associated With Blood Pressure And Obesity In African-Americans In Regions Identified Through Admixture Mapping, Priya B. Shetty, Hua Tang, Bamidele O. Tayo, Alanna C. Morrison, Craig L. Hanis, Dabeeru C. Rao, Jeffery H. Young, Ervin R. Fox, Eric Boerwinkle, Richard S. Cooper, Neil J. Risch, Xiaofeng Zhu Jan 2012

Variants In Cxadr And F2rl1 Are Associated With Blood Pressure And Obesity In African-Americans In Regions Identified Through Admixture Mapping, Priya B. Shetty, Hua Tang, Bamidele O. Tayo, Alanna C. Morrison, Craig L. Hanis, Dabeeru C. Rao, Jeffery H. Young, Ervin R. Fox, Eric Boerwinkle, Richard S. Cooper, Neil J. Risch, Xiaofeng Zhu

Faculty Publications

OBJECTIVE: Genetic variants in 296 genes in regions identified through admixture mapping of hypertension, BMI, and lipids were assessed for association with hypertension, blood pressure (BP), BMI, and high-density lipoprotein cholesterol (HDL-C). METHODS: This study identified coding SNPs identified from HapMap2 data that were located in genes on chromosomes 5, 6, 8, and 21, wherein ancestry association evidence for hypertension, BMI, or HDL-C was identified in previous admixture mapping studies. Genotyping was performed in 1733 unrelated African-Americans from the National Heart, Lung and Blood Institute's Family Blood Pressure Project, and gene-based association analyses were conducted for hypertension, SBP, DBP, BMI, …

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Oyun: A New, Free Program For Iterated Prisoner’S Dilemma Tournaments In The Classroom, Charles H. Pence, Lara Buchak Jan 2012

Oyun: A New, Free Program For Iterated Prisoner’S Dilemma Tournaments In The Classroom, Charles H. Pence, Lara Buchak

Faculty Publications

Evolutionary applications of game theory present one of the most pedagogically accessible varieties of genuine, contemporary theoretical biology. We present here Oyun (oy-oon, http://charlespence.net/oyun), a program designed to run iterated prisoner's dilemma tournaments, competitions between prisoner's dilemma strategies developed by the students themselves. Using this software, students are able to readily design and tweak their own strategies, and to see how they fare both in round-robin tournaments and in “evolutionary” tournaments, where the scores in a given “generation” directly determine contribution to the population in the next generation. Oyun is freely available, runs on Windows, Mac, and Linux computers, …

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Gumbo Yearbook, Class Of 2012, Louisiana State University And Agricultural And Mechanical College Jan 2012

Gumbo Yearbook, Class Of 2012, 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.

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The Extrinsic Proteins Of Photosystem Ii, Terry M. Bricker, Johnna L. Roose, Robert D. Fagerlund, Laurie K. Frankel, Julian J. Eaton-Rye Jan 2012

The Extrinsic Proteins Of Photosystem Ii, Terry M. Bricker, Johnna L. Roose, Robert D. Fagerlund, Laurie K. Frankel, Julian J. Eaton-Rye

Faculty Publications

In this review we examine the structure and function of the extrinsic proteins of Photosystem II. These proteins include PsbO, present in all oxygenic organisms, the PsbP and PsbQ proteins, which are found in higher plants and eukaryotic algae, and the PsbU, PsbV, CyanoQ, and CyanoP proteins, which are found in the cyanobacteria. These proteins serve to optimize oxygen evolution at physiological calcium and chloride concentrations. They also shield the Mn 4CaO 5 cluster from exogenous reductants. Numerous biochemical, genetic and structural studies have been used to probe the structure and function of these proteins within the photosystem. We will …

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Research Matters Summer 2012, Louisiana State University And Agricultural & Mechanical College Jan 2012

Research Matters Summer 2012, Louisiana State University And Agricultural & Mechanical College

Research Matters & RNR Newsletters

Research Matters is a publication which highlights ongoing research, international travel experiences, classroom happenings and degree program developments of and for the School of Renewable Natural Resources' students and faculty.

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School Of Renewable Natural Resources Newsletter, Fall 2012, Louisiana State University And Agricultural & Mechanical College Jan 2012

School Of Renewable Natural Resources Newsletter, Fall 2012, 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.

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Female, French, And Alone The Case Of Luisa De Dufressi Before The Mexican Inquisition During The Time Of Viceroy Bernardo De Galvez (Hero Of The Battle Of Baton Rouge And Other Notable Feats), Frieda Koeninger Jan 2012

Female, French, And Alone The Case Of Luisa De Dufressi Before The Mexican Inquisition During The Time Of Viceroy Bernardo De Galvez (Hero Of The Battle Of Baton Rouge And Other Notable Feats), Frieda Koeninger

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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Pedro De Peralta And The Catholic Enlightenment Heaven To The Heavens And Back, Renee Gutierrez Jan 2012

Pedro De Peralta And The Catholic Enlightenment Heaven To The Heavens And Back, Renee Gutierrez

1650-1850: Ideas, Aesthetics, and Inquiries in the Early Modern Era

No abstract provided.

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Workshop And Panel Discussion: High-Throughput Cryopreservation Of Germplasm As An Exchange Currency For Genetic Resources, Zoltán M. Varga, Terrence R. Tiersch Jan 2012

Workshop And Panel Discussion: High-Throughput Cryopreservation Of Germplasm As An Exchange Currency For Genetic Resources, Zoltán M. Varga, Terrence R. Tiersch

Faculty Publications

No abstract provided.

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Offspring Production With Cryopreserved Sperm From A Live-Bearing Fish Xiphophorus Maculatus And Implications For Female Fecundity, Huiping Yang, Markita G. Savage, Leona Hazlewood, Ronald B. Walter, Terrence R. Tiersch Jan 2012

Offspring Production With Cryopreserved Sperm From A Live-Bearing Fish Xiphophorus Maculatus And Implications For Female Fecundity, Huiping Yang, Markita G. Savage, Leona Hazlewood, Ronald B. Walter, Terrence R. Tiersch

Faculty Publications

Xiphophorus fishes are well-established models for biomedical research of spontaneous or induced tumors, and their use in research dates back to the 1930s. Currently, 58 well-pedigreed lines exist among 24 Xiphophorus species housed as live animals at the Xiphophorus Genetic Stock Center. The technique of sperm cryopreservation has been applied to preserve these valuable genetic resources, and production of offspring has been reported with cryopreserved sperm in two species (X. helleri and X. couchianus). The goal of this research was to establish protocols for sperm cryopreservation and artificial insemination that yield live young in X. maculatus, a widely used research …

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Arbuscular Mycorrhizae Occur In Common Spartina Species, Angela K. Burcham, Joy H. Merino, Thomas C. Michot, John A. Nyman Jan 2012

Arbuscular Mycorrhizae Occur In Common Spartina Species, Angela K. Burcham, Joy H. Merino, Thomas C. Michot, John A. Nyman

Faculty Publications

We report the presence of arbuscular mycorrhizae (AM) in Spartina alterniflora Loisel roots. Roots were sampled for AM in field-collected and greenhouse-maintained Spartina patens (Aiton) Muhl. and S. alterniflora, the dominant species of Louisiana's brackish and saline marshes, respectively. Previous reports of AM association in these Spartina sp. are limited and conflicting. Field-collected 5. alterniflora had minimal AM (2.4%), whereas 39.5% of the 5. patens roots examined were AM colonized. Greenhouse conditions of reduced salinity [3 parts per thousand (ppt)] appeared to increase AM association for 5. patens compared with field samples. AM occurrence varied significantly among the three sample …

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Characterization Of Lateral Root Development At The Onset Of Storage Root Initiation In 'Beauregard' Sweetpotato Adventitious Roots, Arthur Villordon, Don Labonte, Julio Solis, Nurit Firon Jan 2012

Characterization Of Lateral Root Development At The Onset Of Storage Root Initiation In 'Beauregard' Sweetpotato Adventitious Roots, Arthur Villordon, Don Labonte, Julio Solis, Nurit Firon

Faculty Publications

This study characterized lateral root (LR) development attributes during the onset of storage root (SR) initiation stage in 'Beauregard' sweetpotato. SR initiation has been defined as the appearance of cambia around the protoxylem and secondary xylem elements. Our results showed that 20-day-old adventitious roots (ARs) classified as SRs had 53% and 85% greater mean LR count than pencil roots (PRs) and lignified roots (LGs), respectively. SRs had 53% and 78% greater mean LR density relative to PRs and LGs, respectively. SRs had 66% and 130% greater mean total LR length than PRs and LGs, respectively. SRs had lower mean main …

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Host Interferon-Γ Inducible Protein Contributes To Brucella Survival., Jennifer A. Ritchie, Adam Rupper, James A. Cardelli, Bryan H. Bellaire Jan 2012

Host Interferon-Γ Inducible Protein Contributes To Brucella Survival., Jennifer A. Ritchie, Adam Rupper, James A. Cardelli, Bryan H. Bellaire

Faculty Publications

Brucella spp. are highly adapted intracellular pathogens of mammals that cause chronic infections while surving and replicating in host monocytes and macrophages. Although monocytes are normally susceptible to infection, pretreatment with pro-inflammatory cytokine interferon-γ (IFN-γ) activates cellular defense mechanisms that increase intracellular killing of Brucella and prevents bacterial replication. We examined the contribution of the IFN-γ inducible GTPase, LRG-47, to B. abortus 2308 infection in in vitro and in vivo murine models. Infecting non-activated macrophages from LRG-47(-/-) mice revealed that loss of this host protein negatively effected the intracellular survival and replication of IgG opsonized B. abortus. In contrast, survival …

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Overexpression Of Arabidopsis And Rice Stress Genes' Inducible Transcription Factor Confers Drought And Salinity Tolerance To Rice, Karabi Datta, Niranjan Baisakh, Moumita Ganguly, Sellapan Krishnan, Kazuko Yamaguchi Shinozaki, Swapan K. Datta Jan 2012

Overexpression Of Arabidopsis And Rice Stress Genes' Inducible Transcription Factor Confers Drought And Salinity Tolerance To Rice, Karabi Datta, Niranjan Baisakh, Moumita Ganguly, Sellapan Krishnan, Kazuko Yamaguchi Shinozaki, Swapan K. Datta

Faculty Publications

Rice yield is greatly affected by environmental stresses such as drought and salinity. In response to the challenge of producing rice plants tolerant to these stresses, we introduced cDNA encoding the transcription factors DREB1A and DREB1B under the control of the stress inducible rd29 promoter. Two different indica rice cultivars were used, BR29, an improved commercially cultivated variety from Bangladesh and IR68899B, an IRRI bred maintainer line for hybrid rice. Agrobacterium mediated transformation of BR29 was done independently with DREB1A isolated from rice and Arabidopsis and DREB1B isolated from rice, whereas biolistic transformation was done with rice- DREB1B in the …

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The Origin And In Situ Identification Of Uncultured Gut Bacteria In Fourth-Instar Larvae Of The Red Imported Fire Ant, Solenopsis Invicta (Hymenoptera: Formicidae), Albert H. Lee, Linda Hooper-Bui Jan 2012

The Origin And In Situ Identification Of Uncultured Gut Bacteria In Fourth-Instar Larvae Of The Red Imported Fire Ant, Solenopsis Invicta (Hymenoptera: Formicidae), Albert H. Lee, Linda Hooper-Bui

Faculty Publications

This study corroborated the findings of Lee et al. (2008) and relied on culture-independent techniques, particularly 16SrDNA sequencing. Results from the study demonstrated that ants in captivity completely change their gut bacterial diversity strongly supports the conclusion that fire ant gut bacteria are environmental in origin. Bacteria in the fourth-instar larvae were present because they were consumed with food sources. From molecular data, a differing list of bacteria from each colony with different branching and clustering among bacterial clades in the phylogenetic trees were found. Different bacterial diversity and evenness was found in all colonies, which provided evidence against the …

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Responses To The Five Questions, Charles J. Dunlop Jr. Jan 2012

Responses To The Five Questions, Charles J. Dunlop Jr.

William Mitchell Law Review

No abstract provided.

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Responses To The Five Questions, Norman Abrams Jan 2012

Responses To The Five Questions, Norman Abrams

William Mitchell Law Review

No abstract provided.

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Antimicrobial Activity, Cytotoxicity And Phytochemical Analyses Of Rhus Aromatica, Rhus Glabra And Sanguinaria Canadensis Native To South Dakota, Gitanjali Nandakafle Jan 2012

Antimicrobial Activity, Cytotoxicity And Phytochemical Analyses Of Rhus Aromatica, Rhus Glabra And Sanguinaria Canadensis Native To South Dakota, Gitanjali Nandakafle

Electronic Theses and Dissertations

A total of twenty five South Dakota native medicinal plants were screened against enterotoxigenic Escherichia coli using a disk diffusion assay. Out of these 25 plants, three plants Rhus aromatica, Rhus glabra and Sanguinaria canadensis demonstrated the highest bacterial inhibition. The minimum inhibitory concentrations (MIC) of these plant extracts were determined using a bacterial enumeration assay. Alamar Blue in vitro cytotoxicity test showed that all extracts have some toxic effect to porcine intestinal epithelial cell lines. Phytochemical analysis of these plant extracts indicated the presence high concentration of flavonoids and condensed tannins in R. aromatica and that R. glabra contained …

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International Humanitarian Law Of Armed Conflict: A Critical Annotated Bibliography For Collection Development, Madeline Cohen Jan 2012

International Humanitarian Law Of Armed Conflict: A Critical Annotated Bibliography For Collection Development, Madeline Cohen

Publications and Research

This article is an annotated bibliography of selected monographs published from 2001 through 2012 in the fields of International Humanitarian Law of Armed Conflict (Laws of War) and International Human Rights Law. The aim is to provide a collection development guide for librarians and scholars in this area of international law. Key topics that are covered are: Internal conflicts, asymmetric warfare, laws of war, humanitarian intervention, treatment of insurgents, non-international armed conflict, targeted killings, terrorism, drones, robotics.

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Fisheries Report, Warmwater Streams And Rivers Region Iv 2011, Tennessee. Wildlife Resources Agency. Jan 2012

Fisheries Report, Warmwater Streams And Rivers Region Iv 2011, Tennessee. Wildlife Resources Agency.

Region IV Stream Reports

No abstract provided.

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Beyond Priapus: A Call For A Feminist And/Or Queer Theory Archaeology Of Roman Masculinity And Phallic Iconography, Ashley J. Barnett Jan 2012

Beyond Priapus: A Call For A Feminist And/Or Queer Theory Archaeology Of Roman Masculinity And Phallic Iconography, Ashley J. Barnett

Nebraska Anthropologist

Phallic iconography is ubiquitous throughout the archaeology of the Roman world and has raised questions about sexuality in ancient Rome. Dominant modern Western discourses privilege heterosexual male frameworks which many not adequately correspond to ancient Roman culture. Thus, the application of Feminist and/or Queer theory may expand academic insight into not only Roman sexuality, but also into the power and politics of the Republican Period.

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Justice In Context: Assessing Contextualism As An Approach To Justice, Michael Buckley Jan 2012

Justice In Context: Assessing Contextualism As An Approach To Justice, Michael Buckley

Publications and Research

Moral and political philosophers are increasingly using empirical data to inform their normative theories. This has sparked renewed interest into questions concerning the relationship between facts and principles. A recent attempt to frame these questions within a broader approach to normative theory comes from David Miller, who has on several occasions defended ‘contextualism’ as the best approach to justice. Miller argues that the context of distribution itself brings one or another political principle into play. This paper examines this claim. It considers several plausible strategies for carrying out Miller’s general project and argues that each strategy fails. Nevertheless, the author …

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