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On Lentodium Squamulosum, G. W. Martin Jan 1956

On Lentodium Squamulosum, G. W. Martin

Proceedings of the Iowa Academy of Science

The genus Lentodium, with its single species L. squamulosum, was established by Morgan (1895) to accommodate a fungus which had then been known for half a century. It was sent to Berkeley from Ohio by Lea in 1845 or earlier; Berkeley commented on it in that year (1845, p. 302) in the following terms: "*Lentinus tigrinus, Fr. A most remarkable state of this species has been found by Mr. Lea (n. 245) in which the gills have anastomosed, until the whole pileus and gills have become a hard, solid mass. At first sight it has quite …

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The Fluorescence Of Differentiated And Undifferentiated Plant Tissues In The Near Ultra-Violet, David A. Yos Jan 1956

The Fluorescence Of Differentiated And Undifferentiated Plant Tissues In The Near Ultra-Violet, David A. Yos

Proceedings of the Iowa Academy of Science

Luminescence phenomena have been known for perhaps as long as man has been recording history, but it has been only recently that some of these phenomena have been utilized in the study of plant tissues. Anything which can disturb the energy equilibrium within an atom of matter is at least intrinsically capable of causing that atom to emit light. As a corollary to this, any form of matter capable of absorbing energy is potentially capable of being excited to luminescence. Many biological compounds are in this category and most of them emit visible light when irradiated by invisible ultra-violet light. …

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Blood Lipids In Progressive Muscular Dystrophy, R. L. Dryer, A. R. Tammes, J. I. Routh, W. D. Paul Jan 1956

Blood Lipids In Progressive Muscular Dystrophy, R. L. Dryer, A. R. Tammes, J. I. Routh, W. D. Paul

Proceedings of the Iowa Academy of Science

Muscular dystrophy is a heredofamilial disease characterized by primary degeneration of certain groups of voluntary muscles. Although several forms of the disease are recognized clinically the basic metabolic defect is probably the same in all cases, regardless of the outward manifestations. In many instances it appears that the genetic defect is sex-linked, while in others it is not. All of the members of a given family may not show the obvious signs of disease, but if a careful study is made the non-affected members often show more or less subtle and asymptomatic defects which may be characterized as abortive forms …

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Comparison Of Manganese And Rhenium Compounds In The Catalytic Decomposition Of Potassium Chlorate, F. E. Brown, J. D. Woods Jan 1956

Comparison Of Manganese And Rhenium Compounds In The Catalytic Decomposition Of Potassium Chlorate, F. E. Brown, J. D. Woods

Proceedings of the Iowa Academy of Science

In this study several manganese catalysts, each with manganese in a different initial oxidation state, were used to decompose KCIO3 under identical conditions. Also several rhenium compounds, with rhenium in different initial oxidation states, were used to decompose KClO3 under the same conditions. Determination of the fate of the manganese and the rhenium in these reactions, and comparison of the catalytic effects of manganese and rhenium give data which help to explain the mechanism of the catalysis.

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A Comparison Of The Geometrical And Electronic Structures Of Some Styrenes, Robert J. Dolter, Bradley Winch, James Kissane, Gregor Junk, Milham Howie, Philip Mcfadden Jan 1956

A Comparison Of The Geometrical And Electronic Structures Of Some Styrenes, Robert J. Dolter, Bradley Winch, James Kissane, Gregor Junk, Milham Howie, Philip Mcfadden

Proceedings of the Iowa Academy of Science

For several years investigators in this laboratory have been interested in preparation and isolation of the pure cis-and transisomers of the beta substituted styrenes and their phenyl substituted derivatives and in the identification and elucidation of their geometrical and electronic structures.

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Property Studies Of Alaskan Silts In The Matanuska Valley, Big Delta, And Fairbanks Areas, R. W. Stump, R.L. Handy, D. T. Davidson, C.J. Roy Jan 1956

Property Studies Of Alaskan Silts In The Matanuska Valley, Big Delta, And Fairbanks Areas, R. W. Stump, R.L. Handy, D. T. Davidson, C.J. Roy

Proceedings of the Iowa Academy of Science

The study of four Alaskan areas was begun in the summer of 1954 under a program sponsored by the Office of Naval Research. The Iowa State College Engineering Experiment Station directed the study in collaboration with the Department of Geology, Iowa State College. The program was initiated to: 1. Determine the distribution of engineering soil materials m four Alaska areas. 2. Determine the engineering properties and trafficability characteristic; of these materials. 3. Determine the feasibility and best methods of stabilizing these materials for use as road and airfield building material. 4. Further the studies of geology of Alaska. 5. Attempt …

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A Massive Chert Bed In The Hopkinton Formation And An Associated Boulder Train Near Strawberry Point, Clayton County, Iowa, Sherwood D. Tuttle, Alvin J. Fuelner, Richard C. Northup Jan 1956

A Massive Chert Bed In The Hopkinton Formation And An Associated Boulder Train Near Strawberry Point, Clayton County, Iowa, Sherwood D. Tuttle, Alvin J. Fuelner, Richard C. Northup

Proceedings of the Iowa Academy of Science

Feulner, while mapping the bedrock of Clayton county during the summer of 1951, observed numerous large chert erratics scattered over the landscape west of Strawberry Point. These erratics lie near the edge of the Iowan drift plain just south of the northfacing Niagaran escarpment, which is formed by the erosion of Silurian rocks.

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Characteristics Of Some Soils Of The Iowan Till Area Of Northeast Lowa, E. M. White, F. F. Riecken Jan 1956

Characteristics Of Some Soils Of The Iowan Till Area Of Northeast Lowa, E. M. White, F. F. Riecken

Proceedings of the Iowa Academy of Science

The published county soil surveys show that Carrington loam and silt loam soils occur extensively in the CC and CKC areas of northeast Iowa outlined in Figure 1. Most of these soil surveys were made from 1914 to 1930, and as pointed out by Simonson, Riecken and Smith ( 1952), the former Carrington series in this area is now considered to consist of several series. In the present study several morphologically different profiles formerly included with the Carrington loam and silt loam soil types were sampled and certain laboratory determinations made. The data obtained and a brief discussion of their …

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Ibex Lowensis, First Evidence Of Fossil Goat In North America, Harris A. Palmer Jan 1956

Ibex Lowensis, First Evidence Of Fossil Goat In North America, Harris A. Palmer

Proceedings of the Iowa Academy of Science

One of the problems dealing with the migration of Quaternary Bovid stocks from Eurasia to North America via the Bering Straits, is the extreme fragmentary nature of the fossil record. A number of the dozen or so genera now recognized have been established on the basis of single fragmentary specimens. Many times these consist of isolated bone fragments such as horncores, partial crania, dentitions and even less diagnostic elements of the axial skeleton. As recently as 193 7 species of two genera mw to the North American continent were identified from Alaskan deposits on the basis of similar fragmentary remains …

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The Role Of Special Instructions In The Successive Performance Of Different Tasks On The Star Discrimeter, Stephanie Pisoni, Allan R. Wagner Jan 1956

The Role Of Special Instructions In The Successive Performance Of Different Tasks On The Star Discrimeter, Stephanie Pisoni, Allan R. Wagner

Proceedings of the Iowa Academy of Science

The problem was to determine the facilitating and/or interfering effects of knowledge concerning the kinds of change that might be made in shifting from a perceptual-motor task that has just been learned to a subsequent interpolated task. The experimental design called for original learning (OL), interpolated learning (IL), and relearning (RL) phases of practice, with the period for informative instructions coming between the OL and IL phases. Task A was used for OL and RL and either Task B or Task J for IL. Familiarity with the principal features of the tasks will help in explaining the problem.

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Common Elements, Fred A. Brandner Jan 1956

Common Elements, Fred A. Brandner

Proceedings of the Iowa Academy of Science

Textbooks of Statistics, in general, scarcely mention the topic "Common Elements" and almost no articles in periodicals are written on the subject. The following are the definitions that are given. These definitions are in terms of the correlation coefficient.

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Retention Of Skill On The Sam Complex Coordinator, Don Lewis, William F. Lowe Jan 1956

Retention Of Skill On The Sam Complex Coordinator, Don Lewis, William F. Lowe

Proceedings of the Iowa Academy of Science

Systematic laboratory studies of retention-retention beyond a few hours or a few days-of skill in performing complex perceptual motor tasks are in short supply. In contrast there is no shortage of anecdotal accounts of phenomenal proficiency in typing, ice skating, bicycle riding, and the like, displayed after years (and years) without practice. Largely as a consequence of anecdotes, many erudite persons (with some psychologists in the forefront among them) firmly believe that all motor skills are retained indefinitely while verbal and other symbolic materials are soon forgotten.

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First Forty Years Of The Iowa Section Of The Mathematical Society Of America; Iowa Section By-Laws, Fred Robertson Jan 1956

First Forty Years Of The Iowa Section Of The Mathematical Society Of America; Iowa Section By-Laws, Fred Robertson

Proceedings of the Iowa Academy of Science

When an organization celebrates its 40th year it is a good time to review the accomplishments and failures of the past, and to investigate ways to build for the future. Just 40 years less one week and one day the organizational meeting of "The Mathematical Association of America" was held in room 19 Memorial Hall, Drake University on April 28, 1916 in response to a call made by the general assembly of the "Iowa Academy of Science". Thus the Iowa Academy of Science may be said to sponsor the Iowa Section of the Mathematical Association of America and the ties …

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Some Observations On Regeneration In Dileptus Anser, Paul A. Meglitsch, Thomas Johnson Jan 1956

Some Observations On Regeneration In Dileptus Anser, Paul A. Meglitsch, Thomas Johnson

Proceedings of the Iowa Academy of Science

One of the most interesting capacities of protozoans is their ability to replace lost parts following injury. Although they are structurally the equivalent of cells they are functional organisms, and a study of their behavior makes it possible to bring together concepts usually applied in the cellular field with those applied in the analysis of whole organisms. The same factors that operate to evoke a particular form in the whole organism must act in a small regenerating piece of a protozoan. Whether these factors are nuclear genes or protoplasmic organization, they act rapidly in the regenerating animal, regulating the form …

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Metachromasia In The Hearts Of Human Embryos And Fetuses, E. V. Enzmann, E. A. Schillinger Jan 1956

Metachromasia In The Hearts Of Human Embryos And Fetuses, E. V. Enzmann, E. A. Schillinger

Proceedings of the Iowa Academy of Science

The matrix of certain mammalian tissues contains several types of sulfated and non-sulfated mucopolysaccharides (cf. Meyer, 1948) in addition to other carbohydrates (cf. GIegg et al, 1954), cement substance and fibrils. One of the non-sulfated mucopolysaccharides, i.e., hyaluronic acid, has been demonstrated in connective tissue, in teeth, in brain tissue, in the intervertebral discs, bovine vitreous humor, synovial fluid, the lung and other tissue. (Bairati et al, 1952; Bensley, 1950; Friedman, 1953; Holland, 1954; and others). The mucopolysccharides are depolymerized under certain conditions by specific enzymes; thus hyaluronic acid is depolymerizcd by the "spreading factor" (Duran-Reynals, 1928), the "Eizytoplasma auflosende …

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Standing Crops Of Fish In Iowa Ponds, Kenneth D. Carlander, Robert B. Moorman Jan 1956

Standing Crops Of Fish In Iowa Ponds, Kenneth D. Carlander, Robert B. Moorman

Proceedings of the Iowa Academy of Science

The fish populations of 42 Iowa ponds have been estimated for various reasons in the last 10 years by the Iowa Cooperative Fisheries Research Unit (Table 1). Although the data on some of the ponds have already been published (Fessler, 1950; Fredin, 1950; Carlander, 1951, 1952; Ruhr, 1952; Lawrence, 1952), it seems desirable to summarize the results. Most of the estimates were made by the marking and recapture technique. The pond was seined with a 50 to 70 foot seine and all fish were marked by clipping off a fin and were returned to the pond, until about one-third of …

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Adrenal Ascorbic Acid Depletion Without Eosinopenia In Hypophysectomized Rats Injected Lntrasplenically With Corticotrophin, Frederic A. Giere, W. J. Eversole Jan 1956

Adrenal Ascorbic Acid Depletion Without Eosinopenia In Hypophysectomized Rats Injected Lntrasplenically With Corticotrophin, Frederic A. Giere, W. J. Eversole

Proceedings of the Iowa Academy of Science

Several workers (Greenspan et al., 1950; Reinhardt and Li, 1951; Stack-Dunne and Young, 1951) have reported a lack of correlation between the eosinopenic, adrenal ascorbic acid lowering activity, and maintenance of adrenal weights with various adrenocorticotrophic preparations. Reinhardt et al. (1951) have critically evaluated assay methods for adrenocorticotrophic hormone (ACTH) and cautioned that differences in rate of absorption, variations in route of administration and dose-time-response relationships may influence the results obtained with different testing procedures. The study reported here was conducted under standardized conditions to determine whether the route of administration would influence the eosinopenic and adrenal ascorbic acid depleting …

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Stratification Of Iowa Artificial Lakes, Tom Moen Jan 1956

Stratification Of Iowa Artificial Lakes, Tom Moen

Proceedings of the Iowa Academy of Science

The southern half of Iowa is well supplied with artificial impoundments in the form of water supply reservoirs, industrial pits, farm ponds and State owned artificial lakes. Individually these water areas arc relatively small, but collectively they furnish several thousand acres of fishing water. One important aspect of the management of these waters has been concerned with the education of the fisherman in the values of increased harvest of pan fish. An unknown share of the success of the harvest is related to the reaction of fish to the stratification of these artificial lakes and ponds. The fisherman must be …

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Use Of Rearing Cover By Mearns Cottontail, Raymond L. Linder, George O. Hendrickson Jan 1956

Use Of Rearing Cover By Mearns Cottontail, Raymond L. Linder, George O. Hendrickson

Proceedings of the Iowa Academy of Science

Intensive research on the Mearns cottontail was conducted from March 26 to September 18, 1954, on an 80-acre tract of the Floyd Fleming farm in Decatur County, Iowa. The cover on the 80 acres was alfalfa for hay 13 acres, alfalfa in pasture 21 acres, grass in pasture 8 acres, corn 22 acres, fallow grassland 11 acres, and trees, shrubs and vines along fencelines and gullies and in a catalpa planting about 5 acres. The plants of the fallow grassland, fencelines and gullies were listed by Hubbard and Hendrickson (1952) in some detail.

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Mammalian Predation On Mussels, Richard V. Bovbjerg Jan 1956

Mammalian Predation On Mussels, Richard V. Bovbjerg

Proceedings of the Iowa Academy of Science

The remarkable reproductive potential of fresh-water mussels bears testimony to their rigorous conditions of existence. The external fertilization, and the parasitic larval phase are biological hurdles to the realization of that potential, while the settling of the immature bivalves after leaving the fish host involves the many physical risks of molar action and unsuitable substratum. Predation and disease are usual factors acting to further reduce the life expectancy of any animal but few predators are capable of utilizing adult mussels as food. Crayfish scavenge on injured or dying mussels. A snail in the stream studied, Campeloma decisum Say considered a …

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Temperature And Growth Rates In Euplotes Woodruffi Gaw, Paul A. Meglitch Jan 1956

Temperature And Growth Rates In Euplotes Woodruffi Gaw, Paul A. Meglitch

Proceedings of the Iowa Academy of Science

That temperature has a direct and significant effect upon growth of organisms is sufficiently well established, not only for Protozoa, but for other kinds of organisms. The measurement of the effect of temperature, however, is not always simple to achieve. When, in the course of setting up controls for another experiment, it became necessary to determine the capacity for growth of Euplotes woodruffi at several temperatures and pH conditions, not all of the difficulties that were actually encountered were anticipated.

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1956 Little Panther, Iowa State Teachers College High School Jan 1956

1956 Little Panther, Iowa State Teachers College High School

Malcolm Price Laboratory School Yearbooks

The student yearbook of the Teachers College High School (later the Northern University High School, part of the Malcolm Price Laboratory School of the University of Northern Iowa).

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An Investigation Of The Development Of Citizens Committees For Public Schools In The United States, James Leonard Gordon Jan 1956

An Investigation Of The Development Of Citizens Committees For Public Schools In The United States, James Leonard Gordon

Dissertations and Theses @ UNI

The problem as identified in the title of this study is just one phase of the larger, more-inclusive problem of developing and maintaining school-community relations. From the beginnings of our public school systems, the problem of effective communication between the people who are the beneficiaries of public educational services and the people who have the responsibility for performing those services has existed.

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A Study Of Office Occupations In Austin, Minnesota, Calmer Alton Jensen Jan 1956

A Study Of Office Occupations In Austin, Minnesota, Calmer Alton Jensen

Dissertations and Theses @ UNI

The study of office occupations is predicated on the belief that vocational courses and curriculum offered in modern high schools should be organized with due consideration for the needs of the workers and employers in the area in which the school is located. The researcher recognizes the fact that educational theorists differ in their philosophies relative to the value of evaluating the educational program of a school through the medium of a community study. In this study, however, the researcher has followed the philosophy of vocational education theorists who believe that a vocational program of studies should be based upon …

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The Democratic Party In The Fifty-Sixth General Assembly Of Iowa: A Study Of The Role Of A Minority Party In A One Party State, Charles Ernest Grassley Jan 1956

The Democratic Party In The Fifty-Sixth General Assembly Of Iowa: A Study Of The Role Of A Minority Party In A One Party State, Charles Ernest Grassley

Dissertations and Theses @ UNI

This writer wishes to express his sincere appreciation and gratitude· to Dr. Erma Plaehn, Chairman of his committee, for her most helpful assistance in the preparation of this thesis. Dr. Plaehn's familiarity with Iowa government was an invaluable guide. He also expresses his indebtedness to the members of the committee, Dr. George c. Robinson and Dr. Herman Nelson. This writer also wishes to express appreciation to the following legislators for their contribution to the research: Senator George 0 1Malley and Representatives Casey Loss, Jack McCoy, Lawrence Falvey, Howard Reppert, William Denman, Earl Miller, and Wayne Ballhagen. The writer is most …

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Status Study Of The Elementary School Principalship In Southwestern Iowa, Roy Keith Duncan Jan 1956

Status Study Of The Elementary School Principalship In Southwestern Iowa, Roy Keith Duncan

Dissertations and Theses @ UNI

The purpose of this study is to report the status of the elementary school principalship in the state of Iowa for the school year of 1954-1955.

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The Development Of A Reading Program In An Iowa High School, James E. Albrecht Jan 1956

The Development Of A Reading Program In An Iowa High School, James E. Albrecht

Dissertations and Theses @ UNI

The interest Americans have expressed in the art of reading perhaps stems back to their original formulation of the goals of education, when reading took its place as the first of the "3 R's." Authorities today in the field of education are still agreed that reading should be considered as basic to all forms of education. The Iowa State Course of Study in English suggests that, "Reading is the chief means of gaining an education and of continuing the education after formal schooling has ended."1

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The Use Of Lay People As A School Study Group Preceding A Permanent School-Community Organization, Gerald J. Addington Jan 1956

The Use Of Lay People As A School Study Group Preceding A Permanent School-Community Organization, Gerald J. Addington

Dissertations and Theses @ UNI

Background of the pr problem. Newcastle, Wyoming, county seat of Weston County, is located on the eastern border of the state. It is the only town in School District Number One. The school district encompasses an area of approximately three thousand square miles. In 1954 it included eleven rural elementary schools, two city elementary schools, a junior high school, and a senior high school. Newcastle has grown from a population of approximately two thousand in,1945 to five thousand in 1954. 1 During that same period the population for the district increased from nine hundred to fourteen hundred pupils. 2 This …

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The Effects Of Antibiotics Aureomycin And Terramycin On The Disease Crown Gall In Tomato Plants, Charles Raymond Anderson Jan 1956

The Effects Of Antibiotics Aureomycin And Terramycin On The Disease Crown Gall In Tomato Plants, Charles Raymond Anderson

Dissertations and Theses @ UNI

The disease crown gall manifests itself on various woody or herbaceous plants by the formation of tumor-like enlargements at the crown or on other parts or by extensive production of organs (roots, shoots). In both cases the abnormal development is an uncontrolled hyperplast, resulting in tumors or galls of varying sizes and form or in the production of organs, frequently out of normal position and in excessive numbers. Because of the frequent location of the galls on the stem or trunk near or at the ground level, the disease has been known as crown gall. Various other names such as …

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Popular Religious Ideas And Attitudes In The United States As Indicated By A Study Of Selected Recent Mass Circulation Magazines, Dorothy Paddock Auld Jan 1956

Popular Religious Ideas And Attitudes In The United States As Indicated By A Study Of Selected Recent Mass Circulation Magazines, Dorothy Paddock Auld

Dissertations and Theses @ UNI

The increase in religious activity in the United States in recent years is a phenomenon which interests many observers. Evidence of such an increase is abundant, and interpretations of the evidence are varied.

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