Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Life Sciences (1959)
- Arts and Humanities (1123)
- Social and Behavioral Sciences (1031)
- Physical Sciences and Mathematics (782)
- Medicine and Health Sciences (763)
-
- Engineering (582)
- Animal Sciences (502)
- Education (439)
- Biology (430)
- Environmental Sciences (309)
- Psychology (289)
- Ecology and Evolutionary Biology (258)
- Biochemistry, Biophysics, and Structural Biology (246)
- Microbiology (205)
- Chemistry (200)
- Anthropology (192)
- Natural Resources and Conservation (178)
- Medical Sciences (176)
- Plant Sciences (176)
- Pharmacy and Pharmaceutical Sciences (162)
- English Language and Literature (158)
- Molecular Biology (158)
- History (157)
- Dairy Science (153)
- Communication (152)
- Sociology (139)
- Creative Writing (137)
- Art and Design (134)
- Civil and Environmental Engineering (124)
- Religion (120)
- Institution
- Keyword
-
- College of Arts Humanities and Social Sciences (196)
- College of Natural Science and Mathematics (78)
- Morgridge College of Education (68)
- Education (59)
- Daniel Felix Ritchie School of Engineering and Computer Science (57)
-
- Joint Ph.D. Program in Study of Religion (52)
- Biological Sciences (48)
- Gender (47)
- Fiction (41)
- Rhetoric (41)
- Anthropology (38)
- Inflammation (38)
- Poetry (37)
- Technology (37)
- Cancer (36)
- Art (35)
- Communication (34)
- Psychology (34)
- English and Literary Arts (33)
- Phenomenology (32)
- Josef Korbel School of International Studies (30)
- Memory (30)
- Ecology (29)
- Ethics (29)
- Health and environmental sciences (29)
- Apoptosis (28)
- Film (28)
- Race (27)
- Stress (27)
- Identity (26)
- Publication Year
Articles 7171 - 7200 of 8975
Full-Text Articles in Entire DC Network
Neutron Activation Analysis For Trace Metal Content Of Brookings Sludge For Land Application, Daniel George Dewall
Neutron Activation Analysis For Trace Metal Content Of Brookings Sludge For Land Application, Daniel George Dewall
Electronic Theses and Dissertations
The Federal Environmental Protection Agency (EPA) strongly favors land application of sludge as a disposal method and requires communities to consider the application of sewage wastes to land as one of their alternatives to advanced wastewater treatment in order to be eligible for federal funding to improve sewage wastewater treatment facilities. Although use of sewage sludge on the land has definite benefits, several potential problems may develop when applying this method of disposal. One main concern has been the possibility of toxic metal pollution occurring in the application soils. If high concentrations of zinc, copper, lead, cadmium, etc. are present …
Acute Effects Of Neuroleptics And Benzodiazepines On Quantitative Measures Of Discriminative Motor Control In Rats, Gregory Lampton Nail
Acute Effects Of Neuroleptics And Benzodiazepines On Quantitative Measures Of Discriminative Motor Control In Rats, Gregory Lampton Nail
Electronic Theses and Dissertations
No abstract provided.
Toward The Prediction Of Binge Eating, Barbara Ann Casasa
Toward The Prediction Of Binge Eating, Barbara Ann Casasa
Electronic Theses and Dissertations
No abstract provided.
Children's Beliefs About Death : A Study Of Program Effectiveness / By Jeanne Marie Roy, Jeanne Marie Roy
Children's Beliefs About Death : A Study Of Program Effectiveness / By Jeanne Marie Roy, Jeanne Marie Roy
Electronic Theses and Dissertations
No abstract provided.
Architectural Significance In The Nineteenth-Century American Novel: Cooper, Hawthorne, And Howells, Delois Loyd Gates
Architectural Significance In The Nineteenth-Century American Novel: Cooper, Hawthorne, And Howells, Delois Loyd Gates
Electronic Theses and Dissertations
No abstract provided.
Nietzsche's Methodology : Masks And Perspectivism, Charles Anderson Cox
Nietzsche's Methodology : Masks And Perspectivism, Charles Anderson Cox
Electronic Theses and Dissertations
No abstract provided.
Schedule Sensitivity In Humans : Effects Of Schedule Order And Verbal Behavior, Robin L. Levine
Schedule Sensitivity In Humans : Effects Of Schedule Order And Verbal Behavior, Robin L. Levine
Electronic Theses and Dissertations
No abstract provided.
Charles Wilkins Short : Kentucky Botanist And Physician, 1794-1863., Deborah Susan Skaggs 1949-
Charles Wilkins Short : Kentucky Botanist And Physician, 1794-1863., Deborah Susan Skaggs 1949-
Electronic Theses and Dissertations
Charles Wilkins Short (1794-1863) participated in the evolution of a scientific community in the United States. His interests in botany began when he was a student at the University of Pennsylvania (M.D. 1815). As a country doctor in western Kentucky (1817-1825), then as professor of materia medica at Transylvania University in Lexington, Kentucky (1825-1838), and the Louisville Medical Institute (later University of Louisville, 1838-1849), and finally in retirement, Short devoted himself'to the classification of flora of his native state and region. In 1828 Short co-founded The Transylvania Journal of Medicine and the Associate Sciences, in which he published many of …
Soil Studies Educational Unit And Soil Reconnaissance Survey Of Piney Woods Conservation Center, Consuelo Garcia Campos Klotz
Soil Studies Educational Unit And Soil Reconnaissance Survey Of Piney Woods Conservation Center, Consuelo Garcia Campos Klotz
Electronic Theses and Dissertations
A soil reconnaissance survey was conducted on 2,500 acres adjacent to Sam Rayburn Reservoir, in the Angelina National Forest, San Augustine County, the future site of the proposed Piney woods Conservation Center. Data from the soil reconnaissance survey was interpreted and organized into a soil studies educational unit to be used to familiarize teachers with a variety of soils and their properties. Five of the eight soils were integrated into the study unit which is a portion of the total outdoor education and conservation program to be developed for the Piney Woods Conservation Center.
A Comparison Of Videotape And Line Voice Teaching Of Blissymbols, Hilda Elizabeth Welsch
A Comparison Of Videotape And Line Voice Teaching Of Blissymbols, Hilda Elizabeth Welsch
Electronic Theses and Dissertations
No abstract provided.
The James River Highlands : An Area Study, Thomas P. Welch
The James River Highlands : An Area Study, Thomas P. Welch
Electronic Theses and Dissertations
This thesis is a systematic-area geographical analysis of the James River Highlands (figure 1). It is comprised of a ridge-bordered section of the James River located in the Southern-most part of the James River Basin. The Highlands is a teardrop shaped area approximately 35 miles in diameter. The James River Highlands consist of a group of three ridges, varying in elevation from 1, 255 to 1, 440. feet above sea level. The ridges consist of drift covered bedrock that partially block the southern end of the James River Basin. The three ridges are the most conspicuous features of the heavily …
Energy Analysis Of Small-Scale Ethanol Distillation, Scott Stampe
Energy Analysis Of Small-Scale Ethanol Distillation, Scott Stampe
Electronic Theses and Dissertations
Steam consumption associated with the small-scale fractional distillation of ethanol at the South Dakota State University Alcohol Fuels Research Facility has been determined. During 1981, seven, ten, and thirteen percent ethanol concentrations in corn-beer were distilled to a 92.5 percent fuel ethanol product. Residual ethanol concentrations in spent stillage were studied at average levels of 0.13, ' 0.15, and 0.30 percent by volume. The total system energy requirement averaged 3.88 rnegajoules per liter (13,900 Btu per gallon) of anhydrous-equivalent ethanol, exclusive of boiler efficiency. Emperical relationships were established between the distillation energy requirement and two operating parameters. These parameters were …
The Effect Of Photoperiod On Reproduction Of Targhee Ewes, Richard D. Rogen
The Effect Of Photoperiod On Reproduction Of Targhee Ewes, Richard D. Rogen
Electronic Theses and Dissertations
Seasonality of reproduction in sheep has created an oscillating supply of lambs. A more constant supply of lambs would allow more efficient use of facilities and labor by producers, feedlots and packing plants. Seasonal reproduction also limits the lifetime production of the ewe. Extension of the breeding season would provide a more consistent supply of lambs. In addition, more than one lamb crop per ewe could be produced annually. Not only the yearly lamb production but also the lifetime production of the ewe would then be increased. Also, the generation interval would be shortened allowing faster herd improvement. It is …
Protein Supplementation As Related To Protein Sources For Growing And Finishing Lambs, Luis Fernando Palmer
Protein Supplementation As Related To Protein Sources For Growing And Finishing Lambs, Luis Fernando Palmer
Electronic Theses and Dissertations
The production of high-quality foods continues to offer an important challenge to livestock producers and animal scientists. People in many countries of the world consume diets which are inadequate in quantity and quality of nutrients. The animal industry plays a major role as a supplier of high-quality foods such as meat, milk and eggs for human nutrition. Protein is perhaps the most important nutrient provided by animal products because of its quality and availability in relation to human needs. Ruminants such as cattle and sheep have the unique ability to convert low quality feedstuffs to high quality food as animal …
Plants Poisonous To Livestock In Botswana, Pearl Dijeng Motsepe
Plants Poisonous To Livestock In Botswana, Pearl Dijeng Motsepe
Electronic Theses and Dissertations
Livestock plant poisoning is very common in Botswana. Two plants, Dichapetalum cymosum and Pavetta harborii, are especially notorious for causing large-scale mortality in some areas of the country. In 1975, for instance, a D. cymosurn poisoning outbreak killed 210 cattle in east central Botswana. In the same year P. harborii caused large-scale deaths of cattle in the Mochudi area. The losses caused alarm among livestock farmers and the problem was among the issues discussed in the 1975 session of the Botswana Parliament. Because of their potency, farmers in South Africa refer to these species as "sudden death 11 plants. Unlike …
Geographically Based Selection Of Urban Street Trees For Brookings, South Dakota, James James Mikkelson
Geographically Based Selection Of Urban Street Trees For Brookings, South Dakota, James James Mikkelson
Electronic Theses and Dissertations
The purpose of this study is to develop a systematic method of selecting tree species for urban street planting in a specific community. The city of Brookings, South Dakota, provides the physical setting for the study. Brookings is a city of 15,000 people located in the east central part of the state near the Minnesota border. As implied above, this study employs geographic methods to determine which tree species are most suitable for street planting in Brookings. The particular problems encountered in the process of selecting urban street trees are especially suited to the skills of the geographer. Carl Sauer …
Immunotoxic Effects Of Pentachlorophenol In Mice, Linda J. Lee
Immunotoxic Effects Of Pentachlorophenol In Mice, Linda J. Lee
Electronic Theses and Dissertations
The objectives of this investigation was to determine the effects of ingested pentachlorophenol (PCP) on immunological parameters in mice. Specific immunotoxic effects of PCP were determined using the results of total and differential white blood cell counts, electrophoretic serum protein profiles, hemagglutination antibody titers, Jerne plaque assays of antibody-forming cells, and lymphocyte stimulation assays. Combined ~vivo effects were ascertained by observing any alteration in the susceptibility of mice when challenged by a Gram negative pathogen. The diverse industrial and agricultural application of pentachlorophenol results in the exposure of a large fraction of the population to this pesticide. It is used …
High Performance Imagery : The Use Of Prose Poetry In James Welch's Riding The Earthboy 40 And Winter In The Blood, Sidner J. Larson
High Performance Imagery : The Use Of Prose Poetry In James Welch's Riding The Earthboy 40 And Winter In The Blood, Sidner J. Larson
Electronic Theses and Dissertations
James Welch's combining of poetry and prose has given him a unique language with which to record his impression of life. In addition, welch has an excellent sense of reality that gives life to his writing. His rendition of lonely rural Montana is valid for much of interior America, and he is a master at tracing the implications of life in similar situations for all people who live with distance and harshness. one of the qualities I respect most about Riding the Earthboy 40, Winter in the Blood, and The Death of Jim Loney is that they communicate movingly about …
The Changing Impact Of Natural Disasters In Brookings County, South Dakota, Linda K. Hillestad
The Changing Impact Of Natural Disasters In Brookings County, South Dakota, Linda K. Hillestad
Electronic Theses and Dissertations
This study takes an in-depth look at the various kinds of natural disasters that have affected one small piece of the world and their changing impact over the last century. The site chosen for this research is Brookings County, located in east-central South Dakota. Though occupying only· a minute speck of the earth's 196,940,400 square-mile surface, it has been the recipient of many violent acts of nature. In order to begin the investigation, it was necessary to identify those hazards common to Brookings County. The county is extremely fortunate that it does not need to contend with the problems of …
The Effects Of Excess Arginine On Lysine Utilization In Rats And Swine, David L. Hagemeier
The Effects Of Excess Arginine On Lysine Utilization In Rats And Swine, David L. Hagemeier
Electronic Theses and Dissertations
The objective of adding supplemental protein to swine diets is to provide the levels of available essential amino acids and nitrogen necessary for maximum protein synthesis in the pig. Lysine has been determined to be the limiting amino acid in many swine diets. Thus, the real objective of protein supplementation is to provide the amount of lysine necessary for maximum protein synthesis, and if this objective is met the requirements for the other essential amino acids and nitrogen will generally be met. Since swine diets are formulated to meet the lysine requirement of the pig, it is necessary to derive …
Farm-Scale Production Of Fuel Ethanol And Distillers' Wet Grains From Corn And Corn-Whey Mixtures, William Ray Gibbons
Farm-Scale Production Of Fuel Ethanol And Distillers' Wet Grains From Corn And Corn-Whey Mixtures, William Ray Gibbons
Electronic Theses and Dissertations
Since the Arab oil embargo of 1973, we have become increasingly aware of the finite nature of our petroleum supplies. Current studies estimate that our supplies of petroleum will be depleted in the next 25 to 50 years. As supplies diminish and prices rise, we will need alternate forms of energy to take up the slack. One of the leading alternatives is the use of biomass in the production of liquid fuel that is, conversion of cellulose, starch, glucose, or other carbohydrates to ethanol. In the United States, the fuel ethanol industry is still in its infancy. Approximately a dozen …
South Dakota Burn Injuries : Description And Analysis, Sheila Kay Frederick
South Dakota Burn Injuries : Description And Analysis, Sheila Kay Frederick
Electronic Theses and Dissertations
The purpose of the study was to investigate the extent and nature of burn injuries in South Dakota. Interior product burn injuries were given special attention. A major objective was to compare and contrast burn injuries in a rural agrarian area to an urban area. Data from a previous study done in Boston, Massachusetts was used for comparison. The population consisted of all persons receiving burn. injuries in South Dakota from July 1, 1979, through June 30, 1980. There were 384 burn injuries in South Dakota in the study time period. Because of the relative small size of the population, …
A Socio-Demographic Description Of South Dakota State University Undergraduate Physical Education Majors, Michael M. Christensen
A Socio-Demographic Description Of South Dakota State University Undergraduate Physical Education Majors, Michael M. Christensen
Electronic Theses and Dissertations
The purpose of this study is to describe selected socio demographic characteristics of South Dakota State University undergraduate physical education majors. At present little is known about the socio-demographic characteristics of South Dakota State University’s physical education majors their personal characteristics and past experiences, their interests, their future career plans, major influences on their choices, and other characteristics. However, there is substantial evidence concerning the personality characteristics of physical education students and teachers. Gruber and Perkins studied the personality traits of women physical education majors and non-majors. Ruffer studied personality traits of undergraduate physical education students using the Sixteen Personality …
Repeatability Of Cow Efficiency, Weaning Weight And Milk Production In Angus, Charolais And Reciprocal Cross Cows, Brent A. Buckley
Repeatability Of Cow Efficiency, Weaning Weight And Milk Production In Angus, Charolais And Reciprocal Cross Cows, Brent A. Buckley
Electronic Theses and Dissertations
In this day of increasing population and decreasing natural resources, man must continually search for more efficient methods of producing foodstuffs. The livestock industry must continue to improve its efficiency of production to remain a profitable producer of protein for the human populace. The pork and poultry industry have increased their efficiency of production through extensive use of cereal grains which could be utilized as human foodstuffs. Beef cattle, on the other hand, have the capability to utilize high roughage feedstuffs, such as grasses or crop residues, which are unavailable for human digestion. The beef cow, in particular, spends the …
The Occurrence And Effects Of Entomophaga Grylli On Grasshopper Populations In South Dakota, Roger Allen Bohls
The Occurrence And Effects Of Entomophaga Grylli On Grasshopper Populations In South Dakota, Roger Allen Bohls
Electronic Theses and Dissertations
The effect of Entomophaga grylli on grasshopper populations within South Dakota was investigated during a 2-year period. Field observations established that the state's 3 most important species of grasshoppers are susceptible to pathotype 2 infections. Outbreaks are believed to be initiated annually from the soil of undisturbed areas which act as the reservior for Entomophaga grylli resting spores. The occurrence of the fungus in regions of the state receiving 355 mm of rain during the growing season indicate pathotype 2 infection is maintained in dry environments. However, detailed epizootiol ogical studies of the fungus are needed before the potential of …
"Thy Lord Dwells" : Man, Society, And Nature In Selected English Country-House Poems, W. Andrew Alexander
"Thy Lord Dwells" : Man, Society, And Nature In Selected English Country-House Poems, W. Andrew Alexander
Electronic Theses and Dissertations
This study examines seven country-house poems of the seventeenth century: Ben Jonson’s “To Penshurst” and “To Sir Robert Wroth”, Thomas Carew's “To My Friend G. N., From Wrest" and “To Saxham”, Robert Herrick's “A Panegerick to Sir Lewis Pemberton”, Andrew Marvell's Upon Appleton House, and John Dryden's “To My Honor'd Kinsman, John Driden of Chesterton". It also briefly takes up three poems of the early eighteenth century: Alexander Pope’s “Second Satire of the Second Book of Horace, Paraphrased”, his “Epistle to Bathurst”, and his "Epistle to Burlington". All of the authors of these poems were very conscious of their cultural …
Mammal Damage And Movements Of Deer Mice In South Dakota Shelterbelts, Thomas G. Barnes
Mammal Damage And Movements Of Deer Mice In South Dakota Shelterbelts, Thomas G. Barnes
Electronic Theses and Dissertations
A study was initiated to examine animal damage to new shelterbelts in Brookings County, South Dakota. Feeding preferences of deer mice (Peromyscus maniculatus) prairie voles (Microtus ochragaster), and cottontail rabbits (Sylvilagus floridanus) was conducted on 5 woody species that colIIIllonly occur in South Dakota shelterbelts. Movementsof deer mice were studied in a mature shelterbelt using a smoked kymograph tracking technique. Green ash (Fraxinus pennsylvanica Marsh.), tatarian honeysuckle (Lonicera tatarica L. ),, and common lilac (Syringa vulgaris L.) were the most common tree species encountered in this study. Of the trees examined, 398 (8. 9%) sustained animal damage over the winter. …
Distribution, Movement, And Temperature Selection Of Adult Walleye And Muskellunge In A Power Plant Cooling Reservoir, Jerry A. Younk
Distribution, Movement, And Temperature Selection Of Adult Walleye And Muskellunge In A Power Plant Cooling Reservoir, Jerry A. Younk
Electronic Theses and Dissertations
Distribution and habitat selection of five adult walleyes (Stizostedion vitreum vitreum) and one adult muskellunge (Esox masquinongy), in a power plant cooling reservoir, were determined using temperature-sensitive ultrasonic transmitters, A total of 342 locations were obtained during the monitoring period (1 May-13 November 1981). Walleyes exhibited a seasonal distribution pattern; inhabiting the discharge area during the cooler months and the intake area during the warmer months, Summer-fall home ranges of three walleyes were estimated, Maximum home ranges (maximum area covered by an individual) were overlapping and similar in size, ranging from 36, 7-45, 9 ha, Estimates of utilized areas (intensively …
Aquatic Plant Communities And Invertebrates In A Prairie Pothole During Duck Brood Rearing, Jeffrey W. Mccrady
Aquatic Plant Communities And Invertebrates In A Prairie Pothole During Duck Brood Rearing, Jeffrey W. Mccrady
Electronic Theses and Dissertations
More than 1,100 samples of aquatic plants and associated invertebrates were collected in a prairie wetland. Sampling was done weekly throughout the duck brood rearing season. Linear regression revealed a 4 to 100 ratio of animal to plant biomass (R²=0.488). Comparatively high degrees of association were found between Ceratophyllum demersum and Gastropoda and between Lemna minor and most zooplankton groups. Significant sources of variation in invertebrate biomass were plant communities, date, plants, and community by date interaction. Depth and communities were not significant.
Food Habits And Placental Scar Counts Of Bobcats In South Dakota, David Eric Nomsen
Food Habits And Placental Scar Counts Of Bobcats In South Dakota, David Eric Nomsen
Electronic Theses and Dissertations
Bobcat (Lynx rufus) food habits and placental scar counts were investigated in western South Dakota during 1978-79 and 1979-80 trapping and hunting seasons. Food habits were recorded by frequency of occurrence and placental scar counts were used to determine litter size for South Dakota bobcats. Rabbits (Sylvilagus spp. and Lepus spp.), rats and mice (primarily Microtus spp. and Peromyscus spp.), and deer (Odocoileus spp.) were identified in 56, 32, and 7% of bobcat stomachs, respectively. Analysis showed that rabbits, rats and mice, and deer occurred in 58, 36, and 9% of bobcat intestines, respectively. Occurrences in rabbits decreased from 67% …