Digital Commons Network^™

The Effect Of Pimozide And Apomorphine On Dopamine-Induced Renin Release, Tissue Renin Content, And 3'5'-Adenosine Monophosphate Levels In Rat Venal Cortical Slices, Visalakshi Rao

Master's Theses

No abstract provided.

Sequential Ultrastructural And Histochemical Alterations Associated With Atresia Of The Preovulatory Follicle In The Rat, Mary Cristine England-Charlesworth

Master's Theses

No abstract provided.

The Chronic Effects Of Estradiol Benzoate On Ventricular Myocardial Blood Flow In The Adult Female Rat, Stephen Maurice Ashe

Theses and Dissertations

Clinical and experimental data suggest that humans and some animals are protected from acute myocardial infarction by estrogen. There has been much speculation of the exact role which estrogen plays in the circulation. The mechanism of this hormonally related protection is unclear.

In the present study the chronic effects of estradiol benzoate on coronary blood flow in adult female rats were studied. Female control rats, castrates and castrates receiving estrogen for a period of 16 weeks were used. In vivo tracer microsphere studies of myocardial blood flow allowed the quantification of the effects of estrogen on coronary circulation. Results of …

Comparison Of Electron Microscopy And Immunoelectron Microscopy With The Enzyme-Linked Immunosorbent Assay For The Detection Of Rotavirus And Antibody To The Virus, Maria Del Carmen Monedero

Biology ETDs

Rotavirus has been shown to be an etiological agent of acute gastroenteritis, in human infants and children and in young animals, such as mice, calves, lambs, and pigs. Bovine, porcine, simian (SA-11) rotaviruses and the “0” agent (sheep, goat) have been cultivated in cell cultures. To date the human rotavirus has been propagated only in fetal intestine organ cultures, where it has lost infectivity after a few passages. For this reason, methods of detection of the human rotavirus and serological tests for antibodies to it have been difficult to develop. At the present time there are several techniques that are …

Distribution Of Plutonium In Beagle Dog Liver, Jeffery M. Gearhart

Biology ETDs

Plutonium that reaches the systemic circulation by inhalation, ingestion or through cuts or abrasions is preferentially deposited in the liver and bone. Liver cancer may be an important late effect of this deposition. This study was designed to provide improved quantita­tion of the distribution of plutonium deposited in liver as a result of gradual introduction into the blood by absorption from the lung, com­pared with the immediate introduction by intravenous injection of a soluble form. In this study, Beagle dogs were exposed to an aerosol of ²⁸⁰Pu0₂ or an intravenous injection of ²³⁸Pu or ²³⁹Pu-citrate. Animals …

Review Of "Case Studies In Genetics" By M. A. Tribe, I. Tallan, And M. R. Eraut, John B. Jenkins

Biology Faculty Works

No abstract provided.

The Effects Of Pre And Postnatal Gonadal Hormone Administration On The Adult Aggressive-Target Biting In Female Mice, David D. Smith

Masters Theses

Introduction

It is now well established that androgens and estrogens are intricately involved in influencing the sexual differentiation of the brain, as well as male and female differences of aggressiveness. Evidence is accumulating which indicates that these steroid hormones influence the pattern of nervous connection and organization developing in utero and in the early postnatal period.

To more completely link testosterone's involvement with aggressive behavior, one must examine the voluminous literature which links testosterone with developing neonatal correlates of aggression as well as with adult capacity to display aggressive behavior. In most species the male is more aggressive than the …

Small Mammal Population Dynamics And Community Structure In Three East Central Florida Communities, Mary Helen Keim

Retrospective Theses and Dissertations

Small mammal population dynamics and community structure were studied in three East Central Florida communities. The communities were compared as distinct stages of a sand pine scrub sere. The small mammals live-trapped with greatest frequency in this 3852 trap-night study were all cricetine rodents, Peromyscus polionotus niveiventris (beach mouse), Sigmodon hispidus littoralis (cotton rat), and Peromyscus gossypinus palmarius (cotton mouse). Population numbers, survival, body weights, hind foot lengths, age structure, sex ratios, reproductive cycles, and movements were discussed for each of three species mentioned. These data will serve as a baseline information for ecological monitoring studies associated with NASA Space …

Danazol As A Steroid Enzyme Inhibitor In Rat Adrenal Glands, Frank A. Miklavcic

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Frank A. Miklavcic on August 1, 1979.

A Study Of Schistosomiasis In The Mizurata Area, Libya, Abubaker I. Swehli

Masters Theses

No abstract provided.

Growth And Food Habits Of Micropterus Salmoides In Westhampton Lake, Richmond, Virginia, Charles H. Rawls Jr.

Master's Theses

Age, growth, and food habits of the population of Micropterus salmoides (largemouth bass) in Westhampton Lake were studied from September to November 1978. Two year classes (0 and I) were identified by determining numbers of annuli on the scales of the fish. Growth data indicated that the bass attain a size of 254 mm (10 in.) near the end of their second summer. The length-weight relationship was log W = -4.6829 + 2.9153 log TL. The Fulton condition factor for the population was 1.40. Food habits were described by numerical and frequency of occurrence methods. Young of the year sunfish …

The Interacting Effects Of Tetraiodothyronine And Epinephrine On The Activities Of Na+ + K+ -Dependent Adenosine Triphosphatase, Hexokinase And Pyruvate Kinase In The Cardiac Tissue Of White Rats, Timothy Joseph Dietrick

Master's Theses

The interacting effects of tetraiodothyronine (T4) and epi- nephrine on Na++K+-dependent ATPase, hexokinase, and pyruvate kinase in cardiac tissue of white rats were investigated in an attempt to elucidate the hormonal regulation of heart metabolism. Previous evidence has shown that 90% of the increase in oxygen consumption exhibited by hyperthyroid rats was due to an activation of Na++K+- dependent ATPase. In addition, hypothyroidism in sheep was re­ ported to lower cardiac Na++K+-dependent ATPase activity as well as 8-adrenergic binding sites for epinephrine. As T4 and epinephrine enhance carbohydrate metabolism, hexokinase and pyruvate kinase, two essentially irreversible glycolytic enzymes, were also …

A Study Of The Comparative Effectiveness Of Different Methods For The Induction Of Pseudopregnancy In The Mouse, Ricky E. Collins

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Ricky E. Collins on August 1, 1979.

Plant Response To The Barstow To Las Vegas Motorcycle Race Of November, 1974, Candace E. Horsley

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study was to determine the disturbance spectrum of the perennial plant vegetation by the Barstow to Las Vegas motorcycle race. Transects were taken at the pit area, starting line, and at various locations along the race course. Measurements were also taken in undisturbed control sites near the test areas, the topographic and bio tic features being judged as equal. Methods employed consisted of aerial photograph analysis just before and after the race. On site ground measurements were taken four years after the 1974 motorocycle event. Measurements of diversity, stability, productivity, and community quality were calculated. The …

Distributional Ecology Of Vegetation In The Vernal Pools Of The Santa Rosa Plateau, California, John A. Rosario

Loma Linda University Electronic Theses, Dissertations & Projects

Interpool distribution studies of 10 vernal pools on the Santa Rosa Plateau found area to be the best single predictor of species richness in each type of regression model evaluated. Area predicted most accurately in a mixed linear-curvilinear regression model (y = a + b log x). Area appeared to reflect ecologic diversity, because multiple linear regression models provided better predictions of species richness using combinations of physical characteristics which excluded area from the regression equation. In addition, species turnover was demonstrated in a single vernal pool that was evaluated.

Intrapool distribution was studied along a soil moisture/microtopographic gradient in …

Agar Plate Culture Of Selected Trypanosomatidae, Amy Doran Keppel

School of Biological Sciences: Dissertations, Theses, and Student Research

Summary

The study of trypanosomatid biology would benefit greatly from the acquisition of a tool for culturing such as those used in microbiology. Agar plate culture has been described several times, but until the present its potential for use in this area has been underestimated. The previous work has demonstrated that this culture method may be used to culture a wide variety of species, that these species give rise to identifiable colony phenotypes, and that these are stable regardless of the life cycle stage used to initiate the culture. It was also shown that colonies could be initiated from the …

The Reproductive Biology Of The Diamondback Terrapin, Malaclemys Terrapin Tequesta, Richard A. Seigel

Retrospective Theses and Dissertations

The reproductive biology of the Florida east coast terrapin, Malalemys terrapin tequesta was studied during 1977-1978 at the Merritt Island National Wildlife Refuge, Brevard County, Florida. Mating occurred in small canals and ditches during late march and April. Terrapins exhibited a poorly developed courtship behavior system: this was attributed to the relative isolation of the species due to its brackish water habitat. Nesting occurred on dike roads, rather than on sand dunes as reported for other races of Malaclemys. Air temperature was the most important factor controlling nesting activity. One to three clutches were laid each year. Malaclemys appeared to …

Cytotoxic Effects Of Vanadium On Pulmonary Alveolar Macrophages, Crystal Joy Sheridan

Biology ETDs

Particles containing vanadium are emitted into the air from fuel oil and coal combustion, and may be inhaled by man. Because such particles are within the respirable size, vanadium may be deposited in the alveolar region of the lung and come into contact with the pulmonary alveolar macrophage. In order to evaluate vanadium cytotoxicity, pulmonary alveolar macrophages were lavaged from dogs, rabbits and rats and then incubated with various concentrations of vanadium pentoxide. The minimum vanadium pentoxide concentration which reduced cell viability from control was 1 mg/m1 for dog macrophages, 2.5 mg/ml for rabbit macrophages and 10 mg/ml for rat …

Isolation And Identification Of Yeasts From The Barren River, Richard Vanenk

Masters Theses & Specialist Projects

The Barren River was sampled twice monthly for one year to obtain data on aquatic yeasts. Sites upstream and downstream of the Bowling Green sewage plant, as well as the sewage effluent, were sampled to ascertain if the effluent had any effect on the yeast population of the river. Sporadic yeast counts were obtained which averaged 40 CFU/ml for the effluent, while the river averaged 15 CFU/ml. A total of 318 yeasts were isolated and identified during the study, including 16 different genera with Cryptococcus being the most common. Cryptococcus laurentii occurred most frequently of the 67 different species identified. …

Concomitant Infections With The Parasites Trypanosoma Musculi Kendall, 1906 And Trichinella Spiralis (Owen, 1835) Raillet, 1896 In The Laboratory Mouse, Musmusculus, Joan Chew Liang Tan

Loma Linda University Electronic Theses, Dissertations & Projects

Four groups of female Swiss Webster mice were injected intraperitoneally with similar volumes of normal saline, sonicated Trypanosoma musculi and saline, sonicated trypanosomes and Freund's Complete Adjuvant (FCA) and FCA. When the mice became immune and thus responded negatively to a T. musculi challenge, sera were collected and administered to four other groups of mice to establish passive immunity in these animals.

An established dose of innoculum of Trichinella spiralis larvae (8.1 larvae/gram of body weight) was given to all the mice by gastric gavage. These mice were killed 26 days later and the musculature digested with artificial gastric juice …

The Effect Of Rutin On Swine Serum Cholesterol And Lipoproteins, Jimmy R. Salyer

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Jimmy R. Salyer on May 8, 1979.

The Effect Of Quercetin-3-B-Rutinoside On Blood Coagulation And The Development Of Atherosclerotic Lesions In Swines, Milford C. Jarrells

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree on Master of Science in Biology by Milford C. Jarrells on May 8, 1979.

Androgen-Induced Immunosuppression, Debra Ann Weyant

Dissertations and Theses

It is well established that females are more immunocompetent than males as evidenced by higher humoral antibody titers, lowered susceptibility to infection, and more efficient graft rejection.

Furthermore, females also exhibit a much higher incidence of autoimmune disease. These observations have led investigators to believe that the male hormonal environment may play a key role in the regulation of immune response. For this reason, this study is concerned with the expression of autoimmunity and of immune function in the mouse.

This study included the New Zealand Black (NZB) mouse strain, as an animal model for human SLE, as well as …

Front Matter, Elephant Editors

Elephant

Table of Contents and Cover credits

Observations In Tsavo National Park, Kenya, Evans E. Mgaah

Elephant

Personal observations from four years as a game ranger in Tsavo National Park, Kenya.

Captive Elephant Population Of North America: 1979 Update, Elephant Editors

Elephant

Survey of elephants in captivity, 1979.

Observations Of Elephants In East And Southern Africa, Jeheskel Shoshani

Elephant

Selected short observations on African elephants (Loxodonta africana) made during 1978 in East and Southern Africa.

Iucn/Wwf Help Wanted, Elephant Editors

Elephant

A published plea from the IUCN/World Wildlife Fund Conservation Programme in Indonesia asking for information regarding endangered elephants in Sumatra.

Ecotypic Differentiation Of Andropogon Virginicus L. In Relation To Strip Mine Spoil Banks, Valina Kay Hurt

Masters Theses & Specialist Projects

Reciprocal plantings of populations of broomsedge, taken from an abandoned strip mine and from an abandoned farm plot in south central Kentucky, on strip mine spoil and abandoned field soil resulted in patterns of populations differentiation. Clonal plantings of populations from strip mine habitats and old field development appeared equal in height and biomass when grown on old field soils in both field trials and growth chamber studies. Populations when planted in strip mine soils in field trials and controlled growth experiments. Later flowering in strip mine populations may be a key to survival strategy in the harsh microclimates of …

The Early Life History Of The White And Black Crappie In Rough River Lake, Kentucky, Gary Overmann

Masters Theses & Specialist Projects

Crappies spawned in Rough River Lake from April 29 to July 9. Larvae were first collected on May 3 when the lake temperature reached 17 C. A total of 7369 crappie was taken from may 3 to August 1. The maximum number of crappies occurred from May 30 to June 20. The developmental chronology was described for specimens 4.75 mm to 29 mm total length. Meristic characters averaged 10.8 for preanal myomere count, 21.1 for postanal myomere count, 31.9 for total myomere count and 0.62 for preanal length to postanal length ratio. Densities of larvae were low early in the …