Digital Commons Network^™

Kinetic Characterization Of Salmonella Flik-Flhb Interactions Demonstrates Complexity Of The Type Iii Secretion Substrate-Specificity Switch, Daniel P. Morris, Eric D. Roush, J. Will Thompson, M. Arthur Moseley, James W. Murphy, Jonathan L. Mcmurry

Faculty Articles

The bacterial flagellum is a complex macromolecular machine consisting of more than 20000 proteins, most of which must be exported from the cell via a dedicated Type III secretion apparatus. At a defined point in flagellar morphogenesis, hook completion is sensed and the apparatus switches substrate specificity type from rod and hook proteins to filament ones. How the switch works is a subject of intense interest. FIiK and F1hBs play central roles. In the present study, two optical biosensing methods were used to characterize FIiK-F1hB interactions using wild-type and two variant FlhBs from mutants with severe flagellar structural defects. Binding …

Medical School Watercooler Newsletter - August 29, 2010, Lindsey Lyle

Watercooler Newsletter

This is the August 29, 2010 edition of the Frederick P. Whiddon College of Medicine's newsletter - Watercooler.

Contents Include:

• USA Football Program "Sneak Peek"
• Clyde Huggins Recipients Announced at 2010 Medical Student Research Day
• Harry Potter Exhibit Begins Next Week at USA Biomedical Library
• USA Women in Science Organization Hosts GEMS --Girls Exploring Math and Science
• Med School Café - Expert Advice For The Community
• USA Knollwood Physicians Group Welcomes Dr. Christi Cazalas

Impacts Of Climate Change On Stygofauna In Southwest Western Australia., Stefan Eberhard

KIP Abstracts

Southwest Western Australia has experienced an unparalleled climate shift since the mid 1970's, characterised by reduced rainfall which has contributed to declining groundwater levels. Climate modelling attributes part of this change to atmospheric greenhouse gases, and predicts the drying trend will increase over coming decades. Groundwater pools and streams in limestone caves at Yanchep and the Leeuwin- Naturaliste region are habitat for assemblages of stygofauna associated with tree roots which grow in the cave pools and streams. Because of the declining water levels, these Aquatic Root Mat Communities were listed as Threatened Ecological Communities (TECs) (status Endangered) under the Federal …

Troglofauna In The Pilbara Region, Western Australia Troglofauna In The Pilbara Region, Western Australia – Patterns In Diversity And Distribution, And Sampling Considerations For Conservation, Peter Bell, Stefan Eberhard, G. Perina

KIP Abstracts

"Discovery of diverse terrestrial invertebrate assemblages in subterranean habitats associated with iron-ore bearing rocks in the Pilbara region has driven a spate of troglofauna surveys as part of pre-mining environmental impact assessment. We present the results from recent surveys undertaken by mining companies which contribute new understanding towards this remarkable hidden element of biodiversity in Western Australia's arid regions. Patterns in the systematic composition, species richness and abundance of troglofauna assemblages collected from mining exploration drill holes are described. The systematic composition of the assemblages includes arachnids (Araneae, Pseudoscorpionida, Schizomida, Palpigrada), insects (Diplura, Thysanura, Coleoptera, Hemiptera, Blattodea), myriapods (Diplopoda, Chilopoda, …

Global Learning And The Engaging Questions Of Globalization, Daniel Paracka

Journal of Global Initiatives: Policy, Pedagogy, Perspective

While universities can act as important mediators amidst the highly disruptive and contentious change processes of globalization, very few institutions are intentionally fulfilling such a mission. Moreover, there are significant ethnocentric and ideological barriers to overcome before intercultural understanding and cooperation may occur. Nonetheless, universities in the global age are increasingly called upon to help prepare students to better perceive, understand, interpret, translate, and negotiate complex interdependent global contexts. This article examines the significance of several common reactions to the challenges of globalization for teaching and learning in higher education. It also outlines primary areas of focus for global educators …

Plan B For America, Amelia Wing

Fresh Voices: Composition at Cal Poly

In her persuasive essay, “Plan B for America,” Amelia Wing offers a carefully researched, formal argument. Notice how the essay’s thesis is revealed gradually, in three steps. What rhetorical purpose does this technique serve? Is it effective? Wing’s discussion offers explicit connections to the essay’s thesis in every body paragraph—without restating the thesis. Her argument is primarily logos based in the body: the essay’s approach to the topic is clinical and objective. She leaves herself out of the discussion by not developing her ethos and maintains an impersonal tone throughout. What sort of audience would respond positively to this approach? …

The Tiger Vol. 104 Issue 13 2010-08-27, Clemson University

Tiger Newspapers

No abstract provided.

2010 Ursinus College Academic Convocation Program, Ursinus College

Academic Convocation Programs

This Ursinus College Academic Convocation program lists speakers and events for the opening of the 2010 academic year.

Frataxin And Mitochondrial Fes Cluster Biogenesis, Timothy L. Stemmler, Emmanuel Lesuisse, Debumar Pain, Andrew Dancis

Biochemistry and Molecular Biology Faculty Publications

Friedreich’s ataxia is an inherited neurodegenerative disease caused by frataxin deficiency. Frataxin is a conserved mitochondrial protein that plays a role in Fe-S cluster assembly in mitochondria. Fe-S clusters are modular cofactors that perform essential functions throughout the cell. They are synthesized by a multi-step and multi-subunit mitochondrial machinery that includes a scaffold protein Isu for assembling a protein bound Fe-S cluster intermediate. Frataxin interacts with Isu, iron, and with the cysteine desulfurase Nfs1 that supplies sulfur, thus placing it at the center of mitochondrial Fe-S cluster biosynthesis.

Stony Brook Press, V. 31, N. 16, Stony Brook University. Stony Brook Press.

Stony Brook Press

v. 31, n. 16, v.:ill. ; 38 cm (original analog pub.)

The Bg News August 27, 2010, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. August 27, 2010. Volume 101-Issue 6.

Today - August 27, 2010, Loma Linda University

TODAY

Inside this issue:

-- $2.1 million NIH grant will enable pharmacy professor to study HIV/AIDS prevention
-- Loma Linda University Medical Center sweeps its categories at Pacific Southwest Emmy Awards
-- The future of parking at LLU
-- Researchers at Loma Linda University School of Medicine and George Mason University find promising biomarker source in early detection of Alzheimer's
-- BMC administrator speaks out on the stigma of mental illness
-- LLU Medical Center boasts largest hyperbaric oxygen chamber on West Coast
-- Phil-Anne Krogman leaves the door open as she says farewell to FMO
-- Loma Linda University operators …

Predicting The Distribution Of Air Pollution Sensitive Lichens Using Habitat Niche Modeling, Gajendra Shrestha

Theses and Dissertations

Usnea hirta and Xanthoparmelia cumberlandia are commonly used as bio-monitors of air quality. In order to more accurately and efficiently determine the distribution of these two sensitive indicator species, we have developed a probabilistic distribution map as a function of 9 macroclimatic and topographic variables for the White River National Forest, Colorado using Non-Parametric Multiplicative Regression (NPMR) analysis. Furthermore, we also developed a logistic regression (LR) model for X. cumberlandia in order to evaluate the strengths and limitations of the NPMR model. The best model for U. hirta included four variables - solar radiation, average monthly precipitation, average monthly minimum …

The Gulf Of Mexico Red Snapper Individual Fishing Quota Program: The Effects On The Fishing Industry And Potential Outlook, Nathan Miller

USF Tampa Graduate Theses and Dissertations

In January 2007, the Gulf of Mexico red snapper fishery took a step toward sustainability and began management under an individual fishing quota (IFQ) system. The hope is that direct ownership stakes by fishers brings more direct involvement on behalf of the boat owners and fishermen as well as more responsible and sustainable fishing practices on depressed fish populations. The research was conducted in order to study the welfare of local fishing communities as well as the effects on the red snapper fishery itself. Traditional fisheries and economic data were analyzed. In addition a Data Envelopment Analysis (DEA) of the …

August 27, 2010, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Connect - April 2009

Connect

Click the DOWNLOAD button to access this issue of Connect.

Plasticity Of Brain Networks In A Randomized Intervention Trial Of Exercise Training In Older Adults, Michelle W. Voss, Ruchika S. Prakash, Kirk I. Erickson, Chandramallika Basak, Laura Chaddock, Jennifer S. Kim, Heloisa Alves, Susie Heo, Amanda N. Szabo, Siobhan M. White, Thomas R. Wójcicki, Emily L. Mailey, Neha Gothe, Erin A. Olson, Edward Mcauley, Arthur F. Kramer

Kinesiology, Health and Sport Studies

Research has shown the human brain is organized into separable functional networks during rest and varied states of cognition, and that aging is associated with specific network dysfunctions. The present study used functional magnetic resonance imaging (fMRI) to examine low-frequency (0.008 < f < 0.08 Hz) coherence of cognitively relevant and sensory brain networks in older adults who participated in a 1-year intervention trial, comparing the effects of aerobic and nonaerobic fitness training on brain function and cognition. Results showed that aerobic training improved the aging brain’s resting functional efficiency in higher-level cognitive networks. One year of walking increased functional connectivity between aspects of the frontal, posterior, and temporal cortices within the Default Mode Network and a Frontal Executive Network, two brain networks central to brain dysfunction in aging. Length of training was also an important factor. Effects in favor of the walking group were observed only after 12 months of training, compared to non-significant trends after 6 months. A non-aerobic stretching and toning group also showed increased functional connectivity in the DMN after 6 months and in a Frontal Parietal Network after 12 months, possibly reflecting experience-dependent plasticity. Finally, we found that changes in functional connectivity were behaviorally relevant. Increased functional connectivity was associated with greater improvement in executive function. Therefore the study provides the first evidence for exercise-induced functional plasticity in large-scale brain systems in the aging brain, using functional connectivity techniques, and offers new insight into the role of aerobic fitness in attenuating age-related brain dysfunction.

Are Unfamiliar Neighbours Considered To Be Dear-Enemies?, Elodie Briefer, Fanny Rybak, Thierry Aubin

Sentience Collection

Background: Discriminating threatening individuals from non-threatening ones allow territory owners to modulate their territorial responses according to the threat posed by each intruder. This ability reduces costs associated with territorial defence. Reduced aggression towards familiar adjacent neighbours, termed the dear-enemy effect, has been shown in numerous species. An important question that has never been investigated is whether territory owners perceive distant neighbours established in the same group as strangers because of their unfamiliarity, or as dear-enemies because of their group membership.

Methodology/Principal Findings: To investigate this question, we played back to male skylarks (Alauda arvensis) songs of adjacent neighbours, distant …

Ecological Thresholds In Marine Communities: Theory, Experiments And Management. In Threshold Dynamics In Marine Coastal Systems (Theme Section), Richard W. Osman, Pablo Munguia, Roman Zajac

Biology and Environmental Science Faculty Publications

There is increasing interest in the resilience of marine and estuarine populations, communities and ecosystems, and their rapid change when stresses reach some threshold or tipping point. Current research on thresholds is altering our understanding of these systems, the processes by which they change, and our approach to their management and restoration. In this Theme Section conceptual, modeling, and empirical studies explore threshold dynamics in marine coastal systems in a variety of habitats and across different scales. The contributions provide a window on present research, highlight some of the issues being debated, and point to some of the potential applications …

Daily Eastern News: August 26, 2010, Eastern Illinois University

August

No abstract provided.

The Advocate, August 26, 2010, Minnesota State University Moorhead

The Advocate

No abstract provided.

The Alestle - Vol. 63 No. 2 - 08/26/2010, Southern Illinois University Edwardsville

The Alestle

Vol. 63 No. 2

Mother-Of-Pearls: The Entwined History Of Shell And Pearl In Arkansas, Lenore Shoults

Student Theses and Dissertations

This dissertation explores the culture and commerce surrounding Arkansas's freshwater mussel. Slightly more than a century ago it generated excitement for its pearls. The next fifty years or so transformed tons of shell into millions of button blanks bound for northern and eastern finishing plants. During the last half of the twentieth century, beads made from the shell inoculated oysters for the cultured pearl industry. Regionally, the mollusk's usage extends back to early Native Americans who made tools from the shell and used the pearls for adornment or burial practices. Medieval and Renaissance Europeans desired pearls as a display of …

Genetic Diversity And Distribution Of Selected Freshwater Mollusks (Gastropoda And Bivalvia) From West Of The Mississippi River With An Emphasis On Arkansas Taxa, David Michael Hayes

Student Theses and Dissertations

Freshwater mollusks represent one of the most imperiled groups in North America. Basic information reguarding distribution, species limits, and evolutionary relationships is lacking. In an effort to fill in data gaps reguarding diversity and distribution of freshwater mollusks, particularly west of the Mississippi River, I identified two main objectives. The first objective was to examine two taxonomically challenging groups (Pleuroceridae:Gastropoda and Unionidae:Pleurobemini) using molecular phylogenetics. The goal of this work was to provide a molecular hypothesis to aid in sorting out phenotypic plasticity and cryptic diversity. The second objective was to conduct a survey of freshwater gastropods from the Interior …

Electrochemical Patterning Of Organic Monolayers On Silicon, Sri Sai S. Vegunta, Johnpeter N. Ngunjiri, John C. Flake

Faculty Publications

Organic monolayers may be grafted onto silicon surfaces using an in situ electrochemical patterning method. In this technique, dielectric templates such as polystyrene spheres (ε=2.5) or poly(dimethylsiloxane) stamps (ε=2.3-2.8) are placed in close proximity to, or in direct contact with, silicon electrodes while a potential is applied to drive electrografting reactions. In this work, the authors describe methyl monolayer patterns created in anodic processes and phenylacetylene monolayer patterns created in cathodic processes. Both anodic and cathodic processes show similar chronoamperometric behavior, suggesting silicon passivation associated with the formation of monolayers. Atomic force microscopy shows the sizes, geometries, and thickness of …

Involvement Of Tip60 Acetyltransferase In Intracellular Salmonella Replication., Xueqin Wang, Dongju Li, Di Qu, Daoguo Zhou

Department of Biological Sciences Faculty Publications

Background

Salmonella enterica is a facultative intracellular pathogen that replicates within a membrane-bound compartment termed Salmonella containing vacuole (SCV). The biogenesis of SCV requiresSalmonella type III protein secretion/translocation system and their effector proteins which are translocated into host cells to exploit the vesicle trafficking pathways. SseF is one of these effectors required for SCV formation and Intracellular Salmonella replication through unknown mechanisms.

Results

In an attempt to identify host proteins that interact with SseF, we conduct a yeast two-hybrid screening of human cell cDNA library using SseF as the bait. We identified that TIP60, an acetyltransferase, interacts with SseF. …

Central Florida Future, Vol. 42 No. 51, August 26, 2010

Central Florida Future

Improved library now open; Uncover Thursdays; Home Grown; Plus: The Safety Ride; A treasure of a tavern; UCF offers a speech therapy; Doctorate student featured on reality show; "Dr. G": Chief medical examiner.

The Roads Are Bumpy Ones: A Study Of Body Image Through Abstract Performance, Alexis Goldstein

Theses and Dissertations

An overwhelming number of contemporary adolescents struggle with difficult issues. Many of these problems are socially related whereas others can be directly related to the degradation of the family unit. Among the most damaging of issues is distorted body image, which infect youth, often causing them to communicate aggressively, and even landing them in compromising situations. I have sought to challenge my students to redefine themselves through expressive movement and the creation of abstract rhythmic sounds. In teaching these techniques, I have given my former students the means to combat negative thoughts and actions, as well as an excellent tool …

Differential Expression Of N-Methyl-D-Aspartate Receptors Of Cynprinidae, Taito Eguchi

Honors Capstone Projects and Theses

No abstract provided.

Volume 48, Number 1: August 25, 2010, University Of North Dakota

University Letter Archive

No abstract provided.