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2010

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Powerpack: Energy Profiling And Analysis Of High-Performance Systems And Applications, Rong Ge, Xizhou Feng, Shuaiwen Song, Hung-Ching Chang, Dong Li, Kirk W. Cameron Nov 2010

Powerpack: Energy Profiling And Analysis Of High-Performance Systems And Applications, Rong Ge, Xizhou Feng, Shuaiwen Song, Hung-Ching Chang, Dong Li, Kirk W. Cameron

Mathematics, Statistics and Computer Science Faculty Research and Publications

Energy efficiency is a major concern in modern high-performance computing system design. In the past few years, there has been mounting evidence that power usage limits system scale and computing density, and thus, ultimately system performance. However, despite the impact of power and energy on the computer systems community, few studies provide insight to where and how power is consumed on high-performance systems and applications. In previous work, we designed a framework called PowerPack that was the first tool to isolate the power consumption of devices including disks, memory, NICs, and processors in a high-performance cluster and correlate these measurements …

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Pp32 (Anp32a) Expression Inhibits Pancreatic Cancer Cell Growth And Induces Gemcitabine Resistance By Disrupting Hur Binding To Mrnas., Timothy K Williams, Christina L Costantino, Nikolai A Bildzukewicz, Nathan G Richards, David W Rittenhouse, Lisa Einstein, Joseph A Cozzitorto, Judith C Keen, Abhijit Dasgupta, Myriam Gorospe, Gregory E Gonye, Charles J Yeo, Agnieszka K Witkiewicz, Jonathan R Brody Nov 2010

Pp32 (Anp32a) Expression Inhibits Pancreatic Cancer Cell Growth And Induces Gemcitabine Resistance By Disrupting Hur Binding To Mrnas., Timothy K Williams, Christina L Costantino, Nikolai A Bildzukewicz, Nathan G Richards, David W Rittenhouse, Lisa Einstein, Joseph A Cozzitorto, Judith C Keen, Abhijit Dasgupta, Myriam Gorospe, Gregory E Gonye, Charles J Yeo, Agnieszka K Witkiewicz, Jonathan R Brody

Department of Surgery Faculty Papers

The expression of protein phosphatase 32 (PP32, ANP32A) is low in poorly differentiated pancreatic cancers and is linked to the levels of HuR (ELAV1), a predictive marker for gemcitabine response. In pancreatic cancer cells, exogenous overexpression of pp32 inhibited cell growth, supporting its long-recognized role as a tumor suppressor in pancreatic cancer. In chemotherapeutic sensitivity screening assays, cells overexpressing pp32 were selectively resistant to the nucleoside analogs gemcitabine and cytarabine (ARA-C), but were sensitized to 5-fluorouracil; conversely, silencing pp32 in pancreatic cancer cells enhanced gemcitabine sensitivity. The cytoplasmic levels of pp32 increased after cancer cells are treated with certain stressors, …

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Can Spr Be Used To Interrogate The Double Layer Of Nacl, Brandon Kawula Nov 2010

Can Spr Be Used To Interrogate The Double Layer Of Nacl, Brandon Kawula

Biomedical Engineering

Solutions of reagent grade salt .1, .01, .001, .0001, .00001M were run through a SPR to see if SPR had enough resolution to detect the formation of the electric double layer. We found that NaCl did in fact return a detectable signal. The signal shape seems to depend on concentration. While more study may need to be done to get definite information it looks like SPR can interrogate the double layer.

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An Analysis Of Supply Contracts In The Livestock Markets Of The United States, Doussou Traore Nov 2010

An Analysis Of Supply Contracts In The Livestock Markets Of The United States, Doussou Traore

Department of Agricultural Economics: Dissertations, Theses, and Student Research

In this report, we discuss market relations in the cattle and beef sector of the United States by setting up a sequence of optimization decisions taken by cattle feeders (producers, sellers) and meat packers (processors, buyers) to solve for the equilibrium supply and demand proportions in the contract market in a first stage given the respective degrees of risk aversion for the representative producer and processor. Subsequently we derive the impacts of contracts, namely impacts on the spot market price and the processors’ ability to exercise oligopsony power, in a second stage. Using a model for a fixed-price contract, the …

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Hearing Loss In Stranded Odontocete Dolphins And Whales, David Mann, Mandy Hill-Cook, Charles Manire, Danielle Greenhow, Eric Montie, Jessica Powell, Randall Wells, Gordon Bauer, Petra Cunningham-Smith, Robert Lingenfelser, Robert Digiovanni, Abigale Stone, Micah Brodsky, Robert Stevens, George Kieffer, Paul Hoetjes Nov 2010

Hearing Loss In Stranded Odontocete Dolphins And Whales, David Mann, Mandy Hill-Cook, Charles Manire, Danielle Greenhow, Eric Montie, Jessica Powell, Randall Wells, Gordon Bauer, Petra Cunningham-Smith, Robert Lingenfelser, Robert Digiovanni, Abigale Stone, Micah Brodsky, Robert Stevens, George Kieffer, Paul Hoetjes

Biology Faculty Publications and Presentations

The causes of dolphin and whale stranding can often be difficult to determine. Because toothed whales rely on echolocation for orientation and feeding, hearing deficits could lead to stranding. We report on the results of auditory evoked potential measurements from eight species of odontocete cetaceans that were found stranded or severely entangled in fishing gear during the period 2004 through 2009. Approximately 57% of the bottlenose dolphins and 36% of the rough-toothed dolphins had significant hearing deficits with a reduction in sensitivity equivalent to severe (70-90 dB) or profound (>90 dB) hearing loss in humans. The only stranded short-finned …

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The Cyclin E Regulator Cullin 3 Prevents Mouse Hepatic Progenitor Cells From Becoming Tumor-Initiating Cells, Uta Kossatz, Kai Breuhahn, Benita Wolf, Matthias Hardtke-Wolenski, Ludwig Wilkens, Doris Steinemann, Stephan Singer, Felicitas Brass, Stefan Kubicka, Brigitte Schlegelberger, Peter Schirmacher, Michael P. Manns, Jeffrey D. Singer, Nisar P. Malek Nov 2010

The Cyclin E Regulator Cullin 3 Prevents Mouse Hepatic Progenitor Cells From Becoming Tumor-Initiating Cells, Uta Kossatz, Kai Breuhahn, Benita Wolf, Matthias Hardtke-Wolenski, Ludwig Wilkens, Doris Steinemann, Stephan Singer, Felicitas Brass, Stefan Kubicka, Brigitte Schlegelberger, Peter Schirmacher, Michael P. Manns, Jeffrey D. Singer, Nisar P. Malek

Biology Faculty Publications and Presentations

Cyclin E is often overexpressed in cancer tissue, leading to genetic instability and aneuploidy. Cullin 3 (Cul3) is a component of the BTB-Cul3-Rbx1 (BCR) ubiquitin ligase that is involved in the turnover of cyclin E. Here we show that liver-specific ablation of Cul3 in mice results in the persistence and massive expansion of hepatic progenitor cells. Upon induction of differentiation, Cul3-deficient progenitor cells underwent substantial DNA damage in vivo and in vitro, thereby triggering the activation of a cellular senescence response that selectively blocked the expansion of the differentiated offspring. Positive selection of undifferentiated progenitor cells required the expression of …

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Parental Investment Decisions In Response To Ambient Nest-Predation Risk Versus Actual Predation On The Prior Nest, Anna D. Chalfoun, Thomas E. Martin Nov 2010

Parental Investment Decisions In Response To Ambient Nest-Predation Risk Versus Actual Predation On The Prior Nest, Anna D. Chalfoun, Thomas E. Martin

Wildlife Biology Faculty Publications

Theory predicts that parents should invest less in dependent offspring with lower reproductive value, such as those with a high risk of predation. Moreover, high predation risk can favor reduced parental activity when such activity attracts nest predators. Yet, the ability of parents to assess ambient nest-predation risk and respond adaptively remains unclear, especially where nest-predator assemblages are diverse and potentially difficult to assess. We tested whether variation in parental investment by a multi-brooded songbird (Brewer's Sparrow, Spizella breweri) in an environment (sagebrush steppe) with diverse predators was predicted by ambient nest-predation risk or direct experience with nest predation. Variation …

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Genetic Analysis Of Vancomycin-Resistant Gram-Positive Cocci Isolated From Wild Songbirds, Shingo Ishihara Nov 2010

Genetic Analysis Of Vancomycin-Resistant Gram-Positive Cocci Isolated From Wild Songbirds, Shingo Ishihara

Master's Theses or Doctor of Nursing Practice

The antibiotic vancomycin was developed by Eli Lilly in the 1950s in response to the growing number of Staphylococcus aureus infections that were resistant to penicillin. Vancomycin was not widely used at the time because of its high toxicity. However, use of vancomycin in the United States has increased dramatically since the 1980s because of the emergence of methicillin resistant Staphylococcus aureus (MRSA) and Enterococcus species. There are three known mechanisms for vancomycin resistance: 1) target site modification by van genes, 2) biofilm formation, and 3) bacterial cell wall thickening. Of these mechanisms, target site modification is the most common. …

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Milliamperage-Seconds, Kilovoltage And Patient Dose In Computed Radiography, Grace Stewart Nov 2010

Milliamperage-Seconds, Kilovoltage And Patient Dose In Computed Radiography, Grace Stewart

Master's Theses or Doctor of Nursing Practice

Radiographic techniques were applied to a human simulation pelvis phantom with evaluations of the resultant image analyzed by a designated radiologist. Results indicate that a lower patient dose is received when coupled with an increase in the tube voltage. Images analyzed demonstrated little noise variation between images, which indicates the ability to lower patient dose while maintaining quality images.

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Development Of An Enzyme-Linked Immunosorbent Assay (Elisa) For The Detection Of Pistachio Residues In Processed Foods, Pei Wen Lim Nov 2010

Development Of An Enzyme-Linked Immunosorbent Assay (Elisa) For The Detection Of Pistachio Residues In Processed Foods, Pei Wen Lim

Department of Food Science and Technology: Dissertations, Theses, and Student Research

Pistachios (Pistacia vera) are popular snacks and consumption of pistachios is notably increasing due to their usage as ingredients for confections, ice cream, and baked goods. The increased consumption of pistachios may lead to a higher frequency of allergic sensitization and an increased prevalence of allergic reactions to pistachios. Trace amounts of undeclared pistachio allergens can pose serious health risks for food-allergic consumers, including severe anaphylactic reactions. A highly sensitive analytical method, sandwich-type enzyme-linked immunosorbent assay (ELISA) is applied as a critical tool for food manufacturers and food scientists to detect minute amounts of allergenic food residues in …

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Removal Of Low Density Sediments By Vegetative Filters, Brent M. Hall Nov 2010

Removal Of Low Density Sediments By Vegetative Filters, Brent M. Hall

Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research

The use of vegetative filter strips (VFS) is a longstanding best management practice for the removal of sediment and other pollutants from overland flow. Many attempts have been made to model the effectiveness of a VFS based upon soil, vegetation, and sediment properties, and also upon flow conditions, but little work has been done to investigate the reliability of the existing models when considering sediments, such as microbial pathogens, that have a lower density than the mineral sediments used for development of the models. The objectives of this study were to: 1) quantify the ability of a VFS to remove …

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Multi-Scale Perspectives On Paddlefish Populations: Implications For Species Conservation And Management, Brenda M. Pracheil Nov 2010

Multi-Scale Perspectives On Paddlefish Populations: Implications For Species Conservation And Management, Brenda M. Pracheil

School of Natural Resources: Dissertations, Theses, and Student Research

The Order of fishes containing paddlefish and sturgeon has been named the most endangered group of organisms on the planet by the International Union of Conservation of Nature (IUCN). Population trajectories of paddlefish, whose native range is entirely encompassed within the United States of America, are currently unknown, although the IUCN has considered them to have a high extinction risk in the wild. The declaration of the vulnerability of paddlefish to extinction, coupled with the global plight of other sturgeon species create urgency to establish population and species-level population trajectories. Moreover, this declaration creates a great need for swift management …

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Wolbachia Isolation By Fractioned Centrifugation From Dirofilaria Immitis For Protein Analysis, V Sanprasert, S Sungpradit, S. Nuchprayoon Nov 2010

Wolbachia Isolation By Fractioned Centrifugation From Dirofilaria Immitis For Protein Analysis, V Sanprasert, S Sungpradit, S. Nuchprayoon

Chulalongkorn Medical Journal

Objective : The biological roles of Wolbachia, a filarial intracellular bacteria, have promoted applied researches in lymphatic filariasis. Analysis of Wolbachia proteins will provide complementary information on the biology of Wolbachia, as well as the immune mechanisms against filarial nematodes. We therefore developed a Wolbachia isolation method from Dirofilaria immitis (dog heartworm) for protein analysis. Methods : Wolbachia bacteria were homogenized and isolated by fractioned centrifugation by using 0.85% NaCl supplemented with varying concentration of Nonidet P-40 (NP-40) as the homogenization buffer. The purity of Wolbachia extracts were analyzed by sodium dodecyl sulfate polyacrylamide-gel electrophoresis (SDS-PAGE), and by quantitative polymerase …

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Wolbachia Of Arthropods And Filarial Nematodes: Biology And Applications, S Sungpradit, S. Nuchprayoon Nov 2010

Wolbachia Of Arthropods And Filarial Nematodes: Biology And Applications, S Sungpradit, S. Nuchprayoon

Chulalongkorn Medical Journal

Wolbachia is a group of obligatory intracellular gram-negative bacteria. This bacterium is responsible for manipulation of host reproduction in many arthropod species and involved in embryonic and larval development, adult female fertility, and survival in filarial nematode. The applied biology of Wolbachia and modification of pest and vector species using Wolbachia have been studied in order to suppress or modify natural populations. In addition, Wolbachia has been used as a novel chemotherapeutic target for filariasis control program. This article reviews the biology of Wolbachia in arthropods and filarial nematodes, including recent advance and future directions of using Wolbachia as a …

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Match- Mismatch Regulation For Bluegill And Yellow Perch Larvae And Their Prey In Sandhill Lakes, Jeffrey C. Jolley, David W. Willis, Richard S. Holland Nov 2010

Match- Mismatch Regulation For Bluegill And Yellow Perch Larvae And Their Prey In Sandhill Lakes, Jeffrey C. Jolley, David W. Willis, Richard S. Holland

Natural Resource Management Faculty Publications

Food availability may regulate fish recruitment, both directly and indirectly. The availability of zooplankton, especially to newly hatched larvae, is thought to be crucial to their early growth and survival. We examined stomach contents of larval bluegill Lepomis macrochirus and yellow perch Perca flavescens in Pelican Lake and Cameron Lake, Nebraska, in 2004 and 2005. We also determined zooplankton availability and calculated prey selection using Chesson’s a. In addition, we investigated potential match–mismatch regulation of recruitment from 2004 to 2008. Bluegill positively selected copepod nauplii and Bosmina spp., and yellow perch often selected copepods. Abundant zooplankton populations were available for …

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Buttresses As Microhabitats For Leaf-Litter Macroinvertebrates, November 2010, Samuel C. Somerville Nov 2010

Buttresses As Microhabitats For Leaf-Litter Macroinvertebrates, November 2010, Samuel C. Somerville

Monteverde Institute: Tropical Ecology and Conservation

The functional properties of buttresses are still debated, but hypotheses include they may be a response to mechanical strain and a method to increase the surface area of the tree base; the increased surface area may provide increased structural support and a larger area of surface soil which may give a competitive advantage for nutrient uptake. The effects of the latter “nutrient hypothesis” and whether it supports a rich community of leaf-litter fauna has not been well-studied. A more abundant and species rich macroinvertebrate community in buttresses could be indicative of a more nutrient rich microhabitat. In this study I …

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Effects Of Ecotourism On Mammal Diversity In The Monteverde Cloud Forest Preserve, November 2010, Sean Thomann Nov 2010

Effects Of Ecotourism On Mammal Diversity In The Monteverde Cloud Forest Preserve, November 2010, Sean Thomann

Monteverde Institute: Tropical Ecology and Conservation

Ecotourism is an increasingly popular way to promote and conserve biodiversity. Ecotourism provides a source of income, allowing reserves to promote education and afford protection. The downside to ecotourism is increased human activity, which can have negative impacts on local flora and fauna. I sampled mammal diversity at two sites in the Monteverde Cloud Forest Reserve; one site that is commonly visited by tourists, and one site that is never visited by tourists, using track plots and transects. Mammal abundance and densities were slightly higher on trails frequently used by tourists. However, using the Shannon-Weiner diversity index, I found a …

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Influence Of Microhabitat Conditions On The Abundance Of American Leaf Spot Disease (Mycena Citricolor) On Coffea Arabica, November 2010, Elizabeth Peterson Nov 2010

Influence Of Microhabitat Conditions On The Abundance Of American Leaf Spot Disease (Mycena Citricolor) On Coffea Arabica, November 2010, Elizabeth Peterson

Monteverde Institute: Tropical Ecology and Conservation

Coffea arabica (Rubiaceae) is extremely important to the agriculture, economy, and culture of Costa Rica. The primary production of coffee centers on the use of ‘shade-grown’ cultivation methods; even though this method yields high amounts of coffee, it also fosters conditions that are optimal for the growth of diseases, such as Mycena citricolor. This study aimed to determine which microhabitat conditions favor the growth of the disease. In addition to proximity to forest, the orientation of fungi spots, placement of the disease on the branches, and presence of an agricultural crop near the plant was recorded. It was determined that …

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The Effects Of Phosphorus, Copper, And Plant Age On Mycorrhizal Abundance In Orchid Roots, November 2010, Nathan Jespersen Nov 2010

The Effects Of Phosphorus, Copper, And Plant Age On Mycorrhizal Abundance In Orchid Roots, November 2010, Nathan Jespersen

Monteverde Institute: Tropical Ecology and Conservation

Mycorrhizae increase growth and nutrient acquisition in orchids. I study which factors affect mycorrhizal infestation. I organized three experiments: the first used wild orchids assumed to already be colonized by mycorrhizae and tested how receiving a nutrient solution that emphasized phosphorus affected mycorrhizae abundance. The second tested this same hypothesis with the exception that plants were initially devoid of mycorrhizae. It also tested how adept plants with and without mycorrhizae were at absorbing heavy metals such as copper and manganese from the soil to determine mycorrhizae’s remediation abilities. The third experiment focused on how age differences of plants affected mycorrhizae …

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Subcaste Composition In Responses To Alarm And Non-Alarm Pheromones On Foraging Trails Of Leaf-Cutter Ant Atta Cephalotes (Hymenoptera: Formicidae), November 2010, Michael Marquis Nov 2010

Subcaste Composition In Responses To Alarm And Non-Alarm Pheromones On Foraging Trails Of Leaf-Cutter Ant Atta Cephalotes (Hymenoptera: Formicidae), November 2010, Michael Marquis

Monteverde Institute: Tropical Ecology and Conservation

The response of the leaf-cutting ant Atta cephalotes to its alarm pheromones from crushed heads were compared to its response to crushed bodies without heads in order to examine the relative subcaste (minor and forager) composition of the responding individuals. The percentage of minor workers responding to the body parts near the foraging trail were recorded and compared with the experimentally determined percentage of minors in the trail traffic. The average percentage of minors in the ants responding to the two treatments (Heads: 44.9±0.72%, Bodies: 38.8±0.77%, N = 1300) both differed (p = .0007, p = .0113, df = 1) …

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Pit-Trap Construction Decisions By Wormlions (Diptera Vermileonidae) Effects Of Substrate Moisture And Larval Density, November 2010, James H. Muldoon Nov 2010

Pit-Trap Construction Decisions By Wormlions (Diptera Vermileonidae) Effects Of Substrate Moisture And Larval Density, November 2010, James H. Muldoon

Monteverde Institute: Tropical Ecology and Conservation

During their sessile larval stage, wormlions (Diptera vermileonidae) provide a unique insight into the importance of habitat selection because their local conditions greatly influence their growth and survivorship. Like their ecological relatives, antlions (Neuroptera myrmeleontidae), wormlion larvae are a sit-and-wait predators that construct conical pits to capture their prey. In this study, I demonstrate effects of moisture on larval pit-trap construction to explain the presence of and potential problems with wormlion aggregations. I found that larvae prefer drier soil conditions, for pit presence and size was negatively affected by large amounts of water. Results suggest larvae lack the strength to …

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Vesicular-Arbuscular Mycorrhizae (Vam) Spore Abundance And Soil Characteristics Along A Neotropical Premontane Forest Successional Gradient, November 2010, Kristin Schroder Nov 2010

Vesicular-Arbuscular Mycorrhizae (Vam) Spore Abundance And Soil Characteristics Along A Neotropical Premontane Forest Successional Gradient, November 2010, Kristin Schroder

Monteverde Institute: Tropical Ecology and Conservation

Tropical soils are generally nutrient poor, though they support high biodiversity and productivity. Most tropical plants are able to thrive in these soils because they form a symbiosis with Vesicular-Arbuscular Mycorrhizae (VAM). VAM increase the nutrient-absorption capabilities, and therefore the fitness, of the host plant. Previous studies suggest that as a pasture is allowed to regenerate, the soil should become less compact, more nutrient-rich, and the pH should become more neutral. These soil characteristics, in conjunction with spore number, may drive the rate and direction of some successional communities following disturbance. This study examines how VAM spore abundance, macronutrient levels …

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Air Pollution And Light Exposure: Lichen Species Richness, Abundance, And Diversity In San Luis, Costa Rica, November 2010, Sarah Strattan Nov 2010

Air Pollution And Light Exposure: Lichen Species Richness, Abundance, And Diversity In San Luis, Costa Rica, November 2010, Sarah Strattan

Monteverde Institute: Tropical Ecology and Conservation

Lichens are a unique and diverse group of organisms that can be bioindicators of atmospheric pollution. In this study, the effects of atmospheric pollution on lichen abundance, richness, and diversity were determined for lichens growing on rocks and fence posts in San Luis, Costa Rica. Lichens growing on rocks from a secondary forest were subjected to large amounts of ATV exhaust, and the effects of the exhaust on the lichens were observed over 22 days. Lichen species richness and abundance were quantified on fence posts along two sections of dirt road: one with high vehicle traffic and one low. Additionally, …

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Autonomous Robot Patrolling Of A Sparsely Populated Unknown Environment, Patrick Larocque Nov 2010

Autonomous Robot Patrolling Of A Sparsely Populated Unknown Environment, Patrick Larocque

Theses

The increasing availability and affordability of autonomous robots has expanded their uses for many new applications, such as exploration, surveillance and threat containment. Most research considers a team of a large number of robots that contain global information. This work explores distributed and low overhead algorithms for patrolling and threat containment within a region sparsely populated with few robots. The robots patrol the area without the global knowledge of the region, but each is equipped with an omni-directional range finder and a positioning system for keeping track of its location and metering distance and directions of events. This study presents …

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Actuarial Review Of The Tenncare Program, Development Of Fiscal Year 2011 Per Capita Costs, Tennessee. Division Of Tenncare. Nov 2010

Actuarial Review Of The Tenncare Program, Development Of Fiscal Year 2011 Per Capita Costs, Tennessee. Division Of Tenncare.

TennCare Actuarial Report

No abstract provided.

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Ambient Molecular Water Accumulation On Silica Surfaces Detected By A Reflectance Interference Optical Balance, X. F. Wang, M. Zhao, D. D. Nolte Nov 2010

Ambient Molecular Water Accumulation On Silica Surfaces Detected By A Reflectance Interference Optical Balance, X. F. Wang, M. Zhao, D. D. Nolte

Department of Physics and Astronomy Faculty Publications

Water is a persistent background in virtually all biosensors, yet is difficult to quantify. We apply an interferometric optical balance to measure water film accumulation from air onto several types of prepared silica surfaces. The optical balance uses in-line common-path interferometry with balanced quadratures to measure the real-time accumulation of molecular films. The accumulated water thickness is sensitive to ambient conditions, with thicknesses that vary from picometers up to nanometers, even on hydrophobic silanized surfaces. These results demonstrate that water adsorption contributes an excess signal in dry label-free protein microarray optical biosensors and presents a fundamental limit to assay sensitivity. …

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Changes In The Structure And Function Of Microbial Communities In Drinking Water Treatment Bioreactors Upon Addition Of Phosphorus, Xu Li, Giridhar Upadhyaya, Wangki Yuen, Jess Brown, Eberhard Morgenroth, Lutgarde Raskin Nov 2010

Changes In The Structure And Function Of Microbial Communities In Drinking Water Treatment Bioreactors Upon Addition Of Phosphorus, Xu Li, Giridhar Upadhyaya, Wangki Yuen, Jess Brown, Eberhard Morgenroth, Lutgarde Raskin

Department of Civil and Environmental Engineering: Faculty Publications

Phosphorus was added as a nutrient to bench-scale and pilot-scale biologically active carbon (BAC) reactors operated for perchlorate and nitrate removal from contaminated groundwater. The two bioreactors responded similarly to phosphorus addition in terms of microbial community function (i.e., reactor performance), while drastically different responses in microbial community structure were detected. Improvement in reactor performance with respect to perchlorate and nitrate removal started within a few days after phosphorus addition for both reactors. Microbial community structures were evaluated using molecular techniques targeting 16S rRNA genes. Clone library results showed that the relative abundance of perchlorate-reducing bacteria (PRB) Dechloromonas and Azospira …

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Effects Of Hurricane Katrina On Freshwater Fish Assemblages In A Small Coastal Tributary Of Lake Pontchartrain, Louisiana, Martin O'Connell Nov 2010

Effects Of Hurricane Katrina On Freshwater Fish Assemblages In A Small Coastal Tributary Of Lake Pontchartrain, Louisiana, Martin O'Connell

Earth and Environmental Sciences Faculty Publications

Hurricane Katrina struck southeastern Louisiana on 29 August 2005 and thereby created an opportunity to examine the effects of a catastrophic storm on fish assemblages in a coastal stream. Bayou Lacombe is a small (46.1 river kilometers), primarily freshwater stream that drains into the northeastern portion of Lake Pontchartrain, a large oligohaline estuary located north of New Orleans. In summer 2005 (prior to the hurricane), three upstream and three downstream reaches of Bayou Lacombe were surveyed by electrofishing. These same six reaches were resurveyed in the summer of 2006 to assess the effects of the hurricane on fish assemblages. There …

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And They Were There-Reports Of Meetings-2009 Charleston Conference, Ramune K. Kubilius Nov 2010

And They Were There-Reports Of Meetings-2009 Charleston Conference, Ramune K. Kubilius

Against the Grain

No abstract provided.

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Full Page Ads Nov 2010

Full Page Ads

Against the Grain

No abstract provided.

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