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Articles 158161 - 158190 of 159291
Full-Text Articles in Entire DC Network
An Analytic Comparative Study Of Certain Biology Textbooks Used At Secondary School Level, Joseph E. Rankin
An Analytic Comparative Study Of Certain Biology Textbooks Used At Secondary School Level, Joseph E. Rankin
Master's Theses or Doctor of Nursing Practice
Biology is the science of life and therefore deserves every consideration in the high school curriculum. The world today is making an extensive and intelligent use of biology in solving problems of personal and social significance. Scientists have discovered that certain phases of the subject are more important to man's welfare than others. For this reason it is essential that biology be presented to our high school students not as isolated facts, but in relation to the problem of living. Through this science of living things, the student can gain a healthy respect for facts and for conclusions based on …
Comparison Of Biotic Communities Of The Cedar-Hemlock And Oak-Hickory Associations, Final Version, Jane Claire Dirks-Edmunds
Comparison Of Biotic Communities Of The Cedar-Hemlock And Oak-Hickory Associations, Final Version, Jane Claire Dirks-Edmunds
Jane Claire Dirks-Edmunds Documents
A revised version of the final draft of Dr. Jane Claire Dirks-Edmunds's doctoral dissertation was published in Ecological Monographs in 1947. In her dissertation, Dirks-Edmunds compared the Douglas fir forest community on Saddleback Mountain in Oregon to an oak-hickory community in Illinois. Dirks-Edmunds, a 1937 graduate of Linfield College, graduated from the University of Illinois in 1941; she returned to teach in the Biology department at Linfield from 1941-1974.
Nebraska Bird Review (July-December 1947) 15(2), Whole Issue
Nebraska Bird Review (July-December 1947) 15(2), Whole Issue
Nebraska Bird Review
Contents
Bird Departure Dates .........Wilson Tout 1
Recent Changes in Nomenclature and Subspecific Status of Nebraska Birds .........F.W. Haecker 5
"Drumming" in the Chimney Swift .........W.E. Eigsti 9
Banding Mourning Doves in Eastern Nebraska.........Wilhelmina and Leroy Gulotta 12
Hawk Populations in Nebraska......... John H. Wampole 20
Winter Birds of the Fontenelle Forest......... Charles A. Stewart 24
Notes on the Nesting of the Acadian and Alder Flycatchers......... Frank H. Shoemaker ......... 31
N.O.U. Cooperative Bird Migration and Occurrence List for First Half of 1947......... 36
General Notes......... 40
Nebraska Bird Club News......... Adrian C. Fox......... 55
Announcements......... 60
News and Comment......... …
Medical Arts & Sciences, Volume 1, Number 2, July 1947
Medical Arts & Sciences, Volume 1, Number 2, July 1947
Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists
No abstract provided.
Cerebral Anoxia And Its Residuals: Pt. Ii. Respiration, Normal And Pathological, Cyril B. Courville
Cerebral Anoxia And Its Residuals: Pt. Ii. Respiration, Normal And Pathological, Cyril B. Courville
Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists
No abstract provided.
Riboflavin Production By Molds, George L. Peltier, Raymond Borchers
Riboflavin Production By Molds, George L. Peltier, Raymond Borchers
Papers in Microbiology
Very little information is at hand regarding the ability of molds to synthesize riboflavin. Few citations pertaining directly to riboflavin production by true molds are available.2 Pontovich (1943) found as much as 2 mg riboflavin per g of Aspergillus flavus mycelium. Tanner et at. (1945) determined the quantity of riboflavin in the submerged fermentation media of Penicillium chrysogenum. The highest value found was 1. 36 mg per ml. The primary purpose of this study was to screen several hundred isolates, recently obtained from soil, crop residues, and composts, for their ability to produce riboflavin on a wheat bran substrate.
Chincoteague: A National Wildlife Refuge, Rachel Carson
Chincoteague: A National Wildlife Refuge, Rachel Carson
United States Fish and Wildlife Service: Publications
The national wildlife refuge at Chincoteague, Virginia, is one of the newest in a chain of sanctuaries placed along the flight lanes of the waterfowl. Coming down from the north the principal links of the chain are Parker River, Montezuma, Susquehanna, Brigantine, and Bombay Hook. Then from Chincoteague the links run south, through Back Bay and Pea Island, Mattamuskeet and Cape Romain. Chincoteague, like other waterfowl refuges, is needed because birds migrate, and because in so doing they expose themselves to great dangers.
The migration of birds is one of the ancient spectacles of earth, and one of the most …
Parker River: A National Wildlife Refuge, Rachel Carson
Parker River: A National Wildlife Refuge, Rachel Carson
United States Fish and Wildlife Service: Publications
The Parker River National Wildlife Refuge is New England's most important contribution to the national effort to save the waterfowl of North America. Many million Americans have a direct stake in the success of this effort: the 2,000,00o waterfowl hunters, the millions who find recreation and esthetic pleasure in observing and photographing the birds, and all those, whom there is no way of counting, who understand the value of preserving wildlife as part of America's natural heritage.
During the several generations in which the United States has been converted from a land preeminently wild and unsettled into an industrial and …
The Density Of Matter, John D. Boon
The Density Of Matter, John D. Boon
Field and Laboratory
Density is the amount of matter in a unit volume of space. In this paper it will be expressed in grams per cubic centimeter. As a rule we think of density as being applicable to the things we deal with in everyday life, forgetting that it is an important characteristic of matter, from atomic nucleus to the stellar universe. To a great extent the behavior of matter may be explained by a knowledge of density.
Brief Short-Title List Of Published Works On The History Of Science, Samuel W. Geiser, Bessie T. Geiser
Brief Short-Title List Of Published Works On The History Of Science, Samuel W. Geiser, Bessie T. Geiser
Field and Laboratory
The present brief list was compiled primarily for the use of students in a course on the History of Science offered by the senior author at Southern Methodist University. It is far from complete: scholars conversant with the field will note omission of works they consider of primary importance, and the inclusion of others, to them of secondary interest. We are not sure that in every case our omissions and inclusions are fully defensible; but it is believed that this bibliography includes a very large proportion of the best works on the subject in hand.
Life History Studies Of The Mouse, Peromyscus Truei Nevadensis, Lowell S. Miller
Life History Studies Of The Mouse, Peromyscus Truei Nevadensis, Lowell S. Miller
Theses and Dissertations
Peromyscus truel's a fairly common inhabitant of the upper sonaranlife zone of the Western States. It is an excellent laboratory anlmal with the limitation that captivity must be accompanied by forced activlty, in order to keep the animals within the limits of normal activity. This mouse is polyestrous and breeds from early spring to late fall. Observations have shown pregnancy in late September and in early February. It is the writer's belief that ovulation in the ovary occurs only when copulation has taken lace, because corpora lutea has only been found in pregnant or lactating females. The evidence is scanty …
Hormones Of The Vertebrates And Their Influence On The Growth And Development Of Invertebrates, M. G. Heckman
Hormones Of The Vertebrates And Their Influence On The Growth And Development Of Invertebrates, M. G. Heckman
Biology Honors Papers
This 14 page thesis discusses the nature of the hormone thyroxine, the structure and physiological behavior of paramecium and describes an experiment on the effect of vertebrate hormones with various invertebrates.
Study Of Viable Seeds In Surface Soil From Various Habitats In Ellis County, Kansas, Robert D. Lippert
Study Of Viable Seeds In Surface Soil From Various Habitats In Ellis County, Kansas, Robert D. Lippert
Master's Theses or Doctor of Nursing Practice
It is the purpose of this study to determine what species of plants emerge from samples of surface soil taken from various habitats after several years of favorable growing conditions.
Pastures Of Western Kansas In Relation To Intensity Of Utilization In Past Years, Gerald W. Tomanek
Pastures Of Western Kansas In Relation To Intensity Of Utilization In Past Years, Gerald W. Tomanek
Master's Theses or Doctor of Nursing Practice
Short grass pastures vary in their ability to produce forage for livestock consumption. One of the reasons for this difference is a variation in the degree of utilization in past years. Forage production of short grass ranges has been reduced to about one-half after only a few decades of improper grazing; therefore the problem of proper utilization is becoming more important every year (Forest Service, 1936). When the settlers first came to western Kansas they found an almost complete cover of native vegetation and during the first few years only a small portion of the range land was cultivated. With …
Aspen Properties And Uses, Zigmond A. Zasada
Aspen Properties And Uses, Zigmond A. Zasada
Aspen Bibliography
Because of the large demand for lumber during the last 10 years, and particularly during the war period, aspen has entered many new fields of use. At present there is widespread interest in the possibilities of building new industries and extending the life of old ones by increased use of aspen. Many people are interested in becoming familiar with this wood. This report has been prepared to give general information on the properties and present uses of aspen and also to help in correcting some of the existing erroneous ideas about this wood.
An Adaptation Of The Feulgen Reaction For The Staining Of The Salivary Gland Chromosomes Of Drosophila, Herman C. Inlow
An Adaptation Of The Feulgen Reaction For The Staining Of The Salivary Gland Chromosomes Of Drosophila, Herman C. Inlow
Bachelors’ Theses
The discovering of the genetic value of Drosophila salivary gland chromosomes by Painter, Heitz, and Bauer in 1934 posed a problem of technique to the microtomist that is still being improved upon and widened. The staining of these chromosomes fer better study and to determine their properties, both chemical and physical, has been the object of intense research. This paper is the result of my work in connection with this subject.
A Taxonomic Study Of The Adult Mosquitoes Of Utah County With Notes On The Biology And Distribution Of The More Common Species 1946-1947, Cluff E. Hopla
A Taxonomic Study Of The Adult Mosquitoes Of Utah County With Notes On The Biology And Distribution Of The More Common Species 1946-1947, Cluff E. Hopla
Theses and Dissertations
In Utah County, information has been lacking concerning the taxonomy and distribution of mosquitoes. With the knowledge of this condition, it is felt that information can be presented which will be of value both to the scienoe of Entomology and the area concerned.
A Study Of A Heron Nesting Colony, Linden J. Leatham
A Study Of A Heron Nesting Colony, Linden J. Leatham
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Herons are well known because of their gregarious nesting habits. Like many others of the lower orders of birds they nest together in pure or mixed colonies of many different combinations and under diverse living conditions. The population of different colonies may vary from a few pairs to many thousands of pairs depending upon the nature and extent of the breeding area, the food supply available and the protection afforded either by natural or artificial means.
In Utah and adjacent areas of bordering states, many types of heron associations have been studied and reported by ornithological workers. Breeding colonies of …
A Taxonomic Study Of The Scolytidae (Coleoptera) Of The Logan Canyon Area Of Utah, Stephen L. Wood
A Taxonomic Study Of The Scolytidae (Coleoptera) Of The Logan Canyon Area Of Utah, Stephen L. Wood
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In spite of the great economic importance of north American Scolytidae, many taxonomic descriptions remain inadequate for the identification of species, and existing keys have been made obsolete by the recent description of new species. To bring these keys up to date and make them useful to students and practical foresters, detailed studies of the morphological structure of the various species are necessary. The purpose of the present investigation has been to clarify and revise existing keys and to describe briefly the species of Scolytidae occurring in the Logan Canyon area of Utah. The following keys and descriptions will be …
The Fifty-Ninth Session Of The Iowa Academy Of Science And The Fourteenth Convention Of The Junior Academy Of Science Of Iowa, April 18 And 19, 1947, Iowa Academy Of Science
The Fifty-Ninth Session Of The Iowa Academy Of Science And The Fourteenth Convention Of The Junior Academy Of Science Of Iowa, April 18 And 19, 1947, Iowa Academy Of Science
Iowa Academy of Science Documents
No abstract provided.
Kentucky Warbler (Vol. 23, No. 2), Kentucky Library Research Collections
Kentucky Warbler (Vol. 23, No. 2), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
The Circulatory Effects Of Histamine, Fred B. Moor
The Circulatory Effects Of Histamine, Fred B. Moor
Medical Arts and Sciences: A Scientific Journal of the College of Medical Evangelists
No abstract provided.
Trout Foods In Gilmore Valley Creek, Winona County, Minnesota, L. George
Trout Foods In Gilmore Valley Creek, Winona County, Minnesota, L. George
Journal of the Minnesota Academy of Science
No abstract provided.
Objectivity In Biology, Cyril E. Abbott
Objectivity In Biology, Cyril E. Abbott
Journal of the Arkansas Academy of Science
No abstract provided.
Bulletin No. 327 - Utah Agricultural Experiment Station Biennial Report, 1944-1946, R. H. Walker
Bulletin No. 327 - Utah Agricultural Experiment Station Biennial Report, 1944-1946, R. H. Walker
UAES Bulletins
During the past biennium there has been a general expansion in the research program of the Utah Agricultural Experiment Station. Although some of the investigations were curtailed by lack of personnel and equipment and the pressure of wartime assignments, many of the staff were able to devote more time to research because of a lessening of the teaching load at the College. The emergency caused a re-examination of the research program, old projects, no longer urgent were weeded out, others were revised to meet the needs of the changing times, and many new projects were initiated to extend the research …
Kentucky Warbler (Vol. 23, No. 1), Kentucky Library Research Collections
Kentucky Warbler (Vol. 23, No. 1), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
The Phorid Flies Of Guam, George E. Bohart
The Phorid Flies Of Guam, George E. Bohart
All PIRU Publications
No abstract provided.
An Arsenic Survey In Utah, George F. Knowlton, L. W. Jones, William P. Nye
An Arsenic Survey In Utah, George F. Knowlton, L. W. Jones, William P. Nye
All PIRU Publications
No abstract provided.