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Porcellio Quadriseriatus (Isopoda) At Dallas, Texas, S. W. Geiser

Field and Laboratory

The eastern Mediterranean species, Porcellio (Proporcellio) quadriseriatus Verh. (which for some years has been locally very abundant near Southern Methodist University at Dallas), was first found in the summer and fall of 1925 in a rubbish- and stone dump on a corner of the campus.

Ocular Asymmetry In Certain Texas Isopods, S. W. Geiser

Field and Laboratory

cente parce glandulosa; corolla 2.2-3 cm. longa; nuculis glabris 4 mm.

Geographic Variation In Toads Of The Debilis Group Of Bufo, Ottys Sanders, Hobart M. Smith

Field and Laboratory

In 1938, Taylor (1938,513) for the first time pointed out the existence of two distinct forms of toads in the assemblage previously referred to Bufo debilis. These he designated as the species Bufo insidior Girard and Bufo debilis Girard. Since then much confusion has reigned, especially with respect to the range and status of the southeasterly form regarded as B. debilis.

Phenotypic Variations Of Erigeron Strigosus Muhl. (Compositae) In Eastern Texas, Robert L. Van Vleet

Field and Laboratory

In Texas, Erigeron strigosus Muhl. shows great variation, having: (1) spring forms which frequently resemble E. tenuis T.&G. and which have strigose, usually scanty pubescence; (2) taller summer forms with dense, predominantly spreading pubescence; and (3) autumn forms of tall plants having conspicuous basal rosettes.

Vitis Mustangensis Buckley Var. Diversa (L. H. Bailey) Shinners, Comb. Nov., Lloyd H. Shinners

Field and Laboratory

longis.

Yucca Freemanii, A New Species From Northeastern Texas, Lloyd H. Shinners

Field and Laboratory

caule glabro 25-55 cm. alto, foliis anguste oblongis vel oblongo-oblanceolatis

A Study Of The Correlation Of Acid Production And Population Growth In Escherichia Coli, Proteus Morgani And Shigella Sonnei, Lolita R. Fritz

Biology ETDs

During the course of growth in a bacterial culture, cellular development and reproduction take place in a regular and orderly manner. It is possible to observe definite phases in the normal growth of a culture. Some method of evaluation of the growth must be used in order to determine the population change or the effect of chemical and physical environment on bacterial cells. Numerous methods have been tried, employing the total population number or rate of production is used in this investigation as an indication of population growth of Escherichia coli, Proteus morgani and Shigella sonnei.

There has …

Some Studies On The Consortes Of The Norway Rat In Utah County, Utah, Roy J. Myklebust

Theses and Dissertations

This study of the Norway rat, Rattus norvegicus (Erxleben) and its consortes was undertaken in Utah County to determine : (1} the frequency of infection of Trichinella spiralis (Owen) Railliet, the causative organism of trichinosis in humans, (2) the populations of fleas, lice and mites on the rat, and (3) the occurence of other consortes. This study covered a period from January 1951 through June, 1951. Additional records were made available from studies being made by the Department of Zoology and Entomology, Brigham Young University on parasitic arthropods (listed as Project Ten). The species ot fleas, and those mites which …

A Graphic Résumé Of The Pleistocene Of Nebraska (With Notes On The Fossil Mammalian Remains), C. Bertrand Schultz, Gilbert C. Lueninghoener, W. D. Frankforter

Bulletin of the University of Nebraska State Museum (1924–2023)

I T SEEMS desirable at this time to present a graphic resume of the Nebraska Pleistocene, together with a summary of the stratigraphic sequences of the fossil vertebrates. This report is based on data taken from various publications' in addition to information gathered by the present writers during the past fifteen or more field seasons. Intensive work has been done in the past five years in connection with recovery of paleontological material in the areas where government dams are under construction (Schultz, Lueninghoener, and Frankforter, 1948; Schultz and Frankforter, 1948; Holder and Wike, 1949). The information in the present paper …

A Method For The Determination Of Adrenaline In The Presence Of Mono And Dihydroxy Compounds, Glenn H. Steinback

Biology ETDs

Although the adrenal glands have long been known anatomically, any clue to their probable function remained hidden until the nineteenth century. According to Best and Taylor (1949) Eustachius described the adrenal glands in his book entitled “De Glandulis Quae Renibus Incumbent” as early as 1563.

The Role Of Environmental Factors In The Metamorphosis Of Ambystoma Tigrinum Mavortium Baird, John Roberts

Biology ETDs

The problem presented by this paper are directly concerned with the environmental factors influencing metamorphosis in Ambystoma tigrinum, and since the thyroid and pituitary glands are important in amphibian metamorphosis a brief account of experiments relating to metamorphosis is given here.

Physiographic Influences Of The Edwards Plateau On Its Endemic Amphibian Fauna-A Résumé, Lawrence Curtis

Field and Laboratory

It has long been known that the geographic ranges of certain plants and animals not only closely parallel each other, but also the physiography of their habitat. Indeed, plants and animals seem often to follow clearly certain intangible lines, in their distribution.

The Saponification Of Esters, Robert Delong Sullivan

Bachelors’ Theses

The kinetics of chemical reactions has always been a very intriguing subject. It is the tool by which the mechanisms of chemical reactions are elucidated. Upon it partly rate the advisability of utilization of a particular reaction for industrial purposes. From it the field or catalysis has sprung. Chemical kinetics. is concerned with all branches of chemistry. Conversely, all branches of chemistry have an interest in it.

This thesis will attempt to do two things. First, the order, specific rate constant, and the energy of activation will be determined from the saponification of several esters. second, the introduction will cover, …

Ecology Of Passerine Birds Wintering At Utah Lake, Joseph R. Murphy

Theses and Dissertations

During the period of October to April of the winter of 1950-51, an ecological study was undertaken of a population or passerine birds wintering in a segment of the Utah Lake Shore. Available winter weather data indicated that although such factors as precipitation, temperature, and wind may often be severe, they are not critical enough to prevent a fairly large population of passerine birds from spending the winter months in the study locale. Five fairly distinct plant communities can be recognized in the area. There is evidence which indicates that certain passerine bird species are especially dependent on a particular …

A Preliminary Study Of The Distribution Of Fleas In Utah Known To Be Capable And Potential Vectors Of Plague, Dorald M. Allred

Theses and Dissertations

Plague outbreaks in the past have been disastrous where domestic rats and their fleas of certain species were common. Plague has been known to occur in most parts of the world (Robertson 1923), and has occurred as human epidemics for many centuries (Dubos 1948).

The In Vitro Determination Of Human Blood Oxygen Saturation In The Presence Of High Concentrations Of Carbon Dioxide, Elizabeth D. Armstrong

Biology ETDs

Mayow’s work in 1673 is cited by Landois (1905) as the first demonstration of the liberation of gases from blood in a vacuum. In 1863 Meyer, Ludwig, and Pfleuger established that the oxygen leaving the lung was transported in a combined form with hemoglobin and that the oxygen was released into the tissues accompanied by a change in color of the blood.

Induced Neoteny In Ambystoma Tigrinum Mavortium Baird I. Treatment With Non-Hypophyseal Hormones, John E. Furchner

Biology ETDs

Metamorphosis in amphibia has been the subject of many investigations, not only because the phenomenon is a manifestation of growth and differentiation, but also because of the close relationship between metamorphosis and the thyroid gland.

The Development Of The Scholander Micro-Respirometer For Use In The Study Of Metabolism In Bacterical Endospores, Phillip G. Crook

Biology ETDs

In this paper, the Scholander micro-respirometer has been adapted, and techniques worked out, to permit its use in attacking the problems associated with endospore respiration.

Colorimetry And Its Application To Analytical Methods, William L. Walls

Biology Honors Papers

This 46 page thesis discusses the theory and history of colorimetry and describes colorimetric analysis of organic and inorganic constituents of the human body and a few of the lower vertebrates.

A Special Respiratory Mechanism In The Adrenal Gland Of Cattle, Martin Roeder

Biology ETDs

The first definite evidence for the existence of an enzyme which catalyzes the biological oxidation of phenols was presented was presented in 1896 by Bourquelot and Bertrand. By 1902 the latter had characterized the enzyme as acting directly on the amino acid tyrosine, and had demonstrated its action against other substances, including p-hydroxyphenylethylamine, p-cresol, and phenol.

The Life Cycle Of The Ostracod Cypricercus Reticulatus (Zaddach, 1844) Sars, 1928, Louise E. Goeke

Biology ETDs

The purpose of the present study is to describe the stages in the life-cycle of the fresh-water ostracod, Cypricercus reticulatus (Zaddach,1844) Sars, 1928 of the family Cypridae. This particular species was chosen primarily because of availability. The selection of this species was fortunate since C. reticulatus was found to be easily adapted to laboratory conditions. In addition, the form was a fortunate selection because the period of time required for reproduction is relatively brief and the species reproduces parthenogenetically, thus eliminating difficulties incident to impregnation of the females.

Bulletin No. 347 - The Life History And Management Of The Mountain Whitefish Prosopium Williamsoni (Girard) In Logan River Utah, William F. Sigler

UAES Bulletins

In 1948 a comprehensive fishery investigation on Logan River was initiated by the Department of Wildlife Management, Utah State Agricultural College, and the Utah Cooperative Wildlife Research Unit. Three masters' theses have been completed on life histories and populations to date (Thoreson, 1949; Fleener, 1950; Pechacek, 1950). One phase of this investigation is a study of the mountain whitefish Prosopium williamsoni (Girard).

The Effects Of Intraperitoneal Injections Of Methylene Blue On Sarcoma 37 In Mice, Jennifer Sullivan

Student Scholarship

This research investigates the quantitative effects of methylene blue on the growth of transplanted sarcoma 37 in Swiss mice. While some previous literature suggested that oral administration of this thiazine dye could inhibit certain carcinomas, this study focuses on the results of direct intraperitoneal injections. The experimental process involved injecting mice with varying concentrations of the dye and allowing a nine-day growth period before removing the tumors for microscopic analysis. The primary metric for determining growth effects was the mitotic count, which involved averaging the number of dividing cells across multiple sections and fields for each tumor. 

The results indicate …

Life History Of The Utah Sculpin Cottus Bairdi Semiscaber (Cope) In Logan River, Utah, William M. Zarbook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of the Utah sculpin in Logan River was based on 801 specimens collected during 1949 to March 1951. Numbers of fish examined for various catagories of the study wares length-frequency, 495; aging by vertebrae, 407; length-weight relationship, 601; and food habits, 275.

Fish were collected by use of an electric shocking machine generating 600 watts and 220 volts. Numbers of fish occurred as high as 150 per tenth mile of stream. Preferred habitats occurred in areas of coarse gravel and small rocks.

Vertebrae dissected from the fish were used in age determination. Length-frequency proved to be a general …

Soil Nitrate, Total Nitrogen And Organic Matter In Relation To Dry-Farming, Krishnappa Ramaiah

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Dry farming has been defined as production of useful crops, without irrigation, on lands that receive an annual precipitation of 20 inches or less. In some regions the term dry farming is applied to farming without irrigation under annual precipitation of 30 inches or less. Although there is no sharp demarkation between dry farming and humid farming, the term dry farming always means farming under difficulties due to limited annual rainfall.

An Ecological Study Of The Utah Sculpin Cottus Bairdi Semiscaber In Logan River, Utah, William Merle Zarbock

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of the Utah sculpin Cottus bairdi semiscaber, or Rocky Mountain bullhead as it is known locally on Logan River, Utah, is primarily one of determining its relation to game fish. Field work for this study began in 1949 and continued to March of 1951. Numbers of the Utah sculpin on Logan River have been estimated to be as high as 150 per tenth mile of stream. The larger populations are in the area of the third impoundment on Logan River and downstream.

Age And Growth Of The Brown Trout Salmo Trutta Fario Linnaeus In Logan River, Utah, William Sigler

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Logan River flowing southwesterly through the mountains of Cache County, Utah is comparatively cold to the mouth of Logan Canyon. The stream is characterized by steep gradient, a high velocity and relatively few pools. A total of 1053 brown trout were examined during the course of this study; 286 were retained for age and growth determinations. The body-scale relationship is L = 40.46 mm. + 0.44185R + 0.01908R² where L equals standard length in millimeters, and R equals scale radius times 80. The relationship of standard length to weight is described by the formula W = 0.000022 L …

Inheritance Of 16 Barley Characters And Their Linkage Relationships, Tejpal Singh Gill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The assignment of genetic factors to definite loci in the hereditary mechanism has been a great step in the progress of biology. Of the cereal crops, barley (Hordeum sp.), a crop of economic importance, offers a superior opportunity for genetic studies. Its adaptation to wide varieties of conditions, with a wealth of easily differentiated characters and only seven pairs of chromosomes, the barley plant provides excellent material for linkage studies.

Although there is a vast amount of literature dealing with inheritance in barley, yet knowledge of the subject is still very limited. The mode of inheritance of about one hundred …

Fertilizer Trials On Dryland Winter Wheat, I. G. Sampson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wheat is one of the major crops of Utah and for more than 50 years farmers have been raising wheat on the dry lands of the state. The system they use is known as the alternate cropping or crop-follow system and consists of one year of crop alternating with one year of clean cultivation known as fallow.

Wheat removes a considerable amount of the natural plant food elements from the soil each year. This is especially true of nitrogen. According to Bracken and Greaves (9) the original low supply of nitrogen in most Utah soils together with the depleting effects …

The Food Of Pond Fish In Northern Utah, Robert L. Eberhardt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A series of ponds in northern Utah supplied mainly by artesian water was poisoned with rotenone during 1949-50. Four hundred and seventy-three fish were obtained for a food habits study, and of these fish, 423, or 89 percent, had food in their stomachs. The species studied were largemouth bass, green sunfish, common bluegill, and black bullhead. Largemouth bass had the widest variety of diet throughout the year but also had the highest percentage of empty stomachs. Green sunfish and black bullhead had the least diverse food habits. Twenty-nine different food items were recorded; those used most commonly were green sunfish, …