Life Sciences Commons^™

The Effects Of Phosphorus-32 On The Larval Stages Of Paramphistomum Microbothrioides., Thomas Byrnes Weber

LSU Historical Dissertations and Theses

No abstract provided.

A Test Construction Study Of Sport-Type Motor Educability For College Men., Arthur R. Adams

LSU Historical Dissertations and Theses

No abstract provided.

Biological Factors Involved In The Absenteeism Of Children From Stockton Public Schools, Fae-Belle Coudeyre

University of the Pacific Theses and Dissertations

Every state has a compulsory school attendance law, and yet at any time during the school year approximately 12 percent of the children will not be in school - cannot very well be in school, because of some physical, mental, or emotional handicap, either temporary or permanent.

These absentees are what are now often called the “exceptional” children, including the blind and partially-blind, the deaf and hard-of-hearing, the speech-defective, the crippled, the delicate, the epileptic, the mentally deficient, those with serious social maladjustments, together with those who are temporarily out of school because of a disease or accident. The total …

Biological Oxidation Of Copper Sulfide Minerals, Delmar Boyd Davis

Theses and Dissertations

This work represents a study of the biological oxidation of copper sulfide minerals. The principal objective of the study was to determine the extent of bacterial oxidation on copper containing sulfide minerals. It was also desired to determine if the bacteria could oxidize copper sulfides in the absence of iron. A better understanding of the nitrogen requirements of the organisms was desired. Minerals used in this study were Bingham Canyon Float Concentrate, chalcopyrite, covellite, calcocite, bornite, tetrahedrite, and reagent grade copper sulfide. The bacteria used were obtained from the mine waters of Bingham Canyon, Utah. To study the problem the …

The Skeletal Anatomy Of Several Species Of Salamanders With Special Reference To Bolitoglossa Rufescens (Cope), Afton M. Hansen

Theses and Dissertations

This paper deals with the complete skeletal anatomy ot Bolitoglossa rufescena (Cope). All parts are figured and described. In addition to this many of the main skeletal parts of Bolitoglossa platydactyla (Cuvier) Bolitoglossa occidentalis Taylor, and Bolitoglossa flaviventris (Schmidt) are described and figured. A comparison of the following parts of the above mentioned salamanders is presented: skull, atlas, ninth trunk vertebra, sixth caudal vertebra, carpals, tarsals and digits. The similarities and differences are pointed out as they appeared to the author. The relationship and specialization ot these species is discussed rather briefly.

Some Preliminary Studies Of Rocky Mountain Spotted Fever Vectors In Utah, Marvin Dale Coffey

Theses and Dissertations

That the tick, Dermacentor andersoni Stiles, was the vehicle of transmission for the disease Rocky Mountain spotted fever was first suggested by Wilson and Chowning (1902). The disease itself has been recognized since 1873, being first known from the Bitter Root Valley of Montana. The first medical record, however, was reported from Idaho by Wood (1896).

A Cytotaxonomic Study Of New Mexico Thelesperma, Andrew Marion Torres

Biology ETDs

This study has been an attempt to collect, to identify, and to classify the four New Mexico species of Thelesperma on the basis of morphology and chromosome number. In addition, an attempt has been made to analyze the morphology of the chromosomes with respect to their evolution.

The Effect Of Some Variables On The Numerical Evaluation Of Printing Quality, James G. Dunlap Jr.

Paper Engineering Senior Theses

Introduction

The desire for specific information concerning those qualities of paper, which tend toward satisfactory results in printing, has become of great interest to papermakers and paper consumers. To the paper mill, this information is important in preventing the production of unsatisfactory printing paper. To the printer, such information enables him to determine unsatisfactory paper before it reaches the presses, and also permits him to tell the papermaker in advance the characteristics that are desired in the paper.

Influence Of Additives Upon The Viscosity Of Concentrated Deinking Waste, Richard J. Drexel

Paper Engineering Senior Theses

The literature survey reveals little information relating directly to deinking waste. This waste is composed mostly of coating and filling pigments such as clays and calcium carbonate therefore a study was made along these lines. Hauser (8), and other colloidal chemist, generally agree that clay and other pigment suspensions can be dispersed with certain chemical additives. This is said to be attributed to the active forces of repulsion between the particles which in turn produce a marked effect upon the flow properties. Further studies reveal that the Hercules Hi-Shear viscometer has been useful in analyzing high solids pigment suspensions which …

Polyvinyl Acetate Lattices As Adhesives For Pigment-Coated Paper, Robert L. Harney

Paper Engineering Senior Theses

In recent years, the possibility of using synthetic latices as adhesives in the paper coating industry has caused much interest. The manufacturers of latices uncovered a new market by fostering developmental research in the field of pigment coating binders. Polyvinyl acetate latices were one of the group of products studied in this manner.

In the past, experts in the field of coating believed that synthetic latices could contribute substantial improvements to some optical properties of coated papers over and above that of conventional adhesives. It was also felt that synthetic latices could exhibit higher pigment binding power than conventional adhesives. …

Supercalender Variables (I) The Effect Of Supercalender Pressure On The Physical Characteristics Of Paper, Kenneth L. Maves

Paper Engineering Senior Theses

This work is concerned with the effect of supercalender pressures on the physical properties of paper.

The literature survey shows that very little work has been published concerning the effect of the variables of supercalendering on paper. In this investigation, a study is made of the effect of varied supercalendering pressures on 50 percent rag ledger and coated folder paper. The experimental results show that definite trends were established on physical strength and optical properties when supercalender pressure w as increased.

A Comparison Of The Color Stability Of Certain Rosin Sizing Agents As Influenced By Light And Iron, Raymond L. Janes

Paper Engineering Senior Theses

A literature survey is presented concerning the yellowing of paper with age and the relationships of rosin, light, and iron as factors in inducing this discoloration. The recent chemical modifications of rosin which are applicable for use in the sizing of paper are investigated with the intent of discerning whether or not they exhibit sufficient improvement in color-brightness stability over that of natural rosin to warrant their use in certain high quality papers.

The experimental results indicated only one rosin modification, "Foral", a fully-hydrogenated rosin, having a marked advantage over natural rosin with regard to brightness stability as affected by …

Size Tests Applicable To Writing Surface Versus Aqueous Inks, Md. Mozammel Haque

Paper Engineering Senior Theses

Introduction

Some paper, because of their use requirements are required to be porous and absorbent to liquids, particularly water. Examples of these papers are paper towels, blotters and filter paper. Most papers, however, are required to be resistant to the passage of acquous liquids or vapor. Writing papers, moisture resistant bags, waxed paper and many other classes of paper too numerous to mention fall into the latter groups of papers.

The required degree of resistance to the penetration of aqueous liquids or vapors is brought about through the process of sizing. Sizing may be defined as the addition of materials …

A More Rapid Routine Control Method For The Estimation Of Titanium Dioxide In Paper, Allen E. Uhl

Paper Engineering Senior Theses

A procedure is given for estimation of titanium dioxide in paper, whereby ashing the sample is omitted thru simultaneous destruction of the paper and solution of the titanium. This method is compared with the standard methods of analysis in regard to time required and precision.

Printing With Moisture Setting Inks. The Influence Of Varying Degrees Of Sizing And Varying Amounts Of Hardwood Fibers On The Printability Of Bleached Sulphate Sheets, Frank L. Yankoviak

Paper Engineering Senior Theses

The work on this thesis has been conducted for the purpose of investigating the effect of two variables on the printability of a bleached softwood sulphate sheet; using a moisture setting ink. The two variables are: (1) rosin sizing, (2) furnish, namely, varying amounts of bleached hardwood sulphate fibers.

Handsheets were made in the laboratory with four levels of rosin sizing. and increasing amounts of hardwood fibers. The amounts of hardwood fibers ranged from zero to 100 percent with two intermediate percentages.

The calendered handsheets were then printed and visually inspected for quality of printing obtained. Other tests. carried out …

A Preliminary Study Of The Effect Of Thyroxin On The Transport Of Glucose Across The Tubule Cells Of The Dog Kidney, Hayle Buchanan

Theses and Dissertations

The graduate studies of the writer began at Brigham Young University in the Autunm of 1951, at which time he filed his intention of majoring in Zoology and minoring in Chemistry. During the first three quarters he received instruction under his committee chairman in a sequence of courses entitled: "Body Fluids", "Neurology", and "Endocrinology". During the first of these three courses the role of the kidneys in the maintenance of a relatively constant internal environment was discussed. During the course in Endocrinology the following statement was found in the text which suggested that the thyroid hormone might have an influence …

The Spermatheca As A Taxonomic Aid In The Study Of Some Families Of Coleoptera, Lenord Daniel Moore

Theses and Dissertations

In this study, the spermathecae of sixty-eight species of Coleoptera, representing fifty-one genera and twenty-three families, were examined and are listed in the order they appear in Leng's Catalogue of the North American Coleoptera. An examination was made of ninety-five specimens of four different species to check for variation within the species. In only one species was there a departure from the pattern characteristic of the genus. Ther spermatheca is differentiated into the cornu, the nodulus and ramus. It is a sac in the female for the reception and storage of the spermatozoa until used for fertilizing the eggs. Among …

Comparative Nutritional Values Of Alfalfa And Red Clover Hay For Growing Dairy Calves, Scott Saunders

Tennessee State University Alumni Theses and Dissertations

No abstract provided.

Some Chernetid Pesudoscorpions From Mexico, Harold T. Neuberger

Biology ETDs

Included in the collection of chernetid pseudoscorpions from the American Museum of Natural History were found several individuals representing the species and records described herein as new. Much of the present material was taken from collections made by Clarence and Marie Goodnight in the central Mexico. After publication of data in the thesis, the specimens will be returned to the permanent collections of the American Museum of Natural History.

The Interrelation Of The Adrenal And Posterior Pituitary Glands In Water And Electrolyte Metabolism, Frederic A. Giere

Biology ETDs

The secretions of the adrenal medulla account for many of the instantaneous responses of the animal body to various stimuli, but it has not been established that such secretions play any significant role in the endocrine regulation of salt and water metabolism. On the other hand, it has been established that the adrenal cortex and the antidiuretic hormone of the posterior pituitary are intimately involved in such processes. Certain compounds of the amine type, among which are the adrenal medullary hormone, do have a dramatic action on water diuresis; but it is questioned whether these substances are involved in the …

Radiosensitivity Of Mice In Relation To Heightened Metabolic Activity During And Immediately Prior To Exposure To 220 Kv X-Rays, M. Rosalie Henneke

Bachelors’ Theses

The manner in which certain factors influence the susceptibility of protoplasmic systems to ionizing radiations is not as yet well understood. Of prime importance among these factors is metabolic rate; it has been demonstrated that there exists a definite re­lationship between metabolic level and the lethal effects of such radiations. At the outset it must be pointed out that there are two principal problems in this connection; that is to say, radiosensitivity can be studied in relation to metabolic rate prevailing during or subsequent to exposure. One of the most frequently used criterion of radiosusceptability is mortality rate.

Isotomine Collembola From The Sandia Mountains Of New Mexico, Harold Scott

Biology ETDs

This paper records the first study of Collembola ever made in the Sandia Mountains and one of the first ever made in New Mexico even though the state presents excellent opportunities for study of this order. The Sandia Mountains are an ecologist’s paradise and it is probable that two hundred or more species of Collembola occur in this region alone. The entire state of New Mexico, possessing the extremes of elevation and the large geographical extent necessary to produce a great diversity of habitat types, probably contains nearly twice this number.

A Chromatographic Study Of The Lower Fatty Acids Of Swiss Cheese As A Measure Of Quality, Dee R. Morgan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Importance of project:

A sweet hazelnut flavor, a pliant texture, and large, evenly distributed "eyes" characterize high quality Swiss of Emmenthaler cheese. The typical sweet flavor is chiefly due to bacteria which produce propionic acid, acetic acid, and carbon dioxide. The eyes are formed from the gas, mainly carbon dioxide, produced by these and other bacteria.

Krett and Stine (20) have found that the lower fatty acid content of a Swiss cheese generally indicates its quality.

A study of factors which may influence the amount and ratios of the volatile acids should be helpful in determining manufacturing and curing procedures …

A Comparison Of Formulae In The Manufacture Of Ice Milk, Glen Wilford Sargent

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Ice milk is not a new product in the ice cream industry. Rather it is one that has gained only little popularity, except in the preparation of "malts" and "milk shakes"; however, within the last decade the gallonage of ice milk produced has more than doubled.

Ice milk has been relatively unimportant because of the difficulty of obtaining a product with acceptable quality. In recent years progressive ice milk manufacturers and research workers have discovered new ingredients and processing procedure that seem to produce favorable results.

This low-fat product has several merits that justify its recent popularity, such as low …

The Status And Management Of Pheasant Posted Hunting Areas In Utah, William G. Parsons

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since 1900 the ringneck pheasant Phasianus colchicus torquatus Gmelin has assumed major importance in the United states as an upland game bird. This is particularly evident in Utah where, in 1951, 76,000 hunters bagged an estimated one quarter million pheasants (8).

Some Of The Relationships Between Livestock Grazing And Duck Nesting In The Saltgrass Vegetation Type In Utah, Horatio W. Murdy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Little is known of the relationships between livestock grazing and duck nesting. This dearth of information occurs in spite of the fact that an understanding of these relationships is necessary in order to evaluate duck production on range land, and to formulate grazing policies for lands devoted to the production of ducks.

Recognizing the need for information on this subject, the Utah Cooperative Wildlife Research Unit and the Wildlife Management Institute jointly sponsored a study, during 1948-1949, of livestock grazing-duck nesting relationships in the saltgrass vegetation type in northern Utah. The study was financed by the Institute and supervised by …

Viability Of Seed Produced By Annual Weeds And Winter Wheat Treated With Herbicides, J. Wayne Whitworth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Large sums of money are spent annually for herbicides to control weeds in fall sown wheat. Many of these weeds are killed by such treatments while others survive and mature seed. Viability of seeds produced by weeds injured by systemic or growth regulator type herbicides has long been a matter of great interest, much speculation, and very little research. Data on this subject are needed in order to intelligently use chemicals for weed control.

Anther Development In A Male Sterile Line Of Corn, Richard J. Vogl

Bachelors’ Theses

Production of viable pollen through growth and differentiation of the anther appears to depend on the interaction of the tapetum and sporogenous tissue. Very little is known about the nature of this interaction. One way to approach this problem is to study the development of the anther in cases where no viable pollen grains are produced. Highly inbred lines of male sterile corn which are completely pollen sterile have been obtained and are available for study.

The Effects Of Fertilizers On The Yield, Carotene Content And Tocopherol Content Of Ranger Alfalfa Hay In Utah, Charles Wm. Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Alfalfa is generally regarded as one of the world's most valuable cultivated forage crops. Few crops, if any, are equal to it in capacity to produce heavy yields of highly nutritious, palatable feed. A combination of desirable attributes as a forage plant and adaptation to a wide diversity of soil and climatic conditions has led to the use of alfalfa in the world to an extent probably exceeding that of any other single legume or grass. Alfalfa constantly proves itself as a valuable feed for most types of livestock. This is especially true in the states where a large amount …

Effects Of Season, Spacing And Intensity Of Seeding On Emergence And Survival Of Four Wheatgrass Species In Central Utah, Edwin B. Abbott

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rehabilitation of deteriorated and abused range lands is being accomplished with greater success each year by the aid of better methods of seeding which include seedbed preparation, intensities of seeding, implements for planting and improved methods of eliminating competition. Much more information is needed, however, in order to recommend suitable methods and species for seeding various vegetation types and sones with reasonable reliability. Throughout the arid and semi-arid range lands, moisture is the principal factor limiting satisfactory seedling establishment. Special attention should therefore be given to more efficient utilization of the moisture supply. Closely related species or species with similar …