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Polymorphisms, Linkage And Mapping Of Four Enzyme Loci In The Fish Genus Xiphophorus (Poeciliidae), D C Morizot, M J Siciliano

Faculty, Staff and Student Publications

Electrophoretic variants at four additional enzyme loci--two esterases (Est-2, Est-3), retinal lactate dehydrogenase (LDH-1) and mannose phosphate isomerase (MPI)--among three species and four subspecies of fish of the genus Xiphophorus were observed. Electrophoretic patterns in F1 hybrid heterozygotes confirmed the monomeric structures of MPI and the esterase and the tetrametric structure of LDH in these fishes. Variant alleles of all four loci displayed normal Mendelian segregation in backcross and F2 hybrids. Recombination data from backcross hybrids mapped with Haldane's mapping function indicate the four loci to be linked as Est-2--0.43--Est3--0.26--LDH-1--0.19--MPI. Significant interference was detected and apparently concentrated in the Est-3 …

Effects Of Barbiturates On Postsynaptic Responses In Aplysia Californica, Ila Leigh Cote

Biology ETDs

Barbiturates are widely used drugs, both as anticonvul­sants and anesthetics. However, their mechanisms of action are presently unclear although a number of hypotheses have been proposed to explain their effects. These hypotheses have primarily viewed the synapse as the site of barbiturate action.

The aim of this study was to elucidate some cellular mechanisms of action of the barbiturates and to suggest some correlations to their clinical properties. The effects of sodium phenobarbital and sodium pentobarbital on responses to iontophoretically applied neurotransmitters, primarily acetylcholine and gamma aminobutyric acid, were studied. The use of voltage clamp techniques in single neurons of …

Changes In Populations Of Soil Acari During The First Year After Clearcutting, Sue Ellen Orlaske

Dissertations and Theses

Soil samples taken from a clearcut and adjacent uncut site of a Douglas Fir and Western Hemlock old growth forest in the Cascade Range of southern Washington showed greatly reduced adult and juvenile population densities of macro-phytophagous, microphytophagous, and predatory soil acari in the clearcut. These effects appeared to be due to high lethal summer litter temperatures and reduced pore spaces due to scarification. Also, the number of species of acari in the clearcut was lower than in the control after clearcutting.

Ten Steps In Planning Your Farm Or Ranch Business, Wallace G. Aanderud, Ronald Thaden, John N. Maher, Francis Crandall

SDSU Extension Circulars

This is a companion to "Management guide for planning a. farm or ranch business" (EC 716) and "Livestock budgets and planning prices" (EMC 666). Forms are provided so that in ten easy steps you can. organize your business in various ways to see which looks most promising. You may either use your own information or the average figures from the management guide and livestock enterprise budgets.

Trees Of South Dakota, Paul E. Collins, L. L. Helwig

SDSU Extension Circulars

The study of trees often becomes puzzling to the beginner when several trees of the same species are examined. The leaves, bark, shape, fruit, etc., may differ from tree to tree. Trees are like people—no two are exactly alike. We learn our trees, then, by studying several trees, not just one. This gives us a knowledge of the range of these variations. In time we take these differences in stride. Identification is then no longer a problem. This booklet was prepared mainly for South Dakota boys and girls. It will assist teachers in the public schools and will be of …

Host Plant Preference In Two Generalist Herbivores, Jody Genelle Gray

Biology ETDs

The host plant preferences of two generalist lepidopteran herbivores were investigated at a field site near Albuquerque from 1977 to 1979. Observations of larvae in the field and measurements of available biomass for each host plant were combined to calculate preference rankings for host plants. Similarly, the relative preference of each herbivore for young or mature leaves was calculated. Both Estigmene acrea (Drury) and Hyles lineata (Fabricius) preferred to feed on Rumex hymenosepalus in the spring. H. lineata is univoltine and was not observed feeding on any other plant species. E. acrea is bivoltine and feeds on Senecio longilobus, Helianthus …

Steroid Hormones And Human Variability: Correlation Of Androgen Levels With Age And Occupation In Normal Subjects, Frances E. Purifoy

Anthropology ETDs

The endocrine system, coordinated with the central nervous system, is an important mediator of the genetic-environmental interactions which influence the development of human phenotypes. For this reason, endocrine parameters provide an important source of information for anthropological studies. This research focuses on the role of the endocrine system in normal human variability, with emphasis on the steroid hormones, which affect numerous aspects of mammalian morphology, physiology and behavior. Preceding the discussion of original research is an extensive literature review on hormonal variation in each of three areas: 1) sex and inter-individual variation, with emphasis on behavior; 2) variation with age, …

Nepal Studies Association Bulletin, Nos. 19-20, Nepal Studies Association, Donald A. Messerschmidt

Nepal Studies Association Newsletter

No abstract provided.

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 …

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

Pacific Studies

No abstract provided.

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

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

The Kentucky Warbler

No abstract provided.

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 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 …

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 …

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 …

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 …

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]

A Comparison Of Dramatic Storytelling And Puppet Storytelling As A Means Of Teaching Selected Nutritional Concepts, Edith M. Martin

Dissertations and Theses

The present study investigated the basic question: Will preschool, kindergarten, and first grade students have a greater increase in knowledge of selected nutritional concepts as a result of viewing a puppet story than a similar composite will have when the same material is presented via dramatic storytelling?

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 …

Comparative Functional Analysis Of The Masticatory Apparatus In Two Species Of Myotis, David Wesley Reduker

Biology ETDs

Comparative jaw and skull morphologies were analyzed in two closely related species of bats, Myotis volans (aerial insectivore) and Myotis evotis (foliage gleaner). Force vector analyses were performed on each muscle-bone lever system to determine the relative force produced at three designated functional points along the lower tooth row: the incisors, canine, and protoconid of the second molar. Results of the analysis indicate that Myotis evotis not only has a more powerful bite and grip than volans but it also has the potential for a much quicker jaw closure which is most effective at smaller angles of jaw opening. These …

Spatial And Temporal Activities Of The Yellow Mud Turtle, Kinosternon Flavescens, In Eastern New Mexico, Robert Charles Semmler Ii

Biology ETDs

Many small ponds in the eastern plains of New Mexico are inhabited by yellow mud turtles. Some of these ponds are permanent, but many dry out during the year. This makes the terrestrial activity of mud turtles an important aspect of their life history. When turtles were active within the ponds, they showed no preference for permanent over temporary water. There were always more females than males present in the ponds. As water levels receded, aquatic activity lessened and the turtles buried themselves just under the mud near the edge of the pond for a few days and then moved …

Herpetofauna (Anurans And Lizards) Of Eddy County, New Mexico: Quaternary Changes And Environmental Implications, John S. Applegarth

Biology ETDs

For interpreting environmental implications of Quaternary faunal changes, anurans and lizards are more informative than other vertebrates. Remains are analyzed from five sites in the limestone hills west of Carlsbad, Eddy County, New Mexico. The modern anuran and lizard fauna of Eddy County is reviewed in terms of habit requirements and known distributions and is used as a standard for interpreting prehistoric remains. Procedures are described for preparing comparative skeletons and for analyzing; prehistoric remains.

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 …

The Genetic Localization Of The Tuh-3 Gene In Drosophila Melanogaster, Daniel F. Woods

Retrospective Theses and Dissertations

No abstract provided.

Aspects Of The Life History And Reproductive Biology Of The Socorro Isopod, Thermosphaeroma Thermophilum (Crustacea: Peracarida), Stephen M. Shuster

Biology ETDs

Life history and behavioral information on North American isopods are limited and non-existent for the genus Thermosphaeroma. The habitat of T. thermophilum allows easy and accurate collection of field and laboratory data. The relative absence of complicating evolutionary contexts facilitates investigation of sexually selected behavior and morphology. Males are larger than females. Reproduction and mortality are somewhat seasonal. Sex ratio is consistently male-biased, which is attributed to male searching for mates and avoidance of males by non-reproductive females. T. thermophilum is omnivorous. Reproductive timing by females and its contribution to sexual dimorphism are discussed. Males choose mates by size and …

Sulfate Transport In The Sulfate Reducing Bacterium; Desulfovibrio Gigas, Joseph John Ruocco

Biology ETDs

The characteristics and kinetics of sulfate uptake and reduction by Desulfovibrio gigas were studied using radio-labelled sulfate, in order to assess the nature of terminal electron acceptor transport with respect to current membrane transport theory. Although sulfate is not accumulated into an intracellular pool, it is transported across the cell membrane prior to reduction as evidenced by studies on the localization of sulfate binding and reduction by cellular fractions. Sulfate is rapidly bound by whole cells to a stead, -state level which is a function of extracellular sulfate concentration and the availability of an electron donor. Hydrogen sulfide evolution begins …

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 …

The Management Of Iatrogenic Chylous Ascites, Joseph W. Lewis, Edward H. Storer

Henry Ford Hospital Medical Journal

Iatrogenic chylous ascites, although extremely rare, appears to follow direct lymphatic injury during intra-abdominal surgery or to be due to specific postoperative complications such as pancreatitis. Statistically, truncal vagotomy has produced the largest number of cases. Any noticeable lymphatic injuries at the time of surgery should be controlled with appropriate sutures or clips. If iatrogenic chylous ascites develops postoperatively, a course of conservative treatment including multiple paracenteses should be tried for several weeks if reasonable nutritional balance can be maintained. If fluid volume does not diminish or the patient's nutritional status is jeopardized, early exploration should be undertaken. A lipophilic …