Digital Commons Network^™

Spermiogenesis In Two Male-Sterile Third-Chromosome Mutants Of Drosophila Melanogaster, Richard F. Wilkinson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An ultrastructural study of sperm differentiation was made on two male-sterile mutants of Drosophila melanogaster. The mutations were induced on the third chromosome with the monoalkylating agent ethyl methanesulfonate and were maintained in stock cultures over a balancer chromosome using a system of multiple inversions. The stages of sperm differentiation, a most dramatic form of cellular differentiation, were then studied at the electron microscope level to determine the effect of the mutations on sperm structure and to correlate those changes with normal sperm development.

Studies of the genetic control of cellular differentiation have been hampered by difficulties in devising …

Host-Parasite Relationship Studies Of The Larval Alfalfa Weevil And The Ichneumonid Parasite Bathyplectes Curculionis (Thomson), Yeboa A. Duodu

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The parasitic effects of the ichneumonid Bathyplectes curculionis (Thomson) on the larval alfalfa weevil, Hypera postica (Gyllenhal), were studied.

Results of experiments on the rates of parasitism of the four host larval instars indicated that the first three are either preferred by the parasite over the fourth instar larvae or are more susceptible to the parasite's attack. Survival of the younger weevil larvae after their exposure to female parasites was markedly poorer than that of unparasitized larvae. Premature death of host larvae was probably from both the puncturing by the parasite's ovipositor and the feeding and other activities of parasite …

Teaching Reference Skills To Secondary Students With Reading Disabilities, Sheila Sunada Newlin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

How can I find a job by looking at a newspaper?

What articles does this magazine contain?

What is an index?

How do I find the meaning of this word?

These are problems which any high school student may encounter. Some students may be able to locate the answers immediately. However, the student with a reading disability may be greatly hampered and frustrated because of his lack of general skills in reading and locating information. This student may have difficulty finding facts from common sources of information both in and out of school.

The Energy Expenditure In Comparison Of The Universal Gym And Olympic Weights, Ted A. Zimmerman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of the study was to investigate whether more energy is expended on the Universal Gym or on the Olympic Weights. Ten male volunteer students between the ages of 18 and 24 in a beginning weight training class were used for subjects. The test periods included a pre-test and a post-test. The subjects performed the military press and curls on both apparatuses. The expired air was collected in a Douglas bag; then, gas samples were taken from the bag and were analyzed for oxygen and carbon dioxide percentages. The respiratory quotient was determined from the volume of expired air …

The Action Of Antibiotics And Antimetabolites On The Tobacco Mosaic Virus Infection Process In Bean Leaves, Virendra Nayyar

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The action of 28 antibiotics and antimetabolites at varying concentrations was studied in coincidence with the bioassay of tobacco mosaic virus on detached bean leaves by using an ultrasonic method of inoculation developed by Lamborn, Cochran and Chidester.¹ All tested chemicals were classified, in regard to the virus infection process, as inhibitory or stimulatory and their optimal concentrations in the inoculum were determined. Of the 28 antibiotics and antimetabolites studied, eight were found to stimulate while twenty inhibited TMV infection in bean leaves. From the results of these experiments, an attempt was made to characterize the nature of the …

An Analysis Of Flock Organization In Black-Capped Chickadees, John Ivan Mosher

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An analysis was made of individual behavior and flock organization among 33 color-banded Black-capped Chickadees (Parus atricapillus) on a woodland tract in wester New York State, from December 1967 to June 1970. Also, three of these flocks were confined at various periods for an average aviary tenure of 26 days. From these observations I concluded that the hierarchy and interindividual relationship of a flock remain as observed in the field; testosterone propionate causes an increase in injected subordinate bird's activity; but did not effect a change in its rank.

From the observations in the aviary, it was found …

Nitrification Potential In Arid Western Soils, Hasumati R. Patel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Nitrification rates were determined by perfusion method in Southern Curlew Valley (Utah) soils from 0 to 1.3 meter profiles as a function of seasons. Ammonification rates were determined at various moisture contents and seasonal variations of ammonium concentration in the same soils were estimated.

Rate of nitrification was higher in warm showery periods (May and June) than in colder periods (September, October and November). In the top 3 cm layer, nitrifying activity was several fold higher than in the rest of the profile. Cultivation increased the nitrification rate.

Considerable ammonium fixation by soil particles, volatilazation of ammonia and nitrite accumulation …

Low Temperature Germination Of Tomato Seeds, Dawn M. Gatherum

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine the pattern of inheritance of low temperature germination of tomato. This was accomplished by crossing a tomato (P.I. 341988) that germinates at a low temperature (10 C) with a commercial mechanical harvest cultivar (VF 145-B-7879). The parents, F₁, F_2, and F₃ progenies were tested for low temperature germination responses at 10 C for 15 days. The results show that a single recessive gene is responsible for the low temperature germination character.

Also, a study of the seed coat thickness of the tomatoes VF 145-B-7879 and P.I. 341988 was …

Effects Of Several Solutes And Water Stress On Succinic Dehydrogenase Activity, Rex Alton Richards

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The influence of the concentration of several solutes on the activity of succinic dehydrogenases from acetone powders of several species was studied spectrophotometrically. The plants used were: Cauliflower (Brassica oleracea var. botrytis, L.) sugarbeet (Beta vugaris, L.) sunflower (Helianthus annus, L.), Halogeton glomeratus (M. Bieb) C.A. Mey., and Samphire (Salicornia rubra, A. Nels.). Sodium chloride, potassium chloride, mannitol, sucrose, glycerol, glucose, and Hoagland's solution, at increasing concentrations, were used.

Decreased (more negative) osmotic potential produced by sodium chloride, potassium chloride, and Hoagland's solution resulted in a slight increase in enzyme activity at low …

Xenobiotic Detoxication Potential And Drug Induced Changes In Carbaryl Toxicity In The Alfalfa Leafcutter Bee, Megachile Rotundata (Febricius), Richard M. Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The alfalfa leafcutter bee, Megachile rotundata, one of the most important pollinators of alfalfa, generally became more susceptible to carbaryl as the adults aged. LD₅₀ values for carbaryl toxicity were 240,166, 109, and 51 μg carbaryl/gram for the 1, 2, 3, and 4 days-old adult male bees. For the female bees, these were 245 , 551, 289, and 262 μg car-baryl/ gram. Lipid content and microsomal enzyme activity (measured by EPN detoxication in vitro) decreased in both sexes as the bees aged.

Synergist ratios, defined as the ratio of the LD₅₀ of carbaryl alone …

Reproduction And Hematology Of The Cache Elk Herd, Thomas B. Follis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The initial three years of a 10-year reproductive study of elk involved three major phases. A fourth was added because of convenience. Objective 1 was to ascertain pregnancy rates in yearling and mature elk by rectal palpation, associate these rates with subsequent fall cow/calf ratios, and to test concurrently an ultrasonic fetal heart detector. Rectally observed anatomical changes in gravid uteri of cattle were directly applicable to elk. Ultrasonic detections of pregnancies in elk and deer were unsuccessful.

Pregnancy rates in the 1969-70 winter of 100 and 0 percent, respectively, for 19 adult and five yearling elk were associated with …

Some Aspects Of Conditioning Behavior In Rainbow Trout, Salmo Gairdneri, Reed E. Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Effects of exercise, social facilitation, and delayed conditioning after vi exercise on the learning behavior of 5 to 6-inch rainbow trout, Salmo gairdneri, was measured in a conditioned avoidance response apparatus. The conditioning schedule contained an intertrial interval between alternate presentations of conditioned (light) and unconditioned (shock) stimuli. This randomization eliminated learning losses found in a previous study. Mean percentage avoidance, the measurement of learning, did not decrease significantly during conditioning trials. Exercised fish learned avoidance better than did non-exercised fish. Mean percentage avoidance for fish exercised at 0.5 ft/sec was 66.3; at 1.0 ft/ sec, 1.5 ft/sec, and …

Population Biology Of The Black-Tailed Jackrabbit (Lepus Californicus) In Northern Utah, L. Charles Stoddart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Population biology of the black-tailed jackrabbit population on a 250-square-mile area in Curlew Valley, northern Utah, was studied from 1962-70. During this period the fall population density index increased from 40.0 in 1962, to 60.6 in 1963, decreased progressively to a low of 21.2 in 1967, then increased the following 3 years to a high of 185.0 in 1970.

Breeding was synchronous with four conception periods each year; in some years a fifth conception period was evident. The first conception period occurred about the last half of January; other periods followed at 40-day intervals indicating a 40-day gestation period and …

An Analysis Of Stock Densities And Harvest Of The Cutthroat Trout Of The Snake River, Teton County, Wyoming, John W. Kiefling

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An intensive creel census and marking program was conducted in 1969 and 1970 to make possible population estimates and estimates of harvest of cutthroat trout in the Snake River in Teton County, Wyoming. Stock density determinations made in one of the five study areas provided an estimate of 400 and 992 cutthroat trout, eight inches or more in length, per mile of stream in 1969 and 1970 respectively.

Harvest data provide an estimate of 5,207 and 5,903 cutthroat trout harvested in 1969 and 1970 respectively. The harvest estimates obtained in this study are not comparable to those made in 1967 …

Nitrogen Movement Under Irrigated Corn As Influenced By Nitrogen Source And Rate, Douglas C. Muir

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine nitrogen movements under a fall applied fertilizer as affected by rate of application of fertilizer, type of fertilizer carrier, and by crop grown. Two nitrogen fertilizers, calcium nitrate and ammonium sulfate, were applied in the fall of 1970. The soil profile was sampled in the spring of 1971 and again in the fall of 1971. Nitrate-nitrogen from both the calcium nitrate and the ammonium sulfate applications was found to have moved significantly from the time of application to the time of spring soil sampling. Two effects from the high rate of both …

An Analysis Of The Taxonomic Status Of A New Taxon In The Genus Salsola, H. Lamont Arnold

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An attempt was made to determine the taxonomic status of a Salsola taxon new to Utah but found quite extensively in parts of Nevada, and California. The disciplines of cytogenetics, morphology, anatomy, chemotaxonomy, and palynology were employed.

It is the consensus of some taxonomists that this new taxon, referred to as Salsola X and which has lax perianth tips, is a variant of the Salsola Salsola paulsenii Litv. or barbwire Russian thistle taxon. Accepted taxonomic authorities on the Cheopodiaceae, Aellen and Botschantzev, consider the erect, spinose perianth tips to be a morphological character used in delimiting S. paulsenii. If …

Investigations Of The Algal Productivity Of Selected And Limited Sites Along The Western Shore Of Bear Lake, Utah-Idaho, John William Sigler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Investigations of limited and selected areas along the western shore of Bear Lake were carried out to determine the relative algal productivity with relation to nutrient concentrations and incident sunlight. The primary objective of the study was to determine the effects of nutrient changes in the littoral zone on the western shore on the algal productivity and to establish a baseline of data.

^l4C0₂ radioisotope was used as the principal measurement of organic carbon production as an estimate of productivity. Chlorophyll extracts were made and used as a secondary method for the estimation of productivity. Chemical analysis of …

The Adequacy Of The Rich County 701 Plan In Controlling The Pattern And Intensity Of Land Use Around Bear Lake, Utah, William N. Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis is to evaluate the potential effectiveness of the Rich County 701 Plan as a planning and management aid in controlling the development around Bear Lake. The success of the plan in integrating cultural data and natural resource data is judged on the basis of professionally accepted techniques of resource analysis and on the availability of pertinent planning data.

Guidelines for evaluating the land use controls for Bear Lake that will result from the Plan are derived from the shoreland ordinances of Wisconsin and Minnesota and the lakeshore experiences of New Hampshire and Vermont.

A History Of The Public Library Movement In Utah, Max J. Evans

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The public library in Utah and its acceptance as a public institution is the subject of this thesis. For present purposes, public libraries will be defined as those open to all, those having general collections of books, and those which circulate their books among the public. This thesis does not treat church, school, college, industrial, medical, law, and special libraries, except as they functioned as public libraries.

Most of Utah’s earliest public libraries were operated and supported by private individuals and organizations. As private support proved insufficient, however, cities and towns began to take up this responsibility. In the year …

Spawning And Early Life History Of Largemouth Bass (Micropterus Salmoides) In Wahweap Bay, Lake Powell, Kent D. Miller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Spawning time and habitat of largemouth bass, survival of embryos, and growth and food habits of fingerlings were studied in 1968 and 1969 at Wahweap Bay, Lake Powell. Spawning began in mid- to late-April, when mean daily water temperature at nesting depths was 14.4-15.0 Centigrade (58-59 Fahreheit), and continued until mid-June. Most spawning took place on the northeast shore of the bay. Sandstone rubble was the most commonly used bottom type for nesting, either at the base of ledges or around large sandstone boulders. Mean nest depth increased from 1.63 meter to 4.54 meters (5.36 feet to 14.90 feet) in …

The Effects And Desirability Of Utilizing Dried Whey In Selected Food Products, Katherine P. Robinson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects and desirability of utilizing dried whey in pie crust, muffins, and beef gravies were studied using taste panel evaluations and objective testings.

In pastry the addition of whey caused significant changes. As the whey level increased to 10 percent of the flour weight, the crust became browner during baking and the shortometer recorded an increase in tenderness. The taste panel noted as whey levels increased to 10 percent and above that the color became yellow instead of creamy white; the flavor became undesirable; and pastry became less tender and flaky.

Whey significantly increased the desirability of muffins by …

Effects Of Zinc Deficiency On Hemoglobin, Red Cell Counts, Red Cell Fragility And Circulating And Storage Levels Of Zinc, Iron And Copper In The Rat, Rekha R. Dalvi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three experiments were conducted to study the effect of zinc deficiency on hemoglobin, red cell counts, red cell fragility, storage of erythropoietic minerals in livers and circulating levels of zinc, iron and copper in the rat.

In the experiment 1, twenty weanling rats were divided into four groups. Two groups were fed zinc-deficient diet ( <0.5 ppm); and two groups, zinc-supplemented diet (50 ppm). The rats in the first and third groups were bled three times a week (bled), however the rats in remaining groups were bled once a week (non-bled). All rats received ad libitum food.

Mean food intake per day was considerably less for zinc-deficient rats than that for zinc-supplemented rats. Approximately 2 to 3 times as much food was required for each gram of body weight gained by the zinc-deficient group as by the controls.

In the experiment 2, …

Some Aspects Of Muskrat Ecology At Big Island Lake, Alberta, Roger G. Schmitke

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The untimely death brought to a stop the work on his Master of Science degree and a termination of a promising career in the conservation field. Drowned in the line of duty was Roger Schmitke on June 10, 1965, in the Redwater River near Edmonton, Alberta, Canada.

Prior to his death, Roger had worked diligently on his research assignment and had collected all of the data deemed necessary for the completion of the thesis. Partial analysis of the data had been made. The present volume is an attempt to bring together his data and analyses for presentation to his graduate …

The Use Of A Phonetic Approach To Reading With Three And Four-Year-Old Children, F. Walda Hopkins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to determine if girls of preschool ages find more success in learning letters of the alphabet, their sounds, and simple two and three letter words formed from these letters, than boys of similar ages; and in addition to compare the achievement of three-year-old children to that of four-year-old children.

The children were introduced to six letters of the alphabet and the sound associated with these letters. They were then introduced to sixteen two and three-letter words that could be formed from these letters. At the conclusion of the ten tasks, a post test was …

The Problems Confronting Small Utah Companies Seeking The First Increment Of Public Equity Capital, John A. Kerr

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objective of this research is to isolate and analyze those areas which represent the greatest difficulty in expense, ad ministrative burden and confusion. Information was gathered by survey and interviews to determine what services are offered by underwriting firms and what services small businesses have found most beneficial in planning and executing their offering. The information gathered in Utah is compared with that gathered in California to determine the differences in the public equity markets of the two regions. These differences are the bas i s for the recommended changes in the underwriting procedures in Utah.

A Study Of Attitudes Of L.D.S. Senior Citizens Of Logan, Utah Regarding Personal Adjustments, Antoine R. Munk

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objectives of this study were first, to examine the attitudes of L.D.S. (members of the Church of Jesus Christ of Latter-Day Saints; also commonly known as the Mormon Church) senior citizens living within the city limits of Logan, Utah regarding certain of their personal adjustments during old age (a personal adjustment score was derived from a scale developed by Cavan, Burgess, Havighurst and Goldhammer, 1949); and second, to determine whether selected variables were related to these attitudes toward personal adjustment. The variables examined in determining this relationship were chronological age, sex, marital status, the individual's definition of present health, …

Open-Closed Mindedness Of Students In Teacher Education And In Other College Fields, W. Blair Low

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Purpose of the Study

This study sought to determine if teacher education students in two institutions of higher education were more authoritarian or closed minded than students in other fields of study. In addition, the study was designed to explore the relationship of other variables--sex, religious affiliation, church attendance, and city size and state of child residency-- to open-closed mindedness.

Methods and Procedures

Participating in this study were 1049 junior and senior students from Utah State University and 837 subjects from Weber State College. Subjects were primarily from a Latter-day Saint (Mormon) subculture. All subjects were administered the F Scale …

Structural Geology Of The Oxford Peak Area, Bannock Range, Idaho, Larry C. Raymond

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The mapped area, in southeastern Idaho, includes part of the Bannock Range, on the west, and Cache Valley, on the east. It is centered about 13 miles northwest of Preston, Idaho, and measures 12 miles in the north-south direction and 8.5 miles in the east-west direction.

The Bannock Range, in the western part of the mapped area, consists of Precambrian and Cambrian stratigraphic units. The Precambrian units are as follows: (1) lower Precambrian argillite, (2) Precambrian quartzite, and (3) upper Mutual Formation. The Brigham Formation, which overlies the Mutual, is probably of Cambrian age; however, the lower part may be …

The Effect Of Early Spring Clipping And The Level Of Nitrogen Fertilizer On The Yield Of Improved Pastures, North Logan, Utah, Dechar Sumrit

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The influence of agronomic practices on forage production and chemical composition of grass-legume pasture mixture was studied at the Utah State University Dairy Farm, North Logan, Utah, during spring and summer, 1970. The soil is a well-drained Millville silt loam that has about a 1 percent slope. It is high in potash, phosphorus, and lime, having a pH of 7.9.

Analysis of the clipping management showed that the early spring clipping decreased the yield of forage. The losses in total yield due to spring clipping were approximately four to five times the yields received in early spring clipping. The grasses …

A Validation Of Koppitz's Scoring Method For Children's Human Figure Drawings, William Gary Evans

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to see if the Koppitz objective scoring method for interpreting children's human figure drawings could be used as a valid assessment instrument with elementary school children. Human figure drawings were obtained from two matched groups of elementary school students, a normal and an emotionally disturbed group. The results of the comparison of human figure drawings of the two groups did not support Koppitz's findings. The Koppitz objective scoring method was found to be invalid as an assessment instrument with elementary school children and of doubtful use in diagnosing emotionally disturbed children. Possible explanations for …