Digital Commons Network^™

The Biochemical Response Of Provo Bay To Nutrient Inflow, R. Bruce Sundrud

Theses and Dissertations

Provo Bay of Utah Lake, Utah, receives the effluents from farms, industry, and three cities. In order to determine the effects of these effluents, eleven stations were established throughout the Bay. At weekly intervals from June 19 to October 26, 1970, and monthly thereafter until March, 1971, the water at these stations was sampled for dissolved oxygen (DO}, carbon dioxide (CO2), turbidity, pH, phosphates, nitrates, biochemical oxygen demand (BOD) and coliform bacteria. Due to intense algal blooms, the quality of the water changes as it passes through Provo Bay. Average values for the inflow, mid-Bay, and point of discharge respectively …

A Study Of Seed Germination And Establishment Of Seedlings Of Lodgepole Pine In Different Soil Types Under Certain Bog Conditions, Yun-Fan Yuan

Theses and Dissertations

Soil texture, organic matter content, and hydrogen-ion concentration of soil samples were determined to find the correlation between soil characteristics, seed germination and seedling establishment of Pinus contorta. Scarification and stratification were treatments used for determining germination requirements of dormant seeds. Seeds were planted in different soils and experiments were conducted to determine the effects of different light intensities, temperatures, and depths of the water table on apparent photosynthesis rate and seedling establishment. Soil samples, pine cones, and young trees needed for the experiments were collected near Lily Lake, in the Uintah Mountains. The greatest and the fastest germination was …

A Calorimetric Study Of Metal Ion Cyclic Polyether Interaction :|Bi. Cation Binding Properties Of Macrocyclic Polyethers In Aqueous Solution As A Function Of Temperature ; Ii. Effect Of Solvent Dielectric Constant On The Binding Properties Of Cyclic Polyethers For Na[Superscript +] And K[Superscript +], Dennis Pershing Nelson

Theses and Dissertations

The complexation properties of the two isomers of the cyclic polyether dicyclohexyl-18-crown-6 are examined in aqueous solution for a series of metal ions at various reaction temperatures. The results are discussed in terms of size relationships and salvation characteristics of both polyether and metal ions. ΔCp° values are determined from the temperature dependence of the ΔH° values. A discussion of the errors involved in the determination of ΔH° from the temperature dependence of log K values is also included. Comparisons are made between the results of this study and those of a similar study by H. K. Frensdorff, E. I. …

The Psammon Of Bars And Beaches In Two Small Northwestern Minnesota Streams, Richard D. Urban

Theses and Dissertations

Sand bars and beaches of the Mississippi (MR) and Wild Rice (WRR) Rivers, Minnesota, were sampled to allow determination of sand texture, capillarity, pore space, organic content, temperature, chemistry (pH, Og, CO3 and HCO3 alkalinity, total hardness, Ca, Mg, PO4, NH3-N, and NO2-N) of interstitial, water, and composition and concentration of psammo-organisms, all in relation to current influences, distance above and below waterline, and depth into the sand.

Minimum and maximum values for capillary rise were 36-80 mm in the MR and 118-191 mm in the WRR; organic content was 217.4 mg/10cc sand for the MR and 377.1 mg/10cc sand …

Acoustical Communication In The Sharp-Tailed Grouse, Louis Henry Kermott Iii

Theses and Dissertations

The Sharp-tailed Grouse has evolved a highly complex system of visual and acoustical signals due to increased social interactions necessary with the predator pressure of an exposed environment. The first portion of the spring mating season is primarily involved with establishment and defense of territories. Predominant acoustical signals are aggressive, highly ritualized, and involved in individual location and recognition. During mid-season females visit the lek, are courted by males, and copulations occur. Acoustical signals are concerned with attracting and stimulating females, vary on a time and frequency continuum, and are thus not as highly ritualized. During the last portion of …

Overwintering Of Three Species Of Snakes In Northwestern Minnesota, Jeffrey W. Lang

Theses and Dissertations

The hibernacula, overwintering cycles, extent of return to the hibernacula, and associated movements of three species of snakes were studied near Itasca State Park in northwestern Minnesota. Red-bellied snakes (Storeria occipitomacula), smooth green snakes (Opheodrys vernalis), and young eastern gartersnakes (Thamnophis sirtalis) were collected at enclosed hibernacula and marked by scale clipping. Inactive ant mounds built by Formica ulkei were utilised extensively as hibernacula by these snakes. During two winters, eleven mounds yielded 2260 Storeria, 409 Opheodrys, and 182 Thamnophis. Temperatures near overwintering snakes in five hibernacula ranged from 0-5 C. Mortality occurred in one mound where snakes were exposed …

An Investigation Of What Relationships Exist Between A Child's Performance Of Selected Tasks Of Conservation And Selected Factors In Reading Readiness, Beverly W. Brekke

Theses and Dissertations

Problem: The purpose of this study was to determine what relationships exist between a child's performance of selected tasks of conservation and selected factors in reading readiness. Comparisons were also made between conservation and reading readiness to selected variables such as mental age, sex, chronological age, and teacher prediction.

Procedure: The research population for this study was comprised of 81 first grade subjects enrolled in four classrooms of the Grand Forks Public Schools during the 1970-1971 school year. The students were selected to be representative of the total Grand Forks, North Dakota school population. Due to changes in school populations …

The Altitudinal Distribution Of Mammals Of The La Sal Mountains, Utah, Stephen Robert Bradley

Theses and Dissertations

This study deals with the distribution of the mammals of the La Sal Mountains, Grand and San Juan Counties, Utah. The distribution of the mammals has been correlated with the distribution of the vegetation zones of the mountains which varies with the elevation. The study points out which of the various mammals are found in the various vegetational communities and how the distribution varies from community to community.

The Hyobranchium And Throat Myology Of The Ambystomidae Of The United States, John E. Krogh

Theses and Dissertations

The 16 species and subspecies of the Ambystomidae of the United States are placed into six groups according to their throat morphology as follows: The Dicamptodon group, the Rhyacotriton group, the A. annulatum-A. cingulatum group, the A. gracile-A. jeffersonianum-A. mabeei-A. macrodactylum-A. maculatum group, the A. talpoideum group, the A. opacum-A. texanum group, and the A. rosaceum-A. t. tigrinum-A. t. melanostictum-A. t. nebulosum group. Dicamptodon appears to be the most primitive group and Rhyacotriton the most specialized. Based on the morphology of the throat region it is suggested that A. rosaceum be placed in the tiger salamander group as a subspecies …

Eutrophication Of Small Lakes, Lynn T. Kenison

Theses and Dissertations

An estimate was made to determine the amount of nitrate and phosphate entering Utah Lake in 1968. To make this estimate, the flow data for 1968 and the nitrate and phosphate concentrations for 1970 were used. This was done because of the lack of information. The results show that the total nitrate added to Utah Lake in 1968 was 7,638,000 pounds. The total phosphate added was 1,740,200 pounds. Of this amount, 12,4 per cent of the nitrate and 18.0 per cent of the phosphate was released from the lake through the Jordan River. The rest remained in the lake to …

Transition From Laminar To Turbulent Flow For A Two-Phase Mixture, Mohammed Sharief Qureshi

Theses and Dissertations

A phase is simply one of the states of matter. Multiphase flow is the simultaneous flow of several phases. Two-phase flow is the simplest case of multiphase flow.

Bacterial Receptor Sites For Uptake Of Transforming Dna, Douglas Pierre Bingham

Theses and Dissertations

Bacterial transformation is defined as a mechanism of genetic exchange whereby a population of bacteria can obtain genetic informa-tion as a result of cellular uptake and integration of extracellular deoxyribonucleic acid released from other bacteria by natural or in-duced lysis. In order for a transformable strain of bacteria to take up DNA and to undergo transformation, the cells must be in a physiolog-ical state called competence. A cell is referred to as competent if it has the ability to bind extracellular DNA irreversibly and subsequently to integrate and express the DNA.

The Development Of A Modular-Flexible Schedule Model And Its Utilization In Building A New Secondary School Physics Curriculum, Lloyd L. Fezler

Theses and Dissertations

Problem: It was the primary purpose of this study to develop a secondary school physics curriculum guide for use within a modular-flexible schedule framework. A secondary aspect was to design a model modular-flexible schedule specifically for physics instruction.

Procedure: Information has been obtained through the direct visitation of seventeen schools in the Minneapolis-St. Paul and suburban areas which were using a modular-flexible scheduled program. A comprehensive study has been made of the physics curricula used in each school to determine its relative effectiveness within a modular-flexible framework.

Interrogation of administrators, staff members and. curriculum • specialists was employed to ascertain …

A Computer Simulation Of A Partial Venous System Of A Human Lower Extremity, David C. Smith

Theses and Dissertations

The human body is truly a fascinating and complex creation of our Maker. Because of the complexity and variability, many of its workings were little known until recent years. Some of the more amazing facts of the circulatory system follow. If the individual blood vessels of a single adult, i.e., artery, arteriole capillary, venule and vein, were laid end to end, they would extend more than 60,000 miles. For the average adult, the heart beats 70 times per minute; for the well-conditioned athlete, 50-60 beats per minute; and for the extraordinary athlete, as few as 37 times per minute. The …

Characterization Of A Soluble Form Of Structural Protein From Neurospora Crassa, Clarence Denis Perterson

Theses and Dissertations

The study of membrane assembly has, until now, consisted of fractionating a membrane into its components or of assembling model membranes from non-physiological components. A native precursor to membranes was obtained as a quasi-crystalline material. It was the purpose of this work to develop the appropriate techniques for characterizing the material as well as to carry out the characterization. The results of the characterization indicate the quasi-crystalline material contains a single protein, structural protein. This protein is in two forms which may reflect two sequential steps in membrane assembly. One form is solubilized in 2-chloroethanol and isolated by gel filtration. …

A Comparative Study Of The Relative Levels Of Physical Fitness Of Male Lds Missionaries Who Are Commencing And Those Just Concluding Their Missionary Service, Wilford J. Hoglund

Theses and Dissertations

The problem of this study was to determine the relative levels of physical fitness of male L.D.S. Missionaires who were commencing and those just concluding their missionary service. The study was conducted with 50 randomly chosen subjects in each group.

The following conclusions were drawn based on the findings of the study:
1. Returning missionaries were found to have experienced a significant decrease at the .01 level in the following areas: leg and back strength, total strength score, strength quotient, total seconds ran, total endurance score and over-all fitness score.
2. Returning missionaries increased in gripping strength at the .01 …

A Study Of Cell Proliferation In The Amputated Forelimb Of The Frog, Rana Clamitans, Robert S. Crissman

Theses and Dissertations

No abstract provided.

Effect Of Lithium Carbonate On The Rat Thyroid, Carl E. Heltne

Theses and Dissertations

No abstract provided.

The Fine Structure Of The Pia Mater Of The Rat, Dennis E. Morse

Theses and Dissertations

No abstract provided.

The Effects Of Simplification Of A Complex Linguistic Task On The Learning Of The Task, Sally Johnson

Theses and Dissertations

No abstract provided.

A Pragmatic Analysis Of Three Theories Of Meaning, J D. Meacham

Theses and Dissertations

No abstract provided.

Sociology And The Ecosystem : An Integrative Approach To The Problem Of Agricultural Pollution, Gregory S. Kowalski

Theses and Dissertations

No abstract provided.

The Effect Of Remedial Reading On The Expressive Ability Of School Age Children, Vicki Jacobs

Theses and Dissertations

No abstract provided.

Alienation And Student Unrest In Universities : A Cross-Cultural Study, Yui Huen Kwan

Theses and Dissertations

No abstract provided.

Erosion And Sedimentation In Lake Ashtabula, Southeastern North Dakota, Darryll T. Pederson

Theses and Dissertations

Erosion along the shore of Lake Ashtabula and nearshore and offshore sedimentation were studied from May 1969 to December 1970. The lake, located in the southeastern part of North Dakota, was formed when the Baldhill Dam stopped the flow of the Sheyenne River in 1950. Maximum depth of the lake is 45 feet in the inundated river channel immediately above the dam. The lake is 27 miles long and ranges in width from 1/3 to 1/2 mile.

Shoreline erosion, measured at stations located at 100-foot intervals around the margins of the lake, was found to be a major source of …

Quantitative Geomorphology And Hydrology Of The Cass River Basin, New Zealand, Frank J. Schulte

Theses and Dissertations

The Cass River drainage basin is in the Southern Alps in the central part of the South Island of New Zealand. The Alps are composed of complexly folded greywacke which is still actively rising. The basin has been modified by several glacial advances during Pleistocene time.

The Cass basin has a temperate climate characterized by a steep precipitation gradient. Its vegetation includes plants of the forest grassland, shrubland, swamp, rock, and river-bed associations.

The Cass basin may be divided into four geomorphic areas: bedrock areas, high-angle fans, moderate-angle fans, and a low-angle fan. The bedrock areas consist of fractured greywacke; …

Male Genitalia Of Subgenera And Species-Groups In The Ant Genus Formica L. (Hymenoptera : Formicidae), Jeurel Singleton

Theses and Dissertations

No abstract provided.

Modification Of A Spectrophotometric Method For Assaying Caffeine And Its Use In Determining The Effects Of High Pressure Environment On Caffeine Levels Of Blood And Urine In Mice, Deane A. Stites

Theses and Dissertations

No abstract provided.

Influencing Factors In Murine Sarcoma Virus Infections., Timothy M. Dolan

Theses and Dissertations

No abstract provided.

Comparative Adrenocortical Responses Of Laboratory Rats And Guinea Pigs Exposed To Normal And Hyperbaric Environments., Ronald Adams Bitter

Theses and Dissertations

No abstract provided.