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Iron Acquisition By Cyanobacteria: Siderophore Production And Iron Transport By Anabaena, Peter James Lammers

Dissertations and Theses

The cyanobacterium Anabaena sp. (PCC #6411) is known to produce the siderophore, schizokinen, in response to iron limitation. Environmental factors which influence schizokinen production have been examined utilizing a bioassay method based upon the stimulation of growth of the siderophore-requiring bacterium Arthrobacter flavescens JG-9. Schizokinen production by Anabaena increased in low-iron media and was stimulated approximately five-fold media containing one millimolar citric acid. Growth of Anabaena under nitrogen-fixing conditions reduced extracellular schizokinen concentrations 3-4 fold, in late growth phase, compared to cells grown on nitrate. Cells grown in ammonium-containing medium yielded intermediate concentrations of schizokinen. The Csaky assay, which is …

The Effect Of Chronic Post-Natal Protein Deprivation On The Social Interaction Of The Rhesus Macaque, Gertrude Alice Fogle

Dissertations and Theses

It has been well documented that protein calorie malnutrition (PCM) gives rise to physiological and behavioral deficits. These deficits include changes in emotional, exploratory and social behaviors of the malnourished organism. In particular, previous research has demonstrated that Feci from infancy results in avoidance of and failure to initiate social interactions as well as decreased contact with the environment, which in turn, further disrupt emotional and social development. This study examined the effects of chronic protein malnutrition on the social behavior of adult rhesus macaques by experimentally testing the hypothesis that deficient monkeys, unlike normal well-fed ones, are more likely …

One-Third Octave Band Augmented Speech Discrimination Testing For Normal Hearing Listeners, Nancy Marie Bowen

Dissertations and Theses

The purpose of this study was to investigate the effects of a 500 Hz and 3150 Hz one-third octave band augmentation on the speech discrimination ability of normal hearing listeners and whether such effects vary with signal presentation level. The augmented portion of monosyllabic words was systematically varied from 5-55dB above the intensity level of the unfiltered version of the words and presented simultaneously to one ear.

Adolescent Chemical Substance Use And Abuse : Environmental And Personal Determinants, And A Proposed Model For Group Intervention, Lindy Louise Low Lecoq

Dissertations and Theses

The purpose of the literature review is to identify consistent patterns regarding adolescent use and abuse of chemical substances, especially alcohol and marijuana. Acute physical, cognitive and social effects of alcohol and marijuana use are outlined, and environmental and personal determinants of drug use and abuse are examined. Methods of prevention and intervention are discussed and, from the research findings, a model group counseling program designed for the school setting is proposed. Adolescent use of both marijuana and alcohol is found to be modal by age 16-17. The physical, cognitive and social effects are pervasive and especially damaging to chronic …

Role-Taking And Behavior, Jane Wynne Uphoff

Dissertations and Theses

The present study examined the relationship between the cognitive skill of role-or perspective-taking and naturally occurring behavior of behaviorally disordered children. Twenty-six boys, aged five years, nine months to twelve years, two months were tested and observed at their treatment facility. It was predicted that children who could take the perspective of others would prefer peer to adult interaction, would more likely give positive attention to their peers and would be more likely to use effective language than their non perspective-taking peers. These and related hypotheses were examined by observing each participant's interactive behavior for 36 minutes distributed over three …

The Relationship Of Role Organization And Role Deprivation To Nurses' Views Toward The Requirement For Entry Into Professional Practice And Its Related Issues, Paula G. Morton

Dissertations and Theses

A national resolution to alter the educational and practice requirements for nurses by 1985 has been adopted in Oregon. It has been theorized that how nurses organize their multiple roles and the degrees of role deprivation they experience will affect their views toward professional issues. Prior research suggests there be a relationship between certain demographic variables and nurses' role organization and role deprivation.

The study sought to establish the relationship of selected demographic variables and the variables of type of role organization and deprivation to nurses' views of four facets of the 1985 Resolution. The intent was to examine the …

The Copper Complexation Properties Of Dissolved Organic Matter From The Williamson River, Oregon, Charles Russell Lytle

Dissertations and Theses

Recent research has indicated that dissolved organic matter (DOM) may plan an important role in the ability of natural waters to complex metals. This research was conducted because the quantitative nature of this role is uncertain. Gas-liquid chromatography was used to study the hydrolyzable amino acids at twelve sampling sites on the Williamson River at monthly intervals for two years. The relative abundances showed little spacial or temporal variation. The two-year averages for total amino acids ranged from about 0.5 (mu)M to about 8 (mu)M. A separation technique was used to show that (GREATERTHEQ) 96% of the dissolved amino acids …

Temporal And Phenomenological Aspects Of Social Behavior In Captive Wolves (Canis Lupus L.), Paul C. Paquet

Dissertations and Theses

Although cooperative behavior is generally acknowledged to occur among wolves, there is a lack of systematically collected data confirming the extent of development. The objectives of this study were to collect long-term, detailed observations documenting the role of social structure, seasonal influences, and individual participation in wolf pack cooperative activities. Individual cooperative strategies were associated with age, sex, and social positions and critically compared with results of similar studies. Emphasis was placed on quantifying group and dyadic relationships, focusing on reproductive strategies and dominance structure. Additional data were collected on denning behavior, maternal care behavior, scent marking, and spontaneous individual …

A Study To Determine The Relationship Between Interest As Measured By A Student Interest Inventory And Recreational Nonfiction Books Checked Out Of The Library Media Center By Intermediate Grade Students At Sunnyside Elementary School, North Clackamas School District Number 12, Clackamas, Oregon, Larry Charles Leedy

Dissertations and Theses

The purpose of this study was to determine if a correlation existed between the selection of recreational nonfiction books from a school library media center by elementary school students in grades four through six and the measured interest, as generated by the Student Interest Inventory, of the students. Data for this study was collected during the period September, 1982 and April, 1983 at Sunnyside Elementary School, North Clackamas School District Number 12, Clackamas, Oregon. The raw data for the measured interest and recreational nonfiction books checked out were arranged by Dewey Decimal Classification tens. By using the Pearson product-moment correlation …

The Formation Of A Professional Identity, Richard H. Dana

Regional Research Institute for Human Services

This paper explores the author's formation of a professional identity from undergraduate work to development of training materials.

The Effect Of Parent-Child Interaction On The Language Development Of The Hearing-Impaired Child, Arla J. Melum

Dissertations and Theses

In recent years much interest has been focused on the manner in which the young child acquires language. Some researchers (Chomsky, 1965; McNeil) have postulated an inherent capacity to comprehend and utilize linguistic structures, while others such as Irwin, (1960), Hess and Shipman (1965), and Greenstein, et al, (1974) have focused on experiential determinants of language competence in early childhood. As with all children, the social and emotional behavior of deaf children is greatly influenced by their ability to communicate with significant others. Interactions between the normally developing child and his parents are characterized by mutual responsiveness, where each initiates …

Impacts Of Environmental Design On Residential Crowding, Ed Tieh-Yeu Huang

Dissertations and Theses

This dissertation addresses the following research questions: How do physical features of high density college dormitories affect residents' perception of crowding, and what kinds of design strategies are available for alleviating the perceived crowding? The data source was responses to a self-administered questionnaire from residents of living units which were randomly sampled from three dormitories of comparable physical density at Oregon State University. Seven hypotheses were used to examine the relationship between perceived crowding and physical features associated with different settings in selected dormitories. The first hypothesis sought to clarify how selected physical variables, compared with selected social and personal …

Housing The Low-Income, Urban Elderly: A Role For The Single Room Occupancy Hotel, Mary Ann Burki

Dissertations and Theses

This study examines the question of whether there is a role for the single room occupancy (SRO) hotel as a form of housing for a select group of low-income, urban elderly persons. Such a focus was selected because it is the single room type of housing, with neither individual kitchen nor bath, which HUD defines as substandard. This definition is viewed as problematic for several reasons. First, it has been a major barrier to the use of Federal funds to support such housing either through rehabilitation or rent subsidy, and second, it has been a major incentive to the use …

The Articulation Of Formal And Informal Helping: The Influence Of Organizational Context On Relationships Between Professional And Lay Caregivers, Priscilla J. Kimboko

Dissertations and Theses

This research is an exploratory study of thirty human service agencies' programs to link their services to informal helpers in their communities. The helpers were persons identified as important helping resources to persons in their own social networks, who were often also clients of the service agency. The thirty agencies were drawn from across the nation, and served several different types of client populations and needs. Models from practice and theory suggest that linkages between the formal and informal caregiving systems should be modeled after primary relations, informal and personal in character. Research and literature on organizations suggests, however, that …

A Study Of The Effects Of Active Participation In Instruction Upon Learning, Jerry D. Pratton

Dissertations and Theses

An experimental study of the effects of active participation on student learning was conducted with two levels of treatment of the independent variable. Intact groups were used because it was reasoned that results generated in classroom settings would likely be more generalizable to other classroom settings. The study was conducted in a medium-sized suburban school district mainly residential in character. Five project teachers were trained to teach a lesson on simple probability. Each teacher taught four lessons to fifth grade classes, two with Treatment I (active student participation) and two with Treatment II (no active student participation). The lessons were …

Investigation Of The Contribution Of Aquatic Humus To The Transport Of Ddt In The Environment, Dan Philip Blunk

Dissertations and Theses

The fate and transport of insoluble, hydrophobic organic pollutants in the aquatic environment constitutes a prominent area of concern. It is thought that pollutants of this nature may exist in association with organic carbon, which is predominantly aquatic humus. This type of association could significantly affect the kinetics of such transformation processes as volatilization or chemical and biological degradation of the pollutant. While dissolved organic matter (DOM) comprises the bulk of organic carbon (or aquatic humus) in natural waters, the interaction between naturally occurring DOM and insoluble organic pollutants has not been quantified. The work presented in this dissertation is …

Development Of An Operational System For Monitoring The Changes In Urban Subarea Residential Housing Status: A Spatial Analytic Application Of The Formulations Of Neighborhood Filtering And Neighborhood Dynamics, Harold Chike Mba

Dissertations and Theses

This dissertation focuses on the precise and meaningful measurement of change as it pertains to the urban subarea residential housing status. The word "measurement" is qualified as meaningful in the sense that the approach adopted is of relevance to public policy. Specifically, the dissertation is aimed at providing answers to the following research questions: First, how can the changes in residential housing status in the different parts of an urban area be precisely and meaningfully measured? Second, what variables are most appropriate for the measurement? Third, can these variables be useful for differentiating between various parts of the urban area? …

Proverbs : Tools For World View Studies : An Exploratory Comparison Of The Bemba Of Zambia And The Shona Of Zimbabwe, Larry L. Niemeyer

Dissertations and Theses

The proverbs of people - defined by Webster as short sayings "in common use expressing a well-known truth or common fact ascertained by experience or observation" - have been an object of study to many kinds of people for many decades. Robert R. Marett has said that proverbs are a key to both the language and culture of a people. But, knowledge of the language and culture of a people, in itself, cannot be satisfying to the discerning anthropologist. An effort must be made to identify and understand the categories of thought, codes and symbols that undergird their language and …

Perspectives On Speechlessness : A Case Study, Michelle Alexander Carlson

Dissertations and Theses

This study addresses a problem of speech disruption as an individual abruptly and without explanation stops speaking to those around her. The matter for investigation involves the meaning this event has for those who are closely involved with this individual either in a practical day to day way or in a continuing relationship.

A Study Of Age And Sex-Related Differences In The Perception Of Emotional Stimuli, Nancy Mellor Canizio

Dissertations and Theses

In a tachistoscopic perception task, adult males in the Fels Research Institute's longitudinal population (Kagan and Moss, 1960) were found to have a higher recognition threshold for pictures depicting dependency scenes than adult females. The female subjects had a higher recognition threshold for aggressive scenes than the males.

The present study was designed to further compare male and female perception of dependent and aggressive stimuli by including a developmental component to test if the perceptual differences vary with age. A benign or neutral stimulus category was added to aid in determining direction of any resulting differences: i.e., heightened perception or …

Phonational Frequency Ranges In Vocally Untrained Adults Using Different Cardinal Vowels, Lorie Renee Chambers

Dissertations and Theses

In the clinical management of voice clients, it is important to measure accurate pitch ranges in order to determine if a client has a normal range or is speaking at an optimum pitch. It is not clear from the literature which vowel should be used in determining these pitch ranges. The purpose of this investigation was to determine the phonational frequency ranges in adults with no vocal training when phonating the cardinal vowels of /i/, /u/, and /a/. The investigation sought to answer the following question: Does the phonational frequency range in vocally untrained adults vary significantly when phonating the …

The Acquisition Of Obligatory-Do, Bernadette Maresh-Ericksen

Dissertations and Theses

The auxiliary verb obligatory-do is used in forming questions, negative and emphatic sentences. Currently there is no test or norms established for the acquisition of obligatory-do. The purpose of this study was to establish age trends, via elicited imitation for the acquisition of obligatory-do according to the sentence type in which it expressively occurs i.e., negative sentences, emphatic sentences, interrogative reversals and wh-questions. This study addressed the following question: At what ages do children expressively demonstrate, via elicited imitation, the auxiliary verb obligatory-do in negative sentences, emphatic sentences, interrogative reversals and wh-questions? A secondary question was: In what manner does …

The Red-Tailed Hawk On Sauvie Island, Oregon, Kevin J. Lien

Dissertations and Theses

A study was undertaken to determine the abundance, distribution, perching heights, diets and territory sizes of Red-Tailed Hawks on Sauvie Island, Oregon. Sauvie Island supported a large wintering population of non-territorial Red-Tailed Hawks. The establishment of territories began around 10 January. Average perch height was found to be 14.2 m. Average perch height increased from fall to spring, corresponding-to the onset of the breeding season and to the onset of egg-laying and incubation. Voles (Microtus spp.) were the principal prey year-round, though waterfowl were more important in terms of biomass in the winter and early spring. Territory sizes on the …

A Study Of Factors Affecting Cognitive Style In Mexican-American Children, Anne Kelter Gehrig

Dissertations and Theses

In recent years cognitive style has become the focus of much educational research. Many educators believe that instructional effectiveness can be maximized by utilizing the student's preferred cognitive style as a springboard for introducing new concepts as well as by restructuring educational practices so that the child learns to deal effectively with diverse cognitive styles. Early research on cognitive style focused solely on behavioral indicators. Today many researchers acknowledge that, in order to understand cognitive style, one must examine brain processing, as different styles of thinking result from the manner in which each hemisphere of the brain processes information.

This …

Towards A Measure Of Superior-Subordinate Perceptual Correspondence And Its Relationship To The Performance Appraisal, Elizabeth Duane Vergeer Crist

Dissertations and Theses

The purpose of the present study was to determine what, if any, relationship existed between the correspondence of perceptions between superior-subordinate work dyads and the superior's rating of the subordinate's work performance.

Toward A Measure Of Correspondence In Relational Perceptions In Marital Dyads, Deborah Anne Coker

Dissertations and Theses

In order to assess a component of communication in interpersonal relationships, an instrument was developed to determine the correspondence in relational perceptions between partners in a marital dyad. The current study focuses on the levels of awareness spouses exhibit regarding phenomenological perceptions of themselves, their partners and the status of their dyadic system.

Verbal Fluency Performance Of Normal Elderly Subjects, Molly Secrest

Dissertations and Theses

The purpose of this study was to measure the verbal fluency of normal gerontologic subjects and to determine the extent of association between verbal fluency score and level of education. Specifically, this investigation sought to determine means, ranges and standard deviations for three groups of subjects: those 61 to 69 years of age, those 70 to 79 years of age, and those 80 years of age and above. In addition, correlations between verbal fluency score, and age, sex, years of education, and order of stimulus presentation were computed.

Post-Mazama Aboriginal Settlement/Subsistence Patterns : Upper Klamath Basin, Oregon, Frances Marie Philipek

Dissertations and Theses

A study was conducted in the Upper Klamath Basin, south-central Oregon, to test Luther s. Cressman' s hypothesis characterizing prehistoric Klamath Basin culture as having, from an early date, a marsh/riverine subsistence focus with long-term stability and a slow rate of internal change emphasizing intensification of the existing marsh/riverine utilization pattern. A subsistence/ settlement pattern model was developed to predict aboriginal site occurrence in the upper Klamath Basin.

Pragmatics: The Verbal Expression Of Feelings, Ann Paula Zimmerman

Dissertations and Theses

The purpose of this investigation was to determine at which age levels, between four and eight years, children express Praise, Apology, Commiseration, Blame, Challenge, Endearment, and both a Positive and Negative State.

Subjects were thirty children, six from each age level between four and eight years, selected from an elementary and preschool within the Portland area. Sixteen picture cards and stories were designed to elicit the eight different feelings. Each subject responded to questions at the end of the story and was given two chances to express the appropriate feeling. Each response was judged as appropriate or inappropriate and scored …

Speech Intelligibility As A Function Of The Propositionality Of Background Noise, Gail Swanstrom

Dissertations and Theses

The purpose of this investigation was to measure the ability of young normal hearing listeners to perceive speech in the presence of a background noise which varies in the relative intensity of its semantic content. The Speech Perception in Noise test was mixed with a two-component competing noise complex in which the narrative-to- speech noise ratio varied in 2 dB increments from -2 dB Na/SpN to +8 dB Na/SpN. These stimuli were presented at an overall +8 dB signal-to-noise ratio to thirty young normal hearing adults through the soundfield system. The differences between the mean error scores and standard deviations …