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Studies On Molecular Mechanisms Of The Immunotoxic Effects Of Propanil On T Cell Development And Cytokine Production., Wei Zhao
Graduate Theses, Dissertations, and Problem Reports
Propanil is a post-emergent herbicide which has been extensively used for control of weeds in rice and wheat field. Acute exposure to propanil central nervous system depression, loss of a righting reflex, and cyanosis. The immunotoxic effects of propanil on animals include reduction of thymus weight and cellularity with increase of spleen weight and cellularity, inhibition of humoral and cell-mediated immune response and alteration NK cell activity and macrophage cytotoxicity. The overall goal of this project is to investigate the mechanism and recovery of propanil induced thymic atrophy and the effect of propanil on T cell cytokine production. Using cell …
Soil-Structure-Fluid Interaction By Hybrid Fem-Bem., Chaojin Xu
Soil-Structure-Fluid Interaction By Hybrid Fem-Bem., Chaojin Xu
Graduate Theses, Dissertations, and Problem Reports
Soil-structure-fluid systems like U-lock, pipelines, and storage tanks are widely used in engineering practice. Relatively very few works can be found in the literature for the analysis of a soil-structure-fluid system subjected to externally applied loads or seismic excitations. The main purpose of this study is to develop a numerical method for the analysis of a soil-structure-fluid system. In the formulation of the presented numerical method, the flexibility of the thin plate structure is treated with a finite element formulation, while the difficulty in modeling the infinite extent of the soil is overcome by a boundary element formulation. The contained …
An Assessment Of Chinese Culture Courses In The Colleges And Universities Of The United States And Canada., Zi-Qiao Zhang
An Assessment Of Chinese Culture Courses In The Colleges And Universities Of The United States And Canada., Zi-Qiao Zhang
Graduate Theses, Dissertations, and Problem Reports
The purpose of this study was to examine the content presented in the Chinese culture courses offered in the colleges and universities in the United States and Canada. The scope of study was the 83 colleges and universities that have Chinese programs. A questionnaire was created as the tool to solicit information. Before the questionnaire was finally revised, a jury of experts was chosen and their opinions and suggestions were taken to improve the questionnaire. Then, a pilot study was conducted with the refined questionnaire sent to 14 ESOL teachers of Anne Arundel County Public Schools. The feedback of these …
Isoforms Of Sodium,Potassium-Atpase In Rat Erythroblastic Cells., Chun-Shia Chang
Isoforms Of Sodium,Potassium-Atpase In Rat Erythroblastic Cells., Chun-Shia Chang
Graduate Theses, Dissertations, and Problem Reports
The sodium pump activity declines rapidly after denucleation of erythroblastic cells. To investigate whether this decrease in the rat erythroblastic cells is due to changes in isoforms of the {dollar}\\alpha{dollar} and {dollar}\\beta{dollar} subunits of the Na,K-ATPase during maturation, techniques of cryoultramicrotomy and immunoelectron microscopy with protein-A-gold were used. Specific antisera against various isoforms of the {dollar}\\alpha{dollar} and {dollar}\\beta{dollar} subunits of rat Na,K-ATPase were used to label the bone marrow and red blood cells of rats. Three types of cells of the erythroid series at different stages of maturation were studied: erythroblasts, reticulocytes and mature red blood cells. It was found …
High School Principals' Perceptions Of Selected Middle School Preferred Practices Applied At High Schools Within West Virginia, Washington, And Indiana: Relationship To Student Dropout Rate, Attendance, Disciplinary Actions, And Academic Achievement., Patrick Jay Tray
Graduate Theses, Dissertations, and Problem Reports
Since the early 1970's increasing research has been conducted concerning more effective education of middle school students (Ages 10-14). Over the years a number of preferred practices (19) have been identified which promote a learning environment that more effectively meets the academic, social, and emotional needs of that transitional age as opposed to the more traditional, high school like, practices found within the junior high school setting. It has been concluded by most middle school practitioners and researchers that the more extensive the application of these (19) preferred practices within the Middle School the more improved student performance would be …
Families Of Premature Infants: An Analysis Of Physical Abuse Risk Factors., Kimberly J. Ujcich
Families Of Premature Infants: An Analysis Of Physical Abuse Risk Factors., Kimberly J. Ujcich
Graduate Theses, Dissertations, and Problem Reports
Physical abuse of children is a major social issue affecting families. Children under the age of three, children with disabilities, and those born prematurely have each been shown to be high risk populations for experiencing physical abuse. This study investigated several child, family, and environmental factors associated with physical abuse within a population of children born prematurely. Forty-five mother-child dyads from each of three chronological age groups (6 months, 12 months, and 18 months) participated. Home sessions were conducted in which mothers completed questionnaires, children were assessed for developmental abilities, and mother-child dyads were observed during feeding interactions. Demographic and …
A Comparison Of The Performance Of Developmental Students With Regular Students In A College-Level Mathematics Course., Anthony Joseph Vavra
A Comparison Of The Performance Of Developmental Students With Regular Students In A College-Level Mathematics Course., Anthony Joseph Vavra
Graduate Theses, Dissertations, and Problem Reports
The purpose of this study was to compare the performance of developmental students and regular students in a college-level mathematics course at a comprehensive community college. In this study, students were identified as developmental students if they were required to complete a developmental algebra course. Regular students were those students who were not required to complete this developmental algebra course based on their mathematics section ACT score or their ASSET elementary algebra score. The hypotheses were concerned with identifying any significant differences in the performance of the developmental students as compared to the performance of the regular students in a …
Response Time, Process Accuracy And Sequence Accuracy Of Individuals With Specific Learning Disabilities Responding To Auditory And Visual Stimuli., Elizabeth Ann Zicha
Response Time, Process Accuracy And Sequence Accuracy Of Individuals With Specific Learning Disabilities Responding To Auditory And Visual Stimuli., Elizabeth Ann Zicha
Graduate Theses, Dissertations, and Problem Reports
The purpose of this research was to determine whether specific learning disabled students would respond more quickly, accurately, and in the correct sequence to visual and auditory stimuli according to their predetermined modality preference within the context of the gymnasium and using motor skills. Male and female SLD college students (N = 58) were the participants for the study. Students attending Muskingum College were divided into four groups according to their modality preference toward auditory instruction or visual instruction. Modality preference was determined by the Incomplete Word and Visual Closure subtests of the Woodcock-Johnson Tests of Cognitive Ability. One of …
Square Wave Cathodic (Adsorptive) Stripping Voltammetry Of Selenium, Arsenic, Vanadium, And Molybdenum., Hong Li
Graduate Theses, Dissertations, and Problem Reports
The determination of selenium(IV), arsenic(III), vanadium(V), and molybdenum(VI) at sub-nanomolar to picomolar levels has been investigated with square wave cathodic stripping voltammetry (SWCSV) and square wave adsorptive stripping voltammetry (SWAdSV). Se(IV) and As(III) form intermetallic compounds with copper and are deposited at a hanging mercury drop electrode (HMDE). V(V) and Mo(V) form dihydroxynaphthalene (DHN) complexes which can be adsorbed at an HMDE. The reduction currents for the complexes are greatly enhanced by coupling a catalytic effect of bromate, and reaction mechanisms are reported. Generally, square wave voltammetry gives either better or similar sensitivity to linear scan and differential pulse voltammetry. …
Nucleation And Growth Of Gan On Sapphire By Mbe, Steven Buczkowski
Nucleation And Growth Of Gan On Sapphire By Mbe, Steven Buczkowski
Graduate Theses, Dissertations, and Problem Reports
GaN was grown by molecular beam epitaxy in an effort to determine nucleation and growth conditions which lead to high quality, single-crystal films. Atomic force microscopy (AFM) was used to show that growth under Ga-rich conditions promotes the nucleation of films with large nucleation domains leading to a lower density of intrinsic defects related to domain boundaries. These conditions are also shown to promote a 2-D growth mode resulting in films with a high degree of nucleation domain coalescence and surface roughnesses below 2 nm. Addition of atomic hydrogen, using a thermally-cracked source, is shown to increase the growth rate …
Essential Assessment Criteria For Physical Education Teacher Education Programs: A Delphi Study., James Michael Jacobs
Essential Assessment Criteria For Physical Education Teacher Education Programs: A Delphi Study., James Michael Jacobs
Graduate Theses, Dissertations, and Problem Reports
The purpose of this study was to arrive at a consensus of opinion regarding critical elements to be used in the assessment of physical education teacher education (PETE) programs. A pilot study was undertaken with five experts in the field of PETE assessment to determine content validity regarding items determined through the survey of the literature and objectivity in the wording of the survey instrument. Following that process a two round Delphi study was conducted to acquire consensus of opinion regarding the paring down of essential PETE assessments elements from an original list of forty-nine items. The Dolphin method utilizes …
The Hydraulics Revolution: Science And Technical Design Of Urban Water Supply In The Enlightenment., Edward Howard Winant
The Hydraulics Revolution: Science And Technical Design Of Urban Water Supply In The Enlightenment., Edward Howard Winant
Graduate Theses, Dissertations, and Problem Reports
In the later half of the eighteenth century, French engineer-scientists revolutionized hydraulics. Funded by Royal research programs, these experimenters formulated predictive equations for flow velocities and quantities. Their results were published throughout Europe and America, causing a distinct change in the practice of designing aqueducts. Case studies of aquaeducts for Edinburgh in 1721 and New York City in 1838 detail the changes in the practice of hydraulic design. A comparison of these two examples illustrates the practical effects of the new hydraulic formulas. These are presented in chronological order, along with the details of the French research programs which so …
An Experimental Study Of Fluidically Oscillated Natural Gas Flames: Flow Fields And Emissions., Marshalla Michelle Wright
An Experimental Study Of Fluidically Oscillated Natural Gas Flames: Flow Fields And Emissions., Marshalla Michelle Wright
Graduate Theses, Dissertations, and Problem Reports
The intent of this project was to investigate the flow field and emissions of laterally and radially oscillating natural gas flames produced by slot and axisymmetric fluidic nozzles used as burners. The behavior of flames produced by three nozzles was studied. A parametric study was conducted while visualizing and quantifying the flame flow field and measuring emissions produced by the flame. Nozzle configurations included two different-sized axisymmetric nozzles and one slot nozzle. Flame oscillation frequency varied from zero to 35 Hz; equivalence ratios ranged from 0.6 to 1.4. A focusing Schlieren system was designed, constructed, and used to visualize the …
Formation And Structure Of C-8-Oxo/Aryl-Guanine Adducts In Dna., Wai-Ming Yau
Formation And Structure Of C-8-Oxo/Aryl-Guanine Adducts In Dna., Wai-Ming Yau
Graduate Theses, Dissertations, and Problem Reports
In biology and medicine, free radicals are now of intense interest because they have been shown to be involved in many different aspects of metabolism, ranging from oxygen consumption and autocatalysis to xenobiotic metabolism. Formation of free radicals in various systems may contribute to diseases and degenerative processes. Free radicals attack guanine in DNA to give 8-substituted guanine derivatives including C-8-oxo-2{dollar}\\sp\\prime{dollar}-deoxyguanosine (oG) and C-8-aryl guanine derivatives via hydroxy and aryl radicals, respectively. The work to be described herein resulted from studies of both adducts in relation to carcinogenesis and other pathogenesis. This dissertation is divided into five chapters. Chapter I …
Response Acquisition With Delayed Reinforcement In The Presence Of An Irrelevant Operandum., April Michele Williams
Response Acquisition With Delayed Reinforcement In The Presence Of An Irrelevant Operandum., April Michele Williams
Graduate Theses, Dissertations, and Problem Reports
Rats and pigeons responded under schedules of delayed reinforcement in three experiments. Two operanda were available but only one was correlated with reinforcement. In Experiment 1, either operandum could be correlated with reinforcement depending on which was pressed first. Due to this procedure the source of reinforcement varied irregularly between sessions. In Experiment 2, the operandum correlated with reinforcement was pre-determined and remained consistent within conditions. In Experiment 3, the source of reinforcement was pre-determined and varied semi-randomly. Responses were acquired without prior response shaping in the first two experiments and maintained in all three using unsignalled, resetting delays to …
Katelyn's Emergent Literacy Story: A Case Study And Consolidated Literature Review Of The Development Of Literacy From Birth To Three Years., Sherrie Kimberly Wampler
Katelyn's Emergent Literacy Story: A Case Study And Consolidated Literature Review Of The Development Of Literacy From Birth To Three Years., Sherrie Kimberly Wampler
Graduate Theses, Dissertations, and Problem Reports
By definition, the study of emergent literacy must address the literacy development of children from "birth" to "conventional literacy." In actuality, studies of the literacy development of children between the ages of 2 and 4 have become common, while studies regarding literacy development of 1-year-olds is extremely limited and studies beginning at birth even fewer. Through this study, data regarding the language, reading, and writing behaviors of children from birth to three years is identified, consolidated, and confirmed. Two research questions guided this study: (1) What are the emergent literacy behaviors of a child from birth to three years? (2) …
Mechanisms And Control Of Mine Floor Heave., Yajie Wang
Mechanisms And Control Of Mine Floor Heave., Yajie Wang
Graduate Theses, Dissertations, and Problem Reports
Floor heave has been one of the important ground control problems in the underground coal mining industry. However, the mechanisms of floor heave have not been fully understood although some efforts have been made by many researchers. In this research, two mines experiencing floor heave are selected to study the mechanisms of floor heave. By in situ observation, two types of floor heave are identified: Type I floor heave caused by buckling failure of floor, and the Type II floor heave caused by plastic failure and plastic flow of floor material. Based on the observation results, the mechanisms of floor …
The Interrelation Of Gypsy Culture And School Culture: An Ethnography Study Of Interactions., Marina Izquierdo Carter
The Interrelation Of Gypsy Culture And School Culture: An Ethnography Study Of Interactions., Marina Izquierdo Carter
Graduate Theses, Dissertations, and Problem Reports
The purposes of this study were to gain an understanding of the Gypsy culture and to discover the relationship, within the school domain, between the Gypsy children and the non-Gypsy teachers. The study was conducted in Malaga, Spain and lasted two and a half months. The research design for this study was qualitative. Data for this ethnographic research were gathered using three strategies: (1) participant observations, (2) interviews, (3) collecting school magazines. Three models of analysis for collected data were used: Domain analysis, Cultural Themes analysis, and Code Analysis. The Gypsy participants were part of the population of the Gypsy …
The Search For Relevance In The Kenyan Secondary School History: A Case Study Of How The Struggle For Kenyan Independence Is Examined., Ochieng' Olewe K'Olewe
The Search For Relevance In The Kenyan Secondary School History: A Case Study Of How The Struggle For Kenyan Independence Is Examined., Ochieng' Olewe K'Olewe
Graduate Theses, Dissertations, and Problem Reports
The Kenyan government has continuously recognized the potential socialization role of Kenya's history, in particular the topic on Kenya's struggle for independence, as a means of engendering a sense of national consciousness among students. This case study focuses on how this struggle is examined in the current secondary history syllabus, as part of the effort to formulate and implement a relevant syllabus. A qualitative case study design was used to facilitate the study. Consequently, the findings and results are based on the analysis of a triangulation of data, which was collected in Kenya, through interviews, observations, and documents. There were …
Narrating The Pathological, 1837-1848: Revolution And Social Discourse In Carlyle, Dickens, And Gaskell., Scott Aaron Dransfield
Narrating The Pathological, 1837-1848: Revolution And Social Discourse In Carlyle, Dickens, And Gaskell., Scott Aaron Dransfield
Graduate Theses, Dissertations, and Problem Reports
Published during the years that mark the English working-class movement known as Chartism, Thomas Carlyle's French Revolution (1837), Charles Dickens' Barnaby Rudge (1841), and Elizabeth Gaskell's Mary Barton (1848) all present a picture of social revolt. The scenes depicted in these narratives (all of which are based upon historical events--respectively, the French Revolution, the 1780 Gordon Riots in London, and the Chartist rebellion after the failure of the first petition in 1839) strongly suggest that the act of social revolt stems not so much from radical strategies of political action as from the proliferation of a set of dangerous "passions" …
Eliciting Information About Knowledge Structures In Persons With Mild Or Moderate Mental Retardation Through The Use Of Dynamic Assessment And Prototype Theory., Mary Ellen Zeppuhar
Eliciting Information About Knowledge Structures In Persons With Mild Or Moderate Mental Retardation Through The Use Of Dynamic Assessment And Prototype Theory., Mary Ellen Zeppuhar
Graduate Theses, Dissertations, and Problem Reports
Tests that are given to help determine the level of functioning of persons with mental retardation often rely on verbal report strategies. Because individuals with mental retardation have difficulty expressing themselves verbally, our knowledge of what they know is limited. In this study adults with mild and moderate mental retardation were administered the similarities section of the Wechsler Adult Intelligence Scale-Revised, a test of verbal responding, and then given the task of responding verbally or visually to stimulus categories, which were presented verbally or visually. All possible combinations of verbal and visual input and output were used in an assessment …
Studies Of Renal And Biliary Clearance In Severe Kidney Dysfunction: Development Of A Rat Model Mimicking The Pharmacokinetics Of Ceftriaxone In Man., Qinying Zhao
Graduate Theses, Dissertations, and Problem Reports
Ceftriaxone (CRO) is a third generation cephalosporin with a long half-life. The majority of patients with severe renal failure have slightly increased half-lives but a small subset of patients exhibit strikingly prolonged half-lives. The reduced ability of this minority of patients to eliminate CRO by biliary excretion will result in excessive drug accumulation. Therefore, the series of studies included in this dissertation were proposed to develop a renal failure model in rats, to examined the pharmacokinetics of CRO in this animal model, and to explore the biliary excretion mechanisms of CRO. Rats pretreated with uranyl nitrate exhibited a dramatic increase …