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Herpetological Distribution And Life History Notes For Hawaii And Western North America, J. Robert Mcmorris

Great Basin Naturalist

No abstract provided.

End Matter, Vol. 30 No. 2

Great Basin Naturalist

No abstract provided.

Front Matter, Vol. 30 No. 2

Great Basin Naturalist

No abstract provided.

Comments On Lesquerella Hitchcockii, James L. Reveal

Great Basin Naturalist

No abstract provided.

A Preliminary Report On The Algal Species Presently Found In Utah Lake, William J. Harding

Great Basin Naturalist

No abstract provided.

Richardson's Ground Squirrel (Spermophilus Richardsonii) In The Laramie Basin, Wyoming, Tim W. Clark

Great Basin Naturalist

No abstract provided.

The Rattlesnake Crotalus Atrox In Southern Nevada, B. B. Andersen, F. H. Emmerson

Great Basin Naturalist

No abstract provided.

Full Issue, Vol. 30 No. 2

Great Basin Naturalist

No abstract provided.

A Taxonomic Comparison Of Uta Stansburiana Of The Great Basin And The Upper Colorado River Basin In Utah, With A Description Of A New Subspecies, Lloyd E. Pack Jr., Wilmer W. Tanner

Great Basin Naturalist

No abstract provided.

Osteological And Mylogical Comparisons Of The Head And Thorax Regions Of Cnemidophorus Tigris Septentrionalis Burger And Ameiva Undulata Parva Barbour And Nobel (Family Teiidae), Don Lowell Fisher, Wilmer W. Tanner

Brigham Young University Science Bulletin, Biological Series

The anterior osteological elements of the skull, lower jaw, and wrist along with the anterior myological characters discussed and figured in this report suggest that A. u. parva and C. t. septentrionalis are members of distinct groups which can be differentiated by internal morphologic characters. Although comparisons were restricted to highly geographically separated individuals of the same family, their general body form and structure appear to be similar.

A great number of anatomical structures are shared in common, but the significant differences between them include:

1. General skull appearance. The skull of C. is generally lighter, that is the bones …

Pinyon-Juniper Succession After Natural Fires On Residual Soils Of Mesa Verde, Colorado, James A. Erdman

Brigham Young University Science Bulletin, Biological Series

A mountain brush vegetation typified by Gambel oak (Quercus gambelii) and serviceberry (Amelanchier utahensis) dominates the uplands of Mesa Verde National Park. There is evidence that this brush element is a successional stage that has been maintained by repeated natural fires in a large part of the Mesa Verde landscape. This study was conducted to determine the role of fire in the region's ecology, the nature of the climax pinyon pine (Pinus edulis) and Utah juniper (Juniperus osteosperma) vegetation, and the major successional stages that lead to the climax condition.

Three postburn …

End Matter, Vol. 11 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Temperature Protection For Fruit Trees By Air-Supported Plastic Structures, Ram T. Gadhavi

Theses and Dissertations

The greatest weather enemy in all fruit destruction is the late spring frost which moves across the country under the high pressure areas that are occasionally seen on the weather maps, and kills the fruit buds.

Preparation Of New Amino-, Thio-, And Sulfonyladamantane Derivatives, Joseph Craig Argyle

Theses and Dissertations

Various synthetic schemes were used to prepare a number of new amino-thio- and sulfonyladamantane compounds. By a nucleophilic substitution on 1-bromoadamantane, 1-(p-nitrophenylthio)adamantane was prepared from p-nitrothiophenol; the amino- and sulfonyl- derivatives of this compound were also prepared. Silver tosylate was used to generate the 1-adamantyl carbonium ion from 1-bromoadamantane in a synthetically useful procedure for preparing 1-adamantylamides from nitriles. Three 1-(1-adamantylcarbinyl)-2,5-dialkylpyrroles were prepared by Knorr-Paal reactions and reduced to the corresponding pyrrolidines. Thio- and aminomethyl 1-adamantyl ketones were prepared from methyl and bromomethyl 1-adamantyl ketones, respectively. Aliphatic and aromatic oxiranes were reacted with 1-aminoadamantane in a bomb at elevated temperatures …

Front Matter, Vol. 11 No. 2

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

End Matter, Vol. 11 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

The Reactivity And Selectivity Of The Reaction Of Sulfur Trioxide And Bromobenzene, Sullivan E. Blau

Theses and Dissertations

The sulfonation of bromobenzene with sulfur trioxide in liquid sulfur dioxide at -12 to -13° C. was studied to determine its relative reactivity. The relative rate constant ratio, kbenzene/kbromobenzene, was found to be 28.6 in a competitive reaction between benzene and bromobenzene. The isomer distribution was found to be 0.15 ± 0.02% for the meta, 0.91 ± 0.04% for the ortho and 98.93 ± 0.14% for the para isomers. The partial rate factors were calculated to be pf= 0.208, of= 0.0096 and mf = 0.00018. The relative rate data exhibited a distinctive behaviour previously noted in related systems, possibly due …

High Pressure Spectral Chemistry Of Selected Organic Compounds, Frank William Linsley

Theses and Dissertations

The series of compounds indicated by the formular C_6H_5-(CH=CH)n-C_6H_5 change in color from white (colorless) to yellow to orange to red to deep red as n increases from 1 to 12. Stilbene is the first compound of this series (n=1). Under pressure, exerted by a diamond anvil press, stilbene can be seen to change color from white to yellow to red as increasing pressure is applied. Similar color changes are observed for the compounds where n=2,3, and 4 when subjected to similar pressure. This study records and reports the spectra versus pressure for these compounds.

Particle Dynamics In The Mixing Of A Particle-Laden Stream With A Secondary Stream In A Duct, William Doyle Cranney

Theses and Dissertations

The purpose of this thesis is to review the history and discuss the present work being done in particle-gas flow, with application to air- augmentation of a particle-carrying, fuel-rich gas jet. A drawing of the model considered is shown in Figure 1, with the area of interest labeled. The thesis is intended as a thorough literature review and analysis.

Determination Of Effective Strain For The Strainhardening Of Aluminum Subjected To Completely Reversed Strain Combinations, Navin M. Patani

Theses and Dissertations

It is known that subrecrystallization plastic deformation increases the strength of a metal. The amount of strengthening that may be acquired can be approximated using a strainhardening equation and a simple given strain. The purpose of this thesis was to determine the effective strain for predicting strainhardening for annealed aluminum subjected to completely reversed strain combinations.

A Survey Of Literature On The Pyrolysis Of Wood And Other Cellulosic Solids, Kenneth P. Sasine

Theses and Dissertations

The study of the ignition of wood and other cellulosic materials has resulted in the publication of a large amount of literature. As an aid in the planning and interpretation of future research, it was felt that a survey of a representative body of literature should be made. With this as its motivation, the present work was initiated.

Triaxial Stress Effects In Weldments Associated With The Heat Affected Zone, Rohit A. Mehta

Theses and Dissertations

The welding of steel occupies an important place as a major fabricating process in industry. The welding of steel has been a subject of research for many years, and much information has been obtained about the strength of weldments.

Calorigenic Effects Of Thyroxine And Triiodothyronine On Rat Diaphragm., Robert Lee Chambers

Theses and Dissertations

Since the isolation of triiodothyronine (T3) by Pitt-Rivers and Gross (1953) several questions as to its role as a thyroid hormone arose. Does T3 have the same or different actions than that of thyroxine (T4 )? Is T3 an emergency hormone, since its synthesis relative to T4 is greatly increased during periods of low iodine intake and its response time is I/5th that of T4 (Ackerman and Arons, 1958)? Are there any interactions modifying their respective actions?

The Synthesis And Properties Of New Potentially Chemotheraputic [Sic] Pteridine Derivatives, Walter Wesley Parish

Theses and Dissertations

A new general synthetic method for the preparation of 6-thiopteridines has been developed. The method involves the addition of thiols to intermediate pyrimidine nitrones formed in situ by the reaction of 4-amino-5-nitrosopyrimidines with pyridinium-activated acetonitriles, acetates, acetophenones, and other methylketones. Ca. forty new pteridines were prepared by this method. The preparation of six new 6-pteridinyl ketones, two new 6- pteridinyl ketone thiosemicarbazones, and two new 6-sulfonylpteridines and their 4-acetamido derivatives is also reported. 4-Acetamido-2- amino-7-phenylpteridine 5-oxide was prepared by the reaction of 2- amino-4,6-diacetamido-5-nitrosopyrimidine with either phenylsulfonyl-acetophenone or phenacylpyridinium bromide. Evidence relating to the structure of the acylated 4-amino-5- nitrosopyrimidines …

Front Matter, Vol. 11 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

A Feasibility Study Of The Application Of Bondgraph Modeling And Computerized Nonlinear Model Parameter Identification Techniques To The Cardiovascular System, Randall L. Taylor

Theses and Dissertations

Recent years have witnessed an increasing trend for people in the medical and engineering professions to couple their talents in a more united effort to better understand the functioning of the human body. This union of technologies has meant the introduction of new viewpoints and techniques in the field of physiological research. The engineers' basic tool, mathematical modeling, has perhaps been one of the most noticeable additions. There has been a significant amount of work done in recent years along these lines of deriving mathematical models to express the functioning of a subsystem of the body, and then, using analog, …

An Investigation Of A Computer Technique For Determining The Characteristic Parameters Of A Viscoelastic Model With Hysteresis Effects From Transient Experimental Data, Stephen Jack Clark

Theses and Dissertations

The object of this work was to develop a computer technique for determining the characteristic parameters of spring-mass system with hysteresis effects from transient experimental data. The technique was intended to be utilized to determine the parameters of models of systems where complex geometry and rate dependent properties would make a determination of the model parameters most difficult, and where the parameters typically obtained from static test would not characterize the rate dependent properties accurately.

A Survey Of The Helminth Parasites And Coccidia Of Cattle And Sheep In Utah Valley, Joseph Carl Fox

Theses and Dissertations

A survey of gastro-intestinal parasites in cattle and sheep in Utah Valley was conducted. Cattle in the valley were not seriously parasitized by helminths, whereas sheep usually had heavy helminth infections. Ten genera of helminths and 8 species of coccidia were identified in cattle in the valley, and 14 genera of helminths and 8 species of coccidia were identified in sheep. In conjunction with the survey, meteorologic studies were conducted May through September, 1909, to ascertain the effects which irrigation had upon micro-environments on grass pastures in relation to the development of free-Iiving stages of gastro-intestinal nematodes of ruminants. The …

A Comparison Of Vegetation Changes In A Mountain Brush Type After Grazing And Protection From Grazing During Thirty-Seven Years, Jerry William Thomas

Theses and Dissertations

The mountain brush type in Utah was studied in 1932, 1942, and 1969 to determine the vegetation changes and trends after grazing and protection from grazing for 37 years. Analyses for cover, frequency and composition percentages, production and plant counts were made on fifty 100 square-foot plots in a ten-acre exclosure and on a five-acre grazed area adjacent to the exclosure. Production, cover and composition percentages for good and fair forage species of grasses and browse have decreasesed on the grazed plots whereas they generally increased in the ungrazed plots. Forbs of intermediate forage value have increased in production, cover …

Donor Properties Of Dimethylsulfoniumcyclopentadienylide And Tetramethylenesulfoniumcyclopentadienylide In Metal Complexes ; Part Ii. The Attempted Preparation Of Boron Tricyanide, Gary Scott Barney

Theses and Dissertations

Part I.--Complexes of dimethylsulfoniumcyclopentadientylide and tetramethylenesulfoniumcyclopentadienylide with metal ions were studied in order to determine the coordination site on the ylids. Infrared spectra indicate that the ylids are coordinated through the cyclopentadienyl ring in all complexes except for the Hg(CN)2 complexes. Coordination-of the HgI2, CdI2, ZnCl2, and AgNO3 complexes is through the number one position on the ring as suggested by NMR data. Infrared and NMR data strongly indicate that the ylids in the Hg(CN)2 complexes are coordinated through sulfur. Part II.--The only method given in the chemical literature for the preparation of boron tricyanide could not be duplicated in …