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The Dilemma Facing The Small School, Wayne P. Truesdell

History of Education Book Gallery

No abstract provided.

Growth Of The White-Mouse Gastrocnemius Muscle Ii. In Non-Terrestrial Gravity, Charles C. Wunder, John W. C. Bird

Proceedings of the Iowa Academy of Science

Exposure of white mice (Swiss Webster, female; NLW, male and female) to 1.5 to 7.0 G's of chronic centrifugation from the age of 5 weeks for durations of 1 to 8 weeks is known to cause some reduction in body growth. However, the retardation of muscular development was not as drastic. When corrections were made for differences between experimental and control body mass by means of Huxley's Equation for Heterauxic Growth, the muscles of experimental mice were seen to be larger than those of control animals of the same size. The measurements of muscle size, in order of increasing high-G …

Fauna Of Testate Amoebae From The Rhytidome Of Juglans Nigra, Ronald E. Goddard, Paul A. Meglitsch

Proceedings of the Iowa Academy of Science

Samples of bark without visible lichen or moss cover were taken from a Juglans nigra located in a city lot in Des Moines, Iowa, remote from water. Euglypha ciliata, E. cuspidata, Microchlamys patella, Centropyxis aerophilus, and two unidentified species of Difflugia were found, ranging from ground level to heights of 35 feet. An estimate of population density, based on a modification of the most probable number count, showed evidence of zonation on the tree surface, with C. aerophilus restricted to near ground level, M. patella occurring approximately evenly up to 35 feet, and E. cuspidata most abundant at moderate heights. …

The Dipole Moments, Molar Refractions And Ultraviolet Spectra Of Several Substituted, Β-Alkyl-Β-Nitrostyrenes, K. W. Kraus, R. J. Dolter, G. E. Petrowski, R. T. Bogan, R. J. Buenker, J. E. Plamondon, J. J. Miller, D. L. Whalen, D. J. Koopman

Proceedings of the Iowa Academy of Science

The dipole moments, molar refractions, and some ultraviolet absorption data ( λ_max and ε_max) are reported for β -methyl- β -nitrostyrene (4.25 D, 51.8 ml, 307 mμ., 12,200), the p-methoxy (5.04 D, 59.2 ml), p-methyl (4.66 D, 54.8 ml), p-fluoro (2.82 D, 49.5 ml, 308 mμ, 11,000), p-chloro (2.68 D, 54.5 ml, 310 mμ, 14,200), p-bromo (2.71 D, 55.8 ml, 308 mμ, 17,000), p-iodo (2.91 D, 62.8 ml, 318 mμ, 15,500), p-nitro (1.12 D, 55.1 ml, 302 mμ, 16,600), & p-cyano (1.15 D, 54.5 ml, …

Upstream Watershed Activities In Iowa And Our Environment, Wilson T. Moon

Proceedings of the Iowa Academy of Science

Watershed activities in Iowa have had considerable impact on the welfare and environment of our people. Reductions in floodwater, sediment, and erosion damages to lands have been the principal benefits. Preservation and enhancement of the environment is recognized as a by-product for better living for both rural and urban residents. The Flood Control Act of June 22, 1936, a Congressional appropriation in 1953 of 5 million dollars for Pilot Watershed Projects, and the Watershed Protection and Flood Prevention Act of 1954 (Public Law 566) have been the principal means of initiating watershed projects in Iowa during the past 25 years. …

The Giant Boulders Of The Iowan Drift And A Consideration Of Their Origin, Richard A. Dirks, Carl R. Busch

Proceedings of the Iowa Academy of Science

Samples of the large granitic boulders of the Iowan drift were analyzed and features of the boulder distribution were examined. The analysis gave evidence of a central body of single granite stock which included more than 80 per cent of all large boulders examined within the Iowan drift area. Characteristics of this main granite stock were then compared to the bedrock areas which could be considered source regions of the boulders. All evidence pointed toward a source region in the large granite body found in central and west central Minnesota. Weathering and structural features of the boulders suggested that they …

Anatomic And Physiologic Effects Of The Antithyroid Drug, Propylthiouracil, On Rats, A. James Shold

Proceedings of the Iowa Academy of Science

Administration of the antithyroid drug, propylthiouracil (PTU), to albino male rats at the dietary level of 0.1 % PTU is accompanied by a decrease in growth rate and a decrease in the oxygen consumption rate. After the initial administration of PTU, prolonged treatment with the drug did not further lower the oxygen consumption rate. The ratios of organ weight to body weight for the testes, stomach, thyroid, eyes, pituitary, and brain were found to be larger in the treated rats than in the untreated controls. The organ weight to body weight ratios of the spleen, liver, kidneys, and heart were …

High School And College Physics - Can We Match Impedances?, Herbert Priestley

Iowa Science Teachers Journal

Enrollments in high school and college physics have been declining in a serious fashion over the past few years. As a result, it is estimated that probably less than 10 per cent of the present national population has any experience in physics.

Supreme Court Voids "Anti-Evolution" Law

Iowa Science Teachers Journal

The United States Supreme Court has handed down a decision declaring unconstitutional the Arkansas statute prohibiting the teaching of evolution in the state's public schools. The National Science Teachers Association and the National Education Association filed a brief as amici curiae in support of the appellants, Mrs. Susan Epperson and H. H. Blanchard.

A Different Approach To The Study Of Pressure-Volume Relationship Of Gases, Harold Wengert

Iowa Science Teachers Journal

One of the problems in teaching science for general education is that all too often the ideas and concepts are given to the prospective learner before he has had an opportunity to wrestle with them himself.

Open Letter To Science Teachers: Let's Reflect For A Moment . . . ., Lynn W. Glass

Iowa Science Teachers Journal

Did you greet eager, inquisitive students last September that for some reason unknown to you became inactive and bored by May? What possibly is the cause for the decline in student enthusiasm?

A Summary Of A Survey Of Science Taught In Hampton Elementary Schools, Kenneth E. Moeller

Iowa Science Teachers Journal

In 1957 the Russians put an artificial satellite into orbit. Since that time science education in the United States has been experiencing a steady change. This change has not only been in course name and content but also in new methods of science teaching. The role of the science teacher is most important in the teaching of the new science materials. The instructor must be able to guide and direct the activities of the students, not just spew forth information. Often in the past, the instructor has taught as he had been taught. Most courses now are developed along these …

Nsta Science Source Book For Junior High Available

Iowa Science Teachers Journal

"A Universe to Explore," a source book resulting from a joint project of the National Aeronautics and Space Administration and the National Science Teachers Association, features illustrated lessons in space science that have been successfully performed by junior high school students.

Nsta Annual Meeting In Cincinnati March 13-17

Iowa Science Teachers Journal

The NSTA Annual Meeting (formerly called the annual convention) will be held in Cincinnati, Ohio, March 13-17. The theme is: "Science Teaching Toward the World We Want."

Cover - Ias & Ists Officers, Directors And Chairpersons - Ist Journal Information - Table Of Contents

Iowa Science Teachers Journal

No abstract provided.

An Accurate Method For The Determination Of Surface Area, Larry L. Schenken

Iowa Science Teachers Journal

Many times it is necessary for teachers or students to determine the surface area of irregular objects (e.g., leaves) during laboratory investigations. The usual procedure involves laboriously tracing the outline of the object on graph paper, counting the number of square units on the paper, and then adding some "fudge factor" to estimate partially encircled squares.

Open Letter To Science Teachers, Clifford G. Mccollum

Iowa Science Teachers Journal

Our responsibilities as science educators have never been greater than they are today." I know personally that such a statement has been made regularly since the 1930s, and I suspect it was commonplace some before that. These responsibilities have had various emphases identified as the reason for their being. The emphases have included such applications as those made to industry, engineering, medicine, warfare, and space exploration.

Nsta Science Source Book For Junior High Teachers Available

Iowa Science Teachers Journal

"A Universe to Explore," a source book resulting from a joint project of the National Aeronautics and Space Administration and the National Science Teachers Association, features illustrated lessons in space science that have been successfully performed by junior high school students.

The Iowa Soil Survey And Its Use In Land Use Planning, Lacy I. Harmon

Proceedings of the Iowa Academy of Science

The soil surveys in Iowa are being made by the Soil Conservation Service in cooperation with Iowa Agricultural and Home Economics Experiment Station, Iowa Agricultural Extension Service, and State Soil Conservation Committee. Soil Survey field work is now completed in 26 counties, and is in progress in 18 additional counties. In soil survey operations, soils are first classified into the National Soil Classification System. Soils are then identified in the field and delineated on 4"-to-the-mile aerial photographs. After field work is completed, a soil survey report, including maps, is published. Soil survey reports include interpretations which organize and present knowledge …

University Of Northern Iowa Fact Book, 1969-1970, University Of Northern Iowa

University of Northern Iowa Fact Book

Contents:

--Type of Institution
--Accreditation
--Location and Size of Campus
--Athletic Plant of 166 Acres
--President
--Fall Enrollment Through the Years
--Number of Buildings
--Appropriations
--Valuation of Instructional Equipment
--Tuition and Fees
--Administrative Organization
--University Employees
--Number of Graduates
--Officers of Administrative Divisions
--Officers of Academic Divisions
--Types of Education Offered
--Special Services
--Principal Buildings - Instruction
--Administrative & Plant Facilities
--Student Housing and Food Services
--Buildings Under Construction & Those in the Planning Stage
--Miscellaneous & Other Buildings
--Index

Understanding Of Science By Elementary Teachers, Daryl D. Smith

Proceedings of the Iowa Academy of Science

This paper reviews some studies relating to the subject matter competency of pre-service elementary teachers. Attention is called to the importance of an understanding of the nature of science by the elementary major, and the need to measure this understanding. A study designed to test the understanding of and attitude toward science in elementary majors is discussed. The scores of elementary majors on the understanding of science measure are compared with those of other prospective teachers (both secondary and elementary). It is suggested that a measure of this type could be used as a basis for evaluation of innovations in …

The University Of Northern Iowa Herbarium, Lawrence J. Eilers

Proceedings of the Iowa Academy of Science

The herbarium of the University of Northern Iowa has moved into new quarters in the recently-constructed Science Building. The facility contains enough cabinet space for over 50,000 plant specimens, a herbarium office, and ample storage space for the botanical portion of the Martin L. Grant library, given the university recently by Mrs. Janet Grant. The herbarium office houses Dr. Grant's bibliography of Iowa plants, called the "Records of Iowa Plants". This cross-indexed file contains thousands of references on 3" x 5" cards to publications on the taxonomy and distribution of Iowa plant species. These are available for use by interested …

Sheath And Cellular Irregularities Of Sphaerotilus Natans Caused By Ferric Ammonium Citrate And Glucose, David H. Tjaden, Robert C. Goss

Proceedings of the Iowa Academy of Science

Growth in citrate broth was turbid, rusty brown in color with some slime formation. The glucose broth had a milky white color with pronounced slime accumulation. Cells grown on the citrate medium were uniformly spaced within the sheath and ranged from 1 to 4 μ in length and 1 to 2 μ in width. The sheath was uniform in shape and ranged from 2.0 to 2.5 μ in width in young cultures. Sheath irregularities began to appear by the third day and were the greatest, 1 to 12 μ, by the fifth day when they gave the appearance of disintegrating. …

Chlorophyll Content In Mutants Of Glycine Max (L.) Merril During Seedling Development, Susan Coiner, Alan Orr

Proceedings of the Iowa Academy of Science

Xantha form mutants of Glycine Max (L.) Merril were examined for their chlorophyll content during early seedling development. Trifoliate leaves of 8-24 day old dark green, light green and yellow plants differed significantly in chlorophyll content. Total chlorophyll content in all three phenotypes increased up to approximately the 16th day followed by a slight drop from the 16th to the 24th day. The relative proportion of chlorophyll a to chlorophyll b differed among the three leaf types.

Annual Report Of The Registrar 1968-69, University Of Northern Iowa

Institutional Effectiveness & Planning Documents

Contents:

--- Comparisions Worth Noting
--- Summary of Attendance
--- Attendance by Sessions
--- Full-Time Equivalency Enrollment
--- Degrees Granted 1968-69
--- Degree Summary
--- Pupils in Price Laboratory School 1968-69

Title Page - Front Matter

Proceedings of the Iowa Academy of Science

No abstract provided.

Table Of Contents

Proceedings of the Iowa Academy of Science

No abstract provided.

A Comparative Study Of The Ontogeny Of Macrosclereids And Osteosclereids In The Integument Of Cassia Fasciculata And Desmodium Canadense, Philip J. Arnholt

Proceedings of the Iowa Academy of Science

Developmental patterns, developmental sequence, deposition of secondary wall material, and maturation of macrosclereids and osteosclereids were similar in Desmodium canadense and Cassia fasciculata. Both species apparently lack a well-defined strophiolar region. Two distinct differences were observed in the mature seed coat. One is the presence of a single row of macrosclereids in the hilar region of Cassia fasciculata and a double row of macrosclereids in the hilar region of Desmodium canadense. The second is the appearance of "spicule-like" structures, apparently enveloped laterally by a cellulosic matrix in the cuticularized layer of Cassia fasciculata.

Relationship Of Pectic Enzymes To Abscission, Daryl D. Smith

Proceedings of the Iowa Academy of Science

A comprehensive review of work pertinent to changes in the separation zone prior to abscission is presented. Since these changes are largely pectic in nature the involvement of pectic enzymes is suggested. The results obtained for the role of pectin methylesterase (PME) in abscission are as follows: (1) A localization of PME activity in the abscission zone of tobacco pedicels was established; (2) Pollination of tobacco flowers is followed by an increase in PME activity in the abscission zone while PME activity remains static after prevention of pollination (the flower abscises within a week if not pollinated); (3) Application of …

The Iowa State Preserves System: A Progress Report, Edward T. Cawley

Proceedings of the Iowa Academy of Science

The Iowa State Preserves System was formed by action of the 61st General Assembly in 1965. It is administered by the State Advisory Board for Preserves. The function of the board is to locate, dedicate, direct management, and protect areas of natural, archeological, historical, geological or scenic value. To date nine areas have been dedicated: Hayden Prairie, Kalsow Prairie, Pilot Knob State Park, Sheeder Prairie, and White Pine Hollow, as Nature Preserves; Fish Farm Mounds, Turkey River Mounds, and Wittrock Indian Village as Archeological Preserves; and Fort Atkinson as a Historical Preserve. Nine additional areas have been recommended for preserve …