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Some Morphological And Chemical Responses Of Blackbrush (Coleogyne Ramosissima) To Goat Browsing: Influences On Dietary Blackbrush Selection By Goats And Cattle, Frederick D. Provenza

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Domestic goats were used to modify the growth form of blackbrush, a spinescent shrub occurring in nearly monospecific stands on several million hectares of rangeland in the southwestern United States. The objective of this research was to evaluate goat browsing as a means of improving these rangelands for cattle. Winter goat browsing stimulated spring twig growth from basal and axillary buds which resulted in increased production.

Twig production by heavily browsed plants (>95 percent removal of current season's twigs) was a function of precipitation, soil depth, branch location on the plant, and period of rest after browsing. As precipitation …

Diversity And Production Of Herbaceous Vegetation In A Northern Utah Subalpine Chronosequence, Gary A. Reese

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Successional trends in herbaceous plant production and diversity were studied in an age sequence of sites, i.e. chronosequence, inferred to represent a meadow to aspen to fir to spruce-fir sere. Primary production was observed to decrease in a linear fashion with successional development. Three components of diversity; richness, heterogeneity, and equitability or evenness, each had low early successional values, reaching maximum diversity in mid-succession, and declining to intermediate levels with maturity. The magnitude of these trends varied greatly, depending on the methods used to determine plant dominance. Characteristics of various dominance indices and their applicability to this study were examined. …

Examination Of The Effect Of Physical Exercise On Metabolic Control In Type I Insulin-Dependent Youth With Diabetes Mellitus, Gayle Ann Brazzi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

There is evidence for the importance of physical exercise balanced with diet and insulin therapy in the treatment and control of Type I insulin-dependent diabetes mellitus. Recent attention in the literature has focused on the once neglected component of treatment--exercise. A well-controlled exercise state is generally believed to be beneficial for the individual with diabetes. Limited studies are available on the effect of exercise on long-term metabolic control. Before exercise levels can be professionally prescribed for a given population of youth with diabetes, current exercise patterns should be evaluated as to the effect on long-term metabolic control.

It is the …

An Investigation Of The Rework Defect In Process Cheese, Patricia Ramirez Baca

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effect of time that processed cheese was held ex- posed to heat alone or with agitation, the level of rework cheese, and the type and level of emulsifying salt were evaluated by determining finess of emulsion based on scanning electron microscopy measurements, meltability, and rheological measurements using a Universal Testing Machine.

Process cheese held in the cooker at 82°C for up to 4o minutes became less meltable and more firm and the emulsion became finer while that held at 82°C outside of the cooker without agitation was only slightly affected. Loss of meltability and increased firmness associated with pro-longed …

Effect Of Atmospheric Oxidation On Bioavailability Of Meat Iron And Liver Weights In Rats, Kathleen M. Cardon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Iron bioavailability of diets containing oxidized turkey and oxidized beef meat was investigated in two experiments. In both studies male, weanling rats were made anemic by consumption of a low iron diet and bleeding. The experimental diets were prepared so that meat was the only source of iron. Hemoglobin regeneration served as the basis for measuring iron utilization. In experiment 1, lyophilized, uncooked turkey meat was allowed to oxidize at 20-22°C for 0, 48, 96, 144, 216, or 264 hours and then fed to the rats. The length of oxidation time of the turkey meat did not significantly affect the …

Educating The Dietitian On Nutritional Counseling Principles In Diabetes Mellitus And Their Application For Adolescents With Insulin-Dependent Diabetes: Use Of A Learning Package, Eileen R. Deleeuw

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to develop and test a Learning Package on nutritional counseling principles in diabetes mellitus with specific application for adolescents with insulin-dependent diabetes. The Learning Package was designed to be used as continuing education material for the clinical dietitian. It consisted of two audio tapes, 2 1/2 hours in length, recorded by the author and an accompanying handbook or resourcebook. The resourcebook materials were designed to give further details, provide resources and materials for future reference, visually reinforce the audio presentation, summarize information given in the presentation, and give a bibliography of the references cited. …

Effect Of Toxaphene On Collagen Synthesis In Fish Tissue: Organ Culture Studies And Prolyl Hydroxylase Activity Assay, Charles Franklin Luke

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Toxaphene is reported to cause defects in the collagen of fish. Chronic exposure to toxhaphene weakens the backbone of fish by decreasing the amount of collagen and usually increasing the amount of calcium in the bone which results in a more brittle and fragile bone.

We investigated the possible direct action of toxaphene on collagen synthesis by exposing vertebral and swim bladder organ cultures obtained from unexposed rainbow trout (Salmo gairdneri) fingerlings to the same lot of toxaphene found to cause this defect in vivio. Collagen produced by these organ cultures was measured by: (1) total ^{3 …}

Models For Estimating Energy And Protein Utilization For Feeds, Muhammad Fadel Wardeh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Data on the proximate nutrient content of feedstuffs, digestibility and energy utilization available from the International Feedstuffs Institute (Utah State University) were used to develop mathematical models for estimating energy and protein utilization of five classes of feedstuffs for various kinds of animals.

Classes of feedstuffs were subdivided into more related subclasses. Furthermore, data from all feeds were pooled together then subgrouped into more related subgroups in an attempt to gain high precision in prediction of digestible proximate nutrients and TDN from a single chemical entity by the use of simple regression models (Y = bo + b₁x …

Locus Of Control: Effects On The Reported Gains Made In Assertion Training, Eugene Earl Campbell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forty-nine Cache Valley residents, between the ages of 18 and 45, who volunteered to participate in an assertion training class were assigned to one of seven groups. Subjects were administered pre- and posttests and a two month follow-up evaluation. Measures included Rotter's Internal-External Locus of Control Scale, the Rathus Assertive Scale, and the Berger Self-Acceptance Scale. The results obtained indicate that self-acceptance and assertiveness changed as a result of assertion training and that these changes were maintained at follow-up. No difference between internals and externals was observed as a result of semi-structured assertion training.

Biphenyl Hydroxylation By Vole Hepatic Microsomes, Moheb H. Makary

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Metabolism of biphenyl by meadow voles (Microtus montanus) liver microsomes was studied by gas liquid chromatography. The microsomal biphenyl hydroxylation of Swiss Webster mice (outbred) was also investigated to provide a species comparison. 4-hydroxybiphenyl (major metabolite), 3-hydroxy biphenyl (minor) and smaller amounts of 2-hydroxybiphenyl were identified as metabolites of biphenyl incubated with vole liver microsomes. Liver microsomes from Swiss mice formed 4-hydroxy biphenyl (major metabolite) and almost equal amounts of 2- and 3-hydroxy biphenyl (minor metabolite). The amount of the hydroxy biphenyls formed by vole liver microsomes was considerably less per milligram of microsomal protein than for mice. …

Simulated Use Of The Exponential Polynomial/Maximum Likelihood Technique In Developing Suitability Of Use Functions For Fish Habitat, Kenneth A. Voos

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to present a new methodology for producing fish habitat suitability at use functions. The suitability functions are relative measures of the voluntary or involuntary preference for combinations of the values of environmental attributes by a fish species and age class. This suitability function is used to determine the relative usability of a physical stream environment as fish habitat.

A generalized function form, exponential polynomials, was selected for the development of these suitability of use functions. The maximum likelihood technique was used for function parameter solution. Derivation of the suitability functions was simulated for several …

Mechanism Of Two Homogeneous Reactions; Co Self Exchange And N2 Self Exchange, Alan L. Rockwood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The two atom switching reactions referred to in the title were originally studied at temperatures greater than 2000°K in shock tubes by other investigators. For each reaction they proposed a direct four-center exchange mechanism in which one of the reactant molecules must be vibrationally excited, (the vibrational excitation mechanism or VEM). One of the predictions of the VEM is that molecules which are vibrationally hot but translationally cold should react through the four center transition state that leads to exchange.

Using a mercury photosensitization technique, it is shown in the present work that excitation of CO to high vibrational levels …

The Roles Of Mechanical Stress And Ethylene In Clinostat-Induced Leaf Epinasty And Gravitropic Response Of Dicot Shoots, Raymond M. Wheeler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Aminoethoxyvinyl glycine (AVG) and silver thiosulfate, antagonists of ethylene biosynthesis and action in plants, both delayed onset of leaf epinasty in Xanthium strumarium L. (cocklebur) plants rotated on horizontal clinostats. Xanthium plants mechanically stressed by continuous horizontal or vertical shaking, or continuous twisting back and forth, did not develop any significant epinasty, while plants inverted every 20 minutes (upside down half the time) did develop epinasty. From this it appears that clinostat-induced epinasty is a result of gravity compensation rather than mechanical stress.

Treatment of Xanthium, Lycopersicon esculentum Mill. (tomato), and Ricinus communis L. (castor bean) …

Explanation Of The Fast Fourier Transform And Some Applications, Alan Kazuo Endo

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This report describes the Fast Fourier Transform and some of its applications. It describes the continuous Fourier transform and some of its properties. Finally, it describes the Fast Fourier Transform and its applications to hurricane risk analysis, ocean wave analysis, and hydrology.

Investigations On The Great Northern Beans (Phaseolus Vulgaris L.): Protein Functionality, Antinutrients, Flatus Factors, Fermentation, And Carbohydrates, Shridhar K. Sathe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Protein content of the Great Northern beans was 26.10 percent on a dry weight basis. The apparent isoelectric pH of the NaCl extractable proteins was about 4.4. Among the several solubilizing agents, Na₂CO₃, K₂SO₄, sodium dodecyl sulfate (SDS), and NaOH at the respective concentrations of 0.5, 5.0, 5.0 (all w/v), and 0.02 N were the best protein solubilizing agents, solubilizing 93.6 grams Lowry protein per 100 grams Kjeldahl protein. AIbumins and globulins accounted for 21.18 and 73.40 percent, respectively, of the total bean proteins. The bean proteins were fractionated and protein concentrates …

The Effects Of Myoglobin, Nitrosylmyoglobin, And Free Iron On The Growth Of Clostridium Botulinum In Cured Meat, Susan K. Fortier Collinge

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Although nitrite is a known inhibitor of Clostridium botulinum in cured meats, the mechanism of inhibition is not understood. The observation has been made that iron is required for growth of C. botulinum and that the role of nitrite may be to alter the pathway of iron uptake by these organisms. Since the color change in cured meats is due to the binding of nitrite to the heme group of meat pigments, it was hypothesized that nitrite may also be tying up an essential iron source, heme. This experiment was an investigation of the possibility that myoglobin added to a …

Bioavailability Of Calcium, Fluoride And Iron In Mechanically-Deboned Beef Fed To Growing Rats, Kathryn Mclaughlin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Weanling rats were fed diets containing raw lyophylized hand-deboned shank beef (HDS) supplemented with CaCO₃, retorted lyophylized mechanically deboned shank beef (MDS), or raw lyophylized MDS. Ca in the latter two diets originated from bone during the mechanical deboning process. Ca absorption, Ca retention, bone weight, and bone breaking strength were similar for comparative dietary levels of Ca regardless of the source. Bone ash and Ca content was significantly higher (P < .05) in the MDS 393 (3.93 g Ca/kg diet) diet and in the retorted MDS 460 diet compared with the HDS 488 diet. Relative biological values for the MDS diets calculated relative to the HDS diets ranged from 102 to 132 when the linear regression of Ca consumed, Ca retained, or dietary Ca level vs bone ash or bone Ca content was obtained. The retorted MDS 460 diet contained the highest Fe level and exhibited a lower percent absorption, terminal hemoglobin level, and liver Fe storage. Humerus F content increased as dietary F (also present from bone) level increased. Dietary F level did not determine humerus breaking strength.

Comparison Of Skim Milk Starter, Whey Base Starter And A Direct Set Method On The Yield, Quality And Economics Of Cottage Cheese Production, Wayne G. Geilman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three different methods of acidifying skim milk(milk starter, whey base starter and direct acid set) for making cottage cheese were evaluated for their effect on yield, quality and acidification cost. Cultured cottage cheese was produced with milk starter and pH controlled whey-base starter by the short set method. Five percent milk starter and 2.4% whey base starter were approximately equivalent in activity and gave average setting times of 234 to 255 minutes. Direct acid set cottage cheese was made by the Vitex/American method. The setting time required for direct acid set cottage cheese was 158 minutes. Yields of cottage cheese …

An Enzyme-Linked Immunosorbent Assay (Elisa) For Pantothenate, Allen H. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An enzyme-linked immunosorbent assay (ELISA) for pantothenate has been developed. Antibodies induced in rabbits against bovine serum albumin-pantothenate conjugate were specifically purified by affinity chromatography. This process served to reduce the amount of endogenous pantothenate attached to the antibody, as well as to purify the antibody. The purified antibodies were covalently linked to alkaline phosphatase (Sigma type VII) with glutaraldehyde (0.05% aqueous solution). An immobilized pantothenate substrate was first obtained by attaching human serum albumin-pantothenate conjugate to the surface of polystyrene culture tubes by passive adsorption. The binding of the enzyme labelled antibody (E-AB) to this substrate is proportionately inhibited …

Vitamin A And Vitamin E Status Of Persons On Hemodialysis, Kathleen S. Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study was designed to assess the vitamin A and vitamin E status of persons receiving maintenance hemodialysis. Blood samples from thirty persons receiving hemodialysis, as well as age and sex-matched controls, were analyzed for vitamin A, vitamin E, and carotene using a spectrofluorometric assay for vitamins A and E, and a spectrophotometric assay for carotene. Dietary intakes of vitamins A and E were estimated via verbal questioning. Samples of dialysate were also studied. Results of the investigation showed significantly elevated vitamin A, normal vitamin E, and decreased carotene levels in persons with renal failure receiving maintenance hemodialysis, when compared …

Factors Affecting The Measurement Of Undenatured Whey Protein Nitrogen In Dried Whey By A Modified Harland-Ashworth Test, Reyad M. Aboumahmoud

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Harland-Ashworth test for measuring undenatured whey protein nitrogen in nonfat dry milk was modified to measure undenatured whey protein nitrogen in dried whey. The new test was designed to measure absorbance in Harland-Ashworth filtrates at 280 nm to eliminate difficulties associated with turbidimetric measurements. One gram dried whey was reconstituted in 25 ml pH 6.7 phosphate buffer (.1M) in a 25 x 150 mm test tube. Ten grams sodium chloride were added. The test tubes were incubated for 30 min in a water bath at 37C and shaken 8-10 times in the first 15 min. The tubes were removed …

The Effect Of Support Groups In Reducing Stresses During The Transition To Parenthood, Lynne Wilson Myers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forty-two couples expecting their first child volunteered to participate in a study of the transition to parenthood. Personal well-being, self-esteem, marital satisfaction, and parenting competence of the couples were assessed during pregnancy, and then again when babies were six weeks and fifteen weeks old. Parents were asked to report how much support they had received from their doctors, churches, family, and friends, and other sources, after their baby was born. Personal well-being and parenting competence increased for women after they became mothers. Personal well-being decreased and parenting competence increased for new fathers. Marital satisfaction decreased significantly after couples had their …

Effects Of Preexposure To Shock On Autoshaping, Nancy L. Eldred

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The safety signal hypothesis suggests that during the absence of stimuli predicting impending shock, the organism is not fearful. The stimuli which predict the absence of shock are therefore called safety signals. The purpose of the present study was to investigate some critical properties of safety signals. Such stimuli in an avoidance or escape situation, according to the opponent process model, are expected to acquire hedonic value opposite to shock.

This study examined differences in conditioning variables between safety signals predicting different intensities of shock, and between safety signals present in procedures using predicted shock, and procedures using unpredicted shock. …

Metaphorical Interpretations Of The Neurotic Paradox, Mark J. Weaver

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This is a theoretical/philosophical paper which is intended to bring to the reader's attention an emerging literature and discussion which holds potentially productive consequences for the understanding of man. This thesis does not offer completed formulations or empirical groundings. The purpose is to create a basis for dialogue.

This paper will initially specify a current conflict in psychology around the different metaphors used to define the image of man. A theoretical/philosophical basis for viewing the process of generating models of man and his behavior as essentially "metaphorical" is then presented. A specific category of human behavior known as the neurotic …

The Effectiveness Of Electronic Games (Atari) Reinforcers For Increasing Appropriate Behavior In Handicapped Children, James M. Payant

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ten subjects ranging from 9 to 16 years in age with IQ's ranging from 23 to 62 were randomly selected as contingent or noncontingent subjects for two experiments. Five subjects received contingent access to two electronic games for performance within a specified learning session, while five subjects received noncontingent access to the games. These experiments were designed to determine the effect on performance, attending, and compliance skills in the classroom, when contingent access to the electronic games was based on performance. The development of fine motor skills and/or eye-hand coordination skills as a result of game usage was examined. The …

Inter- And Intra-Sensory Modality Stimulus Scaling: A Method For The Determination Of The Relative Salience Of Stimuli In Poison-Based Aversion Learning By Pigeons, David L. Pounds

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One of the most rapidly expanding areas of research in psychology has been poison-based aversion learning (PBAL). The PBAL paradigm typically involves: exposing an animal to a novel substance; inducing illness following ingestion of that substance; and then providing access to the substance at a later time. The initial reaction to the novel substance is generally to reduce consumption, a finding labeled neophobia. The reduction of substance intake on test day is called learned aversion.

Following demonstrations of cue-to-consequence specificity (i.e., the differential associability of some stimuli with certain consequences) in PBAL research with rats, recent research has focused on …

Biofeedback: A Possible Substitute For Smoking, Earl Eugene Griffith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Numerous agencies have accumulated evidence since 1964 which implicates habitual cigarette smoking as a causal or facilitating factor in the development of many circulatory and respiratory diseases. This study sought to identify those psychological variables which possibly contribute to the maintenance of cigarette smoking and therefore, had two main purposes. First, this study investigated the individual and simultaneous physiological changes, i.e., Electroencephalography, Electromyography, Heart Rate, Blood Pressure and Skin Temperature that occurred during and immediately after the smoking of one cigarette. Second, the study investigated the hypothesis that smoking frequency would decrease when individuals were trained via biofeedback procedures to …

Autoshaping Infant Vocalizations, Alexander Mcnaughton Myers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A series of five experiments was conducted to determine whether operant or respondent factors controlled the emission of a particular vocalization ("Q") by human infants 16 to 18 months old. Experiment 1 consisted of a pilot investigation of the effects of an autoshaping procedure on three infants' vocal behavior. All three subjects demonstrated increased emission of the target sound during the CR period. Experiments 2 through 4 attempted to replicate the findings of Experiment 1 under controlled conditions, and failed to do so. Experiment 5a presented infant subjects with a discrete-trial operant procedure (having the identical temporal parameters as the …

Cause And Perceived Seriousness Of Deviant Behavior And Attribution Of Responsibility, Mary Kathryn Morris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to investigate the relationship between differing stated causes of deviant behavior which is commonly labelled mental illness, and the perceived seriousness of these behaviors in determining judgments of the degree of responsibility attributed to described deviant individuals. This was accomplished by having subjects rate four different vignettes as to degree of perceived seriousness and degree of responsibility for behavior.

The subjects were 76 undergraduate students enrolled in either introductory psychology and/or introductory anthropology. The subjects were divided into four groups. Each group of 19 subjects received the same four vignettes. Each vignette gave a …

A Peer-Managed Self-Control Program For Reduction Of Alcohol Consumption In High School Students, Richard Allan Carpenter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three treatments designed to reduce the consumption of alcohol by native American high school students were assessed and compared. Self-referred and staff-referred clients were randomly assigned to three treatment groups: (1) alcohol education and a peer-assisted self-control procedure, (2) a peer-assisted self-control procedure, and (3) a self-monitoring only procedure. All three treatments were conducted by trained peer counselors for 14 weeks. The alcohol education and peer-assisted self-control and the peer-assisted self-control demonstrated reductions in peak blood alcohol concentration, frequency of drinking incidents, and alcohol consumption. The self-monitoring only group demonstrated changes only in frequency of drinking incidents. No significant differences …