Life Sciences Commons^™

Reflex Respiratory Effects From Intermittent Stimulation Of Vagus And Superior Laryngeal Nerves, Charles Hillenbrand

Master's Theses

No abstract provided.

Some Actions Of Sodium Salicylate On Scorbutic Guinea Pigs, Jacob John Giardina

Master's Theses

No abstract provided.

Conjugation Of Various Amino Acids With Insulin In Liquid Ammonia, Charles Jon Caul

Master's Theses

No abstract provided.

Reduction Products Of D-Glucoheptulose, Stanley John Kuman

Master's Theses

No abstract provided.

The Influence Of Overgrazing On The Density And Number Of Palatable And Unpalatable Desert Forage Plants, John H. Mcguire

Theses and Dissertations

The data for this problem were collected at the Desert Range Experiment Station and on adjoining public domain lands during the summer of 1934, for the purpose of studying the influence of overgrazing on the increase of palatable and unpalatable desert forage plants. A vegetative description of the two areas studied has been prepared and presented.

The Skeletal, Muscular, Vascular, And The Digestive Systems Of The Ferret (Mustela Putorius) And A Comparison Of These Systems With Those Of The Domestic Cat (Felis Domesticus)., Arthur Pincus Skwerer

Electronic Theses and Dissertations

No abstract provided.

Weeds In Sacramento County Of California, Ross Clover

University of the Pacific Theses and Dissertations

Sacramento County has many types of Agriculture and many weed pests which compete with the crops. Stock may be poisoned by certain weeds and weeds may also act as hosts for fungus diseases, virus diseases and insect pests of cultivated crops. Many plants may be weeds in one locality and harmless or beneficial in other parts. The author has made a thorough study of the country's agriculture and its weeds. Latest control practices were also studied.

The Reptiles Of Cherokee County, Kansas, Myron Alec Hurd

Electronic Theses & Dissertations

Cherokee County has an area of 585 square miles. The greater part is covered with hydrophytes and mesophytes, but there are some Xerophytic areas. A large part of its area is covered with typical prairie grassland. Thickets of plum, sumac, persimmon, hawthorne, blackberry, and buck brush occur in pastures and wastelands. Along the streams may be found the elm-ask-oak assocations and other plants. Along the embankments may be found blackberry, sumac, and wild rose. Surrounding the ponds and marsh areas are rushes, reeds, button willows, and willows.

The mean annual temperature is 56 degrees fahrenheit. The three summer months average …

A Study Of The Stem Anatomy Of Aristolochia Sipho A., Rudolph F. Dobry

Bachelors’ Theses

Plant anatomy has been studied for over 265 years. The discovery of the plant cells by Robert Hooke in 1665m stimulated studies in regard to these structures.

A Further Study Of Utah Asilidae, D. Elmer Johnson

Theses and Dissertations

This study is based on a similar study made by Claudeous J. D. Brown in 1928, and published in 1929. The species he used have been rechecked, and additional ones have been studied. The species considered in this study represent three of the four subfamilies of North American Asilidae. These three subfamilies are Dasypogoninae, Laphriinae, and Asilinae. This study is limited to those species in the Brigham Young University Collections, and to species recorded in print. No claim is here made that all the forms inhabiting the state have been discovered, in fact the writer is well aware of the …

The Development Of The Embryo Of Iris Missouriensis Nutt, C. Eugene Larsen

Theses and Dissertations

There is but a single species of Iris native to Utah. This is Iris missouriensis Nutt. This plant was chosen for investigation because of its possible significance and because material of this species was readily available. The embryo of Iris missouriensis Nutt. shows some resemblance to the Lily type in its development of an irregular dividing suspensor. It also resembles the Orchid type in the usual development of sixteen cells before the dermatogen is cut off. In general development, however, the writer believes it to have an embryo sequence more similar to the Alisma type than to the dexcriptions given …

Nervous System Of Felis Domestica, Rachel Creighton Mcavoy

Biology Honors Papers

This 34 page thesis examines the embryology, anatomy and histology of the nervous system of Felis domestica.

The Flora Of The Tasco Lake Region, Sheridan County, Kansas, Raymond W. Darland

Master's Theses or Doctor of Nursing Practice

It has been customary in writing theses dealing with taxonomic problems to collect data from an entire county. Having had occasion to collect botanical specimens from the Tasco Lake for work in biology at the Sheridan High School, the wealth of plant life to be found here became apparent. The area ranges from xerophytic forms on the uplands to the hydrophytic forms in the lake and marshes. Many of the latter have never been reported from Western Kansas. Collections in preserving fluid were made of the water forms found and specimens of the landforms were mounted on regulation-sized sheets properly …

A Study Of Some Phases Of The Gametophyte Of Preissia Commutata Nees, Marion Steuber

Bachelors’ Theses

The beginnings of the exact knowledge of the Hepaticae dates from the work of Hofmeister, who in 1350 to 1362 published important investigations on them. He discovered the egg cell in the archegonium, traced the sperm to the surface of the egg and showed that it was fertilized by the sperm.

Spermatogenesis Of The Albino Rat (Nus Norvegicus Albus), Norman A. Frankenstein

Bachelors’ Theses

This thesis deals with the inquiry opened by the fundamental discovery that the gamete nuclei, and hence, the two parents from which they are respectively derived, con­ tribute each a haploid or single group of chromosomes to the fertilized egg. Each act of fertilization doubles the gametic number of chromosomes; yet the number of characteristic of the species remains constant from generation to generation. Somewhere in the life cycle, accordingly, the diploid or somatic number must be reduced by one-half to the haploid or gametic number. The first explanation was that reduction took place by some process of degeneration or …

Types Of Vascular Arrangement In Some Homosporous Leptosporangiate Ferns, Grace Ann Kreuz

Bachelors’ Theses

The vascular structure of Leptosporangiate and Eusporangiate ferns has been studied by a number of Botanists.

Histological Study Of The Structure Of The Testis Of Rana Pipiens, John L. Friedl

Bachelors’ Theses

All the living organisms, be they plant or animal, act as a unit which implies that the various anatomical and physiological systems are coordinated either for the benefit of the Individual itself or for the maintenance of the spe­cies. For convenience sake, the individual is divided into a digestive,. respiratory, circulatory, nervous, muscular, and skeletal systems; but there is one system which although of some value to the individual is primarily adapted for the production of other individuals, and this is the reproductive system.

The Growth And Development Of Gemmae Of Marchantia Polymorpha L., Theodore F. Van Aacken

Bachelors’ Theses

Marchantia was discovered and studied around the middle of the seventeenth century. It was named Marchantia in 1683 by Jean Marchant in memory of his father. Later when Linnaeus completed his great work, Das Pflanzenreich (1786), he named the plant Marchantia polymorpha.

The Anatomy Of The Oyster, M.J. Rohlinger

Bachelors’ Theses

The phylum Mollusca manifests the following characteristics: bilateral symmetry; three primary germ layers; free-living and sessile; marine and fresh-water; a shell modified to form either a bivalve or a univalve which gives an appearance of segmentation due to rings of growth or arrangement of certain parts of the shell as is seen in the class Amphineura, this is only apparent metamerism because the Mollusca are considered to be unsegmented animals; a coelom poorly developed; a foot; a mantle cavity; well developed digestive, circulatory, excretory, and reproductive systems. When one inspects a Chiton, an oyster, a snail, an octopus, or a …

Topographical Anatomy Of Ostrea Virginica, Harry J. Barnett

Bachelors’ Theses

The oyster is important for at least three reasons. First, it is important to the zoologist; second, it is a food which has developed million dollar enterprises; and third, the oyster is a domestic resource for the pearl and its allied industries. The oyster is a bivalve Mollusk, having symmetry in the larval stage but losing it in the adult stage. It has one large adductor muscle, somewhat posterior from the ligament which holds both valves together. The left valve forms a deeper pit than the right one as it is in the left valve that the oyster lies. It …

Index Numbers Of South Dakota Farm Prices, Leslie Max Brown

Electronic Theses and Dissertations

During the last generation, index numbers have gradually gone into general use among economists, statisticians, and business men. Because a farmer is a business man, it is important that he know what the trend of farm prices have been in the past and what the current trend is, so that he may anticipate changes which statistical analysis show are taking place in his particular phase of business.The Main objective of this study is to revise the existing South Dakota Farm Price Index. In order to furnish a comparable background for the presentation of these results it was found desirable (1) …

The Abortion Of Essential Organs In The Imperfect Flowers Of Benzoin Aestivale, Norris M. Paulson

Electronic Theses and Dissertations

There have been a number of investigations dealing with the abortion of essential organs in the imperfect flowers. Ulvin submitted a paper on Abortive Stamens and Carpels in Lychnis alba, Simon described stamen and carpel abortion in Cucumis stativus, Schaffner was able to control sex expression in Arisamea triphyllum and secure sex reversal in Cannabis stiva, Bessey determined the relationship of sex to the age of pollen in Cannabis sativa.

An Analysis Of Crop Production In South Dakota By Types Of Farming Areas, Warren Richards Bailey

Electronic Theses and Dissertations

Farmers choose the crops they grow for two principal users; namely, for feed production or for cash income, or for both feed and cash income. It is true that some crops are grown for cover-crops, soil building, weed competition and a multitude of other miscellaneous purposes, many of them of equal or greater importance in the individual case than the two uses of crops which are the basis for this analysis. Crop production in South Dakota has been discussed since the first records of yields were available. the usual unit for production was the legal bushel of a specified weight.

A Microscopic Study Of Cross-Sections Of Woody Dicotyledonous Stems With Reference To Their Use In Courses In Elementary Botany, Nancy Jane Toms

University of the Pacific Theses and Dissertations

The problem of this study was to discover a woody dicotyledonous stem which could be used as the principal example of stem structure in a course in elementary botany.

Peat And Other Plant Residues Of Grand Marais And Lake Tasse, Iberia Parish, Louisiana., William Rufus Dodson

LSU Historical Dissertations and Theses

No abstract provided.

A Study Of Methods Of Determining The Rate Of Acid Hydrolysis Of Wheat Gluten, Angus V. Henrickson

University of the Pacific Theses and Dissertations

Because of the nutritious value of sodium glutamate and its meat-Like flavor, won 18 very pleasing to most people, and hence Its demand if it were properly promoted, and because of the abundance of protein in accessible form for its manufacture, it is only reasonable to assume that if too optimum continuous of protein hydrolysis were found, tho manufacturing metnous could be made a.highly successful enterprise.

The Distribution Of Anopheles, Their Wintering Activities, And Breeding Places In Bernalillo And Valencia Counties, New Mexico, Bright Elsworth Grenier

Biology ETDs

An impetus was given to the study of the Culicinae by the discovery of Sir Ronald Ross in 1898 that some mosquitoes are the vectors of the malarial parasites. A large amount of work has been done with the species belonging to the tribe Anophelini and it has been learned that vectors of the malarial parasites of human beings belong to this tribe.

Quantitative Studies On The Relation Of Soil Texture, Moisture Content, Hydrogen-Ion Concentration, And Soluble Salts On Vegetation In The Albuquerque Division Of The Rio Grande Conservancy District, Marvin D. Rohovec

Biology ETDs

The middle Rio Grande Conservancy District was established in 1926, and occupies a portion of the Middle Rio Grande Valley one hundred and twenty-five miles in length and averages three and six tenths miles in width. It extends from White Rock Canyon, fifty miles north of Albuquerque, to the north of line of the Bosque del Apache Grant, fifteen miles south of Socorro. This area, which lies in Sandoval, Bernalillo, Valencia, and Socorro Counties, has an altitude ranging from 4500 feet to 5500 feet. A general arid condition exists in the area with an average precipitation of about eight inches …

Notes On The Life Habits Of The Silky Pocket Mouse (Perognathus Flavus Baird), Garth Blakely

Biology ETDs

The observations reported in this paper cover a period of six months' collection and study, lasting from November 1935 until April 1936, inclusive. While this report is not to be considered as a complete account of the life habits of Perognathus and while there are certain phases which have not yet been determined, it is hoped that the observations recorded here will constitute a useful contribution to the knowledge of the life history of this species.

A Preliminary Study Of The Mountain Lion (Felis Cougar), Frank C. Hibben

Biology ETDs

During one year's time from October 1934 and extending over into September 1935, an investigator was placed in the field to make a special study of the mountain lion. The agency which was so interested was the Southwestern Conservation League which had received funds from private sources for the purpose of the investigation. The scientific aspects of the project were carried on under the auspices of the Biology Department of the University of New Mexico, The New Mexico Game Department and the United State Biological Survey also helped and fostered the investigation by supplying the means through their separate agencies, …