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Articles 9961 - 9990 of 10916
Full-Text Articles in Entire DC Network
An Examination Of Triiodothyronine Binding Characteristics In Rat Liver Nuclei With Respect To Age And Hypophysectomy, David Edward Erkenbrack
An Examination Of Triiodothyronine Binding Characteristics In Rat Liver Nuclei With Respect To Age And Hypophysectomy, David Edward Erkenbrack
Electronic Theses and Dissertations
No abstract provided.
Discrimination Against Women In Mississippi Newsrooms : An Exploratory Study, Ouida C. Drinkwater
Discrimination Against Women In Mississippi Newsrooms : An Exploratory Study, Ouida C. Drinkwater
Electronic Theses and Dissertations
No abstract provided.
A Dietary Analysis Of The Choctaw And Chickasaw Indians Of Northeast Mississippi, Camille Margarita Hallman
A Dietary Analysis Of The Choctaw And Chickasaw Indians Of Northeast Mississippi, Camille Margarita Hallman
Electronic Theses and Dissertations
No abstract provided.
The Food And Feeding Habits Of The Common Bay Anchovy, Anchoa Mitchelli (Valenciennes), Zubir Bin Din
The Food And Feeding Habits Of The Common Bay Anchovy, Anchoa Mitchelli (Valenciennes), Zubir Bin Din
Electronic Theses and Dissertations
No abstract provided.
The Kinetics Of 2-Chloroethanol Degradation In Aqueous Media, Masood Ahmad Chowhan
The Kinetics Of 2-Chloroethanol Degradation In Aqueous Media, Masood Ahmad Chowhan
Electronic Theses and Dissertations
No abstract provided.
A Comparison Between Crossbred And Straightbred Production Of Targhee Range Ewes, James M. Pajl
A Comparison Between Crossbred And Straightbred Production Of Targhee Range Ewes, James M. Pajl
Electronic Theses and Dissertations
This investigation was initiated. to determine the effect of crossbred vs. straightbred production under the environmental conditions found at the Antelope Range Research Station, Buffalo, South Dakota.
Western Corn Rootworm Sex Pheromone; Field Trapping Studies, Michael J. Lockwood
Western Corn Rootworm Sex Pheromone; Field Trapping Studies, Michael J. Lockwood
Electronic Theses and Dissertations
The purpose of this study was to explore the potential of monitoring field populations of the NCR and WCR beetles with pheromone baited sticky traps. Predictions of CRW infestations in corn fields on a single field basis have yet to be achieved. The objectives of this study were: 1. To determine the effects of trapping procedures on CRW beetle trap catch variability: trap design, trap height, pheromone age, pheromone concentration and beetle density. 2. To determine the impact of environmental factors on daily trap catch variability: temperature (OC), wind speed (m/sec), and relative humidity (%) taken at hourly intervals. 3. …
Nonsporing Anaerobic Bacteria In Foods, Sylvia M. Huppler
Nonsporing Anaerobic Bacteria In Foods, Sylvia M. Huppler
Electronic Theses and Dissertations
Anaerobic non spore forming bacteria are not detected in routine food examinations, and their occurrences in foods has seldom been reported in the literature. The purpose of this study is to determine the occurrence of non-spore forming anaerobes, the identification of the isolates found, and the possible growth and multiplication in foods which might contribute to spoilage or food illness.
Effects Of Gamma Radiation On The Southern Corn Rootworm, Denise Gayle Hanson
Effects Of Gamma Radiation On The Southern Corn Rootworm, Denise Gayle Hanson
Electronic Theses and Dissertations
Insects continue to be one of the major problems of man. It is, however, becoming more and more difficult to find substances that are effective in controlling insects and that are environmentally safe. It has become apparent that to control or eliminate harmful insects, alternate methods of control must be developed to replace or reduce the use of insecticides. One possible alternate method of control is to use insects against themselves in a process called the sterile male technique. This technique generally uses gamma radiation to induce sterility in males. When they are released into the native population and mate …
A New Procedure For Calculating Dipolar Sources Of Eeg Discharges., Joseph Harvey Rothweiler 1952-
A New Procedure For Calculating Dipolar Sources Of Eeg Discharges., Joseph Harvey Rothweiler 1952-
Electronic Theses and Dissertations
A new procedure has been developed for determining the location of the source of certain EEG discharges given the measured surface potentials. The source is modeled as a single current dipole with arbitrary position and orientation, while the head is modeled either as a single homogeneous sphere or as three concentric spheres. This procedure is developed by extending the matched filter concept of communications theory to functions defined on a spherical surface. In addition, simplifications are developed which reduce the amount of computation required. Simulations have been performed using computer generated data to show the validity of the locating procedure …
The Status Of Science Supervision In Florida School Districts, Roy F. Ellis
The Status Of Science Supervision In Florida School Districts, Roy F. Ellis
Electronic Theses and Dissertations
No abstract provided.
The Effects Of Prescribed Burning On Nutrient Content Of Selected Understory Species In An East Texas Loblolly-Shortleaf Pine Stand, Kelly Bell
Electronic Theses and Dissertations
The objectives of this study were to determine whether prescribed burning affected nutrient levels in leaves and twigs of six species and whether there were differences in response between leaves and twigs. Backfire and headfire treatments were used to determine differences between burning techniques. Samples were collected in October, 1974. The burn was in March, 1975 and post-burn sampling was in June, 1975, September, 1975, and June, 1976. Leaf and twig tissue were analyzed for contents of protein, calcium, potassium, and phosphorus and then subjected to statistical analysis. No difference was found between burning techniques. Protein and phosphorus increased and …
Variables Associated With Breeding Waterfowl On South Dakota Stock Ponds, Jay A. Roberson
Variables Associated With Breeding Waterfowl On South Dakota Stock Ponds, Jay A. Roberson
Electronic Theses and Dissertations
Use of stock watering ponds by indicated breeding pairs of waterfowl was measured in the western two-thirds of South Dakota from 1973 to 1976. Multiple regression and discriminant analyses were used to describe the habitat associated with pairs of each species. Habitat variables explained 35-47 percent of the variation in pairs having small home ranges and 26-35 percent of the variation in pairs having large home ranges. Shoreline distance account for more variation in mallard (Anas Platyrhmchos) and blue-winged teal (A. discors) pairs than any other single variable. Ponds used by these pairs and shoreline distances that averaged 590 m …
Population, Home Range, And Dispersal Of Red Foxes In East-Central South Dakota, James D. Sweeting
Population, Home Range, And Dispersal Of Red Foxes In East-Central South Dakota, James D. Sweeting
Electronic Theses and Dissertations
The population, dispersal movements and summer home range of red foxes (Vulpes vulpes) were studied in east-central South Dakota during 1974 and 1975. The spring population density of foxes on a 23,319 ha study area declined from 9.2 families/township in 1974 to 7.6 families/township in 1975. Fifty-four percent of 130 foxes tagged in spring, 1974 and 1975 were recovered during the first year following tagging. Hunting and trapping accounted for 18.0 and 77.8 percent, respectively. Recoveries revealed that dispersing juvenile male foxes were more mobile than juvenile females; juvenile foxes traveled a mean distance of 39 km for males and …
Model Study Of Swine Manure Pit Ventilation Systems, Gary W. Buller
Model Study Of Swine Manure Pit Ventilation Systems, Gary W. Buller
Electronic Theses and Dissertations
A potential method to attain an optimally controlled swine environment conductive to both the animal and laborer is a pit ventilation system. A pit ventilation system should exhaust noxious gasses and odors that evolve in the pits before natural or forced convection currents transfer the gasses and odors into the livestock environment. This is especially important when minimum airflow rates are employed during winter operation. Pit ventilation systems in swine confinement housing have not continually produced an optimum environment for both the animal and operator. Consequently, improvements in design and performance data on various systems are needed, if more reliable …
Dicamba Use In Relationship To Drift Injury On Soybeans In Southeastern South Dakota, Duane E. Auch
Dicamba Use In Relationship To Drift Injury On Soybeans In Southeastern South Dakota, Duane E. Auch
Electronic Theses and Dissertations
The benefits of using herbicides have been demonstrated repeatedly, but less is known about the risks involved in the use of herbicides. Any herbicide movement out of its field of application increases the potential damage to sensitive plants and animals. Herbicides more through the air by herbicide drift. Spraying equipment, application methods, and spray additives have been developed to reduce the amount of drift. Unfortunately, none have been shown to eliminate drift without reducing herbicide effectiveness. Dicamba (3,6-dichloro-o-anisic acid) has the potential to cause drift injury. Dicamba controls certain broadleaf weeds in corn (Zea mays L.), small grain, and pasture, …
Epiphytic Movement And Survival Of Pseudomonas Syringae On Spring Wheat, Sandra J. Fryda
Epiphytic Movement And Survival Of Pseudomonas Syringae On Spring Wheat, Sandra J. Fryda
Electronic Theses and Dissertations
Field, greenhouse, and growth chamber experiments demonstrated that Pseudomonas syringae, the incitant of bacterial leaf necrosis of wheat, moved from inoculated wheat seed to the seedling and survived as an epiphyte on the leaves. In greenhouse experiments 80-90% relative humidity favored movement of P. Syringae to the coleptile and first true leaf of the seedlings. Movement was not different on wheat cultivars susceptible or resistant to bacterial leaf necrosis. Under 70-98% relative humidity in a growth chamber, P. syringae moved to a significantly higher (P=0.01) percentage of seedlings at 10C than at 16 or 22C. In a field experiment, using …
The Transmission Of Mycobacterium Avium Among Swine: An Immunologic And Bacteriologic Study, Steven R. Ellsworth
The Transmission Of Mycobacterium Avium Among Swine: An Immunologic And Bacteriologic Study, Steven R. Ellsworth
Electronic Theses and Dissertations
Mycobacterium Avium is the major cause of tuberculosis in swine (53). The natural reservoir of this organism is assumed to be birds, particularly poultry. Federal meat inspection records show that efforts to reduce tuberculosis in poultry over the last 55 years have resulted in an accompanying decline of tuberculosis in swine (54). Studies have shown, however, that M. avium infection in swine cannot always be traced to birds, and the disease is common in those regions where tuberculosis in poultry is rare (53). Also serotypes not normally pathogenic for birds are commonly isolated from swine (40, 51, 53). Indeed, many …
Organochlorine Insecticide, Polychlorinated Biphenyl And Metal Residues In Birds Of South Dakota, Brian Gueck
Organochlorine Insecticide, Polychlorinated Biphenyl And Metal Residues In Birds Of South Dakota, Brian Gueck
Electronic Theses and Dissertations
Chlorinated bydrocarbon insecticides, polychlorinated biphenyls (PCB’s) and metal residue levels were measured in tissues of common crows, American coots, starlings and Franklin’s gulls of South Dakota. Methods of analysis for insecticides and PCB’s included column, thin-layer and gas—liquid chromatography and atomic absorption spectrophotometry for metals. DDE was the most prevalent residue, being detected in 93% of all samples ad averaging 66% of the total residues in the carcass.
In Vitro Analysis Of Pre- And Early Postimplantation Development Of Lethal Yellow (Ay/Ay) Mouse Embryos, Linda L. Johnson
In Vitro Analysis Of Pre- And Early Postimplantation Development Of Lethal Yellow (Ay/Ay) Mouse Embryos, Linda L. Johnson
Electronic Theses and Dissertations
The dominant AY gene of the agouti locus (linkage group V) in the house mouse (Muse musculus) is one of approximately eleven alleles specifying coat color. Homozygosity of the AY allele is thought to cause death of the embryo in utero around the time of implantation. For this reason the AY/AY genotype is called the lethal yellow mouse. The precise time that the primary gene defect is first expressed is not known. Attempts to pinpoint the phenocritical period in an effort to discover the basic biochemical alteration specified by the lethal gene have thus far …
The Distribution Of Small Mammals On Samuel H. Ordway Memorial Prairie, Richard D. Puetz
The Distribution Of Small Mammals On Samuel H. Ordway Memorial Prairie, Richard D. Puetz
Electronic Theses and Dissertations
Factors affecting the distribution of small mammals have been investigated for many years. Environmental characteristics which correlated with rodent populations have been found to vary from specie to specie. If Ordway Prairie were homogeneous with regard to habitat, management would be relatively simple. The prairie, however, is heterogeneous in its habitat. Intuitively one could expect that management to increase or decrease a particular species could possibly affect the population levels of other beneficial species. The objectives of this study were to document the presence, relative abundance, and distribution of small mammals on S.H. Ordway Prairie. An additional objective was to …
Value Of Farm Groves To Nesting Songbirds In Sioux County, Iowa, Dennis L. Pluimer
Value Of Farm Groves To Nesting Songbirds In Sioux County, Iowa, Dennis L. Pluimer
Electronic Theses and Dissertations
A two-year study (1974-1975) of birds in Sioux County, Iowa farm groves is reported. Twenty-eight groves were visited and 66 species of birds (34 breeding and 32 migrant) were observed. The number of species sighted per farm varied from 8 to 40. Grackles, starlings, and robins were the most abundant breeding birds and white-throated sparrows, Harris’ sparrows, and Myrtle warblers were the most abundant migrants. Number of species of birds per section did not depend upon the number of farms in that section. The mean number of sightings in a two farm section was 395, while the mean number of …
Solvent Extraction Of Chromium By Salicylic, Thiosalicylic, And Phthalic Acids, Dennis G. Sebastian
Solvent Extraction Of Chromium By Salicylic, Thiosalicylic, And Phthalic Acids, Dennis G. Sebastian
Electronic Theses and Dissertations
The use of salicylic, thiosalicycle, and phthalic acids as chelating agents for the extraction of Cr(III) from aqueous solution was investigated. Normal butanol was selected as a solvent due to its relatively low solubility in the aqueous phase. Heating of the metal-ligand mixture was necessary to accelerate complex formation. The efficiency of the extraction process was found to be dependent upon pH, heating duration, and the choice of buffer systems. The % extraction was reduced using some buffer systems due to the formation of non-extractable complexes with chromium. A potassium hydrogen phthalate buffer system was found to yield the highest …
Extent And Type Of Retirement Preparation Made By Middle-Aged Women In South Dakota, Mary M. Wipf
Extent And Type Of Retirement Preparation Made By Middle-Aged Women In South Dakota, Mary M. Wipf
Electronic Theses and Dissertations
One purpose of this study was to examine the extent and type of preparation for retirement made by middle-age people, specifically women from 0 through 64 years of age, in South Dakota. These preparations were examined in terms of the several adjustments demands with which retired people are faced in American society. A further purpose of the study was to compare the age, level of education, and marital status of the subjects to their responses to questions dealing with the various aspects of preparation for retirement.
Studies Of The Establishment And Characterization Of Lactobacilli In The Digestive Tract Of Chickens, David Linn Voelker
Studies Of The Establishment And Characterization Of Lactobacilli In The Digestive Tract Of Chickens, David Linn Voelker
Electronic Theses and Dissertations
One objective of this study was to determine if the inoculation of young chicks with crop-adhering strains of lactobacilli affects the numbers of lactobacilli, fecal coliforms, and fecal streptococci in the intestinal tract. Only one known study has been conducted to identify the lactobacilli which adhere to crop cells. In this study 86% of the crop lactobacilli could not be identified as any known species. On the other hand, in a study of the types of lactobacilli present in the intestinal tract, nearly all could be classified as known species, with most identified as Lactobacillus acidophilus. These defined differences between …
A Study Of Selected Factors Associated With Formal Normative Inmate Behavior At The Maryland State Correctional Institution, Virgil J. Brown
A Study Of Selected Factors Associated With Formal Normative Inmate Behavior At The Maryland State Correctional Institution, Virgil J. Brown
Electronic Theses and Dissertations
This research was designed to answer the following question: “What factors are associated with inmate deviations from formal rules and regulations within a correctional institution?” The study had the following objectives: (1) the development of a theoretical model which would be capable of analyzing formal normative behavioral patterns of incarcerated individuals; (2) the development of instruments for measuring formal normative behavior and a set of related variables; (3) to establish the degree of association between selected variables and formal normative behavior of inmates; and (4) the development of an index for prediction of inmates propensity to conform to or deviate …
Estimate Of Production By A Population Of Fathead Minnows, Pimpephales Promelas, In A South Dakota Prairie Wetland, Ronald D. Payer
Estimate Of Production By A Population Of Fathead Minnows, Pimpephales Promelas, In A South Dakota Prairie Wetland, Ronald D. Payer
Electronic Theses and Dissertations
Estimates of production and population densities were obtained for an autochthonous population of fathead minnows, Pimephales promelas Rafinesque, in a South Dakota prairie wetland. The study was conducted from May to September of 1976. Population estimates were obtained using a Schnabel-type mark and recapture model. Fish were marked either by fin clipping or granular fluorescent pigments driven into the dermal tissue. Production estimates were derived both arithmetically and graphically. The estimated population of adult fathead minnows declined from 194 in May and June to 26 in July. Production by adults was estimated at 0.10 kg, or 0.0007 gm/m²/yr. The population …
Digestibility Of Common Forage Plants And Energetic Requirements Of The Black-Tailed Prairie Dog, Maureen A. Beckstead
Digestibility Of Common Forage Plants And Energetic Requirements Of The Black-Tailed Prairie Dog, Maureen A. Beckstead
Electronic Theses and Dissertations
Black-tailed prairie dogs (Cynomys ludovicianus) assimilated 51.5 percent of the wheatgrass (Agropyron intermedium) they consumed; thus, they would have to consume 0.148 kcal · g-1 · day-l in order to obtain the 0.076 kcal · g-1 · day-1 they would require to maintain their weight. Prairie dogs assimilated 31.5 percent of the buffalograss/blue grama mixture (Buchloe dactyloides/Bouteloua gracilis) they were fed. They would have to consume 0.229 kcal · g-1 · day-1 of this forage to assimilate 0.072 kcal · g-1 · day-1 and maintain their weight. The proximate composition of forages fed in feeding trials was similar to that …
Wildlife Habitat Evaluation Of The Unchannelized Missouri River In South Dakota, James R. Clapp
Wildlife Habitat Evaluation Of The Unchannelized Missouri River In South Dakota, James R. Clapp
Electronic Theses and Dissertations
Areas of eight habitats were identified, delineated, and measured along the unchannelized Missouri River in South Dakota. Agricultural and urban developments existed on 60 percent of the land within 1 km of the river. Six habitat types made up the non-developed land in the study area: cottonwood-dogwood (16 percent), cottonwood-willow (9 percent), elm-oak (7 percent), cattail marsh (3 percent), sand dune (3 percent), and sand bar (1 percent). All non-developed habitats except sand bar were sampled to obtain vegetative composition and to determine their value to wildlife. The value of each habitat to nine faunal groups of wildlife was subjectively …
Biology Of The Porcupine (Erethizon Dorsatum) In Northwestern South Dakota, Judith Johnson
Biology Of The Porcupine (Erethizon Dorsatum) In Northwestern South Dakota, Judith Johnson
Electronic Theses and Dissertations
The summer home ranges, food habits, cover preferences, population dynamics, metabolic rates, growth rates, and taxonomic characteristics were determined for porcupines (Erethizon dorsatum) in northwestern South Dakota. The summer home ranges were 158.2 ha for adult females, 90.4 ha for juveniles, and 57.9 ha for adult males. The population was 34 percent adult males, 16 percent juvenile males, 34 percent adult females, and 15 percent juvenile females. The preferred daytime cover choice was silver buffaloberry (Shepherdia argentea), followed by snowberry (Symphoricarpos occidentalis), earth dens, forbs, and low brush. Shrubs were the most important item in the diet, then trees, forbs, …