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

Digital Commons Network™

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

West Virginia University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 2881 - 2910 of 4525

Full-Text Articles in Entire DC Network

Insights From The Field: Perceptions Of In-Home Interventionists Working In Appalachian Maryland., Benjamin T. Brauer Jan 2008

Insights From The Field: Perceptions Of In-Home Interventionists Working In Appalachian Maryland., Benjamin T. Brauer

Graduate Theses, Dissertations, and Problem Reports (ETD)

As No Child Left Behind continues to impact public K-12 education, educators continue to seek new ways in which to reach out to at-risk students. Many school administrators and school interventionists are using in-home interventions to assist families in facilitating their child’s success. These interventions range from simply bringing instructional materials to the home of a frequently absent student, to facilitating the delivery of mental health services in the home. While school officials are taking on additional roles and responsibilities to try and meet the growing expectations placed on the public K-12 educational system, many feel that they are doing …

Go to article

Kepler's Method: The Conjoining Of Theoretical And Empirical Science., Marc M. Mezzina Jan 2008

Kepler's Method: The Conjoining Of Theoretical And Empirical Science., Marc M. Mezzina

Graduate Theses, Dissertations, and Problem Reports (ETD)

Johannes Kepler was a mathematician that changed the way that science was conceived and practiced in the early seventeenth century. Kepler’s method of scientific inquiry consisted of the joining of the theoretical aspects of astronomy with the solid empirical proof provided by observations. Kepler’s method would lead him to the discovery of his three laws of planetary motion, as well as change the fundamental questions asked by the subject of astronomy. This is a look in the method employed by Kepler throughout his most significant scientific works.

Go to article

The Effects Of Residual Baylage Leachate On The Germination And Growth Of Orchardgrass (Dactylis Glomerata L.) And Red Clover (Trifolium Pratense L.)., Sheena R. Moore Jan 2008

The Effects Of Residual Baylage Leachate On The Germination And Growth Of Orchardgrass (Dactylis Glomerata L.) And Red Clover (Trifolium Pratense L.)., Sheena R. Moore

Graduate Theses, Dissertations, and Problem Reports (ETD)

In early spring, areas of soil directly under baylage, spread for winter consumption by steers, is void of vegetation even after reseeding. This study was conducted to determine if: 1) residual baylage leachate is allelopathic to orchardgrass and red clover, 2) soil microorganisms have an effect on the toxicity of the leachate, and 3) toxicity decreases over time. Petri dishes, as well as potted soil/sand mixtures, were used to test for allelopathy. Leachate reduced seed germination and seedling length as compared to distilled water. There is evidence that soil microorganisms did not affect leachate toxicity. Toxicity of leachate to both …

Go to article

From Human To Robot And Back Again: The Process Of Rehearsing And Performing Jacie Tripplethree In Alan Ayckbourn's "Comic Potential"., Denice R. Burbach Jan 2008

From Human To Robot And Back Again: The Process Of Rehearsing And Performing Jacie Tripplethree In Alan Ayckbourn's "Comic Potential"., Denice R. Burbach

Graduate Theses, Dissertations, and Problem Reports (ETD)

The control of physical and vocal characteristics of Jacie Tripplethree in Alan Ayckbourn’s Comic Potential seemed imperative to the demands and success of the role. While important, the more difficult the task is, the simpler the approach through the process of research, rehearsal, and performance should be. E.C. Zeeman said, “Technical skill is mastery of complexity while creativity is mastery of simplicity.” In the midst of this modern farce I have found the simplicity of mere presence on stage and explored some of the history of comedy, women in comedy, and the invention of the android…and experienced the excitement and …

Go to article

Delay Discounting In Adolescent Substance Abuse And Juvenile Delinquency: A Comparison Of Measures Of Impulsive Behavior., Eric S. Grady Jan 2008

Delay Discounting In Adolescent Substance Abuse And Juvenile Delinquency: A Comparison Of Measures Of Impulsive Behavior., Eric S. Grady

Graduate Theses, Dissertations, and Problem Reports (ETD)

Recent research in the areas of substance use and juvenile delinquency has revealed that impulsivity is a multi-dimensional construct. Additionally, researchers have expressed the need for more objective, behavioral measures of impulsive behavior. This study was conducted to examine how a delay-discounting procedure, continuous performance test and questionnaire-based measures of impulsivity relate to substance use and delinquent behavior. The sample was comprised of 42 adolescents (35 male) residing in an inpatient treatment facility for alcohol and substance use. The hyperbolic discounting function did not provide a good fit to the delay-discounting data. As such, the area under the curve (AUC) …

Go to article

A Comparison Of Bacterial Adherence On Standard Orthodontic Brackets And Titanium Miniscrew Implants: An In Vivo And In Vitro Study., Lindsay Jackfert Jan 2008

A Comparison Of Bacterial Adherence On Standard Orthodontic Brackets And Titanium Miniscrew Implants: An In Vivo And In Vitro Study., Lindsay Jackfert

Graduate Theses, Dissertations, and Problem Reports (ETD)

Fixed orthodontic appliances including standard brackets and titanium minscrews have the ability to introduce mechanical plaque (biofilm) traps. These orthodontic appliances impair plaque removal, proper oral hygiene, and gingival health11. The purpose of this study is to determine the bacterial accumulation and subsequent biofilm formation on miniscrews and compare it to that of metal orthodontic brackets, in vivo and in-vitro. Plaque samples were taken from the orthodontic brackets and miniscrews in-vivo. S. mutans, Lactobacillus casei, and P. gingivalis were cultured from these samples. In-vitro, a unique experimental set-up was created in the laboratory. Metal brackets and titanium miniscrew implants were …

Go to article

The Effect Of Genotype, Choice-Feeding And Season On Organically-Reared Broilers Fed Diets Devoid Of Synthetic Methionine., Amanda L. Rack Jan 2008

The Effect Of Genotype, Choice-Feeding And Season On Organically-Reared Broilers Fed Diets Devoid Of Synthetic Methionine., Amanda L. Rack

Graduate Theses, Dissertations, and Problem Reports (ETD)

In light of the impending ban on synthetic methionine in organic poultry diets, researchers have focused on finding alternative strategies to supply this amino acid. The objectives of this study were to assess performance and carcass characteristics of broilers fed diets devoid of synthetic methionine using 1) a slow-growing and fast-growing genotype, 2) choice-feeding management, and 3) pasture access and seasonal variation. Inclusion of fish meal and high percentages of soybean meal enabled the specific genotype methionine requirement to be met. All diets were certified organic. Slowgrowing broilers (Gourmet Black) were raised from 1-84 days, and fast-growing broilers (Cobb 500) …

Go to article

West Virginia Agricultural Education Teachers' Perceptions On Involving Students With Exceptionalities In Agricultural Classrooms And Laboratories., Ashley D. Watts Jan 2008

West Virginia Agricultural Education Teachers' Perceptions On Involving Students With Exceptionalities In Agricultural Classrooms And Laboratories., Ashley D. Watts

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to examine West Virginia Agricultural Education Teachers perceptions on involving students with exceptionalities in agricultural classrooms and laboratories. This study examined whether teachers felt confident, well-prepared, and if other students interact well with students with exceptionalities. This study also sought to determine if agricultural teachers felt they had adequate training to work with students with exceptionalities or if additional training was needed. The majority of teachers agreed that including students with exceptionalities in the classroom fosters understanding for diverse populations. A majority of teachers have seen an increase in students with exceptionalities in their …

Go to article

Cultural Assimilation, Appropriation And Commercialization: Authenticity In Rap Music, 1997-2004., Jonathan P. Tummons Jan 2008

Cultural Assimilation, Appropriation And Commercialization: Authenticity In Rap Music, 1997-2004., Jonathan P. Tummons

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis examines the changes in authenticity in rap lyrics between 1997 and 2004. Throughout its American history, Black music has expressed the lived experiences, the psychological realities, of Africans in diaspora and has always functioned to help create, negotiate and maintain cultural identity or “Blackness”. Within the last 20 years, rap music has undergone a tremendous amount of commercialization and appropriation by capitalistic culture industries and their largely white consumer base which has resulted in the widespread assimilation of black cultural expression into popular (white) culture. Rap artists increasingly invoke their authenticity as a way of preserving their cultural …

Go to article

(Trans)Forming Belief, Transforming Desire: An Analysis Of Conversion And Belief In Contemporary American Fiction., Anthony Zias Jan 2008

(Trans)Forming Belief, Transforming Desire: An Analysis Of Conversion And Belief In Contemporary American Fiction., Anthony Zias

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation locates a problem in poststructuralism's approach to the concept of believing. Since poststructuralism establishes itself as an intellectual inquiry that deconstructs not only particular beliefs but also the act of believing, many poststructuralists overlook the fact that their own philosophical premises must be initially believed before their critical interventions gain credence. These critics do not explain how belief, as such, emerges within people or why people adopt one belief system over another. To address this aporia, this dissertation reviews both Jacques Derrida's conceptualization of the decision as a choice divorced from rational calculation of evidence and J.F. Lyotard's …

Go to article

The Use Of English Determiners In Dialogue Journals By Japanese Second Language Learners, Adriana Rodrigues Bridger Jan 2008

The Use Of English Determiners In Dialogue Journals By Japanese Second Language Learners, Adriana Rodrigues Bridger

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to describe the use of English determiners in dialogue journals by Japanese second language learners. The entries of the journals of six Japanese students in an ESL class collected over an eight-week period served as the main source of data for this research project. Three analyses wert! performed: the accuracy order of the articles (the. al an. and@). possessives. and other determiners: the accuracy order of predeterminers. central determiners. and postdeterminers: and an error analysis of the articles a/an. the. and the@ article. The following major findings emerged: the accuracy order of the English …

Go to article

The Relative Efficacy Of Three Procedures For Reducing Canine Responding., Megan E. Maxwell Jan 2008

The Relative Efficacy Of Three Procedures For Reducing Canine Responding., Megan E. Maxwell

Graduate Theses, Dissertations, and Problem Reports (ETD)

Three response reduction procedures commonly employed in applied behavior analysis are extinction, differential-reinforcement-of-other-behavior (DRO) schedules, and time-based schedules of event delivery such as the fixed-time (FT) schedule. Each of these three procedures holds promise for the amelioration of canine behavior problems, yet none has been studied systematically, alone or in comparison with other procedures, with domestic dogs. In this research, the buoy-touching responses of eleven dogs were shaped and maintained using edible reinforcers. Responding then was exposed either to extinction, a fixed or an escalating DRO schedule, or an FT schedule. Extinction reduced responding more rapidly than the escalating DRO …

Go to article

State Economic Policy And Development In Kenya: A Study Of African Entrepreneurship In Kisii Township And Its Environs, 1930-1978, Kennedy Mokaya Moindi Jan 2008

State Economic Policy And Development In Kenya: A Study Of African Entrepreneurship In Kisii Township And Its Environs, 1930-1978, Kennedy Mokaya Moindi

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study explores African initiatives in the small scale business sector within Kisii town and the larger region of Gusiiland in the period from 1930 to 1978. Despite the transition to a market economy with the onset of colonial rule at the end of 19th Century, African participation in trading activities within Kisii town and other market centers had remained minimal up to 1930. The slow integration of Gusiiland into mainstream colonial economic production before the 1930s was mainly attributed to its relative geographical isolation from major centers of economic production in Kenya together with the violent nature that characterized …

Go to article

Fibroblast Growth Factor -19: A Novel Factor That Inhibits Hepatic Fatty Acid Synthesis., Sushant Bhatnagar Jan 2008

Fibroblast Growth Factor -19: A Novel Factor That Inhibits Hepatic Fatty Acid Synthesis., Sushant Bhatnagar

Graduate Theses, Dissertations, and Problem Reports (ETD)

Previous studies have shown that administration of fibroblast growth factor-19 (FGF-19) reverses diabetes, hepatic steatosis, hyperlipidemia, and adipose accretion in animal models of obesity. To investigate the mechanism for this effect, we determined whether FGF-19 modulated hepatic fatty acid synthesis, a key process controlling glucose tolerance and triacylglycerol accumulation in liver, blood, and adipose tissue. Incubating primary hepatocyte cultures with recombinant FGF-19 suppressed the ability of insulin to stimulate fatty acid synthesis. This effect was associated with a reduction in the expression of lipogenic enzymes. FGF-19 also suppressed the insulin-induced expression of sterol regulatory element-binding protein-1c (SREBP-1c), a key transcriptional …

Go to article

The Role Of Id2 Phosphorylation At Serine 5 In C2c12 Myoblasts., David Christopher Butler Jan 2008

The Role Of Id2 Phosphorylation At Serine 5 In C2c12 Myoblasts., David Christopher Butler

Graduate Theses, Dissertations, and Problem Reports (ETD)

Inhibitor of differentiation protein-2 (Id2) is a dominant negative helix-loop-helix (HLH) protein, and a positive regulator of proliferation, in various cells. The N-terminal region of Id2 contains a consensus cdk2 phosphorylation sequence SPVR, which may be involved with the induction of apoptosis, at least in myeloid 32d.3 cells. However, the role of Id2 phosphorylation at serine 5 in skeletal muscle cells is unknown. The purpose of this dissertation was to determine if the phosphorylation of Id2 at serine 5 alters its cellular localization and role in apoptosis in C2C12 myoblasts. Overexpression of wild type Id2 decreased MyoD protein expression, which …

Go to article

A Genetic Variant Of The Adaptor Protein, Afap-110, Efficiently Activates C-Src Resulting In Podosome Formation., David A. Clump Jan 2008

A Genetic Variant Of The Adaptor Protein, Afap-110, Efficiently Activates C-Src Resulting In Podosome Formation., David A. Clump

Graduate Theses, Dissertations, and Problem Reports (ETD)

The actin filament associated protein of 110 kDA (AFAP-110) is a well-characterized protein composed of amino-terminal binding motifs that function upstream of a carboxy-terminal actin binding domain. In vitro studies demonstrate that the amino-terminal pleckstrin homology 1 (PH1) domain interacts with activated PKCα, relaying signals that activate Src family kinases via SH3 and SH2 binding. Serving as an adaptor protein, AFAP-110 relays signals that result in the assembly of motility structures. These findings could be of physiological as well pathological significance as AFAP-110 colocalizes with SFKs in the developing brain as well as in the glial-derived tumor, glioblastoma multiforme. More …

Go to article

Effects Of Aqui-S Exposure In 3 Species Of Fish From The Sacramento-San Joaquin Delta, California., Melody Danley Jan 2008

Effects Of Aqui-S Exposure In 3 Species Of Fish From The Sacramento-San Joaquin Delta, California., Melody Danley

Graduate Theses, Dissertations, and Problem Reports (ETD)

There is need for an anesthetic to sedate fishes that does not require a mandatory post-exposure withdrawal period. Such an anesthetic could be used to sedate handled fishes as they are moved from tank to tank on the farm, surveyed in the wild, released from state and federal hatcheries, or harvested for human consumption. A proprietary form of clove oil, AQUI-S® , was recently submitted to the U.S. Food and Drug Administration for approval as a 0-day withdrawal anesthetic for use on aquatic organisms. As part of the approval process, a large series of efficacy and toxicity studies are required. …

Go to article

Response Rate Or Number Of Repetitions: Which Aspect Of Drill And Practice Testing Most Contributes To Paired-Associate Learning., Scott Davis Jan 2008

Response Rate Or Number Of Repetitions: Which Aspect Of Drill And Practice Testing Most Contributes To Paired-Associate Learning., Scott Davis

Graduate Theses, Dissertations, and Problem Reports (ETD)

Precision teaching methods began in the 1960s and have grown in utility and popularity over the last four decades (Downer, 2007). The methods are used to teach across multiple contents with an emphasis in achieving fluency as opposed to mere accuracy. Speed drills, frequently used to determine the learner's current level of fluency, were found to have a significant treatment effect on learning (McGreevy, 1978; Scott, Wolking, Stoutimore, & Harris, 1990; White & Haring, 1976). The purpose of this study is to isolate and measure the treatment effect of two key aspects of the speed drill and practice component of …

Go to article

Computerized Approaches To Enhance Understanding Of Organic Reaction Mechanisms: Can Reaction Mechanisms And Cplex Prelaboratory Methodology., Abdulrahman G. Al-Shammari Jan 2008

Computerized Approaches To Enhance Understanding Of Organic Reaction Mechanisms: Can Reaction Mechanisms And Cplex Prelaboratory Methodology., Abdulrahman G. Al-Shammari

Graduate Theses, Dissertations, and Problem Reports (ETD)

Two approaches to enhance the understanding of organic reaction mechanisms are described. First, a new method for teaching organic reaction mechanisms that can be used in a Computer-Assisted Instruction (CAI) environment is proposed and tested (Chapter 1). The method concentrates upon the important intermediate structures, which are assumed to be on the reaction coordinate, and which can be evaluated and graded by currently available computer techniques. At the same time, the “curved arrows” that show the electron flow in a reaction mechanism are neglected, since they cannot be evaluated and graded with currently available computer techniques. By allowing student practice …

Go to article

Alterations In Jak/Stat Signaling Pathway And Blood-Brain Barrier Function: Mechanisms Underlying Worsened Outcome Following Stroke In The Aged Rat., Vincent A. Dinapoli Jan 2008

Alterations In Jak/Stat Signaling Pathway And Blood-Brain Barrier Function: Mechanisms Underlying Worsened Outcome Following Stroke In The Aged Rat., Vincent A. Dinapoli

Graduate Theses, Dissertations, and Problem Reports (ETD)

Effective interventions and therapeutic strategies for stroke victims are few. Investigative focus on the discovery of neuroprotective drugs has drawn attention from gaining a deeper understanding of stroke pathophysiology and mechanisms underlying ultimate neuronal and functional loss. In this study we have described a method for improving the precision and accuracy of clot placement within the middle cerebral artery (MCA) of rats, creating thromboembolic method of occlusion relevant to the majority of strokes seen clinically and included the use of aged animals. We evaluated the pathologic and physiologic differences of stroke in young, adult and elderly female rats, demonstrating an …

Go to article

An Evaluation Of The Non-Target Effects Of Mosquito Control Pesticides On Uca Pugnax Physiology, Limb Regeneration And Molting Processes., Todd A. Stueckle Jan 2008

An Evaluation Of The Non-Target Effects Of Mosquito Control Pesticides On Uca Pugnax Physiology, Limb Regeneration And Molting Processes., Todd A. Stueckle

Graduate Theses, Dissertations, and Problem Reports (ETD)

Coastal and estuarine organisms face increasing multiple challenges unique to their environment which include natural and anthropogenic stressors that threaten their physiology, fitness, and population persistence. Synthetic pyrethroid and insect growth regulator pesticide use for agriculture, urban and municipal pest control are of increasing concern in coastal areas as other pesticide groups come under strict regulations and that they possess the potential to significantly impact aquatic resources. My research focuses on how current insecticide release in or near coastal marsh environments alter the physiology, limb regeneration and molting ability of a crustacean indicator species, Uca pugnax, in the intertidal and …

Go to article

Rhetorics Of Pain And Desire: The Writings Of The Middle English Mystics., Marisa A. Klages Jan 2008

Rhetorics Of Pain And Desire: The Writings Of The Middle English Mystics., Marisa A. Klages

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation, Rhetorics of Pain and Desire: The Writings of the Middle English Mystics, seeks to explore the connections between desire and pain in the writings of Richard Rolle, Julian of Norwich, Margery Kempe and Walter Hilton. All four writers develop a rhetoric that allows them to use pain and/or desire as a catalyst through which their writing becomes embodied. This embodied rhetoric serves the purpose of achieving union with God, while instructing others in the art of fusing the body, pain and desire into the ultimate conduit for divine contemplation. In each chapter, the development of each writer's authority …

Go to article

Functional Domains Of P450 1a1 And 1a2: Molecular Modeling-Guided Structure-Function Study., Youbin Tu Jan 2008

Functional Domains Of P450 1a1 And 1a2: Molecular Modeling-Guided Structure-Function Study., Youbin Tu

Graduate Theses, Dissertations, and Problem Reports (ETD)

Cytochromes P450 are a large family of heme-thiolate enzymes which metabolize a wide variety of both endogenous and xenobiotic compounds. Human P450 1A1 and 1A2 are two major members of the P450 1A subfamily. They share 72% sequence identity but display different specificities towards various substrates. In order to further understand the structure-function relationships of these enzymes, we have performed several molecular modeling-based studies that examined various functional domains of P450 1As. In the first part of this project, we have investigated the ligand binding domain by developing a specificity prediction model based on the correlations between MD (Molecular Dynamics)-based …

Go to article

"Divided Into Double Parts" Race, Gender, And The Double In Books 1-3 Of Spenser’S The Faerie Queene, Rachel N. Holmberg Jan 2008

"Divided Into Double Parts" Race, Gender, And The Double In Books 1-3 Of Spenser’S The Faerie Queene, Rachel N. Holmberg

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the first canto of Book 1 of Spenser's The Faerie Queene, Archimago divides Redcrosse and Una "into double parts," creating the impression that they are not just divided from each other, but divided from themselves. While this is the first time the phrase "divided into double parts" is mentioned, the theme of division and doubling has already appeared in the text. Indeed, this kind of thematic echo, or doubling, is characteristic of Spenser's work. My dissertation argues that only when we are seeing double, do we recognize the unity in The Faerie Queene . The concept of decomposition allows …

Go to article

Use Of Native Seed Mixtures To Improve Erosion Control And Wildlife Habitat On Log Landings Following Timber Harvest In The Upper Elk Watershed Of West Virginia, Lisa R. Tager Dec 2007

Use Of Native Seed Mixtures To Improve Erosion Control And Wildlife Habitat On Log Landings Following Timber Harvest In The Upper Elk Watershed Of West Virginia, Lisa R. Tager

Graduate Theses, Dissertations, and Problem Reports (ETD)

Foresters in West Virginia follow BMP guidelines by reseeding retired log landings with inexpensive grasses that quickly provide erosion control. However, these grasses typically are not native nor do they provide high quality forage for wildlife. I developed 3 native seed mixtures for log landing reclamation that would maintain sediment control, as well as enhance wildlife habitat. These mixtures included an erosion control mixture, a wildlife mixture, and a wildflower mixture. I assessed sediment control, biomass production, vegetation structure, forage quality, and small mammal usage of my native mixtures and a commonly used, nonnative traditional mixture in 2005 and 2006. …

Go to article

Expression Profiling Of Oocyte Specific Genes, Transcription Factors And Micrornas During Early Embryonic Development In Rainbow Trout (Onchorhyncus Mykiss), Raghuveer K. Ramachandra Dec 2007

Expression Profiling Of Oocyte Specific Genes, Transcription Factors And Micrornas During Early Embryonic Development In Rainbow Trout (Onchorhyncus Mykiss), Raghuveer K. Ramachandra

Graduate Theses, Dissertations, and Problem Reports (ETD)

Genes specifically expressed in oocytes are important for the development of oocytes and early embryos. By analyzing ESTs from a rainbow trout oocyte cDNA library, we identified a novel EST sequence that does not show homology to any sequences in the GenBank. Analysis of tissue distribution by RT-PCR revealed that this gene was only expressed in unfertilized oocytes. Sequencing of the EST clone identified a cDNA of 3163 bp. Northern blot analysis showed the novel gene has a single transcript of 3.4 kb. Additional 5' sequence was obtained by 5' RACE, extending the novel cDNA to 3333 bp. Analysis of …

Go to article

Modeling Sediment Movement In Forested Watersheds Using Hill-Slope Attributes, Gregory W. Hamons Dec 2007

Modeling Sediment Movement In Forested Watersheds Using Hill-Slope Attributes, Gregory W. Hamons

Graduate Theses, Dissertations, and Problem Reports (ETD)

The amount of sediment delivered to stream channels and the determination of the topographical attributes responsible for the origination and transfer of sediment were investigated in a central Appalachian mixed hardwood forest from 2002 through 2005. Two study watersheds were chosen within the Indian Run watershed in north central West Virginia. One remained undisturbed (control) and the other underwent road construction and tree harvesting operations (treatment). Sediment samples were collected from silt fences which were installed along both sides of the stream channels in both watersheds to ensure all sediment material delivered from adjacent hill-slopes was captured and collected. Sediment …

Go to article

Methods Of Season Extension For Market Gardeners, Natalie R. Bumgarner Dec 2007

Methods Of Season Extension For Market Gardeners, Natalie R. Bumgarner

Graduate Theses, Dissertations, and Problem Reports (ETD)

Season extension methods have been used in many climates and crops for centuries on all scales of vegetable production. Our research compared the effect of six season extension methods on soil and ambient temperatures and yields of warm and cool season vegetables in organic production. The methods under investigation in field plots were row cover, row cover with water tubes, low tunnel, low tunnel with water tubes, and a control for comparison, which were all replicated three times in field plots. The cold frame, and cold frame with water buffer treatments were replicated once in separate structures. Radishes, lettuce, peppers, …

Go to article

Synthetic Seed Production For Germplasm Storage Of Hydrastis Canadensis L. (Goldenseal), Satyaprakash R. Settipalli Dec 2007

Synthetic Seed Production For Germplasm Storage Of Hydrastis Canadensis L. (Goldenseal), Satyaprakash R. Settipalli

Graduate Theses, Dissertations, and Problem Reports (ETD)

Goldenseal (Hydrastis canadensis L.) is an important medicinal plant, native to Canada and Eastern United States, used as an antibiotic, anticonvulsant and in treatments for inflammations and dyspepsia. Over collection of wild population and native habitat destruction has lead the species to be listed as an endangered species in the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), Appendix II. This brought a revived interest in conservation of germplasm.;Calcium alginate solid and hollow bead encapsulation protocols were evaluated. Shoot and callus propagules were encapsulated in calcium alginate solid bead (supplemented with stage II nutrient media) …

Go to article

Reproductive Consequences Of Exposure To Sediment Extracts From The South Branch Of The Potomac River On Japanese Medaka (Oryzias Latipes), Seth R. Davis Dec 2007

Reproductive Consequences Of Exposure To Sediment Extracts From The South Branch Of The Potomac River On Japanese Medaka (Oryzias Latipes), Seth R. Davis

Graduate Theses, Dissertations, and Problem Reports (ETD)

An intersex condition, defined as the presence of oocytes in the testes of male gonochoristic fish, has been observed in smallmouth bass in the South Branch of the Potomac River, West Virginia, which indicates exposure to exogenous estrogens. Endocrine disrupting chemicals (EDC's) are generally hydrophobic and would tend to be found within the sediment of aquatic environments. Few studies have attempted to show the effects of exposure to EDC's on fish using sediment chemical extracts. We have developed a mass sediment extraction technique using 2 solvents (hexane, ethyl acetate:acetone 50:50) to determine the effects of extracted chemicals from three sites …

Go to article

First Prev Next Last