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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.

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.

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.

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. …

The Flora Of Iowa Revived, Lawrence J. Eilers

Proceedings of the Iowa Academy of Science

Research on the flora of Iowa is being renewed by Dr. Robert F. Thorne and the author. A manual of the vascular plants of the state is planned for the near future. Some revisionary study of Iowa taxa needs to be completed first, but it is hoped that interested botanists will assist in the task. Although there are a few areas that need additional intensive collecting, the state has been quite well surveyed, floristically, and there is need to integrate the information into a usable publication.

A Bilateral Color Anomaly In The Crayfish, Orconectes Immunis (Hagen), Virgil E. Dowell, Leonard P. Winier

Proceedings of the Iowa Academy of Science

A live female crayfish; Orconectes immunis (Hagen) exhibiting unusual body coloration was given to the biology laboratories at the University of Northern Iowa for study. Its right half, including antennae and other appendages, was colored an azure blue; the left half was colored normally. This bilateral coloration mosaicism persisted following molting. Gynandromorphism as a corollary factor is eliminated on the basis that no apparent external sexual intergradation of sexual dimorphism was noticeable. Somatic mutation in early embryonic development is the most likely explanation. A mutation in a gene affecting some aspect of the biochemical synthesis pathway in pigmentation seems to …

The Clay Prairie In Butler County, Iowa, C. W. Lantz

Proceedings of the Iowa Academy of Science

The Clay Prairie is a small area of 2.64 acres of native prairie belonging to the University of Northern Iowa. It is located in Butler County, 15 miles northeast of Parkersburg, Iowa. A list of the species of the vascular plants found in this area is given, representing 33 families.

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.

Ethanol Precipitates Of Cephalobus Sp. (Nematoda: Cephalobidae) Inhibiting The Growth Of Staphylococcus Pyogenes Var. Aureus, Rollin H. Heinzerling, Robert C. Goss

Proceedings of the Iowa Academy of Science

Dried ethanol precipitates prepared from nematodes incubated for 7, 8, 15, 21 and 22 days produced significant inhibition of Staphylococcus aureus. The 7 and 15 day precipitates showed a linear increase in inhibition. Microscopic observation indicated that plates incubated for 8, 15, and 20 days had the greatest fraction of molting nematodes. Molting was correlated with inhibition.

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

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 …

Chromosome Number And Pollen Size In The Genus Aristida, Donald G. Delisle

Proceedings of the Iowa Academy of Science

Chromosome numbers and pollen measurements are given for sixty-four collections representing eight species in the grass genus Aristida from central and southwestern United States. Meiotic chromosome counts of N=22, 33, and 44, in A. purpurea are reported for the first time. Counts of N=11 and 22 in A. fendleriana, A. glauca, and A. wrightii, are new for these species, as are counts of N=11 for A. longiseta and A. roemeriana. The relationship of pollen size and ploidy level is examined in five taxa, and the occurrence of intraspecific polyploidy in the genus is noted.

Notes On Prairie Species In Iowa. Ii. Establishment By Sod And Seedling Transplants, Paul A. Christiansen, Roger Q. Landers

Proceedings of the Iowa Academy of Science

Success in establishment of prairie species was measured using sod and seedling transplants. Sod transplants, 25 cm in diameter and 10-20 cm in depth, were successful for 42 species. Fourteen species present in sod transplants set in both annual weeds and Bromus inermis sod illustrated the effect of competition on vigor. After two years, in the weedy plot, all species were present, 11 had flowered and 5 had spread. In the Bromus plot, 9 species had died, 2 had flowered and none had spread. Seedling transplants of 48 of 52 prairie species were present after overwintering. One-quart plastic bags and …

The Effects Of Sedimentation On The Water Quality Of The Coralville Reservoir, Iowa, Larry R. Mitzner, Donald B. Mcdonald

Proceedings of the Iowa Academy of Science

The Coralville Reservoir is a flood control impoundment located on the Iowa River just upstream from Iowa City. Since being placed in operation in 1958 its capacity at conservation pool level has been reduced nearly 20% by sedimentation. Studies of the reservoir's fishery have been conducted since 1961. Fish population surveys do not indicate a noticeable modification of the fish population due to siltation. A decrease in the total fish population, primarily sport fish, occurring early in 1965, was due to oxygen depletion caused by heavy farm land runoff. Limnological studies of the Iowa River and the reservoir have been …

Removal Of Brushy And Wooded Quail Habitat In Three Southern Iowa Counties In Recent Years, M. E. Stempel

Proceedings of the Iowa Academy of Science

In southern Iowa there are still remnants of once extensive brushy upland game cover. Cost-share and privately financed brush removal programs, however, are further reducing the amount of remaining game cover. Three counties are considered here. Davis, Monroe and Wapello counties had some federally assisted clearing on 490 farms in the past 4 years. On 14 farms (1,820 acres) in Wapello County, since 1956, 82 acres of woody cover were removed by all methods. This included 25% of the choice quality upland game cover.

Recent Status Of Ruffed Grouse In Iowa, Eugene D. Klonglan, Gene Hlavka

Proceedings of the Iowa Academy of Science

The ruffed grouse is a native Iowa game bird, formerly present in forested areas over much of the state. Intensive land use that replaced forested areas with croplands or grazed them heavily with livestock resulted in the disappearance of the species from all but northeastern Iowa by about 1930. Ruffed grouse are presently found in suitable forested habitat in all of Allamakee and Clayton Counties, most of Winneshiek County and in portions of Fayette, Dubuque, Delaware and Howard Counties immediately adjacent to occupied range in the three counties first listed. Spring roadside drumming counts have given an index of 1.6 …

Statistical Methods For Integrating Populations Of A Fauna Collected At Various Localities, D. E. Simon, J. H. Elwell

Proceedings of the Iowa Academy of Science

Parametrs characteristic of Atrypa Histrix, collected from various localities of the Cerro Gordo Member of the Upper Devonian Lime Creek Formation, were measured as: 1) Length, 2) Width, 3) Thickness, 4) Number of growth lines, and 5) Number of plications. The consistency of data obtained within a sample location was tested against similar data representing the total population by means of F-tests. Results suggested that the three sample locations represented at least two statistically random sample populations. These statistical differences in the single biologic population may be alternately interpreted as: 1) the population differed prior to preservation, or 2) is …

The Multistructured Course - A Preliminary Analysis, Paul A. Meglitsch

Proceedings of the Iowa Academy of Science

An experimental program in which students may enroll in courses for varying amounts of credit, and select course objectives that are in line with their educational goals is described. A preliminary analysis of the results indicates that students tend strongly to approve of the goals of the experiment, have performed well, and, on the whole, react positively to the educational conditions involved. Early evaluation appears to show that some of the techniques commonly used for introductory courses are applicable, and others not very applicable, to education in courses involving upper division and graduate students.

Notes On The Effects Of Pretreatment Of Spores On The Iodinophile Vacuole Of Henneguya Exilisl, Dennis Galinsky, Paul A. Meglitsch

Proceedings of the Iowa Academy of Science

Spores of Henneguya exilis from the gills of Ictalurus punctatus were exposed to Lugol's solution, Best's carmine, Bauer-Feulgen reaction, and Mitchell's ammoniacal silver nitrate techniques in smears and sections. All of the techniques recognized as specific for glycogen stained the iodinophile vacuole selectively but not specifically, but adjustments to techniques were required. Fresh spores held at room temperatures or chilled for 24 hours were similar insofar as the iodinophile vacuole is concerned, and freezing had little effect. A week or more at room temperature after chilling or freezing for one day resulted in more diffuse staining reactions.

Foreign Studies: Teacher's Guide, James Hantula

Faculty Publications

Foreign Studies; an elective course for junior and senior students; is a study of selected Asian cultures; including the nations of China; Japan; and India; and of African cultures; including the nations of Nigeria; Ethiopia; and the Democratic Republic of the Congo. Asia and Africa are studied from the American cultural viewpoint with emphasis upon the three concepts of culture; ideology; and the comparison of traditional and modern society. This teacher's guide is divided into four main sections. 1) An outline of content is presented from which many generalizations are developed. These generalizations provide the framework for the development of …

Development Of A Prediction Equation For The Placement Of Students In Seventh-Grade Life Science, Lloyd Harley Barrow

Dissertations and Theses @ UNI

It was the purpose of this investigation to: (1) determine the relative value of intelligence quotient, Iowa Tests of Basic Skills composite standard score, Iowa Tests of Basic Skills reading comprehension standard score, final sixth-grade science mark, and the Reed General Science Test score in predicting the life science mark; (2) present the findings that would provide the bast possible estimate of success in life science; and (3) compare the prediction equation for the enrichment group with the non-enrichment group's prediction equation. The study involved students of seventh-grade life science for the school years 1963 through 1968, who were enrolled …

An Evaluation Of The Futures Market In Live Beef Cattle As A Means Of Shifting The Risk Inherent In Cattle Feeding, Philip Paul Hufferd

Dissertations and Theses @ UNI

There has been extensive research and study in the area of hedging price risk of agricultural products on commodity futures markets. This work, however, has been limited almost entirely to the hedging of grain. The first attempt to conduct futures trading in a live commodity began on November 30, 1964, with the advent of futures trading in live beef cattle. In the absence of research and experience with trading of this kind there has been a tendency to transfer conventional futures market logic, with respect to hedging, almost unaltered to the futures market for live cattle. Some researchers have felt, …

Curriculum Evaluation Study And Recommended Revision For Dakota Christian High School, Martin Dekkenga

Dissertations and Theses @ UNI

The purpose of this study was to determine whether the curriculum at Dakota Christian High School (DCHS) was meeting the needs of its graduates. An auxiliary purpose_ was to share with the National Union of Christian Schools the findings of the study so that all member schools could have access to the information and thereby improve their own program or interest them in such an evaluation. The data was gathered by use of a questionnaire. Copies of the questionnaire were sent to most of the graduates of the ten graduating classes of DCHS. One hundred seventy-nine graduates were contacted and …

Differences In Campus Attitudes, Academic Achievement And Socio-Economic Background Between Student Leaders, The Students For A Democratic Society And The Student Body At-Large At The University Of Northern Iowa, Oral M. Custer Jr.

Dissertations and Theses @ UNI

The purpose of this study was to identify similarities and differences between three groups of students, the Student Senate, the Youth for a Better Society (Students for a Democratic Society when the study was initiated), and a sample of students representative of the student body at-large at the University of Northern Iowa. These groups were objectively and subjectively evaluated to identify any similarities and differences in (1) their attitudes toward the University, (2) their academic achievement and aptitude, and (3) their socio-economic background. Objective measures of these variables included the College and University Environment Scales (CUES), cumulative grade point averages, …

Inhabition Of Stapylococcus Pyogenes Var. Aureus With Ethanol-Extracted Precipitates Of Cephalobus Sp. (Nematoda: Cephalobidae), Rollin H. Heinzerling

Dissertations and Theses @ UNI

The purpose of this investigation was to make a preliminary biochemical study of the inhibition by an extract of the nematode Cephalobus and to test the inhibitive effect of the extract on the growth of Staphylococcus pyogenes var. aureus . Emphasis was placed upon the con - centration of inhibition-producing precipitates and correlating them with growth of S. aureus. Also investigated was the molting phenomenon of nematodes and its relation to inhibition-producing precipitates . Precipitates from ethanol extraction of the nematode of various days growth were tested for inhibition of S. aureus. Nematode-ethanol- precipitates which were eight , fifteen, twenty-one, …