Digital Commons Network^™

A Study Of Dioxane-Water And Dioxane-Dioxane Interactions, Joel William Beckmann

Electronic Theses and Dissertations

The main objective of this study was to consider the problem of whether or not information about intermolecular interactions can be obtained from the examination of macroscopic properties of various systems. In this study it was chosen to investigate the intermolecular interactions of a liquid-liquid system. The liquid-liquid system, dioxane-water, was selected for two reasons. First, a considerable amount of work has been done on this particular systems so there is a large body of information with which to work and with which correlations can be made. Secondly, there is a large discrepancy among the interpretations of the results of …

The Response Of Poults To Growth And Antirachitic Factors Of Soybean Meal And Corn, Richard Lane Arnold

Electronic Theses and Dissertations

Soybean by-products have been used for animal feed protein extensively in the past years. Soybean meal has become a major source for poultry diets. Being a plant source of protein soybeans potentially could provide protein for animals in almost unlimited quantities. However, there are certain problems encountered in the feeding of soybean products to poultry. The research for this paper deals with the use of soybean the use of soybean protein in the diets of turkey poults. Isolated soy protein which is commonly used for purified diet studies contains factor(s) which cause reduced growth and a rachitic-like conditions of turkey …

The Competitive Effects Of Wild Buckwheat (Polygonum Convolvulus L.) On Spring Wheat (Triticum Vulgare L.), James Darrell Arnold

Electronic Theses and Dissertations

Infestation of wild buckwheat (Polygonum Convolulus L.) presents a serious problem on many acres of agricultural land, especially in the spring wheat growing areas. Wild buckwheat is an annual, the seeds of which germinate at the same time as the spring-sown wheat. The weed climbs on the wheat plant and is not effectively shaded by the crop. Wild buckwheat is not effectively controlled with phenoxy type herbicides. The most susceptible stage of growth for the wheat is the 5-leaf to early boot stage. Since the susceptible stage for the weed has passed before the crop reaches its tolerant stage, control …

Measurement Of Vertical And Horizontal Hydraulic Conductivities On An Undisturbed Soil Core, R. Kent Anderson

Electronic Theses and Dissertations

Permeability is the physical property of soil which enables it to pass or conduct air or water through is macropores. This should not be confused with the infiltration rate, a term expressing the rate at which water will enter the soil surface. Whereas the infiltration rate is influenced by the hydraulic slope, permeability is not (12, p. 153)*. A term which is often confused with permeability is hydraulic conductivity. Hydraulic conductivity is a velocity term, or (L/T), expressing the rate at which a fluid passes through the soil. The specific need for hydraulic conductivity and permeability measurements is to determine …

Fox-Prey Relationships In Eastern South Dakota, Robert L. Drieslein

Electronic Theses and Dissertations

Relationships between red foxes (Vulpes fulva) end their principal prey, particularly ring-necked pheasants (Phasianus colchicus), were studied on four units in eastern South Dakota from December 1964 to September 1966. Each unit was composed of a 100-square-mile "reduction area," on which fox populations were reduced, and a 100-square-mile "check area," on which fox populations were not reduced for the study. Indices to populations of foxes, pheasants, mice, eastern cottontails (Svlvilagus floridanus) and whitetail jackrabbits (Lepus townsendi) were obtained and used to evaluate food habits and the effect of predator reduction on prey populations. Four-hundred seventeen stomachs and 104 female reproductive …

Movement Of Forage Fishes In A South Dakota Stream, Thomas P. Felix

Electronic Theses and Dissertations

Movement patterns of Semotilus atromaculatus, Rhinichthvs atratulus, Campostoma anomalum and Catostomus commersoni were investigated in an eastern South Dakota stream for a period of one year. Electrofishing, fin clipping and a multiple census method were employed. Population structures were estimated for each species. Populations were considered unstable due to the occurrence of appreciable emigration and immigration between sampling periods. Differential size class mobility was established for all species. Species exhibited upstream movement tendencies during the summer and more random movement tendencies during the fall. Size classes of S.atromaculatus, R. atratulus, and C. anomalum showed differential upstream movement affinities. Considerable growth …

Seasonal Movements Of Prairie Grouse In South Dakota, Warren W. Jackson

Electronic Theses and Dissertations

From 1962 through 1966, 1,401 plains sharp-tailed grouse (Pedicecetes phasianellus jamesi) and greater prairie chickens (Tympanuchus cupide pinnatus) were trapped in Gregory and Lyman Counties in south-central South Dakota. Cannon-projected nets and funnel traps were used to capture prairie grouse on breeding grounds and winter baitsites. Some birds were marked with backtags and leg-markers. Movement information was obtained from field observations, hunter reports, sharp-tailed grouse collections, and by recapturing banded birds. Male birds moved less than two miles from winter baitsites to breeding areas; most movements over five miles were made by immature female birds. Seventy-seven percent of the hunter …

Comparison Of Two Cultures For Use In Preacidified Skimmilk For Cottage Cheese Manufacture, Daryl D. Boddicker

Electronic Theses and Dissertations

Curd formation in a cultured dairy product is brought about by the addition of a bacterial culture capable of producing lactic acid from lactose. The primary function of this culture is to produce sufficient lactic acid to cause coagulation of the caseinate system of skimmilk. A secondary function of the culture is the production of flavor compounds considered to be desirable in these products. The flavor compounds produced by the normal growth of citric acid fermenting organisms are water soluble, and are largely removed during washing of the Cottage cheese curd. Therefore, flavor compounds are normally added to the cheese …

The Influence Of Artificial Insemination In Three Midwestern States, Wendell Lee. Kucker

Electronic Theses and Dissertations

Increased productivity of dairy cattle depends in part upon genetic changes brought about by select ion. Because of the long generation interval and low reproductive rate, genetic improvement in dairy cattle is slow. For this reason, the accuracy and effectiveness of selection of sires is of utmost importance. Selection of sires plays a major role in the genetic improvement of dairy cattle since a sire can leave many more descendants than a female. Consequently, the use of outstanding males is important in the genetic advancement of the dairy cattle population in the upper mid west as well as throughout the …

Consumer Evaluation Of A New Low-Fat Spread-Type Dairy Product, Walter W. Wosje

Electronic Theses and Dissertations

For many years the dairy industry has been going through transitional period whereby many marketing and structural changes have resulted. Generally speaking, these changes have been advantageous to the dairy farmer. During the past years there has been a widespread and increasing interest in profitable means of utilization of dairy by-products. Because of their unique and high nutritional value, the most logical method of disposition of these by-products is, from the standpoint of the general welfare, in human food; generally this is also the most gainful method. The high nutritional value of these products also makes them valuable in feeding …

An Investigation Of The Ability Of An Individual To Perceive The Needs Of Others In A Group Setting, Herbert L. Notch

Electronic Theses and Dissertations

The study of group dynamics has always been fascinated to those interested in a group setting. While much as been done in this area, a still larger amount of knowledge lies un-sorted and mysterious in the realm of group behavior. When, and specifically, when one who transmits enthusiasm and a guiding hand to a group, attempts to understand its workings, dynamics enter the group. A group has been defined as the meeting of a number of people and their subsequent interaction1. Admittedly, social interaction does take place in a group, if the above definition is accepted. This interaction has to …

Effects Of Orally Administered Sodium D-Thyroxine Upon Pregnancy Progression In Euthyroid Rabbits And Its Effect Upon The Newborn, Gary A. Thibodeau

Electronic Theses and Dissertations

Many authorities believe that prophylactic treatment of idiopathic hypercholesterolemia will prevent atherosclerosis and plaque formation which almost always precedes clinical arteriosclerosis and subsequent degenerative heart disease. There has been intensive research investigation initiated to provide a pharmacologic agent that will lower elevated serum cholesterol levels in mammals including humans. Several hypocholesterolemic drugs are being tested at the present time, one of the most promising is the dextro-rotary isomer of thyroxine. This study was conducted not only to determine the effects of orally administered dextrothyroxine on pregnancy progression, but also to provide information for further investigations concerning alterations related to hypercholesterolemic …

A Study Of Seventh And Eighth Grade Home Economics Programs In South Dakota With Implications For Curriculum Development, Lacquita Olson Wagner

Electronic Theses and Dissertations

One of the basic requirements of curriculum building is a clear and concise understanding of social, economic and technological developments which influence the American way of life. In fact curriculum revision is needed because of these rapid changes which are often so rapid that the educator has difficultly interpreting their implications. A first step in curriculum reorganization according to Trump and Baynham involves an analysis of what is being tought and studied by students.9 It was with this thought in mind that the writer developed a questionnaire which was sent to teachers in the public schools teaching homemaking in the …

The Relationship Between Phosphorus And Zinc In Corn Plants, Edward J. Deibert

Electronic Theses and Dissertations

Zinc is one of the micronutrients required for plant growth. The plant requirement is very small in relation to the macronutrients: nitrogen, phosphorus and potassium. Even with a small plant requirement zinc deficiency is one of the more common micronutrient deficiencies. Zinc deficiency symptoms have been observed on a number of agricultural crops in many parts of the country including South Dakota. Zinc deficiency symptoms were first observed on corn in the south central part of the state in the late nineteen fifties. Since that time, deficiency symptoms have been observed with increasing frequency over several parts of the state. …

Ovine Phosphatic Urolithiasis, Don H. Bushman

Electronic Theses and Dissertations

A series of experiments was conducted using lambs and rats to determine the effect of various levels and sources of dietary phosphate on the incidence of phosphatic urinary calculi. Additional experiments were conducted to determine the degree of protection afforded sheep against urolithiasis by feeding various salts, and to determine the effect of these salts on excretion and retention of various ions. The lambs used in the sheep experiments were crossbred lambs weighing approximately 30 to 33 kg. They were fed a fattening ration consisting of ground shelled corn, alfalfa hay or silage (corn or sorghum) and soybean meal (approximately …

Cooperative Vocational Schools For South Dakota, Nicholas George Debilzan

Electronic Theses and Dissertations

The relative importance of this study is characterized by the following pertinent considerations: (1) the inability of communities to absorb unskilled labor, (2) the lack of salable skills of the high school graduates, (3) the prohibitive cost of providing vocational education on the necessary level to develop adequate skills, (4) the school drop-out problem, (5) the limited vocational education provided by the smaller school, (6) the industrial opportunities that can be provided by the larger cities of the state and (7) the need for a practical method of creating the necessary school entity. The economic make-up of the communities within …

The Effects Of Gamma-Irradiation On Seed Germination And Plant Stem Growth In Four Species Of Plants, George R. Halter

Electronic Theses and Dissertations

Today we are in the modern nuclear age of which several nations of the world have role. The United States is a forerunner in the world attempt to conquer the atom and its energy. The American concern in this field is primarily in three areas: (1) the harnessing of the nuclear energy for economic reasons, and (2) the magnitude of nuclear energy as a destructive threat, and (3) the resultant effects of ionizing radiation on biological organism. This study was pertinent to the third area listed above. It was concerned with the effect of gamma-irradiation on seed germination and its …

Genetic Parameters Among Production, Carcass Composition And Carcass Quality Traits Of Beef Cattle, Darrell A. Busch

Electronic Theses and Dissertations

There were 1,642,000 beef cows in South Dakota on_ January 1,1967, which was 14 percent higher than the 1961-65 average (South Dakota Crop and Livestock Reporting Service, 1967). These cows were valued at $307, 054, 000, a 27 percent increase over the 1961-65 average. There were 390, 000 head of cattle and calves on feed on January 1, 1967, a 33 percent increase over 1961 and a 22 percent increase over the 1961-65 average. The sale of cattle and calves has accounted for 44 percent of the cash farm income in South Dakota for the period 1958-65 and is the …

On The Nature Of Some Selenium Losses From Soils And Waters, Ghaleb Musa Abu-Erreish

Electronic Theses and Dissertations

Selenium is of interest to the animal nutritionists and to the biochemist from two standpoints. In some areas of the world it occurs in soils in excesses, and the plants growing in these soils contain levels of the element that are toxic to livestock that consume the plants. On the other hand, selenium appears to be essential to the well-being of certain animals, at least under some feeding regimens, and in a number of areas the soils produce feeds that are deficient in the element (48). In either case, an understanding of the cycling of selenium in nature is essential …

Inelastic Behavior Of Steel I-Beams With Hexagonal Web Cutouts, Teresa Chen Wang

Electronic Theses and Dissertations

In recent years plastic analysis has been widely used in structural design throughout the United States. It is based on the maximum load-carrying capacity of the structure. It offers a more realistic design approach than the conventional elastic methods, where the true factor of safety against ultimate strength can and does vary significantly from one structure to another.

The main objective of this study is to determine the maximum load-carrying capacity of steel I-beams with hexagonal web cutouts. When the cutouts are arranged as shown in Figure 1-a, the beam presents an appearance exactly as does a castellated beam. A …

Digestibility Studies With Western Wheat Grass, Marvin John Wurster

Electronic Theses and Dissertations

In order to make the most economical usage of our range forages it is essential that we know when the forage is most digestible in order for livestock to obtain maximum benefit from it. For many years cutting date has been the most common measure used to determine when a forage contains the most nutritive value. In many grasses emergence of the seed head or seed maturity has been used to determine when a particular forage should be harvested, However, western wheatgrass (Agropyron mithill) is not dependent on seed for reproduction and under range conditions often does not produce a …

An Investigation Of The Hydrologic Factors That Affect The Water Levels Of Lake Poinsett, Max Eugene Van Den Berg

Electronic Theses and Dissertations

In essence the purpose of this thesis is to determine the feasibility of controlling the Lake Poinsett surface elevation. The major objectives of the study were:
1. To weigh and evaluate the major factors that effect the water level of Lake Poinsett, 2. To determine a range of possible control elevations of the water surface, and,
3. To investigate a series of structures that could be used to control the fl ow in the natural outlet channel .

The Initial Year Of The Title I Program At Whittier Junior High School In Sioux Falls, South Dakota, Daniel A. Oursland

Electronic Theses and Dissertations

Title I is a program of aid to education under the auspices of the U.S. Department of Health, Education, and Welfare. This treatise will be concerned with the formulation and implementation of the Title I program at Whittler Junior High School in Sioux Falls, South Dakota, during the summer of 1966. The Title I program at Whittler Junior High ls one of the many innovations to be found in this program of federal aid to education. The range of programs acceptable under Title I is as great as the ingenuity of individual administrators and teachers. Of course, certain specifics must …

The Legal Aspects Of Civil Rights Sit-Ins And Parade Demonstrations, James Everett Voyles

Electronic Theses and Dissertations

No abstract provided.

A Glossary Of The Ancrene Riwle, Sue B. Beckham

Electronic Theses and Dissertations

No abstract provided.

A Critical Exposition Of Joseph Conrad's Heart Of Darkness, Jane Edel Lewis

Electronic Theses and Dissertations

No abstract provided.

A Study Of Some Reactions Of 2-Methyl-2-Propanesulfinic Acid Andits Derivatives, Henry Ellard Johnson Jr

Electronic Theses and Dissertations

No abstract provided.

A Cost-Revenue Approach To Balanced Land Use Development Related To Comprehensive Planning, Gerald George Newman

Electronic Theses and Dissertations

No abstract provided.

Mundonovismo In The Poetry Of Ruben Dario, Morris Vincent Mutzi

Electronic Theses and Dissertations

No abstract provided.

An Economic Survey Of Disposable Clothing / By Vaughn Eugene Varnado, Vaughn Eugene Varnado

Electronic Theses and Dissertations

No abstract provided.