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Model Reduction Of Stochastic And Deterministic Continuous Time Linear Systems (Lypunov Equation, Schawrz Approximation)., Khier Benmahammed Jan 1986

Model Reduction Of Stochastic And Deterministic Continuous Time Linear Systems (Lypunov Equation, Schawrz Approximation)., Khier Benmahammed

LSU Historical Dissertations and Theses

Two new approaches for reducing the order of large scale continuous systems are presented. The first approach is a modified version of the aggregation technique. It uses the matching properties of the steady state output covariance and the Markov parameters of the high order system to those of the r('th) order model. This approach also uses a new algorithm derived for the computation of the controllability and observability Grammians, to produce controllable, observable and stable low order models. These is no unique method available for evaluating the aggregation matrix or the matrix relating the system state vector to the model …


Faculty Senate Resolution 85-03, Louisiana State University And Agricultural & Mechanical College Dec 1985

Faculty Senate Resolution 85-03, Louisiana State University And Agricultural & Mechanical College

LSU Faculty Senate Publications

Faculty Senate Resolution on the thirty-nine hour general education component, adopted on December 5, 1985.


An Analysis Of Mercury Accumulation Within The Upper Estuarine Food Chain Of Lake Charles, Louisiana, Jeffrey W. Tingle Nov 1985

An Analysis Of Mercury Accumulation Within The Upper Estuarine Food Chain Of Lake Charles, Louisiana, Jeffrey W. Tingle

LSU Historical Dissertations and Theses

Analysis of the level of mercury contamination within the sediments and fish associated food chain of Lake Charles, Louisiana, an area located within the Calcasieu River system, were assessed. Sediment levels were found to be slightly elevated (0.33µg Hg/g) from natural background levels (0.20 µg Hg/g). Levels found within the fish of the region were also found to be slightly elevated (0.287 µg Hg/g) from natural levels. This is below the hazardous level designated by the Food and Drug Administration (0.50 µg Hg/g). The statistical analysis of the pathway of mercury through a food chain composed of eight different species …


Louisiana Agriculture Magazine, Fall 1985, Lsu Agricultural Experiment Station Oct 1985

Louisiana Agriculture Magazine, Fall 1985, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.


Locus-Specific Detection Of Hla-Dq And -Dr Antigens By Antibodies Against Synthetic N-Terminal Octapeptides Of The Β Chain, Thomas Deufel, Anne Grove, Hans Kofod, Åke Lernmark Sep 1985

Locus-Specific Detection Of Hla-Dq And -Dr Antigens By Antibodies Against Synthetic N-Terminal Octapeptides Of The Β Chain, Thomas Deufel, Anne Grove, Hans Kofod, Åke Lernmark

Faculty Publications

Antibodies against synthetic peptides representing the class-II antigen HLA-DR and -DQ β chain N-terminal sequences were prepared in rabbits. The two octapeptides only share two amino acids and enzyme-linked immuno-assays showed the antisera only to bind to its own antigen. Both peptide antisera detected a 29 kDa component in immunoblots of Raji and AL-34 cell plasma membrane proteins separated by SDS gel electrophoresis. The binding of either N-terminal peptide antiserum was selectively inhibited only by the peptide used as antigen. Indirect immunofluorescence.analysis by flow cytofluorometry showed specific surface immunofluorescence in 1:100-1:1000 dilutions in lymphoblastoid and blood mononucleated cells. In the …


Percina Jenkinsi, A New Species Of Logperch (Pisces, Percidae) From The Conasauga River, Tennessee And Georgia, Bruce A. Thompson Jul 1985

Percina Jenkinsi, A New Species Of Logperch (Pisces, Percidae) From The Conasauga River, Tennessee And Georgia, Bruce A. Thompson

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.


The Azido[14C]Atrazine Photoaffinity Technique Labels A 34-Kda Protein In Scenedesmus Which Functions On The Oxidizing Side Of Photosystem Ii, James G. Metz, Terry M. Bricker, Michael Seibert Jun 1985

The Azido[14C]Atrazine Photoaffinity Technique Labels A 34-Kda Protein In Scenedesmus Which Functions On The Oxidizing Side Of Photosystem Ii, James G. Metz, Terry M. Bricker, Michael Seibert

Faculty Publications

We have used azido[14C]atrazine to photoaffinity label thylakoids from wild-type (WT) Scenedesmus and a mutant, LF-1, which is blocked on the oxidizing side of photosystem II (PS II). One protein is labeled in each case, at 34 kDa in the WT and 36 kDa in LF-1. Previous comparison of the WT with LF-1 had been used to assign a PS II donor side function to the 34-kDa protein. These results suggest that this photoaffinity technique does not label the herbicide-binding protein involved in electron transfer on the reducing side of PS II. © 1985.


Studies On The Molecular Cloning Of A Gene For Aryletherase From A Ligninolytic Erwinia Sp. (Lignin, Biodegradation, Bacterial)., Kenneth Edwin Narva Jan 1985

Studies On The Molecular Cloning Of A Gene For Aryletherase From A Ligninolytic Erwinia Sp. (Lignin, Biodegradation, Bacterial)., Kenneth Edwin Narva

LSU Historical Dissertations and Theses

Recombinant DNA techniques were utilized to clone a gene from the ligninolytic system of a saprophytic Erwinia sp. into Escherichia coli using pBR322 as a vector. The cloned gene encodes aryletherase activity and was selected from amp('r) tet('S) transformants of E. coli Cs412 using salicin as the selective carbon source. This compound has structural characteristics similar to some lignin model compounds. The cloned gene enclodes activity which oxidizes aromatic lignin model compounds resulting ultimately in the breakage of arylether bonds while leaving the aromatic nucleus intact. At least one lower molecular weight aromatic compound is also released from kraft lignin …


Allelochemicals From Soybean Affecting Pseudoplusia Includens (Walker) Biology And Pheromone From Chilo Plejadellus Zinken Mediating C. Plejadellus Sexual Behavior (Looper)., Porfirio Caballero Jan 1985

Allelochemicals From Soybean Affecting Pseudoplusia Includens (Walker) Biology And Pheromone From Chilo Plejadellus Zinken Mediating C. Plejadellus Sexual Behavior (Looper)., Porfirio Caballero

LSU Historical Dissertations and Theses

Extracts of foliage from the insect resistant soybean genotype PI227687 were bioassayed for activity against the soybean looper, Pseudoplusia includens (Walker), in feeding deterrency and growth inhibition tests. Dichloromethane extract had a pronounced deterrent effect on feeding, while petroleum ether and methanol extracts stimulated feeding. The water extract exhibited neutral activity. Flash chromatography of the dichloromethane extract yielded four fractions with moderate deterrent properties, one which was strongly deterrent, and one which was stimulative. Similar fractionation of the methanol extract yielded four fractions; one stimulated feeding, two deterred feeding, and one was neutral. Feeding P. includens larvae on artificial diet …


Detection Of Clavibacter Xyli Subsp. Xyli, The Ratoon Stunting Disease Bacterium, In Sugarcane By Dot Blot Hybridization., Jimmy Michael Kamso-Pratt Jan 1985

Detection Of Clavibacter Xyli Subsp. Xyli, The Ratoon Stunting Disease Bacterium, In Sugarcane By Dot Blot Hybridization., Jimmy Michael Kamso-Pratt

LSU Historical Dissertations and Theses

Recombinant DNA technology was used to produce a probe for detection of Clavibacter xyli subsp. xyli, the sugarcane ratoon stunting disease agent. C. xyli, subsp. xyli chromosomal DNA was digested with the restriction enzyme Pst 1, inserted into the plasmid pUC 19, and transformed into Escherichia coli JM 83. Recombinant clones containing six different sizes of C. xyli subsp. xyli DNA sequences were obtained. Plasmid K3-5, with an insert of 4.9Kb, and C. xyli subsp. xyli chromosomal DNA, were radiolabelled by nick translation using dCTP or dATP (alpha-('32)P). The labelled DNAs were used to detect homologous DNA sequences present in …


Control, Dynamics, And Kinetics Of Gas Exchange At The Onset And Offset Of Treadmill Exercise In The Pony (Oxygen Deficit, Debt, Ventilatory, Isocapric Hyperprea, Blood)., Scotty Kline Powers Jan 1985

Control, Dynamics, And Kinetics Of Gas Exchange At The Onset And Offset Of Treadmill Exercise In The Pony (Oxygen Deficit, Debt, Ventilatory, Isocapric Hyperprea, Blood)., Scotty Kline Powers

LSU Historical Dissertations and Theses

The purpose of experiment one was to develop and validate an open circuit technique (OCT) employing a mixing-chamber for measurement of gas exchange during non-steady-state exercise in humans and ponies. Serial measurements of oxygen uptake ((')VO(,2)) using human subjects and ponies were made during rest to exercise transitions using the OCT incorporating a time delay to match mixed expired gas concentrations with the appropriate ventilatory volume. Oxygen uptake calculated by the OCT did not differ significantly (P > 0.05) from (')VO(,2) obtained by Douglas bag procedures. These data demonstrate that an OCT analysis system is a sensitive means of (')VO(,2) measurement …


Armored Scale Insects (Homoptera: Diaspididae) Of Louisiana, F W. Howard Jan 1985

Armored Scale Insects (Homoptera: Diaspididae) Of Louisiana, F W. Howard

LSU Agricultural Experiment Station Reports

No abstract provided.


Cenobium 1985, Louisiana State University And Agricultural And Mechanical College, School Of Veterinary Medicine, P. K. Hendrix, Laura Hokett Jan 1985

Cenobium 1985, Louisiana State University And Agricultural And Mechanical College, School Of Veterinary Medicine, P. K. Hendrix, Laura Hokett

Cenobium Yearbook

Cenobium began publication in 1977 and continued through 1990. Produced by students, the yearbooks are a chronicle of the daily life and the special events experienced by veterinary students at the LSU School of Veterinary Medicine.


Lsu General Catalog 1985-1986, Louisiana State University And Agricultural And Mechanical College Jan 1985

Lsu General Catalog 1985-1986, 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.


Chemistry Of Plants From The Helianteae (Asteraceae) And Molluscicidal Activity And Phosphofructokinase Inhibition By Sesquiterpene Lactones (Calea, Squamopappus, Podachaenium, Biomphalaria Glabrata)., David Vargas Jan 1985

Chemistry Of Plants From The Helianteae (Asteraceae) And Molluscicidal Activity And Phosphofructokinase Inhibition By Sesquiterpene Lactones (Calea, Squamopappus, Podachaenium, Biomphalaria Glabrata)., David Vargas

LSU Historical Dissertations and Theses

As part of a biochemical systematic investigation of the tribe Helianteae (Compositae) for their secondary metabolites, Calea deltophylla Cowan from the subtribe Galinsoginae, Squamopappus skutchii (S. F. Blake) Jansen, Harriman and Urbatsch, from the Ecliptinae, and Podachaenium eminens (Lagasca) Shultz-Bip. from the Verbesininae were chemically investigated. Calea deltophylla provided the known compounds ageratochromene and eupatarone and three new compounds, 3-methoxy-4-hydroxyseneciophenone, caldeltophyllide and deltophyllin. Squamopappus skutchii yielded the known sesquiterpenoid (beta)-eudesmol, two new guaianolides, skutchiolides A and B, and the new eudesmanolide chapinolin. P. eminens provided three known guaianolides. The structures of the compounds were established by chemical and spectroscopic methods …


Containment Strategies For Marine Oil Spills In Nearshore Waters., E. H. Owens, H. H. Roberts, S. P. Murray, C. R. Foget Jan 1985

Containment Strategies For Marine Oil Spills In Nearshore Waters., E. H. Owens, H. H. Roberts, S. P. Murray, C. R. Foget

Faculty Publications

No abstract provided.


Modification Of Rice Flour And Its Potential Use In The Food Industry., Samir Sideek Alhusaini Jan 1985

Modification Of Rice Flour And Its Potential Use In The Food Industry., Samir Sideek Alhusaini

LSU Historical Dissertations and Theses

Rice flour was modified with either 0.1, 1.0 and 5.0% acetic or succinic anhydride for 1, 6 and 18 hr under basic conditions. The pH was maintained above 7.0 using either sodium hydroxide or sodium carbonate. The results showed that modified rice flours had lower fat content as compared with the unmodified rice flour (control). The type of anhydride significantly influenced the fat content of rice flour. Ash content of rice flour increased significantly due to the anhydride concentrations and alkali type. Significant differences were also found in the protein content of modified rice flours due to the use of …


Assessment Of Dairy Product Quality Utilizing Bacterial Enumeration And Metabolite Detection., Jay Russell Bishop Jan 1985

Assessment Of Dairy Product Quality Utilizing Bacterial Enumeration And Metabolite Detection., Jay Russell Bishop

LSU Historical Dissertations and Theses

A study was conducted to investigate the use of bacterial numbers and metabolites as estimators of the potential shelf-life of perishable dairy products, i.e., whole milk, skim milk and cottage cheese. The study was conducted in three phases. In the first phase, a method of impedance detection was performed at two incubation temperatures (18(DEGREES)C and 21(DEGREES)C), and its ability to estimate shelf-life of 100 commercially purchased milk samples compared to standard plate count (SPC), psychrotrophic bacteria count (PBC), modified psychrotrophic bacteria count (mPBC) and Mosely keeping quality test (MSPC). MSPC appeared to possess an adequate relationship to shelf-life (R = …


Karyology Of Lower Teleost Fishes (Clupeiformes, Taxonomy, Elopiformes, Phylogeny)., Albert John Doucette Jr Jan 1985

Karyology Of Lower Teleost Fishes (Clupeiformes, Taxonomy, Elopiformes, Phylogeny)., Albert John Doucette Jr

LSU Historical Dissertations and Theses

Karyotypes of nine species (Megalops atlanticus, Elops saurus, Brevoortia patronus, B. smithi, B. tyrannus, Dorosoma cepedianum, D. petenense, Harengula clupeola, and Anchoa mitchilli) and one hybrid (B. smithi x B. tyrannus) of teleost fishes revealed diploid complements ranging from 28 to 50 chromosomes and comprised of uniarmed elements or combinations of uniarmed and small and large biarmed elements. The occurance of large metacentric-submetacentric chromosomes was usually associated with a reduction in total chromosome number suggesting fusion events in the evolution of karyotypes from ancestral complements with 48 to 52 acrocentrics. Information from karyotypes is used to characterize species, genera, and …


The Population Ecology And Nutrient Transport Of Gulf Menhaden In Fourleague Bay, Louisiana (Mortality, Growth, Feeding, Production, Migration)., Linda Ann Deegan Jan 1985

The Population Ecology And Nutrient Transport Of Gulf Menhaden In Fourleague Bay, Louisiana (Mortality, Growth, Feeding, Production, Migration)., Linda Ann Deegan

LSU Historical Dissertations and Theses

An ecological study of the young-of-the-year of three year-classes of gulf menhaden (Brevoortia patronus) was conducted from July 1981 to December 1983 in Fourleague Bay, Louisiana. This study documented gulf menhaden population ecology and the importance of gulf menhaden in the nutrient and energy balance of estuaries. Young-of-the-year gulf menhaden immigrated in winter and moved to tidal creeks and ponds, where they remained until midsummer. They then moved into open bays, where they remained until the fall. This migration pattern coincides with sequentially available, but spatially separate, productivity peaks in marsh and open bays. In the fall, they emigrated to …


Metal Ion, Protein, Phytic Acid Interactions., Elaine Thompson Champagne Jan 1985

Metal Ion, Protein, Phytic Acid Interactions., Elaine Thompson Champagne

LSU Historical Dissertations and Theses

Insight into the mineral, protein, phytate relationships in rice bran was gained by examining the solubility behavior of these components. Solubility profiles of the phosphorus and nitrogen components as a function of pH did not correspond, except in the pH 1.0-2.0 range. This is evidence that association between protein and phytate only occurred in this low pH range. Potassium, magnesium, and calcium solubilities as a function of pH corresponded to those of the phytic acid salts of these minerals. Soluble magnesium and potassium phytates were isolated on Sephadex G-25-50 and identified by ICP, confirming their presence in rice bran. The …


Molecular Studies Of Thamnophiine Snakes., Robin Lawson Jan 1985

Molecular Studies Of Thamnophiine Snakes., Robin Lawson

LSU Historical Dissertations and Theses

Variation in alleles at gene loci encoding proteins was used to determine zoogeographic and evolutionary differentiation in thamnophiine snakes. Differentiation among populations within a species, among species within a genus, and among genera was investigated. In the southern banded water snake, Nerodia fasciata, analysis by F-statistics and genetic distances of allele frequencies indicated that extensive differentiation has occurred between those forms adapted to a saltwater environment (N. f. clarkii and N. f. compressicauda) and those adapted to a freshwater environment (N. f. fasciata, N. f. confluens, and N. f. pictiventris). Habitat disturbance is imputed as the causal agent in the …


The Biology Of Egg Production In The House Cricket, Acheta Domesticus L., Craig William Clifford Jan 1985

The Biology Of Egg Production In The House Cricket, Acheta Domesticus L., Craig William Clifford

LSU Historical Dissertations and Theses

Oogenesis commenced on day 3 (day 0 = adult ecdysis) in Acheta domesticus L., which, based on degeneration of the flight muscles, was approximately when juvenile hormone was released. Starvation did not prevent the onset of oogenesis, although egg production was greatly reduced. Virgin females did not oviposit and the oviducts filled with eggs by day 15. Compaction appeared to be a factor limiting oogenesis. The digestive tract was compressed and feeding reduced, which might be the primary factors terminating oogenesis. The concentration of juvenile hormone esterase (JHE) did not change as virgins filled with eggs, which indicated that JHE …


Inheritance Of Resistance To Sheath Blight In Long Grain Rice (Genetics, Fungus Disease)., Mamadou Goita Jan 1985

Inheritance Of Resistance To Sheath Blight In Long Grain Rice (Genetics, Fungus Disease)., Mamadou Goita

LSU Historical Dissertations and Theses

The inheritance of resistance to the sheath blight disease of rice (Oryza sativa L.), caused by Rhizoctonia solani Kuhn, was studied using as parent lines four susceptible commercial varieties--Lebonnet, Labelle, Starbonnet and Leah, and three resistant lines: L201, RU7902185 and RU7902191. The parental lines, F(,2) and F(,3) progeny of each cross were inoculated when the seedlings were 35 days old using the isolate LR172, and then kept in a humidity chamber for two weeks. The infection level of each plant was evaluated using a 0-9 rating system where 0 indicates no symptoms and 9 indicates the most severe infection. Infection …


Biochemical Systematics Of The Tyrannoidea (Aves) (Electrophoresis, Jackknifing, Phylogenetic Trees, Consensus Methods)., Scott Merrill Lanyon Jan 1985

Biochemical Systematics Of The Tyrannoidea (Aves) (Electrophoresis, Jackknifing, Phylogenetic Trees, Consensus Methods)., Scott Merrill Lanyon

LSU Historical Dissertations and Theses

The superfamily Tyrannoidea (Aves) has been the subject of numerous systematic investigations, yet the relationships among and within the five component families remain ambiguous. Relationships within the superfamily were investigated using starch gel electrophoresis of 20 enzyme loci in 14 cotinga genera, 12 manakin genera, the flycatcher genus Myiarchus, and each of the genera from the monogeneric families Phytotomidae and Dxyruncidae. Electrophoretic characters were found to contain considerable information concerning familial and subfamilial relationships within this New World assemblage. The Fitch-Margoliash "jackknife strict consensus tree" and a cladogram generated from the character state distributions were very similar and were used …


The Effect Of Metacognitive Strategy Training On Critical Reading Ability., Jacqueline Means Parson Jan 1985

The Effect Of Metacognitive Strategy Training On Critical Reading Ability., Jacqueline Means Parson

LSU Historical Dissertations and Theses

The ability to read materially critically is recognized as a goal of educators. The purpose of this study was to investigate the influence of training metacognitive strategies on critical reading ability. Critical reading was defined as the ability to judge or evaluate written materials and to compare them against some norm or standard. Metacognitive strategies encourage a conscious awareness of and/or control over one's own mental processes. A review of literature indicated that past researchers had considered critical reading as a distinct skill area, but more recently, educators have begun to recognize it as a part of the overall comprehension …


Symptoms In Relationship To Life Events (Stress, Social Supports, Life Experiences Survey, I-E Locus-Of-Control, Mmpi)., Karen Rinardo Speier Jan 1985

Symptoms In Relationship To Life Events (Stress, Social Supports, Life Experiences Survey, I-E Locus-Of-Control, Mmpi)., Karen Rinardo Speier

LSU Historical Dissertations and Theses

Although there is considerable evidence to support the contributions of life event stress to subsequent psychological and physical symptoms, the correlations reported between obtained stress scores and illness measurements have been low. This study was undertaken to improve prediction of physical and psychological complaints subsequent to life event stress by more comprehensive measurement of life event characteristics and by assessment of locus of control, social supports, and somatization as moderating variables in the life stress-illness process. An overview of psychosomatic medicine was given and the relevant life event research was reviewed. Fifty undergraduate students completed the experimental version of the …


Host Responses To The Phenolic-Glycolipid-1 Antigen Of Mycobacterium Leprae (Elisa, Leprosy, Epidemiology, Armadillo, Human)., Richard W. Truman Jan 1985

Host Responses To The Phenolic-Glycolipid-1 Antigen Of Mycobacterium Leprae (Elisa, Leprosy, Epidemiology, Armadillo, Human)., Richard W. Truman

LSU Historical Dissertations and Theses

Antibody responses to the apparently species specific phenolic-glycolipid-1 (Phen-Gl-1) antigen of Mycobacterium leprae were examined in humans and armadillos using enzyme-linked immunosorbent assays (ELISA). Statistical definitions for the interpretation of positive and negative reactions were derived. A retrospective serological survey of armadillos indicated that leprosy in the wild armadillo is a naturally acquired zoonosis. Presently 12.5% of the armadillos in 2 parishes in south central Louisiana have detectable IgM antibodies to Phen-Gl-1. Approximately 2.7% of these histologically exhibit clinical disease. Antibodies were not detected in Florida armadillo sera. Variations in prevalence rates were noted, and may be due to environmental …


Individual Differences And Their Relation To Social Structure In Domestic Cats., Rena Durr Mister Jan 1985

Individual Differences And Their Relation To Social Structure In Domestic Cats., Rena Durr Mister

LSU Historical Dissertations and Theses

Two groups of domestic cats with established social structures were tested for their response to novel stimuli in a variety of test situations. Clearly observable individual differences in responses were seen which were consistent over a series of test sessions and remained stable despite regular environmental disruptions. Individual differences in behavioral response were found not to be related to object dominance (food competition) or social dominance (freedom of movement in social encounters) unlike similar studies with social animals. No relationship was found in either group between rank in object dominance and rank in social dominance. Significant correlations were demonstrated between …


Metabolic Responses Of The Estuarine Gastropod Thais Haemastoma To Hypoxia (Energy Charge, Opine Dehydrogenase,Survival, Adaptation, Respiration)., Martin A. Kapper Jan 1985

Metabolic Responses Of The Estuarine Gastropod Thais Haemastoma To Hypoxia (Energy Charge, Opine Dehydrogenase,Survival, Adaptation, Respiration)., Martin A. Kapper

LSU Historical Dissertations and Theses

The hypoxia tolerance (LC-50) of Thais haemastoma was inversely related to acclimation temperature but was not related to acclimation salinity between 10 and 30(DEGREES)C and 10 and 30('o)/ooS. T. haemastoma is moderately tolerant to anoxia, the LT-50 (time to 50% mortality) being 12-22 days. Oxyregulatory ability varies from poor to good, and varies inversely with temperature. The oxygen consumption rate was lower after 28 days exposure to hypoxic conditions than at full oxygen saturation at all salinities at 20 and 30(DEGREES)C. Oxygen consumption was low at 10(DEGREES)C regardless of ambient PO(,2). Oxyregulatory ability in T. haemastoma did not show acclimation …