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 6871 - 6900 of 11969

Full-Text Articles in Entire DC Network

Wireless Sensor Networks In Underground Structures, Derrick Morgan Dec 2009

Wireless Sensor Networks In Underground Structures, Derrick Morgan

Graduate Theses, Dissertations, and Problem Reports (ETD)

With the growing interest in developing a system capable of monitoring the health of an underground structure, the research and design of such a system is a logical step. The objective of the research performed was to take that step and develop a system capable of monitoring the health of an underground structure. In order to initiate the process, requirements of the system or network to be developed were set so that the research and design would have some guidance.;The research that followed from the requirements led to the selection of a wireless network which utilizes the Zigbee protocol. Various …

Go to article

Development Of A Coal Reserve Gis Model And Estimation Of The Recoverability And Extraction Costs, Chandrakanth Reddy Apala Dec 2009

Development Of A Coal Reserve Gis Model And Estimation Of The Recoverability And Extraction Costs, Chandrakanth Reddy Apala

Graduate Theses, Dissertations, and Problem Reports (ETD)

The United States has the world largest coal resource and coal will serve as the major and dependable energy source in the coming 200 years or more. However, the amount of recoverable coal reserve depends on the geological formations and quality of the coal seams, future development of mining technology and the extraction cost. A NETL sponsored cooperative research was conducted by the researchers at Carnegie Mallon University (CMU) and West Virginia University (WVU) to estimate the recoverable coal reserve. This thesis presents some of the works that WVU performed to enhance the coal reserve model including characterization of coal …

Go to article

Modeling Of Jet Engine Abnormal Conditions And Detection Using The Artificial Immune System Paradigm, Jaclyn Marie Porter Dec 2009

Modeling Of Jet Engine Abnormal Conditions And Detection Using The Artificial Immune System Paradigm, Jaclyn Marie Porter

Graduate Theses, Dissertations, and Problem Reports (ETD)

Previous research at WVU has yielded promising results in the detection of aircraft sub-systems malfunctions using the artificial immune system (AIS) paradigm. However, one aircraft component that requires improvement is the aircraft propulsion system. In this research effort, MAPSS, a non-real time low-bypass turbofan engine model distributed by NASA, has been linearized and interfaced with the WVU F-15 model and the WVU 6 degrees-of-freedom flight simulator to provide a more complex engine model and create more options for engine failure modeling and engine failure detection. A variety of engine actuator and sensor failures were modeled and implemented into the simulation …

Go to article

Quantifying Changes In Ecological Function Of Headwater Catchments Following Large-Scale Surface Mining In Southern West Virginia, Gretchen Anne Gingerich Dec 2009

Quantifying Changes In Ecological Function Of Headwater Catchments Following Large-Scale Surface Mining In Southern West Virginia, Gretchen Anne Gingerich

Graduate Theses, Dissertations, and Problem Reports (ETD)

West Virginia is one of the leading producers of coal in the United States. Large scale surface mining (mountaintop removal mining, MTR) has become commonplace in WV as a technique for accessing thin layers of coal that may be difficult or impossible to access through traditional underground mining techniques. MTR disturbs large areas of land and often results in a complete rearrangement of headwater catchments. Although restoring original pre-mining conditions is ideal, it is usually unrealistic in this region. Consequently, the extent to which post-reclamation watersheds function relative to the pre-mining conditions is unclear. The objectives of this study were …

Go to article

Incremental Development And Cost-Based Evaluation Of Software Fault Prediction Models, Yue Jiang Dec 2009

Incremental Development And Cost-Based Evaluation Of Software Fault Prediction Models, Yue Jiang

Graduate Theses, Dissertations, and Problem Reports (ETD)

It is difficult to build high quality software with limited quality assurance budgets. Software fault prediction models can be used to learn fault predictors from software metrics. Fault prediction prior to software release can guide Verification and Validation (V&V) activity and allocate scarce resources to modules which are predicted to be fault-prone.;One of the most important goals of fault prediction is to detect fault prone modules as early as possible in the software development life cycle. Design and code metrics have been successfully used for predicting fault-prone modules. In this dissertation, we introduce fault prediction from software requirements. Furthermore, we …

Go to article

Superintendent Efficacy Investigation Of A Six -Component Leadership Framework For Developing Effective Learning Environments, Frank D. Devono Dec 2009

Superintendent Efficacy Investigation Of A Six -Component Leadership Framework For Developing Effective Learning Environments, Frank D. Devono

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study, using the Superintendent Efficacy Questionnaire (Devono, Diaz & Callejo Perez, 2008), compared 413 West Virginian K--12 superintendents', principals' and teachers' perceptions of 6 superintendent leadership components: staff development administration, communication of mission, curriculum/instruction expertise, collaboration with the school board, consensus-building ability, and political bearing.;A Kruskal-Wallis test produced significant results for 2 components: the superintendent's ability to (a) clearly articulate a mission that establishes direction/priorities for the system (chi2 = 10.99; df = 2; p = 0.004), and (b) work with the local school within the budget (chi2 = 7.260; df = 2; p = 0.027). Related sample t …

Go to article

Ludwig Van Beethoven's Orchestration Of The Trombone, Daniel R. Cloutier Dec 2009

Ludwig Van Beethoven's Orchestration Of The Trombone, Daniel R. Cloutier

Graduate Theses, Dissertations, and Problem Reports (ETD)

Ludwig Van Beethoven is considered one of the first composers to fully realize the wide-ranging performance potential of the trombone. Although the instrument had already been scored in sacred and operatic works by major composers (and symphonies by lesser-known composers), it was Beethoven who was considered to be the first to truly emancipate the trombone from its sacred and operatic boundaries and write for it in various secular, choral, and even chamber music genres. In this paper, every composition of Beethoven's that includes trombones is examined. The historical context of each individual work will be established, along with any general …

Go to article

Preadmission Academic Achievement Criteria As Predictors Of Nursing Program Completion And Nclex -Rn Success, Tanya L. Rogers Dec 2009

Preadmission Academic Achievement Criteria As Predictors Of Nursing Program Completion And Nclex -Rn Success, Tanya L. Rogers

Graduate Theses, Dissertations, and Problem Reports (ETD)

Admission policies and practices in higher education, including those in nursing programs, are diverse; yet administrators have traditionally relied upon preadmission academic achievement for selection of qualified students. Higher education administrators have the responsibility to serve the institution and all of its constituents, ensuring that admission policies and regular systematic evaluation of those policies are important aspects of that service.;The nursing shortage and limited resources have pressed nursing schools to implement innovative strategies to increase the number of qualified graduates. State University's School of Nursing has used a score sheet to rank associate degree nursing applicants since 1984. The preadmission …

Go to article

Abet Accreditation Criteria, Outcome H And Global Competencies In Engineering Education, Elisabeth Sanchez-Goni Dec 2009

Abet Accreditation Criteria, Outcome H And Global Competencies In Engineering Education, Elisabeth Sanchez-Goni

Graduate Theses, Dissertations, and Problem Reports (ETD)

The dissertation focuses on one aspect of the accreditation process of engineering programs in the United States, which is conducted under the standards of the Accreditation Board for Engineering and Technology (ABET). Engineering programs seeking accreditation are required to comply with the so called Engineering Criteria 2000 (EC2000), which has been divided into eleven "learning outcomes," labeled a through k. The dissertation addresses one of them, "Outcome h", which specifically calls for "the broad education necessary to understand the impact of engineering solutions in a global, economic, environmental, and societal context.";The dissertation examines what engineering departments, from the Southern Regional …

Go to article

Soldiers And Stereotypes: Mountaineers, Cultural Identity, And World War Ii, C. Belmont Keeney Dec 2009

Soldiers And Stereotypes: Mountaineers, Cultural Identity, And World War Ii, C. Belmont Keeney

Graduate Theses, Dissertations, and Problem Reports (ETD)

To what extent are Appalachian stereotypes true and how much is pure fabrication? This study seeks to answer this question by examining the experiences of West Virginia soldiers during World War II. Appalachian hillbillies, believed to be culturally backward, uncivilized, isolated, and prone to violence, were often sent straight to the infantry because it was believed that their wild mountain heritage made them inherently better fighters. Using interviews, letters, and a collection of over 1,200 firsthand written accounts of Appalachian veterans collected by West Virginia University in 1946, this study traces the evolution of the cultural and individual identities of …

Go to article

Teacher Decision Making And The Implementation Of An Integrated Arts Curriculum, Mary K. Devono Dec 2009

Teacher Decision Making And The Implementation Of An Integrated Arts Curriculum, Mary K. Devono

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examines the impact of teacher decision making upon implementing an integrated arts curriculum. Qualitative research methods, including interviews, lesson plan document analysis, and teacher discussion of student artwork comprise the research data from eight elementary classroom teachers. This study is designed to add to the descriptive data on teacher perceptions, especially with regard to their professional autonomy, and ultimately, the decisions within their sphere of influence---the classroom arts curriculum. The implications of this study reveal insight into teacher decision making. The research provides knowledge that contributes to professional development initiatives, acquisition of instructional and curricular resources, and student …

Go to article

The Perceptions Of Practicing West Virginia K-3 Reading Teachers Of Working With Reading First Coaches In Title I Distinguished Schools, Karen R. Davies Dec 2009

The Perceptions Of Practicing West Virginia K-3 Reading Teachers Of Working With Reading First Coaches In Title I Distinguished Schools, Karen R. Davies

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research was conducted to offer insight regarding how Reading First K--3 teachers working in West Virginia Title I Distinguished Schools perceive the role of the reading coach. The study examined the importance of reading coach activities in improving reading instruction as perceived by these K--3 teachers. It was further investigated whether differences existed between reading coach activities perceived by the teachers as important to improving reading instruction and knowledge by these teachers that the activities were performed by the coaches. An electronic survey was distributed to all Reading First K--3 teachers working in West Virginia Title I Distinguished Schools …

Go to article

A Market Assessment Of Greenhouse Products And Associated Rural Development In Semi-Arid Regions Of Mexico, Edgar Arturo Quevedo-Martinez Dec 2009

A Market Assessment Of Greenhouse Products And Associated Rural Development In Semi-Arid Regions Of Mexico, Edgar Arturo Quevedo-Martinez

Graduate Theses, Dissertations, and Problem Reports (ETD)

Greenhouse products represent a feasible alternative for small producers compared to open-field production. Using a combination of enterprise budgeting, capital investment analysis and optimization, we found that under most of the conditions investigated the six different crops investigated are profitable. Greenhouse production has the added benefits of conserving scarce land and water resources, potentially reducing production and market risk, and offering consumers healthful products of good quality, that can contribute to the development of the local economy. One problem is that a larger up-front investment is often essential.;This study focused on three main areas: (1) A production and market assessment. …

Go to article

A Software Response To Hard Drive Encryption, Justin John Mccarty Iii Dec 2009

A Software Response To Hard Drive Encryption, Justin John Mccarty Iii

Graduate Theses, Dissertations, and Problem Reports (ETD)

Current computer forensic practices primarily advise analysts to review and search all digital evidence within designated labs. This practice does not take into account the possibility of encryption software being present on the suspect machine. As a result, possible evidence may become unrecoverable to the investigator. This paper will review the current standard operating procedures used by law enforcement, complications with current procedures with regard to encryption, and the design of a free to use utility for law enforcement to facilitate live analysis.

Go to article

In Situ Structural And Compositional Analysis Using Rheed Electrons Induced X-Rays, Sandeep Chandril Dec 2009

In Situ Structural And Compositional Analysis Using Rheed Electrons Induced X-Rays, Sandeep Chandril

Graduate Theses, Dissertations, and Problem Reports (ETD)

The use of x-ray fluorescence (XRF) for in-situ chemical analysis of a sample surface using an electron gun for reflection high energy electron diffraction (RHEED) analysis has been studied by many groups and the technique is usually referred to as RHEED-total-refection-angle x-ray spectroscopy (RHEED-TRAXS), as the angle for x-ray detection was set close to the angle of total internal reflection.;In the current work, RHEED-TRAXS was developed as a thin film structural characterization technique based on the principles similar to the analysis of a multilayered structure by angular-dependent total-reflection x-rays. Initial experiments utilizing the technique for relative compositional analysis have also …

Go to article

Cryptic Subtelomeric Rearrangements And Studies Of Telomere Length, Jasen Lee Wise Dec 2009

Cryptic Subtelomeric Rearrangements And Studies Of Telomere Length, Jasen Lee Wise

Graduate Theses, Dissertations, and Problem Reports (ETD)

Study One. An estimated five percent of individuals with unexplained mental retardation (MR) have chromosomally unbalanced subtelomere regions. Around half of these individuals inherited the imbalance from a parent with a balanced rearrangement. The frequency of carriers for cryptic balanced translocations is unknown. To determine this frequency, blood samples received from 565 out of 978 phenotypically normal, unrelated individuals were examined using fluorescent in situ hybridization (FISH) probes to analyze all subtelomere regions. No balanced subtelomeric rearrangements were identified. The frequency of balanced cryptic translocations in the general population was estimated to be 1/8,000 from the literature. However, three females …

Go to article

Characteristics Of Subordinate Follicles Following Removal Of The Dominant Follicle: Induction Of Selection, Matthew Dean Dec 2009

Characteristics Of Subordinate Follicles Following Removal Of The Dominant Follicle: Induction Of Selection, Matthew Dean

Graduate Theses, Dissertations, and Problem Reports (ETD)

In mammals, ovarian follicles begin as primordial follicles. Over time these follicles are gradually activated and begin growth. As they proceed, granulosal and thecal cells are acquired. Eventually, the follicles become dependent on FSH for survival. Two or three times each cycle, a transient increase in FSH allows a cohort of follicles, including the follicle that will ovulate, to continue growing. However, these follicles secrete inhibin and estradiol, which suppress FSH secretion. Eventually, all the follicles of the cohort undergo atresia due to the declining concentrations of FSH, except for the follicle which has the potential to ovulate. This follicle …

Go to article

Text Format, Text Comprehension, And Related Reader Variables, Jodi L. Nichols Dec 2009

Text Format, Text Comprehension, And Related Reader Variables, Jodi L. Nichols

Graduate Theses, Dissertations, and Problem Reports (ETD)

This investigation explored relationships between format of text (electronic or print-based) and reading comprehension of adolescent readers. Also in question were potential influences on comprehension from related measures including academic placement of participants, gender, prior knowledge of the content, and overall reading ability. Influences were measured through an unaided text retell and a constructed-response assessment with traditional questioning. Participants' reading preferences and self-reported reading behaviors were also explored.;Findings from regression analyses revealed that format of the text was not a significant predictor of reading comprehension for seventh grade students, despite participants' self-reported preference to reading electronic text. Conversely, participants' academic …

Go to article

The Development, Implementation And Evaluation Of A System Based Physical Activity Promotion Program In A Free, Rural, Primary Care Clinic, Martha E. Summers Dec 2009

The Development, Implementation And Evaluation Of A System Based Physical Activity Promotion Program In A Free, Rural, Primary Care Clinic, Martha E. Summers

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background. Despite the consequences of physical inactivity, it is under recognized and not addressed consistently in primary care. The Healthy People 2010 recommendations are that adults should engage in at least 30 minutes of moderate physical activity on most, preferably all, days of the week. Clinical practice guidelines advise that primary care practitioners take the opportunity whenever possible to advise, discuss, negotiate, or encourage physical activity in inactive adults. Objective. The primary objective was to identify beliefs about physical activity that act as barriers among providers and to educate them about the current recommendations for physical activity. An additional objective …

Go to article

A Web-Based System For Course Instruction And Student Advising, Praveen Danda Dec 2009

A Web-Based System For Course Instruction And Student Advising, Praveen Danda

Graduate Theses, Dissertations, and Problem Reports (ETD)

Academic advising plays an important role in student success in college, freshman students who join the universities with certain goals may face difficulties in course selection, whom to contact, and where to get course information. Considering this, each student in the university is assigned an advisor from his/her department who can address student's problems during their academic years in the college. The advisors spend considerable amount of time in analyzing student performance during the semester by viewing the student's grades and transcripts. The rise in student enrollment in engineering majors at West Virginia University is making it increasingly difficult for …

Go to article

Adsorptive Removal Of Nitrogen From Coal-Based Needle Coke Feedstocks Using Activated Carbon, Sreeja Madala Dec 2009

Adsorptive Removal Of Nitrogen From Coal-Based Needle Coke Feedstocks Using Activated Carbon, Sreeja Madala

Graduate Theses, Dissertations, and Problem Reports (ETD)

A low percentage of nitrogen in needle coke feedstocks is desired for the reduction of puffing during the process of graphitization of needle coke. The purpose of the present study is to investigate the removal of nitrogen species from a coal-based needle coke feedstock, when treated with both commercial activated carbon, Nuchar SA 20 and "coal-derived" activated carbon, WVUAC 900-15. Koppers coal tar distillate (CTD), which has 1.1% wt starting nitrogen content, is selected as the needle coke feedstock. A series of experiments was performed to establish a standard procedure for the removal of nitrogen species. Using the established experimental …

Go to article

Evaluation Of The Expansion Of Behavioral Health Services In A Rural, Primary Care Clinic: A Pilot Project, Carolyn L. Donovan Dec 2009

Evaluation Of The Expansion Of Behavioral Health Services In A Rural, Primary Care Clinic: A Pilot Project, Carolyn L. Donovan

Graduate Theses, Dissertations, and Problem Reports (ETD)

The trend towards integrated behavioral health and primary care services has been supported by the literature. To meet the growing demand for such services, one rural primary care clinic initiated and evaluated a pilot program increasing the number of behavioral health providers. One additional counselor was hired for six hours a week for twelve weeks. The aim of the evaluation was to determine if there was an increase in availability of services, improved communication about referred patients among providers, and increased satisfaction among patients. While outcomes were not statistically significant, positive changes were noted in all areas. The implementation was …

Go to article

Initiating A Practice Change: Prescribing Probiotics Concurrently With Antibiotic Therapy, Patty Hermosilla Dec 2009

Initiating A Practice Change: Prescribing Probiotics Concurrently With Antibiotic Therapy, Patty Hermosilla

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background and significance. Over half of all hospitalized patients are treated with antibiotics and antibiotic use is rising. There has been a 500% increase in antibiotic associated diarrhea, a common side effect of antibiotic use, in the last decade. Probiotics are a safe and cost effective measure to prevent or reduce antibiotic associated diarrhea.;Problem statement. The majority of patients admitted to the medical intensive care unit receive antibiotic therapy; however, few are prescribed probiotic therapy concurrent with antibiotics.;Project design. Education was provided to health care providers regarding antibiotic associated diarrhea and the benefits of probiotic use. A guideline was developed …

Go to article

The Principal's Role In Creating A School Culture That Fosters Achievement Of Students With High Incidence Disabilities: A Study Of One School, Shelby B. Haines Dec 2009

The Principal's Role In Creating A School Culture That Fosters Achievement Of Students With High Incidence Disabilities: A Study Of One School, Shelby B. Haines

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to examine the role of the principal in shaping a school culture that fostered academic achievement of students with high incidence disabilities. Research was conducted by means of a qualitative case study approach with data courses of informant interviews, parent focus group, observations of the daily workings of the school, and artifact reviews. Data unveiled five prominent areas of school culture: rituals, collaboration, an individualized instructional focus, community, and social emotional support. Each of these findings are defined and discussed based on data collected throughout the study. Data also support four additional findings in …

Go to article

A Reconceptualized Analysis Of The West Virginia 4-H Global Education Program: Attitudes Of Agents, Specialists, And Volunteers, Ahmed M. Abdulai Dec 2009

A Reconceptualized Analysis Of The West Virginia 4-H Global Education Program: Attitudes Of Agents, Specialists, And Volunteers, Ahmed M. Abdulai

Graduate Theses, Dissertations, and Problem Reports (ETD)

Global Education has been and continues to be an important aspect of American higher educational curriculum. Its importance is evidenced not only at the formal educational sector, but also within youth development programs like the West Virginia 4-H program.;The author contends that, the importance of global education is more relevant in the 21st century due to the increasing interdependence of the global world. The study looks at the perceived attitudes of 4-H Agents, Specialists, and Volunteers towards global education and how such an educational program affects the youth development of the 4-Her.;The present study, which is partly based on John …

Go to article

Internationalization Of Higher Education And Study Abroad Programs At U.S. Research Universities: A Social Systems Study, Chunmei Yao Dec 2009

Internationalization Of Higher Education And Study Abroad Programs At U.S. Research Universities: A Social Systems Study, Chunmei Yao

Graduate Theses, Dissertations, and Problem Reports (ETD)

Internationalization of higher education institutions has become comprehensive and complex phenomenon in the United States since the 1990s. This trend has significantly motivated American colleges and universities involving all members within their communities to internationalize their institutions and increase their global competitiveness.;The purpose of this study was to assess institutional efforts on internationalization of higher education institutions through the lens of study abroad programs coordinated by the centralized Offices of International Programs (OIPs) at U.S. research universities. It assessed whether relationships existed between institutional input to study abroad programs through human resources and financial resources, the process of administration and …

Go to article

Increasing Rewards And The Impact On Student Behavior And School -Wide Discipline: A Mixed Methods Study, Lorri Rumburg Dec 2009

Increasing Rewards And The Impact On Student Behavior And School -Wide Discipline: A Mixed Methods Study, Lorri Rumburg

Graduate Theses, Dissertations, and Problem Reports (ETD)

This mixed method, embedded, correlational study's aim was to make explicit the relationships between changed procedures in one elementary school's PBIS universal program and student behavior as measured by office discipline referrals. A secondary aim was to use student and faculty responses on surveys to interpret participants' reactions to the increases in rewards, recognitions, and self-charting of daily behavior.;The type of data collected consisted of office discipline referrals generated over the course of the study year. Numerical data analysis also incorporated student totals for earned coupons, earned rewards and earned behavior points. Students surveys completed in October and May gauged …

Go to article

College Students' Knowledge About Sexually Transmitted Diseases In Relation To Sexual Self-Efficacy, Mychael Brooke Masters Dec 2009

College Students' Knowledge About Sexually Transmitted Diseases In Relation To Sexual Self-Efficacy, Mychael Brooke Masters

Graduate Theses, Dissertations, and Problem Reports (ETD)

Resources associated with learning about sexually transmitted diseases (STDs) were investigated in relation to college students' sexual knowledge and sexual self-efficacy. Participants included 50 male and 67 female students ages 18, 19, and 20 at West Virginia University. Self-report surveys included the Sexually Transmitted Disease Knowledge Questionnaire (STD-KQ; Jaworski & Carey, 2007), the Self-Efficacy Questionnaire (Cecil & Pinkerton, 1998), and a measure developed by the investigator on resources used by college students to learn about STDs. No relationship was identified between resources used to learn about STDs and college students' sexual knowledge. However, sexual knowledge was a significant predictor of …

Go to article

Climatic And Edaphic Influences On The Radial Growth Of Eastern Redcedar (Juniperus Virginiana), Smoke Hole Canyon, West Virginia, Joshua A. Wixom Dec 2009

Climatic And Edaphic Influences On The Radial Growth Of Eastern Redcedar (Juniperus Virginiana), Smoke Hole Canyon, West Virginia, Joshua A. Wixom

Graduate Theses, Dissertations, and Problem Reports (ETD)

The annual variability observed in tree-ring records has been used to reconstruct climate conditions at the local, regional, and global scales. Dendrochronology, the study of tree rings, has typically focused on locations where trees are limited by a single climatic variable (i.e. temperature or moisture availability) at the limits of their range. Individual trees, however, may be limited by one or more variables well within their ecological range. This can occur when individuals are located on ecologically extreme sites where soil moisture and chemistry or increased evapotranspiration impede a tree's ability to grow.;This study examines factors affecting radial growth of …

Go to article

Variation Among Phytophthora Cinnamomi Isolates From Oak Forest Soils In The Eastern United States, Jordan E. Eggers Dec 2009

Variation Among Phytophthora Cinnamomi Isolates From Oak Forest Soils In The Eastern United States, Jordan E. Eggers

Graduate Theses, Dissertations, and Problem Reports (ETD)

Phytophthora cinnamomi isolates, collected from eastern US forest soils, were studied to determine the extent of phenotypic, genotypic, and pathogenic variation present. Four microsatellite loci were targeted for genetic analysis. Phenotypic characteristics measured were sporangia length, width, and length:width ratio; chlamydospore, oogonia, and oospore diameter; antheridia width, colony morphology on PDA; and colony growth rate on clarified V8 agar at 20°C, 24°C, 28°C, and 32°C. Red oak logs were inoculated with select isolates to determine relative pathogenicity. Microsatellite analysis showed that the genetic variability of the eastern US oak forest P. cinnamomi isolates was low. Isolates were grouped into two …

Go to article

First Prev Next Last