Life Sciences Commons^™

A Cyto-Genetical Study Of Habronbracon Juglandis, Joan Meyer

Bachelors’ Theses

A cyto-gentical study was attempted of the males of the Ichneumonoid wasp Habrobracon juglandis (ashm.) The larval of this wasp are parasitic on the larval of a flour moth Ephestid kuekniella (zeller). The males of this wasp were disected and slides were made of the testes. Different staining techniques were used in order to determine which ones would give the best results.

The Development Of Bone In The Chick Embryo, Helen M. Koelsch

Bachelors’ Theses

The day by day development of the bone in the chicken embryo as determined by the fixing and staining of embryos for each twenty-four hour growth period during the time of greatest skeletal development, is the subject of this paper. The stage in the embryological history of the chick during which the most important phases of bone development occur was determined to be the period between the seventh and the sixteenth days of incubation. It is therefore the purpose of this investigation to give an account of the growth and development of the bones of the ordinary domestic fowl as …

Histology Of The Stomach Of The Common Green Snake, Thamnophis Sirtalis, Lois Doerfler

Bachelors’ Theses

This is another in the series treating the histology of the digestive tract of the reptile. Very little comparative work has been done on the digestive system as a whole and less attention has been paid to the stomach. Kendall (1940) and Cole (1941) devote a slight discussion to a general description of the reptilian stomach. The following report is a more detailed microscopic investigation of the anatomy of the stomach of one of the common species of snakes...

The Utilization Of Grasses And Forbs In Relation To The Intensity Of Grazing In The Mixed Prairie Near Hays, Kansas, Noel Runyon

Master's Theses or Doctor of Nursing Practice

The principal occupation of the inhabitants in the Great Plains Region is livestock farming. The problems confronting the farmers and ranchers of this large area are many and varied. Not the least of these problems is the one of a proper stocking rate for the various types of ranges in order to secure a maximum production with the least in capital outlay and range deterioration. Another problem that has presented itself in recent years is the one of revegetating thousands of acres of marginal and semi-marginal land so that mother nature may again heal the marks of erosion and bring …

A Discussion Of Histological Technique With Special Reference To Double And Triple Staining, Margaret J. Mckinney

Biology Honors Papers

This 18 page thesis discusses the process of fixing, dehydrating and clearing tissues, as well as the effects of various types of dyes and staining methods.

The Effect Of Salt Water On The Pituitary Gland And The Reproductive Glands Of The Male Rat, Matthew J. Kennedy

Bachelors’ Theses

In this thesis a study was made of the histology of the reproductive system of a male, buff rat.

A Comparative Study Of Dehydration And Infiltration, Jane C. Mahar

Bachelors’ Theses

Dehydration is the process of removing water from tissue which has been fixed and hardened. It is a necessary step for the Infiltration of paraffin. If the dehydrating agent is not a solvent of the paraffin, it is necessary to use a solvent first and then infiltrate with paraffin. Dehydration, according to Sass (1940), has some washing action besides making the material firm and, in some cases, hard and brittle. When Bouin’s fixing fluid is used, ethyl alcohol is the solvent used in removing the solution and in washing the material. Dehydrating agents which possess hygrosopic properties are those most …

Heterothallism In Schizophyllum Commune, Lois G. Wilbershide

Bachelors’ Theses

For many years, workers have been striving to arrive at definite conclusions in regard to heterothallism in a great variety of plants. Much work has been done and there are many instances where heterothallism has been established and confirmed. Yet, in regard to Schizophyllum commune, few investigators have studied this phenomenon. However, much work of a different nature has been done on Schizophyllum since 1719 when attention was first called to this fungus partly because of the peculiar split character of the gills. It has been collected, classified, and worked on since that time, but the greater share of the …

A Study Of The Respiratory System Of The Sparrow (Passer Domesticus), Ben Peter Arnowitz

Bachelors’ Theses

The respiratory mechanisms of birds, unlike that of mammals, are definitely adapted to the function of flight. Because of this added adaptation, we should expect, therefore, some morphological and perhaps even embryological, physiological, and histological differences. An example of a morphological difference between birds and mammals is the intricate system of air-sacs that are present in birds. This remarkable feature is probably the reason why birds are able to fly as they do.

In this thesis the writer has used the sparrow (Passer domesticus) for the basis of his experiments. This particular bird was chosen in preference to …

Some Physical And Chemical Properties Of Wheat Starch In Relationship To The Maturity Of The Wheat, Claude W. Bice

Master's Theses or Doctor of Nursing Practice

Wheat is one of the most valuable of economic plants and is grown extensively throughout the world. Because of the unique chemical and physical properties of its gluten, wheat is superior to all other cereals for bread making. Its high starch content provides a tremendous source of energy as a food, as well as filling certain industrial starch needs, especially in textile manufacturing . The present study on properties of immature and mature wheat starches should be of inestimable worth for evaluation of damaged wheats for starch production, as well as for yielding fundamental information which may facilitate the use …

Effects Of Rootone On Shoot And Root Growth Of The Soy Bean And The Effects Of Nutrient Salts On The Same, Thomas Pastras

Biology Honors Papers

This thesis provides background information on plant hormones and plant physiology and describes an experiment on the effects of growth hormone on the root and shoot of the soy bean plant.

Species And Parasitic Diseases Of The Genus Viola In Milwaukee County, Ruth E. Gass

Bachelors’ Theses

This study was conducted to determine the species of Viola and parasitic diseases of the genus Viola. The specimens were collected in Wauwatosa, located in Milwaukee County; a few plants were collected in Jefferson County.

Population Size And Longevity Of Males And Females In Drosophila, Kathleen M. Murphy

Bachelors’ Theses

The two ever present instincts of man are self-preservation and the propagation of the race. At the beginning of one’s life this urge to survive is wholly unconscious but later on this will to live Is supplimented within the individual as a definite conscious search for longevity. Awareness to this inherent and universal desire to live is evidenced by the sought after services of the physician or doctor; the presence of civil law with the law courts and many other protective establishments. This conscious awareness to the possibilities, no matter how slight, of extending or at least maintaining life has …

Studies Of The Excretory System Of The Passer Domesticus, James Julian Stout

Bachelors’ Theses

In past years and in recent years most animals have been made a subject of study. However, very little or no research has been made on the most common of all birds, the English Sparrow. This thesis will endeavor to take up the study of the excretory system of the Passer Domesticus. In most animals the excretory organs are the kidneys and the skin, which pass of nitrogenous and other waste matters from the body. I will take up the main organ of this system the kidney at this time, with a histological study of the ureter, and leave the …

A Study Of The Digestive System In The Sparrow (Passer Domesticus), Henry Joseph Wisniewski

Bachelors’ Theses

The digestive tube proper of the Sparrow beings with the Oesophagus. This is a soft tubular organ which serves to convey food rapidly from the pharynx to the stomach. It extends along the median ventral margin of the neck lying dorsal to or to one side of the trachea. Posteriorly, at the base of the neck and shortly in front of the sternum it broadens slightly and gives rise to a dilated region of the oesophagus, namely the Crop, "whose secretion serves to moisten the food or even to initiate digestion." In larger birds as in the pigeon, the crop …

The Urogenital System Of The Male And Female English Sparrow, Passer Domesticus, Peter Paul Wisniewski

Bachelors’ Theses

The testes is a pair of oval organs posterior to the lungs and anterior to the kidneys. Each testes is attached by a mesentery to the anterior end of the kidney. An adrenal gland is located at the anterior portion of each testes. The vasa deferentia are slender convoluted tubules. Each arises from the median edge of the testes passes cauded along the ventral surface of the kidney, paralleling the ureter and enlarging slightly at the distal end to form a small seminal vesicle, which enters the urogenital region of the cloaca by a papilla. The male urodaeum is smaller …

An Electrophoretic Determinatin Of The Properties Of Methacrol M.E. By The Use Of A Capillary Cross-Arm "U" Tube, Richard Reiland Bains

Bachelors’ Theses

this research was undertaken primarily to discover the use of a capillary cross-arm "U" tube in the determi­nation of the electrophoretic and other electrical proper­ ties of a plastic emulsion.

The primary objective was to determine the isoelectric point of the emulsion and also the optimum pH or electro-endosmotic motion.

The secondary and distant objective was to note when, how, and it any coherent plating on the electrodes took place.

The Study Of The Effects Of Paradichlorbenzene On Drosophila Melanogaster, Dwain J. Paal

Bachelors’ Theses

The object of this investigation was to produce polyploid cells in the salivary glands of Drosophila melanogaster by treatment with paradichlorbenzene. Polyploidy is the condition in which the number of chromosomes in the nucleus is an exact multiple of the somatic or diploid number greater than two. This phenomena has often been referred to as produced by incomplete nuclear division.

The Influence Of Dowicide A On Drosophila Melanogaster, Helen Mary Dore

Bachelors’ Theses

Drosophila melanogaster plays a far greater part in science than man at first realizes. A study of their heredity makes it possible to develop laws of human here­dity and with this knowledge, thus provide for the better­ment of mankind. Considerations which lead to the choice of the fruit fly, Drosophila melanogaster, in experimentation are briefly the following: (a) its small size which makes, it convenient to keep; (b) its short life cycle; and (c) the ease with which it can be cultivated. Since fruit flies are so important to science, it follows that it is also important that a …

Growth Seed Yields, And Seedling Production Of Native Prairie Plants In Various Habitats Of The Mixed Prairie, H. Ray Brown

Master's Theses or Doctor of Nursing Practice

The native vegetation of the mixed prairie of west-central Kansas was subjected to the worst drought on record during the period 1933 to 1939 inclusive. Data secured from the United States Weather Bureau reveal the fact that precipitation during this period of drought was far below normal . The rainfall deficit as reported by Albertson and Weaver (1942) was nearly 35 inches for this 7-year period. Other climatic factors such as wind movement, relative humidity, and temperature were equally abnormal. The extreme drought period greatly modified the vegetation of the mixed prairie and the short-grass disclimax. The basal cover in …

The Biological Effect Of An Invisible Radiation On The Drosophila Melanogaster, Leo C. Massopust Jr.

Bachelors’ Theses

In a series of investigations, Massopust describes various effects he obtained with an invisible radiation which he called infra-red. The results he obtained seemed to indicate that this radiation might have some effect on development and growth. Hence, the Drosophila Melanogaster was chosen for experimentation to ascertain whether or not the invisible radiation he used would produce mutations. Personal communications from this author disclosed that up to the present writing he has not been able to establish definitely that the radiation lies somewhere in the infra-red band of the electro-magnetic field. He does, however, favor the interpretation that it is …

Regeneration Experiments With Planaria Maculata, Leon North

Biology Honors Papers

This 16 page thesis describes experiments conducted on planaria to determine the effect of vitamin B solution on the rate of regeneration.

The Preparation Of Corrosion Specimens, Llewellyn W. Hunsicker

Biology Honors Papers

This 11 page thesis describes the technique involved in making a Wood's metal cast of the lungs as well as the preparation of a vinylite corrosion specimen of the vascular system of a cat.

Injection Of Circulatory System Of Chick Embryos, Mary T. Dimedio

Biology Honors Papers

This 16 page thesis discusses embryo development, formation of the circulatory system and a history of embryo injection. It also provides methods of removing, fixing and mounting the chick embryo.

The Development Of The Megagametophyte Of Ailanthus Altissima., Esther L. Bossung 1912-1994

Electronic Theses and Dissertations

No abstract provided.

Leaf Diseases Of Sorghum., Douglas C. Bain

LSU Historical Dissertations and Theses

No abstract provided.

The Perfect Stage Of Colletotrichum Falcatum., Fernando Carvajal

LSU Historical Dissertations and Theses

No abstract provided.

Student Agricultural Work Experiences In San Joaquin County, With Particular Reference To The Work Experiences Of Students Of Stockton And Lodi Public Schools In The Summer Of 1942, Frank L. Nash Jr.

University of the Pacific Theses and Dissertations

As early as February, 1942, fears of an agricultural labor shortage began to be expressed in California. The Pacific Southwest Area Committee of the Young Men’s Christian Association asserts in a statement of policy on Emergency Harvest Camps, “The California State Chamber of Commerce’s Central Coast Council’s Agricultural Committee points out that ‘the removal of enemy aliens from coastal areas, the absorption of migrant workers into defense industries, and increased government quotas for the production of many crops has created a serious agricultural problem.’ (News release, February 28, 1942).”

In San Joaquin County 5,000 Japanese were evacuated. Most of these …

The Life History Of Cyclocoelum Microcotyleum, George Alfred Butler

University of the Pacific Theses and Dissertations

Monostome trematodes of the family cyclocoelidae, taken from the American coot, Fulica americana, were described as a new species, Cyclocoelum microcotyleum, by Noble in 1933. These flukes were found in the air-spaces or the coelomes of birds taken from the waterways near Stockton, California.

Before this present work various attempts had been made to determine the lite history of this fluke. A number of fresh-water snails, indigenous to the region in which the definitive host was found, were exposed to miracidia of this fluke, but observations or infection were not obtained. In the winter of 1940-41 specimens of …

A Study Of Sex Differentiation In Lebistes Reticulatus As Affected By Estradiol Stilbestrol And Pregneninolon., Esther Coogle

Electronic Theses and Dissertations

No abstract provided.