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Cell-Mediated Immunity Of The Dog Lung And Effects Of Inhaled 239puo2 Or Pulmonary Tumors, Jennifer Baker Galvin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cell-mediated immunity (CMI) in the lung has not been well characterized due to the lack of applicable tests. A major objective was to define pulmonary CMI serially in immunized and control lung lobes using the leukocyte procoagulant (LPCA) assay in young adult dogs. This was compared to a standard, but less reproducible CMI assay, macrophage migration inhibition facet (MIF). The CMI response, as measured by the LPCA assay, peaked in the blood 7 days after lung immunization. The pulmonary CMI response measured with cells obtained by bronchial lavage from the immunized and control lung lobes peaked at 9 to 12 …

Investigation Of Selected Aspects Of Kokanee (Onchorhynchus Nerka) Ecology In Porcupine Reservoir, Utah, With Management Implications, Paul Joel Janssen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Several aspects of kokanee (Onchorhynchus nerka) ecology were studied in the fluctuating, 80ha Porcupine Reservoir, Utah in order to determine optimum management strategies. In 1981, escapement was enumerated and estimates of egg deposition were made. An estimate of the resulting fry recruitment was also attempted and was successful up to the arrival of spring runoff. In 1982, escapement was enumerated and estimates of egg deposition were made, with subsequent estimates of egg deposition and percent survival to the advanced eyed stage. Age and growth rates were determined and survival rates estimated.

Escapement for 1981 and 1982 was 5,463 …

The Effect Of Heat Treatment On Meat Heme And Nonheme Iron Bioavailability For The Anemic Rat, Oranong Jansuittivechakul

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three separate experiments were conducted to investigate the effects of heat treatment on meat heme and nonheme iron bioavailability in anemic rats. Male weanling Sprague-Drawley rats were first made anemic, then subsequently fed with experimental diets. In the first experiment, dietary iron sources were raw or autoclaved meat mixed with ferrous sulfate to give the ratios of iron from meat and ferrous sulfate equal to 100:0, 75:25, 50:50, 25:75, and 0:100 respectively. For the second experiment, the dietary iron sources were raw or autoclaved meat mixed with bovine hemoglobin (HB) to give dietary iron ratios as described for experiment 1. …

Efficiency Of Converting Iron Into Hemoglobin As An Assay For Evaluating Iron Bioavailability, Paul Whittaker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of iron absorption on subsequent hemoglobin regeneration was investigated by repletion and subsequent analysis of an anemic weanling rat model. Primary assay procedure in these studies was the Regeneration Efficiency method.

As repletion or curative assay techniques form the central body of investigative research in iron utilization, the first subject of inquiry was the effect of repletion interval and degree of depletion upon the animals as monitored by physical indicators such as blood volume, growth and hematinic response. Percent blood volume is a particularly useful figure in the calculation of the amount of hemoglobin iron but was found …

A Study Of The Action Of Bovine Cathepsin D On Intramuscular Connective Tissue, Elimosaria Elikalia Maeda

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cathepsin D has been postulated to play a role in the tenderization of meat with ageing. Meat toughness has been related to connective tissue content and degree of myofibrillar shortening. This investigation was undertaken to determine the activity of cathepsin D on bovine intramuscular connective tissue.

Highly purified cathepsin D preparations from bovine spleen and bovine sternomandibularis muscle were obtained by ammonium sulfate fractionation followed by affinity chromatography on pepstatin coupled to controlled pore size alkyl amine glass beads. Maximum proteolytic activity using hemoglobin as substrate was obtained at pH 3.5 and 3.8 for bovine spleen and muscle cathepsin D, …

Longitudinal Pantothenic Acid Status Of Pregnant And Lactating Women, Won Oack Song

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pantothenic acid nutritional status was evaluated in a cohort of twenty-nine Caucasian pregnant women, aged 20-35, during their third trimester of pregnancy, at two-weeks postpartum and at three months postpartum. Seventeen non-pregnant, non-lactating women who had similar demographic backgrounds as the pregnant women were selected as a control group and followed the same experimental schedule as the pregnant women. A fasting blood sample, two days 24-h urine specimens and diet record were obtained for each of two days from each subject at each period.

The mean dietary pantothenic acid intakes of the women during pregnancy (5.30±1.74 mg/day) and during lactation …

Natural Killer Activity In Gardner's Syndrome, Ann Marie Stembridge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Gardner's syndrome is an autosomal dominant disease presenting multiple colonic polyps with a predisposition for malignant change. In addition to colonic polyp formation by early adolescence, extracolonic lesions appear often prior to polyp formation. One theoretical mechanism for the origin of polyps and malignancies in Gardner's syndrome is a genetic defect in the natural killer cell activity of patients with this disease. Natural killer cells are a subpopulation of lymphocytes that spontaneously lyse tumor cells and virally transformed cells. A study was undertaken to determine the natural killer activity of patients with Gardner's syndrome.

A technique termed chromium release was …

Evaluating The Design And Operation Of Irrigation Canals In Egypt, Amany El Kayal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A computer simulation model for temperature data was developed in order to generate synthetic daily temperature. The model consists of two components: a deterministic component represented by a Fourier series fit, and a stochastic component represented by an autoregressive model. The simulation model was proven to be able to preserve the main statistics of the historical series.

The data generated by the above temperature model were used as an input to an irrigation water requirements simulation model. This model incorporates the probabilistic nature of these requirements. The irrigation system of Abo Raya area in Egypt was used to demonstrate the …

Sheep Diets And Feeding Behavior In Single And Common Use Grazing Trials On Southwestern Utah Summer Range, George B. Ruyle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A series of grazing trials were conducted on high elevation summer range near Cedar City, Utah. Cattle and sheep were stocked alone and in common in .4 hectare (ha) paddocks. Stocking rates were .76 ha/AUM in 1981 and .60 ha/AUM in 1982. Vegetation measurements were taken before and after grazing treatments to quantify vegetation disappearance. Diet samples were collected from esophageally fistulated sheep in the paddocks before grazing treatments were applied. After a predetermined level of forage utilization was achieved, the paddocks were re-sampled by the esophageally fistulated sheep to examine diets consumed from the forage-reduced vegetation. Behavioral observations were …

Nutrition And Feeding Behavior Of Goats And Sheep Grazing Deciduous Shrub-Woodland In Northeastern Brazil, James Alan Pfister

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Production of sheep and goats in the Brazilian Northeast is important for the livelihood of both subsistence and market-oriented producers. Seasonal nutritional stress on animals in the caatinga vegetational zone of this region causes periodic high mortality and chronically low productivity. Under such conditions, the survivability of goats has been higher than for other domestic livestock. Possible reasons for this include unique aspects of dietary selection and goat feeding behavior. The objectives of this research were to seasonally determine the botanical and nutritive content of goat and sheep diets, to determine forage intake by grazing goats and sheep, and to …

Evaluation Of The Early Establishment Phase Of Agropyron Desertorum, Medicago Sativa And Atriplex Canescens In Monocultures And Mixtures, Oscar Luis Prado Escobar

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study evaluated the early establishment phase of various monocultures and mixed species plantings of Agropyron desertorum (AGDE), Medicago sativa (MESA), and Atriplex canescens (ATCA). The study was conducted under both greenhouse and field conditions. In the greenhouse, the experimental design was a split-plot, randomized-block design in time, using transplanted seedlings. The treatments were exposed to three water levels to determine species response to varying moisture availability. Plastic pots of 15.4 cm (diameter) by 17.9 cm (depth) were filled with 2,800 g of sandy-loam soil and brought to field capacity. The pots were weighted twice weekly and the water lost …

Accounting For Behavioral Contrast: Recent Interpretations, Ronald L. Snyder

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Behavioral contrast has been interpreted as a function of either (1) the reduction of frequency of reinforcement in one component of a multiple schedule or (2) the suppression of responses in one component regardless of reinforcement frequency.

These explanations are discussed in terms of their adequacy in accounting for several recent experimental results. Two alternative explanations are considered.

First, contrast is interpreted as a function of the relative summation of excitatory and inhibitory effects of stimuli.

Second, contrast is discussed as a possible function of a switch from a response-reinforcer contingency to a stimulus-reinforcer contingency as seen in auto-pecking. Both …

Stages Of Contemplative Mysticism: A Description And Taxonomy, Kenneth Burton Kaisch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to describe and classify the stages of contemplative mystical development in the major world religions. To accomplish this task, a sample of five major world religions was chosen from the total population. From each religion, a contemplative author who was regarded as an authority by the members of that religion was chosen. The major work of each author was described in order to make explicit his/her conceptualization of the stages of contemplative development. These conceptualizations were then compared together, resulting in two models of contemplative development. The first model was composed of those stages …

Jacobsonian Versus Autogenic Relaxation Training: Interactions With Locus Of Control, Mark J. Weaver

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to evaluate the thesis that matching locus of control with type of relaxation training enhances physiological self-control. This was accomplished by comparing the effectiveness of a somatic and a cognitive relaxation method for internal and external locus of control subjects. It was hypothesized that the two techniques vary in degree of cue salience, and that the attentional strategy of internals would interact with the cognitive approach while externals would respond better to the somatic approach.

Subjects were 80 volunteers from stressful occupations who scored high on the State-Trait Anxiety Inventory A-trait scale. Forty internals …

Applying The Concept Of Feeding Stations To The Behavior Of Cattle Grazing Variable Amounts Of Available Forage, Enrique R. Flores

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A quantitative description of the foraging process is necessary for effective planning and execution of intensive grazing schemes. Foraging behavior is defined as having two components: feeding and moving. At intervals the foraging animal walks a number of steps searching for food and then pauses to feed at a new position here termed a feeding station. Five behavioral variables were analyzed under this framework: 1) time spent at a feed ing station; 2) number of bites at a feeding station; 3) steps taken between stations; 4) rate of steps; and 5) foraging time. The experimental design consisted of grazing small …

Use Of Clearcut Habitats By Black Bears In The Pacific Northwest, Kim R. Barber

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Patterns of vegetation use by black bears (Ursus americanus) on Long Island, Washington were documented using radio-telemetry in 1973-74 and 1980-81. Secondary succession altered the vegetative compostion of clearcut areas through this time, reducing the areas dominated by productive brush species by nearly 50%. Seasonal food habits, consisted primarily of grasses and forbs in spring (den emergence-May) and flowers and fruits of shrub species in summer (June-September) and fall (October-den entrance).

Bears selected for clearcuts (5-21 years of age) over all other vegetation types for feeding but preferred areas dominated by large trees when inactive during both the …

Electronic Feeding Doors For Individual Feeding Of Group Housed Sheep Compared To Individual Housing And Feeding Or Group Housing And Feeding, Ronald J. Lane

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thirty-six mature purebred cheviot ewes and 36 polypaysired wether lambs were used in two separate experiments to determine the usefulness of an electronic feeding door as contrasted with traditional feeding situations. The sheep were stratified by weight into three management categories; group housing and feeding (G+G), individual housing and feeding (1+1), or group housing and individual feeding (G+1) using an electronic feeding door. The weight stratification formed a light and a heavy weight class resulting in a 3x2 factorial design. Two different training procedures were used to arrive at a generalized 14-day training sequence that does not require physical handling …

Locoweed Poisoning In Cattle: An Overview Of The Economic Problems Associated With Grazing These Ranges, John E. Barnard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Locoweed poisoning, caused by ingestion of certain species of Astragalous and Oxytropis, has had serious economic impacts through a loss of productivity in livestock. This study has attempted to evaluate losses suffered by livestockmen grazing their cattle on areas infested with locoweed species. The results indicate a serious economic impact on these individuals.

Personal interviews were carried out with five cattle ranchers faced with typical locoweed problems. These beef cattle operations were located in Utah, Wyoming, and New Mexico. All of these producers described similar problems and losses due to locoweed poisoning. Information obtained from these interviews was used …

An Extension Teaching Demonstration Using Broiler Chicks As A Model, Joseph B. Ishaya

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This test demonstration was intended to develop a modern management program to improve broiler production in Nigeria through extension teaching methodology. The management programs included animal health, nutrition, and general care.

Some of the factors that limit broiler production in Nigeria are associated with the management strategy presently adopted by Nigerian subsistence farmers.

This report considers the effect of different protein sources on broiler nutrition and the techniques necessary to get the farmers to practice the result of up-to-date research findings.

The extension teaching demonstration reported here is based on 60 day-old chicks. Chicks were randomly assigned to two pens, …

A Linear Programming Analysis Of Several Determinants Of Profit On A Simulated Northern Utah Dairy Farm, Jay Dee Atwood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of the study was to analyze several determinants of profit on a simulated northern Utah dairy farm. A linear programming model was developed to accomplish this. Optimal conditions on the farm were estimated and then other model applications were made to evaluate the importance of milk price, cropland ownership, and corn silage production and feeding. The significance of cow quality also was estimated.

Optimal conditions on the farm gave rates of return to capital between savings rates and loan rates obtainable at a financial institution. Marginal values derived for land did not support the current asking price of …

Effects Of Physical And Emotional Stress, Catecholamines And Naloxone On Hdl And Ldl Cholesterol Levels In Rats And Man, Andrew G. Goliszek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A series of investigations were undertaken to determine whether physical or emotional stress, catecholamines or naloxone (B-endorphon blocker) would increase serum total cholesterol and LDL and HDL levels. Physical stress given daily over a period of time caused a steady increase in serum total cholesterol and LDL without a significantly altering high density lipoproteins (HDL) or serum triglycerides. Daily injections of epinerphrine in oil caused an increase in both serum total cholesterol and LDL levels while daily injections of norepinephrine did not. Reversal of the treatments caused a reversed response in both groups of rats. Similar increases in both total …

Mule Deer Reproduction And Survival In The Lasal Mountains, Utah, Randall B. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mule deer (Odocoileus hemionus) reproduction and survival on the LaSal Mountains, Utah were studied from 1978-81. Reproductive rates were high, suggesting that summer and fall forage quality was adequate and was not responsible for low recruitment observed in recent years. The combined fetal rate, determined from laparotomies and carcasses, was 1.72 for all females older than 1 year (N = 114). Fetal rates were 1.15 for yearlings (N = 20), 1.80 for prime females (2-7 years, N = 78), and 1.75 for old females (8+ years, N = 16). No evidence of breeding was found among fawns (N …

Growth Of Targhee And Targhee Crossbred Lambs On Utah Rangelands, Holly Ann George

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Growth data were collected on 1848 Targhee and Targhee crossbred lambs from the Utah Agricultural Experiment Station flock at Cedar City for 1981 and 1982. The study objectives were to establish growth curves for seven lamb genotypes and examine within genotype growth differences among four grazing treatments (sheep alone, sheep and cattle mixed, both continuous and rotation).

Body weights were measured at birth, and at mean ages of 56, 120, and 154 (weaning) days of age. Linear, quadratic, and cubic regressions of weight on age were used to establish growth curves. Among genotype comparisons of entire growth curves were impossible …

The Effects Of So2 On N2-Fixation, Carbon Partitioning, And Yield Components In Snapbean, Phaseolus Vulgaris L., Stephen M. Griffith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary air pollutant sulfur dioxide has been shown to affect plant biochemistry and physiology, although very little is known about its effects on N₂-fixation in legumes.

This study was designed to determine if N₂-fixation, carbon partitioning , and productivity are affected under short term low level, so₂ exposures.

Greenhouse grown snapbeans (Phaseolus vulgaris L. cv. Earliwax), 29 days from planting, were exposed to 0.0, 0.4, and 0.8 parts per million sulfur dioxide for 4 hours day^-1 for 5 days in a fumigation chamber. At these concentrations there was no visible damage of …

The Photoregulation Of Phenylpropanoid Metabolism And Amino Acid Accumulation In Triticum Aestivum (Var. Fremont), Daniel J. Guerra

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wheat (Triticum aestivum L.) grown in controlled environments with a 24-hour photoperiod was analyzed for phenylpropanoid and amino acid metabolites. Discrete spectral environments, including a metal halide, high-pressure sodium and low-pressure sodium lamps, provided both photosynthetically active radiation and phenylpropanoid inducing fluences of light. A greenhouse spectral environment supplemented with fluorescent lamps was also used to culture wheat. All four spectral environments were used to culture wheat to maturity separately. The activities of phenylalanine and tyrosine ammonia-lyase were photoinduced in wheat tissue obtained from plants grown in the metal halide, high-pressure sodium and greenhouse spectral environments. These enzyme activities are …

Alteration In Serum Enzyme Levels, Activity Of Hepatic Monooxygenases, And Hepatocyte Morphology Due To Liver Enzyme Inducers In Microtus Montanus, Jeffrey Robert Hincks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Microtus sp. have been used in microcosm simulations of polluted environments. In this study, female Microtus montanus (mountain vole), 8 - 12 weeks of age, were pretreated with phenobarbital (PB), ß-naphthoflavone (BNF), or Aroclor 1254 (PCB) for 3 consecutive days. Doses ranged from 5 to 80 mg/kg for each pretreatment, while control animals received saline or corn oil only. The voles were sacrificed 1 day after the last dose of PB and 2 days after BNF and PCB. Hepatic microsomal enzyme activity of aniline hydroxylase (AH), p-nitroanisole-O-demethylase (PNA) and cytochrome C reductase (CCR) were measured in relation …

Hemoglobins Of The Cutthroat Trout Salmo Clarki, Jonathan N. Southard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nine hemoglobins have been isolated from the blood of cutthroat trout. All nine hemoglobins bind oxygen cooperatively and appear to be tetramers with molecular weights of -64,000. The oxygen equilibria and subunit structures of the purified hemoglobins were studied. In addition, the red blood cells of cutthroat trout were examined for the presence of ATP and GTP, which are known to be physiological modulators of hemoglobins in fishes.

Five hemoglobins with isoelectric points from 9.1 to 7.0 are classified as cathodal hemoglobins. These five hemoglobins have identical oxygen binding properties by the criteria tested. All have oxygen equilibria which are …

Effects Of A Wildfire On Seed Rain And Soil Seed Reserve Dynamics Of A Good Condition Sagebrush-Grass Rangeland In Central Utah, Mohamed Ali Hassan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objectives of this research were to investigate the ecological importance of soil seed reserves and seed rain on regeneration of a good condition sagebrush-grass range vegetation after a wildfire and draw conclusions leading to better understanding and management of such ecosystems. Investigations were conducted for two successive years on a community where major plants were neither rhizomatous nor sprouting. In such cases soil seed reserves and seed rain have to be the main source of regeneration. In addition to monitoring soil seed reserves and seed rain, vegetation changes during the past two years and the historical conditions of the …

Magazine Training Trials And Context Effects On Autoshaping, Fernando G. Oberdieck

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the autoshaping preparation subjects are exposed to magazine training (US-only trials) prior to the conditioning phase in which a stimulus (conditioned stimulus, CS) predicts the delivery of a response independent reinforcer (unconditioned stimulus, US). Two experiments examined the hypothesis that irrespective of the number of US-only trials administered the magazine training and autoshaping contexts interact to determine conditioning, as measured by contact responses to the CS. The contexts employed were houselight on (light, L) and houselight off (dark, D).

In Experiment I pigeons were exposed to 1, 20, 100, or 900 US-only trials in a D, or L, context …

A Study Of Drought Effects On Livestock Feeds And Products In The Western United States, Robert E. Blakeslee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Through the use of a regionalized Linear Programming model, a profit maximized optimal solution was obtained for livestock feed and product production for a selected base year (1979). Production data, seasonality, transfer activities, and herd liquidation are developed for ten feeds and seven livestock products and incorporated within the model. Two drought induced simulations were imposed affecting feed production and feed prices, procuring new optimal results. Drought is simulated by the use of crop-weather indexes and range response equations.

Results are discussed and presented in tables for the base year and drought simulations. Results include profits, costs, feed and livestock …