Life Sciences Commons^™

Handbook Of Bacteriology For High School Teachers, David Loring Fagle

Dissertations and Theses @ UNI

The study of bacteriology is frequently not included in the high school science curriculum and often, when it is taught, it is dealt with in only a superficial manner. There are various reasons for this. Very often high school science instructors lack training in courses relating to bacteriology and consequently, feel inadequate to handle the topic with their students. Another factor rests with the fact that bacteria are difficult to study without the aid or microscopes with high power objectives. Many high schools lack this equipment. A third factor is that some parents may feel that it may be dangerous …

Some Photographic Materials And Techniques For High School Biology Teachers, Robert L. Calentine

Dissertations and Theses @ UNI

Biology teachers in the smaller high schools are often confronted with the problem of securing sufficient classroom teaching material: charts, specimens, and reference books. A relatively inexpensive method of obtaining resource material would prove valuable to teachers confronted with this problem. Granting that actual study of specimens is of greater value than indirect methods, it is often helpful to have a supply of supplementary visual aids.

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.

A Study Of The Various Stages Of Corn Foliage And Their Scale Preventing Abilities In Sea Water Evaporators, Arthur J. Rehberger

Bachelors’ Theses

Previous work carried out at Marquette University has proved that seawater evaporator scale can be prevented if such things as dehydrated alfalfa foliage or dehydrated corn, oats, pea and grass foliage are added to the feed seawater.

The object of this work is to determine if the scale preventing ability of corn foliage varies with the maturity of the plant from which it is stripped. Also if the proven scale preventing ability of mature corn foliage changes while it is stored.

A Study Of Spermatogenesis In The Charales, Robert Korn

Bachelors’ Theses

Investigations on the nature of the antherozoid, or male gamete, in the Archegoniates has been of great cytological interest to numerous workers. An apparent consistency of certain characteristics in the antherozoids of the Bryophytes and the Pteridophytes has, also, undoubtably been of value in determining phylogenic relationships.

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

In 1933, Japanese workers produced liver cancer in rats by feeding o-amino-azo-toluene (cited by Rusch, et al. 1945, p.267). The carcinogenecity of the azo dyes became especially important since the incidence of these liver tumors varied profoundly with the composition of the diet in which it was given. Similar variations due to the diet had not been orbserved with the types of carcinogens. From further studies, in which known compenents were added to purified diets, both protective (anticarcinogenic) and augmenting (procarcinogenic) influences could be ascribed to individual components.

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.

Albino Mutants In The Golden Hamster, Robert J. Kinney

Bachelors’ Theses

Coat color variations or other inherent changes in the golden hamster, Mesocricetus auratus Waterhouse, have been uncommon. With a few exceptions, these animals have been remarkably uniform since 1930, when they were reared in captivity for one first time.

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 plates poured during the last two or three hours were found to be heavily contaminated with a Gram-positive, aerobic, sporeforming bacillus. Aseptic technique had been used in pouring the plates; however, external contamination was possible over the long pouring interval, so the test was repeated incubating a flask of the sterilized medium in the water …

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.

Records And New Species Of Heterosphyronid Pseudoscorpions, Don L. Torgerson

Biology ETDs

Since the description of the family Chthoniidae by Hansen in 1894, the group has been revamped considerably. Most notable of these revisions are the works of Chamberlin (1931) and Beier (1932). At the present time the family contains twenty genera and several subgenera (unpublished data, C.C. Hoff). The distribution of the family Chthoniidae is cosmopolitan.

A Preliminary Study Of The Algae Of Northwestern Minnesota, Francis Drouet

Journal of the Minnesota Academy of Science

No abstract provided.

The Distribution And Ecology Of The Terrestrial Shell-Bearing Mollusca Of Hanover, Henrico, And Chesterfield Counties, Virginia, John Bayard Burch

Master's Theses

Very little has been published concerning the molluscan fauna of Virginia, this being also true for the area under consideration. A preliminary list of the Mollusca of Hanover County was published by J.B.Burch (1952) in which twenty-five species and subspecies of land snails were reported. Several of the land Mollusca of Henrico and Chesterfield Counties were listed by P.R. Burch (1950). These included the snails Discus patulus Deshayes, Haplotrema concavum (Say), Mesodon thyroidus (Say), Stenotrema hirsutum (Say), Triodopsis Fallax (Say), and Ventridens = (zonitoides) arboreus (Say). Two additional species, Helicodiscus parallelus (Say) and Retinella indentata (Say), were reported by personal …

A Cytotaxonomic Study Of New Mexico Thelesperma, Andrew Marion Torres

Biology ETDs

This study has been an attempt to collect, to identify, and to classify the four New Mexico species of Thelesperma on the basis of morphology and chromosome number. In addition, an attempt has been made to analyze the morphology of the chromosomes with respect to their evolution.

Some Chernetid Pesudoscorpions From Mexico, Harold T. Neuberger

Biology ETDs

Included in the collection of chernetid pseudoscorpions from the American Museum of Natural History were found several individuals representing the species and records described herein as new. Much of the present material was taken from collections made by Clarence and Marie Goodnight in the central Mexico. After publication of data in the thesis, the specimens will be returned to the permanent collections of the American Museum of Natural History.

The Interrelation Of The Adrenal And Posterior Pituitary Glands In Water And Electrolyte Metabolism, Frederic A. Giere

Biology ETDs

The secretions of the adrenal medulla account for many of the instantaneous responses of the animal body to various stimuli, but it has not been established that such secretions play any significant role in the endocrine regulation of salt and water metabolism. On the other hand, it has been established that the adrenal cortex and the antidiuretic hormone of the posterior pituitary are intimately involved in such processes. Certain compounds of the amine type, among which are the adrenal medullary hormone, do have a dramatic action on water diuresis; but it is questioned whether these substances are involved in the …

Radiosensitivity Of Mice In Relation To Heightened Metabolic Activity During And Immediately Prior To Exposure To 220 Kv X-Rays, M. Rosalie Henneke

Bachelors’ Theses

The manner in which certain factors influence the susceptibility of protoplasmic systems to ionizing radiations is not as yet well understood. Of prime importance among these factors is metabolic rate; it has been demonstrated that there exists a definite re­lationship between metabolic level and the lethal effects of such radiations. At the outset it must be pointed out that there are two principal problems in this connection; that is to say, radiosensitivity can be studied in relation to metabolic rate prevailing during or subsequent to exposure. One of the most frequently used criterion of radiosusceptability is mortality rate.

Isotomine Collembola From The Sandia Mountains Of New Mexico, Harold Scott

Biology ETDs

This paper records the first study of Collembola ever made in the Sandia Mountains and one of the first ever made in New Mexico even though the state presents excellent opportunities for study of this order. The Sandia Mountains are an ecologist’s paradise and it is probable that two hundred or more species of Collembola occur in this region alone. The entire state of New Mexico, possessing the extremes of elevation and the large geographical extent necessary to produce a great diversity of habitat types, probably contains nearly twice this number.