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Transgenic Dairy Cattle: Genetic Engineering On A Large Scale, R. J. Wall, D. E. Kerr, K. R. Bondioli Jan 1997

Transgenic Dairy Cattle: Genetic Engineering On A Large Scale, R. J. Wall, D. E. Kerr, K. R. Bondioli

Faculty Publications

Amid the explosion of fundamental knowledge generated from transgenic animal models, a small group of scientists has been producing transgenic livestock with goals of improving animal production efficiency and generating new products. The ability to modify mammary-specific genes provides an opportunity to pursue several distinctly different avenues of research. The objective of the emerging gene "pharming" industry is to produce pharmaceuticals for treat-ing human diseases. It is argued that mammary glands are an ideal site for producing complex bioactive proteins that can be cost effectively harvested and purified. Consequently, during the past decade, approximately a dozen companies have been created …

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Modeling Human Evolution - To Tree Or Not To Tree?, Stephen T. Sherry, Mark A. Batzer Jan 1997

Modeling Human Evolution - To Tree Or Not To Tree?, Stephen T. Sherry, Mark A. Batzer

Faculty Publications

No abstract provided.

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Alu Insertion Polymorphisms And Human Evolution: Evidence For A Larger Population Size In Africa, Mark Stoneking, Jennifer J. Fontius, Stephanie L. Clifford, Himla Soodyall, Santosh S. Arcot, Nilmani Saha, Trefor Jenkins, Mohammad A. Tahir, Prescott L. Deininger, Mark A. Batzer Jan 1997

Alu Insertion Polymorphisms And Human Evolution: Evidence For A Larger Population Size In Africa, Mark Stoneking, Jennifer J. Fontius, Stephanie L. Clifford, Himla Soodyall, Santosh S. Arcot, Nilmani Saha, Trefor Jenkins, Mohammad A. Tahir, Prescott L. Deininger, Mark A. Batzer

Faculty Publications

Alu insertion polymorphisms (polymorphisms consisting of the presence/absence of an Alu element at a particular chromosomal location) offer several advantages over other nuclear DNA polymorphisms for human evolution studies. First, they are typed by rapid, simple, PCR-based assays; second, they are stable polymorphisms-newly inserted Alu elements rarely undergo deletion; third, the presence of an Alu element represents identity by descent-the probability that different Alu elements would independently insert into the exact same chromosomal location is negligible; and fourth, the ancestral state is known with certainty to be the absence of an Alu element. We report here a study of 8 …

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Phytochrome Gene Diversity, S. Mathews, R. A. Sharrock Jan 1997

Phytochrome Gene Diversity, S. Mathews, R. A. Sharrock

Faculty Publications

The structures and functions of the phytochrome apoprotein genes (the PHY genes), their diversity across the plant kingdom, and their evolution are central concerns in the study of red-light sensing in plants. We summarize here recent advances in two areas relating to these topics: (1) the characteristics of the PHY gene family in Arabidopsis thaliana, the higher plant species for which the most extensive information on these genes is available, and (2) the similarity relationships, phylogeny, and evolutionary implications of PHY gene sequences and partial sequences which have been described from various plants. Together, these two areas of study, one …

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Information Capacity Of The Carbohydrate Code, Roger A. Laine Jan 1997

Information Capacity Of The Carbohydrate Code, Roger A. Laine

Faculty Publications

Capacity for information in biological molecules is traditionally thought to reside in the primary sequence of proteins and RNA, recorded in the DNA. With the exception of some RNA molecules, proteins, if not structural, carry their information in binding sites for substrates of reactions, or in binding sites for control molecules. Some proteins bind to complex carbohydrates in a carbohydrate-specific fashion, including enzymes, lectins and antibodies. These carbohydrates, assembled by sequential glycosyl transferases, also carry biological information, the other side of which is a binding protein that recognizes a specific sugar monosaccharides, sequence, anomerity, linkage, ring size, branching and substitution. …

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Regulation Of Root-Associated Methanotrophy By Oxygen Availability In The Rhizosphere Of Two Aquatic Macrophytes, Aram Calhoun, Gary M. King Jan 1997

Regulation Of Root-Associated Methanotrophy By Oxygen Availability In The Rhizosphere Of Two Aquatic Macrophytes, Aram Calhoun, Gary M. King

Faculty Publications

The relative importance of oxygen for root-associated methanotrophy was examined by using sediment-free, intact freshwater marsh plants (Pontederia cordata and Sparganium eurycarpum) incubated in split chambers. The root medium contained approximately 100 μM methane. Methane oxidation was calculated from the difference between methane loss from chambers in the presence and absence of 1 mM 1-allyl-2-thiourea, a methanotrophic inhibitor. When the root medium was oxic, methane oxidation accounted for 88 and 63% of the total methane depletion for S. eurycarpum and P. cordata, respectively; the remainder represented diffusional loss to the atmosphere via roots, stems, and leaves. Under suboxic conditions, methane …

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The Prevalence Of Hypertension In Seven Populations Of West African Origin, Richard Cooper, Charles Rotimi, Susan Ataman, Daniel Mcgee, Babatunde Osotimehin, Solomon Kadiri, Walinjom Muna, Samuel Kingue, Henry Fraser, Terrence Forrester, Franklyn Bennett, Rainford Wilks Jan 1997

The Prevalence Of Hypertension In Seven Populations Of West African Origin, Richard Cooper, Charles Rotimi, Susan Ataman, Daniel Mcgee, Babatunde Osotimehin, Solomon Kadiri, Walinjom Muna, Samuel Kingue, Henry Fraser, Terrence Forrester, Franklyn Bennett, Rainford Wilks

Faculty Publications

Objectives. This study was undertaken to describe the distribution of blood pressures, hypertension prevalence, and associated risk factors among seven populations of West African origin. Methods. The rates of hypertension in West Africa (Nigeria and Cameroon), the Caribbean (Jamaica, St. Lucia, Barbados), and the United States (metropolitan Chicago, Illinois) were compared on the basis of a highly standardized collaborative protocol. After researchers were given central training in survey methods, population-based samples of 800 to 2500 adults over the age of 25 were examined in seven sites, yielding a total sample of 10 014. Results. A consistent gradient of hypertension prevalence …

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Residents’ Satisfaction With Nursing Homes, Hanna Pearce Plauche Jan 1997

Residents’ Satisfaction With Nursing Homes, Hanna Pearce Plauche

Honors Capstones

No abstract provided.

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Lsu General Catalog 1997-1998, Louisiana State University And Agricultural And Mechanical College Jan 1997

Lsu General Catalog 1997-1998, Louisiana State University And Agricultural And Mechanical College

LSU General Catalog

The LSU General Catalog describes all undergraduate and graduate departments and programs with degree requirements and courses offered for each one. The General Catalog includes information on registration and financial aid as well as academic services offered to all students.

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Three-Species Monomer-Monomer Model: A Mean-Field Analysis And Monte Carlo Study, Kevin E. Bassler, Dana A. Browne Jan 1997

Three-Species Monomer-Monomer Model: A Mean-Field Analysis And Monte Carlo Study, Kevin E. Bassler, Dana A. Browne

Faculty Publications

We study the phase diagram and critical behavior of a one-dimensional three-species monomer-monomer catalytic surface reaction model. Static Monte Carlo simulations are used to roughly map out the phase diagram consisting of a reactive steady state bordered by three equivalent unreactive phases where the surface is saturated with one monomer species. The transitions from the reactive phase are all continuous, while the transitions between poisoned phases are first order. Of particular interest are the bicritical points where the reactive phase simultaneously meets two poisoned phases. A mean-field cluster analysis fails to predict all of the qualitative features of the phase …

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Mean-Field Analysis And Monte Carlo Study Of An Interacting Two-Species Reaction Model, K. S. Brown, K. E. Bassler, D. A. Browne Jan 1997

Mean-Field Analysis And Monte Carlo Study Of An Interacting Two-Species Reaction Model, K. S. Brown, K. E. Bassler, D. A. Browne

Faculty Publications

We study the phase diagram and critical behavior of an interacting one-dimensional two-species monomer-monomer catalytic surface reaction model with a reactive phase as well as two equivalent adsorbing phases where one of the species saturates the system. The model depends on two parameters: the relative adsorption rates of the two species and a repulsive interaction between like neighbors. A mean-field analysis including correlations up to triplets of sites fails to reproduce the phase diagram found by Monte Carlo simulations. The three phases coexist at a bicritical point whose critical behavior is described by the even branching annihilating random-walk universality class. …

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Variability Of A Vestigial Structure: First Metacarpal In Colobus Guereza And Ateles Geoffroyi, Robert G. Tague Jan 1997

Variability Of A Vestigial Structure: First Metacarpal In Colobus Guereza And Ateles Geoffroyi, Robert G. Tague

Faculty Publications

A tenet of evolutionary theory is that, under conditions of stabilizing selection, phenotypic variability is inversely related to selection intensity. Correspondingly, a nonfunctional, vestigial structure is expected to be highly variable relative to its functional homologue. This study tests the hypothesis that species with a vestigial pollex, Colobus guereza and Ateles geoffroyi, have a first metacarpal whose length is both highly variable relative to, and poorly correlated with, the lengths of the other metapodials. The results are consistent with the hypothesis, though this combination of traits is also found in Presbytis rubicunda and Presbytis cristata. The latter two species have …

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Effects Of Environmental Sodium Chloride On Percent Hatch, Yolk Utilization, And Survival Of Channel Catfish Fry, C. R. Weirich, T. R. Tiersch Jan 1997

Effects Of Environmental Sodium Chloride On Percent Hatch, Yolk Utilization, And Survival Of Channel Catfish Fry, C. R. Weirich, T. R. Tiersch

Faculty Publications

Only limited research has addressed the effect of salinity on hatching of channel catfish Ictalurus punctatus eggs, and no studies have evaluated the effect of salinity on fry development and survival. This study was undertaken to determine the effect of environmental sodium chloride (0, 1, 2, and 4 g/L NaCl) on percent hatch, yolk utilization, and survival of channel catfish fry. Experiments were conducted in recirculating systems using seven egg masses (1-2 d old). Each egg mass was divided into smaller portions which remained undissociated or were dissociated with sodium sulfite (NaSO3). Eggs were incubated until hatching. Wet and dry …

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Roosting Behavior And Group Territoriality In American Crows, Donald F. Caccamise, Lisa M. Reed, Jerzy Romanowski, Philip C. Stouffer Jan 1997

Roosting Behavior And Group Territoriality In American Crows, Donald F. Caccamise, Lisa M. Reed, Jerzy Romanowski, Philip C. Stouffer

Faculty Publications

Cooperative groups of American Crows (Corvus brachyrhynchos) maintain group territories year-round while often traveling long distances to roost communally at night. Our goal was to discover how territorial crows resolve the conflict between the cohesive nature of group behavior with requirements of dispersal to roost communally. We color-marked crows to study group composition over two years, and radio-tagged crows to study movement among roosts, territories, and feeding areas. Most crows showed diurnal fidelity to the group territory throughout the year. Yet, most birds frequently left territories during the day to forage up to 4 km away. At night, crows roosted …

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Interspecific Aggression In Formicarius Antthrushes? The View From Central Amazonian Brazil, P. C. Stouffer Jan 1997

Interspecific Aggression In Formicarius Antthrushes? The View From Central Amazonian Brazil, P. C. Stouffer

Faculty Publications

No abstract provided.

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Removal Of Hydrophobic Organic Compounds And Surfactants From Wastewater: Polyaphron-Enhanced Solvent Extraction And Biodegradation., Chunlong Zhang Jan 1997

Removal Of Hydrophobic Organic Compounds And Surfactants From Wastewater: Polyaphron-Enhanced Solvent Extraction And Biodegradation., Chunlong Zhang

LSU Historical Dissertations and Theses

Surfactant based processes are emerging and becoming increasingly important in pollution control. A novel predispersed solvent extraction (PDSE) technique using surfactant based colloidal liquid aphrons (CLAs or polyaphrons) and colloidal gas aphrons (CGAs) for the removal of hydrophobic organic compounds (HOCs) from the aqueous phase was studied. The process involves an extraction of HOCs into CLAs, followed by a flotation using CGAs. Polyaphrons were characterized by a particle size analyzer. The size distribution was found to be bimodal. The effects of surfactant types, surfactant concentrations and storage times on the size distribution were studied. Polyaphrons have long shelf-lives and are …

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A Computer Automated, Hydraulically Integrated Serial Turbidostat Algal Reactor (Histar): Mathematical Modeling And Experimental Analysis., Chandra Sekhar Theegala Jan 1997

A Computer Automated, Hydraulically Integrated Serial Turbidostat Algal Reactor (Histar): Mathematical Modeling And Experimental Analysis., Chandra Sekhar Theegala

LSU Historical Dissertations and Theses

Conceptually, the Hydraulically Integrated Serial Turbidostat Algal Reactor (HISTAR) has two components: (1) sealed turbidostats for producing a high quality algal inoculum, and (2) a series of unprotected inter-connected continuous flow stirred tank reactors (CFSTRs) for mass producing algae under approximated plug flow conditions. The hydraulic retention time of each individual CFSTR ($\theta\sb{\rm n})$ is set low enough (dilution is set high) that any suspended organisms (both contaminants and desired algae) entering the CFSTR would be washed to the next CFSTR well within their doubling time. However, as the turbidostats are employed to inoculate the first CFSTR on an almost …

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Technical Change And New Directions For Cotton Production, Richard F. Kazmierczak Jan 1997

Technical Change And New Directions For Cotton Production, Richard F. Kazmierczak

LSU Agricultural Experiment Station Reports

No abstract provided.

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Gumbo Yearbook, Class Of 1997, Louisiana State University And Agricultural And Mechanical College Jan 1997

Gumbo Yearbook, Class Of 1997, Louisiana State University And Agricultural And Mechanical College

Gumbo Yearbook

The Gumbo yearbook chronicles the entire academic year at LSU. In words and especially photos, the Gumbo shows the people, places, and events that make each year unique. In addition to formal portraits of schools and departments, the book contains hundreds of snapshots of students with their friends and dozens of pages showcasing organizations.

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Non-Conservative Behavior Of Select Naturally-Occurring Radionuclides And Metals In Coastal Waters., Peter Wolfgang Swarzenski Jan 1997

Non-Conservative Behavior Of Select Naturally-Occurring Radionuclides And Metals In Coastal Waters., Peter Wolfgang Swarzenski

LSU Historical Dissertations and Theses

Water column samples from three vastly contrasting coastal regimes (Framvaren Fjord, Norway, the Amazon and Mississippi River outflow regions) were analyzed to study the estuarine transport and scavenging processes of $\sp{210}$Pb, $\sp{210}$Po, $\sp{234}$U and $\sp{238}$U. The Amazon and Mississippi River outflow regions are two of the world's largest river-ocean mixing systems that contrast each other sharply in many physiographical and geochemical features. The Amazon is a tropical, high energy, shelf environment where estuarine physico-chemical processes are strongly influenced by sediment-water interactions. The Mississippi system on the other hand discharges much of its load close to the shelf-break where estuarine geochemical …

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Injection Of Species Under Electrical Field To Enhance Bioremediation., Fazle Rabbi Jan 1997

Injection Of Species Under Electrical Field To Enhance Bioremediation., Fazle Rabbi

LSU Historical Dissertations and Theses

Electrokinetics is one of the most viable alternatives for injecting/extracting water, organic and ionic species in low permeability soils as well as heterogeneous media because the transport processes are independent of the pore sizes. A better understanding of the principles offers the opportunity to employ multi-component species transport under electrical fields to inject electron acceptors, nutrients and other process additives for enhancement of in-situ bioremediation in low permeability and heterogeneous media. This study assesses the potential to employ and exploit the principles of multi-component species transport under electrical fields as mean to supplement, enhance and engineer in-situ bioremediation. It was …

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Coastal Restoration Using Pipeline-Conveyed Sediments., Catherine Faith Voisin Jan 1997

Coastal Restoration Using Pipeline-Conveyed Sediments., Catherine Faith Voisin

LSU Historical Dissertations and Theses

A spreadsheet program was successfully developed which determines the engineering requirements for pipeline transport of sediments from dredge sites to wetland restorations sites. The program called SLURRY.XLS involves several new correlations. A new correlation for determining the critical velocity of particle transport is presented. New correlations were statistically developed for determining the drag coefficient of particles. The spreadsheet also successfully determines settling velocities of the individual particle sizes in any settling regime. A second spreadsheet program entitled "CONSOL.XLS" uses geotechnical principles of consolidation for determining marsh surface elevation with and without hydraulic fill versus time. The CONSOL.XLS program permits the …

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The Effects Of Sleep Deprivation On Information Processing, New Learning, And Memory In Mildly Head-Injured Subjects With Post-Concussion Symptoms., Brian Betz Jan 1997

The Effects Of Sleep Deprivation On Information Processing, New Learning, And Memory In Mildly Head-Injured Subjects With Post-Concussion Symptoms., Brian Betz

LSU Historical Dissertations and Theses

Subjects who had sustained a mild head injury (MHI) and uninjured control subjects were examined before and after 36 hours of sleep deprivation. MHI subjects and uninjured controls were selected from among individuals who scored above the 50$\rm\sp{th}$ percentile on the Postconcussion Syndrome Checklist (PCSC), a measure designed to assess the frequency, intensity and duration of postconcussion symptoms. Sixty subjects were divided into four groups: Head injured/sleep deprived, head injured/non-sleep deprived, uninjured/sleep deprived, and uninjured/non-sleep deprived. Performance was compared among the groups on the Selective Reminding Test (SRT) and the Paced Auditory Serial Addition Test (PASAT), which are designed to …

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Everyday Problem-Solving Goals: Contributions Of Age And Individual Differences., Lisa Eileen Norris Jan 1997

Everyday Problem-Solving Goals: Contributions Of Age And Individual Differences., Lisa Eileen Norris

LSU Historical Dissertations and Theses

The purpose of the present research was to examine the contribution of age and individual differences to everyday problem solving, focusing on goal preference. Three pilot studies were conducted to generate interpersonal problem solving goals that were high in emotional arousal and low in emotional arousal. In the Experiment Proper, 40 young and 40 older adults were given 6 vignettes depicting everyday problems. Subjects rated their preference of both high and low experimenter-provided goals. Subjects then completed 4 individual difference questionnaires that measured stimulation intensity, affect intensity, and emotional control. Results showed that both younger and older adults endorsed more …

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Optimization And Scale-Up Of Thiarubrine A Production From Hairy Root Cultures Of Ambrosia Artemisiifolia., Santosh G. Bhagwath Jan 1997

Optimization And Scale-Up Of Thiarubrine A Production From Hairy Root Cultures Of Ambrosia Artemisiifolia., Santosh G. Bhagwath

LSU Historical Dissertations and Theses

Thiarubrine A (TA), a plant secondary metabolite synthesized by members of the family Asteraceae possesses antifungal and antiviral properties and is a potential pharmaceutical. The objective of the work was the optimization and scale-up of a bioprocess for the production of TA using hairy root cultures of Ambrosia artemisiifolia. At the inception of the work an established hairy root culture of the model system was used as inoculum in reactor experiments for the development of a protocol for the quantification of TA and in subsequent shake flask experiments to determine optimum culture conditions. TA accumulation closely paralleled growth and then …

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Experimental Analysis Of Aggression., Bethany Ann Marcus Jan 1997

Experimental Analysis Of Aggression., Bethany Ann Marcus

LSU Historical Dissertations and Theses

In 1982, Iwata, Dorsey, Slifer, Bauman, and Richman developed a systematic assessment method to identify the operant functions of self-injurious behavior. In this study, the Iwata et al., method was used to assess the operant functions of aggression displayed by children and adolescents with developmental disabilities. Although researchers have demonstrated that aggression serves operant functions, there has been no comprehensive analysis of aggression using the Iwata et al. method. Twelve children and adolescents participated. The experimental conditions from the Iwata et al. method were replicated (i.e., attention, instructional demand, play, no interaction); also, a tangible positive reinforcement condition was included …

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Seasonal Changes In Gnrh Neurons And Effects Of Dietary Monoamine Precursors On The Hypothalamic-Gonadal Axis In House Sparrows (Passer Domesticus)., Christopher Andrew Meseke Jan 1997

Seasonal Changes In Gnrh Neurons And Effects Of Dietary Monoamine Precursors On The Hypothalamic-Gonadal Axis In House Sparrows (Passer Domesticus)., Christopher Andrew Meseke

LSU Historical Dissertations and Theses

Mechanisms modulating avian seasonal reproduction involve a complex interaction between exogenous environmental information and internal physiologic systems, such as functional changes in the hypothalamic-gonadal axis and changes in the influence of monoaminergic neurotransmitters on hypothalamic neuroendocrine cells. This project was undertaken to describe seasonal changes of the testes and immunoreactive-(ir)-gonadotropin-releasing hormone (GnRH) neurons in House Sparrows in southeastern Louisiana, and to examine the role of monoaminergic neurotransmitters in modulating seasonal reproduction through the use of dietary monoamine precursors. Testicular weights rapidly increased from February to March, peaked from April to July, when the seminiferous tubules were spermatagenically active and filled …

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Structural Equation Modeling Analysis Of Etiological Factors In Social Anxiety., Michele E. Mccarthy Jan 1997

Structural Equation Modeling Analysis Of Etiological Factors In Social Anxiety., Michele E. Mccarthy

LSU Historical Dissertations and Theses

The current study investigated possible etiological risk factors in the development of social anxiety. The risk factors examined in this study were family environment, negative peer interactions, neuroticism, self-perceived attractiveness, public self-consciousness, social behavior goal/ability discrepancy, and fear of negative evaluation. These variables were hypothesized to have both direct and indirect influences on the development of social anxiety. A hypothesized risk factor model was tested employing structural equation modeling (SEM) using questionnaire data collected from 559 college undergraduates. Phases of this study included the refinement of constructs, examination of the internal consistency and discriminant validity of the constructs, examination of …

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The Third Way: A Study Of Economic Justice In The Writings Of Karol Wojtyla (Pope John Paul Ii)., Woodard King Mott Jr Jan 1997

The Third Way: A Study Of Economic Justice In The Writings Of Karol Wojtyla (Pope John Paul Ii)., Woodard King Mott Jr

LSU Historical Dissertations and Theses

Pope John Paul II, born Karol Wojtyla, has written extensively about the human person and how that person acts in the world. Beginning with Wojtyla's doctoral dissertation presented at the Pontifical University of St. Thomas Aquinas on the Catholic mystic St. John of the Cross and continuing through the most recent best seller, Crossing the Threshold of Hope, Christian personalism has pervaded Wojtyla's writings, encyclicals, and public utterances. Wojtyla's perspective on economic justice, as shaped by his Christian personalism, is the subject of this dissertation. A systematic investigation of Wojtyla's theory of economic justice reveals a third way of economic …

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Spectroscopic Analyses Of Excited-State Phenomena In Organized Media: Proton Transfer And Photoisomerization And Measurement Of Modified Low Density Lipoproteins Using Rapid-Mixing Multidimensional Stopped-Flow Spectroscopic Methods., Eric Lamar Butler-Roberts Jan 1997

Spectroscopic Analyses Of Excited-State Phenomena In Organized Media: Proton Transfer And Photoisomerization And Measurement Of Modified Low Density Lipoproteins Using Rapid-Mixing Multidimensional Stopped-Flow Spectroscopic Methods., Eric Lamar Butler-Roberts

LSU Historical Dissertations and Theses

The research presented in this dissertation generally involves aspects of molecular spectroscopy and contains two areas of focus. In the first section, the influences of organized media on the excited-state phenomena of intramolecular proton transfer (ESIPT) and photoisomerization have been investigated. Specifically, the photochemical properties of the novel ESIPT molecule 10-hydroxybenzo(h) quinoline (HBQ), as well as 2-(2$\sp\prime$-hydroxyphenyl)benzazoles (HBAs), have been examined in the presence of cyclodextrins (CDs) and micelles using absorbance, steady-state, and time-resolved emission spectroscopies. Additionally, the influence of cyclodextrins upon the photoisomerization of trans-stilbene (TS) has been studied. Results from spectroscopic studies of HBQ and HBAs in organized …

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