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The Effect Of Chemical Adjuvants Of The Survival Of The Free-Living Stages Of The Gastrointestinal Nematode, Haemonchus Contortus, Anthony T. Chang Aug 1969

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 …

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Surface Characteristics Of Conidia From Monosporous Cultures Of Penicillium Digitatum And Aspergillus Nidulans Var. Echinulatus, Raymond Kunito Fuji Aug 1969

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 …

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A Study Of Folic Acid Dependent Reactions In Bovine Brain, Dillard Spencer Broderick Aug 1969

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 …

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Comparative Effects Of Carbon Dioxide On Coccidian Oocysts From Five Different Host Species, Thomas David Bunch Aug 1969

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.

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Analytical Study Of Heat Conduction And Thermal Stress In Solids With Pressure Dependent Contact Resistance, Dhruvkumar S. Patel Aug 1969

Analytical Study Of Heat Conduction And Thermal Stress In Solids With Pressure Dependent Contact Resistance, Dhruvkumar S. Patel

Theses and Dissertations

In the usual thermal stress analysis of a body, the stresses are found for a predetermined temperature distribution. In problems involving composite materials, thermal contact resistance between materials can significantly affect the temperature distribution. The contact resistance is normally a function of the contact pressure and thermally induced stresses can affect the temperature distribution. Thus in composite bodies the thermal stress problem and the heat transfer problem may be coupled and require a simultaneous solution of both problems.

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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 Aug 1969

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 …

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Phylogenetic Relationships Of Purshia Tridentata And Cowania Mexicana, Stewart C. Sanderson Aug 1969

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.

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The Catalytic Hydrogenation Of Benzodiazines.|Ni.|Pphthlazine.|Nii.|Pquinazoline, Danny Lee Elder Aug 1969

The Catalytic Hydrogenation Of Benzodiazines.|Ni.|Pphthlazine.|Nii.|Pquinazoline, Danny Lee Elder

Theses and Dissertations

Quinazoline and phthalazine were hydrogenated at low pressure and temperature (60 psi, room temperature) and high pressure and temperature (2000 psi, 100°C, 150°C} in neutral and acidic solvents over 5% Pd/C, 5% Ru/C, 5% Rh/Al2O3 , 5% Rh/C, and 5% Pt/C. Chromatographic methods for determining the qualitative and quantitative composition of hydrogenation mixtures were developed. The compositions of quinazoline and phthalazine-hydrogenation mixtures were determined. Eight phthalazine-hydrogenation products were detected and isolated: (1) 1,2-dihydrophthalazine, (2) 1,2,3,4-tetrahydrophthalazine, (3) a,a'-diamino-o-xylene, (4) o-methylbenzylamine, (5) 1,3-dihydroisoindole, (6) o-xylene, (7 and 8) cis- and trans- 1,2-dimethylcyclohexane. These products were identified by isolating them from reaction mixtures …

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Water Injection In An Automobile Gas Turbine Combustion System, Billy Ray Jackson Aug 1969

Water Injection In An Automobile Gas Turbine Combustion System, Billy Ray Jackson

Theses and Dissertations

"GENTLEMEN, JUNK YOUR ENGINES!" This title of a recent periodical article [1]* catches some of the expectation for the wedding of the Automobile and the Gas Turbine, The nuptials cannot be completed though, unless two problems are overcome: 1) high fuel consumption, and 2) high operating temperature. The first problem is solvable by the use of heat regeneration and much work has been done in this area [2][3] [4]. The solution of the second problem of high operating temperature was the basis for this thesis. The method of solution was by water injection into the combustion gases prior to entrance …

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Fossil Chelonians, Chrysemys And Clemmys, From The Upper Pliocene Of Idaho, G. R. Zug Jul 1969

Fossil Chelonians, Chrysemys And Clemmys, From The Upper Pliocene Of Idaho, G. R. Zug

Great Basin Naturalist

No abstract provided.

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Notes On The Distribution And Bionomics Of Some Idaho Cerambycidae (Coleoptera), William F. Barr, Richard L. Penrose Jul 1969

Notes On The Distribution And Bionomics Of Some Idaho Cerambycidae (Coleoptera), William F. Barr, Richard L. Penrose

Great Basin Naturalist

No abstract provided.

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Overwintering Phytoseiid Mites In Central Utah Apple Orchards, John W. Leetham, Clive D. Jorgensen Jul 1969

Overwintering Phytoseiid Mites In Central Utah Apple Orchards, John W. Leetham, Clive D. Jorgensen

Great Basin Naturalist

No abstract provided.

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An Albino Pacific Tree Frog, Hyla Regilla, From Death Valley, California, Fenton R. Kay Jul 1969

An Albino Pacific Tree Frog, Hyla Regilla, From Death Valley, California, Fenton R. Kay

Great Basin Naturalist

No abstract provided.

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End Matter, Vol. 29 No. 2 Jul 1969

End Matter, Vol. 29 No. 2

Great Basin Naturalist

No abstract provided.

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Front Matter, Vol. 29 No. 2 Jul 1969

Front Matter, Vol. 29 No. 2

Great Basin Naturalist

No abstract provided.

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The Ecology Of The Western Spotted Frog, Rana Pretiosa Pretiosa Baird And Girard, A Life History Study, Ronald L. Morris, Wilmer W. Tanner Jul 1969

The Ecology Of The Western Spotted Frog, Rana Pretiosa Pretiosa Baird And Girard, A Life History Study, Ronald L. Morris, Wilmer W. Tanner

Great Basin Naturalist

No abstract provided.

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Full Issue, Vol. 29 No. 2 Jul 1969

Full Issue, Vol. 29 No. 2

Great Basin Naturalist

No abstract provided.

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Individual Rodent Movements In Upper Sonoran Desert Of Central Nevada, Jon Ghiselin Jul 1969

Individual Rodent Movements In Upper Sonoran Desert Of Central Nevada, Jon Ghiselin

Great Basin Naturalist

No abstract provided.

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Spiders Of The National Reactor Testing Station, Dorald M. Allred Jul 1969

Spiders Of The National Reactor Testing Station, Dorald M. Allred

Great Basin Naturalist

No abstract provided.

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Mechanism Of Water Transport Through Reverse Osmotic Membranes, Cheryl Kay Murphy Jul 1969

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 …

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The Identification Of A Germination Factor For Basidiospores Of Psilocybe Mutans, Neal K. Van Alfen Jul 1969

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. …

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Inhibition Of Asexual Reproduction In Planaria, Lewis Hafen Leavitt Jul 1969

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 …

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Guest Editor's Prologue, Truman G. Madsen Jul 1969

Guest Editor's Prologue, Truman G. Madsen

BYU Studies

No abstract provided.

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How Authentic Are Mormon Historic Sites In Vermont And New York?, T. Edgar Lyon Jul 1969

How Authentic Are Mormon Historic Sites In Vermont And New York?, T. Edgar Lyon

BYU Studies

No abstract provided.

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Circumstantial Confirmation Of The First Vision Through Reminiscences, Richard Lloyd Anderson Jul 1969

Circumstantial Confirmation Of The First Vision Through Reminiscences, Richard Lloyd Anderson

BYU Studies

No abstract provided.

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Full Issue, Byu Studies Jul 1969

Full Issue, Byu Studies

BYU Studies

No abstract provided.

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Introductory Pages, Byu Studies Jul 1969

Introductory Pages, Byu Studies

BYU Studies

No abstract provided.

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Mormon Origins In New York: An Introductory Analysis, James B. Allen, Leonard J. Arrington Jul 1969

Mormon Origins In New York: An Introductory Analysis, James B. Allen, Leonard J. Arrington

BYU Studies

No abstract provided.

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A Stained-Glass Replica Of Joseph Smith's First Vision, Byu Studies Jul 1969

A Stained-Glass Replica Of Joseph Smith's First Vision, Byu Studies

BYU Studies

No abstract provided.

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Awakenings In The Burned-Over District: New Light On The Historical Setting Of The First Vision, Milton Vaughn Backman Jr. Jul 1969

Awakenings In The Burned-Over District: New Light On The Historical Setting Of The First Vision, Milton Vaughn Backman Jr.

BYU Studies

No abstract provided.

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