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Articles 30571 - 30600 of 35945
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Frontal Chromatography : Studies Of Additive Effects On Infinitely Dilute Solutes, Theodore Newton Westlake Iii
Frontal Chromatography : Studies Of Additive Effects On Infinitely Dilute Solutes, Theodore Newton Westlake Iii
Electronic Theses and Dissertations
No abstract provided.
Development Of A Music Curriculum For Mississippi County Community College In Blytheville, Arkansas, Gilbert Clarence Sommers
Development Of A Music Curriculum For Mississippi County Community College In Blytheville, Arkansas, Gilbert Clarence Sommers
Electronic Theses and Dissertations
No abstract provided.
A Study Of Charge Probe Response On A Junction Of Unequal Radiithin Wires / By Santiago Singarayar, Santiago Singarayar
A Study Of Charge Probe Response On A Junction Of Unequal Radiithin Wires / By Santiago Singarayar, Santiago Singarayar
Electronic Theses and Dissertations
No abstract provided.
Paracompactness And Related Covering Properties In Moore Spaces, Virginia Matthews Buchanan
Paracompactness And Related Covering Properties In Moore Spaces, Virginia Matthews Buchanan
Electronic Theses and Dissertations
No abstract provided.
Use Of Stockpods For Nesting By Giant Canada Geese, Paul M. Bultsma
Use Of Stockpods For Nesting By Giant Canada Geese, Paul M. Bultsma
Electronic Theses and Dissertations
A study of giant Canada geese (Branta canadensis maxima) nesting on stockponds in western South Dakota was conducted during 1974 and 1975. Analysis of 10 selected variables at nests on natural sites indicated that distance of water below high water level and percent slope from wetland to horizon, contributed the most to the use of the site. Distance from wetland to horizon and disturbance factors were two important variables measured to determine use of artificial nesting structures. First nests were initiated on 1 April 1974 and 8 April 1975. Twenty-five nests (16 percent) were located on artificial nesting structures, and …
The Aquatic Ecology Of Two Seasonal Marshes In Eastern South Dakota, Walter K. Donaldson
The Aquatic Ecology Of Two Seasonal Marshes In Eastern South Dakota, Walter K. Donaldson
Electronic Theses and Dissertations
Zooplankton, benthos, nekton, aufwuchs, and the physical-chemical limnology of two seasonal marshes in eastern South Dakota were monitored from April-June 1975. Bothwell and Lund Marshes contained water from 15 April-July 1975. The dominant i. ons, Ca ++, Mg+ +, and sulfate, made the water hardness non-carbonate. Floating vegetation, Lemna trisulca and Cladophora sp., became abundant in both marshes during the first week of June, and formed large thick mats by the end of June 1975. Daphnia pulex was the dominant zooplankter in Bothwell Marsh and made up 33% of the zooplankton density during the 1975 season. The population was triacmic, …
Analysis Of Aerial Surveys And Tolerance Of Landowners For A Canada Goose Flock In Northeastern South Dakota, Thomas C. Tacha
Analysis Of Aerial Surveys And Tolerance Of Landowners For A Canada Goose Flock In Northeastern South Dakota, Thomas C. Tacha
Electronic Theses and Dissertations
Four hundred rural landowners were interviewed in Day and Marshall counties in South Dakota in 1974 and 1975. These 400 interviews included 200 interviews with landowners living within 6.4 km of the three major summer-fall goose concentration areas and 200 interviews from a random sample of landowners living in the study area. Eighty-six percent of the interviewed landowners indicated that it was a good idea to expand the northeastern South Dakota Canada goose flock from 2,000 to 5,000 birds. Only 6 percent of the landowners had complaints about the geese, despite the fact that 23.5 percent of them had received …
An Evaluation Of The Fishery Resource In A Portion Of The James River, South Dakota Scheduled For Channel Modification, Dennis Tol
Electronic Theses and Dissertations
The fish populations of a 193 km (120 mi) section of the James River between Tacoma Park and Redfield, South Dakota that is scheduled for stream modification under the Oahe Irrigation project were evaluated from October 74 to July 76. Twenty-two species of fish were captured in the James River between Tacoma Park and Redfield, South Dakota. The fishes use the area primarily as a spawning ground and nursery for young-of-the-year. Evidence of spawning was found for 19 species of fish. Only a residual population of forage fishes, young-of-the-year of various species, and a few adult black bullheads attempt to …
Productivity Of A Resident Giant Canada Goose Flock In Northeastern South Dakota, J. David Hilley
Productivity Of A Resident Giant Canada Goose Flock In Northeastern South Dakota, J. David Hilley
Electronic Theses and Dissertations
. A 2-year study (1974-1975) of a resident Canada goose (Branta canadensis maxima) flock is reported. Twenty-four percent of the artificial nest structures (ANS) available were used by nesting geese. Artificial nesting structures, islands, muskrat houses and peninsulas were used by geese as nesting sites. Mean clutch size of completed nests was 5.14 in 1974 and 5.26 in 1975. Mean clutch size was 5.38 on ANS and 4.89 on NNS for the 2-year study. At least one egg hatched in 87 percent of the 283 nests located during the study. Larger clutches had a higher hatchability. Nest success was greater …
Sharp-Tailed Grouse Nesting And Brooding Habitat In Southwestern North Dakota, Stanley C. Kohn
Sharp-Tailed Grouse Nesting And Brooding Habitat In Southwestern North Dakota, Stanley C. Kohn
Electronic Theses and Dissertations
The habitat of nesting and brooding sharp-tailed grouse (Pedioecetes phasianellus) was studied 1 April to 25 August 1973 and 1974. The objective of the study was to determine the quality and quantity of vegetation at nest and brood locations of sharp-tailed grouse in relation to available vegetation within pastures. Five range sites, lowland draw, rolling grassland, upland grassland, rocky outcropping, and claypan were studied. Thirty-four females were trapped on dancing grounds and equipped with radio transmitters. Seventeen nests were located by monitoring the movements of transmitter-equipped hens and 26 nests were located through use of cable-chain drag. Height of vegetation …
Factors Influencing Habitat Use By Breeding Waterfowl In South Dakota, Michael R. Mcenroe
Factors Influencing Habitat Use By Breeding Waterfowl In South Dakota, Michael R. Mcenroe
Electronic Theses and Dissertations
Wetland characteristics, adjacent upland conditions, and corresponding waterfowl populations were surveyed on 500 quarter sections in 125 clusters proportionally stratified within eight physiographic strata in South Dakota. Two survey were conducted, one in May and a second in June, each year during 1973 and 1974. Habitat variables of each wetland and of each quarter section, respectively, were analyzed for each species of waterfowl through multiple regression analysis. Multiple regression equations had highest coefficients of determination for mallards (Anas platyrhynchos), pintails (Anas acuta), blue-winged teal (Anas discors), and gadwall (Anas strepera). Coefficient of determination for these species were greatest in the …
Distribution, Age, And Growth, And Feeding Ecology Of Paddlefish (Polyodon Spathula) In Unaltered Missouri River, South Dakota, Rudolph S. Rosen
Distribution, Age, And Growth, And Feeding Ecology Of Paddlefish (Polyodon Spathula) In Unaltered Missouri River, South Dakota, Rudolph S. Rosen
Electronic Theses and Dissertations
Four hundred eighty-four paddlefish (Polyodon spathula) were captured 26 June 1975 to 11 August 1976 from an unaltered stretch of Missouri River in South Dakota. Vital statistics were measured on all fish, 171 were sacrificed during the analysis of food habits, and 301 fish were tagged and released. Paddlefish were located by observation, gill netting, and snagging. Paddlefish were primarily found downstream from submerged sandbars from late spring to early fall. The crests of the sandbars were 0.1 to 1.0 m deep and immediately downstream, the depth was 1.5 to 4.5 m, and the current velocity was 0 to 0.3 …
Free Fatty Acids Associated With Induced Rancidity In Cream And Butter, John Alan Anderson
Free Fatty Acids Associated With Induced Rancidity In Cream And Butter, John Alan Anderson
Electronic Theses and Dissertations
One of the most significant problems in the dairy industry today is the flavor defect known as rancidity. This defect has been recognized for some time, but recent trends in milk handling have increased the problem of rancidity. Recently the dairy industry on the farm has changed to the increased use of pipeline milkers and bulk handling of milk. Processing plants are becoming larger and more centralized, resulting in more movement over longer distances for the raw product. These changes result in increased foaming and agitation of the milk, contributing to the rancidity problem. The butter industry has changed. Butter …
The Vascular Flora Of Ordway Prairie Mcpherson County, South Dakota, Barry L. Hertz
The Vascular Flora Of Ordway Prairie Mcpherson County, South Dakota, Barry L. Hertz
Electronic Theses and Dissertations
The vascular vegetation of Ordway Prairie, a preserve maintained by The Nature Conservancy as an example of virgin prairie in McPherson County, South Dakota, was studied to determine its present composition. The sample comprised representatives of each species recognized in each of the 13 square-mile sections within the prairie, collected in 1975 and 1 9 7 6 . Three hundred nine different species, representing 170 genera in 55 plant families were found. One thousand six hundred forty five permanent herbarium specimens, serving as vouchers for their distribution, are now in the herbarium of South Dakota State University .
Physiologic And Embryologic Studies Of The Yellow (Ay/A) Mouse, Gerald R. Cizadlo
Physiologic And Embryologic Studies Of The Yellow (Ay/A) Mouse, Gerald R. Cizadlo
Electronic Theses and Dissertations
Mice heterozygous for the dominant AY gene have a yellow coat plus an altered metabolism which results in diverse physiologic characteristics including a greatly increased amount of carcass fat, a longer body and tail length, slightly more muscle mass, increased feed efficiency, increased susceptibility to spontaneous and induced tumor growth, and reproductive inefficiency in females. Homozygous AY animals die in utero. The mutation produces a lesion which is potentially valuable as an investigative· tool for the study of physiologic mechanisms and relationships of diverse metabolic pathways. Several experiments were performed to gain information concerning the AY effect. Rate of oxygen …
Drip And Sprinkler Irrigation Of Carrots And Onions, James D. Melstad
Drip And Sprinkler Irrigation Of Carrots And Onions, James D. Melstad
Electronic Theses and Dissertations
Many specialty crops, especially vegetables, are shallow rooted and sensitive to periods of moisture stress. This makes irrigation of vegetables necessary to their production in South Dakota since summer rainfall is normally both inadequate and undependable. A study was initiated in conjunction with the South Dakota Agricultural Experiment Station and the Water Resources Institute to evaluate irrigation of specialty crops in eastern South Dakota. Drop and sprinkler irrigation were utilized for the irrigation of two specialty crops presently grown in South Dakota, carrots and onions. The study was initiated with the following objectives: 1. To compare carrots and onion yields …
Factors Associated With The Acceptance By Nursing Students Of Role Functions As Characteristic Of An Expanded Role For Nurses, Sharon Leech Hofland
Factors Associated With The Acceptance By Nursing Students Of Role Functions As Characteristic Of An Expanded Role For Nurses, Sharon Leech Hofland
Electronic Theses and Dissertations
A study of graduating nursing students was conducted to determine: (1) the extent to which these students would be willing to accept specified role functions as characteristic of an expanded role for nurses; and (2) what factors are associated with and seem to explain the graduating nursing students' acceptance of these specified role functions as characteristic of an expanded role for nurses. An interview schedule was developed, pretested, and administered to students enrolled in their final year of study at one of the nine schools with state board approved programs for Registered Nurse licensure. The interview schedule included questions relating …
Bovine Ocular Squamous Cell Carcinoma : In Vitro Investigations Of A Viral Etiology, Mary A. Anson
Bovine Ocular Squamous Cell Carcinoma : In Vitro Investigations Of A Viral Etiology, Mary A. Anson
Electronic Theses and Dissertations
Bovine ocular squamous cell carcinoma, commonly known as cancer eye, is a common and economically important problem to the U.S. cattle industry. This neoplasm is particularly significant in aged breeding stock. The tumor usually originates from the squamous epithelial cells of the corneal-scleral junction and the nicitating membrane of the eye. Eye cancer lesions progress from small pin point plaques to large tumors involving the eye and surrounding tissue. This disease causes parital or total loss of vision in the affected eye and the cancer may metastasize. The objectives of this research were to: investigate the properties of tumor cell …
High-Rate Infiltration-Percolation Treatment Of Wastewater To Satisfy Effluent Requirements, Dayton H. Alsaker
High-Rate Infiltration-Percolation Treatment Of Wastewater To Satisfy Effluent Requirements, Dayton H. Alsaker
Electronic Theses and Dissertations
The treatment of wastewater to alleviate our freshwater needs and protect the environment at a reasonable cost is a major problem in the world today. The application of partially-treated wastewater to the land may be one method of solving this problem. Land application is neither a new concept, nor one that will solve all treatment problems, but it is likely to play an ever-increasing role in water pollution control planning. The Water Resources Institute at SDSU sponsored the project in its initial year of 1974. During this time much of the construction of the three infiltration percolation basins was completed. …
Enumeration And Low Temperature Storage Of Obligately Anaerobic Bacteria In Convenience Foods, Craig Edward Bremmon
Enumeration And Low Temperature Storage Of Obligately Anaerobic Bacteria In Convenience Foods, Craig Edward Bremmon
Electronic Theses and Dissertations
The present study was undertaken to determine the kinds and numbers of obligate anaerobes possibly present in various frozen and refrigerated commercial convenience foods. Also, known numbers of pathogenic species of obligate anaerobes were added to various convenience foods and stored at refrigeration and freezing temperatures to determine their die-off or loss in viability. The conditions investigated included the effects of different organisms, different foods, different temperatures, and various storage time periods. The results of this investigation demonstrate to food producers as well as consumers that the possibility does exist for the presence of non-sporeforming obligate anaerobes in frozen or …
Investigation On Several Aspects Of The Epidemiology And Control Of Yellow Leaf Spot On Wheat, Fred L. Bode
Investigation On Several Aspects Of The Epidemiology And Control Of Yellow Leaf Spot On Wheat, Fred L. Bode
Electronic Theses and Dissertations
Yellow leaf spot, caused by Pyrenophora trichostoma (Fr.) Fckl., (Helminthosporium tritici repentis Died.) an ascomycetous fungus of widespread distribution, has played a minor role in the complex of foliar diseases afflicting Triticum species in South Dakota. However, with the introduction of cultural practices that leave large amounts of crop residue in the soil surface, the possibility exists that it may become a serious threat to wheat production in the Northern Great Plains region of the United States. This paper is a report of research on several aspects of the epidemiology and control of yellow leaf spot on wheat, with the …
Computer Simulation Of Livestock Housing Design, Leslie Lloyd Christianson
Computer Simulation Of Livestock Housing Design, Leslie Lloyd Christianson
Electronic Theses and Dissertations
Computer simulation requires theoretical and empirical mathematical relationships describing different aspects of heat and moisture transfer for livestock confinement buildings. Relationships with various degrees of sophistication exists that adequately describe these heat and moisture transfers. Using these relationships with climatic data, environmental requirements, construction characteristics, material properties and economic data, a computer technique can be developed to mathematically model energy requirements for operating confinement livestock environments. This technique should base ventilation rates on moisture removal, temperature control and animal comfort criteria to minimize unnecessary energy consumption. However, no such computer model currently exists that determines and employs optimal ventilation rates …
Compositional And Metabolic Evaluation Of Colostrum Preserved By Four Methods During Warm Ambient Temperatures, Susan Mary Annexstad Carlson
Compositional And Metabolic Evaluation Of Colostrum Preserved By Four Methods During Warm Ambient Temperatures, Susan Mary Annexstad Carlson
Electronic Theses and Dissertations
A study of giant Canada geese (Branta Canadensis maxima) nesting on stock ponds in western South Dakota was conducted during 1974 and 1975. Analysis of 10 selected variables at nests on natural sites indicated that distance of water below high water level and percent slope from wetland to horizon, contributed the most to the use of the site. Distance from wetland to horizon and disturbance factors were two important variable measured to determine use of artificial nesting structures. First nests were initiated on 1 April 1974 and 8 April 1975. Twenty-five nests (16 percent) were located on artificial nesting structures, …
Concerns About Journalism Education : A Content Analysis Of Selected Academic Journals And Trade Publications Published In 1955, 1965, And 1975, Michael J. Bugeja
Concerns About Journalism Education : A Content Analysis Of Selected Academic Journals And Trade Publications Published In 1955, 1965, And 1975, Michael J. Bugeja
Electronic Theses and Dissertations
Journalism educators must consider an automated, technical news industry and burgeoning enrollments when tey review their educational programs. Traditionally, journalism educators are devoted to endowing their graduates with a good liberal arts education, besides training them for career work in the media. However, like all industries of our modern age, the news industry today is automated and more technically complex than ever. Training students for career work has also become more complex. Qualified instructors must teach students about the new machinery of mass communication and still devote enough time to liberal arts to make them conscientious journalists. Can journalism educators …
Host Specificity And Nitrogen Fixation By Rhizobia From Native Legumes Of South Dakota, Myron C. Fixation
Host Specificity And Nitrogen Fixation By Rhizobia From Native Legumes Of South Dakota, Myron C. Fixation
Electronic Theses and Dissertations
This these is concerned with a study of the study of the root nodule bacteria associate with native legumes. In the study cultural characteristics were observed along with physiological properties of the native bacterial isolates. These were compared with known rhizobium cultures. Cross inoculation studies were done to see in the rhizobia were specific or had a wide host range. Nitrogen fixation was determined by the Kjeldahl and acetylene reduction methods to determine the amount of nitrogen fixed by the symbiosis of bacterial isolates with the host plant and other legume species.
Electrical Safety In The Hospital, William Ray Engle
Electrical Safety In The Hospital, William Ray Engle
Electronic Theses and Dissertations
Electrical safety has become n important part of hospital management. The potential danger to patients and staff has increased, as health care becomes more sophisticated. Due to the unique situation that exists in hospitals, most hospital personnel do not understand the problems that occur. The problem is greater in smaller hospitals that do not have the time, money or qualified personnel to deal with the problem. Hospital electrical safety is not a complex problem. A basic safety program can be initiated if the personnel have a basic understanding of electricity and its effects on the body. Many nurses in the …
The Development Of Validated Metric Teaching Materials : Length, Joanne Parry Dankey
The Development Of Validated Metric Teaching Materials : Length, Joanne Parry Dankey
Electronic Theses and Dissertations
The purpose of the present study was to develop a Metric Length self-instructional program to teach adult male and female consumers how to use the meter, the basic unit of length in the metric system. The goal of the project was to create a self-paced program containing instructional materials that were totally individualized. The researcher chose this approach because adult education programs have found individualized instruction to be very effective. Self-instructional programming has been found to be effective for mastery level learning. The goal of this program is to help consumers think metric and to use these units in their …
Chromosome Constitution Of The Plants Induced From Callus Culture Of The Daylily Hemercallis Flava L., Yvonne C. Goeden
Chromosome Constitution Of The Plants Induced From Callus Culture Of The Daylily Hemercallis Flava L., Yvonne C. Goeden
Electronic Theses and Dissertations
Variations in chromosome number and/or structure were reported to occur in long-term cultures (Heinz, Mee and Nickell, 1969; Heinz and Mee, 1971; Horak, Lustinec, Mesicek, Kaminek and Polackova, 1975; Kao, Miller, Gamborg, and Harvey, 1970; Nitra and Steward, 1961; Sacristan, 1971; Singh and Harvey, 1975a and b; Torrey, 1959). No change of chromosome number was found in the callus tissue or in the plants induced from the callu of Hemeocallis flava L. subcultured for six months (Chen and Holden, 1972). In this study, karyotype of the plants derived from a callus culture of H. flava, which had been subcultured for …
The Auditory Sensitivity Of The Coyote (Canis Latrans), Kim Darwin Hanson
The Auditory Sensitivity Of The Coyote (Canis Latrans), Kim Darwin Hanson
Electronic Theses and Dissertations
The objective of this study, then was to determine the auditory sensitivity of the coyote so that optimal repellant frequencies might be selected for further study. The procedures, apparatus, and methodology that were developed for measuring the audiogram using two different approaches are discussed in the following text. The first approaches was to use changes in respiratory patterns as an indicator of the coyote’s auditory sensitivity. The second was to determine the audiogram using operant behavioral techniques.
The Effect Of Rate And Source Of Nitrogen And Cutting System On Bromegrass, Ron Henry Gelderman
The Effect Of Rate And Source Of Nitrogen And Cutting System On Bromegrass, Ron Henry Gelderman
Electronic Theses and Dissertations
An objective of this research was to study the effects of three N fertilizers, including a slowly available N source, on the growth of a cool-season grass. The effect of cutting systems on the productivity of this grass was also studied to better evaluate the effect of N treatments. Factors examined were: dry matter produced, percent crude protein of the forage, forage mineral composition, and plant nitrogen uptake. Cool-season grass production is influenced by many factors; among these are the stage of growth at harvest and the amount and source of nitrogen (n) fertilizer applied. These factors will be discussed …