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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.

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.

A Taxonomic And Ecological Study Of The Ants On The Campus Of The University Of New Mexico, Tad S. Clements

Biology ETDs

This thesis attempts to indicate some of the ways in which the ants of the campus of the University of New Mexico affect man within the small area of the campus. However, my purpose of doing the study has not been strictly limited by practical considerations. Until now, no systematic study has been made of the Formicidae of the University of New Mexico Campus. Since the habitats produced artificially by man on the University of New Mexico Campus have resulted in favoring certain species of ants not found by the writer elsewhere in the region, the present study is valuable.

Respiration, Succinoxidase And D-Amino Acid Oxidase Studies On Livers From Rats Fed The Hepatic Carcinogens 4-Dimethylaminoazobenzene (Dab) And 3(1)-Methyl-4-Dimethylaminoazobenzene(3(1)-Me-Dab), Donald R. Richmond

Biology ETDs

The purpose of this investigation was:

1) to study the d-amino acid oxidase activity in the tumorous and nontumorous liver areas of animals fed different azo dyes;

2) to determine whether any decrease in enzyme activity was due to the lack of apoenzyme, its coenzyme or both;

3) to observe the effect of additional dietary riboflavin upon liver and tumor d-amino acid oxidase activity in animals bearing hepatomas in an effort to determine whether the vitamin could still be utilized in these tissues;

4) to compare succinoxidase activity in the different livers and hepatomas since this enzyme system is also …

The Minimal Nutritional Requirements Of Several Strains Of Shigella Dysenteriae 1, Roy M. Johnson

Biology ETDs

The study of bacterial nutrition is fundamental to an understanding of the physiological aspects of microorganisms. The advances made in biochemical research during the past few decades have permitted the employment of synthetic media for a large number of microorganisms previously able to grow only on complex, ill-defined media. In turn, microorganisma have become a valuable tool of the biochemist for the assay of vitamins and growth factors. These combined efforts of the biochemist and the microbiologist have advanced the entire field of physiology applicable to all organisms.

A Study Of The Pseudoscorpions Of The Mississippi River Drainage Basins, Joan Elizabeth Bolsterli

Biology ETDs

The purpose of the present study is to obtain information relative to the taxonomy, geographical distribution, and ecology of the pseudoscorpions of the Mississippi River drainage basin, with the exception of areas of headwater tributary streams. The present study is geographically restricted to the area bounded on the west by North Dakota, Kansas, and Oklahoma and on the east by Ohio, Kentucky, and Tennessee, and ranges from the Canadian border on the north to the Gulf of Mexico on the south.

Studies On The Evaluation Of The Concentration Exponent Of Benzalkonium Chloride, John P. Davanzo

Biology ETDs

In recent years many have come to believe in the exponential function of the concentration of a disinfectant to be a reliable index in evaluating the germicidial effect of that compound.

Contributions To The Gramineae Of Bernalillo County, New Mexico, James Mcdonald Rominger

Biology ETDs

An attempt has been made to collect, identify, and classify all the four tribes Agrostideae, Andropogoneae, Aveneae, and Chlorideae within the confines of Bernalillo County, New Mexico. Specimens have been examined from the herbarium of the University of New Mexico, the regional Forest Service herbarium, and the regional Soil Conservation Service herbarium, all located in Albuquerque. Species reported from Bernalillo County in these herbaria and unobserved by the author have been included in the thesis.

Relation Between Specific Ionization Of Various Radiations And Their Relative Biological Effectiveness In Mammalian Systems, John E. Furchner

Biology ETDs

The relative biological effectiveness of several radiations of differing specific ionizations was determined. The radiation effect studied was impairment of bone marrow function, and the biological test system used was the depression of Fe⁵⁹ uptake by the red blood cells of male Sprague-Dawley rats. The effectiveness of the mixed radiations in the thermal column of a homogeneous reactor was compared with 250-KVP X radiation, and the effect of the beta particles of tritium was compared with that of Co⁶⁰ gamma rays. The effect of the alpha particles of Pu and Ra on bone marrow function was also determined.

The Fern Prothallium As An Experimental Object For Morphogenetic Studies, Dorothy Anita Douglas

Theses & Honors Papers

No abstract provided.

A Cytological Study Of The Induced Octoploid Of An Agropyron-Hordeum Hybrid, R. Bruce Ashman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The occurrence of hybrids, both interspecific and intergeneric, is frequent in the Gramineae generally (Stebbins, 1949), and is especially common in the tribe Hordeae of which both A. trachycaulum and H. jubatum are members. Intergeneric hybrids in this tribe have been studied by Stebbins et al. (1946a, and 1946b), Stebbins and Walters (1949), and Stebbins and Singh (1950) in an effort to determine true phylogenetic relationships on which to base a taxonomic classification, and results of these studies have indicated that the current taxonomic treatment of this tribe is highly artificial. Attempts to produce a perennial wheat and improve …

Notes On Some Leeches (Hirudinea) From The Yukon Territory, Canada, And Alaska, M. M. Keith

Journal of the Minnesota Academy of Science

No abstract provided.

A Limnological Study Of A Farm Pond In Piedmont Virginia, Herbert Hindle Goodman

Theses & Honors Papers

No abstract provided.

Succession In A Dune Community At Mentor Headlands, Ohio, Harold G. Marshall

Biological Sciences Faculty Publications

Continual sand deposition on the Lake Erie shore, adjacent to the mouth of the Grand River, has led to the formation of a developing sand dune community and through the years a successional pattern of plant growth. An analysis was made of the general plant composition of the area by means of four transects directed from the bare beach inland. Definite zonation of specific plant species was present throughout the community in parallel formation. Named for the dominant plant types they contained, the major stages were: dune grass, poplar, aspen, and oak.

Measurement Of Residual Lung Capacities And Ventilatory Efficiency By The Nitrogen Clearance Method, Elizabeth Roorbach

Biology ETDs

Essential to an understanding of the behavior of the lung is a knowledge of its total gas capacity and those fractions of it which are utilized in the process of normal breathing. Only when these volumes are known, it is possible to make an appraisal of the efficiency of the pulmonary ventilation in maintaining physiologically adequate levels of oxygen and carbon dioxide in the alveolar spaces with a minimum of ventilatory effort.

A Study Of An Unusually Heat Resistant Variant Of Bacilius Circulans, Roberta D. Demaret

Biology ETDs

The problem herein described was initiated while following the growth rate of a culture over a ten-hour period. A flask of polypeptone agar had been held in a 47-degree Celsius water bath to maintain it melted so that the plates could be poured periodically.

The Nutritional Requirements Of A Strain Of Shigella Dysenteriae 1, Carl G. Mays

Biology ETDs

It was the purpose of this investigation to develop [a synthetic] medium for the growth of Shigella dysenteriae 1, strain 14-1, originally obtained from the collection at the Army Medical Service Graduate School. Not only was it desirable to grow the cells, but also to grow them in large quantities in the least possible time. Although considerable work has been done in determining the various growth essentials for many of the Shigella group, particularly the Flexner strains of Shigella paradysenteriae, comparatively little has be ascertained regarding those strains included in Shigella dysenteriae.

Protein Metabolism In Rats With Tumors Of The Liver, Chester R. Richmond

Biology ETDs

The purpose of our study was to determine possible alteration in water, fat, and protein content of the livers from rats fed DAB for long periods. Aliquots were used for the protein determinations.

Microscopic Alterations In Endocrine Glands And Other Organs Of Rats Fed The Hepatic Carcinogen P-Dimethylaminoazobenzene, Fenton C. Kelley

Biology ETDs

It was the purpose of this investigation to determine whether the feeding of DAB, in addition to inducing liver tumors, alters the microscopic structure of the endocrine system. In addition, a study was made of certain adrenal cortical hormones as possible modifiers of the carcinogenic effects of DAB.