Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network

Open Access. Powered by Scholars. Published by Universities.®

Biology

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 38881 - 38910 of 39268

Full-Text Articles in Entire DC Network

A Study Of Saponification Rates As Characteristic Of Esters, Thomas F. Mitchell Jr. Jun 1949

A Study Of Saponification Rates As Characteristic Of Esters, Thomas F. Mitchell Jr.

Bachelors’ Theses

The saponification of esters has been the subject of considerable study, and the technology of manipulation of the reaction well defined. As a result, the reaction has become a quantitative standard for ester analysis. However the comparison of the rates of this reaction with various esters as charaeteristic of them has received little consideration compared to the course of the reaction. The work of Mr. F. E. Adler on the adaptation of fat constants to waxes suggested the problem. The thesis will attempt to ascertain any significant differences in the saponification rates of various esters with regard to their characterization.


A Study Of Fleas Of Rodents In The Albuquerque, New Mexico, Area, Lelia Ann Williams May 1949

A Study Of Fleas Of Rodents In The Albuquerque, New Mexico, Area, Lelia Ann Williams

Biology ETDs

In spite of the fact that Pasturella pestis, the the etiological organism of plague, has been reported from fleas and rodents in eleven counties of New Mexico, our knowledge of the fleas of the State has remained very incomplete and extremely meager. Recognizing the marked deficiency regarding our information of the Siphonaptera of New Mexico, I began in the spring of 1948 an investigation that has resulted in adding considerable information to our knowledge of the flea population of our State.

The present study includes a report of 36 species and subspecies of fleas recovered from several nests and by …


A Bioecological Study Of Pinyon Pine-Juniper Association At Juan Tabo In The Sandia Mountains Of New Mexico, Robert Hallett Parker May 1949

A Bioecological Study Of Pinyon Pine-Juniper Association At Juan Tabo In The Sandia Mountains Of New Mexico, Robert Hallett Parker

Biology ETDs

A survey of literature shows that no community or bioecological study has ever been made of the pinyon pine-juniper association as it occurs in the Upper Sonoran Life Zone in New Mexico and southern Colorado. This deficiency of knowledge relative to the pinyon pine-juniper community is in direct contrast to several studies that have been made of the same community in Arizona and Utah by the presence of dominant trees of entirely different species. Relative to the association in New Mexico, one of the dominant tress, the pinyon pine (Pinus edulis Engelm), has been investigated, but no bioecological and …


A Study Of The Intestinal Fauna Of The Frog, Russell W. Schaedler May 1949

A Study Of The Intestinal Fauna Of The Frog, Russell W. Schaedler

Biology Honors Papers

This 23 page thesis describes experiments conducted to analyze the different types of parasites found in the digestive tracts of frogs.


Nile Blue Staining Of The Prostate Gland Of Living Mice, Herbert M. Schiller May 1949

Nile Blue Staining Of The Prostate Gland Of Living Mice, Herbert M. Schiller

Biology Honors Papers

This 36 page thesis examines the effect of Nile blue dye on the prostate of the mouse and an attempt to analyze the nature of the visible prostatic granules.


A Study Of The Flora Found In The Area Of North Bay, Ontario, Canada, Dorothy H. Post May 1949

A Study Of The Flora Found In The Area Of North Bay, Ontario, Canada, Dorothy H. Post

Biology Honors Papers

This 20 page thesis describes natural settings found in the islands of North Bay, Ontario and the technical process of collecting plant specimens in this region. A full listing of specimens collected and statistics are included.


The Determination Of Choline Esterase Activity In Whole Brains Of Developing Rats, Charles Joseph Metzler May 1949

The Determination Of Choline Esterase Activity In Whole Brains Of Developing Rats, Charles Joseph Metzler

Biology ETDs

It is the purpose of this paper to report the results of quantitative investigations of the choline esterase activity in the rat in various states of its life cycle. Some work has been done on the acetylcholine content (Welsh and Hyde, 1944) in rats of various ages, but there is no reference in the literature to complete the quantitative determinations of the choline esterase activity in the whole brain of the rat throughout its life cycle.


An Inquiry Into The Relationship Between Sulfur And Plant Growth, George E. Dillinger Jr., William F. Weber May 1949

An Inquiry Into The Relationship Between Sulfur And Plant Growth, George E. Dillinger Jr., William F. Weber

Biology Honors Papers

This 64 page thesis attempts to clarify the relationship between sulfur and plant growth.


The Future Of Biology Majors, Mary M. Keeffe Apr 1949

The Future Of Biology Majors, Mary M. Keeffe

Journal of the Minnesota Academy of Science

No abstract provided.


A Life History Study Of The Ground Squirrel Citellus Spilosoma Major (Merriam), Ferd Sumrell Mar 1949

A Life History Study Of The Ground Squirrel Citellus Spilosoma Major (Merriam), Ferd Sumrell

Biology ETDs

There has been very little investigation of this species of ground squirrel, Citellus spilosoma major (Merriam), although it is found in five States and in many localities it is the most conspicuous and most numerous rodent.


Correlation Between The Rh Factor And Landsteiner Blood Groups, Helen M. Zuelzke Mar 1949

Correlation Between The Rh Factor And Landsteiner Blood Groups, Helen M. Zuelzke

Biology ETDs

Eighty-five percent of human beings have an agglutinogen similar to that in rhesus monkeys, now called the Rh factor. This natural antibody is comparable to those which make human blood divisible into the Landsteiner groups A, B, AB, and O. This Rh factor is so called because it was first discovered in the blood of rhesus monkeys. Its importance is that it provides an explanations for previously baffling reactions to blood transfusions and the loss of babies by apparently healthy women during or shortly after pregnancy.


The Chromosomes Of The Yeast Cell, Donald William Penn Feb 1949

The Chromosomes Of The Yeast Cell, Donald William Penn

Bachelors’ Theses

Saccharomyces cerevisiae has long been a fungus of economic importance in the baking and beverage fields. A large amount of research has been done on this yeast cytologically and biochemically. However, due to its small size and difficulty in staining, the cytology of the yeast cell remains somewhat in question. Chromosomes and division figures have been demonstrated by several workers, but there still remain sharp differences of opinion as to the nature of the nucleus. Recent work on the genetics of yeast has shown evidence of chromosome division similar to that occurring in higher plants and studies of linkage have …


08 June 1949 Rio Arriba County Specimen Collection Data, W.J. Koster, K.R. Coburn Jan 1949

08 June 1949 Rio Arriba County Specimen Collection Data, W.J. Koster, K.R. Coburn

William J. Koster Field Journals

Specimen collected 08 June 1949. Original Locality: Jemez Creek (=Jemez River)1 mile above mouth of Guadalupe Creek (=Guadalupe River). Locality: Jemez River, 1.0 mile above mouth of Rio Guadalupe, Santa Fe National Forest.
Catalog number: MSB880; Taxa: Rhinichthys cataractae; Common name: longnose dace; Count of specimens: 1; Standard length:
Catalog number: MSB890; Taxa: Rhinichthys cataractae; Common name: longnose dace; Count of specimens: 12; Standard length:
Catalog number: MSB934; Taxa: Rhinichthys cataractae; Common name: longnose dace; Count of specimens: 3; Standard length:
Catalog number: MSB1629; Taxa: Gila pandora; Common name: Rio Grande chub; Count of specimens: 1; Standard length:


Trends In Dairy Production In Giles County Tennessee 1930-1945, Daly Rosten Reed Jan 1949

Trends In Dairy Production In Giles County Tennessee 1930-1945, Daly Rosten Reed

Tennessee State University Alumni Theses and Dissertations

No abstract provided.


Some Effects Of Certain Vapors On The Staining Reactions Of Paramecium Aurelia, Martha M. Allen Jan 1949

Some Effects Of Certain Vapors On The Staining Reactions Of Paramecium Aurelia, Martha M. Allen

Tennessee State University Alumni Theses and Dissertations

No abstract provided.


Agarics Of The Louisville Area : A Taxonomical Problem., Eugene H. P. Mondeau Jan 1949

Agarics Of The Louisville Area : A Taxonomical Problem., Eugene H. P. Mondeau

Electronic Theses and Dissertations

No abstract provided.


Recommended Vegetable Varieties For The Lower Rio Grande Valley Of Texas, Joseph B. Corns Dec 1948

Recommended Vegetable Varieties For The Lower Rio Grande Valley Of Texas, Joseph B. Corns

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

No abstract provided.


Distribution Of The Herpetofauna Of Kentucky., Symoine Kamin Laufe Sep 1948

Distribution Of The Herpetofauna Of Kentucky., Symoine Kamin Laufe

Electronic Theses and Dissertations

Although the herpetofauna of Kentucky is extensive and varied. it has received much less attention than that of most other states. Many herpetologists have reported on various phases of the state's amphibians and reptiles, but for the most part these reports are discrete, either pertaining to a collection, or a generic or specific study. Hence, there is no single adequate work which aptly describes the herpetology of Kentucky as a whole. When one realizes the keystone position of Kentucky in relation to northern and southern forms, the need of a zoogeographical summary of the state becomes even more apparent. Therefore, …


A Study Of The Effects Of Some Chemical And Physical Factors On Plankton In An Artificial Lake, Archie Garnett Smither Aug 1948

A Study Of The Effects Of Some Chemical And Physical Factors On Plankton In An Artificial Lake, Archie Garnett Smither

Master's Theses

It has been well established that chemical and physical factors exert a marked effect upon the plankton population in bodies of water. However, the literature reveals the fact that the same chemical and physical factors not only produce a different effect upon plankton in different bodies of water, but are not consistent in their effects upon plankton in like bodies of water. For example, Birge and Juday (1911) made a study of 150 lakes, not widely separated in distance or varying in topographic conditions. These lakes were also of the same age, yet all were individual as to the amount …


The Development Of The Megagametophyte Of Zea Mays Variety Golden Bantam Hybrid, William Richard Widner Jun 1948

The Development Of The Megagametophyte Of Zea Mays Variety Golden Bantam Hybrid, William Richard Widner

Biology ETDs

Ever since the first publication, in 1919, on megasporogenesis in Zea mays, some confusion has existed regarding the detailed sequence of certain changes in the development of the megagametophyte. The present study was made in an attempt to clarify such disputed points.


Studies Of Increment, Height-Weight, And Moisture Content Of Important Western Kansas Grasses, John Launchbaugh May 1948

Studies Of Increment, Height-Weight, And Moisture Content Of Important Western Kansas Grasses, John Launchbaugh

Master's Theses or Doctor of Nursing Practice

A logical approach to the question of how much forage is taken by livestock would be, it seems, to study first the growth habits of the important species of p:i.sture and range grasses in the areas where they are used. The purpose of this report, therefore, was to study the development of several species of perennial grasses in the mixed prairie of west-central Kamas from near the beginning of the grazing season until the grasses had reached maturity.


The Ecology Of A Pasture In The Dakota Sandstone Formation In Ellsworth County, Kansas, Byron O. Blair May 1948

The Ecology Of A Pasture In The Dakota Sandstone Formation In Ellsworth County, Kansas, Byron O. Blair

Master's Theses or Doctor of Nursing Practice

The vast area of prairie of the United States has long been known as the "feeding grounds" for herbivorous animals. In the past, the standard of living of the people of grassland regions has been measured largely by the ability of the native ranges to produce ·vegetation sufficient to maintain economical livestock production. It has become apparent that if our desired living standard is to be maintained, we must direct our efforts toward a program by the most rapid and efficient means possible, which will bring economic stability to the seventeen million acres of grassland in the Great Plains region. …


The Construction Procedure Of The Saline River Habitat Group In The Fort Hays Kansas State College Museum, William Raymond Eastman May 1948

The Construction Procedure Of The Saline River Habitat Group In The Fort Hays Kansas State College Museum, William Raymond Eastman

Master's Theses or Doctor of Nursing Practice

The development of the museum wild life habitat group in recent years has created much public interest here in the College museum many people have expressed a desire to see such a habitat group related strictly to Kansas , particularly Western Kansas . The year of such a group was not particularly expressed, but as preliminary visions developed, it seemed only reasonable that the public would enjoy a glimpse of Kansas in the days when it was making early history . Thus it was decided to design and execute a life-sized habitat depicting the ecological relationship s found between the …


Minor Elements In Plant Growth, Vangy A. Tilton May 1948

Minor Elements In Plant Growth, Vangy A. Tilton

Biology Honors Papers

This thesis describes the relationship between plants and elements found in the soil and relates an experiment with lead solutions to determine the effect of that ion on plant growth.


A Discussion Of Rodent Circulation With Special Reference To The Chinchilla, Jacqueline A. Klein May 1948

A Discussion Of Rodent Circulation With Special Reference To The Chinchilla, Jacqueline A. Klein

Biology Honors Papers

This 29 page thesis describes the attempt to prepare corrosion specimens of the entire vascular system of the chinchilla using a synthetic resin.


Study Of The Nuclear Behavior In The Basidia And Basidiospores Of Schizophyllum Commune Fries, Howard George Ehrlich May 1948

Study Of The Nuclear Behavior In The Basidia And Basidiospores Of Schizophyllum Commune Fries, Howard George Ehrlich

Bachelors’ Theses

Schizophyllum commune Fries is a member of the Hymeno­ mycetes. This genus has long intrigued mycologists because of the peculiar "spliit gills'' it characteristically possesses. For a long time, however, not much importance was attached to the fungus until it was reported from many parts or the world and its. pathogenicity as a wood-destroying agaric established. Despite these facts relatively little is known about the fungus. Perhaps the phase of development most completely described was the development of the "gills", Essig (1922). Because of the location of the hymenium and stipe attachment, Essig (1922) suggested that the fungus more properly …


Insect Pests And Predators In Relation To Alfalfa Seed Setting In Southern Alberta And The Effects On These Insects Of Three Chlorinated Hydrocarbons, Gordon A. Hobbs May 1948

Insect Pests And Predators In Relation To Alfalfa Seed Setting In Southern Alberta And The Effects On These Insects Of Three Chlorinated Hydrocarbons, Gordon A. Hobbs

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Alfalfa-insect investigations, because of necessity, had been neglected in the province of Alberta during the war years. Work was resumed on this project in the spring of 1946 by the writer.

So much progress has been made in the field of insect pest control since the advent of war-born chlorinated hydrocarbons, that it was thought advisable to design an experiment which would test under Alberta conditions the results obtained in Utah where most of this type of research had been previously carried out, and would thus serve to bring investigations in this part of Canada up to date.

It is …


A Curriculum Study Of The Biological Science Courses In The Secondary Schools And College Of Utah During 1947-48, Merrill H. Gunnell May 1948

A Curriculum Study Of The Biological Science Courses In The Secondary Schools And College Of Utah During 1947-48, Merrill H. Gunnell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

At the present time there is a feeling among biologists in Utah that there should be improvement in biological science courses and course sequence to better fill the needs of the non technical student. There are many students filling group requirements with an accumulation of courses which may not provide them with the more important fundamental concepts and principles in biology. Information concerning these courses in high schools and colleges in necessary to provide a basis for curriculum revision in the field. Such information should be useful in evaluating the present system and suggesting modifications. Because of the need for …


Rationalists In Retreat, W. E. Filmer Jan 1948

Rationalists In Retreat, W. E. Filmer

Stone-Campbell Books

No abstract provided.


Pasture Types Of Western Kansas In Relation To The Intensity Of Utilization In Past Years, Gerald W. Tomanek Jan 1948

Pasture Types Of Western Kansas In Relation To The Intensity Of Utilization In Past Years, Gerald W. Tomanek

Fort Hays Studies Series

The purpose of this study is to determine the characteristics of five pastures that have been subjected to different intensities of grazing in the past 15 years.