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Effects Of Work Stoppages At Selected Steel Mills On Production And Safety Systems, Daniel Hartley May 2001

Effects Of Work Stoppages At Selected Steel Mills On Production And Safety Systems, Daniel Hartley

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this research was to identify if there was a significant difference between the OSHA recordable incidence rates at a selected steel manufacturer prior to a major work stoppage and subsequent to the work stoppage. Monthly and quarterly time periods were evaluated to determine the level of change that occurred between prior and post work stoppage periods. Raw steel production was also evaluated to determine the effects of the work stoppage on production totals. OSHA recordable incidence rates were generally lower after the work stoppage, while production totals were higher after the work stoppage. In many instances the …

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Fastener Withdrawal Resistance Of Wood-Based Composite Panel Products, Steven M. Cook May 2001

Fastener Withdrawal Resistance Of Wood-Based Composite Panel Products, Steven M. Cook

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this research project was to evaluate the performance of currently available wood-based panel products as sub-floor materials when used under quality oak strip flooring and exposed to cyclic EMC conditions. The critical evaluation criterion was the fastener holding capacity of various sub-floor materials. To accomplish this, investigation of the in-plane density variations of currently available panel products was performed, as was an investigation of the relationship between panel density and the fastener holding capacity of different panel materials. In addition, a comparison of the fastener holding capacity of six different panel products was investigated during and after …

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Objective And Subjective Personality Characteristics Of Medical Students, Heather Anderson Meit May 2001

Objective And Subjective Personality Characteristics Of Medical Students, Heather Anderson Meit

Graduate Theses, Dissertations, and Problem Reports (ETD)

The present study viewed personality characteristics of medical students using both objective (i.e., a valid and reliable psychological instrument) and subjective methods (i.e., medical students' self-ratings of how they viewed themselves and how they believed others viewed them). The 16 Personality Factor Questionnaire (16PF, 5th Edition) and a researcher developed instrument, the Subjective Rating Form (SRF), were utilized in this study. Significant differences were found in 16PF scores from entry to medical school (Time 1) to exit from medical school (Time 2). Significant differences were also observed when SRF scores were compared between Self at Time 1 (retrospectively), Self at …

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Problem -Solving Communication Training And Behavioral Exchange For The Treatment Of Parent -Adolescent Conflict, Ethan Sage Long May 2001

Problem -Solving Communication Training And Behavioral Exchange For The Treatment Of Parent -Adolescent Conflict, Ethan Sage Long

Graduate Theses, Dissertations, and Problem Reports (ETD)

Elevated levels of parent-adolescent conflict have been associated with a number of adolescent problem behaviors. One treatment that appears to be effective in reducing family conflict is Problem Solving Communication Training (PSCT). Research has indicated that PSCT appears to be an effective and acceptable treatment program for reducing parent-adolescent conflict. However, researchers have suggested some possible limitations associated with PSCT treatment. Many of the identified limitations of PSCT potentially may be addressed with the inclusion of a Behavioral Exchange (BE) treatment component. Evidence supporting this hypothesis is provided by the documented success of Behavioral Marital Therapy, a treatment package that …

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Wood Deck Bridges-Stress Laminated Wood Panels On Steel Beams, Bryan Lin King May 2001

Wood Deck Bridges-Stress Laminated Wood Panels On Steel Beams, Bryan Lin King

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this project was to simulate a stress laminated timber bridge deck model stiffened with wide flange steel stringers for performance monitoring. The simulation accounted for typical HS-20 repetitive loadings offered by a mechanically controlled actuator.;Based on the results incorporated in this report and additional projects accredited in the literature review, some general recommendations can be established regarding the best approach for constructing timber bridges in the future.;In general, short span prestressed timber bridges appear to be a reliable alternative in rural bridge design applications. Pure aesthetics responsive to timber construction add to the allure of this optional …

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Development Of An Apparatus To Quantify The Volitional Muscle Performance Of Rat Plantar Flexors In Vivo, Vineet Shastri May 2001

Development Of An Apparatus To Quantify The Volitional Muscle Performance Of Rat Plantar Flexors In Vivo, Vineet Shastri

Graduate Theses, Dissertations, and Problem Reports (ETD)

An in vivo animal model was developed to study the effects of voluntary eccentric, concentric, and isometric muscle actions and varying work-rest cycles on muscle performance, behavior, and histological and biochemical response. Using a custom-designed apparatus that was attached to a standard operant chamber, rats were operantly conditioned with food rewards to perform a voluntary lifting task to generate controlled movement of the plantar flexors. An opening in the front panel of the operant chamber allowed the rat to enter a Plexiglas tube that was mounted vertically to restrict the movement of the rat. A load cell was embedded in …

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Relational Specification As A Testing Oracle, Harjinder Sandhu May 2001

Relational Specification As A Testing Oracle, Harjinder Sandhu

Graduate Theses, Dissertations, and Problem Reports (ETD)

Software engineering community is well aware of the usefulness of formal methods for specifying, designing and testing of the software. Despite this testing literature rarely deals with specification based testing. Testing from formal specifications offers a simple, structured and more rigorous approach to the functional tests than testing techniques. An important application of specification in testing is providing test oracles. The rise of use of computers in control safety critical systems, i.e., flight control systems, necessitates that rigorous system testing is performed before the deployment. In flight control systems, requirements are mostly concerned with the safety and maneuverability of an …

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Teaching Children Qualitative Analysis Of Fundamental Motor Skill, Guoli Liang May 2001

Teaching Children Qualitative Analysis Of Fundamental Motor Skill, Guoli Liang

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study is to examine the effects of a qualitative analysis instructional program on elementary school-aged children. More specifically, the study is designed to explore the possibility of teaching elementary school-aged children to observe and detect the errors of individuals performing manipulative motor skills at various skill levels. Can children of those ages (1) initially observe and detect errors, (2) improve their observation and detection after a training intervention, and (3) maintain any such gains?;The study involved a 2 (experimental group/control group) x 2 (third grade/fifth grade) x 3 (pretest/posttest/retention test) design. The participants involved in this …

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Studies Of The Initial Stage Of Silicon Carbide Growth On Silicon, Katherine Stewart Ziemer May 2001

Studies Of The Initial Stage Of Silicon Carbide Growth On Silicon, Katherine Stewart Ziemer

Graduate Theses, Dissertations, and Problem Reports (ETD)

The lack of understanding concerning the initial stage of silicon carbide (SiC) growth on silicon (Si) substrates gives rise to heated debates on the growth mechanisms, the characteristics of the "optimal" initial layers, and the processing parameters necessary to produce high-quality cubic or beta silicon carbide (beta-SiC) on these initial layers. If the potential of beta-SiC as a semiconductor for electronic devices is to be realized, the growth of the initial layers (i.e. the initial stage of growth) must be understood and then controlled.;This dissertation presents results from the comparison of the initial stages of beta-SiC growth by gas source …

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Sensor Technology For The Breast Examination Training Instrument, Bratislav Matic May 2001

Sensor Technology For The Breast Examination Training Instrument, Bratislav Matic

Graduate Theses, Dissertations, and Problem Reports (ETD)

Latest medical research has shown high percentage of American women, diagnosed with breast cancer. If detected in its early stage, cancer can be treated successfully. Breast examination might be obtained through three procedures: breast self-examination (BSE), clinical breast examination (CBE) and mammography. Project BETI was developed with idea of educating and training women and health care professionals in BSE. This instrument consists of a silicone breast model, tactile sensors and serial communication capability. Software was developed for a generic PC that supports an integrated system including: (1) an interactive video demonstrating BSE techniques, (2) a practical examination using the instrumented …

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Amiodarone-Induced Pulmonary Toxicity In F344 Rats, Michael Douglas Taylor May 2001

Amiodarone-Induced Pulmonary Toxicity In F344 Rats, Michael Douglas Taylor

Graduate Theses, Dissertations, and Problem Reports (ETD)

Amiodarone (AD) is gaining support as a first-line antiarrhythmic drug despite its potentially fatal pulmonary toxicity involving inflammation and fibrosis. The goals of this study were to develop and characterize a rat model of amiodarone-induced pulmonary toxicity (AIPT). A protocol was developed in which male F344 rats were instilled intratracheally (i.t.) with AD (6.25 mg/kg with a 3.125 mg/ml solution) in sterile water or the sterile water vehicle on days 0 and 2, a protocol that led to the development of pulmonary fibrosis on day 28 in the AD-treated animals. Bronchoalveolar lavage (BAL) resulted in the increased recovery of alveolar …

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Analyses Of Coal Extraction And Spoil Handling Techniques In Mountainous Areas, Shiva Prasad B. Kolli May 2001

Analyses Of Coal Extraction And Spoil Handling Techniques In Mountainous Areas, Shiva Prasad B. Kolli

Graduate Theses, Dissertations, and Problem Reports (ETD)

Surface mining of multiple seams by mountaintop mining methodology is complex in the Appalachian region of West Virginia. Mining operations in these mountainous areas can be considered as customized forms of surface mining techniques. The customization of the mining methods is greatly dominated by the location, geology, and stratigraphic succession of coal seams in the area.;Owing to its unique mining operations, and the environmental effects associated with it, mountaintop removal method of mining has become an issue of public concern. The pertinence of the present mountaintop mining operations and reclamation techniques, with respect to being in compliance with Surface Mining …

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Design And Simulation Of High-Performance Hybrid Electric Vehicle Powertrains, Samuel P. Taylor May 2001

Design And Simulation Of High-Performance Hybrid Electric Vehicle Powertrains, Samuel P. Taylor

Graduate Theses, Dissertations, and Problem Reports (ETD)

The intent of this study was the design, modeling, and simulation of several high-performance light-duty hybrid electric vehicle powertrains. The design requirements of each proposed configuration are to meet or exceed a set of performance baselines based on a composite set of particular high-performance conventional vehicles presently available, while demonstrating increased fuel efficiency over regulated government cycles.;Several hybrid powertrain configurations were studied; however, the most promising and feasible for production designs were selected for further modeling. All of the proposed designs are post-transmission parallel hybrids for primarily performance reasons, with the auxiliary motive power coming after the transmission, utilizing a …

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Cmos Fingerprint Sensor Electrostatic Modeling, Praveen Kumar Soora May 2001

Cmos Fingerprint Sensor Electrostatic Modeling, Praveen Kumar Soora

Graduate Theses, Dissertations, and Problem Reports (ETD)

The use of Biometrics in personal identification is an important emerging technology in modern electronic society. Fingerprints are one of the most popular biometric technologies, currently used in majority of biometric applications. In recent years, solid-state capacitive fingerprint sensors which image fingerprints using Silicon CMOS Technology are gaining much acceptance in the market. This research work is carried out to quantify and explore approaches for achieving improved sensitivity of the capacitive imaging process through reduction of parasitic capacitances and sensor cell scaling for future generation devices. Evaluation of sensor cell and array geometries was completed using a commercial 2-D electrostatic …

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Stress Concentration Around Dowel Bars In Jointed Rigid Concrete Pavements, Mourad Youssef Riad May 2001

Stress Concentration Around Dowel Bars In Jointed Rigid Concrete Pavements, Mourad Youssef Riad

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this study, the magnitude and state of stresses induced around dowel bars were identified through detailed 3D Finite Element (3DFE) modeling of dowel jointed rigid pavement structures. Both straight and skewed joints were modeled using extremely fine meshing that allows accurate modeling of the friction and separation at dowel concrete interfaces. The model response was examined for the case of joint loading with an equivalent axle load of 18000 lb. It was found that significantly large tensile stresses develop in the concrete on both sides of the loaded dowel. The magnitude of the tensile stress approaches the tensile modulus …

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Effects Of Sediment Upon Benthic Macroinvertebrates In Forested Northern Appalachian Streams, Michael Douglas Kaller May 2001

Effects Of Sediment Upon Benthic Macroinvertebrates In Forested Northern Appalachian Streams, Michael Douglas Kaller

Graduate Theses, Dissertations, and Problem Reports (ETD)

Excess fine sediment negatively influences the fauna of North American streams. With the current emphasis on multiple-use forests, the question is not whether fine sediment is detrimental, but what is the threshold of fine sediment that is tolerable?;To determine a threshold tolerance of fine sediment, a two-part project investigated the influence of fine sediment upon benthic macroinvertebrates. The first part encompassed two experiments in sediment manipulation in 1999 and 2000. The experiments tested benthic macroinvertebrate metric sensitivity to a range of fine sediment treatments. The second part involved four seasonal surveys of seven streams to determine the threshold amount of …

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Fourth Grade Elementary Students' Perception Of The Motivational Aspects Of Using Computers To Write In The "Student As Authors" Project, Karla Ribeiro De Assis May 2001

Fourth Grade Elementary Students' Perception Of The Motivational Aspects Of Using Computers To Write In The "Student As Authors" Project, Karla Ribeiro De Assis

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to describe fourth grade elementary students' perception of the motivational aspects of using computers to write in the "Student as Authors" Project. The following questions were answered in this research: (a) how do fourth grade students perceive the importance of computers in the "Students as Authors" Project? (b) what are the motivational aspects of using a computer to write in the "Student as Authors" Project from fourth grade students' perspective? The researcher used questionnaire, and interviews as modes of data collection. This study indicates that students consider computer important in the "Student as Authors" …

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Evaluation Of Exhaust Flowrate Measurement Techniques For A Mobile Emissions Monitoring System, Eric Todd Meyer May 2001

Evaluation Of Exhaust Flowrate Measurement Techniques For A Mobile Emissions Monitoring System, Eric Todd Meyer

Graduate Theses, Dissertations, and Problem Reports (ETD)

West Virginia University designed and developed Mobile Emissions Monitoring System (MEMS) for the six settling Heavy-Duty Diesel Engine (S-HDDE) manufacturers. The MEMS measures emissions concentrations while operating in a real world environment. The best method for measuring the emissions concentrations was found to be through raw exhaust sampling. In order to properly calculate the emissions concentrations the total exhaust flowrate through the engine must be determined. The devices evaluated were an Annubar, an Accutube, a hot film anemometer, a Pitot static tube, a venturi, and a vortex shedder.;The evaluation of the devices was broken down into two parts, the first …

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Pretreatment And Enzymatic Hydrolysis Of Lignocellulosic Materials, Wei Cheng May 2001

Pretreatment And Enzymatic Hydrolysis Of Lignocellulosic Materials, Wei Cheng

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research aims to increase the efficiency of utilizing lignocellulosic materials, which have great potential as future energy and chemical feed stocks, and may finally substitute the diminishing hydrocarbon resources. This work involved two main parts: (a) comparison of efficiency of different pretreatment methods on lignocellulosic materials; and (b) enhancing enzymatic hydrolysis in a continuous tubular membrane reactor (TMR) process.;The alkaline oxidation pretreatment method was found to be more efficient than ammonia steeping pretreatment in lignin removal and digestible cellulose enrichment for the raw substrates chosen for this study, namely, yellow poplar (hardwood) and corn cob (herbaceous crop).;A combination of …

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Coating Studies And Video Imaging Of The Flow Patterns Of Tablets In A Semi-Circular Fluidized Bed, Ganeshkumar A. Subramanian May 2001

Coating Studies And Video Imaging Of The Flow Patterns Of Tablets In A Semi-Circular Fluidized Bed, Ganeshkumar A. Subramanian

Graduate Theses, Dissertations, and Problem Reports (ETD)

Particle coating is of increasing interest in the Pharmaceutical Industry, with more and more manufacturers moving towards production of tablets with layers of coating. When a tablet is coated with a drug, the amount of coating that each tablet possesses becomes very critical, as it constitutes the total dosage. The amount and consistency of drug coated on the tablet depends on the dynamics of the tablet in the vicinity of the spray zone.;The objective of this work was to study the dynamics of particle motion (large placebo tablets, 8mm diameter and sphericity factor, &phis; ≠ 1) in the vicinity of …

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Nutrient Content Of School Lunches And Packed Lunches As Consumed By Elementary School Students, Pamela Cheryl Hamilton May 2001

Nutrient Content Of School Lunches And Packed Lunches As Consumed By Elementary School Students, Pamela Cheryl Hamilton

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study compared nutrient content and intake of student school and home-packed lunches. Food intake was estimated by weighing the food and leftovers of 114 elementary school children. Eighty-one percent (n = 92) consumed school lunches and nineteen percent (n = 22) consumed packed lunches. A nutrient analysis was conducted using Nutritionist V. Significant differences between the two types of lunch were determined using ANOVA and Tukeys Test (HSD.UEN), p < 0.05.;School lunches were nutritionally superior (p < 0.01) for protein, vitamin A, vitamin D, riboflavin, vitamin B6, folate, vitamin B 12, pantothenic acid, phosphorus, magnesium, zinc, and dietary fiber; (p < 0.05) for calcium and niacin.;After considering food waste, intake from school lunch remained significantly higher (p < 0.01) for vitamin D, vitamin B12, pantothenic acid, phosphorus, magnesium, and zinc; (p < 0.05) for riboflavin, vitamin B 6, folate, and calcium.;It was also noted that intake of milk and other dairy foods was higher (p < 0.01) from school lunches.

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Attitudes, Knowledge, And Implementation Of Biotechnology And Agriscience By West Virginia Agricultural Education Teachers, Jason E. Hughes May 2001

Attitudes, Knowledge, And Implementation Of Biotechnology And Agriscience By West Virginia Agricultural Education Teachers, Jason E. Hughes

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to provide information on the attitudes toward and knowledge level of biotechnology and agriscience as well as activities conducted which demonstrate implementation of biotechnology and agriscience by West Virginia Agricultural Education teachers.;Data was collected via a questionnaire. Knowledge level, teaching methods used, attitudes of the subject and teaching responsibilities, barriers to teaching, and preferred information sources of biotechnology and agriscience were the major parts. Demographics and level of science knowledge were other parts of the questionnaire.;A major finding of the study was that West Virginia agricultural education teachers possess a positive attitude towards biotechnology, …

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Evaluation Of A Fall Stocking Of Adult And Intermediate Largemouth Bass (Micropterus Salmoides) Into Two Ohio River Embayments, Eric C. Janney May 2001

Evaluation Of A Fall Stocking Of Adult And Intermediate Largemouth Bass (Micropterus Salmoides) Into Two Ohio River Embayments, Eric C. Janney

Graduate Theses, Dissertations, and Problem Reports (ETD)

On October 20, 1998 the West Virginia Division of Natural Resources stocked adult and intermediate size hatchery reared largemouth bass (Micropterus salmoides) into two Ohio River embayments in an attempt to supplement existing populations. Prior to stocking each fish was fitted with an anchor tag and a visible implant elastomer mark to help ensure recognition as a hatchery-origin fish. The objective of this study was to evaluate the effectiveness of this stocking event for enhancing largemouth bass populations and improving angling opportunities in Ohio River embayment areas. A multifaceted sampling approach was incorporated to: (1) evaluate the persistence and return …

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Effects Of Nitrogen And Cutting Management On Root Growth And Productivity Of A Kentucky Bluegrass (Poa Pratensis L.) And White Clover (Trifolium Repens L.) Pasture, Gina Marie Kertulis May 2001

Effects Of Nitrogen And Cutting Management On Root Growth And Productivity Of A Kentucky Bluegrass (Poa Pratensis L.) And White Clover (Trifolium Repens L.) Pasture, Gina Marie Kertulis

Graduate Theses, Dissertations, and Problem Reports (ETD)

Nitrogen (N) and defoliation effects on productivity, root growth and soil nitrate (NO3-) in a Kentucky bluegrass and white clover pasture were examined. Nitrogen was applied annually in two equally split applications at rates of 0, 80 or 160 kg N ha -1. After reaching 12.7 cm, plants were cut to 2.5, 5.1 or 7.6 cm. Herbage was analyzed for yield, crude protein (CP), neutral detergent fiber and acid detergent fiber. Root samples were divided into three depths: 0.0--5.1, 5.1--10.2 and 10.2--20.3 cm, and analyzed for volume, dry weight and length. Soil NO3- was measured. At the 2.5 cm cut …

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Evaluation Of Microleakage Of Rsa Roekoseal Automix Root Canal Sealer, Neil Thomas Miller May 2001

Evaluation Of Microleakage Of Rsa Roekoseal Automix Root Canal Sealer, Neil Thomas Miller

Graduate Theses, Dissertations, and Problem Reports (ETD)

The sealing ability of RSA Roekoseal Automix root canal sealer using ThermaFil Plus and cold lateral condensation was compared to Roth's 801 root canal sealer. Fifty-two single canaled roots of extracted teeth were divided into four groups of twelve and instrumented to size 6 with .06 taper series 29 ProFiles. Group A canals were obturated with ThermaFil and Roth's 801 sealer. Group B canals were obturated with ThermaFil and RSA Roekoseal Automix. Group C canals were obturated with cold lateral condensation and Roth's 801 sealer. Group D canals were obturated with cold lateral condensation and RSA Roekoseal Automix. The linear …

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Identification, Localization And Metal-Catalyzed Induction Of Specific Metallothionein Isoforms Expressed By The Adult Human Lens, Brian Patrick Opperman May 2001

Identification, Localization And Metal-Catalyzed Induction Of Specific Metallothionein Isoforms Expressed By The Adult Human Lens, Brian Patrick Opperman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Purpose. Metallothioneins (MT s) are a large family of proteins involved in multiple protective pathways, including binding of toxic metals and oxidative stress. Previously we detected increased expression of MT IIA in age-related human cataractous lenses. As a first step towards defining the function of MTs in the lens, we sought to establish the expression patterns of those MT isoforms expressed by the adult human lens and identify those toxic heavy metal inducers of MT IIA. Conclusions. This data establishes the spectrum of MTs expressed by the human lens, defines their spatial expression patterns (mRNA and protein level) and establishes …

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Effects Of Type-I Collagen Fractional Composition And Pyridinium Crosslink Content On Cortical Bone Strength In The Human Femur, Michael Blair Rice May 2001

Effects Of Type-I Collagen Fractional Composition And Pyridinium Crosslink Content On Cortical Bone Strength In The Human Femur, Michael Blair Rice

Graduate Theses, Dissertations, and Problem Reports (ETD)

Type-I collagen's role in the formation of bone and its inherent strength have been well documented by studies in genetic diseases such as Osteogenesis Imperfecta. Type-I collagen's role in healthy bone, and the changes that occur to collagen during aging, which may eventually lead to osteoporosis, is less understood. Changes that may occur include differences in collagen production and in its processing such as differences in glycosylation and the hydroxylation of specific amino acid residues. Changes in the reducible and non-reducible crosslink content, or changes in the ratio of crosslinks to total collagen may also occur. The present study investigated …

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Effects Of Three Clipping Managements On Growth And Production Of A Kentucky Bluegrass-Clover Sward, Beverly Ellen Sedon May 2001

Effects Of Three Clipping Managements On Growth And Production Of A Kentucky Bluegrass-Clover Sward, Beverly Ellen Sedon

Graduate Theses, Dissertations, and Problem Reports (ETD)

The effect of three clipping managements on the growth and production of Kentucky bluegrass was investigated at the West Virginia University Livestock Farm. Herbage accumulation, botanical composition, leaf extension rate (LER), leaf appearance rate (LAR), and tiller density were observed. The sward was clipped to three heights, 2.5, 5.1, and 7.6 cm, from a recovery growth of 13 to 15 cm. Nitrogen was applied in split applications twice a year at three rates (0, 80, and 160 kg N ha-1). Herbage accumulation and growth rates were higher in 2000 than 1999. Rainfall was higher in 2000 than in 1999. Low …

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Valuation Of Electric Utility Generating Assets In A Competitive Environment, Mary Barbara Cain May 2001

Valuation Of Electric Utility Generating Assets In A Competitive Environment, Mary Barbara Cain

Graduate Theses, Dissertations, and Problem Reports (ETD)

Electricity industry restructuring, technological advances, and changing environmental laws and regulations are providing opportunities for many electricity companies to substantially lower their cost of doing business. One such cost is property tax, which in a majority of states is based upon the fair market value of property. Traditionally, assets of a regulated utility were valued at fair market value based upon the regulated price of electricity or "rate base". Valuation methods such as the income approach, replacement cost approach, comparable sales approach, and the stock and debt approach are common assessment methods for property tax (ad valorem) purposes. The appropriateness …

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Induction Of Fertile Estrus During Seasonal Anestrus In Ewes And Fall Born Ewe Lambs, Marlon Knights May 2001

Induction Of Fertile Estrus During Seasonal Anestrus In Ewes And Fall Born Ewe Lambs, Marlon Knights

Graduate Theses, Dissertations, and Problem Reports (ETD)

The quantity of progesterone (P4) delivered by a new P 4 releasing intravaginal insert (polycapralactone [PCL] insert), was inadequate to increase serum concentrations of P4 to that observed in cycling ewes during the luteal phase. Percentage of ewes in estrus was greater in P4 treated than in control ewes. Estrous response was greater after treatment with P4 for 5 than for 12 d. Progesterone increased the percentage of ewes lambing to both service periods by 20 percentage points. Prolificacy to the first service period in ewes treated with FSH was greater than the prolificacy in control and all ewes lambing …

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