Digital Commons Network^™

Assay And Control Of Staphylococcal Enterotoxin A Development In Cheddar Cheese Slurries, Niranjan R. Gandhi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Attempts were made to adapt the microtiter hemagglutination inhibition assay technique for the assay of enterotoxin A. The presence of a potent hemagglutinin in crude and partially purified preparations and the instability of sensitized erythrocytes prevented its use for routine analysis of enterotoxin from culture media and foods.

A capillary tube immunological assay was developed in which 1 μ g of enterotoxin/ml was detected in less than 1 hr . Interfacial reaction of antisera and enterotoxin solutions in a 1 mm internal diameter capillary tube allowed rapid detection and serological typing of enterotoxins.

Staphylococcus aureus growth and enterotoxin A development …

Effects Of Land Use On Water Quality: Summit Creek, Smithfield, Utah, David W. Meyers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of various land uses on water quality in Summit Creek were evaluated during the period beginning March 13, 1971 and ending October 27, 1971. Potential sources of pollution investigated were: (1) septic tank use, (2) feedlot runoff, (3) urban runoff, (4) rural runoff.

Samples were collected from five sampling stations on 16 separate days during the sampling period. Analyses were performed to determine the following constituents: ammonia, nitrite, nitrate, total phosphorus, orthophosphate, coliform bacteria, chloride, suspended solids, volatile suspended solids, total carbon, organic carbon, temperature and pH.

Agricultural activities, including livestock feedlot operations, were identified as the major …

An Analysis Of Stock Densities And Harvest Of The Cutthroat Trout Of The Snake River, Teton County, Wyoming, John W. Kiefling

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An intensive creel census and marking program was conducted in 1969 and 1970 to make possible population estimates and estimates of harvest of cutthroat trout in the Snake River in Teton County, Wyoming. Stock density determinations made in one of the five study areas provided an estimate of 400 and 992 cutthroat trout, eight inches or more in length, per mile of stream in 1969 and 1970 respectively.

Harvest data provide an estimate of 5,207 and 5,903 cutthroat trout harvested in 1969 and 1970 respectively. The harvest estimates obtained in this study are not comparable to those made in 1967 …

The Effects Of Age And Induction On Cockroach Mixed Function Oxidase Activity And Cell Morphology, Richard L. Turnquist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Female American cockroaches showed definite age-dependent changes in levels of activity of the microsomal mixed function oxidase chain. Cytochrome P-450 levels, EPN-detoxication, and p-nitroanisole O-demethylation activities were very low in young adult insects but increased steadily reaching a peak at about 100 days in fat body and at about 90 days in midgut and hindgut. The activities then declined rapidly reaching levels of young insects at about 130 to 140 days of age. NADPH-NT-reductase activity was high in young insects and declined during the first few weeks of adult life. This activity too showed a peak at about …

The Adequacy Of The Rich County 701 Plan In Controlling The Pattern And Intensity Of Land Use Around Bear Lake, Utah, William N. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis is to evaluate the potential effectiveness of the Rich County 701 Plan as a planning and management aid in controlling the development around Bear Lake. The success of the plan in integrating cultural data and natural resource data is judged on the basis of professionally accepted techniques of resource analysis and on the availability of pertinent planning data.

Guidelines for evaluating the land use controls for Bear Lake that will result from the Plan are derived from the shoreland ordinances of Wisconsin and Minnesota and the lakeshore experiences of New Hampshire and Vermont.

The Use Of Story Reading As A Method Of Improving Verbal Expression Of Head Start Children, Romayne Norris Sternad

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this experimental study was to conduct and evaluate a teaching method for improving verbal expression performance of Head Start children. The teaching method of language stimulation given the experimental subjects was based on story reading and retelling with active participation by the children in daily small group tutoring sessions, for seven weeks. An academic program given the control subjects included specific vocabulary and sequencing training. Verbal expression was measured by an analysis of stories told by each subject before and after tutoring, in response to sequence pictures and standup figures. Measures of vocabulary, sentence structure and evidence …

Children's Awareness Of Environmental Pollution, Carol A. Darling

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine children's awareness of environmental pollution and the effect of environmental education on the awareness of preschool children.

Data for this study were collected by individually interviewing 20 preschool, 20 first grade and 20 third grade children. These 60 children were presented 15 colored slides and 9 words denoting various types of pollution and environmental symbols and slogans. The slides varied from litter on a beach, chimneys emitting black smoke, and polluted water to such environmental symbols as Smokey Bear, Johnny Horizon, and Woodsy Owl. In addition, the environmental symbols were also presented …

Individual Family Contribution To Paper Pollution In Cache County, Carroll Porter Latham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Paper waste discarded by families of five persons in Cache County was studied for two seven-day periods. The sample consisted of 19 families comprised of a father who was employed full-time, a mother, and three children living at home. A background questionnaire was administered to each family for the purpose of describing the sample.

Sample families were given (1) plastic bags for storing of paper wastes and (2) bathroom tissue, the unused portion of which was collected with the other paper discards. The weight of all paper discards was tabulated for each family and an average was tabulated for families …

An Economic Analysis Of Nitrogen And Phosphorus Fertilization On Several Utah Range And Meadow Sites, Thomas M. Quigley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Previous research has shown that rangeland forage production can be increased through fertilization. A study was conducted to determine if fertilization of various Utah range sites was economically feasible. Six range sites were selected for analysis. The addition of nitrogen increased forage production on three sites. Phosphorus had no effect in increasing production. Production functions of the form, Y = a + bN - cN² , where Y is pounds of forage per acre and N is pounds of nitrogen per acre, were estimated for both fall and spring applications. Using current prices of Y and N the optimum …

Development Of An Interpretive Document For The Bear River Migratory Bird Refuge, William R. Burbridge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since its inception, the National Wildlife Refuge System has been administered for management and restoration of habitat essential to the propagation and welfare of resident and wintering wildlife species. Acquisition of additional System units has been primarily directed to the benefit of the migratory bird resource. As of July 1, 1968 about 250 of the 321 refuge units were managed for the waterfowl resource (U. S. Department of Interior, 1968a). However, this growth of the System has been accompanied by an increase in recreational use of the refuges. In 1962, Public Law 87-714, the Refuge Recreation Act, was passed to …

Inferred Values Of Clothing Related To Adjustment Among Pregnant Women, Violet Elizabeth Dowdeswell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The first objective of this study was to investigate the adjustment of women during pregnancy through various indices, namely: level of anxiety, attitudes to pregnancy, and perception of body-image boundaries, and to investigate the relationship among these indices. A second objective was to determine if a significant rank order of values inferred through clothing exists among pregnant women, and to relate these values to the measures of adjustment. The comparison of women by trimester and gravidity on the measures of adjustment and the inferred values, was a third objective.

The theoretical framework proposed that adjustment to the stress of pregnancy …

Population Ecology Of Uinta Ground Squirrels, Norman A. Slade

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The behavior and ecology of Uinta ground squirrels (Spermophilus armatus) at the Utah State University Forestry Field Station northeast of Logan, Utah were studied from 1964-1971 to determine the role of behavior in population regulation. From 1965 to 1968, data were collected to establish population norms. In 1968, the population density was reduced experimentally to help elucidate regulatory processes. This paper compares the dynamics of the population before and after the population reduction.

Before the density reduction, juvenile survival was lower than that of yearlings and adults. The disappearance of juveniles was associated with their tendency to disperse …

Evaluation Of The Filter Paper Method For Estimating Soil Water Potential, Samir Al-Khafaf

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The filter paper method for measuring soil water potential was evaluated. The method was calibrated using salt solutions (-1.4 bars to -22.4 bars), sample chamber psychrometer (-1 to -50 bars), pressure plate (-0.1 to -15 bars) and soil column at equilibrium (0 to -0.2 bars). It was found that the absolute temperature had little effect on the predicted soil water potential, but a temperature variation had a large effect. It was found that the temperature fluctuation must be small. The predicted water potential was influenced by the type of contact of the soil with the filter paper. It is suggested …

Nitrogen Movement Under Irrigated Corn As Influenced By Nitrogen Source And Rate, Douglas C. Muir

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine nitrogen movements under a fall applied fertilizer as affected by rate of application of fertilizer, type of fertilizer carrier, and by crop grown. Two nitrogen fertilizers, calcium nitrate and ammonium sulfate, were applied in the fall of 1970. The soil profile was sampled in the spring of 1971 and again in the fall of 1971. Nitrate-nitrogen from both the calcium nitrate and the ammonium sulfate applications was found to have moved significantly from the time of application to the time of spring soil sampling. Two effects from the high rate of both …

Boron Movement In Soil Columns, Joseph William Stucki

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three adsorption theories--Langmuir, B.E.T., and Freundlich--were applied to boron interaction with Aiken clay loam and Vernal sandy loam soils to determine which bests describes the system.

Column studies were conducted to obtain constants related to mass fluid flow and fluid dispersion within the column. An inert ion was used to obtain the pore volume and to calculate the fluid dispersion coefficient. These data were used to solve the material balance equation by the explicit numerical method developed by Lai for a digital computer. The output from the computer was a predicted profile boron distribution within the soil column.

The soil …

Economic Efficiency Of Grazing Systems, Muhammad Nazir

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Benefits and costs of implementing the specialized grazing systems on federal rangelands managed by the Bureau of Land Management (BLM) were studied. First only the direct benefits and costs were used to determine the internal rates of return on the Bureau of Land Management investments in grazing systems. Secondly, the effects of these systems on profits of private ranchers were determined. Finally the benefits and costs stream on the Bureau of Land Management and the changes in ranchers' profits were brought together to find out the net gain to society from investing the federal funds in specialized grazing systems.

The …

Nutrients And Phytoplankton In Hyrum Lake, Robert Bruce Murray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The current investigation indicates that the routine appearance of a noxious blue-green algal bloom of Aphanizomenon flos-aquae, in Hyrum Lake, a reservoir in northern Utah is a result of excess phosphorus. Data indicate that the algal growth is initiated by phosphorus liberated from the phosphorus rich bottom sediments, and at a time when nitrogen is present in excess in the lake relative to phosphorus.

Results indicate that the Little Bear River is the major source of nitrogen and phosphorus contributing to the eutrophication of Hyrum Lake. Nitrogen and phosphorus fluctuations in the Little Bear River proved to be concurrent with …

An Evaluation Of The Competitive Position Of Utah Livestock Production To Other Livestock Producing Areas, Kenneth H. Gray

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis is to make an evaluation of the competitive position of the Utah livestock industry by use of a linear programming model (MPS-360). This is on the basis of the least cost means of production to meet the quantity demanded of the livestock products. This is accomplished by dividing the United States into six regions where Utah is one of these regions to enable careful consideration of Utah's agricultural enterprises.

The agricultural products used in the analysis are beef, pork, broilers, turkeys, eggs and milk.

The feeds used for production are barley, wheat, corn, oats, milo, …

Adsorption-Desorption And Movement Of Picloram (4-Amino-3,5,6-Trichloropicolinic Acid) In Soils, Desh Raj Duseja

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Adsorption and desorption of picloram (4-amino-3,5,6-trichloropicolinic acid) in soils was studied utilizing both batch technique and soil columns. The five soils from the states of Utah and California ranged from 0.6 to 18.7 percent in organic matter content, 5 to 21 percent in sesquioxides and 6.45 to 7.55 in pH. In batch studies, the factors affecting picloram adsorption-desorption included time, soil type, organic matter, herbicide concentration, temperature, pH, and inorganic electrolytes. The soils adsorbed 10.8 to 58.2 percent of the added picloram from 0.05 to 10,0 ppm of picloram aqueous solutions. Adsorption was highly correlated with organic matter (r = …

Development Of Environmental Education Field Trip Guides For Elementary School Teachers In Cache Valley, Utah, Sandra T. Brown

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was two-fold. The first was the development of environmental education field trip guides to areas in Cache Valley for teachers in grades three through six that would provide learning activities that cannot be structured in the classroom. Six field trip guides to areas of Cache Valley with accompanying activities and discussion questions were constructed. The guides were tested in the field by three groups of teachers and students and teachers not participating in the field test evaluated the guides for difficulties they would encounter in using the guides.

The second study purpose was to determine …

Semantic Influence And Concept Attainment Of Slang And Its Effects On Parents' And Teenagers' Linguistic Interaction, Kim Earl

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this research was to determine parents and teenagers slang awareness and when this awareness begins to appear in the vocabulary of the younger generation.

Two studies were construed to measure the intended purpose of t his research. Study A was conducted to determine if semantic influence and concept attainment of slang definitions would be greater for teenagers than that for adults. The instrument was an open ended word list consisting of 25 slang terms. Criterion for the selection of words was assessed by determining if each word used could be found in three of the five sources. …

Effects Of Selected Herbicides On Perennial Grasses And Water Pollution Under Tropical, High Rainfall Condition, Richard L. Chase

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The following herbicides were evaluated for their effect on perennial grasses and water pollution in El Salvador, Central America: MSMA (monosodium methanearsonate), DSMA (disodium methanearsonate), cacodylic acid (hydroxydimethylarsine oxide), paraquat (1 ,1 'dimethyl- 4,4'-bipyridinium ion), dalapon (2,2-dichloropropionic acid), amitrole (3-amino-s-triazole), atrazine (2-chloro-4-(ethylamino)-6-(isopropylamino)- s-triazine), diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea), and karbutilate (m-(3,3-dimethylureido)phenyl-t-butylcarbamate), The herbicides were sprayed on drainage channels at different dosage levels, Some plots received one application, others received two, and still others received three applications.

All herbicides except atrazine effectively controlled perennial grasses, Cacodylic acid was the most effective contact chemical, with dosage levels of 7 and 10 kg/ha achieving 77 percent …

The Comparative Effects Of Two Reinforcement Schedules Applied To Groups In Teaching Arithmetic Skills, Ronald C. Bennett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A behavioral approach to teaching in the public school system is difficult because of the inherent difficulty of finding positive reinforcers and administering them simultaneously to large groups of students.

This study attempts to apply the same tangible reinforcers to two groups of students under different schedules of reinforcement. The students in the study were in special classes termed "learning adjustment" classes because of their failure to perform at grade level in regular classroom settings.

One group was on a continuous schedule of reinforcement using tokens and gold strike stamps as reinforcers. The second group was also on a continuous …

Essential Tyrosine Residues In Calf Liver Uridine Diphosphoglucose Pyrophosphorylase, E.C. 2.7.7.9., Robert Carl Bachmann

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The catalytic necessity of tyrosine residues in uridine diphospho- glucose pyrophosphorylase [E.C. 2.7.7.9] was investigated. Chemical modification of the pyrophosphorylase by N-acetylimidazole indicated that tyrosine residues were essential for activity. Approximately 23 of 112 tyrosines per molecule of 475,000 Daltons could be 0-acetylated. Solvent perturbation difference spectroscopy supported this number of exposed tyrosine side chains and in conjunction with chemical modification indicated that at least 11 to 12 tyrosyl residues per protein molecule are fully exposed. it her subst rate, uridine t riphosphate or uridine diphosphoglucose, afforded significant protection against inactivation by N-acetylimidazole.

The significance of these tyrosine residues is …

Plant Adaptation To Cold I. Chlorophyll Ii. Minerals, Peter Rosen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A number of montane herbs in northern Utah typically form flower buds beneath the snow cover and flower either through it or immediately after its recession. Two of these species, one naturally occurring, Claytonia lanceolata, and one cultivated bulb, Galanthus nivalis, were investigated for their response to this stress environment.

Snow depth patterns, chlorophyll content of tissues, and plants grown in light-tight boxes, suggest that light passing through the snow to reach plants growing underneath is not critically involved in the timing of their developmental cycles or in their ability to endure this low temperature environment.

Ability to endure stress …

Factors Affecting Quality And Location Values For Resident Deer Hunting In Utah, Jim C. Wrigley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Application was made of the economic rent method of resource valuation for the resident deer hunt in Utah. Total economic, location and quality rent values were estimated for all hunting units. These values incorporate the relationship existing between the variable use cost and the units of activity associated with the site.

Data were collected by mail survey from hunters following the 1970 season. Approximately 2033 questionnaires were used in the analysis. Additional data were collected from the Utah Division of Natural Resources.

The total rent value estimated from the model was approximately $3,326,238.00. Eighty-five percent of the total was attributed …

Effect Of Bear River Storage On Water Quality In Bear Lake, Utah-Idaho, Robert L. Nunan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since 1912 concentrations of the major anions and cations (except calcium) in Bear Lake water have shown a steady decrease which has been attributed to a dilution of Bear Lake by Bear River water, Bear Lake having been used as a reservoir for Bear River water since 1918. This study examined the changes which have occurred in Bear Lake water chemistry since 1912 and tested the validity of the dilution theory.

Simple water and salinity budgets were determined for the Bear Lake system and used to simulate the effect of Bear River storage patterns since 1918 on the concentrations of …

The Surface Movement Of A New S-Triazine Herbicide From Treated Cropland And Its Environmental Effects, Zeldon A. Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Six days following the application of 1.5 and 3.0 lb/A of 2- methoxy-4-sec.-butylamino-6-ethylamino-s-triazine (GS-14254) to established plots of alfalfa, water samples were collected at several distances from the plots and analyzed for herbicide residues with a Beckman DB-G grating spectrophotometer. The data indicate that GS-14254 is transported in small amounts but that the concentrations in the runoff water decline rapidly with increased distance from the treated areas and time.

S-14254 produced no visual injury symptoms of leaf chlorosis or plant stunting on alfalfa at the two rates used. However, some initial injury has been reported by other workers. …

Linkage And Inheritance Studies Involving An Annual Pollen Restorer And Other Genetic Characters In Beta Vulgaris L., Theron E. Roundy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A pollen-restorer sugarbeet inbred, developed by four generations of selection of highly fertile plants from a CMS X table beet cross, was studied to determine if a change from sterile to fertile cytoplasm had occurred. Data showed that the fertility expressed by the restorer inbred was the result of genetic factors and not cytoplasmic reversion. Linkage tests with the R^f gene showed independence of the YRB group, m and vi₄. A yellow-leaf mutant was inherited as a simple recessive factor. A partial pollen-restorer character, found in the yellow-leaf material, was inherited as a single dominant gene. The …

Ecology Of Aroga Websteri Clarke In Curlew Valley, Utah-Idaho, Reed L. Kirkland

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The ecology, life history, and population dynamics of the sagebrush defoliator, Aroga websteri Clarke, were studied in the field and laboratory. The defoliator has one generation a year at the Curlew Valley site. It overwintered in the egg stage and passed through five larval instars. Ten parasite species attacked the defoliator at the study site. Four species, Orgilus ferus, Phaeogenes sp., Spilochalcis leptis, and Apanteles cacoeciae, contributed over 75 percent of the total incidence of parasitism. Parasitism ranged from 20 to 76 percent in 1971, but only ranged from 6 to 29 percent in 1972. This decrease …