Digital Commons Network^™

Biotin Production And Utilization In Certain Natural Environments, Gordon M. Fillipi

Theses and Dissertations

No abstract provided.

An Anthropometric Study Of Boys Participating In The University Of North Dakota Summer Sports School, Allen J. Curran

Theses and Dissertations

No abstract provided.

The Effects Of Culture Age And Varying Biotin Levels In The Growth Medium On Biotin Transport In Lactobacillus Plantarum, Joy K. Anderson

Theses and Dissertations

No abstract provided.

Light Mediated Chlorophyll A Synthesis In A Chlorella Mutant, Terrance J. Gleason

Theses and Dissertations

No abstract provided.

A Ferro-Vitreous Society : The Great Exhibition Of 1851 As A Manifestation Of Mid-Victorianism, Ronan R. Hope

Theses and Dissertations

No abstract provided.

The Effect Of Hydrocortisone On Extracellular Connective Tissue Fibrils In The Early Chick Embryo: A Study In Fine Structure., Edward Clarence Carlson

Theses and Dissertations

No abstract provided.

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 …

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 …

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 …

Comparative Effects Of Carbon Dioxide On Coccidian Oocysts From Five Different Host Species, Thomas David Bunch

Theses and Dissertations

Excystation, as applied to the coccidia, is the process by which sporozoites are released from sporocysts and oocysts. Although this process has long been a subject of interest and study, there still remains considerable disagreement among investigators as to the mechanism by which the process occurs and the factors which are involved.

The Identification Of A Germination Factor For Basidiospores Of Psilocybe Mutans, Neal K. Van Alfen

Theses and Dissertations

Basidiospores of the Basidiomycete Psilocybe mutans have been found to germinate only in the presence of water extracts of animal dung. The chemical nature of the factor present in the dung that induces germination is not known, nor has it ever been isolated· Experiments showed that extracts of bile salts cause the basidiospores to germinate, indicating that since bile salts are found in dung, they may be the factor which stimulates the spores to germinate. Investigations of the properties of the factor in dung show that the factor has solubility properties that are similar to those of the bile acids. …

A Revision Of Cryptantha Subgenus Oreocarya, Larry Charles Higgins

Theses and Dissertations

This study is a taxonomic revision of Cryptantha subgenus Oreocarya (Boraginaceae), together with descriptions of species, synonyms, distribution maps, and discussions. The present treatment recognizes fifty-seven species and fourteen varieties, all separated by means of a comprehensive key. A history of the group, along with a discussion of the distribution, ecology, and phylogeny is presented. As a basis for the comparison of taxa much of the research has been concentrated on morphological variation in herbarium specimens. Particular attention has been directed to a study of pubescence types, branching patterns, flowers, calyces, and the fruit. The herbarium research has been correlated …

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 …

Some Hematological Values Of Eleven Species Of Amphibians And Reptiles, Dennis J. Gemmell

Theses and Dissertations

No abstract provided.

An Autoradiographic Study Of Tritiated-Thymidine Uptake In The Mitral Valve Of Prenatal And Postnatal Rats, Peter D. Johnson

Theses and Dissertations

No abstract provided.

Effect Of Ethanol Ingestion On Liver Mitochondrial And Microsomal Phosphatidyl Choline Fractions, Mary F. Miller

Theses and Dissertations

No abstract provided.

Effect Of Coal Derived Humic Acid On Growth And Chlorophyll Content Of Chlorella Vulgaris, Charles J. Brown

Theses and Dissertations

No abstract provided.

The Growth Rate Of The Tooth Germ In Newly-Born Rats Injected With Cortisone Acetate, Tetsuo Nakamoto

Theses and Dissertations

No abstract provided.

Some Cytochemical Aspects Of The Red Pulp Sinus Lining Cells Of The Normal And Stimulated Rabbit Spleen., Michael Jens Snodgrass

Theses and Dissertations

No abstract provided.

A Model System For The Deacylation Of Acylenzymes, Raymond Shih-Chao Sun

Theses and Dissertations

No abstract provided.

An Ecologic Study Of An Overloaded Oxidation Lagoon Containing High Populations Of Purple Sulfur Bacteria, Harvey W. Holm

Theses and Dissertations

Concomitant with the addition of large amounts of potato starch wastes to the Grafton, North Dakota, municipal sewage lagoon was the development of a new major microbial population, the purple sulfur bacteria. This study attempts to define ecologic relationships of the lagoon, with special emphasis placed on the action of purple sulfur bacteria in the lagoon.

Chemical changes in the lagoon were investigated by monitoring Biochemical Oxygen Demand (BOD), sulfide, sulfate, phosphate, pyruvate, total carbohydrates, volatile acids, alkalinity, and pH. Lagoon water temperatures were observed daily. Microbial ecologic relationships were deduced by enumerating coliforms, fecal conforms, enterococci, total bacteria (TGE …

The Effect Of Captivity On Adrenocortical Activity In The Meadow Vole, Douglas E. Olsen

Theses and Dissertations

No abstract provided.

The Ecology Of A Small Population Of Ruffed Grouse Bonasa Umbellus (Linnaeus) In A Northern Hardwood Forest., Charles William Bruton

Theses and Dissertations

No abstract provided.

Biographic, Cognitive, Demographic And Personality Differences Between Adolescents From Families With Identifiable Alcohol Problems And From Families Without Identifiable Alcohol Problems., Mary Leo Kammeier

Theses and Dissertations

No abstract provided.

The Effects Of Amino Acids, Inhibitors And Substrates On The Thermal Stability Of Microsomal Glucose 6-Phosphate Phosphohydrolase, Su Mei Huang

Theses and Dissertations

No abstract provided.

A Study Of The Activity Of Erythrocyte Carbonic Anhydrase Exposed To A High Pressure Gas Environment, Roderick L. Reinke

Theses and Dissertations

No abstract provided.

Studies On The Purification, Catalytic And Physicochemical Properties, And Biosynthesis Of Sugar Phosphate Phosphohydrolase In Neisseria Meningitidis., Joseph Robin Sowokinos

Theses and Dissertations

No abstract provided.

Rat Kidney Glycerylphosphoryl Choline Diesterase., Jerry Joseph Baldwin

Theses and Dissertations

No abstract provided.

Fine Structure And Permeability Of Developing Blood Vessels In The Chicken Brain., Richard George Peterson

Theses and Dissertations

No abstract provided.