Life Sciences Commons^™

The Latex System In The Root Of Taraxacum Officinale, Eleanor Kelton Evenson

Electronic Theses and Dissertations

In 1930 Mr. Emil Madsen of this laboratory began some experimental work upon the roots of dandelions, for the purpose of determining the means by which a dandelion root, which has been cut off below the surface of the ground, regenerates new shoots. He found that such roots form adventitious buds in exposed pericycle and secondary phloem. Several such buds may be formed in a single root. They grow and appear above the ground as leafy shoot.

Autobiography Of Proteins In Nutrients, Marguerite Jones

Electronic Theses and Dissertations

This thesis, submitted to Xavier University in 1933, surveys the chemical classification of proteins and their role in human nutrition, with the stated aim of preparing home economics students to understand protein's function in the diet. Jones organizes proteins into three major classes: simple proteins, including albumins, globulins, glutelins, protamins, and histones; conjugated proteins, including nucleo-proteins, glyco-proteins, phospho-proteins, and hemoglobins; and derived proteins, including albumoses, peptones, and peptids, describing the chemical composition, solubility properties, and sources of each.

The thesis then examines amino acids as the end products of protein digestion, identifying those essential for growth and maintenance, including tryptophane, …

Trichomonas Fulicae Sp. Nov. From Fulica Americana, Elizabeth G. Lash

University of the Pacific Theses and Dissertations

Numerous trichomonad flagelletes from the intestines or various birds have been described; but as fas as the writer has been able to discover, none from the intestine of the coot, Fulica americana. Martin and Robertson (1911) described Trichomones eberthi and T. gallinerum from the caecum of fowls; Kotlan (1923) described Tetratrichomonas avatis from the caecum of ducks; Tyzzer (1930) described flagellates from the ruffed grouse.

However, the species described by the above authors are quite different from Trichomonas to be described in this paper. This organism is definitely a member of the genus Trichomonas since it possesses the distinguishing characteristics …

The Spinal Origin Of Fibres Causing Vasodilation In The Cat's Submaxillary Gland, Herbert M. Stanton

Master's Theses

No abstract provided.

The Effect Of Insulin, Dextrose, And Cyanide On The Circular And The Longitudinal Muscles Of The Rabbit's Intestine, Gustav A. Hemwall

Master's Theses

No abstract provided.

Origin Of The Limb Musculature In The Mouse., R Wendell Coffelt

Electronic Theses & Dissertations

One of the most important and much disputed questions in the field of developmental anatomy is the role the myotomes play in the development of the limb musculature. At present there are two explanations advanced concerning the development of the limb-musculature in mammals. The first is that limb-buds arise as local thickening of the somatopleure, which becomes filled with a homogeneous syncytial mesenchymal tissue, that later becomes innervated with muscle-buds from the myotomes and with blood vessels, and nerves from the trunk of th embryo. The second method explained as to the origin of limb muscles is that they are …

The Development Of The Floral Organs Of Glycyrrhiza Lepidota, Richard L. Matteson

Electronic Theses and Dissertations

This is the first of a proposed series of papers, coming from the Botanical Laboratory of South Dakota State College, on the developmental anatomy of the prairie legumes. The recorded investigations of the legumes deal mostly with the cultivated species, and the greater part of this work considers the taxonomy and cytology of flowers. These papers proposed above deal with the floral development and the floral vascular anatomy of this family.

Sporogenesis In Riccia Natans L., Mary Fortunata

Bachelors’ Theses

Until comparatively recent years little, comprehensive Cytological work had been done on the lower forms of plant life including the Liverworts. Cavers (1903) stated that Micheli in 1729 named a species "Hepaticae fontana" because of the supposed resemblance between the branched thallus and the lobes of the liver, and although this species was later named "Fegatella conica", the name "Hepaticae" has, since then, been applied to the whole group of Liverworts. Between 1850 and 1862 Hofmeister demonstrated "Alternation of Generations" in this group, and it was this characteristic that distin­guished them permanently …

The Reaction Of Salts On The Regional Muscular Activity Of The Earthworm, Ernest D. Habeger

Electronic Theses & Dissertations

Though a great amount of work has been done concerning the effects of salts upon the organic constituents of all muscular tissues of the earthworm, very little has actually been accomplished showing the effect of salts on the rhythmic contractions of that animal. However, the normal peristaltic activity of the muscles of the earthworm has been shown to represent a characteristic behavior from its anterior to its posterior extremity.

It is the purpose of this investigation to demonstrate the effects of various concentrations of salts on this normal rhythmic activity of the various regions of the earthworm.

A Study Of Some Species Of Pediastrum And Scenedesmus, Irene Cull

Bachelors’ Theses

Although regarded by the untrained observer as slime, filth and scum, algae are fascinating to the botanist who has become interested in them. Algae are found everywhere; they are our commonest water plants. Among the green algae we have some of the most beautiful and fascinating forms in the plant kingdom and undoubtedly Pediastrum and Scenedesmus, the two genera studied, are among the most beautiful of all.

Values To Be Derived From A Study Of Biology, Florence J. Kane

Bachelors’ Theses

My problem was to discover what scientists, educators, and people interested in the teaching of biology considered the most important values to be derived from a, study of this subject.

The Genesis Of Tetanus And Characteristic Features Of A Single Muscular Contraction, Clarence S. Livingood

Biology Honors Papers

This 25 page thesis discusses experimental work on muscle stimulation to produce complete tetanus.

The Pituitary, Thyroid, And Adrenal Glands Of The Opossum, Max F. Drozewski

Bachelors’ Theses

In recent years a great deal has been written on the endocrine glands. However most of the articles deal with the physiological function of the various ductless glands only. Very little of this literature deals with the anatomical structure of the organs themselves. In this thesis we shall discuss the anatomical structure of the endocrine glands namely, the Pituitary(hypophysis), Thyroid and the Adrenal of a marsupial. The work has been done on the opossum of the virginia species, Didelphis virginiana. Only two specimens were available for dissection.

The Spleen Histology And Differences In Functions, John Shakula

Bachelors’ Theses

In delving into the literature concerning the Spleen one is greatly surprised to find so much diversity of opinion concerning its origin, histology and functions.

The Endocrine Glands And Their Secretions, Eldred M. Moehrke

Bachelors’ Theses

In the following work the endocrine system was considered in general with special emphasis on the thyroid and para-thyroid glands. In some manner,which we do not well understand,the thyroid and the para-thyroid glands affect the other ductless glands and it is this relationship that is stressed.

General Morphology And Physiology Of The Urogenital System Of The Opossum, Robert Schuster

Bachelors’ Theses

From the very first, I wish the state that the title, "General Morphology and Physiology of the Urogenital System of the Opossum," is not entirely descriptive of the text which is to follow. However it is as nearly descriptive as I could hope to make it.

It seems that during the history of biological research the workers have done comparatively little work on the Opossum. This neglect was probably due to its inaccessibility, since it is found only in Australia and in the semitropic regions of North America. In the nineteenth century the eminent authority on anatomy, Sir Richard Owen, …

A Morphological And Systematical Study Of The Genus Brachinus Of The United States, Almon L.D. Brown

Theses and Dissertations

The genus Brachinus belongs to the well-known family Carabidae, commonly known as "Ground Beetles". About 15,000 species of Carabidae have been described, of which over 100 genera and 1,200 species occur in the United States. (Dodd Mead 1928).

Fertilizer Studies As Conducted On The Carbon County Experimental Farm With Special Reference To Treble-Superphosphate, Delos Zobell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 1927 an experimental farm was established in Carbon County, Utah. The farm is on a new irrigation tract south of the Price River and about four miles south of Price. The agricultural problems of the Carbon County Experimental Farm and the locality which it serves are distinctly different from those of most of the farming sections in Utah. The soil of this region is of a sandy, silty nature apparently with deflocculated colloids which make it somewhat difficult to manage. There is a low percentage of organic matter in this soil, and because of this and its impervious condition …

Alfalfa Seed Production In Millard County, Utah As Related To Soil Type, George Whornham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Alfalfa has a wide range of adaptability as a forage plant, but the areas in which it will produce seed successfully are extremely limited. These sections are confined almost exclusively to the arid or semi-arid regions of the world. In all other areas it is primarily a question of seasonal fitness. The extreme localization may be further emphasized by the fact that within the highest producing counties there are appreciable areas of land not suitable for seed production.

Fertilizer Studies As Conducted On Muck Soil In Sanpete County, Utah, Lemoyne Wilson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The reclamation of muck soil is a new development in the state of Utah. Knowledge concerning the various properties and requirements of the newly-drained area in Sanpete County, Utah, is extremely limited. A need for fundamental information concerning this type of soil was the basis for the establishment of an experimental farm in this region. The fact that most organic soils respond to mineral fertilizers soon after they have been reclaimed was an important reason for starting fertilizer work on this soil as soon as it was possible to do so. This thesis reports some of the fertilizer work being …

The Morphology Of The Seminal Vesicles, Accessory Glands, And The Ejaculatory Canal Of Melanoplus Differentialis (Thomas) And An External Morphological And A Histological Study Of The Seminal Vesicles, Accessory Glands, And Ejaculatory Canal Of This Grasshopper, Wilbur T. Reierson

Electronic Theses and Dissertations

The purpose of this thesis is to record the results of an investigation, by the writer, upon the reproductive system of Melanoplus differentialis (Thomas) with special emphasis placed upon the external morphology and the histological study of the seminal vesicles, accessory glands, and the ejaculatory duct; and also to record conclusions as to the probable function of these organs.

Some Effects Of A Constant Temperature And Different Relative Humidities Upon Egg Laying Of Melanoplus Bivittatus Scudder., Millard Jewell Hatten

Electronic Theses and Dissertations

Of the various species of grasshoppers occurring in rather extensive numbers year after year in the northwestern plains states, Melanoplus bivittatus is one of the most prevalent and destructive. It was thought that a study of the influence of different temperatures and relative humidities upon the reproductive potential of this species might reveal some information and that this information might be of some value in an attempt to forecast the abundance of this grasshopper in years following others in which the factors of temperature and relative humidity were known.

Farm Mortgage Experience Of Life Insurance Companies Lending In South Dakota, Harry Allan Steele

Electronic Theses and Dissertations

Life insurance funds play an important part in supplying farm mortgage credit. This source of credit has increased rapidly during the last twenty years and is now one of the principal sources of farm mortgage loans in the United States. Because of the nature of the institution of life insurance, its investments should be conservative. It is with this view in mind that the state insurance laws are designed to regulate the investments of the life insurance companies. Investments of the well established life insurance companies have generally been made on a conservative basis.

Anatomical Study Of Water Shoots And Ordinary Twigs, Dorothea I. Bingham

Electronic Theses and Dissertations

Water shoots or long shoots are those which appear low on the trunks of trees, or about stumps of trees recently cut down. The ordinary twigs are those found at the ends of branches. Interest in the cooperative study of water shoots and ordinary shoots on trees was aroused by the very marked differences, even in a single years growth, in length and the diameter of two types. The former is greater in diameter , much longer, and with more nodes, longer internodes and longer leaves than the twigs which grew ordinarily at the ends of branches. The object of …

The Effect Of Drugs On The Longitudinal And Circular Muscle Of The Rabbit's Intestine: A New Method Of Study, Howard Vincent Valentine

Master's Theses

No abstract provided.

Further Studies Of The Effect Of Saponin On Intestinal Absorption, Nello Michael Felicelli

Master's Theses

No abstract provided.

The Influence Of Chemicals On The Growth Of Bacteria, Alice J. Burke

Master's Theses

No abstract provided.

The Effect Of Sodium Chloride Upon The Fission Rate Within A Single Clone Of Paramecium Caudatum And The Heritability Of That Effect., Mary C. Adolph

Electronic Theses and Dissertations

No abstract provided.

The Distribution And Economic Significance Of The Genus Polygonum In Sacramento County Of California, Helen Keech Mccarthy

University of the Pacific Theses and Dissertations

The genus Polygonum belongs to the family of plants, the Polygonaceae, which includes about forty genera and seven hundred and fifty species. About two hundred end seventy-five of these belong within Polygonum. Scientists have also found distinctly recognizable fossil Polygonums which date from prehistoric ages. Dr. F. H. Knowlton¹ of the U. S. National Museum has listed twelve species which have been found in fossil form. While studying collection of Colorado fossil plants in the Geological Tunes et Columbia College, Small discovered a remarkably distinct Polygonum belonging to the subgenus Persicaria.

A Study Of Poverty And Dependency In Phelps County For 1931, Arthur Royal Powell

Masters Theses

"The Ozark Region of Missouri is rapidly undergoing a definite social and economic change. thru markedly improved methods of communication and transportation the eighteenth century culture of this region is being metamorphosed into a twentieth century culture. Where the Ozarker of a generation ago was a strongly individualistic frontiersman in his outlook on life, he is now in the process of becoming a citizen of a larger and more complex society. The telephone, the radio, and the concrete highway, together with the cheap automobile, have made the customs and many of the folkways and mores of the Ozark people obsolete, …