Life Sciences Commons^™

Ascorbic Acid And Glucose: Their Relation To Rheumatic Fever In Utah, And Their Relation To Incidence Of Dental Caries In Idaho, Patricia Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Diseases which in the sixteenth century were found to be related to a deficiency of some substance in the natural foods consumed in the diet were later known as deficiency diseases. As early as 1881, Lunin found that rats could not live on a purified diet of carbohydrate, fat, protein and minerals, but could exist on a diet supplemented with certain natural foods. These findings were found to be in agreement with records of early descriptions of deficiency diseases. Scurvy was recognized very early in voyages made across oceans where ships had no means of being re-provisioned. Progress was very …

Factors Determining Fruit Set And Seed Development In Artificially Pollinated Tomatoes, Charles Howard Henry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Commercial plantings of tomato hybrids will give increases in earliness and yield because of hybrid vigor, but seed costs become a limiting factor. The necessity of hand-pollination makes the production of first generation hybrid tomato seed a costly enterprise. Failures of fruit set and seed development in artificially pollinated tomatoes are two contributing causes for the increased cost of F₁ seed.

The purpose of this investigation is to study some basic factors influencing these failures and to find ways of increasing fruit set and number of seeds per fruit.

The scope in addition to the field studies described includes …

The Effect Of Feeding Sucrose To Beef And Swine On The Percentage Of Carbohydrate, Ph, Color, Texture, And Flavor Of Muscle And Liver, Margaret B. Merkley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Carbohydrates have long been a part of animal feeding rations. Grains are included in all animal feeding formulas. The by-products of sugar beets have been used for many years in livestock feeding (Kutish 1950b). The use of molasses in commercial feed mixes in 1899 made possible its extended use in animal feeding practices (Hall 1950).

Protein feeds for cattle are relatively high in price and not available in adequate supply. With these facts in mind Culbertson of Iowa State College set up experiments in 1950 to find out whether part or all of the protein supplement could be replaced with …

The Uptake Of Iron By Bean Plants As Influenced By Age, And Calcium And Bicarbonate Ions In Solution Cultures, Michael Marcour

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Chlorosis of the foliage of higher plants has constituted a severe fertility problem in many areas of the world. It has been reported in no less than 30 countries. It has manifested itself in the western states and has usually been associated with a high CaCO₃ content in the soil.

This chlorosis does not always result from lack or unavailability of one of the essential elements, but can result from several conditions around the plant roots or psychological processes taking place within the plant. Both the absence of iron in the Boil and conditions which provoke its unavailability to …

The Development Of Two Apparatuses And Techniques For The Measurement Of The Basil Respiration Rate Of A Bull Snake At Various Temperatures, Rowand R. Chaffee

Biology ETDs

The literature is extensive with respect to mammalism physiology, but extremely sparse concerning the reptilian physiology. According to Cook (1949) very little comprehensive work concerning the fundamental aspects of reptilian physiology has been done since Benedict's work in 1932.

The Influence Of Electrolytes On Certain Characteristics Of Corn Starch, Arthur H. Hupp

Paper Engineering Senior Theses

The survey of literature shows that very little work has been done showing the effect of small amounts of electrolytes on the properties of native corn starch. The literature seems to be in agreement in that electrolytes do effect gelatinization when added in small amounts before cooking. Just what role the anion or cation plays seems to be controversial.

Varying amounts of electrolytes with different cations but the same anion were added to different concentrations of native corn starch before cooking. Viscosities were then taken after cooking under a standard cooking procedure. The results seem to indicate that the mono …

The Influence Of Urea & Melamine Formaldehyde Resins Upon Absorbency, Softness, & Dry Strength Characteristics Of Paper, H. B. Herman

Paper Engineering Senior Theses

The literature is reviewed on urea and melamine formaldehyde resins and their possible effects upon softness, absorbency, and physical characteristics. The standard tests of these sheet properties are also defined and reviewed. Experimental work is described in which resin treated sheets were prepared and evaluated. The resultant data is evaluated from the standpoint of property variations and is graphically illustrated. Conclusions are drawn as to the feasibility of resin treatment for soft absorbent sheets.

The Retention Of Wet Strength Resins As Determined By The Kjeldahl Method, Walter J. Redmond

Paper Engineering Senior Theses

True wet strength is not a gauge of water proofness of paper, but is a measure of the residual strength of the paper gauged by the mullen, tear, burst, and fold, after the paper has been completely soaked in water and the resistance to water penetration has been completely broken (1).

To increase the wet-strength of paper, a number of different resins may be applied, and these resins may be broadly classified as anionic or cationic in nature. Of these resins, three particular resins will be discussed, cationic melamine-formaldehyde, anionic urea-formaldehyde, and cationic urea-formaldehyde.

The Influence Of Beating Of Pulp On Fiber Length And Fiber Length Distribution, Rudolf Schmut

Paper Engineering Senior Theses

1. Introduction

Recent studies and researchers assume that certain relationships exist between different properties of pulp - such as between bulk, tearing resistance, bursting strength, tensile strength, freeness, and fiber length index. It has been found furthermore that such relations are different for different types of pulp and that some may even vary from pulp to pulp of the same type.

The Improvement In Type Of South Dakota Dairy Cattle Through Artificial Breeding, Kenneth I. Gross

Electronic Theses and Dissertations

Body conformation is associated with function among all classes of livestock. Dairy cattle type deals with characteristics indicating ability to produce milk and butterfat economically along with breed character and other values of an aesthetic nature. In order to have economical milk and butterfat production, the dairy cow should possess that type of body conformation which is able to withstand the rigors of disease, reproduction and year after year milk production. A large percentage of dairy cattle sold in South Dakota and surrounding territory, whether for breeding purpose or commercial production, are evaluated primarily on the basis of their type. …

Some Mechanical And Horomonal Methods Of Dilating The Bovine Cervix, Edmund F. Graham

Electronic Theses and Dissertations

The selection for certain inherited characteristics war practiced approximately 2000 years before the Christian Era. Jacob (Genesis 30:28-43) was given all the speckled cattle in his master’s herd for being herdsman. In a few years, by selecting for the spotting factor, only speckled cattle remained in the herd. Selection was the first tool for segregating definite characteristics. As a means of more rapid improvement artificial insemination was practiced by an Arabian chieftain as early as 1322 A. D. (35). Since 1322 these crude methods of transferring semen have been perfected until approximately four million cows were inseminated in the United …

The Chemical Control Of Annual Weeds In Cotton., Linton Eslic Cowart

LSU Historical Dissertations and Theses

No abstract provided.

Studies On The Influence Of Various Carriers And Adjuvants In Relation To Chlorinated Phenoxy Herbicides., Milton Edwin Gertsch

LSU Historical Dissertations and Theses

No abstract provided.

Biotin And Oleic Acid In The Nutrition And Metabolism Of Certain Microorganisms., Emilie Anne Andrews

LSU Historical Dissertations and Theses

No abstract provided.

Effectiveness Of Various Chemicals In Counteracting 2,4-D Toxicity To Corn Seedlings., Robert Baker Carroll

LSU Historical Dissertations and Theses

No abstract provided.

Physiological Studies Of Sex In Glomerella., Joe Winfield Mcgahen

LSU Historical Dissertations and Theses

No abstract provided.

Studies On The Causes And Control Of Seedpiece And Stubble Deterioration Of Sugarcane., Mohammed Abdul Wahid

LSU Historical Dissertations and Theses

No abstract provided.

Studies In The Control Of Johnson Grass In Certain Areas Of Louisiana., Edward Scott Hagood

LSU Historical Dissertations and Theses

No abstract provided.

Inheritance Studies In The Onion, Allium Cepa L., Warid Abdel Bar Warid

LSU Historical Dissertations and Theses

No abstract provided.

Biochemical Studies On Anolis Carolinensis., Herbert Clay Dessauer

LSU Historical Dissertations and Theses

No abstract provided.

Inheritance Of Resistance In Sugarcane To Mosaic And Red Rot Diseases., Youssef Elsedik Azab

LSU Historical Dissertations and Theses

No abstract provided.

Life Cycle Studies On Stephanostomum Pacificum, A New Species Of Trematode, From The Pacific Marine Station Area, James Frank Hughes

University of the Pacific Theses and Dissertations

This report summarizes the results of a study on the life cycle of a member of the trematode family Acanthooolpidae, genus Stephanostomum Looss, 1899, which was carried on during the summers of 1948, 1949, 1951, and the winter of 1948-49 at the Marine Station of the College or the Pacific at Dillon Beach, California. Only one previous experimental work has been done on the life cycle of any member of this family. Martin (1939) reported the life cycle of Stephanostomum tenue (Linton) which he had obtained at Woods Hole, Massachusetts. Modifications of his technical procedures have been used in this …

A Statistical Study Of The Growth Pattern Of The Cornish Fowl., John Cyrus Gilbreath

LSU Historical Dissertations and Theses

No abstract provided.

Tannin Content Of Certain California Oaks, Arthur Carton

University of the Pacific Theses and Dissertations

The purpose of this paper is to investigate three California oaks as possible sources of tannin. Even though the study of the three varieties of tree may not be representative samples, the procedures developed may prove to be valuable in a more extensive research by other workers.

The Influence Of Electrolytes On Certain Characteristics Of Pulp, Wayne Eugene Kendrick

Paper Engineering Senior Theses

This thesis is an endeavor to bring out the reasons for strength variations due to the presence of electrolytes in the process water, occurring either naturally or in the form of additives. The subject is subdivided into effects caused by cations and effects caused by anions plus special cases.

Material was obtained from the science library of Western Michigan College of Education, the Kalamazoo Public Library and microfilmed articles from the New York Public Library.

Microscopy Of Newly Developed Paper Making Fibers, Richard E. Hathaway

Paper Engineering Senior Theses

The more important of the newly developed fiberous paper making materials are bleached groundwood, West coast kraft, hardwood kraft, semichemical pulp and cotton linters. The weight factors of these fiberous materials have been determined by several different investigators, but their identification in a paper furnish is very difficult. The weight factors of cotton linters varies with the freeness of the sample, which can be determined by dying the fibers with a mixture of a direct orange and a direct blue bye. Differentiation can be made between bleached and unbleached groundwood with the Loften-Merritt stain. Staining methods cannot be used to …

The Evaluation Of Coated Papers Containing Varying Amounts Of Thermoplastic Adhesives, Roderick A. Perkins

Paper Engineering Senior Theses

Information is given on the effects of various concentration of styrene-butadiene latex and oxidized corn starch as binders in coated papers. Also data is given on the effects of increased amounts of styrene-butadiene latex in starch clay systems with respect to viscosity.

A Statistical Analysis Of Strength Characteristics Of Handsheets, Edward J. Horvath

Paper Engineering Senior Theses

A literature survey was made in order to provide an outline of fundamental statistical definitions, formulas and methods which are used by the paper technician. These methods, if properly applied, would furnish valuable information as to the accuracy of test values, significance of differences and merits of various operations.

A demonstration is made of the application of statistical methods to test data obtained from samples of unbleached kraft pulp in the form of wet laps, air-dry pulp and soaked pulp. The analysis was devoted to the study of strength variations, uniformity and duplicability of handsheets produced from the three samples.

A Study Of The Factors Affecting The Living Standards Of Negro Farm Families In Shelby County,Tennessee, Odie Lee Armour

Tennessee State University Alumni Theses and Dissertations

No abstract provided.

Effects Of Aureomycin And Vitamin B 12 On The Growth Of Pigs, Beecher C. Sparkman

Tennessee State University Alumni Theses and Dissertations

No abstract provided.