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 3841 - 3870 of 4525

Full-Text Articles in Entire DC Network

A Cognitive Developmental Approach To Racial Stereotyping, Empathy And The Relationship Between The Development Of Empathic Understanding And Racial Stereotyping In Euro-American Children., Z. Nilufer Bilgesu Jan 1998

A Cognitive Developmental Approach To Racial Stereotyping, Empathy And The Relationship Between The Development Of Empathic Understanding And Racial Stereotyping In Euro-American Children., Z. Nilufer Bilgesu

Graduate Theses, Dissertations, and Problem Reports (ETD)

In countries where population consists of the members of different ethnic and racial groups, it is important to use a multicultural approach in education. The goal of the present research is to explain the connection between age, cognitive abilities, empathic understanding and their relationship with the social attitude of racial stereotyping. It is possible to see the effect of cognitive limitations of the children in their reasoning about others, and consequently in their empathic understanding and in their racial stereotyping behavior. In this study it was predicted that while the age (maturation) of the children increases, their cognitive abilities would …

Go to article

The Relationships Among Hypermedia-Based Instruction, Cognitive Styles And Teaching Subject-Verb Agreement To Adult Esl Learners., Fuqiang Zhuo Jan 1998

The Relationships Among Hypermedia-Based Instruction, Cognitive Styles And Teaching Subject-Verb Agreement To Adult Esl Learners., Fuqiang Zhuo

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examines the relationships among hypermedia-based instruction, cognitive styles, and teaching subject-verb agreement to adult ESL learners in order to find an effective approach to teach grammar which is a very thorny issue in the field of second and foreign language instruction and learning. Therefore, the effect of hypermedia on grammar instruction and learning is the main focus in this study. The treatment was the employment of hypermedia creating a new learning environment in which the adult ESL learners could be benefited from the advantages of new technology. Based on the current methodologies, approaches, and principles of second and …

Go to article

Genotoxicity Studies Of Roofing Asphalt Fume Condensates In Mammalian Cells., Hongwei Qian Jan 1998

Genotoxicity Studies Of Roofing Asphalt Fume Condensates In Mammalian Cells., Hongwei Qian

Graduate Theses, Dissertations, and Problem Reports (ETD)

The specific aims of the present investigation were to determine the genotoxicity and potential carcinogenicity of WFC of Type I and Type III roofing asphalt by using different genetic endpoints in mammalian cells in vitro and in rat in vivo. Morphological transformation studies in cultured BALB/c-3T3 cells indicated that at concentrations that allow less than 50% survival, neither of the WFC, with or without the hamster liver S9 activation system, significantly increased foci formation in BALB/c-3T3 cells. The conventional and immunofluorescent staining MN assays showed that both types of WFC caused a significant increase in the frequency of MNC and …

Go to article

The Nature Of Semantic Memory Deficits In Alzheimer's Disease: Semantic Degradation Or Working Memory Deficits., Staci Robyn Jan 1998

The Nature Of Semantic Memory Deficits In Alzheimer's Disease: Semantic Degradation Or Working Memory Deficits., Staci Robyn

Graduate Theses, Dissertations, and Problem Reports (ETD)

The nature of semantic memory deficits in Alzheimer's disease (AD) has been subject to controversy. It is unclear whether semantic memory is impaired because of degradation of semantic knowledge or due to information processing deficits. This study compared 18 patients with AD to 18 control participants who did not differ significantly in age, education, or gender on three working memory tasks. Three variations of the Self Ordered Pointing Task (SOPT) which varied in the degree of ability to utilize semantic processing skills were administered. Results indicated that patients with AD demonstrated working memory impairments compared to control participants. However, patients …

Go to article

Immunotoxic Effects Of Pulmonary Exposure To Isobutyl Nitrite In The Murine Macrophage., Avijit Roy Jan 1998

Immunotoxic Effects Of Pulmonary Exposure To Isobutyl Nitrite In The Murine Macrophage., Avijit Roy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Isobutyl nitrite (IBN) is a volatile compound that causes vasodilation and smooth muscle relaxation. A history of abuse of this compound by HIV positive homosexual men has been associated with an increased incidence of Kaposi's Sarcoma, a tumor whose growth is responsive to cytokines. Previous work with the murine pulmonary model has demonstrated that exposure to IBN can suppress cytotoxic T cell ability, reduce the production of nitric oxide by macrophages and impair their ability to kill P815 targets. The overall aim of this project was to further characterize the nature of the immune alteration in the murine macrophages. In …

Go to article

Searching For Evidence Of Transfer Between Drug Facilitators., Mark Aaron Miller Jan 1998

Searching For Evidence Of Transfer Between Drug Facilitators., Mark Aaron Miller

Graduate Theses, Dissertations, and Problem Reports (ETD)

Four experiments were conducted to test whether transfer of stimulus control could be obtained between two drug facilitators, a drug and non-drug facilitator, and two non-drug facilitators. In the first experiment, the presence of methadone signaled which of two key lights would be followed by grain. In the absence of methadone, the contingencies were reversed. Concurrently, the presence of phencyclidine (PCP) signaled which of two additional key lights would be followed by grain. In the absence PCP, the contingencies were also reversed. During transfer tests in which each conditioned stimulus (CS) was presented following administration of each drug facilitator, only …

Go to article

Relationship Between Habitat And Ant Communities In Oak-Dominated Appalachian Forests Treated With Microbial Pesticides., Changlu Wang Jan 1998

Relationship Between Habitat And Ant Communities In Oak-Dominated Appalachian Forests Treated With Microbial Pesticides., Changlu Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Ants in the George Washington (Augusta Co. VA, USA) and Monongahela National Forests (Pocahontas Co. WV, USA) were studied using pitfall traps and bait traps to assess the effect of Bacillus thuringiensis var kurstaki (Foray 48F) and gypsy moth nuclear polyhedrosis virus (Gypchek) application on ant communities and the association of habitat characteristics with ants. Ant samples were also compared by forest, sampling year and season, sampling method, and sampling micro-habitat. Pitfall traps were operated for 45 weeks during summers of 1995 to 1997. Bait traps were set up and collected 42 times during the same period. A total of …

Go to article

Examination Of The Alpha(1)-Adrenoceptor Signal Transduction Cascade In Salt-Sensitive Hypertension., James M. Culhane Jan 1998

Examination Of The Alpha(1)-Adrenoceptor Signal Transduction Cascade In Salt-Sensitive Hypertension., James M. Culhane

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of these studies were to identify the sites of changes in the {dollar}\\alpha\\sb1{dollar}-adrenoceptor signal transduction cascade responsible for a specific supersensitivity to norepinephrine (NE) that develops in the mesenteric arterial vascular bed from Dahl salt-sensitive rats (DS) maintained on a high salt diet (HS) for five days or three weeks as compared to Dahl salt-resistant rats (DR). Perfusion studies using the isolated perfused superior mesenteric arterial vascular bed from five day DSHS and DRHS rats and nifedipine, an L-type calcium channel blocker, were performed to assess tissue reliance on extracellular calcium for contraction. This study demonstrated that in …

Go to article

The Relation Between Cardiovascular Reactivity To Stress And Family History Of Hypertension: Examination Of Overt And Covert Responses To Stressors., Nicole Lynn Frazer Jan 1998

The Relation Between Cardiovascular Reactivity To Stress And Family History Of Hypertension: Examination Of Overt And Covert Responses To Stressors., Nicole Lynn Frazer

Graduate Theses, Dissertations, and Problem Reports (ETD)

Research has suggested that cardiovascular reactivity to stress may be a risk factor for the development of cardiovascular disorders (Manuck, 1994). Offspring of hypertensives have been hypothesized to be at greater risk for developing cardiovascular disorders through these exaggerated cardiovascular responses to stress, and therefore have been the focus of much research. Little empirical attention has been paid to the relation between other overt (e.g., verbal behavior) or covert (e.g., self-reported anger) responses exhibited during the laboratory session and family history status or cardiovascular reactivity to stress. The purpose of this investigation was to examine differences in overt and covert …

Go to article

The Construction Of "The Student Perception Of Teacher Health Scale"., Steven Craig Koehn Jan 1998

The Construction Of "The Student Perception Of Teacher Health Scale"., Steven Craig Koehn

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to construct a student perception of a teacher's health scale. The rationale for the study was the severe lack of research on the effects of a teacher's health in the classroom environment. In addition, the tremendous dropout rate in the teaching profession due to burnout, stress and other health related factors was a key ingredient. Scale construction was deemed an important beginning component in investigation of an area with little prior investigation. The original scale was designed using student focus group participation. A sample of 54 undergraduate subjects were interviewed and audio-taped. Analysis of …

Go to article

The Value Orientations And Perceptions Of Caring Of Ethiopian Nuers., Connie Ann Hall Jan 1998

The Value Orientations And Perceptions Of Caring Of Ethiopian Nuers., Connie Ann Hall

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to systematically describe and analyze differences in value orientations and perceptions of caring of the Ethiopian Nuer. The study addressed the meaning of caring and its most important elements to the Nuer. The study also endeavored to identify relationships between value orientations and perceptions of caring and the demographic characteristics of the sample. The demographic characteristics that were considered included: sex, generation, literacy, place of residence, and religion. The convenience sample for this study was comprised of 54 subjects. They were interviewed in order to complete a demographic questionnaire, the Caring Questionnaire, and the …

Go to article

Digital Science: Electronic Association And Groupware In Facilitating Third Sector Research, Roger A. Lohmann Dec 1997

Digital Science: Electronic Association And Groupware In Facilitating Third Sector Research, Roger A. Lohmann

Faculty & Staff Scholarship

In thinking about the application of computers and the internet technology to problems of association, collaboration and civil society we need to get beyond the current state of mimicking existing social processes and discover new ways to extend and enhance those social processes.

Go to article

Mental Health Experts On Trial: Free Will And Determinism In The Courtroom, Ronald J. Rychlak, Joseph F. Rychlak Sep 1997

Mental Health Experts On Trial: Free Will And Determinism In The Courtroom, Ronald J. Rychlak, Joseph F. Rychlak

West Virginia Law Review

No abstract provided.

Go to article

West Virginia Corporate Law: Is It "Broke"?, Debra R. Cohen Sep 1997

West Virginia Corporate Law: Is It "Broke"?, Debra R. Cohen

West Virginia Law Review

No abstract provided.

Go to article

The Future Of The Third Sector, Roger A. Lohmann Sep 1997

The Future Of The Third Sector, Roger A. Lohmann

Faculty & Staff Scholarship

The U.S. "nonprofit sector" and other forms of contemporary national third sectors which are currently spreading around the world arose in a unique historical moment and for distinct historical reasons and are unlikely to outlast that moment in history. Voluntary action on the other hand has deep roots reaching far back in human history and is likely to be around far into the future.

Go to article

Confusion In Regulating Coal Mine Water Pollution: Regulatory Overlap In Smcra And The Cwa, Brian Peterson Apr 1997

Confusion In Regulating Coal Mine Water Pollution: Regulatory Overlap In Smcra And The Cwa, Brian Peterson

West Virginia Law Review

No abstract provided.

Go to article

Antisense Inhibition Of Silica-Induced Tumor Necrosis Factor In Alveolar Macrophages, Yon Rojanasakul, David N. Weissman, Xianglin Shi, Vincent Castranova, Joseph K. H. Ma, Weiwen Liang Jan 1997

Antisense Inhibition Of Silica-Induced Tumor Necrosis Factor In Alveolar Macrophages, Yon Rojanasakul, David N. Weissman, Xianglin Shi, Vincent Castranova, Joseph K. H. Ma, Weiwen Liang

Faculty & Staff Scholarship

No abstract provided.

Go to article

Arachidonate And Medium-Chain Fatty Acids Inhibit Transcription Of The Acetyl-Coa Carboxylase Gene In Hepatocytes In Culture, Fb Hillgartner, Tina Charron Jan 1997

Arachidonate And Medium-Chain Fatty Acids Inhibit Transcription Of The Acetyl-Coa Carboxylase Gene In Hepatocytes In Culture, Fb Hillgartner, Tina Charron

Faculty & Staff Scholarship

No abstract provided.

Go to article

Isolation And Characterization Of The 22 Kd Subunit Of Gluconate Dehydrogenase Derived From Pseudomonas Aeruginosa Pao1., John David Gordon Jan 1997

Isolation And Characterization Of The 22 Kd Subunit Of Gluconate Dehydrogenase Derived From Pseudomonas Aeruginosa Pao1., John David Gordon

Graduate Theses, Dissertations, and Problem Reports (ETD)

Approximately 95-99% of soil phosphorous is unavailable to plants, with {dollar}\\sim{dollar}90% of phosphate fertilizers also being rendered unavailable upon application. 2-Ketogluconate (2KG) has been shown to solubilize insoluble phosphates in vitro. If plants themselves could solubilize the insoluble phosphate in the soil, this would greatly reduce the need for phosphate fertilizers. Two greenhouse experiments were conducted to examine in vitro and in situ solubilization of insoluble phosphates (calcium phosphate, RP, and iron phosphate, IP) with increasing concentrations of 2KG, as seen through plant (Lycopersicon esculentum) growth and Pi uptake. In the first experiment (in situ solubilization), water alone showed a …

Go to article

Stimulus Control Of Human Punished Behavior: Testing For Generalization., Jennifer Marie O'Donnell Jan 1997

Stimulus Control Of Human Punished Behavior: Testing For Generalization., Jennifer Marie O'Donnell

Graduate Theses, Dissertations, and Problem Reports (ETD)

Punishment may decrease the rate of unpunished behavior (i.e., punishment effects may generalize). Only a few studies with animals (e.g., Honig & Slivka, 1964) have investigated the stimulus generalization of punishment effects, or how they vary systematically with physical properties of stimuli. In a recent study with humans (O'Donnell & Crosbie, in press), each response in the presence of one horizontal line was punished, and generalization of punishment was tested in the presence of nine other lines that differed only in length. Generalization gradients were not obtained, most likely because the punisher became the discriminative stimulus for punishment conditions, thus …

Go to article

A Unique Astrocyte Morphological Plasticity., Joanna B. Bobak Jan 1997

A Unique Astrocyte Morphological Plasticity., Joanna B. Bobak

Graduate Theses, Dissertations, and Problem Reports (ETD)

Morphological plasticity of astrocytes has been hypothesized as vital to ongoing plasticity in the adult central nervous system. However, it has yet to be demonstrated directly that astrocytes are capable of gross morphological changes under non-pathological circumstances in the adult nervous system. In our studies, we have investigated this issue in the glial limitans associated with a well-known model of neuronal plasticity, the hypothalamic supraoptic nucleus. The activity of the neuroendocrine cells comprising this region was stimulated in rats by substitution of 2% saline for drinking water for 2 or 9 days. Light and electron microscopic morphometry revealed that by …

Go to article

Molecular Mechanisms Involved In The Expression And Regulation Of Glucose-6-Phosphate Dehydrogenase By Dietary Polyunsaturated Fatty Acids., Deborah Lynne Hodge Jan 1997

Molecular Mechanisms Involved In The Expression And Regulation Of Glucose-6-Phosphate Dehydrogenase By Dietary Polyunsaturated Fatty Acids., Deborah Lynne Hodge

Graduate Theses, Dissertations, and Problem Reports (ETD)

The goal of this work was to determine how polyunsaturated fatty acids (PUFAs) affect gene expression at the molecular level. Glucose-6-phosphate dehydrogenase (G6PD) is a member of the family of lipogenic enzymes known to be inhibited by dietary PUFAs. Addition of PUFAs to diet causes a 70-80% decrease in G6PD enzyme activity and mRNA accumulation in liver with no change in transcriptional activity of the gene, indicating that regulation occurs at a posttranscriptional step. Similarly, regulation of G6PD by starvation and refeeding results in a 12- to 15-fold increase in G6PD activity and mRNA accumulation but no change in transcriptional …

Go to article

Retrovirus Variation And Rt Template Switching During Retroviral Reverse Transcription: Development Of Novel Retroviral Vectors For Gene Therapy., John George Julias Jan 1997

Retrovirus Variation And Rt Template Switching During Retroviral Reverse Transcription: Development Of Novel Retroviral Vectors For Gene Therapy., John George Julias

Graduate Theses, Dissertations, and Problem Reports (ETD)

The low processivity of retroviral reverse transcriptase and the lack of exonucleolytic proofreading by retroviral reverse trascriptase contribute to the emergence of virus variants in infected hosts. A result of the low processivity of reverse transcriptase is the high frequency deletion of direct repeats in retroviral genomes and vectors. We determined that direct repeats of 383, 788, and 1333 base pairs delete at rates of 28-40, 85, and 93%, respectively, in one round of retroviral replication. Also, we demonstrated that the propensity of reverse transcriptase to switch templates could be used to reconstitute the neomycin resistance gene and delete the …

Go to article

Effect Of Hydrous Oxide Coatings On Adsorption Of Oxyanions By Clay Minerals., Swarn S. Dhaliwal Jan 1997

Effect Of Hydrous Oxide Coatings On Adsorption Of Oxyanions By Clay Minerals., Swarn S. Dhaliwal

Graduate Theses, Dissertations, and Problem Reports (ETD)

Five clay minerals (Well Crystallized Kaolinite (KWC), Poorly Crystallized Kaolinite (KPC), Illite, Attapulgite, and Montmorillonite) with a range of surface characteristics were selected to investigate the adsorption of three oxyanions (molybdate, selenite, and selenate). The minerals were coated with five different levels of each of Fe and Al hydrous oxides. The charge characteristics were determined using potentiometric titration. Adsorption was studied by batch experiment at 11 different concentrations of each of the oxyanions at three different pH levels. Coating with both Fe as well as Al hydrous oxide coatings raised the pH{dollar}\\sb{lcub}\\rm o{rcub}{dollar} (condition where mineral surface is electrically neutral) …

Go to article

The Persistence Of Radiation-Induced Chromosome Aberrations In Mice., Michelle Denise Spruill Jan 1997

The Persistence Of Radiation-Induced Chromosome Aberrations In Mice., Michelle Denise Spruill

Graduate Theses, Dissertations, and Problem Reports (ETD)

As translocations increase in popularity for use as a biodosimeter for prior radiation exposure, information on the possible decline of these 'stable' aberrations over time is desperately needed. This study is the first to assess the stability of radiation-induced chromosome aberrations in vivo over the life span of a rodent model. C57BL/6 female mice were given an acute dose of 0, 1, 2, 3 or 4 Gy {dollar}\\sp{lcub}137{rcub}{dollar}Cs of 8 weeks of age. Metaphase chromosome preparations were made from peripheral blood and bone marrow samples which were taken from 4 mice in each dose group at 1, 8, 15 and …

Go to article

The Ecology Of Darters In The Elk River, West Virginia., Stuart Andrew Welsh Jan 1997

The Ecology Of Darters In The Elk River, West Virginia., Stuart Andrew Welsh

Graduate Theses, Dissertations, and Problem Reports (ETD)

The darter fauna in the Elk River, West Virginia, is extremely diverse (18 species); however, few studies exist on its ecology. This dissertation, which consists of three manuscripts, provides data on the ecology of darters within the Elk River. In the first manuscript, I estimated allozyme variation in the Tippecanoe (Etheostoma tippecanoe) and golden (Etheostoma denoncourti) darters, fishes with extremely fragmented distributions. Despite our findings of low variation at 22 loci, frequency differences at Pgm and Pgdh separated E. tippecanoe and E. denoncourti. The second manuscript is a study of microhabitat use and partitioning in ten darter species. While snorkeling, …

Go to article

Enhanced Mucosal And Systemic Immune Responses To Intestinal Reovirus Infection In Beta2-Microglobulin-Deficient Mice., Amy Major, Christopher Cuff Jan 1997

Enhanced Mucosal And Systemic Immune Responses To Intestinal Reovirus Infection In Beta2-Microglobulin-Deficient Mice., Amy Major, Christopher Cuff

Faculty & Staff Scholarship

No abstract provided.

Go to article

Physical, Chemical, And Microbial Analysis Of Domestic Wastewater Treated By Small Constructed Wetlands Designed For Individual Households., Keith R. Hench Jan 1997

Physical, Chemical, And Microbial Analysis Of Domestic Wastewater Treated By Small Constructed Wetlands Designed For Individual Households., Keith R. Hench

Graduate Theses, Dissertations, and Problem Reports (ETD)

Many small communities located in rural areas of the United States lack adequate domestic wastewater treatment plants. Constructed wetlands are being promoted as low-cost, low-maintenance systems for treatment of domestic wastewater in areas where standard septic tanks fail. In order to evaluate the efficacy of small constructed wetlands, 20 small-scale wetlands mesocosms (100 gal each) containing five plant treatments (no plants/control, Typha, Scirpus, and Juncus monocultures, and all three species combined) were planted into pea gravel at either 18 or 24 inches in depth. Each mesocosm received 5 gal/day of primary-treated domestic sewage. Mesocosms were monitored on a monthly basis …

Go to article

Modulation Of Nociception By The Opioid Peptide Beta-Endorphin In The Periaqueductal Gray., Alyssa A. Hawranko Jan 1997

Modulation Of Nociception By The Opioid Peptide Beta-Endorphin In The Periaqueductal Gray., Alyssa A. Hawranko

Graduate Theses, Dissertations, and Problem Reports (ETD)

Antinociceptive and nociceptive responses can be elicited by the administration of endorphin within the periaqueductal gray region of the midbrain. The pain inhibitory and facilitory systems exist in a state of balance such that under most conditions, the combined activation of these processes by the administration of -endorphin results in the expression of antinociception. However, during other situations, such as stress, the delicate balance between these endogenous systems is disrupted and alterations in the overall response to opioids occurs. When stress is minimized the contribution of the -endorphin dependent pain facilitory systems is minimal and cannot be discriminated unless a …

Go to article

Computer Programming: Science, Art, Or Both?, Sandra Trent Gum Jan 1997

Computer Programming: Science, Art, Or Both?, Sandra Trent Gum

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to determine if spatial intelligence contributes to a student's success in a computer science major or if mathematical-logical intelligence is sufficient data on which to base a prediction of success. The study was performed at a small university. The sample consisted of 15 computer science (CS) majors, enrolled in a computer science class, and 15 non-CS-majors, enrolled in a statistics class. Seven of the CS-majors were considered advanced and seven were considered less advanced. The independent measures were: the mathematics and the English scores from the ACT/SAT (CS-majors); a questionnaire to obtain personal information; …

Go to article

First Prev Next Last