Life Sciences Commons^™

An Evaluation Of The Physical Facilities Of Negro Vocational Agricultural Departments In Tennessee, James Lemons

Tennessee State University Alumni Theses and Dissertations

No abstract provided.

Studies On The Reactivating Sclerotium Of Physarella Oblong Morgan With Special Reference To The Nucleus, William Thomas Allman

Master's Theses

The Myxomycetes, because of their naked, mobile mass of protoplasm have served biologists and chemists as material for the study of the char­acteristics of protoplasm. The typical life his­ tory of such an organism may be summarized as follows: The vegetative phase in the life history consists of a naked mass of protoplasm, to which Oienkowski (9) applied the name "plasmodium". This plasmodium creeps by reversible streaming over and throughout the substratum, deriving its food from various constituents of decaying vegetable matter which serve as its normal substrate. Upon reaching a state of maturity and under certain environmental conditions, the …

A Study Of Stimulated Respiration In The Adrenal Gland, Owen Foster Kline Jr.

Biology ETDs

The purpose of this paper is to present certain preliminary observations on what is believed to be completely new special metabolism in the adrenal gland of Hereford cattle. Although no direct correlation between any of the substances isolable from the adrenal gland and the respiratory system to be described in this paper has been obtained, it is nevertheless necessary to present a review of the chemical and medical data available pertaining to these glands.

The Man Of Tomorrow, Murray N. Silverstein

Biology Honors Papers

This 28 page thesis speculates on possible evolutionary changes that humans may undergo in order to survive the threats of atomic energy.

Ecological Changes In An Overgrazed Grassland Area Resulting From Eleven Years Of Protection Against Livestock Usage, Larry L. Gordon

Biology ETDs

The present paper, like many others already published, contributes to our knowledge of the effect of long time overgrazing and the recovery of lands temporarily retired from utilization. In the present study, an attempt is made to determine the effects of an eleven year recovery of grazing lands following misuse for nearly two centuries. The topics given detailed attention include the flora with particular reference to the grasses and forbs, the fauna with special emphasis on the rodents, and the climatic and edaphic factors.

The area in which the study was conducted is on the east side of the Rio …

Inheritance Of Resistance To Six Races Of Bunt, To Awns And Kernel Color In A Wheat Cross, Marr D. Simons

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wheat is the most important cereal crop of the world, and one of the most serious diseases affecting it over much of its range is covered smut or bunt (57). The word "bunt", according to Heald (48), is a contraction of an old English term, "burnt ear", which fittingly describes the ravages of covered smut.

Man's first knowledge of this disease is lost in antiquity, but it was first recorded by early Greek writers (97). Gaines (39), writing in 1928, stated that since 1924 stinking smut had been the most destructive parasite of wheat in America, causing losses of as …

Weather In Relation To The Yield Of Dry-Land Winter Wheat, Wajeeh R. Asfour

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Agriculture first developed in the Middle East where, probably about 15,000-10,000 B. C., the earliest wheat crop was reaped from cultivated wild grasses (Mann, 1946). In Biblical times the Middle East acted as the granary of the western world and led the world in cereal production. Now, however, the situation is different. The Middle East is one of the lowest yielding areas in the world. This failure of the agriculture of the Middle East may be due to both climatic and cultural reasons. Many students of the Middle East report that the climate has changed and that there has been …

Harvest Of Wild And Stocked Fish From The Logan River Drainage, Louis S. Pechacek

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Logan River, one of Utah's better trout streams, has carried more than its share of the increased fishing pressure of the past few years. Careful management of the drainage by the U.S. Forest Service has kept the Logan River free of serious water fluctuations and relatively unpolluted by silt and wastes. The only noticeable fluctuations in the stream is the annual runoff cycle which usually reaches its peak in May. This alone has contributed greatly to the ability of the river to withstand the increased fishing pressure which it has done quite well. The increase in fishing pressure can …

Life History Of The Cutthroat Trout Salmo Clarkii Richardson In The Logan River, Utah, George Gordon Fleener

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of the cutthroat trout in the Logan River drainage was initiated in cooperation with the Utah Cooperative Wildlife Research Unit and the Utah Fish and Game Department during May of 1948. The first field work began that month. The taking of fish was terminated in November, 1949, although several trips were made into the study area as late as January, 1950.

Some Observations On The Embryology And The Weberian Apparatus Of Catostomus Ardens (Jordan And Gilbert), H. Ronald Frogley

Theses and Dissertations

The purpose of this study is to add to our knowledge of the embryology and osteology of the Weberian apparatus as found in the sucker, Catostamus ardens J. & G. ot Utah Lake. Observations were made on the embryological development for twenty one days. This information has been discussed and pictures showing the development included. The literature on the osteology ot the Weberian apparatus was reviewed and it is believed that this study presents the first descriptions of the bones of this species. The ossicles were found to be comparatively stable within species indicating some taxonomic value. More study is …

Microradiography With Biological Specimens, Arthur D. Wellman

Bachelors’ Theses

Microradiography is a technique in which X-rays are directed through a very thin specimen onto a fine-grained photographic film and the image examined under magnification. It has been used chiefly as a supplementary tool in industrial analysis of metal structures, and even in this field has attained prominence only within the past decade. Its usefulness is limited to fine structures (except where minute flaws or impurities are to be examined in a material), and its success is limited by the degree of clarity in the radiograph to be magnified.

A Comparative Histological Study Of The Adrenal Gland Of Native Rabbits, Ernest I. Gonzalez

Theses and Dissertations

A review of the literature shows that extensive work has been done on the morphology and histology of the adrenal gland of the domesticated rabbit, but it appears that little or no work has been done on other members of the order Lagomorpha. Approximately one hundred specimens of rabbits of various ages and sizes, and of both sexes, were collected over a period of nine months. All adrenal glands were fixed by immersion and were embedded in paraffin. The majority or the glands were sectioned at eight or twelve miora, and were stained with Mallory's triple stain. This investigation shows …

Hive And Field Mortality Of Honey Bees In Northern Utah Due To Effects Of Certain Ecological And Chemical Factors, Shih Chun Ma

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The honey bee is the most important pollinating insect in Utah, because various important crops such as fruits, legumes, and vegetable seed crops depend chiefly on it for pollination. In the past, honey bees have suffered repeated severe death losses through contact with arsenic and other agricultural chemicals. Recently the newer insecticides, such as DDT, chlordane, parathion, benzene hexachloride, lindane, toxaphene, and several kinds of miticides have further complicated the problem of bee survival. In addition, natural enemies such as predators and parasites and some unfavorable environmental conditions, including unfavorable temperature and humidity, wind, storm, and other changeable weather conditions, …

Peromyscus Populations As Related To Seasons And Vegetative Types At The Hardware Ranch, Cache County, Utah, George Cleveland Turner Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Members of the genus Peromyscus, White-footed Mice, are known to occur in nearly all habitats of North America. Because of their numerical abundance and widespread distribution, these mice are extensively used in the study of the dynamics of animal populations. Thus, information perteining to the local distruibution and activities of these mice is of value to the more comprehensive studies that are being carried out in the field of zoological research.

A Survey Of Plant Parasitic And Associated Species Of Nematodes In The Carrot Producing Area Of Cedar Valley, Iron County, Utah, Paul R. Fitzgerald

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plant parasitic nematodes have long been known to cause extensive crop losses through reduced yields, shortened productive life, or lowered value of produce. The rood knot nematode, Heterodera marioni, is cosmopolitan. It destroys crops and causes economic losses equal to those of any other plant parasitic species. in 1948 this nematode caused an estimated loss to the carrot raising industry in Iron County, Utah of approximately $15,000. No estimates for the years prior to 1948 are available; however, reports of the county agent (14) for Iron County show that carrot production in the Cedar Valley is decreasing, and is …

Inheritance Of Certain Characters And The Linkage Relationships Of Factors On Chromosome Iv In Barley, Claude J. Jenkins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plant breeding and the development of new or better varieties of plants are essential parts of modern agronomy, horticulture and forestry. The basis for such improvement is a knowledge of the factors and principles of genetics.

A number of genetic studies have been made with barley in recent years. This is partly because of the commercial importance of the crop, and partly because of the many distinct heritable characters of barley plants. The cultivated species of barley offers the plant breeder and geneticist a wealth of material for genetic studies. Varieties differ in a great many readily distinguishable characters, species …

Actinomycetes Of Virgin Utah Soils With Special Reference To Antagonisms, Paul H. Krumperman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The importance of actinomycetes in the soils was generally overlooked until about 1913. The investigators Hiltner and Stormer and Beijerinck began systemtaic study of their occurrence and role in soil fertility. The work done by these men and others since 1913 has proved actinomycetes to occur abundantly in most soils of the world. This work done by these men and others since 1913 has proved actinomycetes to occur abundantly in most soils of the world. This work has also proved the function of these organisms to be that of decomposing highly resistant materials such as humus and complex polysaccharide compounds. …

Leafhoppers (Cicadellidae) Associated With The Stone Fruit Orchards Of Northern Utah, Mervin W. Nielson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Virus diseases of stone fruit orchards have existed in Utah for more than a quarter of a century and are seriously diminishing the peach and cherry fruit production. Western X of peach, rusty mottle of cherry, wilt and decline of cherry, and little cherry constitute the most economically important stone fruit virus diseases in Utah. Many orchards, particularly in Davis County, have 50 to 83 percent of the trees infected with one or more of the yellow-red viroses. Surveys have shown that the diseases are spreading from 3 to 5 percent each year. It is believed that certain insects are …

The Food Of Three Centrarchids And An Ameiurid In Northern Utah During 1949-50, Robert L. Eberhardt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This is a study of the food of pond fish in northern Utah. The species examined in the family Centrarchidae were largemouth black bass, Micropterus salmoides (Lacepede), green sunfish, Lepomis cyanellus Rafinesque, and common bluegill, Lepomis macrochirus Rafinesque, together with black bullhead, Ameiurus melas (Rafinesque) of the family Ameriuridae. Specifically it is a report of the macroscopic food found in the stomachs of sub-adult and mature fish. Although such a study is of predominant interest to the biologist, who is interested in life history and ecological relationships of fish, the farmer or small businessman can find the data applicable. This …

An Etiological And Host Range Study Of Celery Mosaic In Utah, Dennis H. Hall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Celery mosaic is a virus disease of major economic importance in Utah. In years of severe epiphytotics, it has been a limiting factor in celery production. In 1947 losses due to this disease were estimated to exceed 8 per cent of the total crop. This estimate does not include losses resulting from reduction in grade or from plants discarded in the packing sheds. The celery acreage in Utah dropped from a high of 950 acres in 1946 to 750 acres in 1947 and dropped again in 1948 to 420 acres. Leaders in the industry attributed this reduction in acreage, in …

Study Of Producer Marketing Of Fruits And Vegetables On The Growers' Market In Salt Lake City, Utah, John D. Baker Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Growers' Market Company in Salt Lake City was established in its present form in 1919. It developed out of the need of growers and produce dealers and has served an important function in providing a market place where buyers and sellers of fruits and vegetables can be brought together in an orderly fashion to transact business.

During the four months period of this study it was estimated that over 10,000 tons of fresh fruits and vegetables valued at about $960,000 were sold over the market platforms. This represents over 25 per cent of the requirements of fruits and vegetables …

Inheritance Of Resistance To Races Of Covered Smut, Awns, And Chaff Color In A Wheat Cross, Nazar Singh Dhesi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wheat is the most important cereal crop in the world. It is the principal staple food in Russia, United States, China, Canada, India and a number of other countries.

Covered smut is one of the most serious disease of wheat all over the world. According to Woolman and Humphrey (82) it was known from very early times and is referred to by Theoprastus and other early Greek Roman writers.

The Yield, Quality, And Nutrient Relationships Of Celery As Affected By Commercial Fertilizer, Rex L. Hurst

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Celery production has become an important factor in the economy of certain areas in Utah. In 1949 over 400 acres were harvested with an average yield of 800 crates per acre, the average return per crate being $1.80. this amounts to over half a million dollars. The crop serves as a valuable cash crop, creates a demand for hand labor, and serves as an important commercial fertilizer.

Some Factors Which May Influence Survival Of Game Farm-Reared Pheasants After Release Into The Wild, Taylor F. Cottle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was undertaken in an attempt to determine some of the factors which may influence the survival of Utah game farm-reared pheasants following their release into the wild. The survival of these birds is below the desired level after they are released, as is indicated by the low percentage taken by the sportsmen during the hunting season. In recent years the return from released game farm-reared pheasants is about 7 to 8 percent.¹ Consequently, if survival rate of these birds could be increased, more birds would be available to supplement the wild stock. Also, an increase in the …

Rodent Populations And Activities On A Moderately Grazed Mixed Prairie Near Hays, Kansas, John L. Paulk

Master's Theses or Doctor of Nursing Practice

The purpose of this investigation was to study rodent populations on a moderately grazed mixed prairie. A working knowledge of the activities of these small mammals, has satisfied to a certain degree the curiosity of the writer. So little work has been done in this plains region that the author felt the need for such an investigation, and hoped to arouse the interest of others along similar lines.

A Comparative Anatomical Study Of The Digestive Systems Of The Desert Jack Rabbit And The Pika, Dale Stanley Rupert

Theses and Dissertations

It is the purpose of this study to make gross and histological comparisons of the various segments of the intestinal tracts of the jack rabbit and the pika. The two animals used for this study were the desert jack rabbit (Lepus Californicus deserticola Mearns), and the pika (Ochotona princepts uinta Hollister). The jack rabbits were found only in the desert valleys and low foothills in the areas studied. These areas are typically open bush or sage brush types of communities. The pikas were restricted to certain high rockslides in this region. These areas are described more completely in the section …

Optimization Of Parameters For Soft-Nip Calendering Of Uncoated Paper, Jung-Kyu Yang

Paper Engineering Senior Theses

The major reason for calendering is to impart both smoothness and gloss on paper. Smoothness, which is the degree of flatness of the surface, and gloss, which is a measurement of light reflectance, are unrelated parameters. However, both smoothness and gloss are related to printing process. Strength properties affect the printing machine runability. In general, calendering reduces strength properties of the paper. The degree of finish obtained in a soft-nip calendering depends on characteristics of the paper, such as moisture content and type of filling materials. The purpose of this study is to determine the best conditions for soft-nip calender …

A Survey Of The Microflora Obtained By Flushing The Normal Bovine Uterus, Johannah Jane Wulf

Electronic Theses and Dissertations

Since artificial insemination has become a reality and the potentialities of ova transfer are being investigated by several research workers, it seems reasonable to assume that some attention should be directed toward gathering information regarding the bacterial flora of the normal bovine uterus. Both artificial insemination and ova transfer require the insertion of foreign bodies or instruments into the uterus. When such instruments enter this organ, there is always the possibility of introducing various kinds of bacteria. Very little information is available regarding the pathogenicity of these bacteria in the bovine uterus. The possibility of abortion due to such pathogenic …

Influence Of Winter Housing Conditions On Growth Rates And Feed Consumption Of Dairy Heifers, Emery H. Bartle

Electronic Theses and Dissertations

It is important in dairy cattle management to maintain steady and continuous growth of heifers and thereby secure properly developed cows which will give the production that is expected of them when they are brought into the milking herd. In general, heifer calves during the first twelve months of their growing period are carefully managed as to feed, housing and care to promote normal growth. However, they are often neglected during their yearling stage to the point where growth is retarded because of environment factors. On many dairy farms in the North Central States the management of yearling dairy heifers …

Salmonella And Paracolon Species Isolated From The Wild Brown Rat, Rattus Norvegicus, In The City Of Richmond, Virginia, John Miles Sharpley

Master's Theses

The importance of bacteria as a cause of serious intestinal diseases in man and. other animals has been recognized since the early days of the science of bacteriology. Of those forms usually associated with intestinal disturbances in man, the species considered most important are those belonging in the Salmonella group, the Paracolon group, and the Shigella group. Also, it has been known since the early part of this century that the conman rat serves as an important vector for the dissemination of infectious organisms. For example, standard textbooks list rats as primary vectors of enteric bacteria. However. there has been …