Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Life Sciences (1953)
- Arts and Humanities (1122)
- Social and Behavioral Sciences (1029)
- Physical Sciences and Mathematics (782)
- Medicine and Health Sciences (762)
-
- Engineering (582)
- Animal Sciences (501)
- Education (438)
- Biology (428)
- Environmental Sciences (309)
- Psychology (288)
- Ecology and Evolutionary Biology (257)
- 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 (138)
- Creative Writing (136)
- 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 7561 - 7590 of 8968
Full-Text Articles in Entire DC Network
An Analysis Of The Wooden Sculpture From The Western Sudan In The Fulton Collection, Patricia Ann Johnston
An Analysis Of The Wooden Sculpture From The Western Sudan In The Fulton Collection, Patricia Ann Johnston
Electronic Theses and Dissertations
No abstract provided.
Criticism Of The Liberal Intellectual In The Political Fiction Of Mary Mccarthy, Terrill Hyde Huntington
Criticism Of The Liberal Intellectual In The Political Fiction Of Mary Mccarthy, Terrill Hyde Huntington
Electronic Theses and Dissertations
For more than thirty years, Mary McCarthy has served as the conscience of the liberal American intellectual. McCarthy’s method of writing is satire, and she treats both her sympathetic and unsympathetic characters satirically. The characters in her fiction are generally liberal intellectuals who follow one of two patterns. The sympathetic characters are those who, despite their flaws, endeavor to be conscientious, objective and truth seeking. They are plagued by self-doubt and constant awareness o their own limitations. In contrast, her unsympathetic characters are egotistical and self-deluding. Their intellectual capabilities are bent not toward fulfillment of their liberal and humanitarian ideals, …
Effect Of Manganous Toxicity On Certain Blood Parameters Of Sheep, Farrokh Rohani
Effect Of Manganous Toxicity On Certain Blood Parameters Of Sheep, Farrokh Rohani
Electronic Theses and Dissertations
This investigation is designed to provide new information concerning the effects of toxic levels of manganese on the following blood components of sheep: plasma and erythrocyte (red blood cells) iron and manganese; erythrocyte and leucocyte (white blood cells) counts; hemoglobin concentrations and packed cell volumes; Wintrobe indices; differential counts and body weights.
A Retreat From Chaos : The Agrarianism Of Andrew Nelson Lytle, Franklin Neill Walker
A Retreat From Chaos : The Agrarianism Of Andrew Nelson Lytle, Franklin Neill Walker
Electronic Theses and Dissertations
No abstract provided.
Distribution Of Formicidae In Three Seral Communities In North Mississippi, Shannon Mary West
Distribution Of Formicidae In Three Seral Communities In North Mississippi, Shannon Mary West
Electronic Theses and Dissertations
No abstract provided.
A Survey Of Bryozoan Species And Ecology In Two Northern Mississippi Flood Control Reservoirs, John Withrow Burris
A Survey Of Bryozoan Species And Ecology In Two Northern Mississippi Flood Control Reservoirs, John Withrow Burris
Electronic Theses and Dissertations
[No abstract provided.]
The Influence Of The Idea Of Progress On The Curriculum Theories Of Experimentalism, Essentialism, And Reconstructionism, Christopher R. Clarke
The Influence Of The Idea Of Progress On The Curriculum Theories Of Experimentalism, Essentialism, And Reconstructionism, Christopher R. Clarke
Electronic Theses and Dissertations
Abstract Not Available.
The Influence Of The Idea Of Progress On The Curriculum Theories Of Experimentalism, Essentialism, And Reconstructionism, Christopher R. Clarke
The Influence Of The Idea Of Progress On The Curriculum Theories Of Experimentalism, Essentialism, And Reconstructionism, Christopher R. Clarke
Electronic Theses and Dissertations
Abstract Not Available.
Reclamation Of Orphan Strip Mined Land In Southern Illinois And Western Kentucky : A Field Study Of The Palzo Project Of Williamson County, Illinois And The Clear Creek Swamp Of Webster And Hopkins Counties, Kentucky., Clara Ann Leuthart 1946-
Reclamation Of Orphan Strip Mined Land In Southern Illinois And Western Kentucky : A Field Study Of The Palzo Project Of Williamson County, Illinois And The Clear Creek Swamp Of Webster And Hopkins Counties, Kentucky., Clara Ann Leuthart 1946-
Electronic Theses and Dissertations
The areas studied exhibit different aspects of the problem of orphan strip mines. The Palzo tract is a 192 acre parcel of orphan land in southern Illinois that is being reclaimed by incorporating sewage sludge into the spoil and seeding. Seven sampling stations were established along Sugar Creek which drains the Palzo area. Six of these stations were well above the area to be reclaimed. The seventh was located below the area receiving acid mine drainage. A study of Cairn's, Simpson's, Patten's, Margalef's, Menhinick's, and Wilhm and Dorris' diversity indices at the stations showed that such indices are misleading and …
The Effects Of Selected Pesticides On Ten Isolates Of Terrestrial Algae., Martha Scheer Salk 1945-
The Effects Of Selected Pesticides On Ten Isolates Of Terrestrial Algae., Martha Scheer Salk 1945-
Electronic Theses and Dissertations
Ten algal isolates were obtained from soil into axenic culture and placed into defined media containing from 0 to 50 ppm of DDT, 2, 4-D,2,4,5-T, rotenone, or malathion (in two purities, 95 and 99%). For nine of the isolates, growth was measured photometrically every two weeks for a period of two months. Because of the twisted growth form, of the tenth isolate, a visual estimation was used to measure its growth over the same period of time. The results of the experiments in the light were as follows: 1) 2,4-D and 2,4,5-T were generally neutral in their growth effects. However, …
Terraces In North-Central Mississippi, Charlie Burnell Whitten
Terraces In North-Central Mississippi, Charlie Burnell Whitten
Electronic Theses and Dissertations
No abstract provided.
Effects Of Atrazine On Penned Pheasants And The Occurrence Of Stress Marks On Feathers, Thomas Orin Melius
Effects Of Atrazine On Penned Pheasants And The Occurrence Of Stress Marks On Feathers, Thomas Orin Melius
Electronic Theses and Dissertations
Doses of 4 g of atrazine (AAtrex) were not lethal to penned hen pheasants (Phasispus colchicus), but levels of 6, 8, 10 and 12 g induced mortality. Pen studies to determine the effects of atrazine on reproduction of hen pheasants were conducted with two replicates of the basic test. Birds were administered treatment levels of 0, 100, 200, or 400 mg of atrazine per hen per week. Egg production and gain in weight of hens were unaffected by the treatments. Replicate A eggs were unaffected by the treatments. Replicate A eggs were unaffected in shell thickness and pipping rates, while …
Food Habits Of Young-Of-The-Year Fishes In Abbey Pond, South Dakota, Randall D. Radant
Food Habits Of Young-Of-The-Year Fishes In Abbey Pond, South Dakota, Randall D. Radant
Electronic Theses and Dissertations
Food habits of young-of-the-year largemouth bass (Micropterus salmoides), bluegill (Lepomis macrochirus), black crappie (Pomoxis nigromaculatus), yellow bullhead (Ictalurus natalis), and yellow perch (Perca flavescens) were studied during 1973 and 1974 in Abbey Pond, South Dakota. Organisms found in young-of-the-year fish stomachs and in plankton samples were identified and counted in the laboratory. Zooplankton, aquatic insects and fish were the most important food organisms consumed by young fishes. Using Ivlev’s electivity index food electivity by the fishes for zooplankton was calculated. The size-specific food habits of young-of-the-year largemouth bass progressed from entomostracans to aquatic insects to fish. In most cases zooplanktons …
Factors Affecting The Development Of Lipase Flavor In Butter, Lawrence I. Bell
Factors Affecting The Development Of Lipase Flavor In Butter, Lawrence I. Bell
Electronic Theses and Dissertations
Current trends in the dairy industry have resulted in an increase in the incidence of lipase flavored butter. Raw cream, fresh and aged 24 h, was divided into 3 fractions and heat treated at temperatures of 72 C, 85 C, and 93 C. Each fraction of cream was churned into butter, with the butter divided and stored at -28. 9 C and 4.4 C. Lipase flavor development was measured organoleptically, by acid degree value (ADV), and free fatty acids (FFA) using a colorimetric procedure. Age of the cream had a significant effect (P< .01) on FFA and. ADV .levels, whereas heat treatment .of the cream had a significant effect (P< .01) on flavor only. Storage time had a significant effect (P< .01) on FFA, ADV, and flavor and the temperature of storage had a significant effect (P< .01) on FFA ·and flavor. Correlation between FFA and ADV was 0.86. There was no correlation between flavor and either JTFA or ADV
Effect Of Rhenium On Nitrogenase Activity Of Azotobacter Effect Of Rhenium On Nitrogenase Activity Of Azotobacter Vinelandiiinelandii, Stephen L.R. Erdody
Effect Of Rhenium On Nitrogenase Activity Of Azotobacter Effect Of Rhenium On Nitrogenase Activity Of Azotobacter Vinelandiiinelandii, Stephen L.R. Erdody
Electronic Theses and Dissertations
In recent years the biochemical aspects of molybdenum have come under increasing investigation. One phase of the investigation has centered on the function of Mo in nitrogenase enzymes. One way to study the biochemical function of an element with another which may mimic its function. A vanadium containing mitrogenase from Aztobacter vinalaudii has been prepared which displays properties indicative of replacement of the Moo by V. Attempts to prepare an active tungsteu analog have been unsuccessful as W exhibits an inhibitory effect. It has been suggested that rhenium analogs of Mo-nitrogenase rather than V or W, should be more useful …
Effects Of Manganese Chloride On Blood Formation In Rabbits, Donald Wayne Kerr
Effects Of Manganese Chloride On Blood Formation In Rabbits, Donald Wayne Kerr
Electronic Theses and Dissertations
The objectives of these investigations were to determine the effect of manganese on the following: red and white blood cell counts, differential counts, packed cell volume, hemoglobin, reticulocyte composition, and manganese and iron determinations in respect to possible changes in these measurements with prolonged exposure to manganese.
Factors Affecting Efficiency To Weaning In Angus, Charolais, And Reciprocal Cross Cows, Douglas A. Marshall
Factors Affecting Efficiency To Weaning In Angus, Charolais, And Reciprocal Cross Cows, Douglas A. Marshall
Electronic Theses and Dissertations
The purpose of this study was to gain understanding of the variables affecting efficiency of cows and production of their calves to weaning. Specific effects of cow size, condition and milk production on efficiency were examined along with reproductive performance of the experimental females to determine net weaning efficiency. An attempt was also made to examine traits that could be used in practical situations to detect differences in cow efficiency. Considerable research has been conducted to evaluate post weaning efficiency of nutrient utilization, but due to expense and time requirements individual feeding of cows and their progeny has been limited. …
Biologic Properties Of Midwestern Isolates Of Pseudorabies, Pamela F. Leslie
Biologic Properties Of Midwestern Isolates Of Pseudorabies, Pamela F. Leslie
Electronic Theses and Dissertations
Previously, pseudorabies was not considered to be a problem in the midwest but prevalence of the disease has increased over the last five years. In 1974 along, eight isolations of pseudorabies virus were made at the South Dakota Animal Disease Research and Diagnostic Laboratory from outbreaks in the area of northwest Iowa, Nebraska, and South Dakota. As of February1, 1975, here isolations of pseudorabies virus have been made from outbreaks in the area. Iowa State Diagnostic Laboratory reported a six-fold increase in pseudorabies cases in 197 as compared to the preceding four years (5). A survey of swine in Indiana …
Metabolic Studies Of 2, 2', ³⁶4, ³⁶4', 5, 5'-Hexachlorobiphenyl In Guinea Pigs, Margaret Ann Pearson
Metabolic Studies Of 2, 2', ³⁶4, ³⁶4', 5, 5'-Hexachlorobiphenyl In Guinea Pigs, Margaret Ann Pearson
Electronic Theses and Dissertations
This study was carried out to investigate the metabolism 2, 21, 4, 41, 5, 51 – Hexachlorobiphenyl (C16-PCB). This isomer is a major containing more than 50% weight-to-weight (w/w) chlorine.1 To investigate this isomer, we obtained it in 36C1 labeled and non-labeled forms. We developed procedures to isolate and purify both forms of the hexachlorobiphenyl for further study. The 36C1 labeled biphenyl was then introduced into test animals for metabolic studies.
Salmonella Detection By Coulter Counter Volume Displacement Using Specific Antibody Coated Latex, Gita Chandulal Parikh
Salmonella Detection By Coulter Counter Volume Displacement Using Specific Antibody Coated Latex, Gita Chandulal Parikh
Electronic Theses and Dissertations
The present study was designed to determine whether this Coulter Counter for detection of Salmonella typhimurium cells. The latex particles are coated with a specific antiserum which reacts with the particulate antigen, Salmonella cells. An increase in the volume of latex antibody and Salmonella cells is detected by the Coulter Counter data and a teletype to plot the data shortens the time consumption. This method also has a potential to be completely automated.
Proposed Solid Waste System For Rural Areas Of Brookings County, South Dakota, Arnold A. Putman
Proposed Solid Waste System For Rural Areas Of Brookings County, South Dakota, Arnold A. Putman
Electronic Theses and Dissertations
The State Department of Environmental Protection has stated that its goal is to have all solid waste generated in the State of South Dakota, stored, collected and disposed of in a manner which does not cause environmental degradation, potential health hazards, or nuisances to the citizens of South Dakota or its visitors(1). It is the intent to provide efficient economical solid waste management systems throughout the entire State. In addition to properly managed solid waste disposal sites, it is also desired that efficient, routine collection systems be provided in all communities wherever the population is sufficient to support such a …
Pit Ventilation Systems Performance In A Model Swine Building, Stephen H. Pohl
Pit Ventilation Systems Performance In A Model Swine Building, Stephen H. Pohl
Electronic Theses and Dissertations
The evaluation of pit ventilation systems performance by comparing air flow velocities, air currents, and evacuation times is needed to develop the information needed for proper engineering design. Therefore, a research project employing scale models of five pit ventilation systems and employing the principles of similitude and dimensional analysis and initiated with the following objectives: 1) To determine the influence of manure pit ventilation system geometry on air removal from a swine building and 2) To evaluate the effects of pit ventilation system geometry on swine building ventilation characteristics.
Criteria For Determining Feasibility Of Rural Water Supply Systems In Livestock Production Areas, Lynn L. Peterson
Criteria For Determining Feasibility Of Rural Water Supply Systems In Livestock Production Areas, Lynn L. Peterson
Electronic Theses and Dissertations
Feasibility guidelines for proposed and existing community rural water supply systems have been developed around such parameters as population density, size of group, and ability to repay. However, these guidelines were based on more densely populate areas where water is used primarily for domestic purposes. These guidelines do not necessarily fit situations where population density is low and water availability enters in as a factor of livestock production. It is apparent that guidelines need to be developed for such situations. With this intention, the objectives of this study were established as follows: 1. Determine what criteria are pertinent to the …
Nitrogen Fixation By Selected Native Legumes Of South Dakota, Ronald S. Shave
Nitrogen Fixation By Selected Native Legumes Of South Dakota, Ronald S. Shave
Electronic Theses and Dissertations
The purpose of this study has been to advance knowledge of the nitrogen fixation potential of selected native legumes. With this objective in mind the investigation has been broken down into three segments. 1. Specimens of native legumes were sought on a state wide basis, collected, identified and preserved in a permanent herbarium. 2. Native legumes which showed good nodulation were evaluated for nitrogen fixing potential. 3. The microsymbiont was isolated from the nodules of selected native legumes and cultured.
Computer Simulation Of Western Equine Encephalitis Virus Transmission To Horses In South Dakota By The Culex Tarsalis Mosquito, Richard Frank Schryer
Computer Simulation Of Western Equine Encephalitis Virus Transmission To Horses In South Dakota By The Culex Tarsalis Mosquito, Richard Frank Schryer
Electronic Theses and Dissertations
This research is an attempt to develop a computer simulation model that will be capable of illustrating the effect of various factors on the outcome of a simulated equine encephalitis epidemic. It is intended that through computer simulation techniques, I will become possible to better understand the factors that contribute to or reduce the magnitude gained of an encephalitis epidemic in horses. Subsequently, the knowledge gained by computer simulation could provide the groundwork for the development of a model that will be capable of projecting the likelihood of an epidemic based on mosquito populations and WEE infection rates as they …
The Infiltration Of A Lagoon Effluent For Final Waste Treatment, William B. Sherman
The Infiltration Of A Lagoon Effluent For Final Waste Treatment, William B. Sherman
Electronic Theses and Dissertations
The study and literature herein described was instituted for the purpose of examining the application of the stabilization pond effluent at Madison, South Dakota, to a soil type present in that area. The literature emphasized the importance of investigating the soil and water at each location because of variations witnessed in nearly every land application system that has been studied. With much assistance from officials of Madison, South Dakota, a lysimeter study was performed at the Madison lagoon by passing stabilization pond effluent through local soil,, collecting the resultant water to measure the rate of infiltration and analyzing the resultant …
Supplementation Of Opaque-2 And Normal Corn With Lysine And Tryptophan For Finishing Swine, John G. Volz
Supplementation Of Opaque-2 And Normal Corn With Lysine And Tryptophan For Finishing Swine, John G. Volz
Electronic Theses and Dissertations
The Purpose of the research reported herein was to further investigate the adequacy of normal and opaque-2 corn as sources of lysine and tryptophan for finishing swine. The criteria used to measure the value of these two amino acids were growth performance, plasma-free amino acids and carcass data.
Encephalitis Epidemiology In South Dakota : The Development And Use Of An Encephalitis Simulation Model And A Computerized Human Serum Bank To Determine Western And St. Louis Encephalitis Activity, Curtis Dean Wilson
Electronic Theses and Dissertations
The investigation reported here represents an attempt to relate a virus vector simulation model with field observations made in South Dakota over the past years. The viruses that will be examined are two encephalitis viruses, western equine encephalitis (WEE) and St. Louis encephalitis (SLE). Since the encephalitis viruses are grouped within the arboviruses, viruses transmitted by an arthropod vector, any epidemiological study of the human and horse encephalitis outbreak process must include a study of the vector, in this case mosquitoes, and the factors affecting that vector. It is this complex relationship of virus, vector and hosts that led those …
Amino Acid Additions To A Low Protein Corn-Soy Diet For Egg Production, Ali Baghaye Kashani
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.
Induction Of Parturition In The Ovine, Ernest L. Harman
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 …