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A Comparative Study Utilizing Carpet For Machine Noise Reduction In An Industrial Technology Woodworking Laboratory, Eugene A. Schlomer

Theses and Dissertations

The nature and scope of this study was an experimental research project designed to determine what effect the installation of carpet would have on the redu·ction of potentially harmful airborne and structure-borne noise levels emitted from standard industrial woodworking machines commonly used in school instructional programs

The specific objectives formulated for the study were to (1) determine the feasibility of using carpet as a sound absorbent floor covering material to control the airborne and structure-borne noise emissions from selected woodworking machines, (2) determine the potentially harmful noise levels produced by various woodworking machines, (3) determine what effect the carpet installed …

The Effects Of Deficiencies Of Certain Mineral Nutrients On The Activity And Various Properties Of Ribulose-1,5-Diphosphate Carboxylase From Barley (Hordeum Vulgare L.), Philip Alan Harrison

Theses and Dissertations

Barley plants grown in Mg, Mn, Zn and Cu deficient media were analyzed for specific activity, total activity and amount of RuDPCase present. Percent dry weight, as well as chlorophyll and soluble protein content were determined. All deficiencies caused lower chlorophyll and RuDPCase concentrations than occurred in the control. Soluble protein content, however, was higher in all deficient plants than in the control, either on a dry or a fresh weight basis. The addition of 18 μM Mn^2+ increased the activity of Mg^2+ containing RuDPCase preparations as much as 133% above normal. The specific activity of RuDPCase from Mg, Mn, …

Fate And Metabolism Of Bas 290-H In A Model Ecosystem, Kuo-Mei Chang

Theses and Dissertations

The use of chemicals to control economic pests has grown in this century both in the amount and the diversity of materials used (Headley and Lewis, 1967). About ten billion pounds of pesticides have been used in the United States since 1945. It is estimated that there are 340 million acres of cultivated lands in the Continental United States. Of this amount, approximately 119 million acres were sprayed with herbicides, 97 million acres were treated with insecticides and 25 million acres were treated with fungicides and other minor pesticides (Matsumura, 1972).

Morphogenesis Of Photoreceptors In The Chick Retina: An Electron Microscopic Study, Mark D. Olson

Theses and Dissertations

An electron microscopic investigation of the morphogenesis of photoreceptor cells in the domestic fowl (Gallus gallus) retina is presented in this study. The fine structural observations illustrate photoreceptor development ranging from five to twenty-one days of incubation and one to two days post-hatching. Retinal tissues were fixed in buffered aldehyde fixative, post-fixed in buffered 2% osmium tetroxide and otherwise conventionally prepared for electron microscopy.

The neural (sensory) retina of the chick is largely occupied by undifferentiated cells within the outer neuroblastic layer from the 5th to 9th days of incubation. This layer is later divided into the inner and outer …

A Comparison Between Teacher-Directed Instruction And Student Self-Directed Study In Physical Science For Undergraduate Elementary Education Majors, Douglas L. Magnus

Theses and Dissertations

Purpose of the Study: The purpose of this research was to compare the learning which occurred in a college physical science class for pre-service elementary teachers between two teaching-learning methods identified as teacher- directed instruction and student self-directed study. The specific areas investigated were: (1) knowledge of physical science content, (2) development and application of the processes of science, (3) attitude toward physical science and (4) attitude toward student self-directed study.

Procedure: The research sample used in this study consisted of 95 elementary education majors enrolled in four sections of Chemistry 327 which is a required physical science course. The …

The Food Habits And Age And Growth Of Goldeye, Hiodon Alosoides (Rafinesque), In Beaver Creek, Lake Oahe, North Dakota, 1971-72, Paul T. Schadewald

Theses and Dissertations

Goldeye from Lake Oahe were studied during 1971-72 to determine their food habits and age and growth. Stomachs were collected from 833 goldeye during twelve 24-hour periods, Contents were analyzed to determine bihourly and spring and summer food habits, Cladocera, principally Daphnia sp.t comprised 75% of the average stomach volume, Frequency of occurrence was 98.4% for Cladocera and 87.2% for Insecta. Young-of-the-year goldeye fed entirely on microcrustaceans. The diet of older age classes was predominantly microcrustaceans, but always included insects. Feeding occurred during all hours of the day, but increased significantly at night. Goldeye were concentrated in surface waters when …

The Effects Of Penicillin Upon The Fission Rate Of Dugesia Dorotocephala., John J. Fahsbender

Theses and Dissertations

Planaria (class Turbellaria) are the highest life forms which exhibit fission (Hyman, 1951). The laboratory planarian, Dugesia, lives in lakes, ponds, streams and springs, where it occupies bottom habitats. Fissioning is an asexual mode of reproduction. The fission plane is usually transverse, forming behind the pharynx, and separation appears to be dependent upon locomotion (Curtis, 1902). The posterior half of the worm adheres to the substratum while the anterior half continues to move forward until the worm snaps in two. Each half then regenerates the missing parts, forming two new smaller worms.

Development Of Standard Procedures For Determination Of [Delta]G° (K), [Delta]H° And [Delta]S° Values Via Potentiometric And Calorimetric Titration Techniques, Jack Hugh Ruckman

Theses and Dissertations

Standard computer techniques were developed for computation of ΔG° values from potentiometric titration data and ΔH° values from calorimetric titration data. The procedures developed can be used for any systems having the general equations HA = W^+ + A^- ; H_2A = 2H^+ + A^2- ; and H_3A = 3H^+ + A^3-, where the proton ionizations may be consecutive or simultaneous. The thermodynamic values ΔG°(K), ΔH° and ΔS° were determined for the ionization of protons from the protonated compounds methionine (-NH_3^+ group only), phosphoethanalomine and phosphoserine. The compounds studied were selected because they contain one, two and three ionizable protons …

The Effects Of Thiamin Deficiency And Thiamin Antagonists On Cardiac Function In The Rat, D. James B. Sutherland

Theses and Dissertations

A study was made to determine what biochemical changes were involved in the slowing of the rat heart rate during thiamin deprivation, pyrithiamin or oxythiamin treatment. The appearance of bradycardia during progressive thiamin deficiency was shown to be related to the reduction in myocardial enzymatic activity of pyruvate (PDH) and 2-ketoglutarate (2-KGDH) dehydrogenase, and not due to inanition alone since pair-fed control rats did not show bradycardia until the agonal stage. Bradycardia was not the result of reduced energy since CP, ATP, ADP, and AMP levels remained normal even though PDH and 2-KGDH activity dropped to 20% of normal by …

A Taxonomic Investigation Of The Algae Of The Brigham Young University Campus, Provo, Utah, Cheng Mou-Sheng

Theses and Dissertations

A taxonomic investigation of the algal flora of the Brigham Young University campus was conducted from October 1971 to August 1972. This algal flora consisted of 27 genera and 36 species of Chlorophyta, 2 genera and 2 species of Euglenophyta, 32 genera and 106 species of Bacillariophyceae (including 16 genera and 33 species of soil diatoms), 1 genus and 2 species of Chrysophyta excluding diatoms and 6 genera and 14 species of Cyanophyta. Diatoms were the predominent algae in this study. Chlorococcum humicola, Vaucheria geminata, Amphora normani, Hantzschia amphioxys and Oscillatoria sancta were prominent in the greenhouses. In the arboretum …

Reproduction And Development Of Ferrissia Rivularis (Say) (Basommatophora: Ancylidae) And The Effects Of Maleic Hydrazide On Its Development And Fecundity, Yuan-Hsu Kang

Theses and Dissertations

Ferrissia rivularis was selected for research because of its local accessibility and because essentially nothing was known of its reproduction and development. Reproductive and developmental biology is first described herein from the natural environment. This is then compared with the effects created by experimental exposure to a selected herbicide, maleic hydrazide, which might be a potential threat to certain invertebrates in the natural environment.

Transforming Ability Of Bacillus Subtilis Dna Taken Up By Barley Embryos, Christine Tolman Ence

Theses and Dissertations

Purified Bacillus subtilis DNA taken up by one-day-old barley embryos and permanently fixed within the barley cell is shown to have maintained its biological activity in B. subtilis transformation. Cesuim chloride density gradient centrifugation of DNA isolated from the roots of barley embryos after the uptake and incorporation of radioactive, bromouracil-labelled B. subtilis DNA indicates the presence of the bacterial DNA in several discreet bands of well-defined density, whose density is changed by sonication. These preliminary findings concerning the fate of bacterial DNA taken up by barley roots are discussed in terms of the recombination model of Ledoux and Huart …

|Ni.|Pa Calorimetric Study Of The Heat Of Ionization Of Water At 10 And 40°C, And,|Nii.|Pa Calorimetric Determination Of The Heat Of Reaction Of Tris (Hydroxymethyl) Aminomethane (Tham) With Hydrochloric Acid In Aqueous Solution At 10, 25, And 40°C, Griffith Lyn Kimball

Theses and Dissertations

The heat of neutralization, ΔH_-N, of perchloric acid with sodium hydroxide has been determined at 10 and 40° in a low ionic strength, μ, region using a nonisothermal, constant-temperature-environment solution calorimeter. Correction of the data to infinite dilution by extrapolation of a plot of ΔH_-N vs μ^0.5 gives values at zero ionic strength for the heat of ionization of water of 14.216 and 12.695 kcal/mole, respectively, at 10 and 40° . The data are correlated with those of earlier workers to give an equation allowing the calculation of the heat of ionization of water at zero ionic strength over the …

The Determination Of Thiamin And Its Derivatives In Brain Tissue Of Control, Thiamin-Deficient, Oxythiamin- And Pyrithiamin-Treated Rats, David S. Murdock

Theses and Dissertations

The determination of total thiamin, free thiamin, thiamin di phosphate (TDP) plus thiamin triphosphate (TTP), and total α- hydroxyethylthiamin (HET) levels in rat brain in control, deficient, oxythiamin- (OTH) and pyrithiamin- (PTH) treated rats was accomplished. It was found that the TDP + TTP/thiamin ratio observed in the thiamin-deficient, OTH- and PTH-treated rats was constant and did not differ from the ratio observed in the control rat brains. The brain levels of TDP + TTP decreased to 39% and 12% of the control thiamin levels in deficient and PTH-treated rats respectively. The brain HET and TDP + TTP levels of …

The Effect Of Ethanol Ingestion On Liver Microsomal Phosphatidyl Choline Biosynthesis., David Nelson Skurdal

Theses and Dissertations

No abstract provided.

The Effect Of Aflatoxin B1 On Growth Rate And Iron Metabolism In Juvenile Mongolian Gerbils (Meriones Unguiculatus), William Stanley Hastings Jr.

Theses and Dissertations

The metabolic secretions from Aspergillus flavus, aflatoxins. are often found as contaminants of agricultural products used for human and animal consumption. Aflatoxin B1 is the most toxic and carcinogenic of the aflatoxins. A reduction in weight gain has been observed when juvenile animals are fed aflatoxin B1 over an extended period of time. This reduction in weight gain may possibly result from an anemic condition induced by an alteration of iron absorption and/or distribution. The effect of chronic sublethal levels of this hepatocarcinogen on weight gain and the uptake and distribution of 59Fe++ were studied in this investigation.

An experimental …

Part I: Silver Complexes As Adsorbents In Gas-Solid Chromatography. Part Ii: The Attempted Analysis Of Sulfa Drugs By Gas Chromatography., Samuel Harold Givand

Theses and Dissertations

No abstract provided.

Internal And External Control As A Personality Variable Related To Major In Graduate School, Shahin Ghazi-Tehrani

Theses and Dissertations

No abstract provided.

The Linings Of The Spinal Subarachnoid Space In The Dog As Revealed By Scanning Electron Microscopy, Miles W. Cloyd

Theses and Dissertations

No abstract provided.

Effect Of Lithium On Structure And Function Of The Rat Biliary System, Larry P. Larson

Theses and Dissertations

No abstract provided.

A Burkeian Analysis Of The Speaking Of Adlai E. Stevenson Ii Before The United Nations October 25, 1962, Mary L. Crocker

Theses and Dissertations

No abstract provided.

Pattern Of Watershed Enrichment And Its Effects On Nutrient Budgets And Weed Growth In A Culturally Eutrophied Lake, Stanley James Miekicki

Theses and Dissertations

No abstract provided.

The Feasibility Of Cooperative Staff Utilizations Of Five Rural Public School Districts Of Kittson County In Northwestern Minnesota, William R. Nachatilo

Theses and Dissertations

No abstract provided.

Habitat Preferences Of Three Species Of Cricetid Rodents In A Patchy Environment, David H. L Olson

Theses and Dissertations

No abstract provided.

Spinal Nerve Root Exits From The Subarachnoid Space In The Dog, John J. Malloy

Theses and Dissertations

No abstract provided.

Information Need, Form, Source, And Use As Perceived By Elementary Educators., Ronald M. Torgeson

Theses and Dissertations

No abstract provided.

A Systematic Study Of The Formica Obscuriventris Subgroup, With Notes On Colony-Founding In The Formica Rufa Group (Hymenoptera: Formicidae)., Akey Chang-Fu Hung

Theses and Dissertations

No abstract provided.

Guidelines And Recommendations For Business Teacher Education Curriculum Improvement For Central Washington State College, Ellensburg, Based On A Critical Analysis By Graduates Of The Program., Lloyd Antone Swenson

Theses and Dissertations

No abstract provided.

The Concept Of Communication In The Existential Philosophy Of Karl Jaspers, Maxine K. Rasmussen

Theses and Dissertations

The major purpose of this study was to clarify the meaning of communication in the existential philosophy of Karl Jaspers. The study also attempted to relate communication to the process of existential counseling.The study began with an introduction to existential philosophy in order to place Jaspers’ writings in the perspective of the existential movement. A biographical sketch of Karl Jaspers was also presented, as well as an overview of his philosophical method.Next, the concepts of Existenz, history, and freedom were developed as preconditions to existential communication.Then the concept of communication was considered. The problem of communication towered over Jaspers’ philosophical …

A Comparison Between Boys' Interscholastic Sport Programs And Girls' Interscholastic Sport Programs In The High Schools Of The State Of Minnesota, Susan L. Brewer

Theses and Dissertations

No abstract provided.