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The Effects Of Para-Chlorophenylalanine On A Conditioned Emotional Response In Rats, Roy J. Hartmann

Theses & Dissertations

The initial intent of this study was to investigate p-CPA's actions on conditioned "anxiety" (CER) in rats in order to ascertain whether the derived effects were qualitatively similar to those previously reported for "conflict" behavior. Specifically, the goals of this study were to determine if p-CPA would reinstate lever-pressing behavior that had been suppressed by a series of tone-shock pairings. If a change in behavior did occur, would the reintroduction of serotonin, through the use of 5-HTP, return the behavior to pre-drug control levels.

The Effects Of Zeta Potential And Flocculant Molecular Chain Length On The Flocculation Of Fines, Kai F. Chiu

Paper Engineering Senior Theses

The factors controlling floc formation and cohesion are discussed in terms of fiber entanglement, electrokinetic potential and fiber-polymer bridging. The methods of measurement of zeta potential and degree of flocculation are also considered. In addition, an experiment is designed to relate zeta potential, molecular weight of synthetic polymers and the degree of flocculation of fines.

It is found that fiber length is the most predominant factor controlling flocculation. The bridging effect of polymer comes next. The higher the molecular weight, the greater the degree of flocculation. The electrokinetic potential effect is only influential if simple electrolytes are used as flocculant …

A Comparison Of Fiber Orientation On Fourdrinier And Verti-Forma Paper Machines Using The Instron Tensile Tester, Paul J. Kiffe

Paper Engineering Senior Theses

Many of the fundamental sheet properties are inter-related with the fiber orientation of the sheet. Until recently, this sheet was made of a Fourdrinier machine and the relationships were thoroughly studied. The advent of the Verti-Forma has opened up a new field of study. The objective of this thesis was to compare the fiber orientation in the two-wire Verti-Forma with the conventional Fourdrinier using the Instron tensile tester.

Test samples were acquired from the pilot Fourdrinier at Western Michigan University, a Fourdrinier at Allied Paper Company, and the Verti-Forms also at Allied. Full and split sheet halves were tested for …

The Application Of Stress-Strain Analysis In Routine Control, Richard L. Memmer

Paper Engineering Senior Theses

Many of the empirical strength tests used for determining end use performance of a paper sheet do not give a true indication of actual sheet properties and performance. The empirical tests of burst, tear, and folding endurance were made on eighteen paper samples of different grades of papers. The fundamental tests of tensile strength, elongation, and tensile energy absorption were also made on the same samples using a stress-strain tester. The fundamental tests were used in showing deficiencies and discrepancies in the empirical test values.

The discrepancies found indicated a need for increased fundamental testing to be use in predicting …

The Effects Of Ph On Cationic Agents To Increase The Efficiency Of Tio2 In Paper, Stanley L. Oakleaf

Paper Engineering Senior Theses

The effect of pH on the efficiency of the cationic agents, Kymene 557 (Epichlorohydrin) and Tydex (Polyethylenimine), was studied, and the efficiencies of the two cationic agents were compared.

The pH at which cationic agents are most effective, considering percent retention of titanium dioxide, is pH 5.7 at the time of titanium dioxide slurry addition. The pH for optimum opacity in a sheet is pH 6.0.

A pH that is controlled by alum, rather than independently of alum, produces higher titanium dioxide retentions and opacities. Maximum efficiency is not controlled by pH alone. An alum loading of about 3.5% should …

Turbidity Reductions By Enzymatic Hydrolysis, John Nowak

Paper Engineering Senior Theses

Turbidity has long been a problem to the paper industry. In the past, it has been mainly associated with secondary fiber mills, among others. However, with the recent increase in the price of virgin pulp, other mills are seriously considering secondary fiber as a substitute for virgin pulp. Therefore, turbidity may become a problem to a larger number of mills in the future. Turbidity arises when starch and a filler are sheared together in a system. It has been noted in the literature that hypochlorite-oxidized starch produces the greatest turbidity phenomenon.

This project assumed that the size of the starch …

The Site Of Absorption Of Xanthophylls And Factors Affecting Pigmentation Of Chickens, Egg Yolks, And Products Made From Egg Yolks, Lloyd Henry Littlefield

Doctoral Dissertations

A total of four experiments were conducted to determine the location of the site of absorption of xanthophylls, to determine the relationship of egg yolk color produced by various feed xanthophylls to the color of mayonnaise, and to study the effect of the level of dietary cow manure, age, ambient temperature and feed consumption of xanthophyll pigmentation of hens and egg yolks.

Increases in the level of blood xanthophylls and visual pigmentation of xanthophyll depleted hens were used to measure the absorption of xanthophylls. Surgical removal of either the duodenum, jejunum, ileum or large intestine resulted in a slight but …

Moisture And Microwave Effects On Selected Characteristics Of Turkey Pectoral Muscles, Georgia Mae Williams

Masters Theses

The effect of added water and microwave heating on several characteristics of ground composites of pectoral muscles of eight USDA Grade A turkey toms was investigated. Samples (200 g) containing 0, 15, or 30 ml added water were prepared and heated in a Raytheon Mark IV Radarange (2450 MHz) for 0, 70, and 130 sec. Water added in the amounts of 15 or 30 ml represented 7 or 13% of the sample weight prior to heating.

Expressible moisture index and total moisture decreased with increased cooking times, whereas fat-free dry weight and initial and total cooking losses increased with cooking. …

Training And Employment Needs Of Food Service Personnel In West Tennessee Hospitals, Carole Elizabeth Wilson

Masters Theses

The study of training and employment needs of food service personnel in 15 selected West Tennessee hospitals was accomplished by means of two questionnaires completed during personal interviews with hospital administrators and food service managers of hospitals in two groups by size. Specific weaknesses in the training of food service employees were noted. Hospital administrators reported inadequately trained employees as one of their major problems, and foodservice managers stated that lack of education and training was a major problem in the procurement of food service personnel. Other problems that administrators and feed service managers mentioned frequently regarding food service employees …

Purification And Properties Of Dna Polymerase From Bacillus Licheniformis And Bacillus Stearothermophilus, Bruce A. Roe

Dissertations

No abstract provided.

An Evaluation Of Student Attitudes In The Audio-Tutorial Biological Science Program At Western Michigan University And How They Are Reflected In Student Achievement Versus Time Spent In Laboratory, Dorothy Anne Hackett

Masters Theses

No abstract provided.

A Comparison Of Luteinizing Hormone And Prostaglandin F2 Α Stimulation Of Pseudo-Pregnant Rat Ovarian Steroidogenesis In Vitro, Ross R. Erickson

Masters Theses

No abstract provided.

The Application And Refinement Of Thin Layer Chromatographic Procedures In Analyzing The Ribonucleic Acids Present During The Morphological Development Of Two Varieties Of Avena Sativa L., Dorothy Anne Hackett

Masters Theses

No abstract provided.

Public Health Nutrition Experiences With The Louisiana State Department Of Health, Mamie Brown Davis

Masters Theses

This report describes and analyzes the observations and experiences of the student nutritionist during ten weeks of field training with the Nutrition Section in the Louisiana State Department of Health. The purpose of the training was to supplement academic training in public health nutrition at the University of Tennessee and the previous background of the student. The field experience was planned to increase her understanding of the function of the Institutional Nutrition Consultant as an integral part of the public health program in a state agency.

Information was obtained on the history, organization, and programs of the Louisiana State Department …

Nesting And Brooding Characteristics Of Sharp-Tailed Grouse (Pedioecetes Phasianellus Jamesi Lincoln) In Southwestern North Dakota, Carter Drew Christenson

Theses and Dissertations

A study of the nesting and brood habitat preferences of sharp-tailed grouse (Pedioecetes phasianellus jamesi Lincoln) was conducted in southwestern North Dakota during the reproductive seasons of 1969 and 1970. Radio telemetry was used to monitor the spring and summer activities of seventeen sharp-tail hens. Eight brooding hens were semi-continuously radio-tracked for movement and cover selection. A quantitative and qualitative analysis of seventeen nests and eight renests was made to determine the preferred nesting cover and the effects of intensive grazing upon it .. Nests were established either in non-use areas or in areas of light to moderate grazing. These …

Vegetation Of The Big South Fork Cumberland River, Kentucky And Tennessee, John Marcus Safley Jr.

Masters Theses

The water shed of the Big South Fork of the Cumberland River was studied in the summer of 1969 to determine the relationships existing between soil, site, and vegetational characteristics. Two­ hundred-and-seventy tenth acre plots were established where in trees of overstory size (greater than 5 inches dbh in 2 inch size classes) and under story size (4 1/2 feet tall; 1-5 inches dbh) were measured; herbs, shrubs, seedlings, and vines were sampled within one- hundredth acre subplots. Various soil and site characters were measured for each plot.

Soils were found to be stonier, deeper, and less sandy on lower …

Shear Values And Alkali Insoluble Collagen Of Beef Biceps Femoris As Affected By Time And Temperature Of Heating, Cynthia Anne Winstead

Masters Theses

The effect of heating beef cores at 55^o, 60^o, and 65^oC for 30, 60, and 120 minutes was studied. Cores were procured from three pairs of beef biceps femoris muscle from U. S. Choice steers. They were one inch in diameter and were heated in glass tubes in a thermostatically-controlled water bath. Tenderness was evaluated by Warner-Bratzler shear values. The residual alkali insoluble collagen was determined on composite samples of the sheared cores from each heat treatment. Heat treatments were replicated three times, once with each muscle pair.

Cores of muscle heated at 60 …

A Comparison Of Ecs And Drug Induced State-Dependent Learning, Mayse F. John

All Master's Theses

The purpose of the present experiment is twofold: (a) to determine if FS and ECS or just ECS can be used as an agent to produce "dissociated" learning in a multi-trial procedure, and (b) if shown, to determine the effectiveness of these agents relative to three different dosages of sodium pentobarbital preselected to produce no, moderate, and complete dissociation.

Variations In The Electrophoretic Mobility Of Purified Staphylocoagulase, John Elliott Hill

Biology ETDs

ABSTRACT

Coagulase production was investigated for 23 strains of Staphylococcus aureus. The coagulase from seven of these strains was purified and subjected to electrophoresis.

The dialyzable fraction of heart infusion broth was the growth medium. Coagulase was harvested from 5 hr shake cul­tures incubated at 37 c.

A series of dialysis steps lasting 24 hr at a tempera­ture of 2 C were used to purify the different coagulases. The crude coagulase was first separated from the growth med­ium by dialysis against deionized water. The coagulase was next precipitated by dialysis against a £H 3.8 acetate buf­fer which had an ionic …

A Taxonomic Comparison To Uta Stansburiana Of The Great Basin And The Upper Colorado River Basin In Utah, Lloyd C. Pack

Theses and Dissertations

The lack of a comparative study between the Uta stansburiana of the Great Basin and Upper Colorado River Basin, and the fact that several reptile species have developed distinct populations in the Upper Colorado River Basin prompted this study. Twenty-one external characteristics of these lizards were compared, including several which had not been previously used in the separation of Uta stansburiana into subspecies. All of the statistical data were obtained from preserved specimens. Twelve of the twenty-one characteristics show significant differences between the Great Basin and Upper Colorado River Basin populations. The characteristics of back pattern and throat color show …

Comparative Molt In Toxostoma Curvirostre And T. Bendirei, John L. Darling

Biology ETDs

Timing and pattern of molts were studied in two species of Southwestern thrashers, Toxostoma curvirostre and T. bendirei. Emphasis was placed upon description of the sequence of feather replacement. Adults of both species undergo a complete molt (the prebasic) following the breeding season. The pattern of molt is essentially the same in both species. However, the migratory T. bendirei completes the molt approximately one month earlier than T. curvirostre, which remains on or near the breeding grounds throughout the year. The molts of young birds of both species are also similar in pattern. A major difference is the telescoping of …

The Psychological Needs Of Hospital Dietary Supportive Personnel, Ralph Morales Jr.

Loma Linda University Electronic Theses, Dissertations & Projects

Achieving objectives in hospital food service systems is made more critical by the increasing rate of labor turnover. One of the major emphases that seems to offer promise for solving certain current manpower problems is a better understanding of the factors which may contribute to turnover. A quantitative approach to the identification of human needs in the work environment should provide information relevant to more effective planning and utilization of human resources.

The purpose of this research was to determine if by examining the psychological needs of hospital dietary supportive personnel, information could be derived for more objective management of …

The In Utero Development Of Mouse Embryos After Cultivation In Vitro From Two-Cell To Blastocyst In 17b - Estradiol Treated Medium, Harley J. Schneider Jr.

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead state University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Harley J. Schneider, Jr. on August 27, 1970.

A Flora From The Dakota Sandstone Formation Near Westwater, Grand County, Utah, Samuel R. Rushforth

Theses and Dissertations

A cretaceous (Cenomanian) flora from the Dakota Sandstone Formation near Westwater, Grand County, Utah contains an admixture of ferns and angiosperms. The ferns of this flora are representative of an older Jurassic-Wealden vegetational type, whereas the angiosperms are typical of the modern vegetational type. Species of Gleichenia and Matonidium and Astralopteris coloradica represent the dominant forms in this flora. The Westwater flora contains fourteen genera including nineteen species and one variety. New species described from this flora include Asplenium dakotensis, Coniopteris westwaterensis and Ilex serrata.

The Effect Of The Parasite Hymenolepis Diminuta On Iodine Economy In The Rat, David Gourdon Holmes

Theses and Dissertations

A balance of iodine within the rats is important for the maintenance of normal thyroid function. Because of Hymenolepis d[imi]nuta's affinity for certain nutrients, it may upset norma[l] iodine balance in the rat. To determine this, tapeworm-infected and non-infected rats were given 125Iodide orally and the percent uptake of iodide by the thyroid and the amount of radioac[tiv]ity in the tapeworms was determined. The percent distribution of the radio-iodinated compounds in the thyroid, tapeworms and feces was also determined. These procedures were repeated except 125Thyroxine was administered orally. There was a decrease in percent iod[id]e uptake by thyroids of tapeworm-infected …

Asexual Reproduction In Planaria Characteristics Of The Inhibitor(S), Linda Gail Sheffield

Theses and Dissertations

A study was made of the postulated fission-inhibiting substance located in the cephalic region of Dugesia dorotocephala. Rearing decapitated planaria in four different concentrations (25, 50, 75 or 100 ug/ml) of head or whole body extract resulted in a positive correlation between the inhibition of fission rate and the concentration of extract. The difference in inhibitory activity between the two types of extracts was three percent at maximum. The inhibitory substance was partially inactivated at 60° C. There was a direct correlation between the length of time that the extract was heated and the inactivation of inhibitor. The active substance …

The Influence Of Dietary Sulfate On The Excretion Of 35S-Cysteine Sulfur As 35S-Taurine Sulfur By The Rat, Betty Ann Whittle

Doctoral Dissertations

The relationship of dietary sulfate to the efficiency of feed utilization, excretion of ³⁵S-cysteine sulfur as ³⁵S-taurine sulfur, and sulfation of lung tissue by the rat was investigated.

The feed efficiencies of animals fed diets from weaning that contained 0.10 per cent of inorganic sulfate and 0.47 per cent of organic sulfur as sulfate were significantly higher at the end of a six-week feeding period than were those of littermates fed diets that contained higher or lower levels of inorganic sulfate but comparable levels of total sulfur as sulfate. These findings showed that equivalent levels of sulfur as …

Relation Of Phospholipids To Selected Tissue Components In Light And Dark Portions Of Porcine Semitendinosus Muscle, Marian Dianne Ruff

Doctoral Dissertations

The semitendinosus of pork contains a light and a dark portion that have physicochemical properties similar to those of uniformly white and red muscles, respectively. Although the two portions differ in metabolic activity they function as one muscle. The purpose of this study was to investigate the relation of phospholipid concentration to predominant fiber of the two portions of the porcine semitendinosus. The light and dark portions of the porcine semitendinosus were selected in order to minimize the possible effect of exercise on phospholipid content.

Phospholipids of the light and dark tissue of the porcine semitendinosus were studied in relation …

The Breeding Biology Of The Mountain Chickadee (Parus Gambeli), Donald Frederick Martin

All Master's Theses

The breeding biology of the Mountain Chickadee (Parus gambeli) was studied in 1968, 1969, 1970 in the Robinson Canyon, 13 miles west of Ellensburg, Kittitas County, Washington.

Dietary Findings And Bone Densities Of Preschoolchildren In Selected Day Care Centers In Knoxville, Tennessee, Sara Edmundson Cummings

Masters Theses

The purposes of this study were to determine the contribution the food eaten at day care centers made to the Recommended Dietary Allowances of preschool children; to evaluate their nutritional status using seven-day records of food intake and measurements of height, weight, and bone density; and to study the correlation between selected nutrients and bone density.

Children from four day care centers in Knoxville, Tennessee, were participants in this study. Permission for participation was obtained by the signed consent of the parents. Complete dietary information (school lunch records and seven-day home records) and physical measurements (height, weight, and bone density) …