Life Sciences Commons^™

The Gross And Microscopic Morphology Of The Digestive System Of The Cutlips Minnow, Exoglossum Maxillingua (Le Sueur), Ira Lederman

Biology Honors Papers

This 18 page thesis describes taxonomy and anatomical characteristics of the minnow, including geographical distribution, ecology and feeding habits.

The Phytoplankton Of The Logan River, Utah, A Mountain Stream, William J. Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The voluminous limnological literature contains few studies of mountain streams. Though there are a few papers on the benthic algae (see Budde 1928, Raabe 1951) only Pennak (1943) reports year-round quantitative data on the phytoplankton. Brinley (1950) gives some phytoplankton information in a summer study of streams in Rocky Mountain National Park.

An Ecological Study Of The Bottom Fauna Of Bear Lake Idaho And Utah, Earl W. Smart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In evaluating the potential ability of a lake to produce fish, probably no single standard is so important as an estimate of the amount of bottom fauna (Deevey and Bishop, 1942).

The study of the bottom fauna of Bear Lake was a part of the investigation of its limnology and fisheries, begun in 1952. This study was sponsored through federal monies made available through the Dingle-Johnson Act. The primary purpose of the study was to examine all the evidence in estimating the fish producing capacity of the lake. Bear Lake is the second largest fresh water lake in Utah but …

The Effect Of Adrenalectomy And Cortisone Acetate On Experimental Liver Cancer, Richard A. Heise

Biology ETDs

An attempt was made in this study to determine the completeness of adrenalectomy and effect in conjunction with cortisone acetate and/or desoxycorticosterone trimethylacetate (DCT) on the development of liver tumors in rats fed 3'-methyl-4-dimethylaminoazobenzene (3'-Me-DAB)

The Effects Of Adrenal Steroids On Electrolyte And Water Balance In Force-Fed Intact Rats, Emma Romero

Biology ETDs

During the past decade a number of biological and clinical investigations have been concerned with the inhibitory effects of 11-oxy and 17-hydroxy steroids on water and sodium excretion. However, it is recognized by many investigators that such steroids may act either to inhibit or enhance water and sodium excretion, the results obtained depending upon experimental circumstances.

A Survey Of Serum Enzymes As A Possible Index Of Radiation Injury, Lora Belle Hughes

Biology ETDs

Early changes in the serum concentrations of glutamic-oxalacetic transaminase, glutamic-pyruvic transaminase, lactic dehydrogenase, and malic dehydrogenase were determined in young adult rats following exposures to sublethal, midlethal, and supralethal doses of X-irradiation, treatment with hepatotoxic agents or opiates, and sequential administration of both X-irradiation and the hepatotoxins. Changes in serum enzyme content were also determined in a series of 38 rhesus monkeys within 30 minutes after exposure to sublethal doses of fission neutrons.

Relatively small increases in serum enzyme concentration, detectable within 1 to 6 hours after whole body X-irradiation, were greatly exaggerated by prior treatment of the test animals …

A Comparison Of The Blood Oxygen Capacity In Semi-Terrestrial And Aquatic Frogs, Francis Burke Leftwich

Master's Theses

The present investigation is a comparison of the blood oxygen capacity in three species of frogs: a semi-terrestrial form R. pippins, the meadow frog; and two aquatic forms, R. clamitans, the green frog; and R. catesbeiana, the bullfrog. The habitats or these frogs are described by Wright and Wright (1949) as follows: R. pipiens inhabits swampy marsh lands, upland backwaters, overflows, and ponds in the spring. In summer it is found in swamp lands, grassy woodlands, or in cultivated hay and grain fields. In winter it hibernates in pools or marshes. It has been found as far as …

A Comparison Of The Blood Oxygen Capacity In Painted Turtles (Chrysemys Picta Schneider) And Box Turtles (Terrapene Carolina Linne), Harold J. Payne

Master's Theses

Among factors necessary for an animal to maintain life is the presence of an oxygen carrier that will transport a sufficient quantity of oxygen necessary for respiratory metabolism. In animals whose blood contains hemoglobin, which is a pigment that loads and unloads oxygen, this carrying capacity is referred to as blood oxygen capacity. It is a measure of the amount of oxygen that will combine with whole blood when completely mixed with air. It is usually expressed in volumes per cent (ml. 02/100 ml. blood) and corrected to standard temperature and pressure.

A search of available literature revealed that there …

Studies On The Periodicity Of Certain Plankton Species Of Salem Lake, Gene A. Pratt

Theses and Dissertations

Plankton samples were taken periodically from one station in Salem Lake from the fall of 1955 through the winter of 1957. Other data including the pH, dissolved oxygen content, turbidity, brightness of day, temperature, and time of day were recorded at the time of each collection. The plankton samples were centrifuged and preserved in a 4% formalin solution. They were later examined microscopically, and density, percent density, and percent frequency calculations were made from them for ten selected species and for the five phyla which they represent.

The Effects Of Desoxycorticosterone Trimethylacetate, Desoxycorticosterone Acetate, Cortisone Acetate, And Adrenalectomy On The Liver Succinoxidase And Glutamic Dehydrogenase Activity Of Rats Fed 3'-Methyl-4-Dimethylaminoazobenzene (3'-Me-Dab), John P. Davanzo

Biology ETDs

Experimental production of liver cancer by means of azo dyes is a standardized and convenient method for study of the cancer problem. The rat is the animal of choice for this type of experimentation because this animal is readily susceptible to liver carcinogenesis upon being fed azo dyes. Mice are only partially susceptible and rabbits and guinea pigs will not develop cancer of the liver by ingestion of the azo dyes (E. C. Miller and J. A. Miller, 1947, p.473). The liver, likewise, is an appropriate organ for study. Enzymologists and cytologists today regard the liver cell as the best …

The Collembola Of New Mexico With Especial Reference To The North-Central Part Of The State, Harold George Scott

Biology ETDs

The is one of the first faunistic studies to be completed in New Mexico and one of the first comprehensive analyses of the ecological distribution of the species of Collembola in as large and varied an area as New Mexico. One hundred fifty-two Collembola species, of which 24 are described as new, are recorded from New Mexico. In addition four species, of which one is described as new, are recorded for the first time from Colorado. Prior to the present study, only four species of Collembola were recorded from New Mexico.

Distribution Of The Mammals Of The Sandia And Manzano Mountains, New Mexico, Ronald R. Clothier

Biology ETDs

The Sandia and Manzano Mountain area is divided into communities based mainly on the major types of vegetation present. These communities and their relationships to biotic provinces, life zones, and habitats are described in the section that deals with the description of the area. Several collecting sites were established in each of these communities, and an effort was made to set traps in all available types of mammal habitats.

Preliminary Experiments On The Possibility Of Inducing An Abdominal Pregnancy In The Adult Male Golden Hamster By The Transplantation Of Presumptive Embryonic Tissue From The Female, Richard T. Padula

Biology Honors Papers

This 21 page thesis describes an experiment conducted to determine whether ectopic pregnancy can be induced in a male hamster through transplantation of a fertilized egg from a female hamster.

The Effects Of Adrenal Steroids On Electrolyte And Water Balance In Force-Fed Adrenalectomized Rats, Rodney T. Houlihan

Biology ETDs

The literature dealing with various aspects of adrenal cortical function is so voluminous that any review is necessarily incomplete, both with respect to topics treated and references cited. In this paper discussion is restricted to certain features of cortex function, namely the effects on water and electrolyte balance and weight maintenance.

An Historical And Experimental Account Of Geotropism, Nancy Redd Quarles

Theses & Honors Papers

The fact that shoots grow upwards and roots grow downwards is common knowledge. These recognized tendencies are called "geotropic reactions". We apply the term, "positive geotropism" to the tendency of roots growing downwards; meaning that they respond in a positive manner to the pull of gravity. To the response of shoots we apply the term, "negative geotropism", which signifies that their growth is away from the pull of gravity.

The response of plants to external forces such as gravity has long been a subject of research. Many theories have been advanced attempting to explain the basic principles involved in the …

Ecosystem Studies At Cedar Creek Natural History Area, Donald B. Lawrence, J. Roger Bray, L. C. Pearson

Journal of the Minnesota Academy of Science

No abstract provided.

A Report On Fossil Bison From A Peat Bog In St. Paul, Minnesota, Philip S. Taylor

Journal of the Minnesota Academy of Science

No abstract provided.

Some Factors Affecting The Utilization Of Space By Mice Of The Genus Peromyscus, Howard D. Orr

Journal of the Minnesota Academy of Science

No abstract provided.

Notes On Diurnal Movement, Of Minnows In Shallow Waters Of A Bog Lake In North Central Minnesota, Arthur R. Peterson

Journal of the Minnesota Academy of Science

No abstract provided.

A Critical Study Of The Chromosomes In Two Species Of Myxophyceae, John Thomas Mullins

Master's Theses

The Myxophyoeae or blue-green algae have been frequent subjects for cytological investigation since Schmitz (1879) first called attention to two regions in the protoplast. Since that publication the morphological and chemical nature of the genetic material and the mechanism of cell division in the Myxophyceae has been a controversial subject, The evidence that has been presented is, tor the most part, more voluminous than enlightening.

This investigation was undertaken in order to verify the methods and check the results obtained with the smear technique by Strickland (1948). Additional methods were also applied which might enable a more critical evaluation of …

The Value Of Including Chemistry Content In The Study Of High School Biology, Ramon Duane Buckley

Dissertations and Theses @ UNI

The purpose was to evaluate the effect of including some definite chemistry content in high school biology. This evaluation was made by comparing outcomes of instruction in two different groups of a high school biology course. The two groups were equated in terms of the intelligence quotients, the sex, and the previous achievement in biology of the class members. The comparative gains in factual knowledge were measured by means of an evaluation test. The comparative gains in appreciations and interests in biology were measured with a questionnaire.

Studies On The Trematode Larva Neascus, Thomas Reyes

University of the Pacific Theses and Dissertations

During the spring semesters of 1955 and 1956, while the writer was under the supervision of Dr. A. E. Noble, a preliminary survey was initiated on parasites in local fishes, amphibians, and reptiles occurring in the vicinity of Stockton, California. The collection of specimens in this survey included sixteen green sunfish, Lepomis cyanella, and two bluegills, L. macrochirus. Larval trematodes recovered from the heart and liver of these specimens belonged to the family Diplostomatidae Poirier (1886) which is characterized by a conspicuous constriction separating the fore and hind-bodies. The leaf-like forebody with the lateral borders converging ventrally to form a …

Distribution And Taxonomy Of The Pocket Gopher Thomomys Bottae In Bernalillo County, New Mexico, James Lester Sands

Biology ETDs

The purpose of this study are to determine what kinds of pocket gophers of the genus Thomomys occur in Bernalillo County, New Mexico, and to reveal the relationship between the pocket gophers occupying the Sandia Mountains and those occurring in the valley of the Rio Grande.

The Comparative Morphology Of The Central Nervous System Of The Larva, Pupa, And Adult Of Epilachnia Corrupta, Raymond F. Moore

Master's Theses

The nervous system of insects has been subject of much study and research. By far the greatest part of this work has been on the orders of Orthopters, Lepidopters, Hymenopters, Diptera, and Coleoptera. This has been limited, in most cases, to a particular stage in the life history of the insect. This paper looks to study the morphology of the central nervous system of Epilachnia corrupta through all its stages in its life cycle.

The Effect Of Adrenal Steroid Hormones On The Protein Content Of Tumorous Livers, Duncan W. Martin

Biology ETDs

Protein is basic to the structure and function of protoplasm. Enzyme systems which regulate the rate of cellular reactions are primarily composed of protein and many of these enzymatic systems influence the metabolism of less specialized proteins that form the major structural material of protoplasm. It is believed that experimental procedures which modify protein composition of cells may also influence the activity of intra-cellular enzymes. In experimental live cancer, it has been shown that the activities of a number of oxidative enzymes are modified as the carcinogenic process proceeds (Richmond, 1955, p.38). Furthermore, it has been demonstrated that endocrine function …

Technique For Demonstrating The Chromosomes In The Salivary Glands Of The Fruit Fly, Drosophila Melanogaster, M. M. Keith

Journal of the Minnesota Academy of Science

No abstract provided.

Observations On The Morphology, Physiology, And Life History Of Allescheria Boydii Shear, Robert Denton Flory

Master's Theses

Of those organisms upon the face of the earth displaying a wide range of variability, excellent examples may be found amoung certain groups of the fungi. This extreme variation as noted in certain fungal groups becomes even more interesting when the phenomenon of sexuality is eliminated or of rare occur­rence as in many of the Fungi Imperfecti. Such extreme varia­tions occur in Allescheria Boydii, whose historical background is as interesting as the growth of the fungus itself.

In 1909 Tarozzi (46)isolated a fungus organism as the causative agent in a Sardinian case of mycetoma. Tarozzi referred this fungus to Saccardo, …

A Study Of Four Species Of The Pseudoscorpion Genus Megachernes, Dwain W. Parrack

Biology ETDs

Purpose.-- The Purpose of this study is to present descriptions of three new species of the pseudoscorpion genus Megachernes, to redescribe the female of M. papuanus Beier, and to describe for the first time the male of that species.

Flight Activities Of The Ant Dolichoderus (Hypoclinea) Mariae Forel, Mary Talbot

Faculty Scholarship

Often some reference is made to the "flight" of a .species of ants as if all the males and females left the colony .on one day. W. M. Wheeler, in his 1905 account of the genus Dolichoderus, said .o D. mariae" "August 20 is approximately the date of the nuptial flight oi this species." Today it is generally understood that there are usually a number oi flights. This study shows that D. mariae is conspicuous in this respect.

The Comparative Osteology Of The Trunk Skeleton Of Five Year Classes Of The Golden Shiner, Notemigonus Crysoleucas (Mitchell), Aaron Hathaway O'Bier

Master's Theses

The golden shiner, Notemigonus crysoleucaa, forms a monotypic species in the fish family, Cyprinidae. It is a medium-sized minnow which inhabits ponds and sluggish freshwater streams in North America from latitude; 30°N. to 50°N. In the south its range is restricted to the area east of the Appalachian Mountains. The northern and western part of the range extends to Wyoming and south to the drainages of the Arkansas and upper Ohio Rivers.