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Heat And Moisture Production In A Closed Environment Beef Building During Warm Weather, Martin L. Hellickson Apr 1972

Heat And Moisture Production In A Closed Environment Beef Building During Warm Weather, Martin L. Hellickson

Electronic Theses and Dissertations

The need for improved production facilities is emphasized by the fact that beef consumption is at record levels in the United States with continued growth predicted. The annual per capita consumption of beef and veal in the United States was nearly 73 pounds in 1949 and increased 56 per cent to approximately 114 pounds per person by 1969. The demand for beef is also increasing in developed areas throughout the rest of the world. Increases in demands for beef have stimulated the beef industry to make significant gains in production. The production of beef in the United States has increased …

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Production Of Staphylococcal Enterotoxin B In Foods With Varied Environmental Conditions, Robert Jefferey Heidelbauer Apr 1972

Production Of Staphylococcal Enterotoxin B In Foods With Varied Environmental Conditions, Robert Jefferey Heidelbauer

Electronic Theses and Dissertations

The number one cause of food poisoning is enterotoxin produced by certain strains of Staphylococcus aureus. Knowledge of the conditions which inhibit enterotoxin production in foods is of great economic importance. Previous research on staphylococcal food poisoning has been concerned with the presence and growth of Staphylococcus aureus in foods. Until recently, little work has been done with detection of the toxin in foods, even though proof of responsibility for the poisoning depends on direct demonstration of enterotoxin in the food. Before research on enterotoxin production could be feasible a rapid method of detection was needed. Early detection techniques involved …

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A Follow-Up Study Of Adult Home-Economics-Related Occupational Courses Conducted In South Dakota, 1968-1969, Sandra Jenter Hanson Apr 1972

A Follow-Up Study Of Adult Home-Economics-Related Occupational Courses Conducted In South Dakota, 1968-1969, Sandra Jenter Hanson

Electronic Theses and Dissertations

The objective of this study was to investigate the adult home economics related occupational courses conducted in South Dakota during the 1968-1969 school term. At the time this study was initiated, there were no specific criteria for adult occupational classes in vocational education for South Dakota. Classes were offered for persons who had already entered the labor market and who needed training or retraining to achieve stability or advancement in employment. Class enrollment, length of time for the course, and/or charge per hour depended on the objectives of the class and the type of class offered. Classes could have been …

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Properties Of Six South Dakota Bovine Picornaviruses, Janet Marie Mattson Apr 1972

Properties Of Six South Dakota Bovine Picornaviruses, Janet Marie Mattson

Electronic Theses and Dissertations

Since the first enterovirus isolates in 1957 and rhinovirus isolation in 1962, more than 600 isolations of bovine picornaviruses have been reported. Previous workers have been concerned primarily with serological comparisons among their own isolates. Only two viruses, LCR4 and BEV I, are available to investigators for serologic comparison. Picornaviruses have been isolated from animals with. respiratory diseases, diarrhea, and histories of abortions. Interest has not been that great because of the vast number of strains isolated, and at present, the studied strains have no disease attributed to them. Little has been done with these strains of virus except to …

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A Study Of The System Treating Potato Processing Wastes At Fairfield Products Inc., Clark, South Dakota, Terry L. Hagin Apr 1972

A Study Of The System Treating Potato Processing Wastes At Fairfield Products Inc., Clark, South Dakota, Terry L. Hagin

Electronic Theses and Dissertations

During the 1970-1971 and the 1971-1972 processing seasons, Fairfield Products Inc. experienced serious waste disposal problems. Data obtained in June of 1971, shortly after the processing season ended, indicated that the 5-day Biochemical Oxygen Demand (BOD) of the Contents of the stabilization pond was 1180 mg/l. Numerous complaints from the citizens of Clark concerning the odor problem that had developed because of the overloaded treatment system were received by Fairfield Products Inc. as well as the State Department of Health. Acting upon these complaints, the State Health Department ordered Fairfield Products Inc. to retain a consulting engineer to design adequate …

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Comparison Of South Dakota State University Graduates Of The Home Economics And Of Other Curricula With Respect To Family Living Variables, Janice Hofer Grimm Mar 1972

Comparison Of South Dakota State University Graduates Of The Home Economics And Of Other Curricula With Respect To Family Living Variables, Janice Hofer Grimm

Electronic Theses and Dissertations

Marriage and the family as we have known them in the past are currently undergoing greater change at a more accelerated rate than ever before in history. Many writers concerned with the family and social problems would lead us to wonder if marriage is disappearing. There is an increase in communal living, exchange of marriage partners, and "open" campus dormitories. The divorce rate has been climbing steadily for a number of years. But when one looks more deeply into communal life for example, it is discovered that the duration of communal living is generally about two years. A study done …

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Estimation Of Plant S And Zn Concentration By Soil Test Correlation, Douglas Darrel Koth Mar 1972

Estimation Of Plant S And Zn Concentration By Soil Test Correlation, Douglas Darrel Koth

Electronic Theses and Dissertations

Sulfur and Zn are two elements essential for plant growth. Deficiencies of these two plant nutrients occur commonly in many areas of the world. Zinc deficiency symptoms were noted in corn in South Dakota during the late nineteen fifties. In the summer of 1970, S deficiency symptoms appeared in corn (Zea mays L.) grown on sandy soils in Marshall County, South Dakota. Zinc deficiencies of corn occur more often when corn is grown on soils that are characterized by one or more of the following properties: sandy texture, low organic matter, severe past erosion, leveled for irrigation, high lime level, …

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Physiological, Anthropometrical, And Self Concept Changes In Overweight College Women As Affected By Exercise And Voluntary Diet, Connie J. Edlund Mar 1972

Physiological, Anthropometrical, And Self Concept Changes In Overweight College Women As Affected By Exercise And Voluntary Diet, Connie J. Edlund

Electronic Theses and Dissertations

The purpose of this study was twofold: to analyze the effects of a combination exercise program and voluntary diet on selected anthropometric and physiological variables of overweight girls at South Dakota State University, and to determine if measurable changes in self-concept were evident. Hypothesis 1. In the selected anthropometric and physiological variables of overweight girls there is a significant. improvement as a result of participation in a voluntary diet and prescribed exercise program. 2. There is no significant measurable change in self concept of overweight girls as a result of participation in a voluntary diet and prescribed exercise program. Limitations …

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Tissue Ammonium Nitrogen In Sheep Tongue, Liver And Kidney Following Death By Ammonia Intoxication, Dale L. Jaquette Mar 1972

Tissue Ammonium Nitrogen In Sheep Tongue, Liver And Kidney Following Death By Ammonia Intoxication, Dale L. Jaquette

Electronic Theses and Dissertations

Urea was introduced as an economical nonprotein nitrogen source for ruminant animals. In the gastrointestinal tract, urea is hydrolyzed in the presence of bacterial urease to ammonia and carbon dioxide. The liberated ammonia is utilized by rumen microorganisms for amino acid synthesis. Ammonia not used by microorganisms diffuses through the gastrointestinal lining and is transported to the liver by blood, where enzymes synthesize urea by combining two moles of ammonia and one mole of carbon dioxide. The nontoxic urea is excreted by the kidney or secreted with saliva and other digestive fluids for recycling. Ammonia intoxication occurs when more ammonia …

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Sulfur And Methionine Supplementation With Urea For Feedlot Cattle, Bryan E. Davidson Mar 1972

Sulfur And Methionine Supplementation With Urea For Feedlot Cattle, Bryan E. Davidson

Electronic Theses and Dissertations

Protein is often a limiting nutrient in animal diets. As ruminant animals have the ability to convert large quantities of nonprotein nitrogen to protein, the cost of protein supplementation can be greatly reduced by substituting cheaper nonprotein nitrogen compounds in protein supplements for certain amounts of preformed protein. This process is mediated through rumen microorganisms and, to date, urea has been the most widely used nonprotein nitrogen compound in ruminant diets. Efficiency of urea utilization may be affected by several factors. Among these are level and source of energy, level and source of protein and percent urea in the total …

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Manganese-Iron Relationships Influencing Certain Blood Parameters And Organogenesis In Pregnant And Fetal Rabbits, Gerald R. Cizadlo Mar 1972

Manganese-Iron Relationships Influencing Certain Blood Parameters And Organogenesis In Pregnant And Fetal Rabbits, Gerald R. Cizadlo

Electronic Theses and Dissertations

The importance of studying manganese involves its essentiality as a nutrient and its antagonism and interrelations with other essential dietary components. Manganese was first shown to be essentia1 for plant growth by McHargue. Weinberg found that bacteria require manganese for growth, for culture longevity, and to synthesize antibiotics, bacteriophage, protective antigens, several enzymes and endospores. No other metal would satisfy this requirement. Underwood stated that manganese was essential to poultry to prevent perosis and nutritional chondrodystrophy. It was necessary in mammals for normal growth and reproductive function. Specific biochemical roles for manganese have been found. Pyruvate carboxylase activity has been …

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Grain Sorghum Canopy Temperature As A Function Of Meteorological Conditions, Charles Gregg Carlson Feb 1972

Grain Sorghum Canopy Temperature As A Function Of Meteorological Conditions, Charles Gregg Carlson

Electronic Theses and Dissertations

About 70% of the water that falls on the Continental United States is utilized, not as most of us would expect, by drainage into our vast rivers and lakes, but by direct evaporation from our soil surface or by transpiration from plants. It is estimated that three thousand billion gallons of water per day are returned to the atmosphere from the soil and plants in the United States. As weather modification and water management become more practical in the Great Plains Region, it is going to be more and more important and necessary for us to be able to predict …

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Chlortetracycline And Sulfamethazine Supplementation For Feedlot Lambs, Floyd Michael Byers Feb 1972

Chlortetracycline And Sulfamethazine Supplementation For Feedlot Lambs, Floyd Michael Byers

Electronic Theses and Dissertations

Antibiotic reed supplements have been extensively used in major livestock producing countries tor more than 15 years. In the United States, more than 1.25 million kg are used annually as diet supplements. The wide acceptance of antibiotics by livestock producers has been based on established benefits such as increased growth rate, improved reed conversion, and reduced mortality and morbidity from clinical and subclinical infections. Expenditures for antibiotics used as feed additives totaled $42 million in 1965 while the total spent for feed additives approached $142 million. It is evident that antibiotics make up a large part of the total reed …

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Extent Of Use Of Learning Packages And Their Acceptance By South Dakota Home Economics Teachers And Pupils, Marlene Bleeker Brands Feb 1972

Extent Of Use Of Learning Packages And Their Acceptance By South Dakota Home Economics Teachers And Pupils, Marlene Bleeker Brands

Electronic Theses and Dissertations

The purpose of this study· was to determine the extent to which home economics teachers in South Dakota were using learning packages. A second purpose was to determine teacher and pupil reaction to package teaching and learning. Of the 200 home economics teachers responding to the· teacher questionnaire, 72 or 36 percent indicated they had used learning packages during the 1970-71 school year. There was no significant difference among teachers with varying years of teacher experience as to whether or not they used packages. CAPSULES were the major source or type of learning package used by home economics teachers in …

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Carboxymethylcellulose As A Carrier For Follicle Stimulating Hormone In The Female Rat And Bovine, C. Leroy Johnson Jan 1972

Carboxymethylcellulose As A Carrier For Follicle Stimulating Hormone In The Female Rat And Bovine, C. Leroy Johnson

Electronic Theses and Dissertations

A series of biological assays were conducted to compare physiological saline (PSS) and carboxymethylcellulose (CMC) as carriers for follicle stimulating hormone (FSH) and to determine the optimum ratio of FSH to CMC. Constant individual dosages of 0.5 mg FSH were injected into a total of 384 immature female rats in four experiments. Treatments included single injections of FSH in PSS, FSH in 1 percent CMC at ratios (mg FSH: ml CMC) OF 1:3, 1:2, 1:1, 2:1, 3:1, 5:1 and FSH in 2 percent CMC at a ratio of 1:1. Parameters of primary and secondary response were ovarian and uterine weight, …

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Effects Of Manganese Chloride On Gravid Gilts And Newborn Pigs, Dale A. Wade Jan 1972

Effects Of Manganese Chloride On Gravid Gilts And Newborn Pigs, Dale A. Wade

Electronic Theses and Dissertations

Excessive dietary manganese in young mammals has depressed hemoglobin levels, red blood cell synthesis and growth in some investigations, while in other research these were increased. Toxic levels, mode of action and specific physiological effects are unknown although manganese, cobalt and iron appear to compete for absorption mechanisms. Manganese functions in enzyme systems and in carbohydrate and lipid metabolism, is present in red cells and plasma and may be incorporated into the hemoglobin molecule. Gravid gilts were utilized in these investigations since piglet anemia is an economic problem and manganese effects in swine have not been fully defined. Gilt rations …

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Amino Acid Supplementation Of Low Protein Layer Diets, Harlal Choudhury Jan 1972

Amino Acid Supplementation Of Low Protein Layer Diets, Harlal Choudhury

Electronic Theses and Dissertations

Experiments were conducted at the South Dakota State University Poultry Research Center to study the effects of amino acid supplementation of low protein diets on performance of laying type hens. Hans, housed in 8-inch cages, were fed at 24 weeks of age typical 16% protein corn-soy diets diluted with glucose to 10.8% protein and supplemented with 0.15% DL-methionine, 0.19% L-lysine and 0.04% DL-tryptophan. After about 20 weeks of depletion, supplements of 0.05 and 0.1% DL-threonine and DL-valine and 0.1% DL-isoleucine alone and in all combinations were fed for a further period of 16 weeks using a factorial design. Individual supplements …

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Tolerance Studies To Wheat Streak Mosaic Virus In Winter And Spring Wheats, Fazal Rahman Jan 1972

Tolerance Studies To Wheat Streak Mosaic Virus In Winter And Spring Wheats, Fazal Rahman

Electronic Theses and Dissertations

Thirty-five winter and fourteen spring wheat varieties were evaluated for their reaction to wheat streak mosaic virus during 1969-1970 and 1970-1971. Plants were mechanically inoculated and the effects of virus were measured, relative to the control plots, in regards to seed yield, protein percentage, plant height, test weight, 1000-seed weight, number of tillers per plant, number of heads per tiller, number of seeds per head, and number of plants in the 2-foot subplot. Varieties were compared visually for their susceptibility to the virus in terms of percentage infection and severity of symptoms. Seed yield, plant height, test weight, 1000-seed weight, …

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Physiological Regulation Of Cyclic Flowering In Flax, Aurora Salazar Hovland Jan 1972

Physiological Regulation Of Cyclic Flowering In Flax, Aurora Salazar Hovland

Electronic Theses and Dissertations

The flowering pattern of flax (Linum usitatissimum, L.) is cyclic in nature with periods of blossoming separated by periods of rest. To study the regulation of flowering cycles, four experiments were conducted. The first two dealt with nutritional aspects of cyclic flowering by imposing environmental stresses which conceivably might regulate flowering pattern nutritionally. The third and fourth experiments dealt with regulation from hormonal systems and included in vitro regulation of bud growth by growth regulators as well as characterization of endogenous hormonal systems by fluorimetry and bioassays. In the first experiment, the effects of light intensity, temperature, nitrogen and defoliation …

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The Effects Of Chlorpropamide In Diets Of Gravid Gilts On Embryo Survival, Fetal Weight And Fetal And Dam Blood Sugar Levels, Duane E. Wachholz Jan 1972

The Effects Of Chlorpropamide In Diets Of Gravid Gilts On Embryo Survival, Fetal Weight And Fetal And Dam Blood Sugar Levels, Duane E. Wachholz

Electronic Theses and Dissertations

Seventy-six primiparous, crossbred gilts averaging approximately 125 to 135 kg were used in a series of two experiments to determine the effects of chlorpropamide upon reproductive and blood criteria. The drug, fed at the rate of 1000 ppm (1816 mg per day) and 3000 ppm (5448 mg per day), was included in a 14% protein basal diet from the day following breeding until gilts were sacrificed after 60 or 95 days of gestation. The 515 fetuses collected from these gilts were used to obtain information about the effects of chlorpropamide on individual weights and blood glucose and fructose levels. Data …

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The Effect Of Range Condition And Season Of Grazing On The Amount And Quality Of The Diet Selected By Grazing Steers, David W. Rodgers Jan 1972

The Effect Of Range Condition And Season Of Grazing On The Amount And Quality Of The Diet Selected By Grazing Steers, David W. Rodgers

Electronic Theses and Dissertations

Adequate knowledge of the nutrition of grazing animals depends on accurate measurement of both intake and nutritional value of the forage being consumed. Cattle grazing native grasslands select their diet from a variety of plants which are continually changing in palatability, digestibility and chemical composition. The result of these changes may be inadequate nutrition for optimum animal production on a sustained basis. As forages mature, overgrazing occurs or with the onset of drought the incidence of inadequate nutrition of range livestock increases. Many workers agree that sampling from the esophageal fistula is the best method of evaluating the nutritional value …

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A Study Of Chemotaxis In Physarum Polycephalum Schw., Linda Sue Donnelly Jan 1972

A Study Of Chemotaxis In Physarum Polycephalum Schw., Linda Sue Donnelly

Electronic Theses and Dissertations

No abstract provided.

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An Application Of Bayesian Decision Theory To The Evaluation Ofa New Ethical O-T-C Drug Product, Robert Alan Freeman Jan 1972

An Application Of Bayesian Decision Theory To The Evaluation Ofa New Ethical O-T-C Drug Product, Robert Alan Freeman

Electronic Theses and Dissertations

No abstract provided.

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An Experimental Study Of Oxygen Uptake By Loring Sediment In Agitated Vessels / By Herng Huei Tseng, Herng Huei Tseng Jan 1972

An Experimental Study Of Oxygen Uptake By Loring Sediment In Agitated Vessels / By Herng Huei Tseng, Herng Huei Tseng

Electronic Theses and Dissertations

No abstract provided.

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Arrangements For Care Of Preschool Children Whose Parents Live In The Married Student Housing Area At The University Of Mississippi, Nancy Schomberg Abney Jan 1972

Arrangements For Care Of Preschool Children Whose Parents Live In The Married Student Housing Area At The University Of Mississippi, Nancy Schomberg Abney

Electronic Theses and Dissertations

No abstract provided.

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Sephadex G-25 And Charcoal Separation Of Mouse Growth Inhibitors In Soybeans From Trypsin Inhibitors, Larry James Tidemann Jan 1972

Sephadex G-25 And Charcoal Separation Of Mouse Growth Inhibitors In Soybeans From Trypsin Inhibitors, Larry James Tidemann

Electronic Theses and Dissertations

Rising costs have changes man’s ideals and eating habits. Plant ingredients, because of their relatively low costs, have been increasingly used as a substitute for animal proteins. If these plant ingredients could be directly utilized by man, this would be a more efficient use of energy and nutrients. One plant source currently used in such a manner is soybeans, which is a prime source of protein for human and livestock nutrition. However, soybeans contain several factors that are detrimental to man and livestock. Heating of soybeans counteracts these factors, since the undesirable factors are heat labile. However, heat alters the …

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The Effect Of Level Of Dietary Protein On The Growth And Carcass Characteristics Of Growing-Finishing Swine Fed To A Heavy Weight, Keith E. Gilster Jan 1972

The Effect Of Level Of Dietary Protein On The Growth And Carcass Characteristics Of Growing-Finishing Swine Fed To A Heavy Weight, Keith E. Gilster

Electronic Theses and Dissertations

Two hundred sixteen crossbred barrows and 96 crossbred gilts were used in a series of three experiments to determine the effect of dietary protein level during three different growth periods on growth am quantitative and qualitative carcass traits of the growing-finishing pig. Pigs were fed from approximately 20 to 113 kilograms. Corn-soybean meal diets fortified with recommended levels of vitamins, minerals and an antibiotic were fed. Pigs fed 20, 18 or 16% protein diets from weights of 20 to 45 kg gained both significantly faster and more efficiently than pigs fed diets of 12% protein. Feeding a low (12%) protein …

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Responses Of Rumen Microflora To Whey Products Added To High-Grain Low-Roughage Rations, Virgil L. Metzger Jan 1971

Responses Of Rumen Microflora To Whey Products Added To High-Grain Low-Roughage Rations, Virgil L. Metzger

Electronic Theses and Dissertations

Many factors present in livestock feeds affect the numbers and types of protozoa and bacteria in the rumen. A small particle size of feed and a fast rate of passage of the feed through the ruminant decreases protozoal numbers. Full feeding of a concentrate ration and an acid pH in the rumen also tend to reduce protozoa numbers. Bacteria numbers tend to increase as the protozoa numbers decrease. Knowledge of rumen microflora population changes on different rations is lacking. It is known that restricted-roughage rations will generally cause lower protozoal numbers. Since whey is an available source of lactose and …

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The Lipid Composition Of Milk As Affected By High Grain-Limited Roughage Rations Containing Whey Products, Roger Charles Peper Jan 1971

The Lipid Composition Of Milk As Affected By High Grain-Limited Roughage Rations Containing Whey Products, Roger Charles Peper

Electronic Theses and Dissertations

Certain rations fed to lactating dairy cows appear to have a dramatic influence on the lipid composition of milk fat produced. A high grain ration fed with a limited amount of roughage tends to cause a depression in milk fat production while at the same time changing the milk fat composition. There have been various attempts to alleviate the depression in milk fat. Minerals used in the ration seem to slightly relieve the milk fat depression caused by high grain rations. One drawback has been lower milk production due to a decline in concentrate consumption. Whey products added to a …

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Rapeseed, Sunflower And Soybean Meals As Protein Supplements In Dairy Calf Starters, Paul E. Stake Jan 1971

Rapeseed, Sunflower And Soybean Meals As Protein Supplements In Dairy Calf Starters, Paul E. Stake

Electronic Theses and Dissertations

The world need for protein is ever-increasing causing the feed industry to seek new sources of protein supplementation for livestock (17). Urea and other non-protein-nitrogen (NPN) source have received much attention in the past twenty years as protein substitutes, but their use is limited to years as protein substitutes, but their use is limited to functional ruminant animals. Pre-ruminant calves, unable to utilize NPN, need natural protein in their diets. Soybean meal (SBN) has been the common protein supplement in many dry calf meals in the Midwest for several years and has been proven to be an acceptable source of …

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