Life Sciences Commons^™

Studies On The Comparative Value Of The Hot Treatment (Krantz Patent) And Common Methods Of Handling Barnyard Manure, Orval E. Winkler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Antidating written human history the dung of animals, chalk, marl, wood ashes and other substances were probably used to increase the productivity of the soil. These practises found their way into the earliest farming activities of the Chinese, Persians, Greeks and Romans. (3)(11) In the Hebrew scriptures mention is made of the "Dung Gate". (10) This was undoubtedly a place given to the marketing of manures. That manure was used as a soil amendment in Asia Minor in Biblical times is not questioned. The famous Roman agricultural writer Cato (234 B.C.) wrote at length on manures and their handling. He …

A Study Of The Oviposition And Nymphal Development Of Paratrioza Cockerelli (Sulc) Upon Various Host Plants, Wylie L. Thomas

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The potato psyllid, Paratrioza cockerelli (Sulc) as stated by E. O. Essig, (1917) is a native of the western states.

Since the great outbreak of psyllid yellows in Utah potato fields in 1927 much interest has been given to this insect. The close relationship between the nymphs of P. cockerelli and the disease, psyllid yellows, is a well known fact, but as yet the causative factor by which this disease is produced still remains unknown.

Because of the severity of the disease to potatoes and the importance of knowing something of the host plants of P. cockerelli, the writer, …

Contributions To The Anatomy And Physiology Of The Heart In The Turtle, David J. Twohig

Bachelors’ Theses

The heart in any animal, and especially in higher animals, is an important organ. It is the purpose of this paper to consider such an organ from the anatomical and physiological basis as it exists in the turtle.

The turtle was chosen as the subject for many reasons. The first one of these reasons was because the heart of the turtle closely.resembles the most complex of hearts in structure and action. The second was because the heart is quite typical of the members of Class Reptilia. The third reason was because the speciments are readily obtainable.

Contributions To The Anatomy Of The Aortic Arches Of The Acanthias Vulgaris, Wendell Corwin

Bachelors’ Theses

The spiny dogfish is a small shark that averages about two feet in length and three pounds in weight. It is called spiny because of the presence of a prominent spine on the boarder of each dorsal fin. The species has a wide distribution in the North Atlantic, occurring plentifully on the American and European shores, as well as in the Mediterranean Sea. The fish swim in enormous schools and are constantly in motion. The dogfish has no economic importance but is universally used for dissection in the zoological laboratory.

The Role Of Membranes And Phase Boundaries In Generating Electric Currents In Living Tissues., Norman E. Epstein

Electronic Theses and Dissertations

No abstract provided.

A Study Of The Sculpture Of The Chorion Of The Eggs Of Eighteen South Dakota Grasshoppers (Acridiidae), Raymond Cecil Bushland

Electronic Theses and Dissertations

The most destructive grasshoppers that occur in South Dakota are those belonging to the genus Melanoplus. Of those, the common and harmful species are Melanoplus bivittatus (Say) and Melanoplus differentialis (Thomas). Other species that are of considerable economic importance, and, at times, fully as important as the two species mentioned, are Melanoplus femur-rubrum (Deg.) and Melanoplus mexicanus (Sauss.). Before attempting to work out a plan for grasshopper control, it is desirable at times to know what species are to be encountered. The control may vary to some extent for the different species. It has been found that Melanoplus differentialis hatches …

A Comparison Of Certain Methods Of Assay Oil Of Chenopodium, Orville Peterson

Electronic Theses and Dissertations

As defined in the United States Pharmacoposis, tenth revision, oil of Chenopodiumis the volatile oil distilled with steam from the fresh, over-ground parts of the flowering and fruiting plant of Chenopodium embrosiesdes war antheimintieum. (Family Chenopodiasene) oil of chenopodium yields not less than 65 per cent of accaridel.

The Effect Of Fertilizer Applications On The Quality And The Quantity Of The Oil In Flaxseed, Clarence O. Stockland

Electronic Theses and Dissertations

A considerable number of economic seeds are characterized by the presence of oil instead of starch as reserved material. The flax plant produces an oil-bearing seed which yields either by pressure or by extraction an oil which is used chiefly in the manufacture of paints and varnishes, and in the manufacture of linoleum, oil cloth, printer's ink, and patent leather. The oil obtained from flexseed is known as linseed oil and is one of a class of fatty oils known as drying oil. When exposed to the air the oil absorbs oxygen, forming a compound known ad linoxyn which constitutes …

Reaction To Price Change By South Dakota Farmers, John Gordon Mcneely

Electronic Theses and Dissertations

South Dakota is one of the newest of the important agricultural states. In 1900, many parts of South Dakota were still in the process of being settled. The increase in the amount of land in crops continued without interruption until the time of the World War. We then find a greater demand for farm products than ever before. Inspired by the double incentive of high prices and helping to win the war, South Dakota and United States agriculture had expanded to unprecedented levels by 1920.

An Analysis Of The Bank Credit Situation In South Dakota, Roy James Smith

Electronic Theses and Dissertations

This study was planned as a preliminary survey of the short time credit problems of South Dakota. Although considerable information had been gathered concerning long time credits, no investigation had been made in the short time credit field; consequently the study of short time credits was regarded merely as an extension of the previous field of study. An investigation in this field was expected to be valuable since the efficient operation of the farming business depends in many instances on ready access to a cheap supply of short time credit.

Effect Of Calcium Chloride, Acid, And Alkali On Irritability And Conductivity Of Nerves Locally Cooled, Dominic Baima

Master's Theses

No abstract provided.

Changes Of Electrical Resistance In Nerve During Block By Cold, Irvin Franklin Hummon Jr.

Master's Theses

No abstract provided.

Reactions Of Synthesis Of Methyl D-Glucuronide, Edward J. Czalgoszerski

Master's Theses

No abstract provided.

Food For Children With Special Reference To Dietaries For Chinese Children, Dzi-Chi Gin

University of the Pacific Theses and Dissertations

The chief functions of food may be said to be three--growth, maintenance and proper functioning. Food consists of those substances which yield energy, build tissue, or regulate body processes. The essential substances of an adequate food supply are carbohydrates, fats, proteins, mineral salts, water, cellulose and vitamins Obviously these requirements vary with each individual child, since height weight, shape, age, sex, and nervous tension must all be considered as determining factors in health, while any diseased condition, sometimes unsuspected, presents additional complications. The first special characters of Chinese food is the preponderance of cereal grain of one kind or another--rice, …

Some Biological Aspects Of Fish Culture In The Middle Rio Grande Conservancy Drains, Landrum B. Shettles

Biology ETDs

The purpose of this investigation is to determine the adaptability of the Middle Rio Grande conservancy drains to fish culture. The Albuquerque Riverside Drain has been selected for this study because it is a typical conservancy drain. The section investigated extends a distance of nine miles from a point one mile above the Barelas bridge at a point due west of Alameda.

An Analysis Of The Habitat Distribution Of The Vertebrate Fauna Of A Stream- Bank Association In Western Kansas, Olive Falls

Master's Theses or Doctor of Nursing Practice

This present paper is chiefly concerned with the distribution of animals. The environmental and faunal conditions of Western Kansas have not been studied, and they are rapidly changing, due to human occupancy of the region. Therefore, a major object of this report is to put on record information in regard to the present vertebrate animal life in Western Kansas. Profound changes in the native conditions have already been recognized; for example, many animals have become extinct, and others are gradually vanishing. It is in the hope of contributing something of the facts of the status of the species in this …

Taxonomix Study Of The Betulaceae And The Fagaceae Of Milwaukee County And Vincinity, Chalres A. Guenther

Bachelors’ Theses

The study of the Betulaceae and the Fagaceae in Milwaukee County and the immediate vicinity, taxonomically and from the standpoint of distribution presents an interesting problem. The family Betulaceae (Birch Family) comprises 11 species and 3 varieties, 8 species of which are arborescent. One genera is sometimes referred to as being arborescent in this vicinity, but since the author does not consider a lower growing shrub arborescent, he has excluded it from the classification of trees but has in the following discussion treated it as a shrub. The family Fagaceae (Beech Family) which comprises 8 species of which one is …

The Native And Cultivated Gymnospersm Of Eastern Wisconsin, Mary Stapleton

Bachelors’ Theses

Since the late years of the nineteenth century, botanists have grouped all seed-bearing plants into two main divisions, those with no seed cases, that is with naked seeds, end those the seeds of which are enclosed in a husk, pod, or other covering. The former are Gymnosperms; the latter Angiosperms.

Study Of The Tissues And Tissue Development In The Leaf And Stem Of Lycium Halifmifolium, L., Charles A. Troxel

Bachelors’ Theses

The Matrimony-vines are shrubs with usually spiny branches, rigid in some species, slender and arching or procumbent in others, with small and rather narrow, usually grayish green leaves, and dull-colored whitish, purplish, or violet flowers and scarlet, rarely yellow or black, berries. Most of the species are tender but Lycium halimlfollum, L. chinense, and also Lycium turcomanicum and L. ruthenlcum are hardy and thrive in the north temperate regions.

A Study Of The Plant Ecology Of Salt Lake And Utah Valleys Before The Mormon Immigration, John Homer Wakefield

Theses and Dissertations

This study is an attempt to bring together such available material , heretofore not collected, into a single compilation pertaining to the plant associations of Utah and Salt Lake Valleys. An endeavor is made to build a picture of the vegetation as it was before the pioneers entered these valleys as compared with what it is today. The material compiled here is the result of searching through all available sources such as government reports of geological explorations, private diaries of explorers and pioneers , contemporary magazines, books and newspapers .

The Effect Of Theelin Upon The Growth And Development Of The Genital Tracts Of The Female White Rat, Robert H. Grogan

Bachelors’ Theses

This paper has been designed to meet the requirements of a bachelor's thesis. The main substance of the thesis is a reiteration of some of the work done by other men in the field of ovarian hormones with some original work on the part of the author. I have endeavored to prove that theelin controls, to some extent at least, the development of the genital tracts of female white rats. Especial care was taken to follow out in detail the methods used by Doisy and his associates in similar experiments so that I would have a criterion by which to …

Bird Studies Of The Bear River Marshes, Ernest W. Parkinson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The establishment of the Bear River Bay Bird Refuge has created for the state of Utah an immense and valuable biological field, a veritable paradise for naturalist and sportsman alike. The naturalist wants a place to study wild life and the sportsman desires game. With the proper control of open seasons on wild fowl the hunting instinct and incentive for the sport should be satisfied for the sportsman. To the naturalist this region will open up bountiful treasures of knowledge that is to be gained only by intense and prolonged scientific study.

Within this new field, and the limited time …

A Dietetic Analysis Of The Nursery School Diets At The Utah State Agricultural College, Eleonora Jennie Tasso

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The establishment of the nursery school at the Utah State Agricultural College opened a means of approach to the infant and child nutrition problem from two angles:

First - as a highly effective agency for the direct improvement of the nutrition of the children under its charge; Second - as an opportunity for research into problems of child nutrition.

A Critique Of Some Of The Metabolic Changes In The Mucosa Of The Alimentary Tract, Anthony Sanfelippo

Bachelors’ Theses

Among the many clinical conditions found in human beings, by both physician and surgeon, metabolic changes in the mucosa or peptic ulcer, as they are commonly known, stand out prominently from a purely scientific point of view, because of the divergent views brought forth during the past hundred yea.rs by even the ablest men. Peptic ulcer is a condition which manifests itself by a disturbance of the alimentary and digestive tracts, locally shown by an erosion of the devitalized cells of the mucous membrane.

A Morphological Study Of Daphniidae, Stanley E. Zawodny

Bachelors’ Theses

Th importance of fresh-water organisms is usually underestimated, especially by the very people who live near bodies of fresh-water and who thus can observe such organisms throughout the year. It is really easier to study minute life forms than it is to study larger organisms, for the former can be examined under all kinds of conditions as experiments are performed upon them. The purpose of this thesis is to give a short survey of the chief type among the fresh-water, Crustaceans, with special reference to morphology.

Heredity In Twinning, Dolores M. Kauffung

Bachelors’ Theses

Identical twins have been tn basis for a large amount of the evidence produced by scientists in upholding the contention that heredity is stronger and more important than environment.

It has been the purpose of this paper and the intention oi' the author to develop this theory and to attempt to discover how far heredity really affects the individual and. to what extent it may be influenced by environment.

Parasitology: With Special Reference To The Frog, Leo M. Boxer

Bachelors’ Theses

Prior to the middle of the sixteenth century the knowledge of parasites, their habits, life-histories and forms as limited to a few external parasites and a few parasitic worms. Previous to the discovery of, and knowledge gained by, the study of microscopic parasites, and the effects produced by them, nearly all diseases were thought of as some sort of punishment for sins committed.

An Introductory Study Of Correlations Existing Between The Weight Of Organs And The Length, Width, And Thickness In Pig Fetuses Of The Same Litter, Michael T. Crowley

Bachelors’ Theses

No studies seem to have been performed on pig fetuses, of the same litter, to determine correlations existing between the weight of organs and other types of measurements of the same organs.

Pasteurized Versus Raw Milk In Brick Cheese-Making, Z. Doyle Roundy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The prime object of the work undertaken in the present study has been done with the view of determining whether or not the quality and yield of brick cheese may be improved by pasteurizing the milk from which the cheese is made. An effort should be made to put brick cheese-making on a more scientific basis and at the same time produce cheese of better and more uniform quality. Since milk, containing large numbers of undesirable microorganisms thus causing objectionable flavors and odors in dairy products, is frequently delivered to cheese factories to be processed, pasteurization seems to be one …

Inheritance Of Resistance To Loose Smut (U. Tritici) In Certain Wheat Crosses, Bion Tolman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During recent years the principles of Mendelism have been used extensively in the production of the new types of plants possessing resistance to various diseases. Results of this mode of attacking the disease problem have been very favorable. Old varieties are gradually giving way to newer types equal to or exceeding in quality and productivity as well as possessing resistance to one or more diseases.

Loose smut (U. tritici) in wheat, while not as serious a problem in Utah as the covered smut (T. tritici), according to Tapke (14) has caused an average annual loss of between 50,000 and 100,000 …