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Characterization Of Aminoisobutyric Acid Transport Systems In Mcf-8, A Line Of Malignant Mouse Mammary Epithelial Cells, Bruce A. Voyles

Journal of the Iowa Academy of Science: JIAS

Uptake of α-aminoisobutyric acid (AIB) by MCF-8, a line of malignant mouse mammary epithelial cells derived from a D2 hyperplastic nodule outgrowth, was found to be mediated by two different transport systems. In actively dividing cells about 60% of total AIB uptake is mediated by an A-like system: transport was Na+ -dependent, was inhibited by N-methyl-AIB, was maximal at pH 7.5 and ceased at pH 6. Transport by this system was reduced by nearly 65% when cell division ceased in confluent cultures, but the addition of insulin and/or calf serum to the medium of quiescent cells restored activity. Transport by …

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Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Nesting Of Raptors Uncommon In Iowa: Summary And New Records, Dean M. Roosa, Jon Stravers

Journal of the Iowa Academy of Science: JIAS

The nesting status of the Turkey Vulture, Bald Eagle, Northern Harrier, Sharp-shinned Hawk, Cooper's Hawk, Red-shouldered Hawk, Broad-winged Hawk, Swainson's Hawk, Peregrine Falcon, Common Barn-Owl, Burrowing Owl, Long-eared Owl and Short-eared Owl is reviewed and previously unpublished records added. Also the potential for the Northern Saw-whet Owl and Osprey to nest in Iowa is discussed. Although several species are on the brink of extirpation as part of Iowa's nesting avifauna, the Bald Eagle has returned as a regular nester. Over 100 previously unpublished nesting reports and some management recommendations are included.

A Non-Gall Forming Eurosta Solidaginis (Diptera: Tephritidae), W. Bryan Stoltzfus

Journal of the Iowa Academy of Science: JIAS

Eurosta Jolidaginis (Fitch) can parasitize Solidago canadensis without forming a gall. This non-gall former apparently escapes most of the parasitism and predation of the gall forming fly. Levels of host-plane infestation by non-gall formers may approach the frequency of gall formation.

The Scientist's Role In The Controversy Over Genetic Engineering, Regulation And Utilization Of Microorganisms: A Symposium Presented At The L00th Annual Meeting Of The Iowa Academy Of Science, Iowa State University, Ames, Iowa April 21-23, 1988: Introduction, Arthur K. Weissinger

Journal of the Iowa Academy of Science: JIAS

The introduction of technologies for the direct genetic manipulation or alteration of organisms offers tremendous promise of improved agronomic prosperity through the enhancement of existing agricultural systems and through development of alternative products and methods. These technologies also pose philosophical, socioeconomic, and environmental questions. A number of these questions were considered at the bioethics symposium that was held here at Iowa State last November, the purpose of which was to examine the social, ethical, regulatory, and legal issues associated with the application of cell culture, molecular biology, and other so-called biotechnologies to agriculture.

Questions And Discussion [The Scientist's Role In The Controversy Over Genetic Engineering, Regulation And Utilization Of Microorganisms: A Symposium], Arthur Weissinger

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.

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Journal of the Iowa Academy of Science: JIAS

No abstract provided.

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Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Pollen Fertility And Agronomic Performance Of Sorghum Hybrids With Different Male-Sterility-Inducing Cytoplasms, R. E. Secrist, R. E. Atkins

Journal of the Iowa Academy of Science: JIAS

Effects of three sources of male-sterility-inducing cytoplasm in sorghum [Sorghum bicolor (L.) Moench] were compared in crosses with 217 male parents. Hybrids of these parents and A2 Redbine 58', 'A3 Combine Kafir 60', and 'A4 Martin' female parents were evaluated for percentage stained pollen, seed set of bagged panicles, plant height, and days to midbloom. Additionally, hybrids of 12 of the inbreds crossed to each female parent were evaluated for grain yield and other agronomic traits in comparison with hybrids in A1 male-sterility-inducing cytoplasm.

Twenty-one inbreds restored pollen fertility to hybrids with A2 cytoplasm, 11 restored pollen fertility to …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cytoplasmic Effect On Groat Protein Content In Lnterspecific Matings Of Avena Sativa L. And A. Sterilis L., A. Rezai, K. J. Frey

Journal of the Iowa Academy of Science: JIAS

Thirty sets of reciprocal isopopulations, each with 20 Fi-derived oat lines from the BC₀, BC₁, and BC₂ of all possible matings among five Awia slerilis L. accessions and two A. saliva cultivars, were evaluated in a replicated field trial to determine whether groat protein content was influenced by cytoplasmic inheritance and to study associations between protein content and agronomic traits. A. slerili cytoplasm had no direct effect on groat protein content, but significant interactions between the cytoplasms and nuclear genes from A. saliva and A. s1erilis were detected. Thus, the potential may exist for improving …

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Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Dedication

Basic Communication Course Annual

No abstract provided.

Editor's Page, Lawrence W. Hugenberg

Basic Communication Course Annual

I am excited about this inaugural Basic Course Annual. The essays published in this volume are exciting and form a solid foundation upon which future editions will rest. There are a variety of essays included, some related to the history of the basic course, others offering insights into basic course pedagogy, and others discussing the administration of multisectioned basic communication courses.

Using Plays And Novels As Case Studies In The Basic Course, Roger Smitter

Basic Communication Course Annual

Article presents a rationale for the use of case studies and the case study method in the undergraduate speech communication classroom. Examples are provided for using plays and novels. The advantages and disadvantages of using plays and novels as cases are presented.

Title Page

Basic Communication Course Annual

No abstract provided.

Teaching Ethics In The Basic Survey Speech Communication Course, William A. Haskins

Basic Communication Course Annual

The teaching of ethics in speech communication courses is not new to most communication curricula. Emphasis upon teaching ethics in speech communication courses, however, appears to be growing. Attention on the teaching of ethics appears to be growing as well as in many basic speech communication classes. This paper, then, provides general suggestions on teaching ethics in a basic speech communication course.

The Basic Course In Speech Communication: An Historical Perspective, Pamela L. Gray

Basic Communication Course Annual

The purpose of this paper is to trace some of the changes that have taken place in the basic course in speech communication through the use of representative literature concerning the basic course.

In addition, a direction for the future, indicated by the literature, will be suggested. This paper should serve as both an historical perspective of this course and a summary of the changes that may have occurred as this course has responded to philosophical/ intellectual and/or pragmatic pressures.

Implications Of Student And Instructor Involvement In The Basic Course, Samuel P. Wallace, Don B. Morlan

Basic Communication Course Annual

The purpose of the study is to test the notion that students in the basic course who possess high levels of communication competence will perform better in and subsequently will be more satisfied with the course than their counterparts with low levels of competence. Results show no support for the initial hypothesis. Further analysis, however, showed that the level of instructor competence has a significant effect on student evaluation of instructors.

Training Or Teaching? A Professional Development Program For Graduate Teaching Assistants, Douglas M. Trank

Basic Communication Course Annual

Basic course directors are urged to consider the range of roles available to them in working with graduate teaching assistants. The key element in establishing an effective professional development program is the development of an appropriate atmosphere where the graduate instructors know they are viewed as valuable members of the faculty. Such a program must remain flexible enough to meet the needs of the graduate instructors and the department it serves. Treating graduate instructors as colleagues and involving them in the process, giving them power and freedom, and valuing the teaching they do benefits the students, the graduate instructors, the …

Teaching Basic Courses: Problems And Solutions, Richard L. Weaver Ii, Howard W. Cotrell

Basic Communication Course Annual

Basic speech courses enroll many students. Basic course instructors are often under great pressure to succeed and to be effective. Because of the numbers of students and the pressures, they experience many problems. Five are discussed in this article: rigor versus leniency, independence versus dependence, theory versus skills, being close versus being distant, and objective evaluation versus subjective evaluation. Solutions to these problems are likely to affect both student and instructor motivation. Solutions are also likely to affect how students perceive instructors. That's why, with respect to basic course instructors, you have to have solutions for the problems.

Mutant Weeds Of Iowa: S-Triazine-Resistant Plastids Chenopodium Album L., Jack Dekker, Ronald Burmester

Journal of the Iowa Academy of Science: JIAS

S-triazine resistance in common lambsquarters (Chenopodium album L.) has been reported previously but not in Iowa. A study was conducted using a chlorophyll a fluorescence assay to confirm the presence of resistance in C. album populations in Iowa. Variable chlorophyll a fluorescence assays confirmed that mutations conferring resistance exist in five (5) geographically separated populations of C. album in Iowa: relatively greater fluorescence yields were measured in untreated resistant tissue compared with untreated susceptible plants, relatively greater fluorescence yield in treated compared with untreated susceptible leaf disks; and similar fluorescence yields of treated and untreated resistant tissue. This is the …

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.

Ada Hayden: A Tribute, Duane Isely

Journal of the Iowa Academy of Science: JIAS

Dr. Ada Hayden was a member of the Iowa State College of Botany faculty, 1920-1950. Her floristic studies of the lake region in northern Iowa are possibly the most authoritative for any part of the state. Hayden was curator of the Iowa State herbarium, 1934-1950, and contributed immeasurably to its development. This research facility has recently been named the Ada Hayden Herbarium. In the sense that L. H. Pammel was father of the Iowa State park system, her bequest is the state preserves. After some 25 years as a conservation activist, she published descriptions of 22 prairie areas in ten …

Ecology Of Iowa Drosophila Ii. Lowland Forest And Sand Prairie, Neil J. Jennings, Robert D. Seager

Journal of the Iowa Academy of Science: JIAS

The seasonal abundances of Drosophila species collected from a lowland forest community and from a sand prairie community in northeastern Iowa are compared. With some important exceptions, the patterns seen in the lowland forest community were similar to what had been observed in a previous collection (Jennings et al. 1985). Fewer species and many fewer individuals were collected from the sand prairie community, although in general the patterns seen were similar to those of the lowland forest community. Strong evidence of microhabitat differentiation was seen in both communities. In contrast to our previous study, none of the seasonal abundance patterns …

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.