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Graduate Theses, Dissertations, and Problem Reports (ETD)

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Identifying Structural Differences In Mixed Mesophytic And Northern Hardwood Forests On The Monongahela National Forest Using Remote Sensing Data, John Richard Bender Jr. Aug 1999

Identifying Structural Differences In Mixed Mesophytic And Northern Hardwood Forests On The Monongahela National Forest Using Remote Sensing Data, John Richard Bender Jr.

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis is a study of field data and remotely sensed data to evaluate the structural diversity, texture, spectral and spatial differences between forest stands of three age classes (50--69, 70--89, and >90 years) in the Cheat District on the Monongahela National Forest. The structural diversity was determined with foliage-height profiles for 48 stands ranging from 52 to 148 years old. Structural diversity was highest in the 70--89 and >90 year old stands and lowest in the 50--69 year old stands. The structural characteristics of the 70--89 and >90 year old stands were characterized by greater numbers of larger trees, …

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Effect Of Allopurinol And Hemin On Some Biological Markers Of Aging In Broiler Chickens, Dinesh Singh Rathore Aug 1999

Effect Of Allopurinol And Hemin On Some Biological Markers Of Aging In Broiler Chickens, Dinesh Singh Rathore

Graduate Theses, Dissertations, and Problem Reports (ETD)

Uric acid has been hypothesized as one of the most important antioxidants in limiting the accumulation of advanced glycolated endproducts in broiler breeder hens. This study was designed to quantitatively manipulate the plasma uric acid concentrations using hemin and allopurinol and determine its effect on skin pentosidine, shear force value of Pectoralis major muscle, plasma glucose, body and breast weight, and chemiluminescence induced oxidative stress in broiler chickens. Allopurinol decreased plasma uric acid, ranging from 26% to 74%, with the most pronounced effect at wk 22. Hemin increased plasma uric acid concentrations between 11 and 14%. Skin pentosidine levels increased …

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Associations Of Egg Production With The Major Histocompatibility Complex In Broiler Breeder Hens, Becky Jean Tarleton Aug 1999

Associations Of Egg Production With The Major Histocompatibility Complex In Broiler Breeder Hens, Becky Jean Tarleton

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study documents effects of the major histocompatibility complex (MHC) on reproductive traits in a flock of Cobb X Cobb broiler breeder hens. The objective was to determine if the MHC affects reproduction of non-congenic broiler breeder hens. Genomic DNA was isolated from 35 hens. Restriction fragment length polymorphism (RFLP) analysis was performed on each sample, using a chicken class II MHC probe (Xu et al. 1989). Restriction endonuclease digestion using PvuII resulted in polymorphisms in all birds. Five polymorphic bands were identified. The largest bands, 7.5 kb and 5.4 kb, were present in one and four hens respectively. The …

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Influence Of Selection For Breast Muscle Mass On Ph And Metabolism Of Supracoracoideus Muscle From Male And Female Turkey, John Kenneth Yost Aug 1999

Influence Of Selection For Breast Muscle Mass On Ph And Metabolism Of Supracoracoideus Muscle From Male And Female Turkey, John Kenneth Yost

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this study was to determine if selection for increased breast muscle mass has affected the supracoracoideus muscle's ability to regulate pH during physical activity in turkeys. The lightweight male line (LM) had the greatest breast muscle mass as a percent of body weight (p < 0.0001), a lower average pH (6.68; p < 0.0001), and greater Lactate Dehydrogenase (293 mmol NADH min-1mug-1 ; p < 0.0001) and Glyceraldehyde Phosphate Dehydrogenase (0.4452 mmol NADH min-1mug-1; p < 0.05) activities than the HM and FL lines. The LM line had the highest ratio (2.33:1) (p < 0.05) of adult to neonatal myosin. Hens had greater breast muscle mass as a percent of body weight than males (p < 0.0001), and a lower average pH (6.62; p < 0.05). This study showed that genetic selection for breast muscle mass resulted in an increased ratio of adult to neonatal myosin and an increased anaerobic capacity, which may predispose birds to a lower ultimate pH during physical activity.

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Effect Of Sward Height And Concentrate Supplementation On Forage Dry Matter Intake, Digestibility And Grazing Time Of Spring-Calving Beef Cows, Ondieki J. Gekara Aug 1999

Effect Of Sward Height And Concentrate Supplementation On Forage Dry Matter Intake, Digestibility And Grazing Time Of Spring-Calving Beef Cows, Ondieki J. Gekara

Graduate Theses, Dissertations, and Problem Reports (ETD)

To establish the effect of sward height (SH) and concentrate supplementation on performance of grazing cattle, twenty-four cross bred Angus beef cow-calves were randomly assigned to two SH treatments (4--8 or 8--11 cm) with three supplement levels: 6.24, 3.12 or 0 kg/d. The study was conducted in three periods (P): May (P1), June/July (P2) and August (P3) in 1996. There was no SH x supplement level x period or SH x supplement level interaction (P > .10) on forage DMI, DMD or grazing time (GT). Cows on low SH had greater (P < .08) DMI and GT (P < .01) than cows on high SH. Forage DMI, DMD and GT decreased (P < .05) with supplementation. Grazing efficiency declined with supplementation and advancing grazing season (P < .01). Cows consumed more forage DM (P < .01) in P1 and P2 than P3. Forage DMI and grazing efficiency decreased with supplementation suggesting that supplemented cattle can optimally be grazed at SH < 8 cm.

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Forecasting Electricity Demand Using Regression And Monte Carlo Simulation Under Conditions Of Insufficient Data, Kathleen Ann Cullen Aug 1999

Forecasting Electricity Demand Using Regression And Monte Carlo Simulation Under Conditions Of Insufficient Data, Kathleen Ann Cullen

Graduate Theses, Dissertations, and Problem Reports (ETD)

The problem studied is that of a summer peak residential energy demand model for Appalachian Power Company's service area in West Virginia. By restricting the forecast to a region smaller than the state, serious data problems result due to insufficient data to obtain reliable forecasts.;Regression analysis and Monte Carlo Simulation are the two methods used to forecast energy demand. Both methods incorporate risk into the analysis in different ways. Regression analysis yields a measure of the reliability of the coefficients of the variables and of the reliability of the forecast. The resulting forecast and confidence limits of the forecast values …

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Occurrence, Etiology And Management Of Ringwomb In Ewes, Nancy Jean Kerr Aug 1999

Occurrence, Etiology And Management Of Ringwomb In Ewes, Nancy Jean Kerr

Graduate Theses, Dissertations, and Problem Reports (ETD)

Pedigrees of ewes with Ringwomb were studied to determine the etiology, incidence and treatment of Ringwomb. Purebred Suffolk and crossbred Hampshire and Shropshire ewes aged from one to seven years were observed over a period of five lambing seasons. The study was conducted on 24 clinical cases of ringwomb occurring in one flock. Ringwomb or incomplete cervical dilation accounted for an incidence of 20.5% (24/117) of all ewes lambing. The ewes affected were all daughters, granddaughters, or great-granddaughters of one particular sire used on the farm as a service sire. Because ringwomb does not typically affect ewes in two consecutive …

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Perceptions Of Students And Teachers Regarding Agriculture In Leflore County, Mississippi, Ronald L. Howard Aug 1999

Perceptions Of Students And Teachers Regarding Agriculture In Leflore County, Mississippi, Ronald L. Howard

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to assess the perceptions of public high school teachers and students in Leflore County, Mississippi regarding agriculture and provide baseline data regarding the perception of high school students and teachers residing in an agriculturally dependent county with no agricultural education program. A population of 240 high school teachers and students was surveyed for their perceptions regarding agriculture. All three public high schools in Leflore County were represented in this study. Over 65% of the sample resided in the city, while only 3% live on a farm. The major finding of this study was that …

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Social And Economic Impacts Of Wild Harvested Products, Brent Bailey Aug 1999

Social And Economic Impacts Of Wild Harvested Products, Brent Bailey

Graduate Theses, Dissertations, and Problem Reports (ETD)

Wild harvested products (WHPs) are plants and animals, or parts of them, that are harvested from their native habitats for sale, trade, or personal consumption, by harvesters who are not employed by others to collect them. WHPs embody a range of economic, cultural, and social values held by residents of rural areas. However, the products' significance to harvesters and communities, and their conservation status, have until recently been little studied.;Assessments of social and economic impacts of WHPs on households and communities were conducted in West Virginia and West Africa. Interviews with harvesters, dealers, and resource managers revealed the range of …

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Experiences Of Selected West Virginia Agriculture Teachers Who Have Established Aquaculture Units In Their Schools And Have Taught Aquaculture Classes For Two Years Or More, Paul A. Lovett Aug 1999

Experiences Of Selected West Virginia Agriculture Teachers Who Have Established Aquaculture Units In Their Schools And Have Taught Aquaculture Classes For Two Years Or More, Paul A. Lovett

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was designed to ascertain and record the experiences of West Virginia agriculture teachers who have established aquaculture units in their schools and have taught aquaculture for two or more years. This study will provide suggestions to those who may yet integrate aquaculture into their curriculum.;A "Focused Interview" was used to gather qualitative data from eight-experienced aquaculture teachers. The respondents answered eight questions that were asked and recorded by the secretary in agricultural and environmental education at WVU to eliminate bias and improve the validity of this study.;The results of this study found that agricultural teachers used aquaculture to …

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Acetaminophen Stimulates Proliferation Of Breast Cancer Cells, Eugenia Harnagea Theophilus Aug 1999

Acetaminophen Stimulates Proliferation Of Breast Cancer Cells, Eugenia Harnagea Theophilus

Graduate Theses, Dissertations, and Problem Reports (ETD)

Acetaminophen is a common analgesic/antipyretic. This research projected investigated the interaction of acetaminophen with breast cancer cells. The first goal was to determine if acetaminophen induces proliferation in cancerous and normal, human breast cells. Pharmacological concentrations of acetaminophen stimulated proliferation (3H-thymidine incorporation into DNA, % S phase cells, cell numbers) of estrogen and progesterone receptor positive (ER+/PR+) but not of ER-/PR+ or of ER-/PR- cancer or normal breast cells. The second goal was to determine if estrogen receptors play a role in acetaminophen-induced proliferation of ER+ breast cancer cells. Antiestrogens inhibited acetaminophen-induced proliferation, suggesting that ERs are involved in proliferation. …

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Alterations Of Vascular Endothelial Nitric Oxide Synthase Activity And Substrate Availability In Chronic Renal Disease, Shen Xiao Aug 1999

Alterations Of Vascular Endothelial Nitric Oxide Synthase Activity And Substrate Availability In Chronic Renal Disease, Shen Xiao

Graduate Theses, Dissertations, and Problem Reports (ETD)

Hypertension and other cardiovascular complications are the major causes of hospitalization and death in patients with chronic renal diseases (CRD). Our laboratory has previously reported that total nitric oxide (NO) production is decreased in CRD. The overall objective in my present series of studies is to investigate the alterations of endothelial NO system and the possible mechanisms in CRD.;In the study on CRD patients who still have residual renal function (∼30% of normal GFR), we found that the plasma from these patients did not affect L-arginine transport into endothelial cells but significantly inhibited endothelial nitric oxide synthase (eNOS) activity from …

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Effect Of Feeding Calcium Propionate On Carcass Composition, And Productive Performance Of Male Broilers, Robert Eric Jones Aug 1999

Effect Of Feeding Calcium Propionate On Carcass Composition, And Productive Performance Of Male Broilers, Robert Eric Jones

Graduate Theses, Dissertations, and Problem Reports (ETD)

Male broilers were fed ad libitum a control diet and diets with 1.5% and 2.7% calcium propionate (CaP). Broiler diets were supplemented with CaP for the first 2,4,6, or 8-week intervals. After being fed CaP for the previous mentioned times the broilers received a control diet for the remainder of each period. All broilers supplemented with CaP had lower body weights (p > .01). Fat pad weight was lower in CaP treated broilers slaughtered at 8 weeks of age (p > .01). Percent carcass fat was lower in CaP treated birds (p > .01). Percent carcass fat was lower in CaP treated birds …

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Effects Of Fermenten During The Dry And Early Lactation Periods Of Dairy Cows, Wellington Sifuna Mang'oli May 1999

Effects Of Fermenten During The Dry And Early Lactation Periods Of Dairy Cows, Wellington Sifuna Mang'oli

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fermenten is a commercially available by-product of lysine production recommended by the manufacturer (Biovance Technologies Inc., Omaha, NE) as a protein source for growing heifers and lactating cows. It has not been used in the diets of dry cows within 4 weeks of parturition. Three groups of 10 cows each, balanced for breed (Ayrshire and Holstein) and parity, were assigned to diets containing 0, 0.73 and 1.45 kg Fermenten dry matter/day. The diets were fed from 4 weeks prior to expected calving through 6 weeks of lactation. Dry matter intake of all diets decreased prior to calving, with the treatments …

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The Implementation Of Learning Strategies In The Design Of An On-Line Medical Course Supplement, Lee Ann Hill May 1999

The Implementation Of Learning Strategies In The Design Of An On-Line Medical Course Supplement, Lee Ann Hill

Graduate Theses, Dissertations, and Problem Reports (ETD)

Given the charge of integrating technology in the medical school curriculum, faculty members are faced with the challenge of designing new materials for their courses. Often, these materials become on-line resources such as hypermedia and electronic communication. Strategies may assist students who are unfamiliar with on-line materials to use such materials more effectively. This study investigated the elaborative interrogation strategy used in conjunction with on-line materials to promote more efficient processing of difficult material. Twenty second-year medical students volunteered to participate in the study. The course in which they were enrolled required the use of an on-line lecture supplement. The …

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Using Impedance Cardiography To Examine Changes In Hemodynamic Parameters During Heart Rate Biofeedback, Jeffrey Louis Goodie May 1999

Using Impedance Cardiography To Examine Changes In Hemodynamic Parameters During Heart Rate Biofeedback, Jeffrey Louis Goodie

Graduate Theses, Dissertations, and Problem Reports (ETD)

Reducing cardiovascular responses to stressors may help to reduce one's risk of developing cardiovascular disease. The present study examined the underlying hemodynamic changes that accompany heart rate (HR) response reduction to a stressor following HR feedback training. Twenty-five healthy college males were assigned to either a HR feedback training group (FB+) or a control group (FB--) and were presented with a videogame and mental arithmetic challenge, as HR, blood pressure, and impedance cardiography-derived measures were recorded. During the training sessions, the FB+ group received HR feedback and the FB-- group was not provided with HR feedback while playing the videogame. …

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Comparative Analysis Of The Promoters Of The Cyi-Cyiia-Cyiib Actin Gene Cluster In The Sea Urchin Strongylocentrotus Purpuratus, Ruth Lynn Dukes May 1999

Comparative Analysis Of The Promoters Of The Cyi-Cyiia-Cyiib Actin Gene Cluster In The Sea Urchin Strongylocentrotus Purpuratus, Ruth Lynn Dukes

Graduate Theses, Dissertations, and Problem Reports (ETD)

Three of the eight actin genes in the sea urchin Strongylocentrotus purpuratus were used for a comparative analysis. The cytoplasmic actin genes CyI, CyIIb and CyIIa are linked in the genome and encode very similar proteins. However, their spatial and temporal expression patterns are differentially regulated. The region of CyIIa upstream of the ATG and putative transcription start site was subcloned and sequenced. Sites of protein-DNA interaction were identified using DNaseI footprinting. Comparisons of this data with that previously obtained for CyI and CyIIb showed that while CyI and CyIIb share an identical CArG (or serum response element) and extensive …

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Mission Planning And Remote Operated Vehicle Simulation In A Virtual Reality Interface, Christopher Samuel Allport May 1999

Mission Planning And Remote Operated Vehicle Simulation In A Virtual Reality Interface, Christopher Samuel Allport

Graduate Theses, Dissertations, and Problem Reports (ETD)

Virtual reality simulations are finding applications in a wide range of disciplines such as surgical simulation, electronics training, and crime scene investigation. During the Mars Pathfinder Mission, in summer 1997, NASA scientists unveiled a new application of virtual reality for the visualization of a planetary surface. The success of this application led to a more concentrated effort for using virtual reality visualization tools during future missions. The thrust of this effort was to develop a new interface which would allow scientists to interactively plan experiments to be performed by the mission robots. This thesis covers two of the primary aspects …

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Effects Of Nicotine On Content Of Corticotropin Releasing Factor (Crf) In Rat Amygdala, Hypothalamus And Brain Stem, Sibonisiwe Ntini Masilela May 1999

Effects Of Nicotine On Content Of Corticotropin Releasing Factor (Crf) In Rat Amygdala, Hypothalamus And Brain Stem, Sibonisiwe Ntini Masilela

Graduate Theses, Dissertations, and Problem Reports (ETD)

Effects of 1.0 mg/kg and 0.4 mg/kg intraperitoneal nicotine on hypothalamic and extra hypothalamic levels of corticotropin releasing factor (CRF) were examined in 104 rats. CRF, a 41-amino acid peptide involved in responses to stress, fear and anxiety, influences the same neurotransmitter systems as nicotine, a psychoactive component of tobacco. Radioimmunoassays revealed that in macro-dissected hypothalami, 15 minutes treatment with 1.0 mg/kg nicotine significantly increased CRF content compared to no treatment. The 1.0 mg/kg dose did not elicit effects in macro-dissected amygdala and brain stem. With 0.4 mg/kg nicotine, no significant effects were observed in micro-dissected hypothalamic paraventricular nucleus, amygdaloid …

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Generalizability Of Cardiovascular Reactivity To Stress Among Doctoral Students Between Laboratory And Natural Settings, James P. Davig May 1999

Generalizability Of Cardiovascular Reactivity To Stress Among Doctoral Students Between Laboratory And Natural Settings, James P. Davig

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study extends previous work investigating the generalizability of cardiovascular reactivity to stress obtained in response to laboratory-based tasks to cardiovascular reactivity measured in response to a natural occurring event. Cardiovascular reactivity (HR, SBP, DBP) to stress was measured with ambulatory monitoring equipment in 6 male and 16 female healthy Caucasian graduate students in two settings: during five standardized laboratory stressors, and during the proposal or defense of a thesis or dissertation. Results indicate that for all cardiovascular parameters, the magnitude of change was greatest in response to the natural event, and that among the laboratory tasks, the greatest degree …

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Androgen-Induced Norepinephrine Release In Male Accessory Sex Organ Smooth Muscle Growth And Differentiation, Julie M. Kim May 1999

Androgen-Induced Norepinephrine Release In Male Accessory Sex Organ Smooth Muscle Growth And Differentiation, Julie M. Kim

Graduate Theses, Dissertations, and Problem Reports (ETD)

The goal of this research was to determine the role of norepinephrine (NE) in androgen-dependent pubertal proliferation and adult terminal differentiation in normal male accessory sex organ smooth muscle. The guinea pig seminal vesicle served as a model as its unique anatomy allowed clean harvest of smooth muscle without epithelium.;Androgen significantly increased in vivo DNA synthesis, total DNA, and NE release and down-regulated protein kinase C (PKC) in prepubertal seminal vesicle smooth muscle (SVSM) relative to prepubertal orchiectomized controls. High performance liquid chromotography quantified NE release as an increased concentration of (1) endogenous NE-metabolite, 3,4-dihydroxyphenolglycol per NE, and (2) NE …

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Preference Between Predictable And Unpredictable Administrations Of Carbon Dioxide-Enriched Air, Carl Wilbourne Lejuez May 1999

Preference Between Predictable And Unpredictable Administrations Of Carbon Dioxide-Enriched Air, Carl Wilbourne Lejuez

Graduate Theses, Dissertations, and Problem Reports (ETD)

Predictability of panic attacks has been identified as an important factor in the development, maintenance, and treatment of panic disorder. Although animal studies typically have found a preference for signaled (predictable) over unsignaled (unpredictable) aversive events, results with human participants have been less clear. Because preference for predictability has a wide range of clinical implications, we examined human preference for predictability in a biological challenge paradigm. Further, we examined the differential effects of predictability as a function of anxiety sensitivity and gender. In general, females showed a significantly greater preference for predictability compared to males, as did high anxious participants …

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Assessing The *Discriminative Properties Of Response -Reinforcer Relations Using Concurrent Schedules Of Reinforcement, Josue P. Keely May 1999

Assessing The *Discriminative Properties Of Response -Reinforcer Relations Using Concurrent Schedules Of Reinforcement, Josue P. Keely

Graduate Theses, Dissertations, and Problem Reports (ETD)

The discriminative properties of schedules of reinforcement have been assessed by making a choice response conditional upon some aspect of the schedule that produced the choice component. The discriminative properties of concurrent schedules of reinforcement and the effect of disruptions in the response-reinforcer relation were investigated using conditional-discrimination procedures. In the first experiment, choice components were produced by responding to one of two variable-interval (VI) schedules. Disruptions in the temporal contiguity between a VI response and a choice component were introduced by arranging a percentage of choice components according to a variable-time schedule. Choice responding was a function of the …

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Alterations In Intrinsic Heart Rate In Endotoxemia, Peter Drew Wearden May 1999

Alterations In Intrinsic Heart Rate In Endotoxemia, Peter Drew Wearden

Graduate Theses, Dissertations, and Problem Reports (ETD)

After much early debate, it is now well recognized that the origin of the heart beat is myogenic, or intrinsic, to the heart. It has been felt that the intrinsic heart rate (IHR) is constant and that the observed heart rate is controlled by tonal alterations in the activity of the autonomic nervous system in response to various stimuli. Some investigators have recognized, however, that the intrinsic heart rate (IHR) can be altered in certain conditions. Sepsis, or the host response to bacterial infection, is recognized as a stress to the host that results in decreased myocardial contractility and tachycardia. …

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Regulation Of Glucose -6 -Phosphate Dehydrogenase By Polyunsaturated Fatty Acids In Cultured Rat Hepatocytes, Laura Petrosky Stabile May 1999

Regulation Of Glucose -6 -Phosphate Dehydrogenase By Polyunsaturated Fatty Acids In Cultured Rat Hepatocytes, Laura Petrosky Stabile

Graduate Theses, Dissertations, and Problem Reports (ETD)

The goal of this research is to understand the molecular mechanism(s) by which polyunsaturated fatty acids inhibit gene expression of the lipogenic enzymes. The model enzyme which we are using to study this phenomenon is liver glucose-6-phosphate dehydrogenase (G6PD). In order to determine if regulation of G6PD occurred at a transcriptional or a posttranscriptional step in rat hepatocytes, enzyme activity, mRNA accumulation and transcriptional activity of the G6PD gene were measured in the presence and absence of a polyunsaturated fatty acid, arachidonic acid. Insulin and glucose stimulated a 5- to 7-fold increase in G6PD activity and mRNA. This increase was …

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The Effects Of Varying Concentration And Duration Of Cfc-113 Exposure On End-Exhaled Breath Cfc-113 Concentration, Demetra Grace Dalamagas May 1999

The Effects Of Varying Concentration And Duration Of Cfc-113 Exposure On End-Exhaled Breath Cfc-113 Concentration, Demetra Grace Dalamagas

Graduate Theses, Dissertations, and Problem Reports (ETD)

Subjects were exposed to different concentrations of CFC-113 for variable duration while conducting 30-minute exercise regiments. End-exhaled breath samples were collected 25, 30 and 35 minutes after the exercise regiment and quantified using gas chromatography. Three comparative studies were conducted.;A short duration administration delivered at the beginning or at the end of the regiment was compared to a long duration administration delivered at the beginning or at the end of the exercise regiment. The second study compared breath samples when 500 ppm of CFC-113 was administered at the beginning or end six minutes of the regiment. The third compared continuous …

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Theory Of Mind Development And Executive Functioning In Elementary School Children, Dana Lee Futoran May 1999

Theory Of Mind Development And Executive Functioning In Elementary School Children, Dana Lee Futoran

Graduate Theses, Dissertations, and Problem Reports (ETD)

The following study explored the role of verbal ability and executive functioning in theory of mind understanding in elementary school children. Scores on measures of language comprehension, verbal ability (sentence memory, and forward digit span), matrix completion, executive functioning (backward digit span), and second-order theory of mind tasks were obtained. Partial correlations of the measures controlling for age revealed verbal ability to be significantly correlated with theory of mind comprehension. A regression analysis demonstrated that auditory language comprehension was the only variable, in addition to age, that explained unique variance in performance on a recursive thinking task. Possible explanations are …

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Survey And Home Range Analyses Of Wintering Shorebirds Using The Lanark Reef Shorebird Complex, Franklin Co., Florida, Christine Marie Gunnels May 1999

Survey And Home Range Analyses Of Wintering Shorebirds Using The Lanark Reef Shorebird Complex, Franklin Co., Florida, Christine Marie Gunnels

Graduate Theses, Dissertations, and Problem Reports (ETD)

Radio telemetry was used to document spatial variation in use by wintering shorebirds at a series of sites believed to form the Lanark Reef Shorebird Complex in Franklin County. Fifty and 95% convex polygon home range estimate for Willets (Catoptrophorus semipalmatus) averaged 0.52 km 2 and 14.85 km2, respectively. Fifty and 95% convex polygon home range estimate for the Black-bellied Plover (Pluvialis squatarola) averaged <0.01 km2 and 0.10 km 2, respectively. Fifty and 95% convex polygon for the Marbled Godwit (Limosa fedoa) and Long-billed Curlew (Numenius americanus ) was 0.32 km2, and 6.72 km2, and 0.36 km2 and 24.41 km2, respectively. Black-bellied Plovers appeared to have the smallest distance between locations followed by Willets, Long-billed Curlews and Marbled Godwits.;Replicate shorebird surveys were conducted on the reef and count data were regressed against four environmental variables (wind speed, tide height, cloud cover, and temperature). Regression results (R2 adj) accounted for 45% and 66% of the variance in total shorebird counts on the Reef for 1996 and 1997, respectively. Shorebird total counts were positively correlated with tide height for 1996 and 1997 (P < 0.01).

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Regulation Of Heme Biosynthesis Targets The Key Enzyme Hema By A Mechanism Of Protein Stabilization In Salmonella Typhimurium, Liying Wang May 1999

Regulation Of Heme Biosynthesis Targets The Key Enzyme Hema By A Mechanism Of Protein Stabilization In Salmonella Typhimurium, Liying Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Heme serves as a cofactor of cytochromes and catalases. It is essential for energy generation and in defense against toxic hydrogen peroxide in nearly all cells including Salmonella typhimurium and Escherichia coli. Indirect evidence has suggested that heme synthesis is a regulated process. Little is known about how heme synthesis is regulated in enteric bacteria even though the heme synthetic pathway is genetically well-defined. This research represents the first report that heme synthetic regulation affects the first committed heme pathway enzyme, glutamyl-tRNA reductase (HemA), by an unusual mechanism.;HemA, encoded by hemA gene, catalyzes the rate-limiting step of heme biosynthesis. This …

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"To Make The Crooked Ways Straight And The Rough Ways Smooth": The Federal Government's Role In Laying Out And Building The Cumberland Road., Billy Joe Peyton Jan 1999

"To Make The Crooked Ways Straight And The Rough Ways Smooth": The Federal Government's Role In Laying Out And Building The Cumberland Road., Billy Joe Peyton

Graduate Theses, Dissertations, and Problem Reports (ETD)

By 1800 the United States had emerged from the turmoil of its Revolutionary era to begin focusing on economic growth and westward expansion. To open up the vast trans-Appalachian region the federal government in 1802 began formulating plans to fund and build a "national road to connect the eastern seaboard with the "western waters. After considerable debate, Congress in 1806 passed an act that called for laying out and making a road from the Potomac River at Cumberland, Maryland, to the Ohio River at Wheeling, (West) Virginia. A six-member surveying team led by three presidentially-appointed commissioners completed the arduous task …

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