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Articles 9151 - 9180 of 9652
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Biology And Ecology Of False Wireworms In South Dakota (Coleoptera: Tenebrionidae), Carrol Otto Calkins
Biology And Ecology Of False Wireworms In South Dakota (Coleoptera: Tenebrionidae), Carrol Otto Calkins
Electronic Theses and Dissertations
False wireworms were important pests of wheat on the Great Plains during the early 20th century. Until recently, they were of little importance; however, they are now occasionally appearing in damaging proportions. The purpose of studying the biological and ecological aspects of these insects in South Dakota was to understand the factors responsible for their demise and the circumstances that could affect the recurrence of damaging populations. The more common species of false wireworms found in South Dakota during this study were Eleodes suturalis (Say), E. opaca (Say), E. hispilabris (Say), E. tricostata (Say), E. extricata (Say), E. obsoleta (Say), …
The Aesthetic Possibilities Of Combining Relief Sculpture And Painting, Michael Roy Dean
The Aesthetic Possibilities Of Combining Relief Sculpture And Painting, Michael Roy Dean
Electronic Theses and Dissertations
No abstract provided.
A Method Of Moments Analysis Of The Rectangular Loop Antenna, Frazier Earl Fyke
A Method Of Moments Analysis Of The Rectangular Loop Antenna, Frazier Earl Fyke
Electronic Theses and Dissertations
No abstract provided.
Distribution Of Soil And Litter Arthropoda In A Secondary Plantsuccession In North Mississippi, Charles Morris Cooper
Distribution Of Soil And Litter Arthropoda In A Secondary Plantsuccession In North Mississippi, Charles Morris Cooper
Electronic Theses and Dissertations
No abstract provided.
The Development And Testing Of A Fire Simulator Exercise, Don A. Clymer
The Development And Testing Of A Fire Simulator Exercise, Don A. Clymer
Electronic Theses and Dissertations
A forest fire simulation exercise was developed for the purpose of supplementing forest fire instruction, presenting students with decision-making situations encountered on forest fires, and introducing them to the fire simulator at Stephen F. Austin State University. The final exercise was developed after preliminary work and development of a more simple exercise. The problems with equipment, recruitment of simulator personnel, and the development and execution of the simulator exercises are discussed. Scheduling adequate time for practice, and providing adequate personnel training were found to be the major obstacles in simulator use. Future fire simulator use at SFA will be dependent …
Vegetative Propagation Of Green Ash By Softwood Cuttings, Wesley Alvin Urdahl
Vegetative Propagation Of Green Ash By Softwood Cuttings, Wesley Alvin Urdahl
Electronic Theses and Dissertations
Because of the devastation caused by Dutch Elm Disease to American elm an expanding avenue of. research is the quest for a replacement for the elm. Since green ash is native throughout Eastern United States and Great Plains, is easy to transplant, and grows rapidly while young, increased emphasis has been placed on this tree as a possible replacement. Green ash is the most widely ranging of American ashes. It develops into a small to medium-sized tree with a broad, irregular crown. It is exceptionally cold and drought hardy and once established will persist. It is necessary to use vegetative …
Primary Production And Nutrient Limitation In Two Prairie Lakes, Roger A. Steinberg
Primary Production And Nutrient Limitation In Two Prairie Lakes, Roger A. Steinberg
Electronic Theses and Dissertations
Two eutrophic northern prairie lakes, Lake Cochrane and Lake Hendricks, were sampled regularly for chemical characteristics, temperature, transparency, phytoplankton and zooplankton populations. Primary production was determined by the "light" and "dark" bottle technique. Values for the 1971 summer study period ranged from a low of 59.l7 mg C fixed/m2/hr. to a high of 296,67 with a mean of 151.67 for Lake Cochrane. Values for Lake Hendricks ranged from 25.00 to 194.17 with a mean of 110.83. The possibilities of nutrient limitation were investigated through nutrient enrichment experiments in the field. Production was generally not enhanced and was sometimes inhibited by …
Germination And Vegetative Propagation Of Native Prairie Forbs, James T. Sorensen
Germination And Vegetative Propagation Of Native Prairie Forbs, James T. Sorensen
Electronic Theses and Dissertations
In the late 1960's and early 1970's there arose an increased awareness of the ecological relationships of nature to man. Although this relationship has been known for some time and numerous books have been written on the subject, public awareness has been slow in coming. But for some unknown reason man has taken a turn to nature. He is becoming more involved with conservation of nature and appreciative of its aesthetic beauty. With this new awareness there has come a new era of camping, hiking, and riding, to mention only a few activities which man needs or wants to enable …
A Design For Advanced Preparation Of Educational Researchers. (Volumes I And Ii), Fon R. Belcher
A Design For Advanced Preparation Of Educational Researchers. (Volumes I And Ii), Fon R. Belcher
Electronic Theses and Dissertations
Statement of the problem. The central problem of this study was twofold: (1) to determine whether the educational research preparation offered by selected colleges and universities bore out the findings of critics, and (2) to synthesize and synergize opinions and facts regarding educational research, as expressed by men active in the field, into a flexible proposal whereby individual student's programs in research preparation could be "custom-made" to suit their most obvious research needs. (Abstract shortened.)
A Design For Advanced Preparation Of Educational Researchers. (Volumes I And Ii), Fon R. Belcher
A Design For Advanced Preparation Of Educational Researchers. (Volumes I And Ii), Fon R. Belcher
Electronic Theses and Dissertations
Statement of the problem. The central problem of this study was twofold: (1) to determine whether the educational research preparation offered by selected colleges and universities bore out the findings of critics, and (2) to synthesize and synergize opinions and facts regarding educational research, as expressed by men active in the field, into a flexible proposal whereby individual student's programs in research preparation could be "custom-made" to suit their most obvious research needs. (Abstract shortened.)
Impulse Voltage Characteristics Of Class 155a °C To 220a °C Solid Insulating Materials, George C. Morfiris
Impulse Voltage Characteristics Of Class 155a °C To 220a °C Solid Insulating Materials, George C. Morfiris
Electronic Theses and Dissertations
The drastic increase in the ratings of power apparatus in recent years, as a, result of rapidly increased power needs, has brought about dramatic developments in electrical insulation. As voltage and power ratings increased, while size reduction and higher efficiencies were sought, temperatures which insulations must withstand without losing their characteristics also increased. In an effort to produce insulations with higher thermal and electrical properties, insulation manufacturers began producing electrical insulations utilizing synthetic high polymers, phenolic, and other thermosetting resins and silicones. The result has been a series of advanced insulation systems which the has been so rapid that a …
Attitudes Of Registered Nurses In Designated South Dakota Hospitals Toward Aspects Of Terminal Patient Care And Euthanasia, Sharon Ann Hofland
Attitudes Of Registered Nurses In Designated South Dakota Hospitals Toward Aspects Of Terminal Patient Care And Euthanasia, Sharon Ann Hofland
Electronic Theses and Dissertations
The problem under investigation in this study is: "What are the attitudes of professional nurses in designated hospitals in South Dakota toward the practice of passive and active euthanasia, and how do these attitudes vary when controlled for selected social and institutional factors?" Research related to this problem is important in that recent permissive legislative action on the abortion issue caught the nursing profession unprepared, and it is presently attempting to establish a position. To avoid a similar situation on the euthanasia issue, data regarding the current attitudes of nurses concerning the preservation of life and the management of the …
Developmental Analyses Of Biochemical Fuel Cells, Roderick James Mcneil
Developmental Analyses Of Biochemical Fuel Cells, Roderick James Mcneil
Electronic Theses and Dissertations
One of the newest areas of biological research, bioelectrochemistry, involves the production of electrical energy through the action of an enzymatic catalyst on a specific substrate. Previous research in the field of bioelectrbchemistry has led to controversy concerning the mechanisms of microbial (enzymatic) activity for power production. It is the purpose of this study to demonstrate whether particular microorganisms or their associated enzyme fractions are indeed responsible for the electrical activity observed in a biochemical fuel cell (BFC). The microorganisms and their associated enzyme systems utilized in this study are as follows: 1. Asperqillus niger - glucose oxidase (1.1.3.4 B-D-Glucose: …
Production Of Staphylococcal Enterotoxin B In Foods With Varied Environmental Conditions, Robert Jefferey Heidelbauer
Production Of Staphylococcal Enterotoxin B In Foods With Varied Environmental Conditions, Robert Jefferey Heidelbauer
Electronic Theses and Dissertations
The number one cause of food poisoning is enterotoxin produced by certain strains of Staphylococcus aureus. Knowledge of the conditions which inhibit enterotoxin production in foods is of great economic importance. Previous research on staphylococcal food poisoning has been concerned with the presence and growth of Staphylococcus aureus in foods. Until recently, little work has been done with detection of the toxin in foods, even though proof of responsibility for the poisoning depends on direct demonstration of enterotoxin in the food. Before research on enterotoxin production could be feasible a rapid method of detection was needed. Early detection techniques involved …
A Follow-Up Study Of Adult Home-Economics-Related Occupational Courses Conducted In South Dakota, 1968-1969, Sandra Jenter Hanson
A Follow-Up Study Of Adult Home-Economics-Related Occupational Courses Conducted In South Dakota, 1968-1969, Sandra Jenter Hanson
Electronic Theses and Dissertations
The objective of this study was to investigate the adult home economics related occupational courses conducted in South Dakota during the 1968-1969 school term. At the time this study was initiated, there were no specific criteria for adult occupational classes in vocational education for South Dakota. Classes were offered for persons who had already entered the labor market and who needed training or retraining to achieve stability or advancement in employment. Class enrollment, length of time for the course, and/or charge per hour depended on the objectives of the class and the type of class offered. Classes could have been …
Properties Of Six South Dakota Bovine Picornaviruses, Janet Marie Mattson
Properties Of Six South Dakota Bovine Picornaviruses, Janet Marie Mattson
Electronic Theses and Dissertations
Since the first enterovirus isolates in 1957 and rhinovirus isolation in 1962, more than 600 isolations of bovine picornaviruses have been reported. Previous workers have been concerned primarily with serological comparisons among their own isolates. Only two viruses, LCR4 and BEV I, are available to investigators for serologic comparison. Picornaviruses have been isolated from animals with. respiratory diseases, diarrhea, and histories of abortions. Interest has not been that great because of the vast number of strains isolated, and at present, the studied strains have no disease attributed to them. Little has been done with these strains of virus except to …
Effects Of Erythropoietin On Intestinal Iron Absorption In Rabbits, Thomas John Hajek
Effects Of Erythropoietin On Intestinal Iron Absorption In Rabbits, Thomas John Hajek
Electronic Theses and Dissertations
Erythropoietin ls a mammalian hormone synthesized primarily by renal tissues ln response to tissue hypoxia. the hormone accelerates erythropoiesis, the process of red blood cell (erythrocyte) production, Increasing oxygen transport to tissue cells. Accelerated erythropoiesis implies an increased rate of hemoglobin synthesis and, therefore, an increased demand for iron, which ls an integral part of the hemoglobin molecule. Iron, to meet this requirement, may be obtained by mobilizing storage iron or by enhancing dietary iron absorption. That erythropoiesis promotes increased absorption of dietary iron has been delineated. However, the actual mechanism involved has not been elucidated completely. It has been …
Mechanism And Regulation Of Nitrogen Assimilation In Klebsiella Pneuminiae M5al, Ming- Liang Li
Mechanism And Regulation Of Nitrogen Assimilation In Klebsiella Pneuminiae M5al, Ming- Liang Li
Electronic Theses and Dissertations
The pathway of the nitrogen atom after the initial nitrogen fixation reaction has taken place is not known. This study is an attempt to learn something about the enzymes that are involved in amino acid synthesis. The cell has varying demands for the intermediary metabolites of nitrogen, as the processes of protein and other polymer synthesis vary. In addition, the cell is often confronted with changing supplies of nitrogen and energy, as a function of environmental change. Efficient growth depends upon the optimum utilization of metabolites in response to variation in cellular needs. The bacterium Klebsiella pneumoniae not only has …
Modified Dugdale Model, Prem Chandra Gupta
Modified Dugdale Model, Prem Chandra Gupta
Electronic Theses and Dissertations
A precise determination of the influence of plastic yielding on the deformation and failure at a crack tip is needed for accurate predictions of the behavior of cracked bodies under static load large enough to cause fracture, and subcritical repetitive loads which cause fatigue. The catastrophic growth of cracks in plates under monotonically increasing load depends on a number of factors. A general view concerning the behavior of material at the leading edge of a crack is that plastic flow and subsequent fracture of the material is influenced by factors such as strain hardening, strain rate, the state of stress, …
A Comparison Between Selected Weight Training Exercises And Ring Machine Training For The Development Of Iron Cross Strength, Joseph Anthony Leskoske
A Comparison Between Selected Weight Training Exercises And Ring Machine Training For The Development Of Iron Cross Strength, Joseph Anthony Leskoske
Electronic Theses and Dissertations
Gymnastic rules specify that a routine on the still rings should contain one strength move of at least medium difficulty. The iron cross and any of its variations fulfills this requirement. The investigator believes the iron cross is a "required elective" in any still ring routine whether the competition be regional, national, or international. A study of eighteen state high school gymnastic meets, 1969, 1970, 1971, reveals that all the state champion ring men performed the iron cross. Also, the top six ring men of the NCAA 1970 Championship performed this move. The cross is seemingly an integral move in …
Instructional Television In The Brookings, South Dakota, Elementary Schools, Jonell M. Kinyon
Instructional Television In The Brookings, South Dakota, Elementary Schools, Jonell M. Kinyon
Electronic Theses and Dissertations
This paper intends to determine if instructional television is widely used in the Brookings, South Dakota, elementary schools. It also attempts to determine what attitudes Brookings elementary teachers have about instructional television. Instructional television (ITV) is a modern-day teaching tool available and used in most schools. The cost to the individual school district is minimal after receiving sets have been purchased. Supplementary materials go with the programs and are available to the school from the public television station. A school may purchase any or none of the material it chooses. The advantages of instructional television are many, as will be …
Determination Of Salmonella Species In The Big Sioux River And Development Of A Quantitative Most Probable Number Method, Myung Hyun Kim
Determination Of Salmonella Species In The Big Sioux River And Development Of A Quantitative Most Probable Number Method, Myung Hyun Kim
Electronic Theses and Dissertations
In recent years the pollution problems in rivers and lakes have forced the Federal Water Pollution Control Administration to issue requirements for minimum water standards for each State with an interstate stream. Since the Big Sioux River is an interstate river, studies are needed to determine its quality. According to the South Dakota Committee on Water Pollution, water pollution in South Dakota originates from agricultural, municipal, and industrial wastes. For the Big Sioux River, the municipal and meat-processing wastes are the important sources of pollution. Little is known of the sanitary bacteriological quality of rivers and lakes in South Dakota. …
An Expression Of Hybrid Vigor And A Characterization Of Callus Tissue Of Zea Mays L., Judy Winkler Johnson
An Expression Of Hybrid Vigor And A Characterization Of Callus Tissue Of Zea Mays L., Judy Winkler Johnson
Electronic Theses and Dissertations
It is theoretically possible to culture any tissue from any plant or animal, but little work has been done on the major grain crops, especially Zea mays, because they are monocotyledons and present special problems in tissue culturing because of their slow growth. This thesis reports an attempt to grow and redifferentiate callus tissue of corn. The objectives of the research were: (1) to test the ability of different inbred and hybrid corn varieties to form callus and (2) to characterize the callus cell ultrastructure. Since so much is known about corn on the genetic level, it is appropriate to …
A Study Of Selected Demographic Factors Associated With Changes In The Aged Population Of South Dakota, 1960-1970, Bruce Gordon Breamer
A Study Of Selected Demographic Factors Associated With Changes In The Aged Population Of South Dakota, 1960-1970, Bruce Gordon Breamer
Electronic Theses and Dissertations
This study will attempt to investigate the following problem: What changes have transpired in the population aged 65 years and over in South Dakota from 1960 to 1970, and how do these changes very when associated with and controlled for selected demographic variables? The objectives of this thesis are as follows: 1. To determine the changes that have occurred in the population of South Dakota aged 65 and over from 1960 to 1970. 2. To analyze the changes that have occurred in the population of South Dakota aged 65 and over from 1960 to 1970 by comparing them to the …
Extent Of Use Of Learning Packages And Their Acceptance By South Dakota Home Economics Teachers And Pupils, Marlene Bleeker Brands
Extent Of Use Of Learning Packages And Their Acceptance By South Dakota Home Economics Teachers And Pupils, Marlene Bleeker Brands
Electronic Theses and Dissertations
The purpose of this study· was to determine the extent to which home economics teachers in South Dakota were using learning packages. A second purpose was to determine teacher and pupil reaction to package teaching and learning. Of the 200 home economics teachers responding to the· teacher questionnaire, 72 or 36 percent indicated they had used learning packages during the 1970-71 school year. There was no significant difference among teachers with varying years of teacher experience as to whether or not they used packages. CAPSULES were the major source or type of learning package used by home economics teachers in …
The Biology Of Geomylichus Gaomydis N. Sp. (Acari: Listrophoridae) From The Plains Pocket Gopher, Geomys B. Bursarius (Shaw), Charles Campbell Coffman
The Biology Of Geomylichus Gaomydis N. Sp. (Acari: Listrophoridae) From The Plains Pocket Gopher, Geomys B. Bursarius (Shaw), Charles Campbell Coffman
Electronic Theses and Dissertations
Geomylichus geomydis n. sp. is an obligate ectoparasite and associated with it on Geomys b. bursarius were large numbers of four other major ectoparasite species and small numbers of eight miscellaneous acarine taxa. Descriptions and measurements of life cycle stages of Geomylichus geomydis n. sp. are given. Geographical and host distribution records are also included. Seasonal population numbers of Geomylichus geomydis n. sp. and the other four major ectoparasite species were analyzed. Infestation rates for G. geomydis n. sp. were determined for seasons of the year and sexes and ages of the host. A least-squares analysis of variance was used …
A Study Of The In Vitro Drug Availability Of Various Brands Of Prednisolone Tablets, Robert E. Northern
A Study Of The In Vitro Drug Availability Of Various Brands Of Prednisolone Tablets, Robert E. Northern
Electronic Theses and Dissertations
No abstract provided.
Bionomics Of Mallophaga Of Sharp-Tailed Grouse In South Dakota, Major L. Boddicker
Bionomics Of Mallophaga Of Sharp-Tailed Grouse In South Dakota, Major L. Boddicker
Electronic Theses and Dissertations
The ecologies of chewing lice (Insecta:Mallophaga) which parasitize sharp-tailed grouse, Pedioecetes phasianellus, were studied in southwestern South Dakota from 1964 to 1967. Five hundred twenty-eight hens, cocks and chicks were collected and examined for louse damage. Louse populations were monitored each month from December, 1964, to September, 1967. Five louse species which infested grouse in the study area were Goniodes nebraskensis Carriker, Amyrsidea megalosoma Overgaard, Lagopoecus perplexus Kellogg and Chapman, Goniocotes chrysocephalus and Lipeurus maculosis Clay. Goniodes nebraskensis fed on feather parts and skin debris and was found to have seasonally fluctuating populations. Cocks carried peak populations of 250 lice/host …
The Role Of Rainfall Impact And Surface Flow In Soil Detachment And Transport, Robert Alan Young
The Role Of Rainfall Impact And Surface Flow In Soil Detachment And Transport, Robert Alan Young
Electronic Theses and Dissertations
Soil erosion caused by rainfall is a very complex physical process. To evaluate the mechanism of erosion so that an assessment can be made of the extent to which it may be controlled necessarily begins with an understanding of the basic fundamental factors involved. The purpose of this study involves the development of an insight of the relative importance of the roles played by various contributors to the erosion process. Particular emphasis is placed on the contribution of rainfall detached soil to total soil loss. Three soil types, Barnes loam, Crofton silt loam and Central sandy loam, were prepared with …
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson
Electronic Theses and Dissertations
The main objectives of this White River Basin study were to analyze flow variation records, to investigate existing river water quality data as compared with the designated beneficial uses for the basin and to consider the influence of present and future irrigation development. Data were collected from a number of sources and brought together for interpretation with respect to these objectives. The streamflow study utilizes the streamflow records from 10 gaging stations in the White River Basin. It is expected that the results of this investigation may be of assistance to the South Dakota Water Resources Commission and the South …