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Theses/Dissertations

1980

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Full-Text Articles in Life Sciences

Effects Of Self-Pollination In The Genus Pinus, Liz Cole Dec 1980

Effects Of Self-Pollination In The Genus Pinus, Liz Cole

Undergraduate Honors Capstone Projects

The problems of self-pollination among trees are a major concern to foresters. Silvicultural practices have an effect on the frequency of self-pollination.For example, a cut, such as a shelterwood or seed tree, reduces the number of individuals in the breeding population and increases the distance between individual trees. This tends to increase the frequency of self-pollination. These effects can either be helpful or harmful depending on the goals of the forester. Therefore, a basic understanding as to the effects of self-pollination on trees is necessary. The point of focus in this paper is the genus, Pinus.

Self-pollination occurs naturally ...


Embryonic Chick Brain Fluid Hyaluronidase: Its Characterization, Changes In Moiety And Regulation During Chick Brain Morphogenesis, Eliud N. Waindi Dec 1980

Embryonic Chick Brain Fluid Hyaluronidase: Its Characterization, Changes In Moiety And Regulation During Chick Brain Morphogenesis, Eliud N. Waindi

ETD Collection for AUC Robert W. Woodruff Library

Hyaluronidase and hyaluronic acid have been shown to play an important role in regulating embryogenesis in several animals. Experimental evidence indicates that hyaluronic acid regulates embryonic morphogenesis by preventing untimely cellular interactions and, hence, permits the appropriate accumulation of cells. It is degraded by hyaluronidase at an appropriate time during embryogenesis to allow cellular interaction leading to coordinate differentiation.

Currently research is directed towards understanding the mechanism of action of hyaluronidase on hyaluronic acid and the structure and moiety relationship of these two important compounds. These studies have included charac terization of hyaluronidase from different sources, and have resulted in ...


The Influence Of Fire And Site Factors On Vegetation Pattern And Process: A Case Study Of The Western Portion Of Great Smoky Mountains National Park, Mark Edward Harmon Dec 1980

The Influence Of Fire And Site Factors On Vegetation Pattern And Process: A Case Study Of The Western Portion Of Great Smoky Mountains National Park, Mark Edward Harmon

Masters Theses

Fire history, the initial effect of fire disturbance on community structure, the response of communities one and two years after fire disturbance, and the present-day vegetation patter were examined in the westernmost portion of the Great Smoky Mountains National Park in Tennessee and North Carolina.

Sectioning of fire scars, field observations, historical accounts, and fire control records indicated that the fire disturbance regime has changed dramatically during the last 200 years. Man-caused fires have probably been an important disturbance since Indians migrated into the area over 12 thousand years ago. Between 1790 and 1940, Euro-American man frequently burned the landscape ...


Physical Properties Of Dna From Synchronously Grown Mesophilic And Thermophilic Bacteria, Carol A. Cox Dec 1980

Physical Properties Of Dna From Synchronously Grown Mesophilic And Thermophilic Bacteria, Carol A. Cox

Master's Theses

No abstract provided.


The Effect Of Lead On Developing Rat Brain Lipids, Larry J. Stegink Dec 1980

The Effect Of Lead On Developing Rat Brain Lipids, Larry J. Stegink

Master's Theses

The objective of this study was to determine the effect of lead on the brain lipids of developing rats.

Lead acetate was added to the drinking water of two pregnant rats. A' control dam was maintained on the same diet without the lead. Following birth and weaning the lead concentration was reduced and an equal number of pups from each litter were sacrificed on days 19, 22, 26, 30, and 35 after birth. The brain lipids were isolated and fatty acid distribution analyzed by gas-liquid chromatography.

Variations in fatty acid distribution between the control and experimental pups were noted for ...


An Analysis Of Cadmium And Lead Uptake In Hydroponically Grown Corn Seedlings, Julie Jones Medlin Dec 1980

An Analysis Of Cadmium And Lead Uptake In Hydroponically Grown Corn Seedlings, Julie Jones Medlin

Dissertations

The purpose of this study was to analyze selected growth parameters of hydroponically grown corn seedlings (Zea mays) in relation to the uptake of the heavy metals, lead and cadmium. The corn seedlings were treated with various concentrations of lead and cadmium at different levels of pH, and phosphate and ferric ion concentrations. Root and shoot lengths were measured before and after heavy metal treatment to determine the relative growth in the different treatment solutions. Wet and dry weights were also obtained. The plant material was digested with nitric and perchloric acids in preparation for analysis for heavy metal content ...


Studies On The Scorpions Of Libya, Nuri Milad Barbash Dec 1980

Studies On The Scorpions Of Libya, Nuri Milad Barbash

Master's Theses

No abstract provided.


Fetal Alcohol Effects: A Review Of The Current Literature And A Proposed Study Of The Possible Additive Effects Of Marihuana And Alcohol On The Fetus, Shirley Lange Kamp Dec 1980

Fetal Alcohol Effects: A Review Of The Current Literature And A Proposed Study Of The Possible Additive Effects Of Marihuana And Alcohol On The Fetus, Shirley Lange Kamp

Master's Theses

The purpose of this paper was to review the current state of knowledge regarding the effects of alcohol ingestion during pregnancy, to determine the specific issues that remain under speculation, and to develop a theoretical research design which might aid in determining the role, if any, of marihuana in compounding fetal alcohol effects.

The literature reviewed indicated that alcohol creates a continuum of fetal effects from mild abnormalities to the full fetal alcohol syndrome; current marihuana studies suggest possible adverse effects on the fetus. The research model was based on this evidence, the well documented usage of both drugs by ...


Zooplankton Abundance And Diversity In A Hydrilla Infested Central Florida Lake, Don C. Schmitz Oct 1980

Zooplankton Abundance And Diversity In A Hydrilla Infested Central Florida Lake, Don C. Schmitz

Retrospective Theses and Dissertations

Zooplankton abundance, hydrilla biomass, and physicochemical parameters were sampled for one year in a small central Florida lake. Annually, rotifers comprised most of the species collected and were the most abundant zooplankton group. Hydrilla biomass was lowest during winter and spring while orthophosphate and phtoplankton concentrations were highest. Zooplankton densities were highest when hydrilla biomass was low. Small-bodied limnetic herbivores comprised most of the zooplankton during the spring. Zooplanton abundances were lowest during summer and fall and may have been either directly or indirectly related to the hydrilla growth. Factors, such as lower phytoplankton and dissolved oxygen concentrations, possible increased ...


Functions Of Deadenylation Factors In Mrna Decay And Mrna Processing Body Formation, Dinghai Zheng Sep 1980

Functions Of Deadenylation Factors In Mrna Decay And Mrna Processing Body Formation, Dinghai Zheng

UT GSBS Dissertations and Theses (Open Access)

Most newly synthesized messenger RNAs possess a 5’ cap and a 3’ poly(A) tail. The process of poly(A) tail shortening, also termed deadenylation, is important for post-transcriptional gene regulation, because deadenylation not only leads to mRNA translational inhibition but also is the first step of major mRNA degradation. Translationally inhibited mRNAs can be stored and/or degraded in dynamic cytoplasmic foci termed mRNA processing bodies, or P bodies, which are conserved in eukaryotes.

To shed new light on the mechanisms of P body formation and P body functions, I focused on the link between deadenylation factors and P ...


H+ And K+ Transport In Nitella, Daniel John Holland Aug 1980

H+ And K+ Transport In Nitella, Daniel John Holland

Biology Master’s Theses

This study attempts to determine if a fixed stoichiometry of the K+­­/H+ exchange is present in Nitella clavata. Nitella was cultured with constant aeration under illumination of approximately 2000 lux measured at the culture solution surface, with sixteen hours of illumination alternated with eight hours of darkness. Internodal cells were harvested by excision, with harvested cells ranging from 3-5 cm in length and 700-900 μm in diameter. Isolated cells were then placed in a 5.70 pH K solution and kept in an incubator at 22°C under 350 lux illumination. Cells were preconditioned for seven days before experimentation ...


Reproductive And Mutagenic Effects Of 5-Thio-D-Glucose Injections In Male Mice, Mus Musculus, Icr Strain, Mary E. Mcmanaway Aug 1980

Reproductive And Mutagenic Effects Of 5-Thio-D-Glucose Injections In Male Mice, Mus Musculus, Icr Strain, Mary E. Mcmanaway

Master's Theses

Adult male ICR mice of proven fertility were intraperitoneally injected daily with 60 mg/kg of 5-thio-D-glucose for 28 days. Body weights of treated male mice were unaffected during the experimental period. Relative testicular weights were significantly reduced at 121 days after initial injections in 5-thio treated males, but no significant decrease was observed at 28 days.

Onset of sterility was estimated to occur at approximately 4 weeks and persisted for 5 to 6 weeks after cessation of treatment at which time fertility was restored.

Beginning with the first injections and continuing for 121 days, the males were mated with ...


A Transmission And Scanning Electron Microscopic Analysis Of The In Vitro Development Of Rana Clamitans Larvae Notochord As Stimulated By L-Azetidine-2-Carboxylic Acid, Marilyn A. Sutton Aug 1980

A Transmission And Scanning Electron Microscopic Analysis Of The In Vitro Development Of Rana Clamitans Larvae Notochord As Stimulated By L-Azetidine-2-Carboxylic Acid, Marilyn A. Sutton

ETD Collection for AUC Robert W. Woodruff Library

The notochord, a characteristic vertebrate structure, has been the subject of investigation for many years; yet, the information is scant. This structure is important for it aids in the establishment of bilateral symmetry in the developing embryo. The amphibian and chick embryo notochords have been investigated recently, and a pattern of normal development was proposed. The notochord develops in phases: bilaminar; rod-like unvacuolated; rod-like and vacuolated. These phases encompass changes in shape, orientation and position of the cells, an increase in cell contacts, and the laying do\~ of a basal lamina. An increasing complexity within the cytoplasm also accompanies the ...


The Effects Of Benzo(A)Pyrene And Vitamin E On Chinese Hamster Cells In Vitro, Freeman Earl Smalls Aug 1980

The Effects Of Benzo(A)Pyrene And Vitamin E On Chinese Hamster Cells In Vitro, Freeman Earl Smalls

ETD Collection for AUC Robert W. Woodruff Library

The objective of this research was to study the cytogenetic effects of benzo(a)pyrene (BP) and Vitamin E (DL-alpha-tocopherol) on Chinese hamster (Don) and Chinese hamster ovary (CHO) cells.

CHO cells were exposed to a 0.1, 1, ad 5 ug/ml BP for 27 hrs. Observation revealed that BP caused chromosomal aberrations in CHO cell without metabolic activation. Types of aberrations observed were breaks, gaps, polyploids, fusions and endoreduplications. In other studies, Chinese hamster (Don) cells were exposed to 5 ug/ml BP activated by rat liver microsomal system (S9-mix). Cytogenic analysis indicated that S9-mix significantly increased the ...


The Effects Of Photoperiod And Melatonin Injections On The Reproductive System Of Male Mice, Mus Musculus, Icr Strain, Margaret Ann Shugart Aug 1980

The Effects Of Photoperiod And Melatonin Injections On The Reproductive System Of Male Mice, Mus Musculus, Icr Strain, Margaret Ann Shugart

Master's Theses

The reproductive effects of long (24L:OD), natural (14L:lOD), and short (1L:23D) photoperiods were studied in the male mouse, Mus musculus, ICR strain. One third of the mice in each photoperiodic regimen were sacrificed after 45 days. Half of the remaining mice in each regimen received daily melatonin (5-methoxy-N-acetyl tryptamine) injections for 45 additional days. Body weights, testicular and accessory sex organ weights were measured and microscopic examinations of the testes were made. Plasma testosterone levels were determined using radioimmunoassay. Other organ (pituitary, kidney, adrenal, thymus, thyroid) weights were also obtained.


Density And Distribution Of White-Tailed Deer (Odocoileus Virginianus) In Cades Cove, Great Smoky Mountains National Park, Tennessee, Michael Joseph Kiningham Aug 1980

Density And Distribution Of White-Tailed Deer (Odocoileus Virginianus) In Cades Cove, Great Smoky Mountains National Park, Tennessee, Michael Joseph Kiningham

Masters Theses

Three census techniques were used from June 1978 to August 1979 to estimate population densities of white-tailed deer (Odocoileus virginianus) in Cades Cove, Great Smoky Mountains National Park, Tennessee. Roadside counts were conducted 3 times a week; once at dawn, dusk, and dark. Drive counts were made every 3 months and a 3-week sampling interval was used to make pellet counts. Seasonal density estimates ranged from: 0.29 to 0.58 deer/ha (dark counts) , 0.29 to 0.76 deer/ha (drive counts) , and 0.18 to 0.47 deer/ha (pellet counts).

Adult sex ratios obtained from dawn ...


Folate Status In Adolescent Girls, Hugh Wyatt Dawson Aug 1980

Folate Status In Adolescent Girls, Hugh Wyatt Dawson

Masters Theses

This nutrition status survey was conducted at The University of Tennessee, Knoxville in conjunction with a southern regional nutrition project operative in ten sites throughout the southeast. The purpose of this study was to assess folate nutriture of the subjects using both biochemical and dietary indicators. The sample group was comprised of 94 adolescent females 14 ± 0.5 years of age, from two race groups (black and white) and two income categories (≤ $1,200/capita/year and ≥ $2,000/capita/year). Fasting blood was collected and analyzed by radio assay methods for both serum and red cell folate concentrations. Two ...


Comparison Of Three Mass Media For Communicating Forestry Information For Young People, Ross Lee Tomlin Aug 1980

Comparison Of Three Mass Media For Communicating Forestry Information For Young People, Ross Lee Tomlin

Electronic Theses and Dissertations

A comparison of three mass media ( TV, radio and newspaper) was made to find which would be more effective at communicating forestry information to young people. The field study was conducted at Nacogdoches, Lufkin, and Kilgore High Schools in East Texas. Questionnaires given to students before and after exposure to six media spots tested forestry knowledge and attitudes. One spot in each medium presented a hardsell threat approach, the other a softsell-humorous approach. A final questionnaire measured student preferences of the media. Analysis of data indicated newspaper and TV to be the most effective media, with radio less effective. Both ...


A Limnological Investigation Of A Tropical Fresh-Water Ecosystem: The Belize River, Belize, Central America, Victor J. Gonzalez Aug 1980

A Limnological Investigation Of A Tropical Fresh-Water Ecosystem: The Belize River, Belize, Central America, Victor J. Gonzalez

Dissertations

The limnology of the Belize River, from the region of Spanish Lookout to the region of Belize City, was investigated from 1977 through 1979. The investigation was done primarily during the months of May through August, covering the two seasonal changes--wet and dry--that occur in this tropical region. The investigation sought to describe various parameters of the Belize River so as to gain an understanding of this tropical fresh-water ecosystem and to provide basic information needed for the development of management programs.

Water samples were collected from eight stations and analyzed for acidity, alkalinity, carbon dioxide, chloride, sodium chromate, hexavalent ...


Pisolithus Tinctorius Mycobiont Inoculations As A Factor In Performance Of Containerized And Bare-Root Shortleaf Pine Seedlings On Lignite Minesoils In Panola County, Texas, Hoy Lee Bryson Aug 1980

Pisolithus Tinctorius Mycobiont Inoculations As A Factor In Performance Of Containerized And Bare-Root Shortleaf Pine Seedlings On Lignite Minesoils In Panola County, Texas, Hoy Lee Bryson

Electronic Theses and Dissertations

The effects of artificial soil infestation with basidiospores and vegetative mycelia of the fungal symbiont Pisolithus tinctorius on ectomycorrhizae development of short leaf pine (Pinus echinata) seedlings grown in styroblock containers were tested in the greenhouse. These preliminary tests showed that both spores and mycelia will produce satisfactory ectomycorrhizae development. Various methods of inoculation had little effect on growth and development of containerized seedlings or on the accumulation of N, P, K, Ca, Mg, Na, Mn, Zn, or Cu in foliage and lateral roots. The styroblock containerization system used in conjunction with sandy loam soil/vermiculite (2:1 v/v ...


Bedding As A Factor In The Survival And Total Height Of Two Year Old Planted Loblolly Pine Seedlings In East Texas, Edgar Wilkins Aug 1980

Bedding As A Factor In The Survival And Total Height Of Two Year Old Planted Loblolly Pine Seedlings In East Texas, Edgar Wilkins

Electronic Theses and Dissertations

With an ever increasing demand placed on wood fiber supply by industry, it has become imperative that every feasible means be pursued which will increase the wood fiber production per acre of land on every plantsble site. With this in mind, this study was conducted in an attempt to determine the effect of bedding in intensive site preparation on the total height and survival of two year old loblolly pine (Pinus taeda, L.) seedlings planted on bottomland and upland sites. Forty row (or lineal) plots 100 feet long were established on machine planted areas on bedded and unbedded, bottomland and ...


Analysis Of Single Sperm Acrosomal Enzymes In Genetic Toxicology, Steven Craig Johnson Aug 1980

Analysis Of Single Sperm Acrosomal Enzymes In Genetic Toxicology, Steven Craig Johnson

Master's Theses

No abstract provided.


An Analysis Of Salt Eating In Birds, Kathryn Julia Herson Aug 1980

An Analysis Of Salt Eating In Birds, Kathryn Julia Herson

Master's Theses

No abstract provided.


The Possible Influence Of Nestbox Size On Nesting Behavior And Reproductive Success In The House Wren (Troglodytes Aedon), Mary Anne Sydlik Aug 1980

The Possible Influence Of Nestbox Size On Nesting Behavior And Reproductive Success In The House Wren (Troglodytes Aedon), Mary Anne Sydlik

Master's Theses

Recent studies (Lohrl 1973i Karlsson and Nilsson 1977) have shown that there may be a relationship between nestbox size and clutch size in several passerine species. The present study was designed to determine whether nestbox size influences the clutch size and reproductive success of House Wrens (Troglodytes aedon) and to test possible cues a female might utilize to assess the size of a given nestbox. Four types of nestboxes were used in the study; they varied in floor surface from 3 inches by 3 inches to 8 inches by 8 inches. No statistically significant differences in clutch size or reproductive ...


Attentiveness And Time Budget Of A Pair Of Nesting Wood Storks, E. Scott Clark Jul 1980

Attentiveness And Time Budget Of A Pair Of Nesting Wood Storks, E. Scott Clark

Retrospective Theses and Dissertations

An instantaneous sampling system was used to quantify nest attentiveness and time budget of a pair of Wood Storks (Mycteria americana) nesting at the Moore Creek colony on Merritt Island National Wildlife Refuge in 1977. The amount of time devoted to various activities during each stage of the 4-month reproductive cycle was examined and differences between stages evaluated. During the incubation period an adult was constantly at the nest site and the birds shared equally in the incubation duties. During the first four weeks of the 8-week pre-flight nestling stage, an adult was with the chicks continuously, although the adults ...


The Effect Of Colchicine On Sexual Reproduction Of Chlamydomonas Moewusii, Anne Leslie Menoff May 1980

The Effect Of Colchicine On Sexual Reproduction Of Chlamydomonas Moewusii, Anne Leslie Menoff

Biology Master’s Theses

The effect of colchicine on the mating reaction in Chlamydomonas moewusii was investigated. Five mM colchicine was found to cause a 96% inhibition of gamete fusion, without disrupting the preceding agglutination reaction or cell motility. Electron microscope examination of colchicine-treated gametes revealed a 98% inhibition of mating structure activation, suggesting that the drug had rendered the gametes incapable of generating and/or responding to the signal for mating structure activation which normally accompanies sexual agglutination. Light microscope analysis revealed that flagella of adhering drug-treated cells entwined loosely so that treated gametes were unable to establish the flagella tip alignment, and ...


Isoenzyme Patterns And Ultrastructural Changes In Tomatoes Infected With Potato Spindle Tuber Viroid, Eyobong E. Usanga May 1980

Isoenzyme Patterns And Ultrastructural Changes In Tomatoes Infected With Potato Spindle Tuber Viroid, Eyobong E. Usanga

ETD Collection for AUC Robert W. Woodruff Library

The isoenzyme patterns of three enzymes and the ultrastructural changes of Rutgers tomato plants were determined after infection with Potato Spindle Tuber Viroid. Electrophoresis of the protein extract in polyacrylamide gels fol lowed by staining for malate dehydrogenase, esterase, and peroxidase showed that only peroxidase was affected by the infection. Two new bands of the isoenzyme were detected in protein extracts of infected tissues. It is suggested that these bands represent the molecular symptoms of the disease.

Thin sections of diseased tissues examined with the electron microscope revealed cytopathic modifications such as the interruptions of the nuclear membrane, increased vacuolation ...


An Agro-Sylvo-Pastoral Approach To Desertification Control And Increased Productivity Of The Sahel, Rober D. Kirmse May 1980

An Agro-Sylvo-Pastoral Approach To Desertification Control And Increased Productivity Of The Sahel, Rober D. Kirmse

All Graduate Plan B and other Reports

The southern arid fringe of the Sahara Desert, called the Sahel, is progressively becoming less productive through a systematic deterioration of the environment. Population increases and technological advances have encouraged ecological degradation through man's normal activities for survival. The degradation process has been referred to as desertification, desertization, desert encroachment, and desert creep.


A Nutrition Education Component For The High School Health Curriculum, Mary Jane German May 1980

A Nutrition Education Component For The High School Health Curriculum, Mary Jane German

All Graduate Theses and Dissertations

Adolescents, who have been shown to be at nutritional risk, and having poor nutritional knowledge and sporadic eating habits, are in need of comprehensive, sequential nutrition education. The purpose of this study was to develop, implement, and evaluate a nutrition education unit for inclusion in the health education curriculum of secondary schools. The two-week unit which included nutrient density concepts was evaluated in two high schools in Utah.

Data from a mail survey of health educators (n=74) revealed their need for nutrition training and resources, and guidance for integrating nutrition into health classes. High school health teachers were provided ...


Pantothenic Acid Status In An Elderly Population, Nedra K. Christensen May 1980

Pantothenic Acid Status In An Elderly Population, Nedra K. Christensen

All Graduate Theses and Dissertations

There has been insufficient data available for suggesting a recommended dietary allowance for pantothenic acid in the elderly population. The purpose of this study was to determine the average dietary intake of pantothenic acid and correlate it with urinary excretions and the blood levels of this vitamin to assess the pantothenic acid status of the elderly population.

A seven day diet record was obtained from 65 non-institutionalized and 26 institutionalized persons over 65 years of age assessed to be free of chronic diseases. A 24 hour urine specimen and a fasting blood sample was obtained from each study participant. An ...