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Articles 1 - 5 of 5
Full-Text Articles in Agriculture
Surveillance For Ticks And Tick-Borne Pathogens In Kentucky, Anna Rosalee Pasternak
Surveillance For Ticks And Tick-Borne Pathogens In Kentucky, Anna Rosalee Pasternak
Theses and Dissertations--Entomology
Tick-borne diseases are an emerging threat to human and animal health. In Kentucky, tick-borne disease surveillance has identified rising incidences of spotted fever rickettsiosis, ehrlichiosis, and Lyme disease. Since these diseases occur through the bites of infected ticks, effective prevention efforts are reliant upon knowing where the risk of exposure to tick bites exists. Historical data on tick distribution in Kentucky is variable, with very little reported on a statewide scale, leaving vector control workers, public health personnel, physicians, veterinarians, and others to rely on outdated, intermittent, or out-of-state information. In my dissertation, I surveyed ticks and select tick-borne pathogens …
Biology And Detection Of Pregnanes During Late Gestation In The Mare, Michelle Arelia Ann Wynn
Biology And Detection Of Pregnanes During Late Gestation In The Mare, Michelle Arelia Ann Wynn
Theses and Dissertations--Veterinary Science
Progesterone in the mare declines to almost undetectable concentrations in late gestation. It’s metabolized into several pregnanes, some circulating at very high concentrations. Although the function of many pregnanes remains unclear, 5α-dihydroprogesterone and allopregnanolone are bioactive. Measurements of pregnanes in late gestation are typically by immunoassay, although results are confounded by cross-reactivity with related pregnanes. Conversely, liquid chromatography tandem mass spectrometry (LC-MS/MS) allows differentiation of individual pregnanes. The purposes of these studies were: 1) to evaluate the ability of a 5α-reductase inhibitor, dutasteride, to alter pregnane metabolism and pregnancy outcome, 2) to evaluate changes in target pregnanes in late gestation …
Riding Through Life: A Lifespan Study Of The Attitudes, Behaviors, And Areas Of Educational Opportunity For Female Equestrians Toward Bra Use And Health Outcomes When Engaged In Equestrian Sports, Karin Pekarchik
Theses and Dissertations--Community & Leadership Development
Equestrian sport is a popular exercise choice for females of all ages, although the links between this exercise choice, health outcomes, and risk to health have not been thoroughly examined. These issues are of particular interest because the female equestrian has the opportunity to ride and/or compete for decades, from early to very late in life, covering almost the full sequence of the female lifespan. Equestrian sports provide physical activity through riding and caring for the horse, and promote positive mental outcomes through tangible practices, such as engaging in physical activity and hard work, goal-setting, acquisition of skills, and participation …
Subacute Effects Of Prallethrin On Behavior Of Mosquitoes (Diptera: Culicidae) And Other Human Disease Vectors, Kyndall C. Dye
Subacute Effects Of Prallethrin On Behavior Of Mosquitoes (Diptera: Culicidae) And Other Human Disease Vectors, Kyndall C. Dye
Theses and Dissertations--Entomology
The synthetic pyrethroid, prallethrin, is an active ingredient in a widely marketed ultralow volume (ULV) mosquito adulticide. Volatilized prallethrin is intended to stimulate mosquito flight, increasing overall effectiveness of the adulticide. However, field tests using volatilized prallethrin did not produce significant differences in various vector trap catches, suggesting prallethrin’s behavioral effects are not viable. Laboratory tests were conducted to evaluate prallethrin’s effect on flight behavior of adult female Asian tiger mosquitoes (Aedes albopictus). Mosquitoes were divided into three groups; a control, those exposed to volatilized prallethrin, and those exposed to a simulated ULV application at label rates. After …
Enantioselective Demethylation: The Key To The Nornicotine Enantiomeric Composition In Tobacco Leaf, Bin Cai
Enantioselective Demethylation: The Key To The Nornicotine Enantiomeric Composition In Tobacco Leaf, Bin Cai
Theses and Dissertations--Plant and Soil Sciences
Nicotine and nornicotine are the two main alkaloids that accumulate in Nicotiana tabacum L. (tobacco), and nornicotine is the N-demethylation metabolite of nicotine. Nicotine is synthesized in the root, and probably primarily in the root tip. Both nicotine and nornicotine exist as two isomers that differ from each other by the orientation of H atom at the C-2' position on the pyrrolidine ring. (S)-nicotine is the dominant form in tobacco leaf and the enantiomer fraction of nicotine (EFnic), the fraction of (R)-enantiomer over the total nicotine, is approximately 0.002. Despite considerable efforts to elucidate nicotine and nornicotine …