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Assessment Of Contemporary Arctic River Runoff Based On Observational Discharge Records, Richard B. Lammers, Alexander I. Shiklomanov, Charles J. Vorosmarty, Balazs M. Fekete, Bruce J. Peterson Feb 2001

Assessment Of Contemporary Arctic River Runoff Based On Observational Discharge Records, Richard B. Lammers, Alexander I. Shiklomanov, Charles J. Vorosmarty, Balazs M. Fekete, Bruce J. Peterson

Faculty Publications

We describe the contemporary hydrography of the pan‐Arctic land area draining into the Arctic Ocean, northern Bering Sea, and Hudson Bay on the basis of observational records of river discharge and computed runoff. The Regional Arctic Hydrographic Network data set, R‐ArcticNET, is presented, which is based on 3754 recording stations drawn from Russian, Canadian, European, and U.S. archives. R‐ArcticNET represents the single largest data compendium of observed discharge in the Arctic. Approximately 73% of the nonglaciated area of the pan‐Arctic is monitored by at least one river discharge gage giving a mean gage density of 168 gages per 106 km2. …

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Variations In Bacterial Community Structure During A Dinoflagellate Bloom Analyzed By Dgge And 16s Rdna Sequencing, Laura B. Fandino, Lasse Riemann, Grieg F. Steward, Richard A. Long, Farooq Azam Jan 2001

Variations In Bacterial Community Structure During A Dinoflagellate Bloom Analyzed By Dgge And 16s Rdna Sequencing, Laura B. Fandino, Lasse Riemann, Grieg F. Steward, Richard A. Long, Farooq Azam

Faculty Publications

The relationship between bacterial 16S rRNA gene composition and carbon metabolism was analyzed during an intense dinoflagellate bloom off the Southern California coast during the spring of 1997. Bacterial numbers and rate processes, chlorophyll a, and the dissolved and particulate organic matter pools were measured during the bloom to provide a framework within which to assess bacterial community composition. Free bacteria were numerically dominant, generally comprising >90% of the total, and were responsible for >70% of bacterial production. Attached bacteria had higher cell-specific growth rates than free bacteria (range = 0.5 to 15.1 and 0.7 to 2.5 d-1 …

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Hyaluronan Synthase Elevation In Metastatic Prostate Carcinoma Cells Correlates With Hyaluronan Surface Retention, A Prerequisite For Rapid Adhesion To Bone Marrow Endothelial Cells, Melanie A. Simpson, Jane Reiland, Scott R. Burger, Leo T. Furcht, Andrew P. Spicer, Theodore R. Oegema, James B. Mccarthy Jan 2001

Hyaluronan Synthase Elevation In Metastatic Prostate Carcinoma Cells Correlates With Hyaluronan Surface Retention, A Prerequisite For Rapid Adhesion To Bone Marrow Endothelial Cells, Melanie A. Simpson, Jane Reiland, Scott R. Burger, Leo T. Furcht, Andrew P. Spicer, Theodore R. Oegema, James B. Mccarthy

Faculty Publications

Bone marrow is the primary site of metastasis in patients with advanced stage prostate cancer. Prostate carcinoma cells metastasizing to bone must initially adhere to endothelial cells in the bone marrow sinusoids. In this report, we have modeled that interaction in vitro using two bone marrow endothelial cell (BMEC) lines and four prostate adenocarcinoma cell lines to investigate the adhesion mechanism. Highly metastatic PC3 and PC3M-LN4 cells were found to adhere rapidly and specifically (70-90%) to BMEC-1 and trHBMEC bone marrow endothelial cells, but not to human umbilical vein endothelial cells (15-25%). Specific adhesion to BMEC-1 and trHBMEC was dependent …

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Process For Immobilizing Waste Using Bagasse (Us Patent 6174275), Michael A. Janusa Jan 2001

Process For Immobilizing Waste Using Bagasse (Us Patent 6174275), Michael A. Janusa

Faculty Publications

No abstract provided.

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Between Gay And Straight-1 Before, Lisa M. Tillmann Ph.D. Jan 2001

Between Gay And Straight-1 Before, Lisa M. Tillmann Ph.D.

Faculty Publications

In chapter 1, “Before,” of the book Between Gay and Straight: Understanding Friendship Across Sexual Orientation (AltaMira Press, 2001), I story the absences, silences, and stereotypes surrounding same-sex orientation when I came of age in the 1980s and early 90s.

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Pycnothyrium Ultrastructure In Tubakia Dryina [Abstract], Josephine Taylor Jan 2001

Pycnothyrium Ultrastructure In Tubakia Dryina [Abstract], Josephine Taylor

Faculty Publications

No abstract provided.

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A Red-Cockaded Woodpecker Group With Two Simultaneous Nest Trees, Richard N. Conner, James R. Mccormick, Richard R. Schaefer, Daniel Saenz, D. Craig Rudolph Jan 2001

A Red-Cockaded Woodpecker Group With Two Simultaneous Nest Trees, Richard N. Conner, James R. Mccormick, Richard R. Schaefer, Daniel Saenz, D. Craig Rudolph

Faculty Publications

During a study of Red-cockaded Woodpecker (Picoides borealis) nesting in eastern Texas, we discovered a single breeding pair of woodpeckers with two simultaneous nests in nest trees that were 24 m apart. Incubation of eggs in each nest tree was at least 13 d and may have been as long as 16 d. The breeding male incubated and fed a nestling in one nest tree, and the breeding female incubated and fed a nestling in the other nest tree until the nestlings were >24 d old. Prior to fledging, both the breeding male and female were observed feeding …

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An Unusually Large Number Of Eggs Laid By A Breeding Red-Cockaded Woodpecker Female, Richard N. Conner, Daniel Saenz, James R. Mccormick Jan 2001

An Unusually Large Number Of Eggs Laid By A Breeding Red-Cockaded Woodpecker Female, Richard N. Conner, Daniel Saenz, James R. Mccormick

Faculty Publications

The Red-cockaded Woodpecker (Picoides borealis) is a cooperatively breeding species that typically uses a single cavity for nesting (Ligon 1970, Walters et al. 1988). A single tree, or aggregation of cavity trees, termed the cluster, is inhabited by a group of woodpeckers that includes a single breeding pair and up to several helpers, which are typically male offspring of previous breeding seasons (Ligon 1970, Lennartz et al. 1987). Each group of Red-cockaded Woodpeckers usually produces one nest per breeding season, but will often nest again during the same breeding season if the first nest fails. Double clutching and …

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Delayed Reproduction Of Translocated Red-Cockaded Woodpeckers., Brent Burt, James R. Mccormick, Richard N. Conner, Daniel Saenz Jan 2001

Delayed Reproduction Of Translocated Red-Cockaded Woodpeckers., Brent Burt, James R. Mccormick, Richard N. Conner, Daniel Saenz

Faculty Publications

Twelve pairs of Red-cockaded Woodpeckers were translocated to the Angelina National Forest. Five breeding pairs produced eggs/nestlings within the first breeding season after translocation. Clutch initiation dates for all five pairs were later than those of resident breeders. The observed delay in reporductive timing by translocated woodpeckers may have resulted from a variety of factors.

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Amaranthus Rudis And A. Tuberculatus, One Species Or Two? [Abstract], Donald B. Pratt, Lynn G. Clark Jan 2001

Amaranthus Rudis And A. Tuberculatus, One Species Or Two? [Abstract], Donald B. Pratt, Lynn G. Clark

Faculty Publications

No abstract provided.

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Talking Through Meaning (Chapter 7 Of The Book Between Gay And Straight: Understanding Friendship Across Sexual Orientation), Lisa M. Tillmann Ph.D. Jan 2001

Talking Through Meaning (Chapter 7 Of The Book Between Gay And Straight: Understanding Friendship Across Sexual Orientation), Lisa M. Tillmann Ph.D.

Faculty Publications

Chapter 7 provides a dialogic analysis of my PhD dissertation research (1994-98) on a network of gay male friends in Tampa, Florida. The chapter is based on a conversation my husband Doug and I had while I was trying to compose a more conventional conclusion on gay-straight friendship and friendship as method. We discuss my project’s academic, personal, interpersonal, and cultural implications.

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Does Red-Cockaded Woodpecker Excavation Of Resin Wells Increase Risk Of Bark Beetle Infestation Of Cavity Trees?, Richard N. Conner, Daniel Saenz, D. Craig Rudolph, W. G. Ross, David Kulhavy, Robert Coulson Jan 2001

Does Red-Cockaded Woodpecker Excavation Of Resin Wells Increase Risk Of Bark Beetle Infestation Of Cavity Trees?, Richard N. Conner, Daniel Saenz, D. Craig Rudolph, W. G. Ross, David Kulhavy, Robert Coulson

Faculty Publications

No abstract provided.

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Impact Of The Texas Leaf-Cutting Ant (Atta Texana (Buckley) (Order Hymenoptera, Family Formicidae) On A Forested Landscape, David Kulhavy, L. A. Smith, W. G. Ross Jan 2001

Impact Of The Texas Leaf-Cutting Ant (Atta Texana (Buckley) (Order Hymenoptera, Family Formicidae) On A Forested Landscape, David Kulhavy, L. A. Smith, W. G. Ross

Faculty Publications

Atta texana (Buckley), the Texas leaf-cutting ant, rapidly expanded in a harvested forested landscape on sandhills characterized by droughty soils, causing mortality of planted loblolly pine (Pinus taeda (L.)). The site, composed primarily of Quartzipsamments soils classified as thermic coated Typic Quartzipsamments in the Tonkawa soil series, accounts for approximately 5,000 ha in Nacogdoches, Rusk, Panola, and San Augustine Counties in eastern Texas, USA (Dolezel 1980). These soils are characterized by low fertility, rapid permeability, and extreme acid reaction. These sandhills are resistant to erosion and are considered important ground water recharge areas. The distribution of A. texana central …

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A Role For Actin, Cdc1p, And Myo2p In The Inheritance Of Late Golgi Elements In Saccharomyces Cerevisiae, Olivia W. Rossanese, Catherine A. Reinke, Brooke J. Bevis, Adam T. Hammond, Irina B. Sears, James O'Connor, Benjamin S. Glick Jan 2001

A Role For Actin, Cdc1p, And Myo2p In The Inheritance Of Late Golgi Elements In Saccharomyces Cerevisiae, Olivia W. Rossanese, Catherine A. Reinke, Brooke J. Bevis, Adam T. Hammond, Irina B. Sears, James O'Connor, Benjamin S. Glick

Faculty Publications

In Saccharomyces cerevisiae, Golgi elements are present in the bud very early in the cell cycle. We have analyzed this Golgi inheritance process using fluorescence microscopy and genetics. In rapidly growing cells, late Golgi elements show an actin-dependent concentration at sites of polarized growth. Late Golgi elements are apparently transported into the bud along actin cables and are also retained in the bud by a mechanism that may involve actin. A visual screen for mutants defective in the inheritance of late Golgi elements yielded multiple alleles of CDC1. Mutations in CDC1 severely depolarize the actin cytoskeleton, and these …

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Facts, Shapes, Our Relationship With The Landscape: A Conversation With David Quammen, David Thomas Sumner Jan 2001

Facts, Shapes, Our Relationship With The Landscape: A Conversation With David Quammen, David Thomas Sumner

Faculty Publications

This interview with David Quammen is part of a series of conversations with contemporary western writers about the ethical and cultural implications of nature writing.

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Nature Writing, American Literature, And The Idea Of Community: A Conversation With Barry Lopez, David Thomas Sumner Jan 2001

Nature Writing, American Literature, And The Idea Of Community: A Conversation With Barry Lopez, David Thomas Sumner

Faculty Publications

This interview with Barry Lopez is part of a series of conversations with contemporary western writers about the ethical and cultural implications of nature writing.

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Chloropigment Distribution And Transport On The Inner Shelf Off Duck, North Carolina, E.J. D'Sa, S.E. Lohrenz, J.H. Churchill, V.L. Asper, J.L. Largier, A.J. Williams Iii Jan 2001

Chloropigment Distribution And Transport On The Inner Shelf Off Duck, North Carolina, E.J. D'Sa, S.E. Lohrenz, J.H. Churchill, V.L. Asper, J.L. Largier, A.J. Williams Iii

Faculty Publications

No abstract provided.

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The Professional Athlete: Issues In Child Support, Judith G. Mcmullen Jan 2001

The Professional Athlete: Issues In Child Support, Judith G. Mcmullen

Faculty Publications

No abstract provided.

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The Use Of Placebos In Clinical Trials: Responsible Research Or Unethical Practice?, Sharona Hoffman Jan 2001

The Use Of Placebos In Clinical Trials: Responsible Research Or Unethical Practice?, Sharona Hoffman

Faculty Publications

Developments in medical research have been occurring at a rapidly increasing rate during the past two decades. Expanding budgets, augmented computer capabilities, and new research tools have all dramatically enhanced research technology. Accompanying the proliferation of medical research are increasing concerns about research risks. This article focuses on placebo-controlled clinical trials. The use of placebos enables clinical investigators to compare results from subjects taking an experimental intervention to results from a group that is receiving an inactive substance, such as a sugar pill, in order to determine the efficacy of the new medication. In recent years, some surgeons have also …

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Sexual Dimorphism And Body Temperatures Of Sceloporus Siniferus From Guerrero, Mexico, J. A. Lemos-Espinal, Geoffrey R. Smith, R. E. Ballinger Jan 2001

Sexual Dimorphism And Body Temperatures Of Sceloporus Siniferus From Guerrero, Mexico, J. A. Lemos-Espinal, Geoffrey R. Smith, R. E. Ballinger

Faculty Publications

No abstract provided.

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Fabrication Of Nanometer-Sized Protein Patterns Using Atomic Force Microscopy And Selective Immobilization, Kapila Wadu-Mesthrige, Nabil A. Amro, Jayne C. Garno, Song Xu, Gang Yu Liu Jan 2001

Fabrication Of Nanometer-Sized Protein Patterns Using Atomic Force Microscopy And Selective Immobilization, Kapila Wadu-Mesthrige, Nabil A. Amro, Jayne C. Garno, Song Xu, Gang Yu Liu

Faculty Publications

A new methodology is introduced to produce nanometer-sized protein patterns. The approach includes two main steps, nanopatterning of self-assembled monolayers using atomic force microscopy (AFM)-based nanolithography and subsequent selective immobilization of proteins on the patterned monolayers. The resulting templates and protein patterns are characterized in situ using AFM. Compared with conventional protein fabrication methods, this approach is able to produce smaller patterns with higher spatial precision. In addition, fabrication and characterization are completed in near physiological conditions. The adsorption configuration and bioreactivity of the proteins within the nanopatterns are also studied in situ.

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Colonialism And Landscape In The Americas: Material/Conceptual Transformations And Continuing Consequences, Andrew Sluyter Jan 2001

Colonialism And Landscape In The Americas: Material/Conceptual Transformations And Continuing Consequences, Andrew Sluyter

Faculty Publications

No abstract provided.

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Ganadería Española Y Cambio Ambiental En Las Tierras Bajas Tropicales De Veracruz, México, Siglo Xvi, Andrew Sluyter Jan 2001

Ganadería Española Y Cambio Ambiental En Las Tierras Bajas Tropicales De Veracruz, México, Siglo Xvi, Andrew Sluyter

Faculty Publications

No abstract provided.

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Comparison Of Genomic And Predicted Amino Acid Sequences Of Respiratory And Enteric Bovine Coronaviruses Isolated From The Same Animal With Fatal Shipping Pneumonia, V. N. Chouljenko, X. Q. Lin, J. Storz, K. G. Kousoulas, A. E. Gorbalenya Jan 2001

Comparison Of Genomic And Predicted Amino Acid Sequences Of Respiratory And Enteric Bovine Coronaviruses Isolated From The Same Animal With Fatal Shipping Pneumonia, V. N. Chouljenko, X. Q. Lin, J. Storz, K. G. Kousoulas, A. E. Gorbalenya

Faculty Publications

The complete genome sequences are reported here of two field isolates of bovine coronavirus (BCoV), which were isolated from respiratory and intestinal samples of the same animal experiencing fatal pneumonia during a bovine shipping fever epizootic. Both genomes contained 31028 nucleotides and included 13 open reading frames (ORFs) flanked by 5′- and 3′-untranslated regions (UTRs). ORF1a and ORF1b encode replicative polyproteins pp1a and pp1ab, respectively, that contain all of the putative functional domains documented previously for the closest relative, mouse hepatitis virus. The genomes of the BCoV isolates differed in 107 positions, scattered throughout the genome except the 5′-UTR. Differences …

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Elucidation Of The Genomic Nucleotide Sequence Of Bovine Coronavirus And Analysis Of Cryptic Leader Mrna Fusion Sites, Vladimir N. Chouljenko, Timothy P. Foster, Xiaoqing Lin, Johannes Storz, Konstantin G. Kousoulas Jan 2001

Elucidation Of The Genomic Nucleotide Sequence Of Bovine Coronavirus And Analysis Of Cryptic Leader Mrna Fusion Sites, Vladimir N. Chouljenko, Timothy P. Foster, Xiaoqing Lin, Johannes Storz, Konstantin G. Kousoulas

Faculty Publications

No abstract provided.

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A Phylogenetic Analysis Of Variation In Reproductive Mode Within An Australian Lizard (Saiphos Equalis, Scincidae), Sarah A. Smith, Christopher C. Austin, Richard Shine Jan 2001

A Phylogenetic Analysis Of Variation In Reproductive Mode Within An Australian Lizard (Saiphos Equalis, Scincidae), Sarah A. Smith, Christopher C. Austin, Richard Shine

Faculty Publications

Saiphos equalis, a semi-fossorial scincid lizard from south-eastern Australia, is one of only three reptile species world-wide that are known to display geographic variation in reproductive mode. Uniquely, Saiphos equalis includes populations with three reproductive modes: oviparous with long (15-day) incubation periods; oviparous with short (5-day) incubation periods; and viviparous (0-day incubation periods). No Saipho populations show 'normal' scincid oviparity (>30-day incubation period). We used mitochondrial nucleotide sequences (ND2 and cytochrome b) to reconstruct relationships among populations from throughout the species' distribution in New South Wales, Australia. Under the phylogenetic species concept, phylogenetic analyses are consistent with the oviparous …

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Patterns Of Ancestral Human Diversity: An Analysis Of Alu-Insertion And Restriction-Site Polymorphisms, W. S. Watkins, C. E. Ricker, M. J. Bamshad, M. L. Carroll, S. V. Nguyen, M. A. Batzer, H. C. Harpending, A. R. Rogers, L. B. Jorde Jan 2001

Patterns Of Ancestral Human Diversity: An Analysis Of Alu-Insertion And Restriction-Site Polymorphisms, W. S. Watkins, C. E. Ricker, M. J. Bamshad, M. L. Carroll, S. V. Nguyen, M. A. Batzer, H. C. Harpending, A. R. Rogers, L. B. Jorde

Faculty Publications

We have analyzed 35 widely distributed, polymorphic Alu loci in 715 individuals from 31 world populations. The average frequency of Alu insertions (the derived state) is lowest in Africa (.42) but is higher and similar in India (.55), Europe (.56), and Asia (.57). A comparison with 30 restriction-site polymorphisms (RSPs) for which the ancestral state has been determined shows that the frequency of derived RSP alleles is also lower in Africa (.35) than it is in Asia (.45) and in Europe (.46). Neighbor-joining networks based on Alu insertions or RSPs are rooted in Africa and show African populations as separate …

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Phylogeny Of The Celastraceae Inferred From Phytochrome B Gene Sequence And Morphology, Mark P. Simmons, Curtis C. Clevinger, Vincent Savolainen, Robert H. Archer, Sarah Mathews, Jeff J. Doyle Jan 2001

Phylogeny Of The Celastraceae Inferred From Phytochrome B Gene Sequence And Morphology, Mark P. Simmons, Curtis C. Clevinger, Vincent Savolainen, Robert H. Archer, Sarah Mathews, Jeff J. Doyle

Faculty Publications

Phylogenetic relationships within Celastraceae were inferred using a simultaneous analysis of 61 morphological characters and 1123 base pairs of phytochrome B exon 1 from the nuclear genome. No gaps were interred, and the gene tree topology suggests that the primers were specific to a single locus that did not duplicate among the lineages sampled. This region of phytochrome B was most useful for examining relationships among closely related genera. Fifty-one species from 38 genera of Celastraceae were sampled. The Celastraceae sensu lato (including Hippocrateaceae) were resolved as a monophyletic group. Loesener's subfamilies and tribes of Celastraceae were not supported. The …

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The Genetics Of Reproductive Isolation And The Potential For Gene Exchange Between Drosophila Pseudoobscura And D. Persimilis Via Backcross Hybrid Males, Mohamed A.F. Noor, Katherine L. Grams, Lisa A. Bertucci, Yvette Almendarez, Jane Reiland, Kelley R. Smith Jan 2001

The Genetics Of Reproductive Isolation And The Potential For Gene Exchange Between Drosophila Pseudoobscura And D. Persimilis Via Backcross Hybrid Males, Mohamed A.F. Noor, Katherine L. Grams, Lisa A. Bertucci, Yvette Almendarez, Jane Reiland, Kelley R. Smith

Faculty Publications

Hybrid male sterility, hybrid inviability, sexual isolation, and a hybrid male courtship dysfunction reproductively isolate Drosophila pseudoobscura and D. persimilis. Previous studies of the genetic bases of these isolating mechanisms have yielded only limited information about how much and what areas of the genome are susceptible to interspecies introgression. We have examined the genetic basis of these barriers to gene exchange in several thousand backcross hybrid male progeny of these species using 14 codominant molecular genetic markers spanning the five chromosomes of these species, focusing particularly on the autosomes. Hybrid male sterility, hybrid inviability, and the hybrid male courtship dysfunction …

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Estimating The Unbiased Estimator Θ For Population Genetic Survey Data, Jacqueline J. Weicker, Robb T. Brumfield, Kevin Winker Jan 2001

Estimating The Unbiased Estimator Θ For Population Genetic Survey Data, Jacqueline J. Weicker, Robb T. Brumfield, Kevin Winker

Faculty Publications

We consider a method of approximating Weir and Cockerham's θ, an unbiased estimator of genetic population structure, using values readily available from published studies using biased estimators (Wright's FST or Nei's GST). The estimation algorithm is shown to be useful for both model populations and real-world avian populations. However, the correlation between Wright's FST and Weir and Cockerham's θ is strong when compared among 39 empirical avian datasets. Thus, the advantage of approximating an unbiased estimator is unclear considering the small actual effect of θ's bias-removing power on empirical datasets.

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