Digital Commons Network^™

The Effects Of Methylphenidate On Resource Allocation In The Mental Processing Of Add Children, John R. Cook

Theses and Dissertations

The effect of Methylphenidate (MPH) on the short-term memory scanning of boys with Attention Deficit Disorder (ADD) was examined from the perspectives of a linear stages model and a capacity model of information processing. A total of 36, six- to ten-year-old boys participated in three age- and IQ-matched groups. The boys with ADD were selected on the basis of a clinical diagnosis, meeting DSM-III criteria on the SNAP and a score of 15 or more on the Abbreviated Conners Rating Scale (ACRS). They received treatment with placebo and methylphenidate (MPH) for three weeks each in a double-blind, single crossover procedure …

A Morphological Study Of Paracrine Interactions In The Anterior Pituitary Of Lactating Rats Using Immunogold Techniques, Maria K. Statton

Theses and Dissertations

One major function of prolactin in the female is the stimulation of mammary gland development for lactation. It is well established in the rat that during periods of lactation, when serum prolactin levels are high, there is a suppression of the serum luteinizing hormone level. Prolactin has also been shown to inhibit the postcastration rise in serum luteinizing hormone in rats. Work addressing the question of site and mechanism of action of the inhibition of gonadotropin secretion by prolactin has focused on the relationship between the hypothalamus and the pituitary, and the relationship between the different cell types in the …

Exiles From Spain's Civil War: Case Studies Of Two Literary Figures, Olga Colbert

Theses and Dissertations

The Spanish civil war and the political regime that resulted from it deprived Spain of the presence and immediate inspiration of a large group of remarkably creative individuals. Some of the best minds of a literary generation left their country to protest the political situation and to continue to be true to their inner voices. Besides numerous personal and professional adjustments, hese people were faced with a tremendous sense of uprooting hat inevitably accompanies the experience of exile.

Only a minority among those exiles settled in the nited States, due to isolationist policies and to stringent minigration legislation. Those who …

The Interactive Effects Of Caffeine And Estrogen On Memory For Word Lists, Mary Ellen Arnold

Theses and Dissertations

Previous research has yielded conflicting results regarding the effects of caffeine on word list recall. Erikson et al. (1985) found that caffeine impaired recall among females when words were presented at a slow rate. Arnold et al. (1988) observed a facilitory effect of caffeine on the recall, after practice, of females tested during Days 1-5 of the menstrual cycle. Research on cognitive task performance among females suggests that performance varies according to the phase of menstrual cycle. Medical research demonstrates a relationship between estrogen and caffeine metabolism. In this study, it was hypothesized that females' recall of word lists would …

The Effects Of Alcohol On Semantic Memory, Norman A. Kerbel

Theses and Dissertations

Previous studies have shown that the effects of alcoholic intoxication on memory result from a functional decrease in capacity of working memory (e.g., Petros, Kerbel, Beckwith, Sacks, & Sarafolean, 1985). However, other studies looking at speeds of retrieval of information from long-term memory have brought this conclusion into doubt (Moskowitz & Roth, 1971). The present study presented subjects with decisions to be made regarding word pairs. Three conditions were used, each requiring different amounts of information to be accessed from long-term memory.

Sixty-six male college students, between the ages of 21 and 29 years, were divided into two groups. One …

An In Vitro Analysis Of Melanoma Cell Attachment To Isolated Glomerular Basement Membranes., Ronald K. Jyring

Theses and Dissertations

Penetration of blood vessel basement membranes (BMs) by metastatic cells apparently proceeds by a three step process involving attachment, degradation, and migration. In the current study, isolated glomerular BMs (GBMs) were used as model substrates for studying cell attachment to BMs.Murine and bovine gomeruli were isolated by differential sieving of homogenized renal tissues. GBMs were prepared by treating glomeruli with detergents and enzymes. This was facilitated by using "sieving chambers" which prevented tissue loss during the detergent extraction procedure. The ultrastructure of detergent isolated murine and bovine GBMs was similar to other species, although they had a greater tendency to …

The Writing Processes Of Theodore Taylor And Jane Yolen, Jean Myers Stevenson

Theses and Dissertations

This study is a description of the writing processes of two professional writers for children and young adults, Theodore Taylor and Jane Yolen. Theories concerning the writing process and implications for classroom use, as expressed by Cowley, Smith, Murray, Flower and Hayes, Graves, and Calkins, are the basis for an examination of the working papers for Taylor's The Cay and Rocket Island and Yolen's The Bird of Time and The Sultan's Perfect Tree which have been donated to the Kerlan Collection at the University of Minnesota.

The working papers include notes, drafts, revisions, galley and foundry proofs, and correspondence, although …

Expert System For Interpreting An Organizational Climate Survey Supporting Guided Development, Thabet Birro

Theses and Dissertations

This project has lead to the development of a prototype, diagnostic, rule-based expert system to analyze data gathered with an organizational climate survey conducted in high technology firms. The development process followed an investigative look at the field of expert systems. The project was implemented using Level5 shell (by Level 5 research Inc.) in PC/MS-DOS environment.

The Interaction Of Multifunctional Glucose-6-Phosphatase With Select Metabolites., Brian Lee Robbins

Theses and Dissertations

Glucose-6-phosphatase (EC 3.1.3.9) occupies a strategic metabolic location in hepatic glucose metabolism, is multifunctional in nature, consists of multiple components, and exhibits unique kinetic characteristics. These properties of glucose-6-phosphatase make it a likely candidate for regulation of glucose metabolism.The effect of selected intermediate metabolites on the phosphotransferase and phosphohydrolase activities of glucose-6-phosphatase was investigated with intact and detergent-disrupted microsomal preparations. Detergent treatment exposed the catalytic unit of microsomal preparations. The interaction of the metabolite with the catalytic unit was assessed in these preparations. The study of metabolites with the glucose-6-phosphatase of intact microsomes served to characterize the interactions of the …

Synthesis Of Modified Nucleotides To Incorporate Into Oligonucleotides., Jeffrey Allan Jenson

Theses and Dissertations

The use of modified analogs of 2$\sp\prime$-deoxyuridine as probes that incorporate into oligonucleotides are discussed. These probes can be useful in many areas including diagnostics, sequencing and therapeutics, and will be discussed later in more detail.The development of DNA probes is important in the diagnostic area because the use of the probes can diminish dramatically the time needed to diagnose an infection (from weeks to hours). Use of DNA probes for sequencing the genomes of hereditary diseases can help find cures. Fighting infectious disease by blocking replication of the virus using DNA probes is a therapeutic use. These are only …

Edith Irvine: Her Life And Photography, Wilma Marie Plunkett

Theses and Dissertations

ln mid-1988, Brigham Young University received a high-quality collection of photographic glass plates made by Edith Irvine at the tum of the century. The plates, her camera and other photographic equipment, and miscellaneous publications were donated to BYU by her nephew, Jim Irvine.

When the plates arrived and the Archives Photolab had them proofed, we realized thal not only were the San Francisco earthquake/ fire and other areas of California history recorded, but we had, in fact, the work of an outstanding photographer. As we compared the proofs with the work of other photographers who handled similar subjects, we called …

Ecology Of Gray Partridge In North Dakota, John Patrick Carroll

Theses and Dissertations

I studied gray partridge (Perdix perdix) ecology in north-central North Dakota during 1985-87. The primary goals of this study were to identify habitats important to gray partridge survival and nesting, and to provide baseline data on partridge ecology in North Dakota. I captured and radio-tagged 100 gray partridge, mainly during winter. Individuals were tracked by a vehicle-mounted telemetry system until August of each year. Home ranges, movements, habitat use, and survival were calculated by using the telemetry locations. Winter home ranges averaged 117 ha, and were larger than previously reported in North America. Important habitats used by radio-tagged partridge during …

The Primary Cell Culture, Morphological Characterization, And Analysis Of Proliferative Potential Of Ventricular Myocytes From The Adult Newt, Notophthalmus Viridescens., John Michael Tate

Theses and Dissertations

Previous work has demonstrated that adult newt myocytes possess a proliferative ability in response to an experimentally-induced injury, in vivo. The work outlined in this study has been an effort to develop an additional in vitro model to study proliferative events in the adult cardiac myocyte.Ventricles were minced and then enzymatically dissociated in a Ca$\sp{++}$ and Mg$\sp{++}$-free salt solution containing 0.5% trypsin and 625 U/ml of CLS II collagenase for 8 to 10 hours at 25$\sp\circ$C. Enzyme digests were preplated and then cultured in either serum-free or serum-supplemented modified Liebovitz's medium for up to 30 days.Light and transmission electron microscopic …

Identification And Characterization Of Ixodid Tick Antigens Involved In Acquired Host Resistance To Infestation., Valeria Mildred Howard Papes

Theses and Dissertations

Cattle and laboratory animals display acquired immunologically based resistance to ixodid tick feeding. Antibody, cell mediated, and complement dependent effector mechanisms are involved in this immunological response. The current study was concerned with the isolation and characterization of ixodid tick molecules involved in the host immune response to infestation.Ixodid ova extracts were fractionated by membrane ultrafiltration and Sephadex G 200 gel permeation chromatography. The whole ova extract and defined molecular weight fractions obtained were analyzed for their ability to interact with immune effector elements of tick resistant hosts.Amblyomma americanum whole ova extract induced both immediate and delayed skin hypersensitivity in …

The Relationship Between Trait Anxiety And Organization In Memory., Doug Gene Heck

Theses and Dissertations

These two studies examined the influence of trait anxiety upon organization in memory. High and low trait-anxious subjects who were either high or low in verbal ability listened to tape-recorded word lists and prose passages at different levels of difficulty. Immediately after listening to each word list, the subjects were asked to orally recall all they could remember, while their written recall was used for the passages.The results revealed no trait anxiety effects, with the exception of high trait anxiety being associated with greater total recall of words. A weak positive correlation existed between trait anxiety and total recall in …

Verbal Memory Changes In Elderly Nursing Home Residents With Suspected Senile Dementia Of The Alzheimer's Type., Scott Mark Bodine

Theses and Dissertations

Forty eight elderly subjects who were residents of nursing homes and retirement centers participated in the study which was designed to evaluate verbal memory functioning in presumed Senile Dementia of the Alzheimer's Type (SDAT). Half of the subjects exhibited significant decline in memory as evidenced by raw scores of 50 or below on the Wechsler Memory Scale. Declines in memory were not attributable to depression, cerebrovascular accident, alcohol abuse or severe mental disorders. The demented group performed lower than the group with intact memory on a measure of verbal ability. The memory tasks employed were free recall of word lists, …

Stress Reduction In Dental Students., Jacqueline Kush Turek

Theses and Dissertations

The current research was designed to compare effectiveness of two widely used stress reduction methods, Progressive Relaxation Training (PRT) and Stress Inoculation Training (SIT). The entire Fall 1987, freshman class of Creighton University School of Dentistry participated (N =.68). Fifty-eight Subjects completed the project. Students were randomly assigned to a treatment, PRT (N = 12) or SIT (N = 17), or to one of two control groups, placebo (N = 13), or no treatment (N = 16). The placebo consisted of a once-only lecture on theory of stress. All subjects were measured for stress related components using paper and pencil …

The Development And Failure Of Historic Agricultural Communities Of Utah: A Case Study Of Johns Valley, Utah, Wayne R. Shelley

Theses and Dissertations

Many agricultural communities have developed in Utah since the first settlement, but many no longer exist today. Some of these early communities experienced a "boom and bust," while others struggled for several years and were eventually abandoned. Johns Valley is a good example of these historic communities, as it experienced rapid growth and times of success and prosperity, yet it struggled and was eventually abandoned.
The situation in Johns Valley, from its early settlement to its demise, demonstrates the hope of the people who settled there and their efforts to make Johns Valley a productive and successful area. History also …

The Pilgrimage Phenomenon: An Analysis Of The Motivations Of Visitors To Temple Square, Jill W. Knapp

Theses and Dissertations

Pilgrimage to sacred places of religious meaning has taken place since the early days of mankind. In the last few decades pilgrimage travel has experienced a world-wide boom due to modern means of transportation. Though pilgrimage is most commonly referred to in the context of the major world religions (Hinduism, Buddhism, Judaism, Christianity, and Islam), there is some indication of pilgrimage-like travel among Mormons.

This thesis looks at Mormon pilgrimage behavior among Mormon visitors to Temple Square in Salt Lake City, Utah. The study undertaken has revealed considerable differences between Mormon and non-Mormon motivations, behavior and visiting patterns visitors to …

Characterization Of Glycolytic Enzyme Interactions With Microtubules And Subtilisin Treated Microtubules, Donna M. Carr

Theses and Dissertations

No abstract provided.

An Analysis Of Agressive Interactions Between Procambarus Spiculifer And Procambarus Versutus In Laboratory-Based Interspecific Contacts, Lyle A. Brasfield

Theses and Dissertations

The study was undertaken to investigate the role of competitive behavior in the distribution of the crayfish Procambarus spicullfer and Procambarus versutus. Forty pairs of animals, one of each species per pair, were matched by size and gender. For each pair, four fifteen minute agonistic encounters were observed under controlled laboratory conditions, and winners were determined using a scoring system developed by the author. P. versutus won 26 of 40 contests. Chi Square analysis revealed that this outcome deviated from an expected 50/50 ratio at the .942 significance level, suggesting support for the hypothesis that no difference exists in competitive …

The Effects Of Prenatal Vasopressin Administration On Memory In Rats, Robyn R. Swenson

Theses and Dissertations

No abstract provided.

Recovery Time After General Anesthesia In Ambulatory Surgical Patients Undergoing Laparoscopy : A Comparison Of Isoflurane And Alfentanil Infusion, Karyn B. Karp

Theses and Dissertations

No abstract provided.

Men Touching Men : An Exploration Of Male Touching Behavior, Michele Brual

Theses and Dissertations

No abstract provided.

Fibrositis : A Stress, Appraisal, And Coping Model, Sharon R. Brown

Theses and Dissertations

No abstract provided.

The Effects Of Perinatal Caffeine Exposure On The Memory Of Adult Rats, Kerri J. Lamberty

Theses and Dissertations

No abstract provided.

Clastogenic Effects Of The Organophosphorus Insecticide Phorate, Robert William Forgey

Theses and Dissertations

No abstract provided.

Clastogenic And Mutagenic Effects Of The Organophosphate Insecticide Chlorpyrifos In Cultured Human Lymphocytes, Mark Christopher Nelson

Theses and Dissertations

No abstract provided.

The Geography Of Tree Claims In Grand Forks County, North Dakota, James R. Schimmer

Theses and Dissertations

No abstract provided.

Clastogenic Effects Of The Insecticide Parathion On Cultured Human Lymphocytes, Scott Allan Goecke

Theses and Dissertations

No abstract provided.