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1. Determination Of Manganese In Biological Samples. 2. Studies Of The Effects Of Aluminum And Decaying Vegetation On Aquatic Life Exposed To Acidity., Paula Mayard Deano Jan 1985

1. Determination Of Manganese In Biological Samples. 2. Studies Of The Effects Of Aluminum And Decaying Vegetation On Aquatic Life Exposed To Acidity., Paula Mayard Deano

LSU Historical Dissertations and Theses

Part One. Determination of Manganese in Sweat and Urine. A method has been developed for the direct determination of manganese in perspiration using graphite furnace atomic absorption spectroscopy. This method was applied to a study of manganese concentrations in perspiration and urine samples. Concentrations of manganese found in sweat were significantly higher than the concentrations in urine. Determination of the chemical form of manganese in sweat was attempted. Analysis of sweat using anodic stripping voltammetry strongly indicated that the manganese was organically bound. In addition the potential of interfacing liquid chromatography and inductively coupled plasma emission spectroscopy for the speciation …

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Epidemiology And Economic Implications Of Anaplasmosis In Louisiana (Prevalence, Incidence)., Randall Scott Morley Jan 1985

Epidemiology And Economic Implications Of Anaplasmosis In Louisiana (Prevalence, Incidence)., Randall Scott Morley

LSU Historical Dissertations and Theses

The research consisted of a literature review of the epidemiology of anaplasmosis and a descriptive epidemiological study of anaplasmosis in the Red River Plains and Southeast areas of Louisiana. The prevalence of anaplasmosis assessed by indirect fluorescent antibody (IFA) testing of 11,085 serum samples that had been obtained from cattle located in the study areas was 7.8%. Beef cattle appeared to show a higher Anaplasma antibody prevalence than dairy cattle, that is 11.2% to 3.8%, respectively. Among breeds, the Angus and Angus-cross animals seemed to show an increased susceptibility to infection. The prevalence of infection in free-roaming deer was determined …

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Antigenic Diversity And Cultural Behavior Of Chlamydia Psittaci Of Mammalian Origin (Chlamydial Abortion, Elisa, Persistent Infection, Immunofluorescence, Diagnosis)., Jorge Alejandro Perez-Martinez Jan 1985

Antigenic Diversity And Cultural Behavior Of Chlamydia Psittaci Of Mammalian Origin (Chlamydial Abortion, Elisa, Persistent Infection, Immunofluorescence, Diagnosis)., Jorge Alejandro Perez-Martinez

LSU Historical Dissertations and Theses

Suspension cultures of L-cells were infected with strains representing different biotypes of Chlamydia (C.) psittaci of bovine, ovine, caprine, equine, feline, porcine and guinea pig origin. Biotype-1 chlamydiae multiplied to high titers, and high yields of infectivity were obtained in subsequent passages. Chlamydial strains representative of other biotypes did not infect suspension cultures efficiently. Low rates of infection were obtained on the first passage, and the infectivity was lost while attempting subpassages. L-cells inoculated in suspension with more than one inclusion forming unit/L-cell of the chlamydial strain B577 and allowed to form monolayers, were destroyed within 15 days. However, upon …

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Growth, Efficiency And Physiological Changes Of Swine As Affected By Environmental Temperature, Energy Level And Lysine Source And Level (Fat, Season)., Alberto Ramon Ojeda Jan 1985

Growth, Efficiency And Physiological Changes Of Swine As Affected By Environmental Temperature, Energy Level And Lysine Source And Level (Fat, Season)., Alberto Ramon Ojeda

LSU Historical Dissertations and Theses

Two consecutive summer and winter trials involving low and high-heat increment diets were fed to growing-finishing swine, and three trials evaluating crystalline lysine utilization were conducted during the starting phase of growth. Dehydrated alfalfa meal and vegetable oil in factorial combination were fed during the winter months. Crystalline lysine and vegetable oil, also in factorial combination, were fed during the summer months. In the lysine utilization trials, crystalline or protein-bound lysine were each fed at three levels. Response criteria evaluated were rats and efficiency of gain, serum T(,3), T(,4) and cholesterol level in the winter and summer trials; and rate …

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Seedling Johnsongrass Growth In Sugarcane As Affected By Time Of Emergence (Agroecology, Sorha, Weed Potential)., Joseph Floyd Yoder Iii Jan 1985

Seedling Johnsongrass Growth In Sugarcane As Affected By Time Of Emergence (Agroecology, Sorha, Weed Potential)., Joseph Floyd Yoder Iii

LSU Historical Dissertations and Theses

Field studies were conducted to document seedling johnsongrass Sorghum halepense (L.) Pers. growth as influenced by date of emergence in sugarcane (Saccharum interspecific hybrids, cultivar 'CP 65-357'). The crop was in the plant cane year of growth in 1982 and 1983, and the first stubble year in 1984. The experiments were randomized complete block designs. Johnsongrass seedling emergence days were approximately three weeks apart, from April or early May through mid-July for a total of five emergence days each year. There were 36, 60, and 72 replicates for emergence days numbered 1 to 3, 4, and 5, respectively, over three …

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Developments Of Gas Chromatography - Atomic Absorption And H.P.L.C. - Atomic Absorption For Metal Speciation Studies (Reversed-Phase, Ultrasonic Nebulizer, Chromatography, Separation)., Jia-Cherng Wu Jan 1985

Developments Of Gas Chromatography - Atomic Absorption And H.P.L.C. - Atomic Absorption For Metal Speciation Studies (Reversed-Phase, Ultrasonic Nebulizer, Chromatography, Separation)., Jia-Cherng Wu

LSU Historical Dissertations and Theses

Part One. Speciation of Mercury by G.C.-A.A.. A new graphite atomic absorption (A.A.) detector for gas chromatography (G.C.) has been developed. It was directly interfaced to a gas chromatograph through a pyrex transfer line. The interfaced G.C.-thermal atomizer A.A. system was used to speciate and determine volatile mercury compounds in perspiration and urine. This interfaced system exhibited the excellent selectivity and high sensitivity to mercury compounds. Because of high sensitivity no sample preparation was necessary, avoiding losses and contamination which often occurs during sample pretreatment. Total mercury concentrations were determined with a quartz T atomic absorption system by direct injection …

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The Distribution, Transport And Age Structure Of Drums (Family Sciaenidae) Spawned In The Winter And Early Spring In The Continental Shelf Waters Off West Louisiana (Transit Time, Length-Frequency, Morphology, Density)., James Howard Cowan Jr Jan 1985

The Distribution, Transport And Age Structure Of Drums (Family Sciaenidae) Spawned In The Winter And Early Spring In The Continental Shelf Waters Off West Louisiana (Transit Time, Length-Frequency, Morphology, Density)., James Howard Cowan Jr

LSU Historical Dissertations and Theses

Aspects of the early life history of 6 species of sciaenids that spawned in west Louisiana shelf waters from December 1981 to April 1982 were studied. This research documented the distribution of larvae and tested a transport hypothesis that detailed advective processes which affected their distribution and, ultimately, recruitment into estuaries in southwest Louisiana, and provided information on larva age and growth. Ranked in order of abundance the six sciaenid species collected were: sand seatrout (Cynoscion arenarius); Atlantic croaker (Micropogonias undulatus); spot (Leiostomus xanthurus); black drum (Pogonias cromis); southern kingfish (Menticirrhus americanus; and banded drum (Larimus fasciatus). Atlantic croaker, spot …

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Effect Of Anaerobic Root Environments On Fraxinus Pennsylvanica Marsh. And Quercus Nigra L., Billy John Good Jan 1985

Effect Of Anaerobic Root Environments On Fraxinus Pennsylvanica Marsh. And Quercus Nigra L., Billy John Good

LSU Historical Dissertations and Theses

Responses of green ash (Fraxinus pennsylvanica Marsh.) and water oak (Quercus nigra L.) to anaerobic root environments were investigated. Initially, analytical methods pursuant to this objective were developed. An extraction solution containing DDT (dithio- threitol) and soluble polyvinylpyrrolidone proved best for oak ADH and protein recovery, while DTT and insoluble polyvinylpolypyroli- done were best for ash. A method for the control of the soil atmosphere surrounding intact roots was developed to study the effects of elevated CO(,2) in the anaerobic soil atmosphere of ash and oak seedlings. Ethanol, malate, ADH, ME (NADP-malic enzyme), CO(,2), and O(,2) within the root systems …

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Development Of A Computer-Assisted Instruction Courseware Package In Statistics And A Comparative Analysis Of Three Management Strategies For This Courseware., Preston Dinkins Jan 1985

Development Of A Computer-Assisted Instruction Courseware Package In Statistics And A Comparative Analysis Of Three Management Strategies For This Courseware., Preston Dinkins

LSU Historical Dissertations and Theses

The purpose of this study was to develop and evaluate a tutorial computer-assisted instruction (CAI) lesson teaching the normal distribution and standard scores. Instruction on the normal curve, and unit-normal curve, z-scores, areas under the normal curve, and standard scores was given in this study. This CAI courseware was created in order to teach or review these concepts to graduate students in education. An evaluation of this CAI lesson was conducted. It consisted of a small scale pilot test, and a 2 x 3 factorial design experiment. The pilot test study was conducted so that reaction data to this software …

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Natural Control And Spatial Distribution Of Fall Armyworm (Spodoptera Frugiperda) Within Louisiana Corn Fields., Forrest Lee Mitchell Jan 1985

Natural Control And Spatial Distribution Of Fall Armyworm (Spodoptera Frugiperda) Within Louisiana Corn Fields., Forrest Lee Mitchell

LSU Historical Dissertations and Theses

Spatial distribution of fall armyworm, Spodoptera frugiperda (J. E. Smith), (FAW) was studied in cornfields at the St. Gabriel Experiment Station in Louisiana from 1981 to 1983. Corn plants were sampled and FAW larvae counted and divided into categories of small, medium, and large for both single plant and five plant samples. Count data for each category by date were then fitted to Poisson, negative binomial, and Neyman type A distributions. Means and variances for each category by date were also analyzed with the Taylor Power law. Small larvae were more aggregated than the medium larvae which were more aggregated …

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A Probabilistic Development Of Nutrient Criteria For Louisiana Rivers And Streams (Eutrophication, Dissoved Oxygen, Algae, Standards, Nitrogen)., Constantine Evan Mericas Jan 1985

A Probabilistic Development Of Nutrient Criteria For Louisiana Rivers And Streams (Eutrophication, Dissoved Oxygen, Algae, Standards, Nitrogen)., Constantine Evan Mericas

LSU Historical Dissertations and Theses

The objective of this investigation was the development of quantitative criteria based on the estimation of maximum levels of oxygen demand associated with specific levels of nutrients in algal dominated streams. 1582 intensive survey records were obtained from the Louisiana Department of Environmental Quality (LA DEQ). A sub-set of 225 records was defined by a minimum chlorophyll a of 10.0 ug/l and influential observation analysis to restrict the data to streams where algal processes were likely to be dominant. Nitrogen, as measured by total Kjeldahl nitrogen (TKN) was identified as the principle nutrient of concern in the prediction of algal …

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Origin And Sedimentary Characteristics Of Discrete Sand Beds In Modern Sediments Of The Central Texas Continental Shelf (Storm, Hurricane, Geostrophic, Waves, Turbidities)., John William Snedden Jan 1985

Origin And Sedimentary Characteristics Of Discrete Sand Beds In Modern Sediments Of The Central Texas Continental Shelf (Storm, Hurricane, Geostrophic, Waves, Turbidities)., John William Snedden

LSU Historical Dissertations and Theses

Thin (1-9 cm) discrete beds of sand and silt are present in the clayey modern sediments of the Texas shelf. Observation of seaward size-grading within the beds indicates that the source of the clastics is the adjacent coastal zone. Consideration of the nature of wave and current processes during storms and the dimensions of possible coastal sub-environment sources suggests that the shoreface supplied the sand found in the discrete sand beds. The seaward grading and along-shelf continuity of a correlative horizon dated as having been deposited during the passage of Hurricane Carla in 1961 imply that transport was along-shelf but …

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Characterization Of The Modified Phagocytic Vacuole Occupied By Intracellular Toxoplasma Gondii (Macrophage, Protozoa)., L. David Sibley Jan 1985

Characterization Of The Modified Phagocytic Vacuole Occupied By Intracellular Toxoplasma Gondii (Macrophage, Protozoa)., L. David Sibley

LSU Historical Dissertations and Theses

Toxoplasma gondii is a protozoan parasite which resides in modified endocytic compartments of host cells. Extensive intracellular replication and host cell lysis leads to acute toxoplasmosis which is eventually limited by the host immune response to a chronic state of infection. The features of this unique intracellular compartment, which enables Toxoplasma to survive in macrophages, are reported here. Although Toxoplasma survives in normal macrophages, activated macrophages from immune animals rapidly killed Toxoplasma by production of oxygen radicals and intermediates generated during parasite invasion. In addition, activated macrophages inhibited Toxoplasma growth by an oxygen-independent mechanism. Qualitative and quantitative features of oxygen …

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Production And Nitrogen Dynamics Of A Vallisneria Americana Grass Bed In Lake Pontchartrain, Louisiana (Nitrogen Cycle, Modeling, Seagrasses, Decomposition Phenology, Vallisneria-Celery Grass-Eelgrass, Environmental Factors)., Diana Lee Steller Jan 1985

Production And Nitrogen Dynamics Of A Vallisneria Americana Grass Bed In Lake Pontchartrain, Louisiana (Nitrogen Cycle, Modeling, Seagrasses, Decomposition Phenology, Vallisneria-Celery Grass-Eelgrass, Environmental Factors)., Diana Lee Steller

LSU Historical Dissertations and Theses

Vallisneria americana grass beds of Lake Pontchartrain contribute approximately 200 g dry weight/m('2)/yr primary production, a continuous release of detrital material, and rapid nutrient recycling. A harvest method was used to estimate production. The addition of litterfall to harvest production raised annual production estimates by up to 28%. When litterfall was corrected for decomposition, the production estimates were raised by up to 85% over harvest estimates alone. Litterfall and decomposition increased toward shore and occurred throughout the year providing a continuous supply of energy and nutrients. Grass bed production varied along the coastline and was greatest at mid-depths. Values of …

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Aqueous Phase Oxidation Of Organics (Wet-Air, Vapor-Liquid Equilibrium, Synergism, Free Radical, Xylene, Phenol)., Richard Scott Willms Jan 1985

Aqueous Phase Oxidation Of Organics (Wet-Air, Vapor-Liquid Equilibrium, Synergism, Free Radical, Xylene, Phenol)., Richard Scott Willms

LSU Historical Dissertations and Theses

Fundamental disappearance kinetics parameters have been obtained for four compounds individually subjected to aqueous phase oxidation. These four compounds are m-xylene, phenol, tetrachloroethylene, and malathion. Concentration histories were obtained using a one liter "sampled-batch" reactor. Reaction conditions ranged from 114-290 (DEGREES)C and 1000-2500 psi air. A kinetics model incorporating vapor-liquid equilibrium effects was developed and used to determine reaction rate constants. The reactions were found to be first order in organic and 1/2 order in oxygen. Induction periods were observed for m-xylene and phenol. The durations of these periods were found to be inversely proportional to oxygen concentration. Activation energies …

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Part I: Comparison Of An "As-Needed" And "Full-Season" Insecticide Application Schedule For Control Of Cotton Insects In Northeast Louisiana. Part Ii: The Utilization Of Vegetable Oil As A Carrier For Ultra-Low-Volume Aerial Sprays Applied For Cotton Insect Control., Henry Russ Mitchell Jan 1985

Part I: Comparison Of An "As-Needed" And "Full-Season" Insecticide Application Schedule For Control Of Cotton Insects In Northeast Louisiana. Part Ii: The Utilization Of Vegetable Oil As A Carrier For Ultra-Low-Volume Aerial Sprays Applied For Cotton Insect Control., Henry Russ Mitchell

LSU Historical Dissertations and Theses

A small plot study to determine the effects of a "as-needed" and "full-season" insecticide regime on the major arthropods, growth, and yield of cotton was conducted over a three year period (1982-1984). In the "as-needed" regime, acephate (4 g/kg of seed) was applied as a seed treatment at planting and application of foliar insecticides were initiated when cotton insect pests reached the threshold level. In the "full-season" regime, aldicarb (0.05 kg/ha) was applied in-furrow at planting and application of foliar insecticides were initiated when squares reached 1/3 grown and continued on a six to seven day schedule throughout the season. …

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Evaluation Of Romanomermis Culicivorax As A Biocontrol Agent Of Larval Mosquitoes In Louisiana Ricelands (Mermithidae, Nematode, Psorophora Columbiae, Parasitism)., Todd Warner Walker Jan 1985

Evaluation Of Romanomermis Culicivorax As A Biocontrol Agent Of Larval Mosquitoes In Louisiana Ricelands (Mermithidae, Nematode, Psorophora Columbiae, Parasitism)., Todd Warner Walker

LSU Historical Dissertations and Theses

Bionomic data were collected to evaluate Romanomermis culicivorax as a biocontrol agent of larval mosquitoes in Louisiana ricelands. In laboratory studies, the ability of R. culicivorax preparasites to infect Psorophora columbiae larvae substantially decreased after hosts were approximately 28 hr old. Parasitism at typical Louisiana rice field temperatures of 26, 29, and 32 (+OR-) 0.5(DEGREES)C showed a significant linear decrease (P < 0.01) as the percentage of older larval instars increased at the times of exposure. These data emphasized the need for a synchronous field application of preparasites to challenge the rapidly developing early instars of Ps. columbiae. Based on those data, applications of postparasites to potential mosquito breeding habitats offer greater flexibility in larval mosquito control programs. A floating bioassay container, constructed of plastic pipe, 50 mesh screening, and 8 oz (0.24 liter) sample bottles, was developed to evaluate R. culicivorax postparasites in irrigated agricultural land. Applications of postparasites applied at dosage rates of 0.025 and 0.05 g/m('2) resulted in the establishment, recycling, and overwintering of R. culicivorax in a riceland habitat in southern Louisiana. Infection rates ranged from 0 to 54.1% during the 22 month study. There was no significant differences (P > 0.05) between dosage rates among the plots and parasitism of Ps. columbiae larvae held in the bioassay containers. Depth of oviposition by R. culicivorax was determined by using soil cores previously inoculated with postparasites. Romanomermis culicivorax was found to …

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The Impact Of Individual Species And Complexes Of Pest Arthropod Species On Soybean Grown On Various Row Spacings (Insect Pest Complexes, Non-Conventional Row Spacing)., Jaime Yanes Jr Jan 1985

The Impact Of Individual Species And Complexes Of Pest Arthropod Species On Soybean Grown On Various Row Spacings (Insect Pest Complexes, Non-Conventional Row Spacing)., Jaime Yanes Jr

LSU Historical Dissertations and Theses

During 1982 and 1983, selective soil and foliar insecticides were applied to soybean, Glycine max (L.) Merrill, planted on narrow (51 cm) and wide (76 cm) row spacings to manipulate soybean insects. Individual species and complexes of arthropod species were manipulated in plots to determine the effects of subterranean and above-ground insects on soybean growth and yield potential. Selective insecticides used in a selective manner proved to be an effective tool for studying insect pest complexes. Sub-threshold levels of individual pest species, in combination, had a significant negative impact on yield. In addition, in 1982, the plots in which soybean …

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Influence Of Vegetation Manipulation And Selected Cultural Practices On Predation In Louisiana Sugarcane Ecosystems (Saccharum, Sorghum, Solenopsis, Spiders, Araneae)., Ahmed Daoud Ali Jan 1985

Influence Of Vegetation Manipulation And Selected Cultural Practices On Predation In Louisiana Sugarcane Ecosystems (Saccharum, Sorghum, Solenopsis, Spiders, Araneae)., Ahmed Daoud Ali

LSU Historical Dissertations and Theses

A 3-yr study on southeastern Louisiana sugarcane (Saccharum officinarum L. 'CP 65-357') revealed abundance and diversity of both ground- and foliage-associated predators and prey to be higher in weedy than in weed-free habitats. The imported fire ant (IFA), Solenopsis invicta Buren, major predator of the key insect pest, the sugarcane borer, Diatraea saccharalis (F.) , was more abundant in weedy (17 mounds/ha) than in weed-free (5 mounds/ha) habitats. Azinphosmethyl, commonly used for D. saccharalis control, decreased system stability through food web route disruption by decreasing coleopterans, phytophagous insects collectively, and spiders 51, 35, and 67%, respectively. Cane and sugar yields …

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The Behavioral Ecology Of The First Instar Southern Green Stink Bug, Nezara Viridula (L.) (Aggregation, Pheromone, Embryo, Egg, Nymph)., Jeffrey Alan Lockwood Jan 1985

The Behavioral Ecology Of The First Instar Southern Green Stink Bug, Nezara Viridula (L.) (Aggregation, Pheromone, Embryo, Egg, Nymph)., Jeffrey Alan Lockwood

LSU Historical Dissertations and Theses

Outer row embryos of the southern green stick bug, Nezara viridula (L.), orient toward the center of the egg mass; inner row embryos do not. Embryonic orientation was mediated by stimuli provided by the glue which holds the egg mass together. Physical and chemical orientation cues associated with the glue were present only on the inner surfaces of outer row eggs; other eggs received no such differential stimuli and therefore oriented as a function of the oviposition behavior of the female. Embryonic orientation assured that upon hatching, outer row nymphs received the stimulation necessary for arrestment and inclusion in the …

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Biology, Economic Injury, And Plant Resistance Studies With The Fall Armyworm, Spodoptera Frugiperda (J. E. Smith), On Rice, Oryza Sativa L. (Screening, Puerto Rico, Louisiana)., Alberto Pantoja-Lopez Jan 1985

Biology, Economic Injury, And Plant Resistance Studies With The Fall Armyworm, Spodoptera Frugiperda (J. E. Smith), On Rice, Oryza Sativa L. (Screening, Puerto Rico, Louisiana)., Alberto Pantoja-Lopez

LSU Historical Dissertations and Theses

A method for screening rice, Oryza sativa L., germplasm for resistance to the fall armyworm, Spodoptera frugiperda (J. E. Smith), was developed. Infesting rice seedlings grown in the greenhouse proved to be an efficient method to identify sources of resistance. In the evaluation of over 5,000 rice accessions, moderate resistance to S. frugiperda larval defoliation was detected in plant introductions 160842, 346830, 346833, and 346853. Moderate levels of resistance were also detected in the United States cultivars 'Honduras', 'Newrex', and 'Chinese'; and in O. glaberrima Steud accessions 101800, 102554, and 369453. Effects of S. frugiperda feeding on rice were studied …

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Permethrin And Fenvalerate Hydrolysis In Pseudoplusia Includens (Walker) And Heliothis Virescens (F.)., Patrick Francis Dowd Jan 1985

Permethrin And Fenvalerate Hydrolysis In Pseudoplusia Includens (Walker) And Heliothis Virescens (F.)., Patrick Francis Dowd

LSU Historical Dissertations and Theses

Fenvalerate, and cis- and trans-permethrin were hydrolyzed by eggs, larvae, pupae, and adults of P. includens and H. virescens. Hydrolysis (per larva) increased logarithmically to a maximum in last instars for the three pyrethroids in both insect species. trans-Permethrin hydrolysis was maximal in midguts, fat bodies, and cuticles of last instar P. includens in the late feeding stage. Changes in rates of hydrolysis appeared to influence toxicity. The midgut of both P. includens and H. virescens was generally the most active tissue in hydrolyzing the three pyrethroids tested. trans-Permethrin was generally hydrolyzed more rapidly than cis-permethrin or fenvalerate. cis- and …

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Africanized And European Honey Bee (Apis Mellifera L.) Pollen And Nectar Foraging Behavior And Honey Production In The Neotropics (Venezuela)., Daniel Pesante Jan 1985

Africanized And European Honey Bee (Apis Mellifera L.) Pollen And Nectar Foraging Behavior And Honey Production In The Neotropics (Venezuela)., Daniel Pesante

LSU Historical Dissertations and Theses

A one year study was conducted on pollen collection, nectar foraging, and honey production of Africanized and European honey bees in the neotropics (Venezuela). Africanized bees had a larger proportion of their foraging force foraging for pollen and therefore collected significantly larger quantities of pollen. This higher amount of collected pollen provides the protein necessary to support increased brood production and thereby increases the opportunities for Africanized colonies to cast multiple swarms through an annual cycle. Distinctly different patterns in nectar foraging by Africanized and European bees were detected. Africanized bees had lower proportions of the foraging force engaged in …

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Combustion Of Dichloromethane In A High Temperature Flat Flame (Incineration, Hazardous Waste, Pics)., Dwight William Senser Jan 1985

Combustion Of Dichloromethane In A High Temperature Flat Flame (Incineration, Hazardous Waste, Pics)., Dwight William Senser

LSU Historical Dissertations and Theses

A series of premixed, laminar, one-dimensional CH(,2)Cl(,2)/CH(,4)/air flat flames have been studied to develop a better understanding of the combustion characteristics of toxic chlorinated hydrocarbons. A facility capable of sustained operation in the highly corrosive environment associated with chlorinated hydrocarbon combustion was developed for this study. This facility and the gas chromatographic procedures for the analysis of C(,1) and C(,2) hydrocarbons and chlorinated hydrocarbons in combustion products are described in detail. Stable species mole fractions and temperature profiles for a series of six flames were obtained at 750 Torr with uncooled quartz microprobes and fine gage thermocouples. Equivalence ratios were …

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Dependence Of Fishery Species On Salt Marshes: The Role Of Food And Refuge, Donald F. Boesch, R. Eugune Turner Dec 1984

Dependence Of Fishery Species On Salt Marshes: The Role Of Food And Refuge, Donald F. Boesch, R. Eugune Turner

Faculty Publications

Salt marshes are widely believed to serve as nurseries for many fishes and crustaceans of fishery value as a result of the high production of vascular plant detritus and the protection from predation offered by shallow, spatially complex habitats. Comparisons of the yields of species which reside in salt marsh habitats during critical life history stages (such as penaeid shrimp) with the area of such habitats and their greater densities in flooded marshes and associated tidal creeks support the premise that marshes enhance the yield of such species. A range of evidence, including the amount of detrital export from marshes, …

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The Gyroscope Test Of Relativity, B. M. Barker, R. F. O'Connell Dec 1984

The Gyroscope Test Of Relativity, B. M. Barker, R. F. O'Connell

Faculty Publications

No abstract provided.

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Louisiana Agriculture Magazine, Fall 1984, Lsu Agricultural Experiment Station Oct 1984

Louisiana Agriculture Magazine, Fall 1984, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

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Effect Of Inoculum Density On Reproduction Of Reniform Nematode Rotylenchulus Reniformis And On Root Development Of Sweet Potato Cultivars, Alice Karikurubu Sep 1984

Effect Of Inoculum Density On Reproduction Of Reniform Nematode Rotylenchulus Reniformis And On Root Development Of Sweet Potato Cultivars, Alice Karikurubu

LSU Historical Dissertations and Theses

The effect of inoculum density on reproduction of the reniform nematode, Rotylenchulus reniformis, and on root development of sweet potato cultivars; W-152, Centennial, Porto Rico and Goldrush was studied under greenhouse conditions. The inoculum density had no significant effect on the root weight of the cultivars tested. The number of mature females on root systems was higher at the highest inoculum level and the number of eggs per female was significantly higher at lower densities. The number of eggs produced per root system at different inoculum densities was not significantly different on the cultivar Goldrush but was higher on the …

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Effect Of Inoculum Density On Reproduction Of Reniform Nematode Rotylenchulus Reniformis And On Root Development Of Sweet Potato Cultivars, Alice Karikurubu Sep 1984

Effect Of Inoculum Density On Reproduction Of Reniform Nematode Rotylenchulus Reniformis And On Root Development Of Sweet Potato Cultivars, Alice Karikurubu

LSU Historical Dissertations and Theses

The effect of inoculum density on reproduction of the reniform nematode, Rotylenchulus reniformis, and on root development of sweet potato cultivars; W-152, Centennial, Porto Rico and Goldrush was studied under greenhouse conditions. The inoculum density had no significant effect on the root weight of the cultivars tested. The number of mature females on root systems was higher at the highest inoculum level and the number of eggs per female was significantly higher at lower densities. The number of eggs produced per root system at different inoculum densities was not significantly different on the cultivar Goldrush but was higher on the …

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Job Satisfaction Of Vocational Agriculture Teachers In The Southeastern United States., Abdul Patah Bin Abdul Malek Jan 1984

Job Satisfaction Of Vocational Agriculture Teachers In The Southeastern United States., Abdul Patah Bin Abdul Malek

LSU Historical Dissertations and Theses

Job satisfaction of vocational agriculture teachers in the Southeastern United States was examined. A total of 355 teachers from seven states--Louisiana, Florida, Mississippi, Alabama, Virginia, Arkansas, and North Carolina--responded to the survey. Job satisfaction was measured by the Job Descriptive Index (JDI) which had six scales--work on present job, present pay, opportunities for promotion, supervision on present job, people on the job, and job in general. Fourteen demographic variables selected to be used as independent variables were age, highest degree completed, current annual salary, years of teaching experience, number of months employed per year, average number of students per class, …

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