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Application Of Clay Crystallite-Size In Soil Genesis Studies, R. W. Arnold

Proceedings of the Iowa Academy of Science

Many soils have clay-enriched horizons that are thought to result from pedogenic processes. Various hypotheses are proposed for expected clay size-distributions in soil profiles. The average size of clay crystallites determined by the amount of broadening of x-ray diffraction peaks ranged from 160 to >2000Aº , but the lack of trends in four loess-derived soils did not permit the hypotheses to be evaluated. An unexpected relationship in a well expressed illuvial horizon was noted: as the percent of accumulated clay increased to the observed maximum the average crystallite size also increased rather than decreased as proposed. This suggests that small-sized …

An Evaluation Of The Dental Annuli Technique For Determining Age Of White-Tailed Deer In Lowa, Arnold J. Sohn

Proceedings of the Iowa Academy of Science

During 1965-66, 47 molars from deer (Odocoileus virginianus) of Iowa and adjoining states were sectioned and examined. An exposure of the cementum pad of the first lower molar of each deer was examined to determine if the gross-sectioning dental annuli method is suitable for determining age of Iowa whitetails. Six bison molars and one elk molar were also examined. Variations in both thickness and clarity of annuli in teeth from Iowa deer made accurate age determination impossible in most cases. Teeth from deer from the Upper Peninsula of Michigan showed more distinct annuli in the root pad of the …

Incidence Of Some Disease Antibodies In Iowa Deer, Arnold O. Haugen

Proceedings of the Iowa Academy of Science

Serum samples from white-tailed deer (Odocoileus virginianus) in Iowa were checked for various disease antibodies from 1959 through 1963. Leptospirosis antibodies were found in 9.5% of 369 sera checked. L. grippotyphosa (3.9%) L. pomona (3.6%) and L. autumnalis (2.8%) were found most frequently. L. ballum, L. hardjo, L. sejroe, and L. autralis were also noted. No evidence of brucellosis was found in 231 sera checked. Evidence for western or California strains of encephalitis was noted. Anaplasmosis was also present. Johne's disease antibodies were not found in a sample of deer from western Iowa.

Successful Renovation Of A Small Natural Iowa Lake, Terry Jennings

Proceedings of the Iowa Academy of Science

Center Lake, having a surface area of 264 acres, is located in northwestern Iowa. During 1958 management problems in the form of stunted bullheads and carp along with very poor fishing, indicated the lake should be renovated. During October, 1958 liquid toxaphene was applied at a rate of 0.05 ppm. Apparently, a complete kill resulted. During 1962 an estimate of the bluegill population was made. Nearly 1,100,000 bluegills or about 500 pounds per acre, were present at that time. The 1962 black crappie population was estimated at 250,000 or about 140 pounds per acre. Based on a comprehensive creel census …

Stratigraphic Leak At Springville Quarry, Fred H. Dorheim

Proceedings of the Iowa Academy of Science

Lime Creek Shale, containing an Upper Devonian conodont fauna, is exposed below Middle Devonian rocks at a quarry near Springville, Iowa. The occurrence is interpreted as a stratigraphic leak and is cited as further evidence of this condition occurring in a karst Devonian terrain.

Pop-Outs In Hematite Colored Concrete Floor, James H. Elwell, John Lemish

Proceedings of the Iowa Academy of Science

Pop-outs found in a hematite colored basement floor subjected to wetting and drying action were attributed to shale introduced into the concrete as fine aggregate. The shale particles in pop-outs were characterized by clear gel rims associated with the alkali-silica reaction as well as red-brown hydrated iron oxide gel caused by oxidation of indigenous iron. Fresh shale particles from the same fine aggregate source used in the concrete under investigation were placed in sodium hydroxide which developed reaction zones characteristic of the concrete reaction and were interpreted as evidence supporting the instability of this material in alkaline environment. The hematite …

Omnidirectional Electron Intensity Contours In The Earth's Outer Radiation Zone, Harry D. Owens

Proceedings of the Iowa Academy of Science

Intensity contour maps of the outer radiation zone for omnidirectional intensities of electrons with energies greater than 40keV, 230 keV, and 1.6 MeV are presented for the time period October, 1962, through January, 1963. The manipulations applied to the Explorer 14 data are discussed along with the salient features and advantages of this presentation.

Effect Of Thyroidectomy On The Mechanics Of Skeletal And Intestinal Smooth Muscle, Russell R. Rulon

Proceedings of the Iowa Academy of Science

Rats made hypothyroid by surgical thyroidectomy were compared with controls relative to the shortening velocity and maximum shortening ability of the intestinal smooth muscle and the gastrocnemius. Hypothyroidism showed some potentiation of maximum shortening, but no effect on the shortening velocity of the gastrocnemius. Intestinal smooth muscle maximum shortening as well as shortening velocity tend to be depressed. There is some evidence for a differential effect of thyroid hormone lack in the two muscle types.

Effects Of Medication On Respiration Pattern Of Tranquilized White Mice, Lester C. Shell, Judith A. Burdick, Kenneth Wilson

Proceedings of the Iowa Academy of Science

White mice of varying ages were given a definite amount of the tranquilizer, reserpine, over a three-week period. At the end of this period, respiration rates were determined by use of a physiograph with impedance pneumograph and small animal attachments. Mice were given, in addition to the tranquilizer, varying dosages of different medicinals, and their respiratory pattern was recorded. Such medicinals as thyroxin, streptomycin, vitamins E and C were given and in combination with sulfanilamide, nicotinamide, neonal, kayquinone, hykenone. Effects of multiple medications were noted and recorded. Reserpine, when given in all combinations, lowered the respiratory rate from that recorded …

A Ph Study Of Four Media Inoculated With Bacteria And Protozoa, Robert F. Mote

Proceedings of the Iowa Academy of Science

Fifteen species of protozoa were used for a 36 day period to test the pH of four protozoa media. During this experiment the pH was determined every three days for control media, the media with bacteria, and the media with bacteria and protozoa. The pH curve included a lag phase, an acceleration phase, a plateau, and a decline with three of the four media during the 36 days. The fourth medium did not have a decline from the plateau during the 36 days. The protozoa and the four media are described.

Professional Courses For Teacher Certification, Clifford Bishop, George W. Denemark, Henry J. Hermanowicz, William E. Drake

Faculty Publications

The three lectures comprising this document are introduced with a foreword by Clifford L. Bishop and an introduction by William H. Dreier; both of the Department of Education and Psychology which sponsored the Central State Colleges and Universities (CSCU) seminar on the professional program for undergraduates leading to teacher certification and the B.A. or B.S. degree. The lecture by George W. Denemark presents "A Proposed Common Professional Core for the Preparation of Teachers." He includes discussion of the context for curriculum planning and of the broad range of objectives for teacher education. In his discussion of "Ideal Experiences Needed in …

Annual Report Of The Registrar 1966-67, University Of Northern Iowa

Institutional Effectiveness & Planning Documents

Contents:

--- Comparisons Worth Noting
--- Summary of Attendance
--- Attendance by Sessions
--- Full-Time Equivalency Enrollment
--- Degrees Granted 1966-67
--- Pupils in Price Laboratory School 1966-67

Nsf Award To Iowa Academy

Iowa Science Teachers Journal

The National Science Foundation has awarded another $5,000 grant to conduct a fourth Junior Academy of Science Symposium in Iowa.

Aaas Research Funds

Iowa Science Teachers Journal

Each year the American Association for the Advancement of Science provides a refund of the membership dues for AAAS to state academies of science.

Florida State Curriculum Project For Williamsburg Junior High School

Iowa Science Teachers Journal

Students measure the force or drag on different surfaces with the aid of a force measurer and balloon with elevator box. Taking part in the project are, from left: Dennis Trayer, Mr. Carroll Scott, Karen Lindhart, Kathy Martin, and Bob Meade.

Iowa Science Engineering And Humanities Symposium

Iowa Science Teachers Journal

A list of dates to remember regarding the 1968 Iowa Science, Engineering and Humanities Symposium.

Report Of An Audio-Tutorial Learning Environment At The University Of Northern Iowa, Alan R. Orr

Iowa Science Teachers Journal

Recognizing the need for innovation in methodology, Postlethwait (1964-1965) has developed an integrated experience approach to learning called audio-tutorial. The Department of Science at the University of Northern Iowa, after investigating available data, initiated the use of an audio-tutorial method for part of its general botany course in the spring of 1966.

Applications For Membership: Central Association Of Science And Mathematics Teachers, Inc. / National Science Teachers Association

Iowa Science Teachers Journal

No abstract provided.

Some Trends In College Physics And Their Reflections On High School Physics, J. E. Kasper, L. D. Flansburg

Iowa Science Teachers Journal

We are much struck with the desirable results that follow from introducing brief discussions of modern physics topics during the course of ordinary, relatively routine first courses in physics for college freshmen and sophomores. We propose in this paper that teachers of secondary physics courses might well also consider the incorporation of such discussions into their courses.

For Those Interested

Iowa Science Teachers Journal

The following copies of special issues of The Oregon Science Teacher are available in the quantities and at the costs indicated.

One Historical Aspect In The History Of The Iowa Science Teachers Association

Iowa Science Teachers Journal

One historical aspect in the history of the Iowa Science Teachers is shown in the picture above. Mrs. B. Goetch of Story City was then President of the Iowa Science Teachers Association. It was at this meeting that the major discussion concerned the proposed merger of the Iowa Science Teachers Association with the Iowa Academy of Science and the formation of the Iowa Science Teachers' Journal.

The Iowa Academy Of Science: Its Opportunities, R. W. Hanson

Iowa Science Teachers Journal

Just what is the Iowa Academy of Science and what function does it serve? What worthwhile activities does it sponsor that might be improved with the establishment of a central office? These are questions that deserve answers.

James Hearst [Photo In The Waterloo Daily Courier]

James Hearst Documents

A newspaper clipping of a photograph of James Hearst taken by Dick Cole in 1967.

A Modern Farm Fable, James Hearst

James Hearst Documents

An essay on the economic aspects of farming as well as government policy on agriculture.

Advanced Placement Program Chemistry, Warren Classon

Iowa Science Teachers Journal

Chemistry is currently in its third year of operation in our Davenport High Schools. As classes in college freshman chemistry taught to seniors, it is offered to elected students. To be selected a student must meet certain criteria.

Hawkeye Science Fair - 1967

Iowa Science Teachers Journal

Veterans Memorial Auditorium in Des Moines will again be the site for the 1967 Hawkeye Science Fair on April 7 and 8.

Determination Of Enzyme Activity, Carl R. Gochnauer

Iowa Science Teachers Journal

Purpose: To show the enzyme activity of diastase upon starch by viscosity measurements.

Review - The Hydrogen Bond

Iowa Science Teachers Journal

The results of an examination of more than 3,000 original references are compiled in this work. The nature of the H bond and its influences on chemical properties, is given extensive treatment.

Review - The Microbial World

Iowa Science Teachers Journal

A brief review of the concepts of biology pertinent to an understanding of microbiology is among the first chapters of this book.

The Fourth Annual State College Of Iowa Science Symposium And Scholarship Competition

Iowa Science Teachers Journal

A one-day program of outstanding speakers is already arranged. Speakers were selected who are active researchers and can relate to an audience of excellent high school science students and their teachers.