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Fa Composition Of Crude Oil Recovered From Catfish Viscera, Subramaniam Sathivel, Witoon Prinyawiwatkul, Casey C. Grimm, Joan M. King, Steven Lloyd Jan 2002

Fa Composition Of Crude Oil Recovered From Catfish Viscera, Subramaniam Sathivel, Witoon Prinyawiwatkul, Casey C. Grimm, Joan M. King, Steven Lloyd

Faculty Publications

The FA composition of crude catfish oil recovered from whole viscera, digestive tract, liver, gallbladder, and visceral storage fat was determined and compared with that of fillet and nugget (abdominal portion). About 34% crude fat (wet basis) could be recovered from the whole catfish viscera. FA found in crude catfish visceral oil were C14:0, C16:0, C16:1, C18:0, C18:1, C18:2, C18:3, C20:0, C20:1, C20:2, C20:3, C20:4, and C22:6, the predominant FA being C18:1, C16:0, C18:2, and C18:0. Catfish visceral oil was characterized by a high level of unsaturated FA, which was similarly found in fillet and nugget. Total unsaturated FA in …

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Crustal Fissuring On The Crest Of The Southern East Pacific Rise At 17˚15'-40'S, Dawn J. Wright, Rachel M. Haymon, Scott M. White, Ken C. Macdonald Jan 2002

Crustal Fissuring On The Crest Of The Southern East Pacific Rise At 17˚15'-40'S, Dawn J. Wright, Rachel M. Haymon, Scott M. White, Ken C. Macdonald

Faculty Publications

Fissure densities and widths have been mapped along the axial zone of the superfast spreading southern East Pacific Rise (EPR) at 17_150–400S with the near-bottom DSL-120 and Argo II imaging systems. We observe that the youngest lava flows (on a relative age scale) are sparsely fissured and that there is a cumulative increase in fissure abundance with time that produces a strong positive correlation between fissure density and relative age of lava flows. Average fissure widths were used to estimate fissure depths. In the 17_150–400S area, calculated fissure depths are estimated to extend below the seismic layer 2A/2B boundary, and …

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Promoting Effective Ethical Infrastructure In Large Law Firms: A Call For Research And Reporting, Elizabeth Chambliss, David B. Wilkins Jan 2002

Promoting Effective Ethical Infrastructure In Large Law Firms: A Call For Research And Reporting, Elizabeth Chambliss, David B. Wilkins

Faculty Publications

No abstract provided.

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Trusted Autonomy, Michael N. Huhns, Duncan A. Buell Jan 2002

Trusted Autonomy, Michael N. Huhns, Duncan A. Buell

Faculty Publications

We describe how agents are the right building blocks for constructing trustworthy systems. Robust software and trusted autonomy represent the future for agent technology and software engineering.

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Robust Software, Michael N. Huhns, Vance T. Holderfield Jan 2002

Robust Software, Michael N. Huhns, Vance T. Holderfield

Faculty Publications

Agents offer a convenient level of granularity at which to add redundancy a key factor in developing robust software. Blindly adding code introduces more errors, makes the system more complex, and renders it harder to understand. However, adding more code can make software better, if it is added in the right way. As this article describes, the key concepts appear to be redundancy and the appropriate granularity.

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Bringing Online Learning To Campus: The Hybridization Of Teaching And Learning At Brigham Young University, Gregory L. Waddoups, Scott L. Howell Jan 2002

Bringing Online Learning To Campus: The Hybridization Of Teaching And Learning At Brigham Young University, Gregory L. Waddoups, Scott L. Howell

Faculty Publications

The primary purpose of Brigham Young University (BYU) is to provide students with a combination of sacred and secular education often described as the BYU experience. Achieving this purpose is challenged by the rapid growth in Church membership and an enrollment cap of 30,000 students. To address these challenges, BYU sponsors the use of technology to bridge the gap between the increased Church membership and the number of students allowed under the enrollment caps. This institutional case study shows how these challenges have influenced the hybridization of teaching and learning for on campus (resident) and off campus (distance) students. It …

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Parental Psychological Control: Implications For Childhood Physical And Relational Aggression, David A. Nelson, Nicki R. Crick Jan 2002

Parental Psychological Control: Implications For Childhood Physical And Relational Aggression, David A. Nelson, Nicki R. Crick

Faculty Publications

Children who experience difficulties with peers also tend to experience both concurrent social–psychological difficulties and long-term negative developmental outcomes. Specifically, a significant amount of research has identified peer rejection and isolation as significant precursors to academic troubles and socially deviant behavior (DeRosier, Kupersmidt, & Patterson, 1994; Kupersmidt, Coie, & Dodge, 1990; Parker & Asher, 1987; Parker, Rubin, Price, & DeRosier, 1995). Substantial research and intervention efforts have consequently been dedicated to an understanding of the problem behaviors commonly identified as correlates or antecedents of peer rejection. Childhood aggression is one of the most significant predictors of peer rejection, and has …

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Judicial Review And Global Federalism, Charles H. Koch Jr. Jan 2002

Judicial Review And Global Federalism, Charles H. Koch Jr.

Faculty Publications

No abstract provided.

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On Revolution And Wetland Regulations, Michael J. Gerhardt Jan 2002

On Revolution And Wetland Regulations, Michael J. Gerhardt

Faculty Publications

No abstract provided.

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The Myths And Truths That Ended The 2000 Tmdl Program, Linda A. Malone Jan 2002

The Myths And Truths That Ended The 2000 Tmdl Program, Linda A. Malone

Faculty Publications

No abstract provided.

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Disease Management And Liability In The Human Genome Era, Larry I. Palmer Jan 2002

Disease Management And Liability In The Human Genome Era, Larry I. Palmer

Faculty Publications

No abstract provided.

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Disability, Employment Policy, And The Supreme Court, Michael Ashley Stein Jan 2002

Disability, Employment Policy, And The Supreme Court, Michael Ashley Stein

Faculty Publications

No abstract provided.

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Perceived Internal Depth In Rotating And Translating Objects, M. L. Braunstein, C. W. Sauer, Cary S. Feria, G. J. Andersen Jan 2002

Perceived Internal Depth In Rotating And Translating Objects, M. L. Braunstein, C. W. Sauer, Cary S. Feria, G. J. Andersen

Faculty Publications

Previous research has indicated that observers use differences between velocities and ratios of velocities to judge the depth within a moving object, although depth cannot in general be determined from these quantities. In four experiments we examined the relative effects of velocity difference and velocity ratio on judged depth within a transparent object that was rotating about a vertical axis and translating horizontally, examined the effects of the velocity difference for pure rotations and pure translations, and examined the effect of the velocity difference for objects that varied in simulated internal depth. Both the velocity difference and the velocity ratio …

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An Equity Paradigm For Preventing Genetic Discrimination, Anita Silvers, Michael Ashley Stein Jan 2002

An Equity Paradigm For Preventing Genetic Discrimination, Anita Silvers, Michael Ashley Stein

Faculty Publications

No abstract provided.

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Is There Such A Thing As "Christian" Sex?, John M. Berecz Jan 2002

Is There Such A Thing As "Christian" Sex?, John M. Berecz

Faculty Publications

It is challenging for Christian pastors and counselors to discuss human sexuality in ways which do not alienate liberals on the left, conservatives on the right, or biologists in the middle. Feminists frequently see males as dominating or insensitive, and conservative Christians sometimes feed into this by emphasizing patriarchal models of marriage as if this were the biblical paradigm for all time. Evolutionary biologists view sexuality primarily as a means of propagating the species. Into this cacophony of strident voices the Christian seeks to inject a calm but clear message: Christian sexuality is primarily a search for intimacy. In a …

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Foreword: The Promise And Peril Of Biotechnology, Joan H. Krause Jan 2002

Foreword: The Promise And Peril Of Biotechnology, Joan H. Krause

Faculty Publications

No abstract provided.

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Can Uptake Length In Strams Be Determined By Nutrient Addition Experiments? Results From An Interbiome Comparison Study, Patrick J. Mulholland, Jennifer L. Tanks, Jackson R. Webster, William B. Bowden, Walter K. Dodds, Stanley V. Gregory, Nancy B. Grimm, J. L. Meriam, Judy L. Meyer, Bruce J. Peterson, H. Maurice Valett, Wilfred M. Wollheim Jan 2002

Can Uptake Length In Strams Be Determined By Nutrient Addition Experiments? Results From An Interbiome Comparison Study, Patrick J. Mulholland, Jennifer L. Tanks, Jackson R. Webster, William B. Bowden, Walter K. Dodds, Stanley V. Gregory, Nancy B. Grimm, J. L. Meriam, Judy L. Meyer, Bruce J. Peterson, H. Maurice Valett, Wilfred M. Wollheim

Faculty Publications

Nutrient uptake length is an important parnmeter tor quantifying nutrient cycling in streams. Although nutrient tracer additions are the preierred method for measuring uptake length under ambient nutrient concentrations, short-term nutrient addition experiments have more irequently been used to estimate uptake length in streams. Theoretical analysis of the relationship between uptake length determined by nutrient addition experiments (Sw') and uptake length determined by tracer additions (Sw)predicted that Sw' should be consistently longer than 5,", and that the overestimate of uptake length by Sw( should be related to the level of nutrient addition above ambient concentrations and the degree of nutrient …

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Spatial Patterns Of Morphological Diversity Across The Indo-Pacific: Analyses Using Strombid Gastropods, Kaustuv Roy, Deborah P. Balch, Michael E. Hellberg Dec 2001

Spatial Patterns Of Morphological Diversity Across The Indo-Pacific: Analyses Using Strombid Gastropods, Kaustuv Roy, Deborah P. Balch, Michael E. Hellberg

Faculty Publications

Biological diversity can be measured using various metrics, but existing knowledge of spatial patterns of diversity is largely based on species counts. There is increasing evidence that trends in species richness might not match trends in other biodiversity metrics, such as morphological diversity. Here, we use data from a large group of Indo-Pacific gastropods (family Strombidae) to show that the species richness of a region is a poor predictor of the morphological diversity present there. Areas with only a few species can harbour an impressive array of morphologies and, conversely, morphological diversity in the most species-rich regions is no higher …

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Manipulation Of Prenatal Hormones And Dietary Phytoestrogens During Adulthood Alter The Sexually Dimorphic Expression Of Visual Spatial Memory, Edwin D. Lephart, Trent D. Lund Dec 2001

Manipulation Of Prenatal Hormones And Dietary Phytoestrogens During Adulthood Alter The Sexually Dimorphic Expression Of Visual Spatial Memory, Edwin D. Lephart, Trent D. Lund

Faculty Publications

In learning and memory tasks, requiring visual spatial memory (VSM), males exhibit higher performance levels compared to females (a difference attributed to sex steroid hormonal influences). Based upon the results from our companion investigation, this study examined the influence of prenatal sex steroid hormone manipulations on VSM in adulthood, as assessed in the radial arm maze. Additionally, the influence of dietary soy phytoestrogens (i.e., the presence of high or low estrogen-like compounds present in the animal's diet) on VSM was examined in combination with the prenatal hormonal manipulations. Results: Radial arm maze performance on a phytoestrogen-rich diet: 1) females treated …

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Visual Spatial Memory Is Enhanced In Female Rats (But Inhibited In Males) By Dietary Soy Phytoestrogens, Edwin D. Lephart, Trent D. Lund, Timothy W. West, Lilyan Y. Tian, Lihong H. Bu, Daniel L. Simmons, Kenneth Setchell, Herman Adlercreutz Dec 2001

Visual Spatial Memory Is Enhanced In Female Rats (But Inhibited In Males) By Dietary Soy Phytoestrogens, Edwin D. Lephart, Trent D. Lund, Timothy W. West, Lilyan Y. Tian, Lihong H. Bu, Daniel L. Simmons, Kenneth Setchell, Herman Adlercreutz

Faculty Publications

In learning and memory tasks, requiring visual spatial memory (VSM), males exhibit superior performance to females (a difference attributed to the hormonal influence of estrogen). This study examined the influence of phytoestrogens (estrogen-like plant compounds) on VSM, utilizing radial arm-maze methods to examine varying aspects of memory. Additionally, brain phytoestrogen, calbindin (CALB), and cyclooxygenase-2 (COX-2) levels were determined. Results: Female rats receiving lifelong exposure to a high-phytoestrogen containing diet (Phyto-600) acquired the maze faster than females fed a phytoestrogen-free diet (Phyto-free); in males the opposite diet effect was identified. In a separate experiment, at 80 days-of-age, animals fed the Phyto-600 …

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Microscale Patchiness Of Bacterioplankton Assemblage Richness In Seawater, Richard A. Long, Farooq Azam Dec 2001

Microscale Patchiness Of Bacterioplankton Assemblage Richness In Seawater, Richard A. Long, Farooq Azam

Faculty Publications

We sought to test the hypothesis that bacterial species richness and composition vary at the millimeter scale in the marine pelagic environment, in response to the heterogeneous distribution of organic matter. To test this hypothesis, it was necessary to design and test a protocol to sample, lyse and analyze (by polymerase chain reaction/denaturing gradient gel electrophoresis [PCR-DGGE]) bacterioplankton species richness in a single microliter of seawater. Significant variation in bacterial species richness was found amongst 1 μl samples. Greater species richness was seen when seawater was enriched with diatom detritus. Examination of species richness at 2 mm intervals over a …

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Three Unique Coordination Geometries Involving 1,2-Dimethoxy-4,5-Bis(2-Pyridylethynyl)Benzene, Jeffrey E. Fiscus, Sandra Shotwell, Ralph C. Layland, Mark D. Smith, Hans Conrad Zur Loye, Uwe H. F. Bunz Dec 2001

Three Unique Coordination Geometries Involving 1,2-Dimethoxy-4,5-Bis(2-Pyridylethynyl)Benzene, Jeffrey E. Fiscus, Sandra Shotwell, Ralph C. Layland, Mark D. Smith, Hans Conrad Zur Loye, Uwe H. F. Bunz

Faculty Publications

Reaction of the new ligand 1,2-dimethoxy-4,5-bis(2-pyridylethynyl) benzene with different metal centers under similar reaction conditions led to three distinct structure formation processes: molecular ring closure, dimerization, and polymer formation.

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Accumulation Of A Polyisoprene-Linked Amino Sugar In Polymyxin-Resistant Salmonella Typhimurium And Escherichia Coli: Structural Characterization And Transfer To Lipid A In The Periplasm, M. Stephen Trent, Anthony A. Ribeiro, William T. Doerrler, Shanhua Lin, Robert J. Cotter, Christian R.H. Raetz Nov 2001

Accumulation Of A Polyisoprene-Linked Amino Sugar In Polymyxin-Resistant Salmonella Typhimurium And Escherichia Coli: Structural Characterization And Transfer To Lipid A In The Periplasm, M. Stephen Trent, Anthony A. Ribeiro, William T. Doerrler, Shanhua Lin, Robert J. Cotter, Christian R.H. Raetz

Faculty Publications

Polymyxin-resistant mutants of Escherichia coli and Salmonella typhimurium accumulate a novel minor lipid that can donate 4-amino-4-deoxy-L-arabinose units (L-Ara4N) to lipid A. We now report the purification of this lipid from a pss- pmrAC mutant of E. coli and assign its structure as undecaprenyl phosphate-α-L-Ara4N. Approximately 0.2 mg of homogeneous material was isolated from an 8-liter culture by solvent extraction, followed by chromatography on DEAE-cellulose, C18 reverse phase resin, and silicic acid. Matrix-assisted laser desorption ionization/time of flight mass spectrometry in the negative mode yielded a single species [M - H]- at m/z 977.5, consistent with undecaprenyl phosphate-α-L-Ara4N (Mr = …

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Host-Switching Does Not Circumvent The Ni-Based Defence Of The Ni Hyperaccumulator Streptanthus Polygaloides (Brassicaceae), Micheal A. Davis, Robert S. Boyd, James H. Cane Nov 2001

Host-Switching Does Not Circumvent The Ni-Based Defence Of The Ni Hyperaccumulator Streptanthus Polygaloides (Brassicaceae), Micheal A. Davis, Robert S. Boyd, James H. Cane

Faculty Publications

Elevated tissue concentrations of metals have been shown to defend metal-hyperaccumulating plants against both herbivores and pathogens. Tolerance of metal-based defences presents a challenge to herbivores, because heavy metals cannot be degraded or metabolized. One strategy that herbivores can employ to counter high-metal defences is dietary dilution, or host switching. Highly mobile herbivores are most likely to use this strategy, but less mobile lepidopteran larvae can also Improve their performance on toxic hosts if early instar development occurs on more favourable hosts. We examined the effects of host switching on growth and survival of a generalist folivore. Specifically, we tested …

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Modeling The Effects Of Transforming Growth Factor-Beta On Extracellular Matrix Alignment In Dermal Wound Repair, J. C. Dallon, J. A. Sherratt, P. K. Maini Oct 2001

Modeling The Effects Of Transforming Growth Factor-Beta On Extracellular Matrix Alignment In Dermal Wound Repair, J. C. Dallon, J. A. Sherratt, P. K. Maini

Faculty Publications

We present a novel mathematical model for collagen deposition and alignment during dermal wound healing, focusing on the regulatory effects of TGF. Our work extends a previously developed model which considers the interactions between fibroblasts and extracellular matrix, composed of collagen and a fibrin based blood clot, by allowing fibroblasts to orient the collagen matrix, and produce and degrade the extracellular matrix, while the matrix can direct the fibroblasts and control their speed. Here we extend the model by allowing a time varying concentration of TGF to alter the properties of the fibroblasts. Thus we are able to simulate experiments …

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Chromosomal Inversions And The Reproductive Isolation Of Species, M. A.F. Noor, K. L. Gratos, L. A. Bertucci, J. Reiland Oct 2001

Chromosomal Inversions And The Reproductive Isolation Of Species, M. A.F. Noor, K. L. Gratos, L. A. Bertucci, J. Reiland

Faculty Publications

Recent genetic studies have suggested that many genes contribute to differences between closely related species that prevent gene exchange, particularly hybrid male sterility and female species preferences. We have examined the genetic basis of hybrid sterility and female species preferences in Drosophila pseudoobscura and Drosophila persimilis, two occasionally hybridizing North American species. Contrary to findings in other species groups, very few regions of the genome were associated with these characters, and these regions are associated also with fixed arrangement differences (inversions) between these species. From our results, we propose a preliminary genic model whereby inversions may contribute to the speciation …

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Disability, Equal Protection, And The Supreme Court: Standing At The Crossroads Of Progressive And Retrogressive Logic In Constitutional Classification, Anita Silvers, Michael Ashley Stein Oct 2001

Disability, Equal Protection, And The Supreme Court: Standing At The Crossroads Of Progressive And Retrogressive Logic In Constitutional Classification, Anita Silvers, Michael Ashley Stein

Faculty Publications

This Article compares current disability jurisprudence with the development of sex equality jurisprudence in the area of discrimination. It demonstrates that current disability law resembles the abandoned, sexist framework for determining sex equality and argues that disability equality cases should receive similar analysis as the more progressive, current sex equality standard. As such, the Article attempts to synthesize case law (l4th Amendment Equal Protection jurisprudence) and statutory law (Title VII and the ADA) into a comprehensive overview of the state of current disability law viewed within the context of discrimination law in general.

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Pfiesteria: Review Of The Science And Identification Of Research Gaps. Report For The National Center For Environmental Health, Centers For Disease Control And Prevention, Jonathan Samet, Gary S. Bignami, Robert Feldman, William E. Hawkins, Jerry Neff, Theodore Smayda Oct 2001

Pfiesteria: Review Of The Science And Identification Of Research Gaps. Report For The National Center For Environmental Health, Centers For Disease Control And Prevention, Jonathan Samet, Gary S. Bignami, Robert Feldman, William E. Hawkins, Jerry Neff, Theodore Smayda

Faculty Publications

In connection with the CDC National Conference on Pfiesteria, a multidisciplinary panel evaluated Pfiesteria-related research. The panel set out what was known and what was not known about adverse effects of the organism on estuarine ecology, fish, and human, health; assessed the methods used in Pfiesteria research; and offered suggestions to address data gaps. The panel's expertise covered dinoflagellate ecology; fish pathology and toxicology; laboratory measurement of toxins, epidemiology, and neurology. The panel evaluated peer-reviewed and non-peer-reviewed literature available through June 2000 in a systematic conceptual framework that moved from the source of exposure, through exposure research and dose, to …

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Effects Of River Inputs Into The Bay Of Bengal, Stephan D. Howden, Raghu Murtugudde Sep 2001

Effects Of River Inputs Into The Bay Of Bengal, Stephan D. Howden, Raghu Murtugudde

Faculty Publications

The effect of river runoff in the Bay of Bengal is examined using a reduced gravity primitive equation ocean model coupled to an atmospheric boundary layer model. Model simulations are carried out by including river discharges as surface freshwater forcing at the mouths of the rivers. To assess the effect of river inputs on the dynamics and thermodynamics of the tropical Indian Ocean, parallel simulations are carried out by neglecting the river inputs. Additionally, another set of parallel runs without penetrative radiation loss through the mixed layer is carried out. The freshwater flux due to rivers results in lower salinities …

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L-Cysteine-Mediated Destabilization Of Dinitrosyl Iron Complexes In Proteins, Paul A. Rogers, Huangen Ding Aug 2001

L-Cysteine-Mediated Destabilization Of Dinitrosyl Iron Complexes In Proteins, Paul A. Rogers, Huangen Ding

Faculty Publications

Nitric oxide is a signaling molecule in intercellular communication as well as a powerful weapon used by macrophages to kill tumor cells and pathogenic bacteria. Here, we show that when Escherichia coli cells are exposed to nitric oxide, its ferredoxin [2Fe-2S] cluster is nitrosylated, forming the dinitrosyl iron complex with a characteristic EPR signal at gav = 2.04. Such formed ferredoxin dinitrosyl iron complex is efficiently repaired in E. coli cells even in the absence of new protein synthesis. However, the repair activity is completely inactivated once E. coli cells are disrupted, indicating that repairing the ferredoxin dinitrosyl iron complex …

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