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Climatically Driven Loss Of Calcium In Steppe Soil As A Sink For Atmospheric Carbon, A. G. Lapenis, G. B. Lawrence, S. W. Bailey, B. F. Aparin, Alexander I. Shiklomanov, N. A. Speranskaya, M. S. Torn, M. Calef May 2008

Climatically Driven Loss Of Calcium In Steppe Soil As A Sink For Atmospheric Carbon, A. G. Lapenis, G. B. Lawrence, S. W. Bailey, B. F. Aparin, Alexander I. Shiklomanov, N. A. Speranskaya, M. S. Torn, M. Calef

Faculty Publications

During the last several thousand years the semi‐arid, cold climate of the Russian steppe formed highly fertile soils rich in organic carbon and calcium (classified as Chernozems in the Russian system). Analysis of archived soil samples collected in Kemannaya Steppe Preserve in 1920, 1947, 1970, and fresh samples collected in 1998 indicated that the native steppe Chernozems, however, lost 17–28 kg m−2 of calcium in the form of carbonates in 1970–1998. Here we demonstrate that the loss of calcium was caused by fundamental shift in the steppe hydrologic balance. Previously unleached soils where precipitation was less than potential evapotranspiration are …

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The Practical Effects Of Delegation: Agencies And The Zoning Of Public Land And Seas, Josh Eagle May 2008

The Practical Effects Of Delegation: Agencies And The Zoning Of Public Land And Seas, Josh Eagle

Faculty Publications

No abstract provided.

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Effect Of Epigenetic Modifications Of Donor Somatic Cells On The Subsequent Chromatin Remodeling Of Cloned Bovine Embryos, Angelica M. Giraldo, Darin A. Hylan, Casey B. Ballard, Megan N. Purpera, Todd D. Vaught, John W. Lynn, Robert A. Godke, Kenneth R. Bondioli May 2008

Effect Of Epigenetic Modifications Of Donor Somatic Cells On The Subsequent Chromatin Remodeling Of Cloned Bovine Embryos, Angelica M. Giraldo, Darin A. Hylan, Casey B. Ballard, Megan N. Purpera, Todd D. Vaught, John W. Lynn, Robert A. Godke, Kenneth R. Bondioli

Faculty Publications

Evidence indicates that failure of nuclear transfer (NT) embryos to develop normally can be attributed, at least partially, to the use of differentiated cells as the donor karyoplast. Blastocyst production and development to term of cloned embryos has been hypothesized to differ between population doublings of the same cell line as a consequence of changes in the levels of DNA methyltransferase 1 (DNMT1) and methylated DNA during in vitro culture. The objective of this study was to determine embryo production, developmental potential, and gene expression patterns of prehatched and posthatched embryos generated using donor cells with different levels of DNMT1 …

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Temperature-Dependent Development, Survival, And Potential Distribution Of Ischnodemus Variegatus (Hemiptera: Blissidae), A Herbivore Of West Indian Marsh Grass, Rodrigo Diaz, William A. Overholt, J. P. Cuda, Paul D. Pratt, Alison Fox May 2008

Temperature-Dependent Development, Survival, And Potential Distribution Of Ischnodemus Variegatus (Hemiptera: Blissidae), A Herbivore Of West Indian Marsh Grass, Rodrigo Diaz, William A. Overholt, J. P. Cuda, Paul D. Pratt, Alison Fox

Faculty Publications

The bug Ischnodemus variegatus (Signoret) (Hemiptera: Blissidae) is an adventive herbivore, native to South America that feeds in the invasive grass Hymenachne amplexicaulis (Rudge) Nees (Poaceae). This grass is a problematic weed in Florida and Australia, but it is a highly valued forage in Mexico, Cuba, and Venezuela. We studied the influence of nine constant temperatures (8-38°C) on the developmental time and survival of I. variegatus. Complete egg and nymphal mortality occurred at temperatures ≤20.5°C and at 38°C. Developmental time decreased linearly with temperature until 28-30°C and then increased at 33°C. Mortality of first, second, and third instars was high …

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Chiral Recognition Of Amino Acids By Use Of A Fluorescent Resorcinarene, Gerald I. Richard, Hadi M. Marwani, Shan Jiang, Sayo O. Fakayode, Mark Lowry, Robert M. Strongin, Isiah M. Warner May 2008

Chiral Recognition Of Amino Acids By Use Of A Fluorescent Resorcinarene, Gerald I. Richard, Hadi M. Marwani, Shan Jiang, Sayo O. Fakayode, Mark Lowry, Robert M. Strongin, Isiah M. Warner

Faculty Publications

The spectroscopic properties of a chiral boronic acid based resorcinarene macrocycle employed for chiral analysis were investigated. Specifically, the emission and excitation characteristics of tetraarylboronate resorcinarene macrocycle (TBRM) and its quantum yield were evaluated. The chiral selector TBRM was investigated as a chiral reagent for the enantiomeric discrimination of amino acids using steady-state fluorescence spectroscopy. Chiral recognition of amino acids in the presence of the macrocycle was based on diastereomeric complexes. Results demonstrated that TBRM had better chiral discrimination ability for lysine as compared to the other amino acids. Partial least squares regression modeling (PLS-1) of spectral data for macrocycle-lysine …

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Stand Structure And Dynamics Of Sand Pine Differ Between The Florida Panhandle And Peninsula, Paul B. Drewa, William J. Platt, Charles Kwit, Thomas W. Doyle May 2008

Stand Structure And Dynamics Of Sand Pine Differ Between The Florida Panhandle And Peninsula, Paul B. Drewa, William J. Platt, Charles Kwit, Thomas W. Doyle

Faculty Publications

Size and age structures of stand populations of numerous tree species exhibit uneven or reverse J-distributions that can persist after non-catastrophic disturbance, especially windstorms. Among disjunct populations of conspecific trees, alternative distributions are also possible and may be attributed to more localized variation in disturbance. Regional differences in structure and demography among disjunct populations of sand pine (Pinus clausa (Chapm. ex Engelm.) Vasey ex Sarg.) in the Florida panhandle and peninsula may result from variation in hurricane regimes associated with each of these populations. We measured size, age, and growth rates of trees from panhandle and peninsula populations and then …

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Culture-Independent Identification Of Gut Bacteria In Fourth-Instar Red Imported Fire Ant, Solenopsis Invicta Buren, Larvae, Albert H. Lee, Claudia Husseneder, Linda Hooper-Bùi May 2008

Culture-Independent Identification Of Gut Bacteria In Fourth-Instar Red Imported Fire Ant, Solenopsis Invicta Buren, Larvae, Albert H. Lee, Claudia Husseneder, Linda Hooper-Bùi

Faculty Publications

Red imported fire ants (RIFA), Solenopsis invicta Buren, are medical, urban, and agricultural pests from South America. They are successful invaders due to their preference for disturbed habitats, high reproductive rates, and the ability to feed on a wide variety of food items (omnivorous). Fourth-instar larvae are used by the colony to digest solid food and then regurgitate it for consumption by workers and queens. Larvae are an ideal source of investigations of endosymbiotic bacteria possibly involved in nutrient distributions. Our study utilized 16S rDNA sequencing to describe the composition of the bacterial community in fourth-instar ant larvae in order …

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Chimpanzees Do Not Take Advantage Of Very Low Cost Opportunities To Deliver Food To Unrelated Group Members, Jennifer Vonk, Sarah F. Brosnan, Joan B. Silk, Joseph Heinrich, Amanda S. Richardson, Susan P. Lambeth, Steven J. Schapiro, Daniel J. Povinelli May 2008

Chimpanzees Do Not Take Advantage Of Very Low Cost Opportunities To Deliver Food To Unrelated Group Members, Jennifer Vonk, Sarah F. Brosnan, Joan B. Silk, Joseph Heinrich, Amanda S. Richardson, Susan P. Lambeth, Steven J. Schapiro, Daniel J. Povinelli

Faculty Publications

We conducted experiments on two populations of chimpanzees, Pan troglodytes, to determine whether they would take advantage of opportunities to provide food rewards to familiar group members at little cost to themselves. In both of the experiments described here, chimpanzees were able to deliver identical rewards to themselves and to other members of their social groups. We compared the chimpanzees' behaviour when they were paired with another chimpanzee and when they were alone. If chimpanzees are motivated to provide benefits to others, they are expected to consistently deliver rewards to others and to distinguish between the partner-present and partner-absent …

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Making The Implicit Explicit: Creating Performance Expectations For The Dissertation, Debra S. Gentry May 2008

Making The Implicit Explicit: Creating Performance Expectations For The Dissertation, Debra S. Gentry

Faculty Publications

No abstract provided.

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Comparative Phylogeography Of Codistributed Species Of Chilean Liolaemus (Squamata: Tropiduridae) From The Central-Southern Andean Range, Byron J. Adams, Pedro F. Victoriano, Juan Carlos Ortiz, Edgar Benavides, Jack W. Sites May 2008

Comparative Phylogeography Of Codistributed Species Of Chilean Liolaemus (Squamata: Tropiduridae) From The Central-Southern Andean Range, Byron J. Adams, Pedro F. Victoriano, Juan Carlos Ortiz, Edgar Benavides, Jack W. Sites

Faculty Publications

In this study, we used a recently developed supertrees method to test for shared phylogeographical signal in partially overlapping geographical ranges of lizards of the genus Liolaemus from the Andean Range in south-central Chile. We reconstruct mtDNA gene trees for three partially codistributed species (Liolaemus tenuis, L. lemniscatus and L. pictus), and our sampling effort is sufficient to allow statistical tests of shared signal between the combinations L. tenuis-L. pictus, and L. tenuis-L. lemniscatus. For both combinations, standardized maximum agreement subtrees scores showed statistically significant signal for shared pattern in regions of overlap, as evaluated by randomization tests (P < 0.001 and < 0.05, respectively). The matrix representation with parsimony tree obtained from the combination of the three different gene trees revealed concordant phylogeographical associations of all species, and was consistent with the geographical association of intraspecific haploclades with three Chilean bioclimatic zones. A multidimensional scaling analysis of several climate variables showed highly significant differences among these zones, which further suggests that they may have contributed to similar patterns of intraspecific divergence across all three species. In the mesomorphic zone in Central Chile, the species L. tenuis and L. lemniscatus may have codiverged in response to shared orogenic vicariant events, which likely predominated over climatic events associated with cycles of glacial advance and retreat. In the hygromorphic zone in southern Chile, however, glacial cycles likely predominated in structuring the phylogeographical histories of L. tenuis and L. pictus, although important ecological differences between these two caution against broad generalizations at this point.

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Reply To Comment By K. Gajewski On "Abrupt Environmental Change In Canada's Northernmost Lake", Dermot Antoniades, Catherine Crawley, Marianne S.V. Douglas, Reinhard Pienitz, Dale Andersen, Peter T. Doran, Ian Hawes, Wayne Pollard, Warwick F. Vincent Apr 2008

Reply To Comment By K. Gajewski On "Abrupt Environmental Change In Canada's Northernmost Lake", Dermot Antoniades, Catherine Crawley, Marianne S.V. Douglas, Reinhard Pienitz, Dale Andersen, Peter T. Doran, Ian Hawes, Wayne Pollard, Warwick F. Vincent

Faculty Publications

We welcome the opportunity to respond to Gajewski's [2008] comments on our study [Antoniades et al., 2007, hereinafter referred to as A07]. We demonstrate here that his assertions are not supported by the evidence and that the conclusions in A07 are based on a sound interpretation of the data. Copyright 2008 by the American Geophysical Union.

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Reducing Stray Radiation Dose To Patients Receiving Passively Scattered Proton Radiotherapy For Prostate Cancer, Phillip J. Taddei, Jonas D. Fontenot, Yuanshui Zheng, Dragan Mirkovic, Andrew K. Lee, Uwe Titt, Wayne D. Newhauser Apr 2008

Reducing Stray Radiation Dose To Patients Receiving Passively Scattered Proton Radiotherapy For Prostate Cancer, Phillip J. Taddei, Jonas D. Fontenot, Yuanshui Zheng, Dragan Mirkovic, Andrew K. Lee, Uwe Titt, Wayne D. Newhauser

Faculty Publications

Proton beam radiotherapy exposes healthy tissue to stray radiation emanating from the treatment unit and secondary radiation produced within the patient. These exposures provide no known benefit and may increase a patient's risk of developing a radiogenic second cancer. The aim of this study was to explore strategies to reduce stray radiation dose to a patient receiving a 76 Gy proton beam treatment for cancer of the prostate. The whole-body effective dose from stray radiation, E, was estimated using detailed Monte Carlo simulations of a passively scattered proton treatment unit and an anthropomorphic phantom. The predicted value of E was …

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A Deletion Mutant Of Vitronectin Lacking The Somatomedin B Domain Exhibits Residual Plasminogen Activator Inhibitor-1-Binding Activity, Christine R. Schar, Grant E. Blouse, Kenneth H. Minor, Cynthia B. Peterson Apr 2008

A Deletion Mutant Of Vitronectin Lacking The Somatomedin B Domain Exhibits Residual Plasminogen Activator Inhibitor-1-Binding Activity, Christine R. Schar, Grant E. Blouse, Kenneth H. Minor, Cynthia B. Peterson

Faculty Publications

Vitronectin and plasminogen activator inhibitor-1 (PAI-1) are important physiological binding partners that work in concert to regulate cellular adhesion, migration, and fibrinolysis. The high affinity binding site for PAI-1 is located within the N-terminal somatomedin B domain of vitronectin; however, several studies have suggested a second PAI-1-binding site within vitronectin. To investigate this secondary site, a vitronectin mutant lacking the somatomedin B domain (rΔsBVN) was engineered. The short deletion had no effect on heparin-binding, integrin-binding, or cellular adhesion. Binding to the urokinase receptor was completely abolished while PAI-1 binding was still observed, albeit with a lower affinity. Analytical ultra-centrifugation on …

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Co2 Fixation Kinetics Of Halothiobacillus Neapolitanus Mutant Carboxysomes Lacking Carbonic Anhydrase Suggest The Shell Acts As A Diffusional Barrier For Co2, Zhicheng Dou, Sabine Heinhorst, Eric B. Williams, C. Daniel Murin, Jessup M. Shively, Gordon C. Cannon Apr 2008

Co2 Fixation Kinetics Of Halothiobacillus Neapolitanus Mutant Carboxysomes Lacking Carbonic Anhydrase Suggest The Shell Acts As A Diffusional Barrier For Co2, Zhicheng Dou, Sabine Heinhorst, Eric B. Williams, C. Daniel Murin, Jessup M. Shively, Gordon C. Cannon

Faculty Publications

The widely accepted models for the role of carboxysomes in the carbon-concentrating mechanism of autotrophic bacteria predict the carboxysomal carbonic anhydrase to be a crucial component. The enzyme is thought to dehydrate abundant cytosolic bicarbonate and provide ribulose 1.5-bisphosphate carboxylase/oxygenase (RubisCO) sequestered within the carboxysome with sufficiently high concentrations of its substrate, CO2, to permit its efficient fixation onto ribulose 1,5-bisphosphate. In this study, structure and function of carboxysomes purified from wild type Halothiobacillus neapolitanus and from a high CO2-requiring mutant that is devoid of carboxysomal carbonic anhydrase were compared. The kinetic constants for the carbon …

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Duplicate Gene Expression In Allopolyploid Gossypium Reveals Two Temporally Distinct Phases Of Expression Evolution, Joshua Udall, Lex E. Flagel, Dan Nettleton, Jonathan F. Wendel Apr 2008

Duplicate Gene Expression In Allopolyploid Gossypium Reveals Two Temporally Distinct Phases Of Expression Evolution, Joshua Udall, Lex E. Flagel, Dan Nettleton, Jonathan F. Wendel

Faculty Publications

Polyploidy has played a prominent role in shaping the genomic architecture of the angiosperms. Through allopolyploidization, several modern Gossypium (cotton) species contain two divergent, although largely redundant genomes. Owing to this redundancy, these genomes can play host to an array of evolutionary processes that act on duplicate genes. Results- We compared homoeolog (genes duplicated by polyploidy) contributions to the transcriptome of a natural allopolyploid and a synthetic interspecific F1 hybrid, both derived from a merger between diploid species from the Gossypium A-genome and D-genome groups. Relative levels of A- and D-genome contributions to the petal transcriptome were determined for 1,383 …

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Prevalence Of Temperature-Dependent Heat Capacity Changes In Protein-Dna Interactions, Chin Chi Liu, Allison J. Richard, Kausiki Datta, Vince J. Licata Apr 2008

Prevalence Of Temperature-Dependent Heat Capacity Changes In Protein-Dna Interactions, Chin Chi Liu, Allison J. Richard, Kausiki Datta, Vince J. Licata

Faculty Publications

A large, negative ΔCp of DNA binding is a thermodynamic property of the majority of sequence-specific DNA-protein interactions, and a common, but not universal property of non-sequence-specific DNA binding. In a recent study of the binding of Taq polymerase to DNA, we showed that both the full-length polymerase and its "Klentaq" large fragment bind to primed-template DNA with significant negative heat capacities. Herein, we have extended this analysis by analyzing this data for temperature-variable heat capacity effects (ΔΔCp), and have similarly analyzed an additional 47 protein-DNA binding pairs from the scientific literature. Over half of the systems examined can be …

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Gold Nanoparticle Sensor For Homocysteine Thiolactone-Induced Protein Modification, Arther T. Gates, Sayo O. Fakayode, Mark Lowry, Gabriela M. Ganea, Abitha Murugeshu, James W. Robinson, Robert M. Strongin, Isiah M. Warner Apr 2008

Gold Nanoparticle Sensor For Homocysteine Thiolactone-Induced Protein Modification, Arther T. Gates, Sayo O. Fakayode, Mark Lowry, Gabriela M. Ganea, Abitha Murugeshu, James W. Robinson, Robert M. Strongin, Isiah M. Warner

Faculty Publications

Homocysteine thiolactone-induced protein modification (HTPM) is a unique post-translational protein modification that is recognized as an emergent biomarker for cardiovascular disease. HTPM involves the site-specific acylation of proteins at lysine residues by homocysteine thiolactone (HTL) to produce protein homocystamide, which has been found at elevated levels in patients with coronary heart disease. Herein, we report the development of a novel gold nanoparticle (GNP) biochemical sensor for detection of protein homocystamide in an in vitro serum protein-based model system. Human serum albumin (HSA) and human sera were subjected to HTPM in vitro to produce HSA-homocystamide or serum protein homocystamide, respectively, which …

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W(H)Ither Fossils? Studying Morphological Character Evolution In The Age Of Molecular Sequences, Elizabeth J. Hermsen, Jonathan R. Hendricks Apr 2008

W(H)Ither Fossils? Studying Morphological Character Evolution In The Age Of Molecular Sequences, Elizabeth J. Hermsen, Jonathan R. Hendricks

Faculty Publications

A major challenge in the post-genomics era will be to integrate molecular sequence data from extant organisms with morphological data from fossil and extant taxa into a single, coherent picture of phylogenetic relationships; only then will these phylogenetic hypotheses be effectively applied to the study of morphological character evolution. At least two analytical approaches to solving this problem have been utilized: (1) simultaneous analysis of molecular sequence and morphological data with fossil taxa included as terminals in the analysis, and (2) the molecular scaffold approach, in which morphological data are analyzed over a molecular backbone (with constraints that force extant …

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Airborne Laser Scanning Quantification Of Disturbances From Hurricanes And Lightning Strikes To Mangrove Forests In Everglades National Park, Usa, Keqi Zhang, Marc Simard, Michael Ross, Victor H. Rivera-Monroy, Patricia Houle, Pablo Ruiz, Robert R. Twilley, Kevin R.T. Whelan Apr 2008

Airborne Laser Scanning Quantification Of Disturbances From Hurricanes And Lightning Strikes To Mangrove Forests In Everglades National Park, Usa, Keqi Zhang, Marc Simard, Michael Ross, Victor H. Rivera-Monroy, Patricia Houle, Pablo Ruiz, Robert R. Twilley, Kevin R.T. Whelan

Faculty Publications

Airborne light detection and ranging (LIDAR) measurements derived before and after Hurricanes Katrina and Wilma (2005) were used to quantify the impact of hurricanes and lightning strikes on the mangrove forest at two sites in Everglades National Park (ENP). Analysis of LIDAR measurements covering 61 and 68 ha areas of mangrove forest at the Shark River and Broad River sites showed that the proportion of high tree canopy detected by the LIDAR after the 2005 hurricane season decreased significantly due to defoliation and breakage of branches and trunks, while the proportion of low canopy and the ground increased drastically. Tall …

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Effects Of Imperfect Dynamic Clamp: Computational And Experimental Results., Bettencourt Jc, Lillis Kp, Stupin Lr, White Ja Apr 2008

Effects Of Imperfect Dynamic Clamp: Computational And Experimental Results., Bettencourt Jc, Lillis Kp, Stupin Lr, White Ja

Faculty Publications

No abstract provided.

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Gone But Not Forgotten: The Strange Afterlife Of The Jay Treaty's Indian Free Passage Right, Marcia A. Yablon-Zug Apr 2008

Gone But Not Forgotten: The Strange Afterlife Of The Jay Treaty's Indian Free Passage Right, Marcia A. Yablon-Zug

Faculty Publications

No abstract provided.

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Further Characterization Of Vibrio Vulnificus Rugose Variants And Identification Of A Capsular And Rugose Exopolysaccharide Gene Cluster, Brenda L. Grau, Margaret C. Henk, Katherine L. Garrison, Brett J. Olivier, Randall M. Schulz, Kathy L. O'Reilly, Gregg S. Pettis Apr 2008

Further Characterization Of Vibrio Vulnificus Rugose Variants And Identification Of A Capsular And Rugose Exopolysaccharide Gene Cluster, Brenda L. Grau, Margaret C. Henk, Katherine L. Garrison, Brett J. Olivier, Randall M. Schulz, Kathy L. O'Reilly, Gregg S. Pettis

Faculty Publications

Capsular polysaccharide (CPS) is a major virulence factor in Vibrio vulnificus, and encapsulated strains have an opaque, smooth (OpS) colony morphology, while nonencapsulated strains have a translucent, smooth (TrS) colony morphology. Previously, we showed that OpS and TrS parental strains can yield a third colony type, rugose (R), and that the resulting strains, with the OpR and TrR phenotypes, respectively, form copious biofilms. Here we show that while OpR and TrR strains both produce three-dimensional biofilm structures that are indicative of rugose extracellular polysaccharide (rEPS) production, OpR strains also retain expression of CPS and are virulent in an iron-supplemented mouse …

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The Sinorhizobium Meliloti Msba2 Protein Is Essential For The Legume Symbiosis, Sebastian Beck, Victoria L. Marlow, Katy Woodall, William T. Doerrler, Euan K. James, Gail P. Ferguson Apr 2008

The Sinorhizobium Meliloti Msba2 Protein Is Essential For The Legume Symbiosis, Sebastian Beck, Victoria L. Marlow, Katy Woodall, William T. Doerrler, Euan K. James, Gail P. Ferguson

Faculty Publications

Sinorhizobium meliloti is a beneficial legume symbiont, closely related to Brucella species, which are chronic mammalian pathogens. We discovered that the S. meliloti MsbA2 protein is essential to ensure the symbiotic interaction with the host plant, alfalfa. S. meliloti invades plant cells via plant-derived structures known as infection threads. However, in the absence of MsbA2, S. meliloti remains trapped within abnormally thickened infection threads and induces a heightened plant defence response, characterized by a substantial thickening of the nodule endodermis layer and the accumulation of polyphenolic compounds. The S. meliloti MsbA2 protein is homologous to the Escherichia coli lipopolysaccharide/phospholipid trafficking …

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An Appreciation Of Marc Galanter's Scholarship, John M. Lande Apr 2008

An Appreciation Of Marc Galanter's Scholarship, John M. Lande

Faculty Publications

This brief essay highlights three of Marc Galanter's works to illustrate qualities that seem especially worth emulating. Galanter's classic article, Why the “Haves” Come Out Ahead: Speculations on the Limits of Legal Change, focuses on how the legal system actually operates in daily life and challenges a conventional wisdom that simply providing have-nots with more lawyers would substantially reduce inequality. The article is particularly relevant to the dispute resolution field, focusing on the vast majority of legally-oriented behavior that occurs outside of court. It distinguishes truly private dispute resolution (such as self-help, withdrawal from relationships, and intra-group processes) from settlement …

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Photothermal Deflection Determination Of Iron(Ii) With Ferrozine With Sorption Preconcentration On Silufol Plates, A. D. Khrycheva, D. A. Nedosekin, M. A. Proskurnin, M. Y. Kononets, S. V. Pakhomova, W. Faubel Apr 2008

Photothermal Deflection Determination Of Iron(Ii) With Ferrozine With Sorption Preconcentration On Silufol Plates, A. D. Khrycheva, D. A. Nedosekin, M. A. Proskurnin, M. Y. Kononets, S. V. Pakhomova, W. Faubel

Faculty Publications

Photothermal deflection spectroscopy was applied to the selective detection of iron(II) chelate with ferrozine by its sorption preconcentration on Silufol plates. The linearity range was 1 × 10-11-6 × 10 -8 mol cm-2 of chelate at the plate surface, which corresponded to 1 × 10-9 × 10-6 M of chelate in solution. The limits of detection and quantification are 8 × 10 -12 and 2.5 × 10-11 mol cm-2 at the plate from 15 μL of test solution (0.5 nM and 1.5 nM in solution, respectively), and the absolute detection limit is 8 fmol in the whole spot applied to …

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Legal Theoretic Inadequacy And Obesity Epidemic Analysis, David Yosifon Apr 2008

Legal Theoretic Inadequacy And Obesity Epidemic Analysis, David Yosifon

Faculty Publications

This Article explores crucial analytic and normative limitations in presently dominant and ascendant approaches to legal theory. The approaches' failure to provide a satisfying framework for analyzing the obesity epidemic presently raging undeterred in American society reveals these limitations. Conventional law and economics scholars writing on the subject have deployed familiar frameworks to reach predictable conclusions that are neither intellectually nor morally justifiable. This Article argues that recent theoretical innovations promulgated within the burgeoning law and behavioralism movement have thus far provided no more reliable a framework for legal analysis of the obesity epidemic than has conventional law and economics. …

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Hurricane Katrina Winds Measured By A Buoy-Mounted Sonic Anemometer, Stephan D. Howden, David Gilhousen, Norman Guinasso, John Walpert, Michael Sturgeon, Les Bender Apr 2008

Hurricane Katrina Winds Measured By A Buoy-Mounted Sonic Anemometer, Stephan D. Howden, David Gilhousen, Norman Guinasso, John Walpert, Michael Sturgeon, Les Bender

Faculty Publications

The eye of Hurricane Katrina passed within 49 n mi of an oceanographic observing system buoy in the Mississippi Bight that is part of the Central Gulf of Mexico Ocean Observing System. Although a mechanical anemometer failed on the buoy during the hurricane, a two-axis sonic anemometer survived and provided a complete record of the hurricane's passage. This is the first reported case of a sonic anemometer surviving a hurricane and reporting validated data, and it demonstrates that this type of anemometer is a viable alternative to the mechanical anemometers traditionally used in marine applications. The buoy pitch and roll …

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Gender Differences In The Response To Competition, Joseph Price Apr 2008

Gender Differences In The Response To Competition, Joseph Price

Faculty Publications

To investigate whether men and women respond differently to competition and whether this response depends on the gender mix of the group, the author examines outcomes of the Mellon Foundation's Graduate Education Initiative, a competitive fellowship program instituted in 1991 that was aimed at increasing graduation rates and decreasing time to degree. Men's performance, as measured by time to candidacy, increased 10% in response to the program, with the largest gains for men in departments with the highest proportions offemale students. Women did not increase performance, on average, but the response of women did differ greatly depending on the gender …

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Excess 210Pb Inventories And Fluxes Along The Continental Slope And Basins Of The Gulf Of Papua, Zahid Muhammad, Samuel J. Bentley, Lawrence A. Febo, André W. Droxler, Gerald R. Dickens, Larry C. Peterson, Bradley N. Opdyke Mar 2008

Excess 210Pb Inventories And Fluxes Along The Continental Slope And Basins Of The Gulf Of Papua, Zahid Muhammad, Samuel J. Bentley, Lawrence A. Febo, André W. Droxler, Gerald R. Dickens, Larry C. Peterson, Bradley N. Opdyke

Faculty Publications

Sediment samples were collected from continental slopes and marginal basins in the Gulf of Papua and analyzed for excess 210Pb to elucidate transport processes of fine-grained particles to this region. Estimated excess 210Pb fluxes of 1.0-12.8 dpm cm-2 a-1 were derived from measured seabed inventories. Highest sediment accumulation rates (0.28-0.35 cm a-) were measured along the northeastern shelf edge, and they decrease in seaward directions and along isobaths to the southwest. The excess 210Pb flux could result from either focused deposition of high-210Pb activity sediments from the continental shelf and upper slope or scavenging of 210Pb brought landward from deep-sea …

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Late Pleistocene And Holocene Sedimentation, Organic-Carbon Delivery, And Paleoclimatic Inferences On The Continental Slope Of The Northern Pandora Trough, Gulf Of Papua, Lawrence A. Febo, Samuel J. Bentley, John H. Wrenn, André W. Droxler, Gerald R. Dickens, Larry C. Peterson, Bradley N. Opdyke Mar 2008

Late Pleistocene And Holocene Sedimentation, Organic-Carbon Delivery, And Paleoclimatic Inferences On The Continental Slope Of The Northern Pandora Trough, Gulf Of Papua, Lawrence A. Febo, Samuel J. Bentley, John H. Wrenn, André W. Droxler, Gerald R. Dickens, Larry C. Peterson, Bradley N. Opdyke

Faculty Publications

We investigated sediment and organic-carbon accumulation rates in two jumbo piston cores (MV-54, MV-51) retrieved from the midslope of the northeastern Pandora Trough in the Gulf of Papua, Papua New Guinea. Our data provide a first assessment of mass fluxes over the past ∼33,000 14C years B.P. and variations in organic-carbon sources. Core sediments were analyzed using a suite of physical properties, organic geochemistry, and micropaleontological measurements. MV-54 and MV-51 show two periods of rapid sediment accumulation. The first interval is from ∼15,000 to 20,400 Cal. years B.P. (MV-51: ∼1.09 in ka-1 and ∼81.2 g cm-2 ka-1) and the second …

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