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The Passage Of Las Across The Teleost Chorion And The Mouse Placenta, Annabella Juhasz

Master's Theses

No abstract provided.

An Ultrastructural Study Of Prostaglandin F₂Α -Induced Alteration Of The Corpus Luteum Of Early Pregnancy Of The Icr-Cd1 Strain Of Mice, Marilyn Miller

Master's Theses

No abstract provided.

Electron Microscopic Study Of The Perivascular Region Of The Pineal Gland Of The Early Post-Hatching Domestic Fowl With Emphasis On Exogenously Produced Lymphocyte Emigration, Christopher N. Casciano

Master's Theses

No abstract provided.

Histological Evaluation Of Gingiva In Complete Crown Restorations, Meera Mahajan

Master's Theses

No abstract provided.

Demography Of A Barrier Island Population Of The Keeled Earless Lizard, Holbrookia Propinqua, Frank W. Judd

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

No abstract provided.

Corticosterone Levels And The Critical Period In Imprinting Behavior Of Domestic Chicks, Lorraine Feldman

Biology ETDs

The following research was undertaken to monitor a glucocorticoid corticosterone to determine whether or not a reduction in glucocorticoids occurs during the critical period of imprinting behavior. Two groups of domestic chicks (Schaffer white Leghorns) were incubated, hatched and maintained under brooding conditions prior to imprinting procedures. Chicks were first divided into seven age groups, four hour intervals, beginning at hatching. The critical period of imprinting behavior was established with Group I. Success of imprinting training in this group was tested 24 hours after the training sessions. The second group provided blood samples taken after imprinting training sessions; they were …

Radio-Telemetry Of Body Temperature Of Prairie Dogs, Cynomys Ludovicianus, And Response Of Isolated Perfused Hearts To Temperature, Trent H. Thomas

Biology ETDs

The black-tailed prairie dog, Cynomys ludovicianus, was described by the early naturalists and explorers as inhabiting an area ranging from southern Canada to northern Mexico. Although their habitat varies in environmental extremes, little is known of the physiological responses of this species. Most investigations concerning them have dealt with their possible role as disease vectors, their effects on agriculture and livestock management, and the structure of their social organization. The purpose of the following studies is to contribute to the basic knowledge of the physiological responses of Cynomys ludovicianus. The experiments include radio-telemetering of body-core temperatures at low ambient temperatures …

The Study Of The Pathology Of The Middle One Third Of The Small Intestine Of The Spontaneously Diabetic Chinese Hamster, Patrick Murray

Masters Theses

No abstract provided.

Growth Lines In Chione Fluctifraga And Prothaca Staminea (Bivalvia): Precision Of Counting And Comparisons Of Size, Age, Intertidal Location And Taxa, David M. Crabtree

Loma Linda University Electronic Theses, Dissertations & Projects

Because formation of growth lines in the shells of bivalve molluscs is affected by environmental parameters, the growth lines should contain much information about the environments in which the animals live. However, the use of growth lines in ecology· and paleontology is limited by ambiguity in their identification.

Chione fluctifraga and Protothaca staminea were collected, marked, and replanted. C. fluctifraga were grown at three intertidal levels over a vertical range of one meter. In addition, P. staminea were grown at the middle level. All specimens were re-collected after 47 days. Acetate peels of shell cross sections were use for growth …

The Effect Of 900 Hz And 1200 Hz Audible Sound On The Germination And Development Of Seeds Of Oats, Wheat And Cucumber, Augustina Gyimah

Masters Theses

No abstract provided.

The Role Of The Suprapharyngeal Ganglia In Regulation Of Oxidative Metabolism In The Intestinal Mitochondria Of Lumbricus Terrestris, Raymond H. Fetterer

Masters Theses

No abstract provided.

Populations Of Lepomis Auritus (Redbreast Sunfish) In A Thermally Influenced Section Of The James River, Virginia, John Rawls Saecker

Master's Theses

From October 1971 - September 1973, electrofishing was used to collect 1004 specimens of Lepomis auritus (year classes 0 - V) from a thermally influenced section of the James River near Blemo Bluff, Virginia. Collections of fish from the natural and heated water temperature habitats were analyzed as to year classes, season, length and sex.

The Effects Of Topical Nitrogen Mustard On The Pigment System In Pet/Wmr Mouse Epidermis, Ronald Lee Salisbury

Master's Theses

Miniature melanocytes have been observed scattered among the typical melanocytes in the skin of the PET/Wmr mouse strain, They are weakly DOPA reactive and their cell bodies and nuclei are one quarter the size of those in typical melanocytes, Both populations reach a peak during the first postnatal week and then gradually disappear within the following three weeks. The miniatures appear very early and are among the last cells to disappear. During the first postnatal week, their population remains relatively constant against a radically changing population of typical melanocytes. That they may represent a stage in the development of typical …

Effects Of Hypobaric Hypoxia On Serotonin In Mouse Brain, Jacob Dale Peuler

Masters Theses

No abstract provided.

Effects Of Antifibroblast Antiserum On Cells Derived From Fibroblast Outgrowth Of Human Prostatic Tissues, Eva Shang-Lian King

Dissertations and Theses

The purpose of this investigation was to provide pure cultures of normal human prostatic epithelium free of fibroblasts in order to study malignant conversion by chemical carcinogens. Normal epithelial cells were needed because this was the cell type implicated in prostatic malignancies of human subjects. Unfortunately fibroblasts grew faster than epithelial cells so that cultures were always overgrown with connective tissue elements. It was considered important to find a method which would eliminate fibroblasts so that normal epithelial cells could grow out in pure culture.

Stability Of Small Unisexual-Bisexual Populations Of Poeciliopsis (Pisces: Poeciliidae), William S. Moore

Biological Sciences Faculty Research Publications

All-female species of Poeciliopsis depend upon ♂ ♂ of closely related species for sperm. This relationship creates a competitive situation in which bisexual ♀ ♀ compete with unisexual ♀ ♀ for sperm from ♂ ♂ of the bisexual species. Earlier studies demonstrated a sufficient mechanism inherent in the behavior of ♂ ♂ for allowing coexistence in mixed unisexual-bisexual populations. Courtship preference of ♂ ♂ for conspecific ♀ ♀ is dynamically countered by social interaction among ♂ ♂ : subordinate males mate with unisexual ♀ ♀ in impetuous courtships. The Poeciliopsis monacha-Poeciliopsis 2 monacha-lucida complex occurs naturally in small isolated populations …

Comparative Bioenergetics Of Insects From Young & Old Plant Ecosystems, Joyce Wright

Masters Theses & Specialist Projects

Caloric values of insects and arachnids from two woods and two meadow ecosystems were compared. No significant difference was found between the orders Diptera, Homoptera, Orthoptera, Hemiptera, Hymenoptera, or Coleoptera. Caloric values of the class Arachnida were significantly higher in the woods ecosystem at the .05 level of significance. The order Lepidoptera differed at the .01 level of significance and was also higher in the woods samples. For all orders combined the caloric values of the woods samples were higher than the meadow samples at the .001 level of significance.

No consistent pattern was found in seasonal variation in caloric …

The Life History Of The Teardrop Darter, Etheostoma Barbouri Kuehne And Small, In Kentucky, Rory Flynn

Masters Theses & Specialist Projects

The life history of the teardrop darter, Etheoctoma (Catonotus) barbouri Kuehne and Small, was intensively studied from September, 1972, through August 1973. A total of 299 teardrop darters was seined from two isolated populations in Alexander and Little Muddy Creeks, Kentucky. These darters are known only to occur in second, third or fourth order tributaries of the Green River in Kentucky and Tennessee, and normally seek protection afforded by rocky or vegetated edges of such streams.

Gonosomatic ratios indicated that teardrop darters spawned from late March through late May in waters 12.5 - 15.5 C. Young females developed primary ova …

Interactions In The Frequencies Of Electric Organ Discharge By Eigenmannia Virescens (Sternopygidae, Pisces) During Social Behavior, Philip Gaddis

Dissertations and Theses

The extent to which individuals of Eigenmannia virescens modulate their electric organ discharge frequencies to accommodate the frequencies of others of the same species during social interactions was investigated. Recordings of the fish's discharge frequencies, taken with Tektronix 3L5 and 5L4N spectrum analyzers, showed that, although movements of up to 60 Hz in a day may be made, the frequency movements would be made more or less synchronously by all fish in the group. An apparent preference for, and a tendency of the fish to follow one another in frequency, at frequency ratios of 2:3 (a musical fifth), 3:4 (fourth), …

The Effects Of Heat And Co-60 [Gamma]-Radiation On The Oocysts Of Eimeria Nieschulzi, George A. Conder

Biology ETDs

Sporulated oocysts of Eimeria nieschulzi Dieben, 1924, a rat coccidium, were exposed to radiation, to heat, or to both in an effort to attenuate the parasite. In addition, studies were conducted on the excystation capabilities and infectivity of treated sporozoites and on their immunogenic potential. These observations were correlated with the immune response of the host. Treatments had no effect on oocyst structure but altered the excystation process and decreased the percentage of sporozoites capable of excysting. Moderate levels of radiation, of heat, or of both radiation and heat attenuated the parasite, reduced pathological effect (as judged by oocyst discharge …

Lethatlity Of And Elicitation Of Protective Antibody By Vibrio Parahaemolyticus Attc 17803, Richard Carlucci

Masters Theses & Specialist Projects

The LD₅₀ of Vibrio parahaemolyticus ATCC 17803 for 13- to 18-g male mice, strain ICR, as determined by the 50% endpoint method, was found to be an estimated 7 x 10⁷ CFU, when administered intraperitoneally in 0.5 ml of 24-h broth culture, O. D. 0.5 at 650 nm, diluted to 10^-0.72.

The elicitation of protective antibody by this bacterium in male New Zealand White rabbits was demonstrated by testing control, baseline, and hyperimmune rabbit sera for their protective effect against 2 LD₅₀ of the bacterium administered intraperitoneally in 13- to 18-g male mice, strain ICR. …

Effects Of Photoperiod, Temperature And Preconditioning On The Molt Cycle Of Samples From A Michigan Population Of Orconectes Immunis (Hagen), Robert Van Hoff

Masters Theses & Specialist Projects

Immature Orconectes immunis were obtained from Michigan in August, 1973, and July 1974 to determine the effects of photoperiod and temperature on the molt cycle of the crayfish and to test the effects of preconditioning on this species at a cold (7C) temperature from 45 to 90 days. Two sets of 3 experiments were conducted, each involving photoperiod, temperature and preconditioning. The first experiment of each set was initiated within a day after bringing the animals from the field, the subsequent two experiments of each set being initiated at 45-day intervals thereafter.

There were significant responses to photoperiod among the …

Effects Of The Toxins Of The Ectoproct, Lophopodella Carteri, On Oxygen Consumption In Gill Tissues Of The Bluegill, Lepomis Macrochirus, Barbara Harper Green

Master's Theses

Large and small bluegill, Lepomis macrochirus, were exposed to homogena tes of Lophopodella carteri, an ectoproct that contains substances toxic to some gilled vertebrates. Oxygen consumption tests on the excised gill tissues of the bluegill indicated that the ectoproct toxins caused a lowering of oxygen consumption of the gill tissues. Oxygen consumption of the gill tissues of the smaller fish was reduced to a greater extent than that of larger fish. An inverse relationship was found be tween the temperature of the medium and the period of time for death to occur. It is proposed that the toxins cause physiological …

Respiratory Metabolism And Energy Requirements Of Embryo, Larval And Juvenile Mountain Whitefish, Prosopium Williamsoni, Pokkavil Karunakara Rajagopal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The upper optimum temperature for embryonic development of mountain whitefish is 6 C, and for the post yolk sac stage is 9 to 12 C. The need to know effects on all stages in the life cycle in cases of thermal pollution is demonstrated. Abnormalities caused by thermal pollution in hatched larvae were agape jaws, coloboma or fissure of the eye, monophthalmia or the presence of only one eye, monomicrophthalmia or the presence of one small eye and one case of twinning. High mortalities of eggs occurred at 9 C and higher.

Study of the energy expenditure, by the dry …

Dispersion Of The Host Specific Phytophagous Insects Of Duncecap Larkspur (Delphinium Occidentale) In The Wasatch Mountains Of Utah, Robert L. Bayn Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Populations of Delphinium occidentale (Ranunculaceae)were monitored over two summers for the presence and dispersion of various life stages of several host specific phytophagous insects. Observations were made at several sites in the Wasatch National Forest east of Logan, Utah. Two species of larkspur aphid (Aphis rociadae and Kakimia wahinkae) were encountered. Although dispersal of alate individuals resulted in widespread infestation of the host plant population, aphids occurred initially on the same one or few plants at each site both springs. Little coexistence of the two species of aphid on the same plant was observed, perhaps because they partitioned …

In Situ Nitrogen Fixation In Cold Desert Soil-Algae Crust In Northern Utah, Darwin Levoy Sorensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nitrogen fixation, as measured by the acetylene-ethylene assay, in the surface soils of southern Curlew Valley, Utah-Idaho was studied. The removal of nitrogen from the surface soil by precipitation runoff water was also studied, and the role of the soil-algae crust in preventing erosive loss of nitrogen was evaluated.

Nitrogen fixation during the study year was estimated to be less than 10 kg/ha. This level is probably sufficient to maintain steady-state on an annual basis in standing crop nitrogen in this environment.

Well structured, lichenous crusts had improved infiltration of precipitation and lowered erosive loss of nitrogen. Poorly structured and …

Regulation Of Rabbit Testicular Capsular Motility: The Interaction Of Prostaglandins, Acetylcholine And Sympathomimetic Agents, James L. Hargrove

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The regulation of the contractility and intratesticular pressure of rabbit testes was studied. The effects of, and interactions among, prostaglandins (PGs) E₁ and F_2α testosterone, acetylcholine, epinephrine and norepinephrine were ascertained both in vitro and in vivo. All of these compounds, except for high concentrations of PGE₁ and testosterone, stimulated the testicular capsule to contract. PGE₁ at low concentrations potentiated the contractions produced by epinephrine and acetylcholine. Above 10^-7M, PGE₁ inhibited contractions caused by PGF_2α epinephrine or acetylcholine. Testosterone inhibited contractions caused by PGF_2α in vitro.

Preinjections of rabbits …

Monoamine Oxidase As A Target Enzyme In Pineal And Testicular Tissue: Adrenal Cortical Steroids And Arginine Vasotocin, Randall James Merrill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of the research was twofold: (a) To ascertain what effects the adrenal glucocorticoids and catecholamines have on pineal N-acetyltransferase and monoamine oxidase activity, and (b) to observe what effect arginine vasotocin (a pineal polypeptide) has on testicular monoamine oxidase activity.

Rat pineal N-acetyltransferase activity was numerically increased when rats were injected with cortisol. It was increased significantly when the animals were injected with cortisol plus norepinephrine. Adrenal demedullation significantly increased N-acetyltransferase activity in starved rats when compared with intact control animals. Moreover, bovine pineal monoamine oxidase activity was markedly inhibited in a dose-dependent manner when incubated in vitro …

The Effect Of Audible Sound On The Germination And Root Elongation Of Selected Seedlings, Micheal Dennis Walton

Masters Theses

No abstract provided.

Phosphorylated Β-Guanidinopropionate As A Substitute For Phosphocreatine In Rat Muscle, Coy D. Fitch, Max Jellinek, Robert H. Fitts, K. M. Baldwin, J. O. Holloszy

Biological Sciences Faculty Research and Publications

To evaluate phosphorylated β-guanidinopropionate (β-GPAP) as a substitute for phosphocreatine (PC), hypoxic tibialis anterior muscles were stimulated to contract isometrically in situ until twitch tension fell to 25% of the peak value. Muscles from rats fed β-guanidinopropionic acid (β-GPA) failed to exhibit the staircase phenomenon, and they developed 28% less tension than control muscles. In control muscles lactate increased from 0.75 to 20.99, ADP increased from 0.89 to 1.20, ATP decreased from 5.09 to 2.73, and PC decreased from 15.78 to 1.52 μmol/g. In muscles from rats fed β-GPA, lactate increased from …