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Morphological And Functional Effects Of Diethylstilbesterol And Diethylstilbesterol Diphosphate On Reticuloendothelial Cells Of The Rat Spleen., William M. Steven

Theses and Dissertations

No abstract provided.

Personal And Occupational Characteristics Among Selected Clerical Employees With Improved Employability., Florentine Viola Goodlett Sowell

Theses and Dissertations

No abstract provided.

Evaluation Of The Essentiality Of Dextran In The Dental Caries Process, William Redman Grigsby

Theses and Dissertations

In summary, the main points to support the view that dextran synthesis is unessential to the dental caries process are presented below:

1 . Dextran-fed, microbe-bearing rats do not experience dental caries.

2 . Lactobacillus casei 4646 has no extracellular dextransucrase enzyme or other extracellular enzymes which release glucose or fructose from sucrose .

3. L. casei 4646 does not synthesize extracellular polysaccharide of the dextran class when grown on sucrose-containing medium.

4. L. casei 4646 does not exhibit in vitro, adherent growth on stainless-steel wire when grown on sucrose-containing medium .

5. L. casei 4646 does not cause dental …

The Application Of An Index To Determine Genetic And Environhental Contributions To Dentofacial Growth In Twins And Siblings, Richard Charles Hayes

Theses and Dissertations

The method of principal components may be used to reduce a large quantity of data for an individual into a single statistic, a growth index, indicative of overall facial growth, and to make a determination of the relative contribution of each variable, as well as the genotype and the environment, to the variation between individuals, When this method is applied to four consecutive years of cephalometric and anthropometric data from each of 95 children, consisting of Caucasian and Negro monozygotic twins, like-sexed dizygotic twins, and their siblings of both sexes, it discloses that:

1. The relative contributions of the variables …

An Investigation Of A Mycorrhizal Association On Opuntia Polyacantha, R. Craig Stutz

Theses and Dissertations

Roots of Opuntia, polyacantha Haw. from Juab County, Utah were found to be nodulated. An anatomical study of the nodulated roots showed them to be ectotrophic mycorrhizae. Fusarium poae (Peck) Wollenweaver was found associated with the nodules both as an epiphyte and an endophyte. However, reinfection with this organism failed to induce subsequent nodulation. Under certain conditions the roots of o. polyacantha are able to overcome the mycorrhizal infection and elongate. It is not uncommon for several branch roots to originate from a single nodule. It is suggested that the fungus-root association found in o. polyacantha represents an early stage …

A Study Of Changes In Vocational Interest Inventory Patterns And Scores After Two Years For Male College Students Initially Having No Primary Interest Patterns, Ralph Kent Roberts

Theses and Dissertations

Problem

The purpose of this study was to: (1) determine whether college males who had no primary patterns on an SVIB administered in 1966 developed primary patterns on a 1968 retest and whether there were significant proportional differences in the number of students having one or more primary patterns on their 1968 SVIB among the three treatment groups and the control group; and (2) determine if there were significant differences between the scale means of the 1966 and 1968 SVIB for two groups of students who were dichotomized according to primary or no primary patterns in 1968.

Procedure

The subjects …

A Comparison Of Physical Fitness Development Of Physical Education Students And Athletes Compared To Normal Physical Maturation Of Junior High Boys In Havre, Montana, Neil C. Boyd

Theses and Dissertations

The purpose of this study was to determine the changes in fitness levels shown among a Control Group and two Experimental Groups over a two year period. The Control Group consisted of seventy-two boys not taking instructional physical education or participating in any athletics. Experimental Group I consisted of one hundred subjects taking the regular physical education classes; Experimental Group II, of forty-eight subjects involved in a year round athletic program in addition to the regular physical education classes.

Pre and post test comparisons were made on the seven items of the American Association for Health, Physical Education, and Recreation …

A Histochemical And Fine Structural Study Of Extracellular Fibrils In The Developing Chick Embryo, James J. O'Connell

Theses and Dissertations

The histochemistry of developing connective tissues and its relation to early connective tissue fibrils was investigated in the chick embryo. An area well suited to correlated histochemical and electron microscopic study occurs around the notochord. Here early microfibrils later contribute to the cartilaginous model of the future vertebral body. Chick embryos were sacrificed at one, two, three, four, six and ten days of incubation and were prepared routinely for both light and electron microscopy. A series of five histochemical stains (PAS, alcian blue, Hale colloidal iron, metachromatic toluidine blue, methenamine silver) and two histological techniques (Mallory's connective tissue; Weigert's elastin) …

Age And Growth Of White Bass, Roccus Chrysops (Rafinesque), In Mud Lake, Near Provo, Utah, Frederick Edward Trapnell

Theses and Dissertations

This study was conducted to obtain information that could be used in the management of the Utah and Mud lake white bass fishery. It also provides data for evaluating the effect of the loss of Mud Lake on the white bass utilizing it. Determination of age, growth rate, and coefficient of condition of the Mud lake white bass were objectives in this study. The occurrence of organisms in the digestive tracts of 64 white bass as well as the movement of white bass into and out of Mud Lake were also studied. Hoop nets, a continuous mesh gill net, and …

Ultrastructural Investigations Of Tilletia Caries Teliospores, James Vincent Allen

Theses and Dissertations

The purpose of this study was to investigate the ultrastructure of Tilletia caries teliospores. Specimens were prepared for viewing in the electron microscope by freeze-etching and thin-sectioning techniques. Thin-sectioning techniques gave excellent results with the teliospore walls and the lipid bodies within the teliospore but failed to adequately fix the membranes and internal organelle systems. Micrographs of Tilletia caries teliospores prepared using thin-sectioning show three major wall layers and two partition wall layers and abundant lipid bodies. The freeze-etch method of spore preparation proved superior to the thin-sectioning used in this study to reveal the internal organelle systems of the …

Religious And Secular Correlates Of The Lds Family Home Evening Program, Gordon E. Mauss

Theses and Dissertations

The purpose of this study was to describe and explore three phenomenon of the L.D.S. Family Home Evening Program: (1) the nature of religious commitment in an L.D.S. sample, (2) the degree of participation, (3) the relation of certain religious and secular variables.
The data for the study were made available to the researcher by A. L. Mauss, as part of a larger study designed to measure the impact of Urbanism upon Mormonism. The instrument, modeled after the Glock and Stark studies, was adapted to a random sample of 958 members of the L.D.S. Church in Utah.
The nature of …

A Physical Fitness Comparison Between Rural And Urban Children And Canadian Fitness Standards, Daniel E. Rosin

Theses and Dissertations

The purpose of this study was to determine whether or not Manitoba school students of rural areas were better physically fit than students of urban areas. The investigator was also interested in finding out how these two areas (urban and rural) compared to the National Canadian Association for Health, Physical Education, and Recreation (CAHPER) standards. The comparisons were made by (1) comparing the mean of the rural and urban test results based on the findings of the Centennial Athletic Awards Programme: (2) by compar- ing the mean of rural and urban areas with the CAHPER mean.

The null hypothesis was …

Reproductive Ecology Of Female Sharp-Tailed Grouse (Pedioecetes Phasianellus Jamesi Lincoln) And Food Habits Of Broods In Southwestern North Dakota, Lawrence Stanley Bernhoft

Theses and Dissertations

A study of the reproductive ecology and brood food habits of sharp-tail grouse (Pedioecates phaslanel.lus jamesi Lincoln) was conducted in southwestern North Dakota during 1967 and 1968. A qualitative and quantitative analysis of the nest and brooding cover selected by the female was made to determine the effect of intensive grazing. Radio telemetry was utilized to monitor dispersals of 13 females from three dancing grounds; eight nests were located. Nest sites were selected in areas of moderate grazing with residual vegetation, or in non-use areas associated with intensive grazing' and land-use. Deferred grazing on native range was important in providing …

A Study Of The Status Of Physical Education For The Educable Mentally Retarded In North Dakota Schools, Richard G. Studsrud

Theses and Dissertations

This study was conducted during 1969 to determine current practices in the physical education programs for the educable mentally retarded in North Dakota schools. The purpose of the study was to obtain and analyze data concerning the following aspects of physical education: teacher qualification, scheduled class periods, type of instruction provided, activities, facilities, equipment and supplies used, tests or evaluation procedures used, and attitudes toward physical education.

Ninety-eight questionnaires were sent to physical education teachers of educable mentally handicapped students. Eighty-two questionnaires were returned and analyzed.

Findings of the study warranted a number of conclusions. A high percentage of teachers …

The Relation Of Selected Academic, Biographical And Personality Factors To The Achievement Of Canadian College Freshmen, Calvin W. Vraa

Theses and Dissertations

Problem: The purpose of this study was to determine the relationship of several selected variables to the first year undergraduate grade point average of Canadian inale freshmen enrolled at the University of North Dakota during the 1967-1968 academic year.

Procedure: The subjects used in this study were 59 Canadian male freshmen who were enrolled in the University of North Dakota in the Fall of 1967. The subjects were randomly selected from the total Canadian male freshmen population.

The instruments used in this study were the American College Test, The Fundamental Interpersonal Relations Orientation-Behavior, the Fundamental Interpersonal Relations Orientation-Feelings, and a …

Surface Characteristics Of Conidia From Monosporous Cultures Of Penicillium Digitatum And Aspergillus Nidulans Var. Echinulatus, Raymond Kunito Fuji

Theses and Dissertations

The purpose of this investigation was to evaluate the possible taxonomic significance of the "rodlet" patterns and spore wall configurations of conidia from monosporous cultures of Penicillium digitatum Saccardo and Aspergillus nidulans Eidam var. echinulatus Fennell & Raper. Freeze-etching the conidiospores from single spore isolates of these fungi revealed that spore wall patterns and configurations vary much too greatly to be of taxonomic importance on the strain and subspecies level. Environmental factors and genetic influences are discussed as possible mechanisms causing the variations of the spore wall configurations. A membrane-like structure that covers the "rodlet" patterns and which hinders spore …

A Study Of Folic Acid Dependent Reactions In Bovine Brain, Dillard Spencer Broderick

Theses and Dissertations

The enzymatic interconversion of serine to glycine and N5, N10-methylene tetrahydrofolate to N5 -methyl tetrahydrofolate have been studied in a cell-free system derived from bovine brain. A partial purification of serine transhydroxymethylase and N5, N10 -methylene tetrahydrofolate reductase has been achieved by ammonium sulfate fractionation, protamine sulfate fraction, and by various column chromatography procedures. The two enzymes studied catalyze sequentially the reductive transfer of the hydroxymethyl group of serine to the N5 position of tetrahydrofolate forming N5 -methyl tetrahydrofolate. The products of these reactions were assayed by the incorporation of C14 from a one-carbon precursor i.e., L-beta-(C14)-serine, or N5 -methyl …

A Study Of Conifer Invasion Into Meadows Surrounding Small Lakes And Ponds In The Trial Lake Region Of The Western Uinta Mountains, David Harvey Firmage

Theses and Dissertations

The object of this study was to determine whether or not Lodgepole pine is successfully invading meadows near ponds in the western Uinta Mountains as a preliminary step to the invasion of the Spruce-Fir climax forest. Line transects were established at three sites near Trial Lake extending from forest to wet meadow. Along these transects the soil was studied to determine percent organic matter, pH, depth to mineral soil, and texture. Also the depth of the water table was measured and the topography plotted. The age and size of the trees along the transect was determined, and the extent of …

Phylogenetic Relationships Of Purshia Tridentata And Cowania Mexicana, Stewart C. Sanderson

Theses and Dissertations

Because of the greatly increased supply of genetic variation which it provides, introgression is of great importance in determining both the rate and the direction of evolution. Hybridization between the genera Cowania and Purshia provides an excellent model for demonstrating the various products which might be expected from introgression. The present study is an attempt to further investigate phylogenetic relationships of Cowania mexicana and Purshia tridentata by use of cytological and biochemical techniques.

Thermodynamics Of Proton Dissociation And Metal Ion Complexation In Aqueous Solution. I, Cation Binding With Cyclic Polyethers: Significance In Ion Transport Processes. Ii, Proton Dissociation From Adenosine, Several Monosaccharides And Related Compounds. Iii, Proton Dissociation From Several Pyrimidines And Their Nucleosides At 10, 25 And 40°, Joseph Howard Ryttling

Theses and Dissertations

The log K, ΔH° and ΔS° values for the interaction of several metal ions with the two isomers of the cyclic polyether, 2,5,8,15,-18,21 hexaoxatricyclo[20.4.0.0^9,14]hexacosane are reported. The stability order found for alkali metal ion interaction with either isomer is identical to the order of ion permeability through reconstituted biological membranes for structurally related antibiotics. The size of the metal ion is critical in determining the extent of interaction. A calorimetric titration study of proton ionization from several monosaccharides and derivatives, pyrimidine bases and their nucleosides, adenosine and its derivatives, and cycloheptaamylose is described. The heats of reaction obtained in this …

The Effect Of Chemical Adjuvants Of The Survival Of The Free-Living Stages Of The Gastrointestinal Nematode, Haemonchus Contortus, Anthony T. Chang

Theses and Dissertations

Considerable research has been done on the influence of various chemical adjuvants, such as glycerol and dimethyl sulfoxide (DMSO) on the survival of protozoan organisms. (Levine and Marquardt, 1955; Levine, Mizell and Houlahan, 1958; Levine, et al. 1962; Levine and Andersen, 1965, 1966; Fitzgerald and Levine 1957 1 1961; Diamond, 1964). Considerably less work has been done on metazoan parasites. The effects of various chemical adjuvants on the survival of Haemonchus contortus, the large stomach worm of sheep, at extremely low temperatures has not been reported. The purpose of this research was to determine if different concentrations of chemical adjuvants …

Mechanism Of Water Transport Through Reverse Osmotic Membranes, Cheryl Kay Murphy

Theses and Dissertations

Cellulose acetate membranes show a higher permeability to water than to salt and are being used for desalination of salt water by reverse osmosis. Use of highly acetylated cellulose membranes give a higher salt rejection but also decrease flow rate of the water. The addition of very-short-chain substances or alkyl groups larger than one carbon atom to the cellulose membrane also decreases water flux. A proposed mechanism of transport through the membrane is that the water molecule is passed along the chain by hydrogen bonding with the acetyl groups, The NMR shows a change in the chemical shift of water …

Inhibition Of Asexual Reproduction In Planaria, Lewis Hafen Leavitt

Theses and Dissertations

Asexual reproduction in the decapitated planaria, Dugesia dorotocephala, is inhibited by an extract of homogenized heads of the same or closely-related species. Decapitated planaria allowed to regenerate have reproduced asexually over 80% of the time, while those that have been cultured in a suspension of head homogenate have had asexual reproduction inhibited to less than 10%. The substance that inhibits asexual reproduction is heat labile. It requires a concentration of 2.0 heads/ml that contains .13 mg protein/ml to effectively inhibit asexual reproduction. A similar concentration of head homogenate from the related planaria, Dugesia tigrina, also contains the inhibitory substance. Head …

Syntheses Via Modifications Of The Knorr-Paal Procedure :|Ba. Derivatives Of 2,6-Dioxa-10-Azatricyclo[5.2.1.0[Superscript 4,10]]Decane ; B. Highly Sterically Crowded 1,2,5-Trialkylpyrroles And Pyrrolidines, Weldron Severin Burnham

Theses and Dissertations

Earlier work in these laboratories on the heterotricyclic system 2,6-dioxa-10-azatricyclo[5.2.1.04,10]-decane, formed from 1,4-diketones and 2-amino-1,3-propanediols by a product-water-azeotroping procedure, was extended with the synthesis of analogous compounds, e.g., the 1,4,7-triethyl-, 1,7-dimethyl-4-isopropyl-1,7-diethyl-4-isopropyl-, 1,7-dimethyl-3- and 4-phenyl- compounds. The 1,7-dimethyl heterotricycle, the kinetically-controlled product, was accompanied by the thermodynamically-controlled product, 2-(2,5-dimethyl-1-pyrryl)-1,3-propanediol. The 1,7-diethyl heterotricycle was also accompanied by the isomeric pyrrole as were the 1,7-dimethyl-3- and 4-phenyl compounds. A scheme postulating a common intermediate is presented. The interesting analogous compounds, 1,7-dimethyl-2-oxa-6-thia-10-azatricyclo[5.2.1.04,10]decane, 1,4,7-trimethyl-2,6-dioxa-11-azatricyclo[5.3.1.04,11]undecane and 11-hydroxymethyl- and 11-methyl-9,13-dioxa-14- azatetracyclo[6.5.1.02,7 011,14]tetradeca-2,4,6-triene were also prepared. The syntheses in good yields of a considerable number of moderately to …

The Effectiveness Of Cognitive Conflict And Active Participation As Methods Of Inducing The Conservation Of Substance, Leila K. Beard

Theses and Dissertations

This study was concerned with the possibility of training for conservation. With the component elements held constant across all groups, the effectiveness of two methods of presentation, cognitive conflict and active participation, were tested by a pretest-training-posttest procedure using a 2 x 2 design with a common control group. Within the treatment groups, a conflict presentation of addition-subtraction and perceptual components was contrasted with a non-conflict presentation of the same addition-subtraction and perceptual components, each in a separate series. An active manipulation procedure was contrasted with passive participation. Results indicated that conservation responses increased within the treatment groups significantly more …

A Comparative Survey Of Soil Microfungi From Three Vegetation Types In Cedar Valley, Utah, Brent T. Wahlquist

Theses and Dissertations

Microfungi were isolated from soil samples by the soil plate method. Soil samples were collected at depths of 0-1", 1-4", and 4-8" both between and beneath the canopy of the dominant vegetation in stands of greasewood, sagebrush, and pinyon-juniper. Salinity, pH, and percent organic matter were measured for each soil sample. A total of 148 strains of fungi representing 141 species and 46 genera were isolated and identified from these alkaline soils, Few strains, including some Aspergilli, occurred only in the more saline greasewood soils, while many strains, including several Penicillia, occurred in both sagebrush and piny-on-juniper soils but were …

The Fisheries Of Deer Creek Reservoir, Utah, With Special Emphasis On The Yellow Perch (Perca Flavescens Mitchill), Gale R. Lewellen

Theses and Dissertations

This thesis is concerned with the fisheries of Deer Creek Reservoir, Wasatch County, Utah, with special emphasis on the yellow perch. The study period was from May 13 to November 24, 1968. Objectives included the determination of size, age, and food habits of the yellow perch. Parasitic occurrences in the perch population by Ligula intestinalis were also recorded as well as the utilization of the perch by the fishermen. Observations on other species of fish including an analysis of rainbow trout stocking programs were also objectives of this thesis. Data was gathered by means of creel census and fish collection …

The Thermodynamics Of Transition Metal Chelation In Dilute Aqueous Solution.|Ni.|Pthe Thermodynamics Of Interaction Of Serinate Ion With Divalent Co, Ni, Cu, Zn, And Cd Ions In Aqueous Solution.|Nii.|Pthe Calorimetric Standardization Of Dilute Ferrous Ion Solutions For Use In Determining 2,2'-Bipyridine, Joseph Willard Richards

Theses and Dissertations

Calorimetrically determined ΔH° values are given for the stepwise formation of chelate species between serinate ion and the divalent metal ions of Co, Ni, Cu, Zn, and Cd. These values of ΔH° are compared with those reported in the literature and were combined with values of ΔG° (log K) found in the literature to calculate values of ΔS°. These values of ΔG° and ΔS° are listed also. A new method of standardizing dilute ferrous ion solutions is reported. This procedure makes use of the thermometric titration technique to detect the equivalence point for the reaction of K_2Cr_2O_7 with ferrous ion. …

A Study Of Aquatic Fungi In Powell's Slough, Chao-Chih Hsiao

Theses and Dissertations

Aquatic fungi in-Powell's Slough were.studied in 1967 & 1968. Collections were made and water temperature, oxygen content & pH values were measured at weekly intervals. For collections, wire baskets containing substrata were submerged in water for one month. After collecting, substrata were brought to the laboratory. Identification was based on the keys of Sparrow, 1960. Aquatic fungi identified included seven orders, nine families, fifteen genera, and thirty species, from thirty-three collections of fifteen types of substrata. The substrata used in this study were: (i) fruits: apples, rose hips, plums, pears, haws; (ii) twigs: poplar, weeping willow, river birch, weeping white …

A Revision Of The Hedysarum Boreale Complex, Terry Edwin Northstrom

Theses and Dissertations

The Hedysarum boreale complex consists of all North American Members of the genus Hedysarum which possess free wing auricles, sub-equal calyx teeth, hidden leaflet veins, and wingless loment articles. One species, two subspecies, and three varieties are recognized. The traditional methods of comparative morphology are employed in delimiting species in the herbarium, but pertinent data from field work are also included. The somatic chromosome number was determined for all taxa, and was found in all cases to be 16. Distribution maps, illustrations, and graphical comparisons of taxa are included.