Digital Commons Network^™

The Use Of Pure Cultures As A Means Of Understanding The Performance Of A Mixed Culture In The Biodegradation Of Phenol, Chirasakdi Varuntanya

Dissertations

In an effort to gain a more fundamental understanding of the performance of mixed microbial cultures in the biodegradation of toxic organic chemicals, studies have been conducted using three phenol degrading species isolated from a municipal treatment plant. The rate of phenol degradation was investigated for each of the three pure phenol degrading species, and various combinations of the three species. A simple competitive model was used to predict the behavior of the mixed cultures by using the pure culture Monod rate constants. The model fit the growth data for total biomass very well, although (as with the pure culture …

High Temperature Reactions Of 1,2-Dichloroethane With Water Vapor In A Tubular Reactor, Charles E. Anderson

Theses

This study examines the reaction of l,2-dichloroethane with water vapor. The linear-flow method is utilized, assuming plug flow without axial diffusion. Normal operation is at atmospheric pressure and the reactor is a quartz tube in a thermal region 45 cm in length. Two reactor diameters of 0.4 cm and l.05 cm are used. Water and l,2-dichloroethane enter the system in liquid phase via syringe pumps. After vaporizing in heated tubing, they are combined with argon, the reactor carrier gas. The molar ratio of water to l,2-dichloroethane is 55:l and varied residence times are achieved by changing the argon flowrate. Reactor …

Nutrition Profile Of Dietetic Technology Students: An Assessment Of Application Of Classroom Theory Learned., Perla Miranda-Kushida

Abraham S. Fischler College of Education ETD Archive

A unique advantage of being enrolled in the Dietetic Technology program at Malcom X College is that it provides the students with the knowledge of nutrition theory as part of their curriculum requirement for graduation. With this in mind, it was the hypothesis that these students will be practicing good nutritional habits for themselves besides being prepared for a career in this field. Because nutrition and health promotion have awakened a national consciousness at preventing illnesses, the Allied Health Department suggested that nutrition should be made part of the curriculum for all allied health students. However, the college administration, conscious …

Development Of Weekend Semesters In The Dietetic Technology - Nutrition Program At Malcolm X College For Chicago Full-Time Employees., Perla Miranda-Kushida

Abraham S. Fischler College of Education ETD Archive

The implications of enrollment decline at Malcom X College has created a dilemma and major economic concern to the college that it launched a college-wide marketing approach to attract new types of students in addition to high school graduates. Responding to this campaign, the Dietetic Technology-Nutrition program targeted the employees working full-time in hospitals and health care facilities’ dietary departments through a needs survey. The survey confirmed an overwhelming interest of employees in the program for weekend classes because of their working hours. Hence, the development of the weekend program to provide them with classes on Saturdays and Sundays of …

Elastic-Plastic Analysis Of Axisymmetrically Loaded Isotropic Circular And Annular Plates Undergoing Large Deflections, Aiman Raji Akileh

Dissertations and Theses

The concept of load analogy is used in the elastic and elastic-plastic analysis of isotropic circular and annular plates undergoing moderately large deflection. The effects of the nonlinear terms of lateral displacement and the plastic strains are considered as additional fictitious lateral loads, edge moments, and in-plane forces acting on the plate. The solution of an elastic or elastic-plastic Von Karman type plate is hence reduced to a set of two equivalent elastic plate problems with small displacements, namely, a plane problem in elasticity and a linear elastic plate bending problem. The method of finite element is employed to solve …

The Cognitive Learning Styles Of International Students, Shelley L. Smith

Dissertations and Theses

The purpose of this research was to examine the usefulness of David A. Kolb's Learning Styles Inventory (LSI) as a tool for categorization and analysis of systematic differences between American and International students. The research addressed five primary questions:

1. Are the learning styles of the International students tested different from those established by Kolb in previous studies of American students?

2. Do the learning styles of the International students tested differ among the various groups?

3. Are there differences among the groups of International students tested that can be related to gender?

4. Do the learning styles of the …

A Study Of The Application Of Paper Spread Function Data To The Prediction Of Physical Dot Areas For Offset Lithography, Paul Lewis

Theses

This investigation was aimed at establishing a relationship between the optical spread function of four common printing stocks (cast coat, enamel gloss, enamel dull and ledger) and a Yule - Neilsen n value in predicting physical dot Area, for offset lithographic printing. Using an offset press each paper stock was printed with a test target containing common screen frequencies at percent dot areas from 5-90"/. and solid ink patches adjacent to each tint. Using planimetry and macrodensitometry, exact n values were calculated for comparison with the measured spread function of that same paper stock. No relationship between the optical spread …

Prestartle Stimulus And Interstimulus Interval Effects Upon Startle Response Modification In Man, Humphrey Minx

Electronic Theses & Dissertations

An investigation was conducted to study the effects of interstimulus interval upon the startle response of eighteen male subjects. Four treatments were used, each consisting of a pre-startle sound and a startle eliciting sound, with an interstimulus interval of 0, 40, 120, or 1000 milliseconds. A treatment consisting of only the startle eliciting stimulus was used as a control.

Electromyography and pulse rate were monitored to record the response to the stimuli. Each subject was tested twice over a two week period, with a week separating the two tests.

Analysis of the electromyogram indicates that a significant difference (F= 21.82) …

The Behavioral Ecology Of The Cooperatively Breeding Harris' Hawk In Southeastern New Mexico, James Cary Bednarz

Biology ETDs

I describe the breeding pattern and system of the Harris' Hawk (Perebuteo unicinctus) and test several hypotheses that have been proposed to explain avian cooperative breeding systems. Individual Harris' Hawks were color-marked and monitored for a 40-month period in southeastern New Mexico. Between 29% and 70% of Harris' Hawk social units made a second breeding attempt in either late summer or autumn within each year, often following successful spring breeding. Clutches were initiated between 17 February and 1 November. The interbrood period was positively correlated with the size of the first brood. The number of second nests initiated was correlated …

The Effect Of Feedback On Low-Goal Task Performance, Jeffrey David Klawsky

Student Work

This experiment was conducted to study the effect of feedback on task performance under a low performance standard (goal). Fifty-two undergraduate students were presented with the task of mentally summing seven single-digit numbers to solve a problem. Subjects either received a high or low goal for the number of problems to solve in 15 minutes, and continuous feedback or no feedback about how many problems they had solved. It was predicted that feedback would result in higher performance for high goal subjects and lower performance for low goal subjects. A marginal main effect of goal difficulty (p<.067) in the predicted direction was obtained, but no goal difficulty-feedback interaction. Possible explanations for the observed results are discussed along with implications for future research.

Roberts' Apperception Test For Children: Referred And Nonreferred Student Profiles, Evelyn Harm Headen

Student Work

The present study examined a recently published projective test, the Roberts Apperception Test for Children (RATC; McArthur & Roberts, 1982). The subjects were 58 students, grades 1-8, from a midwestern suburban school district. One-half of the students had been referred to the school psychologist for an evaluation, either because of behavioral problems or a suspected learning disability, or for routine three-year reevaluations (as required by law). The second group of students were randomly drawn except for the stipulation that they not have been previously referred for a psychological evaluation. All subjects were given the RATC; in addition, the majority of …

Coverage Of Business News In Time Magazine 1974-1975 Vs. 1984-1985., Lynn Phares

Student Work

The relationship between the media and the business community is complex. On the one hand, business depends on the media to reach the public. On the other hand, many member of the business community view the media with suspicion, questioning both its objectivity and its methods. Many members of the business community also question the media's understanding of --- and therefore competence to report on --- business issues.

Developing A Profile Of Factors Associated With Excellent Students At Metropolitan Technical Community College, Ann Rosenblatt

Student Work

The excellent student at the community college level has personal characteristics which are related to success. The institutional goals and characteristics of the community college are interrelated to the goals of successful students. Studies of four-year institutions have found that from 30 to 50 percent of students who enter college do not finish their programs in the prescribed time frame.

Nonlinear Consciousness In Selected Feminist Plays: Strategies For Survival, Caren Carr

Student Work

This is a guide to survival in a hostile environment. The hostile environment is the patriarchy, the tools for survival are new conceptual patterns, and a guide to their use is found within the works of feminist playwrights. At the core of feminist thought is the mandate to change our way of thinking. The feminist point of view holds that the patriarchy is dangerous, not just to women, or feminists, but to the planet, and one of the fundamentals of the patriarchy is a rational, logical, linear, consciousness. In order to change this environment, feminists assert, a change in consciousness …

The Effects Of Acculturation And Age On Spiritual Well-Being Among Ethnic Chinese Church-Goers, Stephen T.C. Jang

Doctor of Psychology (PsyD)

This research investigated the effects of acculturation and age on Spiritual Well-Being among ethnic Chinese church-goers. Subjects consisted of 169 ethnic Chinese church-goers and English readers ages 18 - 55 from four Chinese churches in the Northwest United States. The response rate was 93.9% of the 180 initially selected subjects.

The subjects completed a survey questionnaire that included demographic information, background information, and the Spiritual Well-Being Scale (SWB). The SWB consisted of two subscales: the Religious Well-Being (RWB) Scale and the Existential Well-Being (EWB) Scale.

born had significantly greater (_E.<.05) EWB than subjects who had lived in the U.S. 5 years or less. Age was significantly related to SWB and EWB; and subjects 26 years old or above had significantly higher SWB and EWB scores than subjects 18 - 25 years old.

Religious commitment, and importance of religion were related to greater …

Embryo Induction And Plant Regeneration From Cultured Anthers And Pistils Of Orchardgrass (Dactylis Glomerata), David D. Songstad

Doctoral Dissertations

Direct embryogenesis was observed from Dactylis glomerata L. [orchardgrass (2N=4X=28)] anthers incubated at 25 C for 6 weeks on Schenk and Hildebrandt (SH) medium containing 3% sucrose and 30 pM dicamba [SH-30 (3,6 dichloro-o-anisic acid)]. Subsequent experi-ments showed that SH-30 supplemented with up to 5.0 g/1 casein hydro- lysate did not affect and 0.1 to 5.0 mg/1 benzylaminopurine or kinetin hindered the embryogenic response. Furthermore, anther orientation had no significant effect on the embryogenic response and no embryos were obtained from culture of isolated microspores. However, SH-30 containing 94 sucrose promoted embryogenesis and an anther density of 10/ml initiated more …

The Effects Of Aquatic Exercise On Self-Concept In The Elderly, Ok Chon Allison

MSN Research Projects

This quasi-experimental research study examined the effects of the aquatic exercise on self-concept in the elderly. The researcher hypothesized that there would be no significant difference in self-concept between elders who participated in an aquatic exercise program and elders who did not participate. A researcher-designed demographic data form and the Tennessee Self Concept Scale were used to collect pertinent data. A total of 22 subjects from two cities 30 miles apart participated in the study. Ten white female subjects were in the experimental group and 9 white and 3 black females were in the control group. The total positive self-concept …

Mud And Bluebells, Rebecca L. Bailey

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Arts and Sciences at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Arts by Rebecca L. Bailey in December of 1986.

The Effects Of Molecular Weight And Degree Of Substitution Of Cationic Starch On The Sizing Efficiency Of Alkenyl Succinic Anhydride, George T. Nebel

Paper Engineering Senior Theses

Alkenyl Succinic Anhydride (ASA) is a cellulose reactive size used in neutral to alkaline papermaking. Since ASA exists as an oil at room temperature, it must be emulsified in cationic starch to make it compatible with the aqueous wet and environment.

The advantages of using a cationic starch in an ASA sizing system include improved retention of fines, filler, and size; improved sizing efficiency; and improved strength. Mill and laboratory experience has shown, however, that cationic potato starch is superior to corn starch. Their are two main differences between potato starch and corn starch: (1) potato starch typically has a …

An Analysis Of Faculty And Administrator Perceptions Of Faculty Involvement In Decision-Making In The University Of Kentucky Community College System, W B. Ayers

Electronic Theses and Dissertations

The problem of this study was to determine if there is a significant difference between expressed perceptions of selected community college faculty and administrators concerning the extent to which faculty "actually are" involved in decision making and the extent to which they "ought to be" involved in decision making. This was a descriptive study, which utilized a survey methodology. Faculty and administrator perceptions were studied in six decisional areas: appointment, promotion and tenure decisions, academic decisions, administration, student affairs and advisement, system/state control, and general (overall faculty involvement). The study was conducted in the University of Kentucky Community College System, …

The Systematic Study Of Corrosion And Oxygen Control By Chemical Scavenging Agents, Robert Lee Hays

Masters Theses and Doctoral Dissertations

Corrosion of metal components in electrical power generation boilers is a serious and expensive problem that is a major concern to manufacturers and electrical utility personnel. Lost production and large costs associated with component failures have created a tremendous research effort to help minimize corrosive attack. One particular area that has received considerable attention is control of dissolved oxygen concentrations in operational and idle boiler systems. Numerous products and treatment schemes have been developed that have provided reliable means to help reduce corrosion due to dissolved oxygen attack. An unanswered question, however, is to what degree these treatment methods control …

Effect Of Phenolic Compounds On The Adenosine Triphosphatase Of The Membrane Of Staphylococcus Aureus, Emilia Rico-Munoz

Doctoral Dissertations

Butylated hydroxyanisole (BHA) and tertiary butylhydroquinone (TBHQ) were found to be effective inhibitors of the growth of Staphylococcus aureus. The minimum inhibitory concentrations (MIC) were 150 ppm BHA and 25 ppm TBHQ for the four strains tested. When the strains were grown in 250 ppm BHA, strain LP was found to be more resistant than the other three strains studied. Therefore, strain LP was chosen as the more resistant strain and strain A100 as the more sensitive one for the ATPase activity studies. Cytoplasmic membranes of late-exponential phase cells of both strains were isolated after digestion of the cell wall …

A Hydrogeologic Investigation Of The Balkema Wetland, Daniel V. Fronczek

Masters Theses

The Balkema wetland, located In southwestern Kalamazoo County, Michigan, represents complex biological and hydrologic Interaction between surface water and a two-aquifer hydrologic system. Situated on the southeastern flank of the Kalamazoo moraine, the glacial geology of the area plays a key role in the understanding of the hydrogeologic function of the wetland. A two-aquifer system, an upper unconfined, and a lower confined, Interact In the vicin ity of the wetland where the c la y /till aqulclude dividing the two systems 1s absent. Various parameters, both hydrologic and geochemical, were measured In the study area, Including specific conductance values of …

A Time-Management Procedure For Helping Graduate Students Accomplish Academic Tasks, Yousef Abdulwahab Abuhmaidan

Masters Theses

The purpose of this study was to investigate the effect of time-management and a task checklist on task completion, the amount of study time and students' grade point average (GPA). A package consisting of a time-management calendar and a task checklist was provided to five Jordanian students. A multiple-baseline across subjects design was used. Individual weekly meetings were conducted to assess the progress of the students on the use of the time-management calendar and task checklist. Students were asked to bring proof of accomplishments for the completed tasks. During the study the completion of tasks went from 64.6% to 92.2% …

Identification And Analysis Of Ichthyofaunal Remains From Late Pleistocene-Holocene Deposits Of Cheek Bend Cave (40mu261), Maury County, Tennessee, William Clark Dickinson

Doctoral Dissertations

Knowledge of the character of the late Pleistocene-Holocene ichthyofauna of the middle Duck River was acquired as a result of identification and biostratigraphic analysis of numerous fish bone fragments from the well-stratified deposits of Cheek Bend Cave, a small rockshelter situated in the limestone bluffs along the Duck River in Maury County, Tennessee. Forty-five unequivocal fish taxa (representing 12 families) were identified, of which 25 taxa occurred in the Late Wisconsin strata, 33 in Holocene strata, and 13 in both depositional sequences. Fifteen of the Late Wisconsin taxa and 18 Holocene taxa appear to represent initial records for these periods, …

A Cost And Performance Analysis Of The Three Electronic Communication Systems Currently In Use In The Printing And Publishing Industry, Susan Richards

Theses

This study describes and evaluates the three electronic graphic communication systems presently used by the printing and publishing industry. The author has selected generic system names for each of the systems. These are: System 1: Page Facsimile System 2: Character-Encoding System 3: Pixel Density-Map Page Facsimile systems are primarily used by newspaper publishers. The Character-Encoding and Pixel Density-Map systems are alternate methods primarily used by newsweekly magazine publishers. All three communication systems offer the user a means of transmitting editorial, and in some cases advertising pages, to remote printing facilities for manufacturing and distribution. Each electronic graphic communication system is …

Video Display Terminals And Psychological Stress: A Study Of The Acclimation Process, Walker Michael Parmelee

Dissertations

The acclimation process that employees of a large manufacturing company underwent after the introduction of video display terminals (VDTs) to the workplace was studied. In an attempt to understand the acclimation process, employees' mood states, perceptions of the work setting and their reactions toward the VDTs were assessed. This study followed secretaries (N = 11) through the initial phases of converting from a traditional to an automated office. The subjects were observed four weeks prior to and eight weeks after the introduction of VDTs. The secretaries' stress levels were monitored by the Profile of Mood States. The secretaries' perceptions of …

Selenium-Induced Enhancement Of Hematoporphyrin Derivative Phototoxicity In Murine Bladder Tumor Cells, Jeffrey M. Tosk

Loma Linda University Electronic Theses, Dissertations & Projects

The phototoxicity of hematoporphyrin derivative (Hpd) to murine bladder tumor (MBT-2) cells was studied in vitro. It was observed that selenium in the form of sodium selenite enhanced Hpd-sensitized photodamage in MBT-2 cells under conditions where the selenite alone was non-toxic. Sodium selenite was found to enhance the fluorescence emission of Hpd and augment the Hpd-sensitized photooxidation of tryptophan. The data indicate that sodium selenite is able to disaggregate Hpd, thereby enhancing Hpd-sensitized phototoxicity.

Late Pleistocene Sciurids From Kokoweef Cave, H. Thomas Goodwin

Loma Linda University Electronic Theses, Dissertations & Projects

Three local (Tamias panamintinus, Ammospermophilus leucurus and Spermophilus variegatus) and five extralocal (Tamias minimus, Tamias palmeri, Marmota flaviventris, Spermophilus townsendii, and Spermophilus lateralis) sciurid species (Sciuridae) were identified from the late Pleistocene-early Holocene Kokoweef Cave paleofauna. This fauna was the first documentation of T. minimus, T. palmeri and S. townsendii from the Pleistocene of the Mohave Desert. The 30-ft sedimentary sequence apparently recorded the mid-to late-Wisconsian introduction of S. lateralis into the Kokweef fauna but otherwise documented general taxonomic stability. The ecological diversity of the fauna was consistent with--but did not require--the hypothesis of more equable late Pleistocene climates, and …

Robotic Work Cell For Packing Canisters, Robert J. Makar

Theses

The purpose of this project is to reduce the manufacturing cost of the special order 2500cc truck canisters produced at Rochester Products' Lee Road facility. This was accomplished by designing and developing a robotic work cell to pack the canisters into baskets at the injection mold machine. A literature search was conducted to gain a broader understanding of robotic applications and end-effector design. In developing this cell, the layout of the work cell components was determined, a suitable robot was selected, and an end-effector was designed, built and tested.