Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Graduate Theses, Dissertations, and Problem Reports (ETD)

Discipline
Keyword
Publication Year
File Type

Articles 6901 - 6930 of 7646

Full-Text Articles in Entire DC Network

Characterization Of Particulate Matter And Hydrocarbon Emissions From In-Use Heavy-Duty Diesel Engines, Aleksandar Djordje Bugarski Dec 1999

Characterization Of Particulate Matter And Hydrocarbon Emissions From In-Use Heavy-Duty Diesel Engines, Aleksandar Djordje Bugarski

Graduate Theses, Dissertations, and Problem Reports (ETD)

A continued increase in the use of diesel engines in heavy-duty vehicles, and the uncertainties about the effects of the emissions on human health have focused attention on risk assessments of exposure to the diesel exhaust. The characterization of diesel particulate matter (PM) and hydrocarbon (HC) emissions is the primary objective toward assessing potential health hazard. The dependence of DPM nature on engine/vehicle operating conditions, fuel type, different after treatment processes, and measurement process on the size resolved PM emissions was examined by operating the test engines and vehicles under steady-state and transient conditions. The regional deposition of DPM in …

Go to article

Potential Lethal And Sublethal Effects Of Gypsy Moth Biological Treatments On Non-Target Lepidopterans In Two Appalachian Forests, Kenneth Edward Rastall Dec 1999

Potential Lethal And Sublethal Effects Of Gypsy Moth Biological Treatments On Non-Target Lepidopterans In Two Appalachian Forests, Kenneth Edward Rastall

Graduate Theses, Dissertations, and Problem Reports (ETD)

Eighteen 200 ha plots were established in the Monongahela National Forest (MON), Pocahontas County, West Virginia, and in the George Washington National Forest (GW), Augusta County, Virginia. From 1995 through 1998 black light traps, foliage pruning, and canvas bands were used to collect macrolepidopteran adults and larvae. During 1997 and 1998, 6 plots each were aerially treated with nucleopolyhedrosis virus (Gypchek(TM); GC) and Bacillus thuringiensis var. kurstaki (Btk: Bt). The remaining 6 plots were left untreated (Ref). Leaf samples from Bt plots were analyzed for toxin concentrations using enzyme-linked immunosorbant assay techniques. Results indicated concentrations above 20 ng/cm2 for 90.1% …

Go to article

Experimental Characterization Of Heat Transfer From An Electrically Heated Thin Filament, Amy J. Cragg Dec 1999

Experimental Characterization Of Heat Transfer From An Electrically Heated Thin Filament, Amy J. Cragg

Graduate Theses, Dissertations, and Problem Reports (ETD)

Thin filaments for use in glass, polymer, or textile industries are formed by extruding molten material through an orifice to form a continuous filament. These filaments are cooled rapidly from the melting temperature of the material to near room temperature. If this cooling occurs too rapidly or too slowly imperfections can develop in the filaments. These imperfections can decrease the overall quality and strength of the fiber sometimes leading to temporary production shutdowns caused by filament breakage.;Driven by the need to understand and control the cooling of thin filaments, research has been conducted to attempt to experimentally characterize the heat …

Go to article

Experimental Investigation Of Ion Temperature Anisotropy Driven Instabilities In A High Beta Plasma, Paul Arthur Keiter Dec 1999

Experimental Investigation Of Ion Temperature Anisotropy Driven Instabilities In A High Beta Plasma, Paul Arthur Keiter

Graduate Theses, Dissertations, and Problem Reports (ETD)

The first measurements of an ion temperature anisotropy/beta inverse correlation in a high beta laboratory experiment are presented. The observation of this correlation is similar to such a correlation present in in-situ spacecraft measurements and predicted in theory. Low-frequency fluctuations are also observed. According to measurements presented here, these waves are electromagnetic, transverse, occur at frequencies below the cyclotron frequency and have wavenumbers consistent with predictions for the ion cyclotron anisotropy instability, also referred to as the Alfven Ion-Cyclotron instability. The device is a space simulation chamber that uses a helicon source for its plasma source. Ranges of ion beta …

Go to article

Identification Of The Function Of The Carboxy Terminus Of Afap-110 In Regulating Afap-110'S Self-Association, Cell Localization And The Integrity Of Actin Filaments, Yong Qian Dec 1999

Identification Of The Function Of The Carboxy Terminus Of Afap-110 In Regulating Afap-110'S Self-Association, Cell Localization And The Integrity Of Actin Filaments, Yong Qian

Graduate Theses, Dissertations, and Problem Reports (ETD)

The actin filament associated protein of 110 kDa (AFAP-110) is a SH2/SH3 binding partner for Src. It has two SH2 binding motifs, one SH3 binding motif, one proline rich motif, two PH domains and one serine/threonine substrate region at its amino terminus and has been hypothesized to function as an adapter protein that mediate the effects of different signal proteins upon actin filaments. In this report, we demonstrated: (1) AFAP-110 has the ability to self-associate through carboxy terminal interactions. Analysis of the carboxy terminus of AFAP-110 reveals a leucine zipper motif. Expression of carboxy terminus as a fusion protein (GST-cterm) …

Go to article

Efficient And Flexible Algorithm For Plant Layout Generation, Li Weng Dec 1999

Efficient And Flexible Algorithm For Plant Layout Generation, Li Weng

Graduate Theses, Dissertations, and Problem Reports (ETD)

A facilities layout, also called plant layout, consists of the production areas, production related or support areas and personnel areas within the building. Plant layout design is one of the strategic fields that determine the long run efficiency of operation.;This dissertation proposes an efficient and flexible plant layout algorithm to minimize the material handling cost and deal with change in future. A material flow forecasting tool, a scheduling module related to layout design and an evaluation method of flexible layouts are also proposed by this dissertation. A computer-based system will be developed to integrate all of the functions.;The first chapter …

Go to article

Stability Studies Of Coal Liquid Products Using High Performance Liquid Chromatography, Lawrence P. Norcio Dec 1999

Stability Studies Of Coal Liquid Products Using High Performance Liquid Chromatography, Lawrence P. Norcio

Graduate Theses, Dissertations, and Problem Reports (ETD)

The storage stability of coal liquids is of great importance if coal liquefaction products are to replace petroleum products. It has been reported that gum formation occurs in coal-derived liquids during storage to a level at which it becomes a handling problem. The aging of coal hydropyrolysis liquids has been studied. Coal liquid products were placed in preweighed sample vials and stored under light, in the presence of air, at different storage temperatures (2, 21, and 32°C). The weight of gum formed was determined at specified sampling times. High performance liquid chromatography (HPLC) was used to monitor the changes in …

Go to article

Milk Allergy/Intolerance In Infancy And Cognitive Functioning, Tina M. Yost Dec 1999

Milk Allergy/Intolerance In Infancy And Cognitive Functioning, Tina M. Yost

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examines the relationship between a history of milk A/I in infancy and intelligence in later childhood. Participants included 74 male and female children ages 3 years to 12 years, referred for psychological evaluation. Background information gathered from the primary caregiver included history of milk A/I in infancy. The Wechsler Scales of Intelligence provided information on the participants level of cognitive functioning. Findings were significant for both ANOVA and chi square analysis, with children in Group One (milk A/I) demonstrating lower IQ scores than children in Group Two (no milk A/I). The findings also suggest a relationship between milk …

Go to article

Encapsulation Of Particles Using Brittle Coatings For Subterranean Applications, Aashish L. Bhatia Dec 1999

Encapsulation Of Particles Using Brittle Coatings For Subterranean Applications, Aashish L. Bhatia

Graduate Theses, Dissertations, and Problem Reports (ETD)

The production of a brittle and moisture-resistant coating for particles, which reduce or "break" the viscosity of fracturing fluids, was explored.;The viscosity-reducer was ammonium persulfate. Polyurethane and acrylate coatings were investigated. The coated particles were assessed for dissolution in water before and after being subjected to a compression test. Polyurethane-coated particles had a high leach prior to compression and were considered unsuitable. Acrylate coatings gave much better results. The addition of significant quantities of silica in the coat increased significantly its brittleness. The acrylate formed agglomerates during the coating process. These were easier to break than single particles. These agglomerates …

Go to article

Determination Of Vitality From A Non-Invasive Biomedical Measurement For Use In Integrated Biometric Devices, Reza Derakhshani Dec 1999

Determination Of Vitality From A Non-Invasive Biomedical Measurement For Use In Integrated Biometric Devices, Reza Derakhshani

Graduate Theses, Dissertations, and Problem Reports (ETD)

Personal identification is a very important issue in today's mobile and electronically networked societies. Among the available measures, fingerprints are the oldest and most widely used. Unfortunately, it is usually possible to deceive automatic fingerprint identification systems by presenting a well-duplicated synthetic or dismembered finger. This project is one method to provide fingerprint vitality authentication in order to solve this problem. Using a sensor that is composed of an array of capacitors, this method identifies the vitality of a fingerprint by detecting a specific changing pattern over the human skin. Mapping the two-dimensional images into one-dimensional signals, two ensembles of …

Go to article

Data Mining Oipea Database For Waste And Productivity Enhancements In Manufacturing Units, Jaison John Ipe Dec 1999

Data Mining Oipea Database For Waste And Productivity Enhancements In Manufacturing Units, Jaison John Ipe

Graduate Theses, Dissertations, and Problem Reports (ETD)

Small and medium-sized manufacturing plants (those with fewer than 500 employees) represent more than 98 percent of the more than 374,000 establishments in the U.S. manufacturing industry, 64 percent of employees in the total manufacturing labor force, and more than 42 percent of total manufacturing energy consumption.;In 1976 the federal government started funding industrial energy audits for small and medium sized manufacturing firms under the auspices of the Industrial Assessment Centers (IAC) that are spread throughout the U.S. The data collected from the hundreds of energy audits that are conducted each year is collected in a database maintained by the …

Go to article

Probability Analysis Of Slope Stability, Jennifer Lynn Peterson Dec 1999

Probability Analysis Of Slope Stability, Jennifer Lynn Peterson

Graduate Theses, Dissertations, and Problem Reports (ETD)

The ability of geotechnical engineers to accurately model slope performance is compromised by a variety of factors. The net result of these considerations is that the exact behavior of slopes cannot be accurately predicted. Hence, geotechnical engineers resort to a factor of safety approach to reduce the risk of slope failure. However, the factor of safety approach cannot quantify the probability of failure, or level of risk, associated with a particular design situation.;A probabilistic approach to studying geotechnical issues offers a systematic way to treat uncertainties, especially slope stability. In terms of probability, uncertainties can be related quantitatively to the …

Go to article

Design And Development Of Fuzzy Expert System For Handy Board, Aditya Kumar Singh Dec 1999

Design And Development Of Fuzzy Expert System For Handy Board, Aditya Kumar Singh

Graduate Theses, Dissertations, and Problem Reports (ETD)

The recent trend in global manufacturing scenario has resulted in the emergence of many innovative techniques that have revolutionized the manufacturing industry as a whole. A lot of states of art advances have been associated with the increasing use of microprocessors in advance manufacturing systems. Out of many the one, which has predominantly captured the real time, behavioral use is the Fuzzy Logic.;Fuzzy logic implementation in real time environment involves the integration of multi-disciplinary area like computer engineering, mechanical and electronic systems tailored towards smart systems that enable a very precise control on the process. The fuzzy logic based project …

Go to article

Design And Development Of A Microwave-Enhanced Diesel Soot Oxidation System, Bret Allen Rankin Dec 1999

Design And Development Of A Microwave-Enhanced Diesel Soot Oxidation System, Bret Allen Rankin

Graduate Theses, Dissertations, and Problem Reports (ETD)

Diesel particulate matter (PM) emissions have created considerable concern because PM is a suspected carcinogen. Up to this point, improved engine and fuel system design and control schemes have made the use of diesel particulate aftertreatment systems unnecessary for most applications in the United States, but the continued decreasing trend of emissions regulations may necessitate the use of PM filters for many applications.;Many methods have been developed to generate a controlled, reliable regeneration event within PM filters, none of which have been proven to be completely successful. These methods include exhaust throttling, fuel catalysis, filter catalysis, electrical heating, and burner …

Go to article

Bending Behavior Of Concrete T-Beams Reinforced With Glass Fiber-Reinforced Polymer (Gfrp) Bars, Rajesh Kumar Kalluri Dec 1999

Bending Behavior Of Concrete T-Beams Reinforced With Glass Fiber-Reinforced Polymer (Gfrp) Bars, Rajesh Kumar Kalluri

Graduate Theses, Dissertations, and Problem Reports (ETD)

Concrete slabs are integrally cast with girders or stringers (stiffening system) resulting in floor slabs, bridge decks, footers, retaining structures and others. A portion of slab between a stiffening system acts as flange and bends in unison with the stiffening system, i.e., classic T-beam action. The emphasis of this study is to determine the effective flange width, failure modes, deformability factors, pre- and post-cracking deflections and crack widths at first crack and at ultimate failure of T-beams.;Eight concrete T-beams with two different flange widths and two reinforcement configurations were tested under four point bending to study the factors cited above. …

Go to article

Molecular Dynamics Simulation Study Of The Stability And Conformation Of Spin-Probe Labeled Dnas, Eva Darian Dec 1999

Molecular Dynamics Simulation Study Of The Stability And Conformation Of Spin-Probe Labeled Dnas, Eva Darian

Graduate Theses, Dissertations, and Problem Reports (ETD)

Nitroxide based spin-probes, observable by ESR, have been used to study protein structure and protein-substrate interactions. More recently, spin-probe labeled DNAs have been introduced to study its structure and dynamics. Molecular modeling has proven to be an increasingly powerful tool for studying structure and dynamics of biologically interesting, molecules. As part of our work, we have conducted molecular dynamics simulations on both double-stranded (ds) and triple-stranded or triplex (tx) spin-probe labeled DNAs for comparison with unmodified ones and to design new probes. Nitroxide spin-labeled analogue of thymidine in which the methyl group is replaced by an acetylene-tethered nitroxide (T*) was …

Go to article

Physiological And Genetic Mechanism(S) Of Cold Acclimation In Rhododendron, Chon Chong Lim Dec 1999

Physiological And Genetic Mechanism(S) Of Cold Acclimation In Rhododendron, Chon Chong Lim

Graduate Theses, Dissertations, and Problem Reports (ETD)

An in vitro laboratory protocol for assessing cold hardiness (CH) in rhododendrons based on electrolyte-leakage was developed. The raw leakage data were transformed into percent-adjusted injury, which showed high correlation with injury data based on visual observations. The percent-adjusted injury data---fitted to the Gompertz function coupled with the Jackknife method---allowed for reliable and statistically sound estimations of Rhododendron leaf freezing-tolerance (LFT). Utilizing this method, Tmax values for Rhododendron cultivars, species, and populations were determined and ranked relatively. Our observation of a continuous distribution of LFT in F2 and backcross (BC) populations derived from a R. catawbiense x R. fortunei cross …

Go to article

Performance Evaluation Of Exhaust Aftertreatment Devices Used For Emissions Control On Diesel Engines Employed In Underground Coal Mines, Daniel K. Carder Dec 1999

Performance Evaluation Of Exhaust Aftertreatment Devices Used For Emissions Control On Diesel Engines Employed In Underground Coal Mines, Daniel K. Carder

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was initiated to assist the WV Diesel Equipment Commission in its promulgation of initial rules, requirements, and standards governing the operation of diesel-powered equipment in underground coal mines. Four different engines and various exhaust after treatment devices that represent current levels of in-use technology were selected for performance evaluation. Both eddy-current and water-brake dynamometers were used to load the engines according to an ISO 8-Mode test cycle. Experimental emissions data, sampled from a full-flow dilution tunnel, suggests that particulate traps can reduce the mass emission rates of particulate matter (DPM) by nearly 90%, while reductions in fuel sulfur …

Go to article

Decision Support Tool For Costing Of The Pultrusion Process, Taher Badrudin Patrawala Dec 1999

Decision Support Tool For Costing Of The Pultrusion Process, Taher Badrudin Patrawala

Graduate Theses, Dissertations, and Problem Reports (ETD)

The use of advanced composites has grown over the last two decades. These high strength, low weight materials can now be found in many structural applications, including bridges. However, the substitution of plastics for conventional materials, such as steel, is governed by engineering constraints and cost competitiveness. A brief discussion of the process variables and engineering constraints is presented in the first chapter. To analyze the latter and to identify cost centers in production more readily, a computerized cost model was developed. This model estimates the cost of producing components by the pultrusion process.;The technical cost modeling methodology employed involves …

Go to article

Evaluation Of Ceramic Candle Filters Degradation And Damage Location Using Four-Point Bending Tests, Wu Tseng Peng Dec 1999

Evaluation Of Ceramic Candle Filters Degradation And Damage Location Using Four-Point Bending Tests, Wu Tseng Peng

Graduate Theses, Dissertations, and Problem Reports (ETD)

The structural integrity of ceramic candle filters is a key element for hot gas cleanup systems. Ceramic candle filters used in demonstration plants have experienced degradation and fracturing. Preliminary examination of these ceramic filters indicated that damage of the filters may have resulted from strength degradation due to persistent high temperature operation, thermal transient events, excessive ash accumulation and bridging, and pulse cleaning. This study proposes a nondestructive evaluation of the structural properties of these ceramic filters. The ceramic candle filter is a slender structure made of layers of porous materials. The structure has high acoustic attenuation, which has greatly …

Go to article

Explaining Age-Related Problem -Solving Differences On Concept Identification Problems As A Function Of Problem Content, Strategies, And Stereotypes, Dave Buck Dec 1999

Explaining Age-Related Problem -Solving Differences On Concept Identification Problems As A Function Of Problem Content, Strategies, And Stereotypes, Dave Buck

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purposes of this study were to: (a) determine whether older adults would use logic-based strategies on a concept identification task when the stereotyped content of the task was changed to "experience free"; (b) determine whether older adults would use logic-based strategies when the stereotyped content was left intact after completing an "experience free" version of the concept identification task, and (c) explore relations of potential causal mechanisms of strategy use for older adults such as problem interpretation or past experience. Thirty-two older adults (M = 70.0 years) and 32 younger adults (M = 21.2) solved two versions of the …

Go to article

Java Challenge Software Project, Karuna Annavajjala Dec 1999

Java Challenge Software Project, Karuna Annavajjala

Graduate Theses, Dissertations, and Problem Reports (ETD)

Programming contests are a means of exploiting the problem solving capabilities of developers and they provide a forum for display of extraordinary programming skills. The Java Challenge (JC) Software Project is the saga of creating an automated, secure and responsive programming contest system for deployment on the Internet and to collect information about programming practices, habits, and trends in coding in such restricted environment. The methodology followed to design, implement, and evaluate such a system uses new technologies such as the WWW, mail filtering and sandboxing techniques. The current Java Challenge implementation runs the Java Challenge on a Solaris 2.6 …

Go to article

Causes And Consequences Of The 1909--1910 Steel Strike In The Wheeling District, Louis Charles Martin Dec 1999

Causes And Consequences Of The 1909--1910 Steel Strike In The Wheeling District, Louis Charles Martin

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis is a study of the failure of trade unionism in the Wheeling District mills in the early twentieth century, a district whose unions had previously enjoyed great success. The conversion to tin plate in the district was, at first, beneficial to the skilled workers in the union, but with the combination of companies culminating in the creation of the United States Steel Corporation, the union could no longer count on the skill of its members for survival. Ultimately, Wheeling steelworkers were victims of the modernization of the steel industry and a union that would not adopt industrial unionism …

Go to article

Design Of Anechoic Chamber Instrumentation And Data Acquisition Module For Testing And Analysis Of The Ctha, Srikanth Gururajan Aug 1999

Design Of Anechoic Chamber Instrumentation And Data Acquisition Module For Testing And Analysis Of The Ctha, Srikanth Gururajan

Graduate Theses, Dissertations, and Problem Reports (ETD)

The backbone of wireless communication is an antenna, a device that converts electromagnetic energy to electric energy and vice versa, to transmit and receive the signals. The effectiveness of a communication system depends largely on the effectiveness of the antenna used in them. The effectiveness of an antenna is characterized by its electromagnetic field. Methods to characterize the field of an antenna include testing them on outdoor test ranges or in enclosures insulated against electromagnetic radiation, called anechoic chambers. The objective of this work is to design and build an automated data acquisition system to map the field of physically …

Go to article

Through-Wafer Interrogation Of Mems Device Motion, Jeremy Michael Dawson Aug 1999

Through-Wafer Interrogation Of Mems Device Motion, Jeremy Michael Dawson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Microelectromechanical systems (MEMS) have been the focus of many research groups because of their wide variety of uses in sensing and actuation applications. A fundamental barrier facing designers of next generation MEMS is the inability to access accurate, real-time microstructure positional information to determine if the device is performing as expected. Previously explored optical and electrical methods of MEMS device monitoring are often only suitable for research environments, or are unable to produce clear and meaningful characterization of device motion. The most desirable MEMS monitoring method would be one that could be implemented at the device level, which would allow …

Go to article

Forecasting Of Work In Process Quality Using Holt-Winters Method For Missing Observations, Sarang Ram Kayande Aug 1999

Forecasting Of Work In Process Quality Using Holt-Winters Method For Missing Observations, Sarang Ram Kayande

Graduate Theses, Dissertations, and Problem Reports (ETD)

Since the pace of technological change is so great, and since new products and processes may be key to a company's future plans, an increasing number of companies are emphasizing regular and complete technological forecasts affecting their industry. Those companies which have gone far in developing planning premises from their technological forecasts have tended to be high-technology enterprises. What has been done in these instances is to encourage members of their technical staffs to be alert to future developments; to think in terms of the impact of current scientific developments on the future state of technology; and to develop orderly …

Go to article

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.

Go to article

Durability And Mode-I Fracture Of Fiber-Reinforced Plastic (Frp)/Wood Interface Bond, Brent Stephen Trimble Aug 1999

Durability And Mode-I Fracture Of Fiber-Reinforced Plastic (Frp)/Wood Interface Bond, Brent Stephen Trimble

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fiber-reinforced plastic (FRP) composites are being used for reinforcement of wood, concrete, and steel. The objective of this study is to develop a qualification program to evaluate the service performance and fracture of composite/wood bonded interfaces. The proposed method is used for two types of FRP wood interface: FRP strips (plates) bonded to wood (used commercially for glulam timber beams) and wood cores wrapped with FRP by filament winding (being investigated for reinforced railroad wood crossties and utility wood poles). First, the service performance and durability of FRP-wood interface bond is evaluated using a modified ASTM delamination test. Second, the …

Go to article

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 …

Go to article

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 …

Go to article

First Prev Next Last