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A Biotic Analysis Of The Dobbs Park Natural Area With Emphasis On Spatial Distribution Of Trees In The Old-Growth Forest Section, Ronald L. Helms

All-Inclusive List of Electronic Theses and Dissertations

Dobbs Park is a 105-acre tract, located at the east edge of Terre Haute, Indiana. Community types range from grass-forb to a 14-acre mature deciduous forest. The tract was divided into 36 units from which 14 community types were developed. The large number of community types appears to be a product of discontinued tillage or grazing within various sections of the tract at different times. The mature forest is largely upland depressional, much of which is subject to periodic pending. Dominants among the 34 tree species present are elms (Ulmus americana, rubra and thomasii) and ashes (Fraxinus americana and pennsylvanica) …

Peter J. P. Whitehead Review Of Spencer Wilkie Tinker, Fishes Of Hawaii, Peter J. P. Whitehead

Pacific Studies

No abstract provided.

Morphology And Distribution Of Petiolar Nectaries In Ipomoea (Convolvulaceae), Kathleen H. Keeler, Robert B. Kaul

School of Biological Sciences: Faculty Publications

The distribution of petiolar nectaries in 24 species of Ipomoea was investigated. Petiolar nectaries were found on 12 species (8 new reports, 4 confirmations of previous reports) and quoted from the literature as being found on 3 other species; they were absent from 9 species investigated. The structure of petiolar nectaries in the genus ranges from simple beds of superficial nectar-secreting trichomes (1 species), to slightly recessed "basin nectaries" (8 species), to "crypt nectaries," which are structurally the most complex extrafloral nectaries known (3 species). (Structures were not determined for 3 species.) Petiolar nectaries are present in all subgenera, but …

Distribution And Natural History Of Amphibians And Reptiles In Western Nebraska With Ecological Notes On The Herpetiles Of Arapaho Prairie, Royce E. Ballinger, John D. Lynch, Patrick H. Cole

Papers in Herpetology

Introduction: The distribution and natural history of amphibians and reptiles have been little studied in the northern states of the great plains. Relative to other vertebrate groups, the herpetofauna of grasslands is depauperate particularly at higher latitudes where temperature becomes a limiting factor to poikilotherms. Nevertheless, certain species of amphibians and reptiles are common in specific habitats and thus form a conspicuous component of the prairie fauna. The purposes of the present study were to document the distributions of herpetiles in a specified region of western Nebraska and to describe general aspects of their natural history. We hope such information …

Isolation Of Radiation-Resistant Bacteria Without Exposure To Irradiation, Scott Sanders, R. Burt Maxcy

Department of Food Science and Technology: Faculty Publications

Resistance to desiccation was utilized in the selection of highly radiation-resistant asporogenous bacteria from non-irradiated sources. A bacterial suspension in phosphate buffer was dried in a thin film at 25°C and 33% relative humidity. Storage under these conditions for 15 days or more reduced the number of radiation-sensitive bacteria. Further selection for radiation-resistant bacteria was obtained by irradiation of bacteria on velveteen in the replication process, thereby avoiding the toxic effect of irradiated media. The similarity of radiation resistance and identifying characteristics in irradiated and non-irradiated isolates should allay some concerns that highly radiation-resistant bacteria have been permanently altered by …

The Prairie Naturalist Volume 11, Number 3. September 1979

The Prairie Naturalist

DISTRIBUTION AND NATURAL HISTORY OF AMPHIBIANS AND REPTILES IN WESTERN NEBRASKA WITH ECOLOGICAL NOTES ON THE HERPETILES OF ARAPAHO PRAIRIE ▪ R. E. Ballinger, J. D. Lynch and P. H. Cole

AVIAN MORTALITY FROM A SEVERE HAIL STORM ▪ J. L. Piehl

EFFECTS OF A SUMMER STORM ON BIRD POPULATIONS ▪ D. H. Johnson

SEXING AND AGING CRITERIA FOR THE WHITE PELICAN ▪ G. R. Lingle and N. F. Sloan

CANVASBACK DUCK RECOVERS FROM COMPOUND LUXATION TO WING ▪ H. A. Doty

SECOND NORTH DAKOTA RECORD OF LOUISIANA WATERTHRUSH ▪ C. A. Faanes

FIRST NESTING RECORD OF A LOUISIANA HERON …

Heating-Effect Minimization In Dye Lasers, Kenneth Lee Matheson, James M. Thorne

Faculty Publications

Optical pumping of dye lasers deposits heat nonuniformly in the active medium. Because the refractive index of a liquid or gas is a function of temperature, gradients are created which refract the laser beam. This effect is sometimes serious enough to quench laser action. In this paper, we evaluate the effects caused by optical pumping with a coaxial flashlamp and suggest ultraviolet absorbers and wavelength shifters as materials for minimizing the problem

Specialized Insectivory: Beetle-Eatinga Nd Moth-Eating Molossid Bats, Patricia W. Freeman

University of Nebraska State Museum: Mammalogy Papers

The structure and mechanics of insectivores have been little studied. An effort is made here to compare and contrast jaw characteristics of insectivorous bats with those of herbivores and carnivores. Further, in one particular family of bats (Molossidae) jaw modifications are such that animals that take hard-shelled insect prey can be distinguished from those that take soft-shelled insect prey. Beetle-eaters generally have thick jaws, well-developed cranial crests, and fewer but bigger teeth, whereas moth-eaters have thin jaws, little crest build-up, and more but smaller teeth.

The Interaction Of Nutrition And Infection: A Succinct Review, Clarence Lee, Georgiana Aboko-Cole

Department of Biology Faculty Publications

Malnutrition combined with susceptibility to infection threatens the health and survival of a large portion of the world's population. Of the many components of the host-parasite relation, nutrition has not received the attention it deserves. There has been increasing activity in recent years on the elucidation of the role nutritional factors play in the behavior of both host and parasite.This paper reviews the effects vitamins exert on the course of parasitic infections.

Analysis Of Tartaric Acid In Fermentation Broth, Lih-Jen Leu

Masters Theses & Specialist Projects

Tartaric acid accumulation in fermentation broth of Gluconobacter suboxydans was investigated qualitatively with paper chromatography and thin-layer chromatography. Comparisons were made using six different solvent systems and four different chemical indicators commonly used in chromatography.

Attempts were made to establish a routine method for quantitative analysis of tartaric acid. Spectrophotometry was used to detect possible metabolites resulting from glucose oxidation by G. suboxydans in different analytical separations. A combined method of ion-exchange column chromatography and paper chromatography followed by ammonium meta-vanadate spectrophotometric analysis differentiated 5-oxogluconic acid and tartaric acid and thus gave better quantitative results in the determination of tartaric …

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.

Kentucky Warbler (Vol. 55, No. 3), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Agricultural Experiment Station News August 1979

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE ACTING DIRECTOR'S DESK
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - July 1979
BULLETINS PRINTED

Atmospheric Forcing Of The Bight Of Abaco, Peter M. Smith

HCNSO Student Theses and Dissertations

No abstract provided.

Simulation Studies Of Corn Hybrid-Climate Response In Nebraska, R. E. Neild, N. H. Richman

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Crop development models can be used to determine the expected phenological responses of corn hybrids to different planting dates and locations. The number of days from planting to maturity for a particular hybrid varies considerably between different dates of planting at a single location and between locations at the same planting date.

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 …

The Plant Tension Zone In Michigan, Margaret Thompson Mccann

Masters Theses

No abstract provided.

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.

Effect Of Lacto-Ovo And Total Vegetarian Diets On Serum, Urinary And Fecal B₁₂ Levels, Cathleen D. Throssell

Loma Linda University Electronic Theses, Dissertations & Projects

Serum, urinary and fecal levels of ten lacto-ovo-vegetarians and nine total vegetarians were assayed using Ochromonas malhamensis. Intakes of vitamin B₁₂ , protein, fat, carbohydrates, fiber and calories were calculated using 7-day diet histories and questionnaires. Correlations between nutrients consumed, years on diet, serum, urinary and fecal B₁₂ levels were also calculated.

Mean serum B₁₂ levels of the lacto-ovo-vegetarians and total vegetarians were 657 pg/ml and 381 pg/ml respectively. There was no significant difference between the two groups. The average daily intake of vitamin B₁₂ was 2.0 ug for lacto-ovo-vegetarians and 0.6 ug for the total …

Restriction Enzyme Analysis Of Incomplete Parental Replicative Forms Of Øx174, Alicia Morales Bogardus

Loma Linda University Electronic Theses, Dissertations & Projects

The initial step in the infectious cycle of the single-stranded DNA phage øX174 is the synthesis of a DNA strand complementary to the infecting viral DNA producing a duplex molecule, the parental replicative form (RF). Electron micrographic examination of parental RF produced from viruses exposed to ultra-violet (UV) light suggests that synthesis begins at only one site. However, in vitro results and some recent reports of in vivo experiements contradict that interpretation.

Using restriction enzymes we have re-examined the incomplete RF made from UV-damaged phage. Parental RF made in vivo from viruses exposed to various UV doses were purified by …

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 …

Plant Response Parameters To General Patton's Armored Maneuvers In The Eastern Mojave Desert Of California, Randall J. Iwasiuk

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study, which was undertaken from September, 1977 through June, 1978 was to survey the response of perennial vegetation to General Patton's World War II armored maneuvers. This information will be used to help construct a basis for predicting recovery rates on the effects of off-road vehicle impacts in the California Desert Conservation Area (CDCA). These impacts were assessed in three usage categories: tank tracks in the maneuvers areas; roadways, which were used primarily by jeeps and trucks; and tent areas, cleared areas in which tents and other semi-permanent structures were erected. The data generated from these …

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 …

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

Masters Theses

No abstract provided.

Enantiomeric Influences In Neuroleptic Binding To Models Of The Dopamine Receptor, Timothy A. Robert

Electronic Theses and Dissertations

No abstract provided.

Culture And Growth Of Closterium Ehrenbergii (Desmidiaceae), David Bruce Renstrom

Dissertations and Theses

Methods were devised for the isolation and pure culture in defined mineral medium of Closteriurn ehrenbergii Menegh (Chlorophyceae). The effect of pH, type of nitrogen source, nitrate concentration, total hardness, and various buffers on growth were investigated. Best growth rates were obtained at pH 8 to 9, but good growth was observed even at pH 9.4. Nitrate, ammonia, or urea nitrogen could be utilized, but at concentrations greater than 10^-2M urea was toxic to growth. At higher concentrations of ammonia and nitrate longer lag phases of growth were obtained but eventual higher cell yields were obtained. Good growth …

The Role Of Exercise And Nutrition In The Rehabilitation Of The Geriatric, Robert R. Ladd

Loma Linda University Electronic Theses, Dissertations & Projects

[Abstract not included]

Reproductive Variability In Lytechinus Variegatus (Echinodermata: Echinoidea) From Different Habitats In A Florida West Coast Estuary, Robert G. Ernest

USF Tampa Graduate Theses and Dissertations

Lytechinus variegatus (Lamarck, 1916) is a sea urchin inhabiting shallow sub-littoral environments from Beaufort, North Carolina to southern Brazil. Although it has been collected extensively for embryological material in the southeastern United States (Harvey, 1956; Brookbank, 1968). there have been relatively few studies of its reproduction. Gonad indices were used to follow its annual reproductive cycle at Bermuda and Miami (Moore et al., 1963; Moore and Lopez, 1972), while elsewhere, only observations of spawn- ing have been reported (Boolootian, 1966).

In the Anclote estuary near Tarpon Springs, Florida, Lytechinus is the most conspicuous of the macroepibenthic invertebrates, and where requisite …