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A Hydrothermal After-Ripening Time Model For Seed Dormancy Loss In Bromus Tectorum L., Phil S. Allen, Necia B. Bair Mar 2006

A Hydrothermal After-Ripening Time Model For Seed Dormancy Loss In Bromus Tectorum L., Phil S. Allen, Necia B. Bair

Faculty Publications

After-ripening, the loss of dormancy under dry conditions, is associated with a decrease in mean base water potential for germination of Bromus tectorum L. seeds. After-ripening rate is a linear function of temperature above a base temperature, so that dormancy loss can be quantified using a thermal after-ripening time (TAR) model. To incorporate storage water potential into TAR, we created a hydrothermal after-ripening time (HTAR) model. Seeds from two B. tectorum populations were stored under controlled temperatures (20 or 30° C) and water potentials (400 to 40MPa). Subsamples were periodically removed from each storage treatment and incubated at 15 or …

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Zonal Patterns Of Delta C-13, Delta N-15 And Po-210 In The Tropical And Subtropical North Pacific, Min Chen, Laodong Guo, Qiang Ma, Yusheng Qiu, Run Zhang, E Lv, Yipu Huang Feb 2006

Zonal Patterns Of Delta C-13, Delta N-15 And Po-210 In The Tropical And Subtropical North Pacific, Min Chen, Laodong Guo, Qiang Ma, Yusheng Qiu, Run Zhang, E Lv, Yipu Huang

Faculty Publications

Nitrogen fixation process may supply a significant fraction of bioavailable nitrogen to surface waters, increase the oceanic sequestration of atmospheric CO2, and alter the distribution of geochemical parameters. We report a zonal pattern of delta N-15 and delta C-13 in particulate organic matter (POM), and ratios of particulate Po-210 to dissolved Po-210 along a transect through the subtropical and tropical North Pacific. Both N-15 and Po-210 signals indicated an enhanced N-2 fixation in the northwestern subtropical North Pacific. The eastward decrease of N-2 fixation along this transect testified the role of aeolian Fe and P in controlling marine N-2 fixation. …

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Coprophagy In A Cave-Adapted Salamander; The Importance Of Bat Guano Examined Through Nutritional And Stable Isotope Analyses, Danté B. Fenolio, G. O. Graening, Bret A. Collier, Jim F. Stout Feb 2006

Coprophagy In A Cave-Adapted Salamander; The Importance Of Bat Guano Examined Through Nutritional And Stable Isotope Analyses, Danté B. Fenolio, G. O. Graening, Bret A. Collier, Jim F. Stout

Faculty Publications

During a two year population ecology study in a cave environment, 15 Eurycea (=Typhlotriton) spelaea were observed ingesting bat guano. Furthermore, E. spelaea capture numbers increased significantly during the time that grey bats (Myotis grisescens) deposited fresh guano. We investigated the hypothesis that this behaviour was not incidental to the capture of invertebrate prey, but a diet switch to an energy-rich detritus in an oligotrophic environment. Stable isotope assays determined that guano may be assimilated into salamander muscle tissue, and nutritional analyses revealed that guano is a comparable food source to potential invertebrate prey items. This is the first report …

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Regulation Of Cytoplasmic Dynein Atpase By Lis1, Mariano T. Mesngon, Cataldo Tarricone, Sachin Hebbar, Aimee Guillotte, E. William Schmitt, Lorene Lanier, Andrea Musacchio, Stephen J. King, Deanna S. Smith Feb 2006

Regulation Of Cytoplasmic Dynein Atpase By Lis1, Mariano T. Mesngon, Cataldo Tarricone, Sachin Hebbar, Aimee Guillotte, E. William Schmitt, Lorene Lanier, Andrea Musacchio, Stephen J. King, Deanna S. Smith

Faculty Publications

Mutations in Lis1 cause classical lissencephaly, a developmental brain abnormality characterized by defects in neuronal positioning.Over the last decade, a clear link has been forged between Lis1 and the microtubule motor cytoplasmic dynein. Substantial evidenceindicates that Lis1 functions in a highly conserved pathway with dynein to regulate neuronal migration and other motile events. Yeasttwo-hybrid studies predict that Lis1 binds directly to dynein heavy chains (Sasaki et al., 2000; Tai et al., 2002), but the mechanistic significance of this interaction is not well understood. We now report that recombinant Lis1 binds to native brain dynein and significantly increases the microtubule-stimulated enzymatic …

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The Structure Of The Carboxyltransferase Component Of Acetyl-Coa Carboxylase Reveals A Zinc-Binding Motif Unique To The Bacterial Enzyme, Patrick Bilder, Sandra Lightle, Graeme Bainbridge, Jeffrey Ohren, Barry Finzel, Fang Sun, Susan Holley, Loola Al-Kassim, Cindy Spessard, Michael Melnick, Marcia Newcomer, Grover L. Waldrop Feb 2006

The Structure Of The Carboxyltransferase Component Of Acetyl-Coa Carboxylase Reveals A Zinc-Binding Motif Unique To The Bacterial Enzyme, Patrick Bilder, Sandra Lightle, Graeme Bainbridge, Jeffrey Ohren, Barry Finzel, Fang Sun, Susan Holley, Loola Al-Kassim, Cindy Spessard, Michael Melnick, Marcia Newcomer, Grover L. Waldrop

Faculty Publications

Acetyl-coA carboxylase (ACC) is a central metabolic enzyme that catalyzes the committed step in fatty acid biosynthesis: biotin-dependent conversion of acetyl-coA to malonyl-coA. The bacterial carboxyltransferase (CT) subunit of ACC is a target for the design of novel therapeutics that combat severe, hospital-acquired infections resistant to the established classes of frontline antimicrobials. Here, we present the structures of the bacterial CT subunits from two prevalent nosocomial pathogens, Staphylococcus aureus and Escherichia coli, at a resolution of 2.0 and 3.0 Å, respectively. Both structures reveal a small, independent zinc-binding domain that lacks a complement in the primary sequence or structure of …

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The Comet Assay To Determine The Mode Of Cell Death For The Ultrasonic Delivery Of Doxorubicin To Human Leukemia (Hl-60 Cells) From Pluronic P105 Micelles, Ghaleb A. Husseini, Kim L. O'Neill, William G. Pitt Feb 2006

The Comet Assay To Determine The Mode Of Cell Death For The Ultrasonic Delivery Of Doxorubicin To Human Leukemia (Hl-60 Cells) From Pluronic P105 Micelles, Ghaleb A. Husseini, Kim L. O'Neill, William G. Pitt

Faculty Publications

This notes examines the mode of cell death of HL-60 cells exposed to 70 kHz and 1.3 W/cm2 in the presence of 1% Pluronic P105 and 1.67 μg/ml doxorubicin (Dox). The cells were ultrasonicated for 30, 60 and 120 minutes. They were then lysed, electrophorised, stained using propidium iodide, and their DNA profile captured using a fluorescent microscope. The gradual DNA damage observed and the comet tails captured after 1 and 2 hours of insonation suggest that the mode of cell killing is apoptosis.

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Adaptive Evolution Of Chloroplast Genome Structure Inferred Using A Parametric Bootstrap Approach, Liying Cui, Jim Leebens-Mack, Li-San Wang, Jijun Tang, Linda Rymarquis, David B. Stern, Claude W. Depamphilis Feb 2006

Adaptive Evolution Of Chloroplast Genome Structure Inferred Using A Parametric Bootstrap Approach, Liying Cui, Jim Leebens-Mack, Li-San Wang, Jijun Tang, Linda Rymarquis, David B. Stern, Claude W. Depamphilis

Faculty Publications

Background
Genome rearrangements influence gene order and configuration of gene clusters in all genomes. Most land plant chloroplast DNAs (cpDNAs) share a highly conserved gene content and with notable exceptions, a largely co-linear gene order. Conserved gene orders may reflect a slow intrinsic rate of neutral chromosomal rearrangements, or selective constraint. It is unknown to what extent observed changes in gene order are random or adaptive. We investigate the influence of natural selection on gene order in association with increased rate of chromosomal rearrangement. We use a novel parametric bootstrap approach to test if directional selection is responsible for the …

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Evolution Of The Nanog Pseudogene Family In The Human And Chimpanzee Genomes, Daniel J. Fairbanks, Peter J. Maughan Feb 2006

Evolution Of The Nanog Pseudogene Family In The Human And Chimpanzee Genomes, Daniel J. Fairbanks, Peter J. Maughan

Faculty Publications

The NANOG gene is expressed in mammalian embryonic stem cells where it maintains cellular pluripotency. An unusually large family of pseudogenes arose from it with one unprocessed and ten processed pseudogenes in the human genome. This article compares the NANOG gene and its pseudogenes in the human and chimpanzee genomes and derives an evolutionary history of this pseudogene family. Results: The NANOG gene and all pseudogenes except NANOGP8 are present at their expected orthologous chromosomal positions in the chimpanzee genome when compared to the human genome, indicating that their origins predate the human-chimpanzee divergence. Analysis of flanking DNA sequences demonstrates …

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Crystal Structure Of The Hypoxia-Inducible Form Of 6-Phosphofructo-2- Kinase/Fructose-2,6-Bisphosphatase (Pfkfb3): A Possible New Target For Cancer Therapy, Song Gun Kim, Nathan P. Manes, M. Raafat El-Maghrabi, Yong Hwan Lee Feb 2006

Crystal Structure Of The Hypoxia-Inducible Form Of 6-Phosphofructo-2- Kinase/Fructose-2,6-Bisphosphatase (Pfkfb3): A Possible New Target For Cancer Therapy, Song Gun Kim, Nathan P. Manes, M. Raafat El-Maghrabi, Yong Hwan Lee

Faculty Publications

The hypoxia-inducible form of 6-phosphofructo-2-kinase/fructose-2,6- bisphosphatase (PFKFB3) plays a crucial role in the progression of cancerous cells by enabling their glycolytic pathways even under severe hypoxic conditions. To understand its structural architecture and to provide a molecular scaffold for the design of new cancer therapeutics, the crystal structure of the human form was determined. The structure at 2.1 Å resolution shows that the overall folding and functional dimerization are very similar to those of the liver (PFKFB1) and testis (PFKFB4) forms, as expected from sequence homology. However, in this structure, the N-terminal regulatory domain is revealed for the first time …

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Trehalose Uptake Through P2x7 Purinergic Channels Provides Dehydration Protection, Gloria D. Elliott, Xiang Hong Liu, Jennifer L. Cusick, Michael Menze, Jill Vincent, Trudy Witt, Steve Hand, Mehmet Toner Feb 2006

Trehalose Uptake Through P2x7 Purinergic Channels Provides Dehydration Protection, Gloria D. Elliott, Xiang Hong Liu, Jennifer L. Cusick, Michael Menze, Jill Vincent, Trudy Witt, Steve Hand, Mehmet Toner

Faculty Publications

The tetra-anionic form of ATP (ATP4-) is known to induce monovalent and divalent ion fluxes in cells that express purinergic P2X 7 receptors and with sustained application of ATP it has been shown that dyes as large as 831 Da can permeate the cell membrane. The current study explores the kinetics of loading α,α-trehalose (342 Da) into ATP stimulated J774.A1 cells, which are known to express the purinergic P2X 7 receptor. Cells that were incubated at 37°C in a 50 mM phosphate buffer (pH 7.0) containing 225 mM trehalose and 5 mM ATP, were shown to load trehalose linearly over …

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Nonrandom Processes Maintain Diversity In Tropical Forests, Christopher Wills, Kyle E. Harms, Richard Condit, David King, Jill Thompson, Fangliang He, Helene C. Muller-Landau, Peter Ashton, Elizabeth Losos, Liza Comita, Stephen Hubbell, James Lafrankie, Sarayudh Bunyavejchewin, H. S. Dattaraja, Stuart Davies, Shameema Esufali, Robin Foster, Nimal Gunatilleke, Savitri Gunatilleke, Pamela Hall, Akira Itoh, Robert John, Somboon Kiratiprayoon, Suzanne Loo De Lao, Marie Massa, Cheryl Nath, Md Nur Supardi Noor, Abdul Rahman Kassim, Raman Sukumar, Hebbalalu Satyanarayana Suresh, I. Fang Sun, Sylvester Tan, Takuo Yamakura Jan 2006

Nonrandom Processes Maintain Diversity In Tropical Forests, Christopher Wills, Kyle E. Harms, Richard Condit, David King, Jill Thompson, Fangliang He, Helene C. Muller-Landau, Peter Ashton, Elizabeth Losos, Liza Comita, Stephen Hubbell, James Lafrankie, Sarayudh Bunyavejchewin, H. S. Dattaraja, Stuart Davies, Shameema Esufali, Robin Foster, Nimal Gunatilleke, Savitri Gunatilleke, Pamela Hall, Akira Itoh, Robert John, Somboon Kiratiprayoon, Suzanne Loo De Lao, Marie Massa, Cheryl Nath, Md Nur Supardi Noor, Abdul Rahman Kassim, Raman Sukumar, Hebbalalu Satyanarayana Suresh, I. Fang Sun, Sylvester Tan, Takuo Yamakura

Faculty Publications

An ecological community's species diversity tends to erode through time as a result of stochastic extinction, competitive exclusion, and unstable host-enemy dynamics. This erosion of diversity can be prevented over the short term if recruits are highly diverse as a result of preferential recruitment of rare species or, alternatively, if rare species survive preferentially, which increases diversity as the ages of the individuals increase. Here, we present census data from seven New and Old World tropical forest dynamics plots that all show the latter pattern. Within local areas, the trees that survived were as a group more diverse than those …

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The Prp19 U-Box Crystal Structure Suggests A Common Dimeric Architecture For A Class Of Oligomeric E3 Ubiquitin Ligases, Craig W. Vander Kooi, Melanie D. Ohi, Joshua A. Rosenberg, Michael L. Oldham, Marcia E. Newcomer, Kathleen L. Gould, Walter J. Chazin Jan 2006

The Prp19 U-Box Crystal Structure Suggests A Common Dimeric Architecture For A Class Of Oligomeric E3 Ubiquitin Ligases, Craig W. Vander Kooi, Melanie D. Ohi, Joshua A. Rosenberg, Michael L. Oldham, Marcia E. Newcomer, Kathleen L. Gould, Walter J. Chazin

Faculty Publications

Prp19 is an essential splicing factor and a member of the U-box family of E3 ubiquitin ligases. Prp19 forms a tetramer via a central coiled-coil domain. Here, we show the U-box domain of Prp19 exists as a dimer within the context of the Prp19 tetramer. A high-resolution structure of the homodimeric state of the Prp19 U-box was determined by X-ray crystallography. Mutation of the U-box dimer interface abrogates U-box dimer formation and is lethal in vivo. The structure of the U-box dimer enables construction of a complete model of Prp19 providing insights into how the tetrameric protein functions as an …

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Control Of High-Order Harmonic Emission Using Attosecond Pulse Trains, J. Biegert, A. Heinrich, C. P. Hauri, W. Kornelis, P. Schlup, M. P. Anscombe, M. B. Gaarde, K. J. Schafer, U. Keller Jan 2006

Control Of High-Order Harmonic Emission Using Attosecond Pulse Trains, J. Biegert, A. Heinrich, C. P. Hauri, W. Kornelis, P. Schlup, M. P. Anscombe, M. B. Gaarde, K. J. Schafer, U. Keller

Faculty Publications

We show that attosecond pulse trains are a natural tool to control strong field processes such as high-order harmonic generation. Coherently combining an attosecond pulse train with an IR driving field, we predict and experimentally confirm enhancement and spectral narrowing of the harmonic yield at photon energies around 90 eV. The use of an attosecond pulse train to seed the harmonic generation process replaces tunneling ionization with a single-photon ionization step, therefore permitting the manipulation of the time–frequency properties of high-order harmonic generation already at the single-atom level. © 2006 Taylor & Francis Group, LLC.

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Satellite Ocean Color Assessment Of Air-Sea Fluxes Of Co2 In A River-Dominated Coastal Margin, Steven E. Lohrenz, Wei-Jun Cai Jan 2006

Satellite Ocean Color Assessment Of Air-Sea Fluxes Of Co2 In A River-Dominated Coastal Margin, Steven E. Lohrenz, Wei-Jun Cai

Faculty Publications

Quantification of the contributions of river-influenced margins to regional CO2 fluxes is difficult due to the high degree of spatial and temporal variability in these regions. We describe an algorithm for assessment of surface water partial pressure of CO2 (pCO(2)) from MODIS imagery in the northern Gulf of Mexico. Principal component analysis and multiple regression were used to relate surface pCO(2) to environmental variables (T, S, chlorophyll). Subsequent retrieval of corresponding products from MODIS-Aqua L1B data permitted the assessment of regional distributions of pCO(2). An area of low pCO(2) was evident in the vicinity of the Mississippi River delta, consistent …

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Whole Genome Computational Comparative Genomics: A Fruitful Approach For Ascertaining Alu Insertion Polymorphisms, Jianxin Wang, Lei Song, M. Katherine Gonder, Sami Azrak, David A. Ray, Mark A. Batzer, Sarah A. Tishkoff, Ping Liang Jan 2006

Whole Genome Computational Comparative Genomics: A Fruitful Approach For Ascertaining Alu Insertion Polymorphisms, Jianxin Wang, Lei Song, M. Katherine Gonder, Sami Azrak, David A. Ray, Mark A. Batzer, Sarah A. Tishkoff, Ping Liang

Faculty Publications

Alu elements are the most active and predominant type of short interspersed elements (SINEs) in the human genome. Recently inserted polymorphic (for presence/absence) Alu elements contribute to genome diversity among different human populations, and they are useful genetic markers for population genetic studies. The objective of this study is to identify polymorphic Alu insertions through an in silico comparative genomics approach and to analyze their distribution pattern throughout the human genome. By computationally comparing the public and Celera sequence assemblies of the human genome, we identified a total of 800 polymorphic Alu elements. We used polymerase chain reaction-based assays to …

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Religious Interpretations Of Death, Afterlife & Ndes, David San Filippo Ph.D. Jan 2006

Religious Interpretations Of Death, Afterlife & Ndes, David San Filippo Ph.D.

Faculty Publications

This E-book reviews religious beliefs concerning death, afterlife, and near-death experiences. The discussion will provide commentary regarding the similarities between different religious beliefs and experiences concerning death, as well as between religious interpretations of near-death experiences.

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Philosophical, Psychological & Spiritual Perspectives On Death & Dying, David San Filippo Ph.D. Jan 2006

Philosophical, Psychological & Spiritual Perspectives On Death & Dying, David San Filippo Ph.D.

Faculty Publications

This Ebook reviews the philosophical perspectives on death, the psychological perspectives on death and the fears of death and some religious perspectives of death. The philosophic section will review perspectives of death from ancient Greece through modernity. The psychological section will review death, and the fear of death, from the perspectives of psychoanalytic, humanistic, and existentialist theories. The religious section will provide a brief overview of Prehistoric, African, Buddhist, Hindu, Islamic, Jewish, and Christian religious beliefs concerning death and afterlife.

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Impacts Of A Manure Composting Program On Stream Water Quality, A. Bekele, A. M.S. Mcfarland, A. J. Whisenant Jan 2006

Impacts Of A Manure Composting Program On Stream Water Quality, A. Bekele, A. M.S. Mcfarland, A. J. Whisenant

Faculty Publications

In February 2001, the Texas Commission on Environmental Quality (TCEQ) adopted a Total Maximum Daily Load (TMDL) for soluble reactive phosphorus (SRP) along the North Bosque River. Within this TMDL, dairy waste application fields were identified as the major nonpoint-source contribution of nutrients. In September 2000, a manure composting program was initiated that resulted in about 500,000 metric tons of dairy manure being hauled to composting facilities and exported from the watershed through December 2004. To evaluate the impact of the manure composting program on stream water quality, storm event mean concentrations of nutrients and total suspended solids were compared …

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Geospatial Analysis Of Southern Pine Biome And Pollen Distribution Patterns In Southeastern, I-Kuai Hung Jan 2006

Geospatial Analysis Of Southern Pine Biome And Pollen Distribution Patterns In Southeastern, I-Kuai Hung

Faculty Publications

The spatial relationship between the parent plants and the distribution of their pollen rain is extremely important for the survival and health of natural ecosystems. In our modern societies there is a continuous and extensive need for wood products, therefore, the health and productivity of the forest ecosystems should be primary concerns for practitioners and researchers. Southern yellow pine forested biomes consist of four major pine species that have been extremely important as American timber sources and as income for the lumber industry. Currently, the intensive harvesting and exploitation of southern pine forests have created a series of highly fragmented …

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‘Flex Your Power’: Energy Crises And The Shifting Rhetoric Of The Grid, Anne Marie Todd, A. Wood Jan 2006

‘Flex Your Power’: Energy Crises And The Shifting Rhetoric Of The Grid, Anne Marie Todd, A. Wood

Faculty Publications

In response to widespread power outages, rolling blackouts, and ubiquitous energy debates, this essay considers our relation to energy and the grid that produces it. First, we investigate California's multimedia Flex Your Power campaign, which defines consumers as nodes of the grid to emphasize their responsibility to maintain a stable energy supply. Second, we examine state and national responses to the 2003 blackout in the Northeastern United States, attending to three strategies through which grid administrators sought to impose order, enact hierarchy, and deindividuate power. We propose that the grid invokes personalization at the "local" level and abstraction at the …

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"I Am The Truth": An Understanding Of Truth From Christology For Scripture, Alan G. Padgett Jan 2006

"I Am The Truth": An Understanding Of Truth From Christology For Scripture, Alan G. Padgett

Faculty Publications

No abstract provided.

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A New Moustache Wasp In Dominican Amber, With An Account Of Apoid Wasp Evolution Emphasizing Crabroninae (Hymenoptera: Crabronidae), Daniel J. Bennett, Michael S. Engel Jan 2006

A New Moustache Wasp In Dominican Amber, With An Account Of Apoid Wasp Evolution Emphasizing Crabroninae (Hymenoptera: Crabronidae), Daniel J. Bennett, Michael S. Engel

Faculty Publications

A new, extinct species of the wasp genus Lindenius (Crabroninae: Crabronini: Crabronina) is described and figured from two exquisitely preserved specimens discovered in Early Miocene Dominican amber. Lindenius paleomystax, new species, represents the first record for the tribe Crabronini in Dominican amber and the southernmost record for the genus in the New World. The unique locality and habitat data begin to reveal a more complicated natural history for the genus than that suggested by Recent taxa alone. A checklist of fossil apoid wasps in amber is provided and the new species is discussed within the context of an overview …

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Nest-Site Selection In The Eastern Box Turtle, Terrapene Carolina Carolina, In Illinois [Abstract], Beth A. Flitz, Stephen J. Mullin Jan 2006

Nest-Site Selection In The Eastern Box Turtle, Terrapene Carolina Carolina, In Illinois [Abstract], Beth A. Flitz, Stephen J. Mullin

Faculty Publications

No abstract provided.

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Heparin Modulates The 99-Loop Of Factor Ixa: Effects On Reactivity With Isolated Kunitz-Type Inhibitor Domains, Pierre F. Neuenschwander, Stephen R. Williamson, Armen Nalian, Kimberly J. Baker-Deadmond Jan 2006

Heparin Modulates The 99-Loop Of Factor Ixa: Effects On Reactivity With Isolated Kunitz-Type Inhibitor Domains, Pierre F. Neuenschwander, Stephen R. Williamson, Armen Nalian, Kimberly J. Baker-Deadmond

Faculty Publications

Reactivity of factor IXa with basic pancreatic trypsin inhibitor is enhanced by low molecular weight heparin (enoxaparin). Previous studies by us have suggested that this effect involves allosteric modulation of factor IXa. We examined the reactivity of factor IXa with several isolated Kunitz-type inhibitor domains: basic pancreatic trypsin inhibitor, the Kunitz inhibitor domain of protease Nexin-2, and the first two inhibitor domains of tissue factor pathway inhibitor. We find that enhancement of factor IXa reactivity by enoxaparin is greatest for basic pancreatic trypsin inhibitor (>10-fold), followed by the second tissue factor pathway inhibitor domain (1.7-fold) and the Kunitz inhibitor …

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Food For Early Succession Birds: Relationships Among Arthropods, Shrub Vegetation, And Soil, Richard N. Conner, Daniel Saenz, Brent Burt Jan 2006

Food For Early Succession Birds: Relationships Among Arthropods, Shrub Vegetation, And Soil, Richard N. Conner, Daniel Saenz, Brent Burt

Faculty Publications

During spring and early summer, shrub- and herbaceous-level vegetation provides nesting and foraging habitat for many shrub-habitat birds. We examined relationships among arthropod biomass and abundance, foliage leaf surface area and weight, vegetation ground cover, soil characteristics, relative humidity, and temperature to evaluate what factors may influence arthropod food resources for birds. Relative humidity was inversely associated with arthropod biomass; as humidity increased biomass decreased (r = -0.44, P = 0.004). We failed to detect any relationships between deciduous foliage (surface area and weight) and arthropod biomass or abundance. However, both arthropod abundance (r = 0.30, P = 0.06) and …

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Relationships Among Arthropods, Herbaceous-Shrub Layer Vegetation, And Soil In An Early Succession Pine Stand., Brent Burt, Richard N. Conner, Saenz Daniel Jan 2006

Relationships Among Arthropods, Herbaceous-Shrub Layer Vegetation, And Soil In An Early Succession Pine Stand., Brent Burt, Richard N. Conner, Saenz Daniel

Faculty Publications

During spring and early summer, shrub- and herbaceous-level vegetation provides nesting and foraging habitat for many shrub-habitat birds. We examine relationships among arthropod biomass and abundance, foliage leaf surface area and weight, vegetation ground cover, soil characteristics, relative humidity, and temperature to evaluate what factors may influence arthropod food resources for birds.

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Structure And Vibrational Spectra Of Mononitrated Benzo [A] Pyrenes., Kefa Karimu Onchoke, Christopher M. Hadad, Prabir K. Dutta Jan 2006

Structure And Vibrational Spectra Of Mononitrated Benzo [A] Pyrenes., Kefa Karimu Onchoke, Christopher M. Hadad, Prabir K. Dutta

Faculty Publications

The molecules benzo[a]pyrene (BaP) and 1-, 3-, and 6-nitrobenzo[a]pyrene (1-NBaP, 3-NBaP, 6-NBaP) are currently of significant interest due to their presence in respirable combustion exhaust particulates and their mutagenic and carcinogenic properties. Structure−function correlations as well as spectroscopic signatures for trace analysis are necessary for these benzo[a]pyrene derivatives. In this paper, detailed infrared and Raman spectroscopic data of BaP and its three mononitrated isomers are provided for the first time. By utilizing density functional theory (DFT, B3LYP method with 6-311+G** basis set), the molecular geometries and the vibrational spectra are calculated. Good agreement is …

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The Rotavirus Enterotoxin Nsp4 Directly Interacts With The Caveolar Structural Protein Caveolin-1, Rebecca D. Parr, Stephen M. Storey, Deanne M. Mitchell, Avery Mcintosh, Minglong Zhou, Kiran D. Mir, Judith M. Ball Jan 2006

The Rotavirus Enterotoxin Nsp4 Directly Interacts With The Caveolar Structural Protein Caveolin-1, Rebecca D. Parr, Stephen M. Storey, Deanne M. Mitchell, Avery Mcintosh, Minglong Zhou, Kiran D. Mir, Judith M. Ball

Faculty Publications

Rotavirus nonstructural protein 4 (NSP4) is known to function as an intracellular receptor at the endoplasmic reticulum (ER) critical to viral morphogenesis and is the first characterized viral enterotoxin. Exogenously added NSP4 induces diarrhea in rodent pups and stimulates secretory chloride currents across intestinal segments as measured in Ussing chambers. Circular dichroism studies further reveal that intact NSP4 and the enterotoxic peptide (NSP4114-135) that is located within the extended, C-terminal amphipathic helix preferentially interact with caveola-like model membranes. We now show colocalization of NSP4 and caveolin-1 in NSP4-transfected and rotavirus-infected mammalian cells in reticular structures surrounding the nucleus …

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Asking The Straight Question: How To Come To Speech In Spite Of Conceptual Liquidation As A Homosexual, Jose M. Gabilondo Jan 2006

Asking The Straight Question: How To Come To Speech In Spite Of Conceptual Liquidation As A Homosexual, Jose M. Gabilondo

Faculty Publications

No abstract provided.

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Estimating Hydrodynamic Quantities In The Presence Of Microscopic Fluctuations, Alejandro Garcia Jan 2006

Estimating Hydrodynamic Quantities In The Presence Of Microscopic Fluctuations, Alejandro Garcia

Faculty Publications

This paper discusses the evaluation of hydrodynamic variables in the presence of spontaneous fluctuations, such as in molecular simulations of fluid flows. The principal point is that hydrodynamic variables such as fluid velocity and temperature must be defined in terms of mechanical variables such as momentum and energy density). Because these relations are nonlinear and because fluctuations of mechanical variables are correlated, care must be taken to avoid introducing a bias when evaluating means, variances, and correlations of hydrodynamic variables. The unbiased estimates are formulated; some alternative, incorrect approaches are presented as cautionary warnings. The expressions are verified by numerical …

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