Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 30 of 80
Full-Text Articles in Entire DC Network
Abscisic Acid And Tissue Desiccation Alters Ribonuclease I Activity In Winter Barley Without Cold Acclimation, James Valentine Anderson
Abscisic Acid And Tissue Desiccation Alters Ribonuclease I Activity In Winter Barley Without Cold Acclimation, James Valentine Anderson
Electronic Theses and Dissertations
This research was initiated to obtain additional information about the causes for phenotypic variation of RNase I activity within winter barley cultivars. Unpublished data from this laboratory shows that antibody produced from RNase I obtained from two cultivars was mutually cross-reactive with antigen from the two cultivars of winter barley. The difference seen in RNase I activity between cultivars which can not be explained by the amount of RNase present may have similarities to that of inactive or incomplete forms of certain enzymes found in sec B mutants. Ferra-Novick et al. reported such sec B mutants as having early inactive …
Sump Pump Survey And Loading Analysis Of Sewers In The East Acres Subdivision Of The City Of Brookings, South Dakota, Ronald Gene Abraham
Sump Pump Survey And Loading Analysis Of Sewers In The East Acres Subdivision Of The City Of Brookings, South Dakota, Ronald Gene Abraham
Electronic Theses and Dissertations
The City of Brookings, South Dakota is a community with a population of over 15,000, including a campus enrollment at South Dakota State University of nearly 7,000. Brookings is located near the Big Sioux River which flows northwest to the southeast and runs only a couple of miles to the west of town. This community has many low areas which are influenced by the high ground water table of the Big Sioux aquifer. The portions of Brookings between 17th Avenue and 22nd Avenue, 6th Street and Derdall Drive is such an area. Many homes within this vicinity …
Impact Of Ponderosa Pine Thinning And Slash Management On The Herbage Production Of Selected Soils In Custer State Park, Kelly John Bopray
Impact Of Ponderosa Pine Thinning And Slash Management On The Herbage Production Of Selected Soils In Custer State Park, Kelly John Bopray
Electronic Theses and Dissertations
Custer State Park's multiple-use management plan stresses compromise among resource users. The objective of integration of forest, wildlife and recreational resource management is to provide maximum benefits to all sectors of the management plan. Forest management techniques have a marked influence on the unique wildlife populations of Custer State Park. To provide input for individuals making integrated management decisions, an approach was taken to combine forest stand and soil survey information, to assess understory herbage production for deer and elk grazing. Thinning pine stands will increase forage and browse production. Slash left from thinning and timber harvesting operations is suspected …
Soil Degradation Comparisons Of Corn Rootworm Insecticides In The Field And Laboratory, Michael J. Haas
Soil Degradation Comparisons Of Corn Rootworm Insecticides In The Field And Laboratory, Michael J. Haas
Electronic Theses and Dissertations
The ability of a pesticide to provide the desired level of control may be lost or diminished after repeated soil applications with the same chemical. The microbial population of the soil may develop the capacity to rapidly degrade a-compound to which it has been repeatedly exposed. This loss of persistence due to rapid degradation of a compound by an adapted microbial population is known as enhanced microbial degradation, or enhanced biodegradation. In 1949 Audus showed that failure of 2,4-D to control weeds in soil receiving prior applications was due to a microbiological factor which rapidly degraded the compound. The loss …
Factors Affecting The Use Of Herbicides In Conservation Tillage, Pamela J. Hutchinson
Factors Affecting The Use Of Herbicides In Conservation Tillage, Pamela J. Hutchinson
Electronic Theses and Dissertations
An alternative method of powering and guiding agricultural implements was described and tested. The system utilized a center pivot irrigation gantry as a position reference device for an electrically powered tool-frame. The system induced the tool-frame to follow a reference point on the irrigation gantry, while that point was incremented outward by a ground driven mechanism. The path followed by the tool-frame was that of an Archimedean spiral. A crop was planted and cultivated with the system, while evaluating the path for accuracy within operations, and repeatability between operations comparison of the overall energy efficiency and energy costs was made …
Differentiation Of Pigment Granules And Tyrosinase Analyses In The Hair Follicle Pigment Cells Of Lethal Yellow And Nonagouti Mice, Robert A. Japs
Differentiation Of Pigment Granules And Tyrosinase Analyses In The Hair Follicle Pigment Cells Of Lethal Yellow And Nonagouti Mice, Robert A. Japs
Electronic Theses and Dissertations
The lethal yellow gene (Ay) located on chromosome two of the mouse (Mus musculus) represents the top dominant of the agouti series. It was first described by Cuenot in 1905 as being lethal in the homozygous (Ay/Ay) state. These (Ay/Ay) embryos encounter abnormalities at the morula or blastocyst stage and die early during the sixth day of gestation when the trophectoderm comes in contact with the uterine epithelium at implantation. Other abnormalities of the Ay gene besides the yellow coat color include its association with the stimulation of normal body growth, obesity, a diabetes like syndrome and sterility. In addition …
Water Balance And Economic Analyses Of Reduced Pressure/Conservation Tillage Systems For Irrigated Corn Production, Brian Ketelhut
Water Balance And Economic Analyses Of Reduced Pressure/Conservation Tillage Systems For Irrigated Corn Production, Brian Ketelhut
Electronic Theses and Dissertations
Water balance and economic analyses of a five-year tillage and irrigation study in South Dakota were performed. Three primary tillage, preplant, operations (Plow, Disk and Till-Plant), two secondary tillage, post-emergence, operations (Inter-Row Tillage and a Control), and four sprinklers operating at pressures of 41 to 344 kPa were studied. Surface runoff, soil water storage and evapotranspiration values were 8, -8 and 100% of total water input values during a study period from late June to mid-August. Evapotranspiration values averaged 7.1 mm/day for the study period. Deep percolation loss was calculated to be zero. The Inter-Row Tillage treatment produced less surface …
The Effects Of Gender On Isokinetic Peak Torque And Torque/Time Relationship, Bryan K. Minnich
The Effects Of Gender On Isokinetic Peak Torque And Torque/Time Relationship, Bryan K. Minnich
Electronic Theses and Dissertations
The study was conducted in the spring semester of 1986 at South Dakota State University. Twenty-nine college-age males and 21 college age females, who were recruited from the university Fitness and Lifetime Activities Program, read and signed an informed consent form prior to any participation in testing sessions. Testing sessions were approximately 20 minutes in length. Two familiarization sessions were completed by each subject and any questions were answered. A warm-up stationary bicycle at a work load of 75 watts for five minutes. Following the warm-up the subjects were seated on the Orthotron II bench and stabilized by straps. They …
Custer State Park : An Area Study, Craig L. Morgan
Custer State Park : An Area Study, Craig L. Morgan
Electronic Theses and Dissertations
This thesis is a systematic geographic analysis of Custer State Park. Because Custer State Park has definite geopolitical boundaries. this study is limited to that particular political region in the Black Hills. The systematic study of this area is not limited to one criterion such as location, climate or human occupance. Rather, it incorporates the sum total of all the criteria included in a traditional regional study. Custer State Park is located in the southern portion of the Black Hills of western South Dakota. Described by numerous authors as an "is land of green in a vast sea of grass," …
Influence Of Early Season Temperatures On The Relative Leaf Expansion Rate Of Corn, Jody L. Ohmacht
Influence Of Early Season Temperatures On The Relative Leaf Expansion Rate Of Corn, Jody L. Ohmacht
Electronic Theses and Dissertations
This study was initiated to determine the response of corn seedling growth to environmental conditions with emphasis placed on soil and air temperatures. Three environmental variables are considered most important to plant growth and these are temperature, light, and moisture. Temperature is considered the most important of these three variables. However, plant response to temperature, light, or moisture conditions will be influenced by other environmental factors. Another variable affecting plant growth which should be considered is initial plant size and/or plant stage of development for any given measuring period. A question that arises is do any of these variables have …
Laboratory Evaluation Of The Theory Of Catenary Irrigation Trail Tubes, Abbas Toghiani-Pozveh
Laboratory Evaluation Of The Theory Of Catenary Irrigation Trail Tubes, Abbas Toghiani-Pozveh
Electronic Theses and Dissertations
Water shortage and high energy cost have promoted the concept of a trail tube irrigation system. Trail tubes are perforated polyethylene hoses, which can be used to replace sprinklers on a center pivot irrigation system for water and energy conservation. A theory on the hydraulics of catenary trail tubes was developed by Chu (1986). The purpose of this study was to evaluate the catenary trail tube theory under laboratory conditions. Perforation flow rate, elevation and pressure were measured on three trail tubes in the laboratory. Tube flow rate, velocity head and friction loss along the tube were calculated from measured …
Selected Metaphors In Elie Wiesel, Jane Frances Sundal
Selected Metaphors In Elie Wiesel, Jane Frances Sundal
Electronic Theses and Dissertations
Who is Elie Wiesel? Elie Wiesel, a Jewish writer, is the 1986 winner of the Nobel Peace Prize. He was born on September 30, 1928 in Sighet, Rumania, a small village in the Carpathian Mountains. When he was a young boy, he was a sensitive student who especially enjoyed studying the Talmud and other Jewish religious texts. In 1944 when he was fifteen, his father, a shopkeeper; his mother, an educated woman; his two older sisters, a baby sister and he were deported by cattle car to Auschwitz. The men and women were separated; he never saw his mother and …
Effect Of Residue And Tillage On Hard Red Spring Wheat Cultivars, Elaine M. Hall
Effect Of Residue And Tillage On Hard Red Spring Wheat Cultivars, Elaine M. Hall
Electronic Theses and Dissertations
Notill seeding leaves crop residue on the soil surface which reduces wind and / or soil erosion. The residue modifies the seedbed environment compared to the black soil surface associated with conventional tillage. Seeding into residue has resulted in enhanced, similar, and reduced grain yields of hard red spring wheat (Triticunm aestivum L).
In Vivo And In Vitro Effects Of Hydralazine On Cellular Growth, Differentiation And Chromatin Structure, Allen John Fasbender
In Vivo And In Vitro Effects Of Hydralazine On Cellular Growth, Differentiation And Chromatin Structure, Allen John Fasbender
Electronic Theses and Dissertations
Hydralazine has been used medicinally as an antihypertensive since 1952. Within two years after its introduction to clinical medicine, an unusual set of symptoms was noted in a significant portion of patients. This set of symptoms resembled those symptoms observed in idiopathic systemic lupus erythematosus. The fundamental problem underlying this drug-related systemic lupus erythematosus is autoimmune in nature. Hydralazine produces a characteristic profile of anti-nuclear antibodies that is unique from that present in idiopathic systemic lupus erythematosus. Other drugs such as procainamide and isoniazid have also been associated with drug-related systemic lupus erythematosus. Interestingly, these drugs differ in the antinuclear …
The Determination Of Phosphorus In Fertilizers By Molecular Emission Spectroscopy, Miliand P. Sant
The Determination Of Phosphorus In Fertilizers By Molecular Emission Spectroscopy, Miliand P. Sant
Electronic Theses and Dissertations
The performance of regulatory analysis on commercial products is an important consumer service. The current regulatory method for phosphorus analysis in fertilizers is very time consuming and laborious. Because of the high price of fertilizers it is necessary to compare the indicated level of phosphorus and actual level in fertilizer sample. The analysis of fertilizer samples assures the farmer that he will be receiving a fair value for his money. The ideal method would be one which is accurate, fast, precise and less expensive. Flame emission spectrometry is an elemental method of analysis sensitive to parts per million and parts …
Development Of An In Vivo Model To Determine The Biological Value Of Microbial Protein, Thomas A. Fritz
Development Of An In Vivo Model To Determine The Biological Value Of Microbial Protein, Thomas A. Fritz
Electronic Theses and Dissertations
The ruminant's ability to convert low quality and non-protein nitrogen (NPN) to high quality protein is as important as their ability to utilize cellulosic feeds. This unique characteristic will continue to be exploited in the future with increasing emphasis being placed on noncompetitive feedstuffs. There has been considerable progress in developing alternative energy sources in beef cattle diets. There has not been the same success in replacing dietary high quality preformed proteins with urea or other NPN sources in most production situations. The complexity of the digestive system in ruminants is well recognized by all who work with diet formulation …
Food Habits Of Charadriiform Birds During Peak Migration Through Eastern South Dakota, James Brian Hauge
Food Habits Of Charadriiform Birds During Peak Migration Through Eastern South Dakota, James Brian Hauge
Electronic Theses and Dissertations
The shorebirds, Order Charadriiformes, are very important organisms as they make up a great proportion of the summer biomass in arctic regions. Spring migration routes of many species of shorebirds carry them through eastern South Dakota where· lakeshores and temporary ponds are crucial stopover points. At these stopover points, the birds feed on various organisms which will supply them with the energy needed for completion of migration and for breeding. This is a study of the migratory schedules and feeding ecology of shorebirds migrating through eastern South Dakota during the spring migrations of 1985 and 1986. It is a part …
Effects Of Bull Exposure On Postpartum Interval And Reproductive Performance In Beef Cows, Corinne D. Naasz
Effects Of Bull Exposure On Postpartum Interval And Reproductive Performance In Beef Cows, Corinne D. Naasz
Electronic Theses and Dissertations
The postpartum interval is the period of time from parturition until the first postpartum estrus that is accompanied by ovulation. The postpartum interval of the suckled beef cow ranges from 46 to 168 days. A prolonged postpartum interval in the beef cow is of major economic importance in terms of cow productivity. The achievement of a 365 day calving interval requires a calving to conception interval of 80 to 85 days. Since average calving rates to a given service or insemination are only 50 to 60%, the earlier a cow begins to cycle postpartum, the greater the chance of successful …
Women, Men, And Land, Yuri Yokota
Women, Men, And Land, Yuri Yokota
Electronic Theses and Dissertations
Willa Sylbert Cather was born in December 7, 1873, in Winchester, Virginia, and Pearl Sydenstricker Buck was born in Hillsboro in the adjoining state of West Virginia nearly nineteen years later, on June 26, 1892. When they were sensitive young girls, both of them were exposed to "foreign” cultures, which were quite different from their original Victorian cultures of the East. Willa and her family moved to the Nebraska frontier when Willa was eight years old. In the Nebraska prairies of the late nineteenth century, there were many foreign immigrants who had come to settle: Swedes, Norwegians, Russians, French, Germans …
Chronosequence Of Terrace Soils In Western South Dakota, Stephen George Wangemann
Chronosequence Of Terrace Soils In Western South Dakota, Stephen George Wangemann
Electronic Theses and Dissertations
Soils on the high terraces of the Cheyenne River in Haakon County, South Dakota have long been recognized as important to the agriculture of the area. Data from this study as well as Haakon County Extension Service and Soil Conservation Service knowledge of the area will complement the soil survey in progress and provide a broader base of information for the future management of this important agricultural resource. This study will also help to quantify some of the properties that set the high terrace series apart from the surrounding shale uplands. Similar sets of high terrace systems along other major …
A General Procedure To Calculate Fall Velocity Over The Full Range Of Sediment Sizes, Saher Shukri Khilfeh
A General Procedure To Calculate Fall Velocity Over The Full Range Of Sediment Sizes, Saher Shukri Khilfeh
Electronic Theses and Dissertations
It has long been recognized that the transport of sediment in water conveyance channels, such as rivers, streams and channels, is a serious and somewhat baffling problem. Not only does the transport of sediment affect the water quality and deposition in reservoirs, but it also indicates increased erosion. In addition, the energy given to the movement of sediment is a loss of energy from the water stream itself insofar as its flow rate is concerned. The movement of sediment is a complex prob1em. A number of methods have been deve1oped which compute sediment load. All of these formulae and methods …
Effects Of Body Condition On Reproductive Performance Of Range Beef Cows, Patrick A. Momont
Effects Of Body Condition On Reproductive Performance Of Range Beef Cows, Patrick A. Momont
Electronic Theses and Dissertations
A 3 yr. 22 factorial study was conducted with 133 mature Simmental X Angus cows calving for 81 d beginning in mid-March to determine minimum cow body condition required for adequate reproductive performance of range beef cows. Two levels of early (early December to mid-February) and late (from calving date to early May) winter nutrition were imposed. Nutritional treatments produced total winter (December-May) weight changes ranging from -188 to -5 kg and wide cow body condition differences at calving and breeding. The breeding season lasted 60-70 d beginning June 5 each yr. Visual condition scores (CS 1-9, l=thin), weight to …
Using Drainmod To Estimate Hydraulic Parameters In Slowly Permeable Soils, Dean D. Steele
Using Drainmod To Estimate Hydraulic Parameters In Slowly Permeable Soils, Dean D. Steele
Electronic Theses and Dissertations
Numerical regression analysis of hydraulic conductivities and soil water characteristics was used to fit the water management model DRAINMOD to electrical pressure transducer measurements and model estimates of water table depth for a slowly permeable soil. Regression analysis of soil properties can replace the need for extensive field and laboratory analysis of soil properties used in the model. The method allows the water management model to be applied to drainage and sub irrigation system cost/benefit projections more quickly than when using conventional analytical approaches to input parameter determination. The objectives of the research were to evaluate the use of a …
Chickpeas As A Protein And Energy Supplement For High Producing Dairy Cows, Darryl Lynn Hadsell
Chickpeas As A Protein And Energy Supplement For High Producing Dairy Cows, Darryl Lynn Hadsell
Electronic Theses and Dissertations
Thirty lactating Holstein cows were randomly assigned to one of three diets to evaluate chickpeas as a dietary supplement from wk 4 to 16 postpartum. Diets contained chickpeas at 0, 50, and 100 % of the concentrate dry matter in place of corn and soybean meal. Total mixed diets, fed individually, contained concentrate corn silage and alfalfa hay at 52, 32, and 16 % of the dry matter. Milk yield (34.5, 35.1, 35.7 kg/d) was higher for cows fed 100 % chickpeas than 0 % chickpeas. Fat (3.06, 3.09, 3.28 %) was highest for cows fed 100 % chickpeas. Milk …
The Effects Of Increasing Hamstring Flexibility On Peak Quadriceps Torque In College-Age Females, Mark Loren Amundson
The Effects Of Increasing Hamstring Flexibility On Peak Quadriceps Torque In College-Age Females, Mark Loren Amundson
Electronic Theses and Dissertations
The purpose of this investigation was to determine if increasing hamstring flexibility elicited a significant increase in peak quadriceps torque in college-age females. Fifteen college-age females, mean age 18.93 ± 0.77 years, volunteered as subjects for the study. Each subject was pretested and posttested for hamstring flexibility and peak quadriceps torque (Orthotron II set at 60 degrees per second). All subjects completed an eight week treatment program consisting of 10 repetitions of proprioceptive neuromuscular facilitation stretching for the right hamstring muscles, done three times per week, with the left leg used as a control leg. Hamstring flexibility was measured utilizing …
A Comparison Of Osmotic Adjustment And Activity Of Cell Wall Associated Enzymes During Short-Term Drought In Winter Wheat, Russell William Gesch
A Comparison Of Osmotic Adjustment And Activity Of Cell Wall Associated Enzymes During Short-Term Drought In Winter Wheat, Russell William Gesch
Electronic Theses and Dissertations
A study was conducted in South Dakota to examine the affects of weather on growth and production of agronomic crops. Over a 17-year period of climatic variables were collected on a daily basis and put into weekly means values. It was reported that a frequent cause of loss for winter cereals was in early spring, when the conditions of extreme fluctuations of temperature and the rehydration state of the tissue affected survival. Osmotic adjustment is one metabolically controlled process that is compatible with the timeframe of weather change during this period which might ameliorate the adverse affects of excess free …
Detection And Description Of Sulfonylurea Herbicide Breakdown In Soil, Mark A. Peterson
Detection And Description Of Sulfonylurea Herbicide Breakdown In Soil, Mark A. Peterson
Electronic Theses and Dissertations
Corn (Zea mays L. 'Sakata TS60’), grain sorghum [Sorghum bicolor (L.) Merr. 'Sokota 844'], and flax (Linum usitatissimum L. 'Culbert 79') were tested to determine suitability for petri dish bioassays of chlorsulfuron {2-chloro-N-[[ (4-methoxy-6-methyl-1,3, 5-triazin-2-yl) amino]carbonyl]benzenesulfonamide}, metsulfuron {2-[[[[ (4-methoxy-6-methyl-1,3,5-triazin-2-yl) amino] carbonyl]amino]sulfonyl-]benzoic acid} and chlorimuron {2-[[ (4-chloro-6-methoxypyrimidine-2-yl) amino carbonyl] aminosulfonyl]benzoic acid, ethyl ester}. Sorghum was not an acceptable bioassay species. Corn had a significant response to all three herbicides. Flax was the best indicator species in both soil types tested. The effects of herbicide concentration, temperature, moisture, and pH on decomposition rate of chlorsulfuron and metsulfuron were studied. Both chlorsulfuron and …
A Study Of The Relative Contribution Of Selected Sociocultural And Personality Variables To The Explanation Of Prejudice And Discrimination In South Dakota, Dan Peterson
Electronic Theses and Dissertations
Very little research has been conducted in South Dakota on the subject of prejudice and discrimination. This research not only attempts to address this lack of research, but it also attempts to assess the functions that prejudicial attitudes may serve as well as to provide further insight into the explanatory power of divergent theoretical perspectives (psychological and sociological). In order to fill this gap in regional research, a questionnaire was administered to a sample of college freshman attending one of the state colleges in South Dakota. Results of the survey indicated that those sampled were neither unprejudiced nor highly prejudiced, …
Determining Green Needlegrass (Stipa Viridula Trin.) Seed Germination And Viability, Alan Lee Rubida
Determining Green Needlegrass (Stipa Viridula Trin.) Seed Germination And Viability, Alan Lee Rubida
Electronic Theses and Dissertations
Green needlegrass (Stipa viridula Trin.) is a native, cool season perennial bunchgrass common to the northern Great Plains, Good seedling vigor, rapid recovery after defoliation, high forage yields, nutritive quality, and palatability give green needlegrass potential use in range reclamation. Green needlegrass seed dormancy can cause problems to spring field establishment problems. To alleviate field establishment problems, dormant (fall) plantings have replaced spring plantings. Seed dormancy can be completely overcome in the laboratory by a 12-week viability test (12-week stratification period); however, this is impractical as a normal procedure. Currently, the Association of Official Seed Analysts (AOSA) procedure for determining …
The Metal Promoted Hydration Of Di-2-Pyridyl Ketone And The Crystal And Molecular Structures Of Bis-2,2',N,N'-Bipyridyl Ketone-Hydrate Chromium(Iii) Chloride And Ruthenium(Iii) Chloride, Shaun Owen Sommerer
The Metal Promoted Hydration Of Di-2-Pyridyl Ketone And The Crystal And Molecular Structures Of Bis-2,2',N,N'-Bipyridyl Ketone-Hydrate Chromium(Iii) Chloride And Ruthenium(Iii) Chloride, Shaun Owen Sommerer
Electronic Theses and Dissertations
The metal promoted hydration of Di-2-Pyridyl Ketone (DPK), has been of interest for some time in that it falls into a rare class of ligands that undergo reaction upon coordination to a transition metal ion. Metal promoted hydration here means that the carbonyl linkage of the ketone has undergone hydration to the diol form because the DPK is coordinated to a metal. Fig. 1 illustrates the hydration process. This is of interest because it is well known that ketones do not normally undergo hydration unless they are flanked by very strong electron withdrawing groups such as chloride or fluoride. Special …