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Resistance To Staphylococcus Aureus In White Rats, Robina B. Langill

Bachelors’ Theses

An investigation of bibliographies shows that staphylococcus aureus in its pathogenic potentialities has been extensively investigated from varied points of view and with frequently conflicting results.

Staphylococcus aureus is most frequently associated with furuncles, wound infection, and minor skin abcesses. Occasionally, however, due to extreme lowered resistance or other conditions not fully understood, staphylococcus causes a septicaemia which is attended by an 80% mortality rate. Post-mortem examinations of the victims of such septicaemia show an extensive invasion of all organs of the body by the bacteria but more particularly a hyperplasia of the lymph nodes, the spleen and thymus, indicating …

Reflex Action In The Earthworm, As A Typical Example Of The Annelids, Morris L. Yoder Jr.

Biology Honors Papers

This 18 page thesis discusses the anatomy of the earthworm and importance of reflex actions, including responses to various stimuli and the role of the nerve cord.

A Survey Of Human Intestinal Protozoa Of Logan City And Vicinity, Robert B. Harrison

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Parasitic protozoa of the intestinal tract of man were first observed by Anthony van Leeuwenhoek (1632-1723), a Dutch microscopist. In the year 1681, while observing his own excrement, Leeuwenhoek discovered and described certain forms of life which he called "animalcules" and which were verified later by workers in protozoology as Giardia lamblia, a protozoan parasite of the intestinal tract. During the period preceding the later part of the 19th century many observations of the parasitic intestinal protozoa of men and lower animals were made and many species were classified. It wasn't, however, until the year 1875 that a protozoan …

The Effect Of Environmental Factors Upon The Growth Rates Of Minnesota Fishes, Samuel Eddy, Kenneth D. Carlander

Journal of the Minnesota Academy of Science

No abstract provided.

Minnesota Lake Surveys And Fish Management, Samuel Eddy

Journal of the Minnesota Academy of Science

No abstract provided.

Regional Plankton Studies In Minnesota, Charles B. Reif

Journal of the Minnesota Academy of Science

No abstract provided.

Deer Inventory Studies In Minnesota, Gordon Fredine

Journal of the Minnesota Academy of Science

No abstract provided.

Further Studies On Prosthogonimus Macrorchis, Oviduct Fluke Of Poultry, With Special Reference To The Effect On Egg Production In The Ring-Necked Pheasant, Ralph W. Macy

Journal of the Minnesota Academy of Science

No abstract provided.

The Morphology And Histology Of The Virginia Oyster, Ostrea Virginica, Lister, Lewis Charles Goldstein

Master's Theses

The oyster has been known and used commercially since before the Roman and Greek civilizations, and reports of investigations pertaining to it can be found dating back almost to that period. Because of the commercial value of the oyster, most of the study of' the animal has dealt with its economic importance. Definite information concern­ ing the morphology and microscopic . structure of this Mollusc, therefore, is scarce. To be sure, there is an abundance of miscellaneous literature, but no systematic microscopic study has been reported. T. C . Nelson (1938) states, "A critical survey of the abundant and scattered …

Kymographic Recordings Of Muscle And Nerve Tissue From The Rana Pipiens, Guilbert K. Jones

Bachelors’ Theses

This Thesis is the result of several months of work done in the Physiology Laboratory in the Marquette University School of Medicine. The experiments performed will enable one to become familiar with the general principles involved in the recording of reactions of muscle and nerve tissue by Kymographic methods. Especial attention is directed to the results of these experiments.

The Influence Of Nutrition On Sporangial Formation In Araiospora Streptandra., Richard Curtis Webster

Electronic Theses and Dissertations

No abstract provided.

Notes On The Life History And Ecology Of Gambusia Patruelis, Robert B. Troxel

Biology ETDs

It is the purpose of this thesis to present information on the life of Gambusia patruelis. The study is the combination of data collected by a number of writers on this subject, as well as observations taken of this species from the Rio Grande and conservancy ditches surrounding Albuquerque.

A Study Of The Variations In The Growth Of Blue Grama Grass From Seed Produced In Various Sections Of The Great Plains Region, Andrew Riegel

Master's Theses or Doctor of Nursing Practice

During the past 7 years the Great Plains Region, with its "dust bowl", has been the scene of unparalleled activity in the fields of range management and erosion control. The people of this short grass area are extremely conscious of the need for a sound, practical program of conservation that will revegetate the wasted pasture and cultivated land, which will aid materially in preserving the eroding soil. Many problems have arisen as the program of conserving the soil and the vegetation has progressed.

Origin And Development Of Tissues In The Root Of Daucus Carota, L., M. Gerald Vodde

Bachelors’ Theses

When botanists of the seventeenth century began their anatomical investigations of plants, their attention was quite naturally centered on the parts of the plant which they most readily observed growing above the ground. The Englishman, Robert Hooke (1661), revolutionized the botanical sciences when he announced his discovery of the fact that plant tissues are composed of cavities which he called cells. Many workers enthusiastically took up the study of plant tissues and the individual cells of which these tissues are composed. Progress was rather slow, and it was not until approximately two hundred years later that the cell theory was …

The Pro-Embryo And The Embryo Of Chara, Mary William Saller

Bachelors’ Theses

From earliest times the Charales have drawn the attention of Botanists. Their structure and affinities have led to the most interesting and comprehensive research projects. However, the earliest results, in the light of present day research, differ particularly in one important respect; namely, the origin of the embryo.

A History Of The Changes In Population Of Certain Mammals In Western Kansas, Floyd L. Carter

Master's Theses or Doctor of Nursing Practice

This particular study has been restricted to certain mammals in western Kansas, including some on which there is little information, and others which observers would be most likely to notice in everyday life. For several years the writer has been vitally interested in the animal life in Kansas. Therefore, when the need for a study of western Kansas mammals was presented to him in the summer of 1936, the problem of this study was selected. It is hoped that this report will suggest to ecologists, historians, and others, further studies, including reasons for the changes here-in shown. What have been …

The Skull Of Squalus Acanthias, Allan J. Blake

Bachelors’ Theses

The spiny dogfishes (Squalus) inhabit the North and South temperate zones; they have no anal fins; the points of the small teeth are deflected laterally so ·chat the inner margin forms a cutting edge. Squalus Acanthius is very abundant in British waters and off the Atlantic coast of North America. This group has five gill openings and two dorsal fins each of which is typically preceded by a spine. It reaches a length of four feet, and is a great nuisance to fisherman, eating fish and getting caught in lines or in nets. They are all viviparous. Many …

Notes On The Origin And Development Of Zea Mays, Martin William Fleck

Biology ETDs

A combination of many and varied circumstances gives an unusual interest to the origin and natural relationships of Zea mays, although investigation of this sort does not always have an immediate utilitarian objective. But, this type of investigation must of necessity project itself into the remote, and sometimes obscure, past where attention becomes focused on many moot questions. Such intriguing problems as the relative antiquity of agriculture in the Old World, the length of time requisite for the development of maize as a human food stuff, and new ideas concerning techniques of aboriginal agriculture may perhaps be solved by information …

Plants And Animals Used As Sources Of Dye, Paint, And Skin Dressing In The Southwest, Mary Dennis

Biology ETDs

The area comprising the Southwest is somewhat disputed by different authors, but some idea of its extent and general features as well as some conception of the ethnology in relation to the tribes within the area is needed for an understanding of the scope of this investigation.

A Comparative Study Of The Skull And Long Bones Of The More Common Small Mammals Of Bernalillo County, New Mexico, Robert Theodore Fincke

Biology ETDs

The identification of animals or parts of animals without the aid of external characteristics is confusing problem in many fields of zoology. This is especially true in some studies as life histories and the food habits of predators. A problem of this type is even more confusing in New Mexico because relatively little work has been completed on the taxonomy and the distribution of the native fauna.

The Food Of The Frog, Paul Schmitt

Bachelors’ Theses

All living organisms whether they be the smallest single cells or the largest mammals demand nourishment for their multifarious physiological processes. Popular and pseudoscientific thinkers and writers speak of nutrition in terms of food consumed, while true scientific investigators consider nutrition in relation to the actual assimilation of the components of food called proteins, fats, and carbohydrates.

The Histology Of The Grog's Tongue (Rana Pipiens), Michael William Mille

Bachelors’ Theses

The tongue is generally represented in all vertebrates although it varies widely in the extent to which it is developed. Among the fish it occurs in its most primitive condition. It is called a primary tongue and is merely a fleashy fold of dense connective tissue developed from the floor of the mouth between the hyoid and mandibular arches, the hyoid frequently extending into it and supporting it. It is incapable of motion except as moved by the supporting skeleton for it lacks intrinsic muscles. It is sensory, having both tactile and gustatory functions. It is often papillose, and in …

The Mammalian Erythrocyte, H.J. Werner

Bachelors’ Theses

An investigation of bibliographies shows that the red corpuscles of the blood have been studied very extensively, in fact, wore so than any cell in the mammalian body. The study has progressed vigorously and from varied points of view.

The Relationship Of Auximones And Phototropic Responses To Plant Growth, H. Eugene Hile Jr.

Biology Honors Papers

This 22 page thesis examines the nature and function of auximones and phototropic responses in plant growth.

Staining Techniques In The Study Of The Blood, Donald E. Winnik

Bachelors’ Theses

Since the invention of the microscope, the study of the blood and its constituents has been a major interests of histologists and hematologists. The vast amount of material written about the subject could not have been accomplished without the development and use of staining techniques which made possible a more precise observation of the nature of the blood. At the present time there are many procedures and stains which vary greatly in their application and use. It is the purpose of this thesis to review these many methods and catalogue them according to their application in the blood techniques.

A Cytological Study Of The Central Body In Oscillatoria Formosa And Oscillatoria Limosa, Ruth Joanna Dornfeld

Bachelors’ Theses

No abstract provided.

A Peripheral Vascular System As Seen By Means Of A Clark Window In The Ear Of The Rabbit, T. H. Seldon, R. H. Barrett, H. E. Essex

Journal of the Minnesota Academy of Science

No abstract provided.

A Human Hereditary Trait Appearing In Offspring From A Cousin-Marriage, C. P. Oliver

Journal of the Minnesota Academy of Science

No abstract provided.

A Key To Snakes Of Minnesota, Milton D. Thompson

Journal of the Minnesota Academy of Science

No abstract provided.

Growth Substances And Nutrition Of Protozoa, Alfred M. Elliott

Journal of the Minnesota Academy of Science

No abstract provided.