Life Sciences Commons^™

Bionomics Of The Clover Leaf Weevil, Hypera Punctata (Fabr.), In Utah, Lorin C. Fife

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Clover Leaf Weevil, Hypera punctata (Fabr.),* is a foreign pest introduced from Europe into New York, which first became noticeable in 1881. The insect has rapidly spread westward reaching Utah at least by 1912. Since this time several out-breaks have occured. In 1927 the injury to alfalfa, Medicago sativa, was severe in limited areas in Hooper, Weber County, and in 1927 and 1928 the infestation was very pronounced in certain parts of Salt Lake City.

The Effect Of Ultra-Violet And Infra-Red Rays Upon The Fission Rate Within A Single Clone Of Paramecium Caudatum And The Heritability Of That Effect., L. Sebastian Rose

Electronic Theses and Dissertations

Light in its various phases exerts a marked influence on the functional as well as the physical structure of all living matter. The phenomena of light involves two theories: (1) the wave or electro-magnetic theory conceiving light as consisting of electric emanations or waves of various frequencies and intensities given off from many substances. (The principle source of light as thus conceived is the sun with its estimated temperature of 10,000 F.); (2) the quantum theory which conceives light as a factor involved in ionization in chemical reactions (negative electrons are ejected from a surface of metallic iron when a …

The Morphology, Life History, And Control Of Some Common Species Of Oniscoidea Found In South Dakota, M. T. Fredricksen

Electronic Theses and Dissertations

Since practically no work has been done upon the life history and development of the common pill bugs or sow bugs, it is the aim of this paper to record the investigations of the life history and development as carried on by the author. The morphology was added in order to give the reader a definite idea of the organization and structure of these species.

The Effect Of Treatment With Ethylene Chlorhydrin Upon The Respiration Of Sweet Potatoes (Ipomea Batatas), Leon J. Tyler

Electronic Theses and Dissertations

1. Treatment with ethylene chlorhydrin produced marked results in the respiration of four of five varieties of sweet potatoes tried.
2. Not all varieties of sweet potatoes respond alike to the same treatment. Porto Rico variety of sweet potatoes did not respond to the treatment.
3. There was a considerable difference in the amount of CO₂ respired by different varieties.
4. The need for further research here with respect to the specific effect of chemicals upon the cell system becomes apparent and again emphasizes the importance of Biochemistry.
5. There was possibly an accelerative effect on sprouting due to increased respiratory processes brought about …

A Contribution On The Staminate Flower Of Cucumis Sativus, Kenneth W. Simons

Electronic Theses and Dissertations

In Heimlich’s recent paper (2) on the staminate flower of Cucumis sativus, the conclusion was reached that the tetrasporangiate stamen was complete while the bisporangiate stamen was only half complete. In Miller’s more recent investigation of Schinocystis lobata (4), the bisporangiate stamen was shown to be complete and the tetrasporangiate stamen double. These opposing points of view suggest the advisability of further investigation in the Cucurbitaceae. Since Heimlich described two separate apical prolongations on each tetrasporangiate stamen and only one on the bisporangiate stamen, it seemed to the present writer that these prolongations might indicate the double and single natures …

A Systematic Treatise Of The Coccidae (Scale Insects) Of Brookings County, South Dakota, Merrill K. Riley

Electronic Theses and Dissertations

It is the purpose of this paper to present in an introductory manner a systematic treatise of the scale insects of South Dakota, by making an intensive study of all species represented in Brookings County. It can be asserted that this paper is a complete treatise of all species present, but a thorough attempt was made to obtain specimens of all existing species. This treatise involves only the species now present, though at times other forms have been reported. Notes have been included giving the plants, location, and abundance.

Studies On The Intestinal Absorption Of Histamine. I. The Effects Of Various Chemical Agents Applied To The Mucosa, Lambert Francis Mammoser

Master's Theses

No abstract provided.

Truancy In The Public Schools : Its Cause And Cure., Kathleen Miller

Electronic Theses and Dissertations

In this age in which we live it is not hard to find a problem but it is often difficult to choose one. These problems have arisen as a result of the complex social and industrial institutions which have evolved as a result of human inventiveness and the competition among men to better our living conditions and increase our comforts. According to statistics compiled by the General Federation of Women's Clubs, the proportion of those who enjoy these modern conveniences is small when compared to those who have suffered as a result. The problem of this study is one which …

Sporogenesis In Botrichium Virginianum Swartz, Lewis Abel Stocking

Bachelors’ Theses

The earliest resultful work done in Pteridophytes, very closely similar to Botrychium Virginianum Swartz, was the work of Goebel (1890) on the Ophioglossales. Bower (1890) followed Goebel in his work on the Ophioglossales. He completed a work in 1896, which according to Burlingame (1907), who also did valuable work on the Ophioglossales, is the most comprehensive and satisfactory that has thus far been done. This work had a stimulating effect upon the early study of Botrychium Virginianum Swartz because of the almost entirely similar histology of the two plants. Burlingame’s (1907) work in the Ophioglossales, was done in 1907. He …

The Anatomy Of The Honeybee, Carol M. Steib

Bachelors’ Theses

The honeybee has lived In a society under such complex laws and has executed such varied and difficult labors that it has attracted the attention of men and women from the very earliest of times. Aristotle, Cato, Varro, Pliny, Columella, Pollodius, all studied the bee; as also did Arlstomachus (who, if we are to believe Cicero, watched them for forty-eight years) and Phylisius whose writings have been lost.

Branched Cells Of Pteris Cretica L., Var. "Albo-Lineata, Hort And Pellaea Viridis (Forksk) Prantl", Mary Elizabeth Trechter

Bachelors’ Theses

The fern gametophyte offers a large field for experimental work, not only in the reproductive processes but in the development of prothallia from the germination of the spore. The ordinary fern spore germinates on soil or in water. Prothallia, which have formed branched cells, have been found by a number of workers, and attempts have been made by some to explain the cause of the branching.

The Development Of The Gametophyte And The Apogamous Embryo Of Pellaea Viridis (Forksk) Prantl, Eugene Stowell Mcdonough

Bachelors’ Theses

A sporophyte tissue element in the cells of a fern gametophyte was first reported by Leszcyc-Suminski (1848) who found tracheids near the apical notch of the prothallium of Pteris sulcata L.

Favorable Cultural Conditions For Tuber Development In Nephrolepis Cordifolia (L.) Presl. (Nephrolepis Tuberosa (Bory.)Willd.), Hazel Mae Henderson

Bachelors’ Theses

Recently there has been brought to the attention of writers a number of plants that produce water-storing organs commonly known as tubers. Luerssen, (Campbell, 1905) refers to special reproductive bodies or tubers in Marsilia hirsuta. These tubers are thought to survive long periods of drought, and to germinate under favorable conditions. Nephrolepis cordifolia (L.) Presl., one of the Boston ferns, which produces tubers in large numbers has interested a number of investigators.

The Anatomy Of The Timber Rattlesnake, Ruth H. Heinemann

Bachelors’ Theses

Snakes are the most highly specialized of all reptiles. The absence of limbs, in itself, is a great specialization. They possess a great modification of the jaws which enables them to engulf large prey entire. Probably the most out­ standing specialization is the remarkable modification of dentition in the venomous snakes. The so-called fangs are nothing more than teeth modified to a great degree.

The Distribution, Taxonomy And Ecology Of The Genus Salix Of Utah County, Utah, Kenneth Edward Weight

Theses and Dissertations

The purpose or this paper is to make the willows of Utah end especially Utah County familiar to persons of moderate taxonomic skill. The Willow Family has become somewhat neglected by classes in taxonomy and the botanist in general because of not having a key -- except in one or two cases, that takes into consideration characters other than the fruits or capsules. To identify a willow in late summer is almost impossible by the beginning botanist, because few, if any, flowers, fruits and capsules can be found. In this paper external cheracters will be considered in descriptions. It must …

Inheritance Of Awns In A Cross Between Hard Federation And Kota Wheats, B. Ira Judd

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the past few years there have been numerous studies made of various characters in wheat. Some characters which were thought at first to be simple in inheritance have since been found to be rather complex.

The data in the following pages are the results of an investigation made to study the inheritance of awns in a cross between Hard Federation and Kota varieties of wheat.

Correlated Inheritance In Wheat Iii Federation X Iii C 18 (Dicklow X Sevier Hybrid), D. E. Heywood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Several wheat characters have been shown to exhibit rather complicated inheritance. Examples are such characters as culm length, spike density, and awn classes. This paper reports a study of the inheritance and of the correlated inheritance of these and some other plant characters in a cross between a hybrid of Dicklow X Sevier (III C 18) with Federation.

Biological And Psychological Study Of Twenty Pairs Of Twins Ranging From Seven To Eighteen Years Of Age, Albert C. Worden

University of the Pacific Theses and Dissertations

Although twins have always been of great Interest the only early data available are upon conjoined twins. The first record of such twins, which 18 known, 1s of the Bid-dendent Maids in the year 1100 A. D. From that date to the year 1824 when the Siamese Twins were born and later made famous by Barnum and Bailey's Circus, there have been many Interesting accounts of conjoined twins, but the nature of the present work and the probable unreliability of these accounts would make any discussion on the subject of these early conjoined twins not worth while.

A Critical Study Of Blood Sugar Determination, Myrtle L. Sand

Bachelors’ Theses

There are many methods, for the determination of this sugar, in use now, some used widely others not so widely. Methods vary as to accuracy and there has been many comparisons made between various methods. There is a recognized clinical need of a method for a quantitative sugar determination which will be quick, accurate, and adapted for use with small blood samples. As a result of this last, namely adaptation for use with small blood samples, several micro chemical methods have been published. One of these is the Epstein method. It is simple and supposed to make the estimation of …

The Development Of The Gametophyte And Apogamous Sporophyte In Cheilanthes Feei, Moore, Florence Madeline Steil

Bachelors’ Theses

Since Leszeye-Suminski's (1848) discovery of tracheids near the apical notch of the prothallium of Pteris sulcata, problems pertaining to apogamy or related phenomena have offered a wide field for botanists. Nearly all workers interested in the study of apogamous ferns, have contributed something of physiological or cytological interest

Some Methods Of Vegetative Reproduction In Nephrolepis Cordifolia, Presl, Mildred Frances Hubel

Bachelors’ Theses

Nephrolepis cordifolia, Presl is reproduced by means of spores, rhizomes, runners, and tubers. Little work has been done, however, on the tubers. In fact, the tubers are generally thought to be for storage only and consequently of little importance. At the Royal Palm Nurseries, Oneca, Florica where the plants for this study were obtained, the tubers were removed and thrown away. When a request was made for a large plant with the tubers, they replied: "We cannot supply the large cordifolia with the bulbs, as they were pruned off all our plants. They do not present a very attractive appearance …

A Study Of The Seasonal History Of Alfalfa Flowers As Related To Seed Production, John W. Carlson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A few researches have been concerned with the structure and pollination of alfalfa flowers. Others have considered the biological problems concerned in the pollination and fecundation of the flowers. In none of these studies, however, has an attempt been made to follow carefully the alfalfa flowers through various stages of development. Nor has any effort been made to determine what effect the condition and duration of these stages may have upon the resulting seed crop.

The work that follows is a study of the changes through which the alfalfa flowers pass during the season while functioning as organs of seed …

Distributional List Of The Birds In Utah, Clarence Cottam

Theses and Dissertations

Systematic ornithology has been woefully neglected in Utah. While this state has a number of men who know her birds and who have aroused interest in them, they have produced no published record of what we have. So far as the writer knows there is no adequate, representative, or systematic collection of Utah species within the state. Utah has, however, been fortunate in having a nuraber of expert ornithologists collect and study the bird life of different sections of bar territory.

The Ontogeny Of The Vascular Elements In Zea Mays, George L. Cross

Electronic Theses and Dissertations

1. The vascular bundles of Zea mays are of the monocot type, except that true amphivasal bundles are found only in the leaves.
2. The xylem and phloem are arranged collaterally, with the xylem occupying the part of the bundle nearer the center of the stem.
3. The xylem is composed of from 2 to 4 protoxylem elements, and two pitted vessels. The elements of the protoxylem are arranged in a radial row, and consist of 1 or 2 annular on the inside, and 1 or 2 spiral elements on the outside. Sometimes the outermost element (in respect to the stem) is a …

The Introduced Plants Of South Dakota, William Houk

Electronic Theses and Dissertations

The vascular plants, native and introduced, in the herbarium of South Dakota State College total 97 families, 511 genera, and about 1279 species. The representation of introduced plants as indicated in the list given below is: 22 families, 75 genera, and 110 species. Only two families have over twelve species; these are Gramineae and Cruciferae, with 30 and 15 respectively.

A Study Of Pollen, Sterility, And Blossoming Dates Of Plum Varieties In The Experimental Nursery At South Dakota State College During The Spring Of 1926, Russell W. Vance

Electronic Theses and Dissertations

The Agricultural Census of the United States for 1920 shows that plums rank second to apples in value in comparison with the other orchard fruits, small fruits and grapes produced in South Dakota. There was an eighty-two percent increase in the value of all orchard fruits produced during the year 1919 over the year 1909. The fact that the majority of the more important commercial varieties of plums are entirely self-sterile and others more or less self-sterile is often one reason for the total or partial failure of the orchard to produce fruit when a plot is planted to one …

A Study Of Certain Physical And Chemical Characteristics Of Flaxseed And Of Linseed Oil, With Especial Reference To Date Of Harvest, Leo F. Puhr

Electronic Theses and Dissertations

From the review of the foregoing literature on flax, it is evident that little work has ever been done on the chemical composition of flax. Most of the work on flax up to the present time has been confined to the diseases of flax, principally the securing of varieties that are resistant to wilt. In an attempt to secure information in regard to the factors affecting the physical characteristics and chemical composition of flaxseed the following work has been done in this experiment: 1. The effect of time of harvesting upon physical characteristics of the seed. 2. The relation of …

A Study In The Metabolism Of The Adult Honey Bee, M. D. Farrar

Electronic Theses and Dissertations

The study of metabolism in the higher forms of life has been carried on for many year and much has been found out that has been of great importance in understanding the way things live and grow. It has been only in the last few years that attention has been given to this phase of the work in insects. The extensive work that has been carried on concerning metabolism in men and animals is the basis for the more recent researches on the lower forms including the microorganisms. Before this work could be carried out on the small forms it …

A Consideration Of Methods Of Securing Historical Price And Production Data And A Survey Of Their Relationship For South Dakota, Owen L. Dawson

Electronic Theses and Dissertations

In our studies of prices we will analyze the present prices; discuss the use of price date now available and consider methods of collecting further data. As South Dakota is one of several states or countries producing a surplus of crops and livestock for market, production for the United States and for the world, of certain products, must be considered as affecting the farm prices in South Dakota.

The Effect Of Treatment With Ethylene Chlorhydrin Gas Upon The Respiration Of Dormant Potato Tubers, Leon M. Pultz

Electronic Theses and Dissertations

Chemicals have long been in use as mean of eliminating or abbreviating the rest period of various plant organs. Usually, however, they have been in the hands of workers who were interested only in forcing the resting parts into growth and not in determining the physiological effect of the chemicals upon them. Since Appleman (1) presents a very comprehensive review of the earlier literature pertaining to the subject, it will not be again presented here. More recently Denny (4, 5) has given now impetus to this work by demonstrating that ethylene chlorhydrin and various other chemicals will greatly shorten the …