Science and Mathematics Education Commons^™

Inheritance And Number Of Genes Affecting Quantitative Traits Within F2 Maize Populations, D. H. Schmidt, A. R. Hallauer

Journal of the Iowa Academy of Science: JIAS

Populations derived from crosses of elite genotypes are commonly used in plant breeding programs. Knowledge of the genetic variation among individuals and their progenies within F2 populations is essential for effective selection of important traits. The genetic variation and number of effective factors affecting the expression of quantitative traits within 30 F2 maize (Zea mays L.) populations were determined by different methods suggested for study of F2 populations. Estimates of heritability and number of effective factors varied among F2 populations for each trait, primarily because of the differences in trait expression between parents of crosses and the environmental effects upon …

Science In A Constructivist Classroom: Progress In A Five-Year-Old Child's Reasoning About Water Dynamics, Hyang-Lim Kwak

Dissertations and Theses @ UNI

The purpose of the study is to understand changes in a target child’s reasoning about water dynamics, specifically, draining and movement of water in tubes. The study also focuses on development and evaluation of activities and teaching strategies. The activities were conducted with all children in the preschool at a public elementary school in Iowa as part of the regular classroom constructivist program inspired by Piaget’s work. Using Piaget’s theory to provide insights into the child’s reasoning and knowledge, analysis focused on the child’s construction of regularities between his actions and reactions of water, and on the construction of relationships …

The Annual Meeting Of The Iowa Academy Of Science April 22-23, 1994 [Program, 106th Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 5
General Session Speakers --- 9
Awards --- 12
Symposia Programs --- 13
Poster Session --- 18
Map --- Centerfold
Section Programs/Special Sessions --- 22
Agricultural Sciences --- 22
Anthropology --- 23
Botany --- 27
Cellular & Molecular Biology --- 28
Chemistry, Inorganic --- 29
Chemistry, Organic --- 31
Conservation --- 32
Earth Science Teaching --- 34
Engineering --- 34
Geology --- 34
Linguistics --- 38
Nursing --- 39
Physics --- 39
Physiology --- 40
Psychology --- 42
Science Teaching --- 42
Zoology --- 43
Annual Meeting Committee --- 45
Local Arrangements Committee --- 45
IAS …

106th Session Iowa Academy Of Science Awards Luncheon, April 22, 1994, Iowa Academy Of Science

Iowa Academy of Science Documents

Program:

--- Introduction of Head Table - Jean Prior, President, Iowa Academy of Science
--- Recognition of students participating in various statewide activities - Larry Schwinger, Chair, Student Programs Committee
--- Presentation of scholarship winners and 1995 AJAS representatives - Peggy Tilgner, Wartburg College, Waverly
--- Presentation of Excellence in Science Teaching Awards - Roy Unruh, Director, ESTA Program

Cover - Front Matter - Table Of Contents

Iowa Science Teachers Journal

No abstract provided.

Computers In The Science Classroom, Piroz Mohseni

Iowa Science Teachers Journal

Computers have become an integral part of the education system, and computer literacy is an important asset for any college student. Many students find that their exposure to computers at the high school level was not satisfactory. Thus they hesitate to enroll in computer enhanced mathematics or science courses at the college level. This paper discusses some of the avenues for secondary science instructors to incorporate computers into their current curriculum. It also examines computer use to enhance students' understanding of science and mathematical concepts.

Understanding Vs. Knowing, John R. Stiles

Iowa Science Teachers Journal

How well do students understand concepts in science? Are teachers evaluating what students actually comprehend or merely how well they can recite information? How valuable are tests? What do they actually measure? How appropriate are the lessons to the children's developmental levels?

These and similar questions should be an important part of every teacher's evaluation procedure. We need to stop and ask ourselves such questions as: Why do I want my students to know this? Will knowing this make a difference in their lives? Is it important? Do the students really understand this? How can I be sure? From here, …

Measurement In Elementary Science, Barbara A. Bonnett

Iowa Science Teachers Journal

Ten year olds have great difficulty drawing the human face and form in proportion. To see if that skill could be enhanced, our fifth grade class set out to explore human proportion and measurements using metric rulers, meter sticks, graph paper and helpful partners.

An Analysis Of Physical Science Textbooks For Scientific Literacy, Hussein A. Baarah, Trudi L. Volk

Iowa Science Teachers Journal

Developing the scientifically literate individual is considered to be an important objective of science education in the United States (Blough and Schwartz 1990, Maarschalk 1988, Murane and Raizen 1988, National Science Teachers Association 1971, 1982; and Simpson and Anderson 1981). The scientifically literate person understands how science, technology and society influence one another, and is able to use this knowledge in everyday decision making (AAAS 1989, Yager and Harms 1981).

Science Calendar

Iowa Science Teachers Journal

No abstract provided.

Editorial Office & Staff; Officers, Iowa Academy Of Science; Executive Board & Regional Directors, Iowa Science Teachers Section

Iowa Science Teachers Journal

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Selective Recovery Of Β-Galactosidase With Charged Fusion Tails Using Ion-Exchange Membranes, Erika A. Thiem, Meng H. Heng

Journal of the Iowa Academy of Science: JIAS

We explored the feasibility of attaching charged tails to a target protein, in this case β-galactosidase, for selective recovery. In this process, an ion-exchange membrane was used for selective binding and release of β-galactosidase with the attached purification fusions. Strength of binding and purity of eluate increased with increasing tail length. In addition, activity yield was improved with the implementation of an intermediate partial elution recycle procedure.

Research Papers By 1992 And 1993 Interns In The Program For Women In Science And Engineering At Iowa State University, Mary Ann Evans, Krishna S. Athreya

Journal of the Iowa Academy of Science: JIAS

The papers in this volume offer a sampling of the outstanding work of high school and undergraduate interns who participated in the 1992 and 1993 Program for Women in Science and Engineering (PWSE) summer internship programs. From synthesis of materials to developing effective methods of hazardous waste disposal, from nondestructive structural studies at the macroscopic level to microstructural analyses of materials, from testing precision of sensors used as aids in agriculture to isolating effects of specific parameters on plant growth, to name a few, these papers span a wide range of scientific methods and disciplines. They serve as testimony to …

Iowa Academy Of Science Directory, 1994-95, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Board of Directors ... 3
Program Directors ... 4
Editors ... 6
Committees ... 8
Sections ... 21
ISTS Regional Directors ... 36
Awards of Merit ... 28
Excellence in Science Teaching Awards ... 29
Past Presidents ... 30
Membership Roster ... 31

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Effects Of Competition And Predation On Prothonotary Warblers And House Wrens Nesting In Eastern Iowa, Timothy Brush

Journal of the Iowa Academy of Science: JIAS

In a fragmented midwestern floodplain forest, a small Prothonotary Warbler (Protonotaria citrea) population experienced high competition with House Wrens (Troglodytes aedon) and mammalian nest predation in 1988-89. Despite the provision of 3 types of nest boxes and higher water levels, Prothonotary Warblers did not nest successfully and decreased in the fragmented forest in 1990-91. House Wrens used >90% of the nest boxes in both years. Wren territories doubled within the nestbox area, while remaining constant on an unmanipulated area. In contrast, a larger warbler population had high nesting success during 1990-91 in a relatively unfragmented, wetter forest tract. Such forests, …

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Use Of Ion Exchange Membranes For Selective Recovery Of Aspergillus Awamori Glucoamylase And Phage T4 Lysozyme, Deborah K. Stafslein, Jeff M. Hunter, Craig E. Forney

Journal of the Iowa Academy of Science: JIAS

Our research examined whether enhanced separation and purification of mutant enzymes could be obtained on ion-exchange membranes. Solutions of three mutants of Aspergillus awamori glucoamylase were passed through an anionic exchange membrane, as well as one mutant of T4 lysozyme through a cationic exchange membrane. The mutant enzymes were modified by adding "charged fusions'', polypeptides of either aspartic acid residues to increase the overall negative charge of the enzyme or arginine residues to increase the overall positive charge. The effect of the mutations on the purification of glucoamylase from a "modified" fermentation broth were examined at two different elution pHs, …

Age And Developmental History Of Iowa Fens, C. A. Thompson, E. A. Bettis Iii

Journal of the Iowa Academy of Science: JIAS

Iowa fens are small, mineorotrophic peatlands maintained by shallow groundwater. Eighteen fen sites located across northern Iowa were mapped and radiocarbon dated to assess the timing of initial peat accumulation. The radiocarbon ages span the Holocene, ranging from 1,240 to 10,900 B.P.; however most fens postdate 5,000 yr B.P. The dominance of late-Holocene ages suggests that Holocene climatic change may have strongly influenced the record of peat accumulation. During the mid-Holocene Iowa was warmer and drier than at present, and peat was degraded or accumulated slowly in fens. The range of ages also implies that the commencement and subsequent rate …

Nomenclatural Changes For Some Diatoms Found In Iowa, David B. Czarnecki

Journal of the Iowa Academy of Science: JIAS

Nomenclatural revisions for four diatom taxa found in Iowa, two of which are presently maintained in the Loras College Freshwater Diatom Culture Collection (FDCC), are necessary because of systematic interpretations of the Division Bacillariophyta. Achnanthidium hauckianum (Grun.) Czarnecki comb. nov. was originally assigned to the genus Achnanthes Bory. Three taxa were previously assigned to the morphologically diverse genus Navicula Bory. These are Cavinula weinzierlii (Schimanski) Czarnecki comb. nov., Craticula cuspidata var. major [(Meist.) Czarnecki comb. nov. and] Craticula halophila var. subcapitata (0str.) Czarnecki comb. nov.

Science Notes - Nabt Announces

Iowa Science Teachers Journal

The National Association of Biology Teachers (NABT) is seeking nominations for five secondary school biology teaching awards. Recipients will be recognized at the NABT National Convention in St. Louis, MO, November 16-19, 1994.

Science Notes - Aviation/Aerospace Teacher Institute

Iowa Science Teachers Journal

Teachers are invited to participate in the Science Center of Iowa's Aviation/ Aerospace Teacher Institute which will be held from 8 a.m. to 5 p.m., July 11-15, 1994. Teachers will receive classroom materials and training in a number of space-related activities. Activities will include simulating an aerospace flight and the design of the first Martian city.

Astronomy Bulletin - The Night Sky: July 5, 1994 To September 24, 1994, Patrick Steven Leiker

Iowa Science Teachers Journal

No abstract provided.

Science Notes - Ice Cream: An Edible Experiment In Thermodynamics

Iowa Science Teachers Journal

Ice keeps things cold because it absorbs energy from its surroundings, melting as it does so. The temperature at which a solid melts, called its melting point, is the same temperature at which the liquid form freezes. For pure water, this is 0° or 32° F. However, if some other substance, such as salt, is added to the water or ice, the freezing/melting point temperature is lowered. Thus, you can use salted ice to freeze liquid water.

Science Notes - Papers Solicited For Biology Curriculum Workshop

Iowa Science Teachers Journal

A workshop focusing on "Integrating Biology Across the Curriculum" will be held September 23-24, 1994. Educators are invited to submit abstracts describing exemplary integration strategies and information about successful and unsuccessful programs.

Editor's Corner - Editorial Privileges, Carl W. Bollwinkel

Iowa Science Teachers Journal

The editorship of the Iowa Science Teachers Journal has brought many privileges to this editor. Perhaps the greatest of these is the responsibility of determining what is most helpful for Journal readers and authors-those who establish the standards of science education in Iowa. This has not been an easy task and has often led to disagreement. This disagreement has been the basis of professional growth for writers, readers and editors-especially this editor. It is truly a privilege to maintain standards of quality.