Digital Commons Network^™

Cytopathology Of Barley And Corn Leaf Tissue Infected With The Nd18 Strain Of Barley Stripe Mosaic Virus, Charles R. Mcmullen

Electronic Theses and Dissertations

The distribution of the ND18 strain of barley stripe mosaic virus (BSMV) in barley (Hordeum vulgare L.) and corn (Zea mays L.) leaf tissue was studied with light and electron microscopes. Virions were detected in the cytoplasm of barley mesophyll cells, subsidiary, guard and epidermal cells, vascular parenchyma cells, sieve and tracheary elements. Nuclear virus was found in barley mesophyll cells. Ultrastructural cytopathological changes were greatest in the inoculated leaf of barley which contained fewer virus particles than either primary acute or chronically infected tissues. Primary acute and chronically infected barley tissues contained intracellular virions scattered in the cytoplasm, in …

Amino Acid Additions To A Low Protein Corn-Soy Diet For Egg Production, Ali Baghaye Kashani

Electronic Theses and Dissertations

The present study was conducted to determine if the protein level of layer diets could be lowered from the: commonly used 16 percent to 12 percent by supplementation of some of the essential amino acids without reducing the performance of hens. The amino acids used were methionine, lysine, tryptophan and isoleucine. Egg production, egg shell thickness, interior egg quality, body weight, feed efficiency and free amino acid content of the albumen of eggs produced were criteria used to measure the (--) to treatment.

Integrated Numerical Simulation Of Drip Irrigation With Subsurface Drainage, James Ray Hoover

Electronic Theses and Dissertations

A numerical method and model were developed to simulate soil moisture during steady-state and transient flow toward a tile drain. Intermittent application of water by drip irrigation and rainfall were simulated by use of finite difference approximation equations. No known analytical solution for these flow situations exists because of the complex mathematics describing unsaturated flow in the soil. The computer model is based on the electrical resistance network analog. The explicit finite difference equations were solved by the successive over-relaxation method for steady-state flow and by iteration for transient soil moisture flow. The computer program for the model consists of …

Induction Of Parturition In The Ovine, Ernest L. Harman

Electronic Theses and Dissertations

The effects of flumethasone and prostaglandin F₂ (PGF) on the time of parturition were studied in the ewe. Pregnant ewes with known conception dates were allotted into a 3 x 3 x 2 factorial designed experiment (1973 study) and into a completely random designed experiment (1974 study). In the 1973 study treatments consisted of three hormones (flumethasone, PGF and saline control), three levels (low, .5 mg flumethasone, 5 mg PGF, 1 cc saline; medium, 1.0 mg flumethasone, 10 mg PGF, 2 cc saline; high, 1.5 mg flumethasone, 15 mg PGF, 3 cc saline) and two routes of administration (IM …

A Study Of Factors Associated With Outdoor Recreational Participation In South Dakota, James W. Delong

Electronic Theses and Dissertations

Participation by South Dakotans in selected areas of outdoor recreation was studied to determine varying extents of participation and associated selected sociodemographic, socialization and attitudinal factors. A statewide random sample of 474 heads-of-households (or their spouses) was selected and interviewed using a pretested schedule. The findings were present in three forms: a descriptive summary, a nonparametric analysis of association and a multivariate analysis. The descriptive analysis revealed fishing, hunting and lakeside camping or picnicking to be the activities participated in most frequently. Conversely, water-skiing, ice fishing and snowmobiling were participated in least. Analysis of association showed that each of the …

Interactions Of Rhenium(V) Chloride And Oxotrichlorobis(Triphenlyphosphine)Rhenium(V) With Selected Solvents, Paul Luther Holm

Electronic Theses and Dissertations

The purpose of this study was to examine the solution interactions of rhenium(V) chloride and oxotrichlorobis(triphenylphosphine)rhenium(V) in a continuation of studies of rhenium(V) chemistry. These goals were accomplished using vacuum line and Schlenk tube techniques. As a result of this work, rhenium(V) chloride was found to dissolve with reaction in 1, 4-dioxane, diethyl ether and acetone. There was only a very small amount of rhenium(V) chloride which dissolved in carbon tetrachloride, chloroform and cyclohexane. Part of what did dissolve was shown by electronic and infrared spectroscopy to be oxotetrachlororhenium(VI) which was present as an impurity in small amounts. Oxotetrachlororhenium(VI) reacts …

Prices, Wages, And Causality, Marshall Ugo Constantino

Electronic Theses and Dissertations

This study is an attempt to examine the hypothesis of unidirectional causality between wages and prices. That is, do wage movements depend solely on price movements, or is there "feedback" from wages to prices endogenous to the price wage relationship? Do price movements depend solely on wage movements or does "feedback" from prices to wages exist? In addition, an attempt to provide some insight into the controversy created by the use of spectral methods to determine lead-lag relationships in time series data is made.

Opinions And Sources Of Information And Influence Of South Dakota High School Guidance Counselors Concerning South Dakota Colleges And Universities, Roger A. Christianson

Electronic Theses and Dissertations

The purpose of this study is to determine the opinions of South Dakota high school guidance counselors with respect to South Dakota colleges and universities, to determine their sources of information about various colleges and universities, and to identify factors which may influence counselors’ opinions of a college or university. Results of this study will: a) contribute to our understanding of the dynamics of information seeking by high school students concerning college choice, and b) serve college and university administrators in their efforts to provide prospective students with better, more effective, information about their institution’s programs and offerings.

Prevalence Of Listeria Monocytogenes In A Bovine Associated Environment, Verne D. Brakke

Electronic Theses and Dissertations

Listeria monocytogenes has emerged into the realm of disease causing bacteria as a pathogen of public health importance. Its opportunistic and ubiquitous nature has led to an ever increasing number of case reports implicating this organism in human and animal disease. Following its discovery Listeria has been observed in many countries from the tropics to the arctic (6). In addition to human subjects, Listeria has been found with a very wide host range which includes 37 mammals, 17 fowls, ticks, fish, crustaceans, silage, soil, dust, slaughter house waste, stream water, sewage and mud.

Propagation Of Selected Native Prairie Plants By Leaf Tissue Culture, Bernard Erlyn Ellis

Electronic Theses and Dissertations

Preservation of our native prairie has long been neglected while extensive farming practices have reduced the native prairie to isolated areas of untillable land. These diminishing acres of prairie (Jenkins 1971, Tinker 1971) are our remaining link with the stable environment after man has disrupted the landscape to his advantage. The objective of this investigation was to produce plantlets of selected native prairie plants by leaf tissue culture and to eventually establish them in the field. In doing this it was necessary to study the characteristic of each species in both culture and field behavior. Twenty species were selected for …

A Philatelic Price Model, Terry Gene Doversberger

Electronic Theses and Dissertations

The purpose of this thesis is to develop a model which will explain the 9175 market price of single, uncancelled, United States postage stamps of regular or commemorative issue to philatelists. This model was also tested for ability to predict future prices of these stamps. Commemorative stamps are special issues which commemorate some anniversary or event of local, national or international importance, or which honor some person. Usually such stamps are used for a limited period concurrently with the ordinary series (regular issue).

A Rotating Elliptical Cutting Device For A Forage Harvester, John Richard Durfee

Electronic Theses and Dissertations

Many variables have to be taken into consideration, along with design criteria, if a plant stem cutter is to perform satisfactorily. Some plant characteristics which affect the energy required to cut plant stems are: (a) moisture content of the plant, (b) maturity of the plant, and (c) the plant variety. Some important mechanical variables for the design engineer include: (a) clearance between the cutting blade and the stationary edge, (b) the sharpness of the cutting blade, and (c) the width of cut. The design and subsequent performance of an elliptical cutter would be dependent upon these variables and operating variables …

Forecasting By Exponential Smoothing, Timothy Paul Cronan

Electronic Theses and Dissertations

Forecasting is attempting to predict the future. It is an estimate of what the future demands. There are many ways to predict the future or to forecast. The purpose of this paper is to present various forecasting techniques. Concentrating on exponential smoothing. Exponential smoothing is a method of forecasting that uses the least possible amount of past data, reflecting those past movements in the data. This paper will point out the effects of external information of forecasts and how exponential smoothing is used in forecasting. It will attempt to show some of the more important application of forecasting. An important …

The Relationship Between Sociological And Biographical Variables And Self-Concept Scores Of Four- And Five-Year Old Children, Linda E. Derscheid

Electronic Theses and Dissertations

The purpose of this study was to provide information concerning factors that could relate to the self-concept development of four-and five-year old children. The factors studies were: age, sex, birth order family size, socioeconomic status, whether or not the child had attended nursery school, day care, or Head Start, how long the child had attended the preschool program, and the type and quality of the preschool environment.

Women In The Novels Of Herve Bazin, Doris Clay Landon

Electronic Theses and Dissertations

No abstract provided.

Theta Functions Of Jacobi / By Barbara Kay Shaw, Barbara Kay Shaw

Electronic Theses and Dissertations

No abstract provided.

Food Habits, Growth, And Production Of Young-Of-The-Year Walleyes, Stizostedion Vitreum Vitreum (Mitchell), In A South Dakota Pond, Ronne E. Walker

Electronic Theses and Dissertations

A 12.45 hectare South Dakota pond was stocked with 25,000 walleye, Stizostedion vitreum vitreum (Mitichell), fingerling on 13 June, 1973. Walleyes were monitored for growth rate and food habits until 13 September, 1973. Walleyes were removed from the pond using various methods in order to evaluate the efficiency of removal methods. The average total length and average weight of walleyes in the pond increased from 43.5 mm and 0.50 g on 13 June to 167.1 mm and 41.25 g on 13 September. This was a gain of 123. 6 mm and 40.75 g or an average daily increase of 1.34 …

An Evaluation Of Remote Sensing Techniques For Water Resources Management Of The James River, Robert E. Isakson

Electronic Theses and Dissertations

It is the general objective of this project to demonstrate the applicability of remote sensing tehcniques to water resources management of the James River Basin in South Dakota. Specific objectives are: 1. To investigate the applicability and capabilities of Earth Resources Technology Satellite, Skylab, and aircraft remotely sensed data as they might be applied to water resources management in the James River Basin, and. 2. To identify operational techniques and equipment required to cost effectively extract water resources management information from remotely sense data.

Remote Sensing Of Water Quality In Prairie Lakes, Brian D. Thoreson

Electronic Theses and Dissertations

The possibility of predicting prairie lake water quality using remote-sensing data during the 1974 open water season was investigated. Water quality samples were collected to coincide with satellite (LANDSAT-1) overpasses ad low-altitude aircraft flights. Twelve different remote-sensing estimates were taken from LANDSAT-1 imagery, low-altitude aerial photographs, ground-based radiometer, and ground-level photographs. These were correlated with prairie lake water transparency (secchi depth) and algae abundance (chlorophyll ‘a’ and total cell concentrations). For predictive purposes multiple regression analysis were performed using the three water quality parameters as independent variables. The correlations between the three water quality parameters and physical factors (rainfall, solar …

A Current Appraisal Of The Influence Of Price Expectations On Interest Rates, Michael Lee Walsh

Electronic Theses and Dissertations

The purpose of this study is to briefly review the different between two of the more prominent earlier studies and Yohe and Karnosky’s study. Further, this study will apply the estimation technique used by Yohe and Karnsky to more recent data to determine if present lags are longer or shorter and if the results obtained in their expanded model still hold.

The Role Of Commercial Banks In Industrial Development In South Dakota, Loren W. Tauer

Electronic Theses and Dissertations

This study investigates whether industrial development in South Dakota has been hampered because of financial constraints. The study focuses on commercial banks and their role in financing and promoting industrial development. Results of the study will provide public and private decision-makers with information needed to assess policies devised to facilitate or effect attainment of the two major economic development objectives for the state: reducing previous migration patterns and narrowing income differentials.

An Estimation Of The Price Elasticity Of Deman In The Gasoline Industry, Bennie Ray Hepfinger

Electronic Theses and Dissertations

The purpose of this study is to estimate the price elasticity of demand in the gasoline industry using an excess demand model as developed by McCallum and applying two stage least squares as a means of estimation.

B.T. McCallum in his article "Competitive Price Adjustments: An Empirical Study" formulates models of competitive price adjustments and explores the adequacy of each for empirical use . This excess demand model as developed by McCallum will be used as the basic model in this discussion. It will be reduced to a reduced form equation and tw6 stage least squares will be applied resulting …

Economic Analysis Of The Management Of Idle County Funds In South Dakota, Wanda M. Leonard

Electronic Theses and Dissertations

The objective of this report is to compute the potential earnings of a small county in South Dakota, that by comparison to other counties in the state, is in a relatively good position with respect to the investment of idle cash funds. The assumption is that if a county with a relatively good investment program can earn additional income, the potential revenue for counties with a more modest investment program would be even greater.

Ridge Vent And Wind Direction Effects On Airflow Characteristics In A Model Open Front Beef Building, Robert K. Egan

Electronic Theses and Dissertations

Ridge vent design and building orientation with respect to predominating winds are two primary factors influencing the effectiveness of natural ventilation. Research concerning ridge vent design and building orientation as a means of optimizing natural ventilation is inconclusive and incomplete. Therefore, a model study was conducted to study ventilation characteristics of a model open front beef confinement unit with the following objective: 1) Evaluate the effects of ridge vent design and wind direction on air flow characteristics and temperature in a model of an open front beef building. 2) Develop prediction equations for the relationship between wind velocity and outlet …

Soil Salinity, Sodium Levels, And Corn Production As Affected By Rates Of Applied Beef Wastes, James L. Halbeisen

Electronic Theses and Dissertations

In order to establish relationships between beef waste application rates on the land and its effect on soil, an experiment was conducted at the Southeast South Dakota Experiment Farm. Beef steers were fed to a finished market weight from approximately 200 kg (441 lb) with a typical beef finishing ration which varied only in sodium chloride content among the treatments and spread at various rates on the soil. The objectives of this investigation were: 1) to establish a beef waste application rate on dryland that will permit crop production without excessive salt or sodium accumulation in the soil and 2) …

Reliability Of Laboratory Germination And Tetrazolium Tests In Predicting Soil Emergence Of Five Grasses Native To South Dakota, William H. Bohl

Electronic Theses and Dissertations

The ultimate gal of seed testing is to determine the quality of seed that is to be used for planting (2). Two factors which determine the quality of seed are the purity and germination percentages. Purity is determined by separating a sample into four fractions: 1) pure seed; 2) inert matter; 3) weed seeds; and 4) crop seeds. Laboratory germination of seeds is conducted under specified controlled conditions depending on the method which has been previously determined to give the highest germination percentage of the particular species. Another test which is being used mainly for native grasses is a viability …

Relationships Of Scores Achieved On A Crawl Stroke Rating Form And Selected Measures Of Stroke Efficiency In Swimming, Bradley Laverne Erickson

Electronic Theses and Dissertations

The continuous surpassing of records is an indication that performances in competitive swimming are steadily improving. Success in competition depends upon a swimmer’s ability to “maintain a high velocity over time.” Factors which determine the ability to maintain high velocity include muscle endurance, efficiency, and total capacity for energy expenditure. Though various training methods, the swim coach has been able to increase physiological change in his athletes, including muscular endurance. A valid measure for determining energy expenditure is through analysis of data obtained by testing for oxygen consumption. There is also a linear relationship between oxygen consumption and heart rate. …

Design, Construction And Testing Of An Animal Operated Device For Coordinated Feeding Of Liquid Supplement And Granular Material To Cattle, David B. Goos

Electronic Theses and Dissertations

The objectives of the project were established as follows: 1. Design, develop, and construct an animal operated device to coordinate the feeding of grain and liquid protein supplement of cattle. 2. Test the operation and performance of the feeding device under laboratory and actual feeding conditions. 3. Investigate individual animal participation in the use of the feeding device. 4. Analyze the economic feasibility of the animal operated device compared with current pasture supplementation systems.

Bentonite Or Sodium Bicarbonate In High-Concentrate Lamb Diets, Gerald Bruce Huntington

Electronic Theses and Dissertations

A rapid change of ruminants from high-roughage diets, often used in background feeding programs, to high-concentrate diets used in the finishing phase tends to promote various digestive tract disorders. A major change in diets gradually made over a period of 3 to 4 weeks generally allows time for the rumen microflora to become adapted to the new conditions and minimizes digestive problems. However, performance during this period is often unsatisfactory. In the short-term feedlot finishing of ruminants for slaughter, the importance of profitable weight gains during the initial adaptation phase of the feeding period becomes relatively more important. Methods of …

Effects Of Selected Physical Traits On The Layout And Vertical Vaults Of Women Intercollegiate Gymnasts, Karen Lee Schwan

Electronic Theses and Dissertations

The purpose of this study was to determine whether a relationship existed between reaction-performance time, static flexibility, power and vaulting scores earned by college and university women gymnastics in selected vaults during intercollegiate competition.