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Articles 6901 - 6930 of 8975
Full-Text Articles in Entire DC Network
Comparison Of Immunologic Responses Between Mice Differing At The Agouti Locus : Immunologic Abnormalities In Lethal Yellow (Ay) Mice Are Augmented By Obesity, Nancee L. Oien
Electronic Theses and Dissertations
The agouti locus, located on chromosome 2 of the house mouse (mus musclus), functions in the complex regulation of pigment synthesis. The complexity of its regulatory role is revealed through the aberrations that become manifest when a mutation, specifically the lethal yellow (AY) mutation, occurs at the agouti locus. The lethal yellow mutation is associated with an alteration in pigment synthesis, onset of obesity at approximately 120 days, and an increased susceptibility to cancer. Based on the putative relationship between cancer and immunity, this mutation may be correlated with altered immune mechanisms. This correlation was investigated by comparing a delayed-type …
Zone And Drip Cooling Comparisons For Lactating Swine, Dan L. Raap
Zone And Drip Cooling Comparisons For Lactating Swine, Dan L. Raap
Electronic Theses and Dissertations
A comparison of drip cooling, zone cooling, and conventional ventilation was performed on lactating swine. Overall, the cooling systems did not significantly improve swine performance. The drip and zone systems highly significantly lowered sow respiration rates by 40 and 28 percent, respectively, when compared to the respiration rates of sows from a conventionally ventilated room. Older sows consumed ten percent more feed than younger sows. Older sows returned to estrus after weaning approximately two days sooner than younger sows. Based on swine performance of this two-year study, neither drip cooling or zone cooling systems should be installed in areas with …
Comparison Of An Enzyme-Linked Immunosorbent Assay, An Indirect Fluorescent Antibody Test And A Direct Agglutination Test For Detecting Ovine Fetal Antibodies To Toxoplasma Gondii, Sheryl Lynn Seefeldt
Comparison Of An Enzyme-Linked Immunosorbent Assay, An Indirect Fluorescent Antibody Test And A Direct Agglutination Test For Detecting Ovine Fetal Antibodies To Toxoplasma Gondii, Sheryl Lynn Seefeldt
Electronic Theses and Dissertations
Toxoplasma gondii is a coccidian parasite which produces a disseminated infection and reproductive failure in sheep. It is a major cause of abortion in sheep in New Zealand, Australia, and England. Within the last 5 years, T. gondii has been reported to cause ovine abortion in the United States. Individual flocks in New Zealand may lose 15-20 percent and sometimes as high as 50 percent of the lamb crop as a result of T. gondii induced abortion. The prevalence of T. gondii and the economic impact of the disease in U.S. sheep flocks is unknown. Several approaches have been employed …
Availability Of Elemental Selenium To Plants, Shu-Chen Tseng
Availability Of Elemental Selenium To Plants, Shu-Chen Tseng
Electronic Theses and Dissertations
Selenium has been found to be both essential for and toxic to animals and humans. Plants make up the main source of selenium for animals which are the food source for humans. Therefore, the selenium content in soils and plants is of interest. The uptake and accumulation of selenium by plants is governed by many environmental factors such as plant species, soil pH, soil type, the chemical form of the selenium and the presence of other ions. The most important factors regulating selenium uptake by plants are the concentration and the form of selenium present in the soil. Many authors …
The Coteau Du Missouri : A Regional Study, Robert A. Speck
The Coteau Du Missouri : A Regional Study, Robert A. Speck
Electronic Theses and Dissertations
The purpose of this study is to provide a general data base for future studies of and planning for studies of the region. It will also provide the people of South Dakota with information needed to derive a better understanding of the geography of South Dakota. The Department of Geography at South Dakota State University has adopted as a major goal of its graduate program the completion of a series of master’s theses on the geography of South Dakota. Each of these theses will examine the geography of one of the thirteen physiographic divisions that exist within the state. By …
Aroyl Phosphates : Evidence For The High Reactivity Of Acyl Phosphates, Abdihakim O. Ahmed
Aroyl Phosphates : Evidence For The High Reactivity Of Acyl Phosphates, Abdihakim O. Ahmed
Electronic Theses and Dissertations
Organophosphorus compounds are one of the most important classes of chemical compounds found in plant and animal systems. Organophosphorus compounds are also important industrial chemicals used in building materials and in pesticides. Two typical organophosphorus pesticides are diazionan and malathion. In biological systems organophosphorus compounds are active constituents found in cell membranes and they are important mediators of energy transfer and storage processes. Energy liberated during biochemical processes is stored in the form of an organophosphate, adenosine triphosphate(ATP). The stored energy can be made available to the cell for its biochemical reactions that require energy input. During the course of …
No Time For Tears : A Look At Death In The Salinas Valley Novels Of John Steinbeck, Bill Anderson
No Time For Tears : A Look At Death In The Salinas Valley Novels Of John Steinbeck, Bill Anderson
Electronic Theses and Dissertations
Robert F. Weir, in Death in Literature, begins his study by writing about "a Buddhist parable which nicely illustrates the inevitability of death and the perennial problem of accepting death as a fact of human existence". A Buddhist woman, distraught over the death of her child, seeks help from Buddha, who instructs her to collect mustard seeds from any house where death has not occurred. Full of hope because she thinks she will find such a house, she embarks on her task only to learn that death strikes every family; finally she accepts the death of her son. Weir then …
The Effect Of "Al Manaahil" On Spelling And Reading Of Students In Third Grade, Muntaha Issa Haddad
The Effect Of "Al Manaahil" On Spelling And Reading Of Students In Third Grade, Muntaha Issa Haddad
Electronic Theses and Dissertations
Jordan TV was officially inaugurated by His Majesty King Hussein on 27 April 1968. The corporation's programs are varied, supplying news, information, entertainment, and education. Jordan's satellite earth station was inaugurated on 29 May 1972. In April 1974 Jordan Television (JTV) introduced color for the first time. With the increased viewing over the past fifteen years, there has been a remarkable increase in transmission power throughout the country. In 1980 came the introduction of Electronic News Gathering (ENG) equipment which is used to cover all local news as well as major international conferences. Since 1968 Jordan Television has begun transmitting …
Reproductive Performance Of Anestrous Crossbred Ewes Subjected To Artificial Photoperiod Or Melatonin, Kelly Ann Weiskircher
Reproductive Performance Of Anestrous Crossbred Ewes Subjected To Artificial Photoperiod Or Melatonin, Kelly Ann Weiskircher
Electronic Theses and Dissertations
Sheep are seasonal breeders exhibiting estrus in the fall with the decreasing daylength. This characteristic limits the reproductive performance of the ewe. With the decreasing daylength, melatonin is produced by the pineal gland. This hormone is thought to trigger the onset of estral activity. The study herein attempted to alter this seasonal fertility pattern by subjecting ewes to artificial photoperiod and through the oral administration of melatonin and a melatonin ear implant. The lambs in this experiment were born during late fall which is more favorable than the normal lambing season for the survival rate and growth performance of the …
Production Of Triploid Rainbow Trout For Evaluation In South Dakota Waters, Jeff C. Dillon
Production Of Triploid Rainbow Trout For Evaluation In South Dakota Waters, Jeff C. Dillon
Electronic Theses and Dissertations
In September 1986, approximately 50,000 rainbow trout (Salmo gairdneri) eggs were fertilized and subjected to heat shocks to prevent expulsion of the second polar body, theoretically resulting in triploid embryos. Heat shocks were at 26 and 28°c, began 10, 20, 30, or 40 min after fertilization, and lasted for 10 or 20 min for a total of 16 treatments. Another 25,000 eggs served as controls and were handled identically but at a normal water temperature of 12°c. Cumulative hatching rates for eggs that were heat-shocked at 26 and 28° were 64 and 50%, respectively, compared to control eggs which had …
Control Of Downy Brome With Combinations Of Bay-Smy-1500 And Metribuzin, James R. Smart
Control Of Downy Brome With Combinations Of Bay-Smy-1500 And Metribuzin, James R. Smart
Electronic Theses and Dissertations
Downy brome (Bromus tectorum L.) is a severe weed problem in winter wheat (Triticum aestivum L.) throughout North America. Downy brome competes for space, light, nutrients in the soil, and most importantly moisture. Rydrych reported that a grower with reasonable control of downy brome can increase yield of winter wheat 6-12 bushels per acre. The lack of selective herbicides which control downy brome in winter wheat and conservation tillage practices have contributed to the spread of downy brome. Some herbicides labeled for downy brome control in winter wheat require incorporation. Incorporation of herbicides may not be compatible with reduced or …
Serum Progesterone Levels As A Means To Study Reproductive Function In Female Lethal Yellow Mice (Ay/A; C57bl/6j), Jon Andrew Gonsor
Serum Progesterone Levels As A Means To Study Reproductive Function In Female Lethal Yellow Mice (Ay/A; C57bl/6j), Jon Andrew Gonsor
Electronic Theses and Dissertations
This research concentrated on the reproductive problem associated with the Ay. Granholm and Breck reported that lethal yellow females never produced more than three litters when put into production at puberty. Ay/a females are as reproductively efficient as their a/a littermates at a young age. Ay/a females progressively become obese and reproductively senescent beyond the age of 120 days. The obese Ay/a females beyond 120 days exhibit lower uterine weights and depressed ovulation. Upon treatment with exogenous pituitary gonadotropins, follicle stimulating hormone (FSH) and luteinizing hormone (IH), the reproductively senescent AY/S! females' ovulatory rates were restored to near control levels. …
Unclos Iii And The South China Sea / By Gesine Ulrike Schmidt, Gesine Ulrike Schmidt
Unclos Iii And The South China Sea / By Gesine Ulrike Schmidt, Gesine Ulrike Schmidt
Electronic Theses and Dissertations
No abstract provided.
Approximations To Creating A Distributed Minix Operating System, Devendra Vithal Naniwadekar
Approximations To Creating A Distributed Minix Operating System, Devendra Vithal Naniwadekar
Electronic Theses and Dissertations
No abstract provided.
Gothicism In Washington Irving's Tales Of A Traveller, Murray Buford Montague
Gothicism In Washington Irving's Tales Of A Traveller, Murray Buford Montague
Electronic Theses and Dissertations
No abstract provided.
The Effect Of Ultrasound On Ion Transport Across Biological Membranes / By Jisen Wu, Jisen Wu
The Effect Of Ultrasound On Ion Transport Across Biological Membranes / By Jisen Wu, Jisen Wu
Electronic Theses and Dissertations
No abstract provided.
Lithostratigraphy Of The Jackson Gas Rock (Upper Cretaceous) In West Central Mississippi, Julie M. Mckibben
Lithostratigraphy Of The Jackson Gas Rock (Upper Cretaceous) In West Central Mississippi, Julie M. Mckibben
Electronic Theses and Dissertations
No abstract provided.
A Gathering Of Remarkable Women In The Dramas Of Athol Fugard, Arleen B. Dowd
A Gathering Of Remarkable Women In The Dramas Of Athol Fugard, Arleen B. Dowd
Electronic Theses and Dissertations
No abstract provided.
The Pharmacologic And Toxicologic Effects Of Di(Phenylisopropyl) Amine (Dpia) In Rats And Mice, Hailu Ketema
The Pharmacologic And Toxicologic Effects Of Di(Phenylisopropyl) Amine (Dpia) In Rats And Mice, Hailu Ketema
Electronic Theses and Dissertations
No abstract provided.
The Effects Of Smoking On Discriminative Force Emission In Humans, Michael J. Klitzke
The Effects Of Smoking On Discriminative Force Emission In Humans, Michael J. Klitzke
Electronic Theses and Dissertations
No abstract provided.
The Thunder Of The Wings : The Sonnets Of Robinson Jeffers, Susan Therese Moskop
The Thunder Of The Wings : The Sonnets Of Robinson Jeffers, Susan Therese Moskop
Electronic Theses and Dissertations
No abstract provided.
Pimozide's Effects On Rats' Performance In A Force-Proportionalreinforcement Paradigm : A Rate-Free Method Of Assessing Reinforcement Efficacy, Michael Austin Kirkpatrick
Pimozide's Effects On Rats' Performance In A Force-Proportionalreinforcement Paradigm : A Rate-Free Method Of Assessing Reinforcement Efficacy, Michael Austin Kirkpatrick
Electronic Theses and Dissertations
No abstract provided.
The Ten Most Successful Magazines Launched Between 1980 And 1985: A Comparative Study, Usha Ramachandran
The Ten Most Successful Magazines Launched Between 1980 And 1985: A Comparative Study, Usha Ramachandran
Electronic Theses and Dissertations
No abstract provided.
Development Of An Analytical Method For The Trace Determination Of Mycophenolic Acid By High Performance Liquid Chromatography Following Extraction Of The Compound From Feedstuffs, Tesfamichael Zeccarias Kahsai
Development Of An Analytical Method For The Trace Determination Of Mycophenolic Acid By High Performance Liquid Chromatography Following Extraction Of The Compound From Feedstuffs, Tesfamichael Zeccarias Kahsai
Electronic Theses and Dissertations
Mycophenolic acid is toxic to animals consuming it beyond a certain level and possesses antitumor activity. Not many methods for its trace analysis in feedstuffs and agricultural products have been reported. Thus, it is desirable to develop a standard analytical technique for such important compounds. The purpose of this investigation is to develop a technique or method sensitive enough to determine trace quantities of the compound. The method developed is based on solvent extraction from feedstuffs and detection by high performance liquid chromatography. Solvent extraction methods have given good results with low background interferences when cleaned up by column chromatography …
The Relationship Between Selected Social And Environmental Factors And Cancer Mortality By Planning District In South Dakota, 1960-1980, Mansour Haghighatian
The Relationship Between Selected Social And Environmental Factors And Cancer Mortality By Planning District In South Dakota, 1960-1980, Mansour Haghighatian
Electronic Theses and Dissertations
This paper investigated the association between selected social and environmental factors and age and sex-specific cancer mortality by planning district in South Dakota for 1960 to 1980. Social factors included median family income, percent of families in poverty, education, and urbanization. Environmental factors included herbicide use, pesticide use, and fertilizer use. Selected demographic variables, such as age, sex, and race were uses as control variables. Modernization theory was chosen as ·the conceptual framework. It was asserted that as the United States industrialized, standard of living also rose, and a shift from communicable diseases to degenerative illnesses as major causes of …
War And The Absurd In Ford's Parade's End, William Wayne Albright
War And The Absurd In Ford's Parade's End, William Wayne Albright
Electronic Theses and Dissertations
No abstract provided.
Effects Of Ascorbic Acid In Combination With Either Haloperidolor D-Amphetamine On The Operant Behavior Of Rats, Ruey-Ming Liao
Effects Of Ascorbic Acid In Combination With Either Haloperidolor D-Amphetamine On The Operant Behavior Of Rats, Ruey-Ming Liao
Electronic Theses and Dissertations
No abstract provided.
The Voice From The Torrent : Notes Toward The Meaning Of Poetry, Juliet Eagan
The Voice From The Torrent : Notes Toward The Meaning Of Poetry, Juliet Eagan
Electronic Theses and Dissertations
No abstract provided.
Algin/Calcium Gels In Solid-Muscle Structured Beef Steaks, Roger C. Johnson
Algin/Calcium Gels In Solid-Muscle Structured Beef Steaks, Roger C. Johnson
Electronic Theses and Dissertations
Alteration of the inherent characteristics of less preferred beef carcass portions to produce products with greater consumer appeal has been the ultimate goal of structured meat research. Consumer acceptance of structured products has been limited because of (1) low retail visibility, (2) diet/health concerns due to salt addition, and (3) undesirable uncooked product appearance due to discoloration and lack of fiber orientation. Development of solid-muscle structured products would alleviate these limitations and the negative influence the less desirable carcass portions have on total carcass value. Efficacy of a binding gel containing various concentrations of algin/calcium (Alg/Ca) and adipic acid (Ad) …
Lung Paraquat Content And Effects On The Lung Glutathione Antioxidant System, Nadph, And Polyamines Resulting From Intravenous Coinfusion Of Paraquat And Putrescine To Rats, Jacob R. Dunbar
Electronic Theses and Dissertations
Paraquat was administered to male, Sprague-Dawley rats via continous infusion, at dosage rates of 250 (LoPQ) or 500 (HiPQ) nmoles/hr for seven days. The purpose was to characterize the effects of prolonged, low blood levels of the herbicide on selected lung biochemical parameters. The efficacy of putrescine as an inhibitor of pulmonary paraquat accumulation, in vivo, was assessed in these animals by I.V. coinfusion of 2500 or 5000 nmoles putrescine/hr. Dose-dependent levels of both paraquat and putrescine were achieved by 18 hours and were maintained throughout the exposure period. Terminal lung paraquat content was also dose-dependent and up to 18-fold …