Digital Commons Network^™

Additions To The Iowa Pteridophyte Flora - Iii, James H. Peck

Journal of the Iowa Academy of Science: JIAS

To prior reports on the studies of the Iowa pteridophyre flora, five taxa (Botrychium campestre Wagner & Farrar, Botrychimn matricariifolium A. Braun, CyJtopterislragilis (L) Bernh., Cystopteris laurentiana (Weath.) Blasdell, and Lycopodium inundatum L.) are added, along with 215 new county occurrence records for 39 taxa. Currently, the Iowa preridophyte flora consists of 70 taxa, supported with 1656 county occurrence records; only 72 (4%) of these records are based solely on collections made before 1950.

Biological Pesticides: Biotechnology's Answer To Silent Spring, Donald H. Dean

Journal of the Iowa Academy of Science: JIAS

In the 25 years since the publication of Rachel Carson’s Silent Spring the public has come to realize the environmental impact of heavy use of chemical pesticides. To add insult to injury, many insects, including the disease vector, the mosquito, are now virtually resistant to standard chemical pesticides. Biotechnology is now providing a positive response to these dilemmas through the production and development of improved forms of microbial pest control agents: biological pesticides. Biological pesticides are pathogens, or predators, of insects such as bacteria, fungi, and viruses, and predatory insects or vertebrates such as mosquito fish which reduce the population …

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.

Inhalt Of Erforschung Biologischer Ressourcen Der Mongolei Volksrepublik, Band 6 (1985/1986), Martin-Luther-Universität

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Table of contents of Erforschung biologischer Ressourcen der Mongolischen Volsrepublik, Band 6 (1985/1986).

Neue Literatur (Page 102), Martin-Luther-Universität

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Bibliographical references, new literature listed in Erforschung biologischer Ressourcen der Mongolischen Volsrepublik, Band 6 (1985/1986).

Neue Literatur (Page 62), Martin-Luther-Universität

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Neue literature listed on page 62 of Erforschung biologischer Ressourcen der Mongolischen Volsrepublik, Band 6 (1985/1986). Als "Ergebnisse der mongolischen Gemeinschaftsreisen von Ornithologen aus der DDR 1979 und 1983" unter Leitung von Dr. G. MAUERSBERGER (Berlin) erschienen in Fortsetzung der Zusammenstellung in Band 5 (5. 58) dieser Publikationsserie folgende Beiträge.

Über Die Konzeptionelle Entwicklung Der Ornithologischen Erforschung .Der Mongolei, G. Mauersberger

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Die bisherigen Ergebnisse der Erforschung der mongolischen Avifauna legen einen analytischen Überblick über ihre Geschichte nahe. Unlängst hat PIECHOCIU (1984) ei.nen Abril'; dieser Geschichte von ihren Anfängen bis heute vorgelegt. Ein Blick auf die konzeptionelle Entwicklung offenbart beträchtliche Unausgewogenheiten zwischen den einzelnen ForschunHsdisziplinen.

1. Der Bestand der Vogelfauna ist in den Grundzügen erfa~t, doch blieben weite Lückenoffen, narnentlich in den östlichen und südöstlichen Landesteilen.

2. Die phänologische Forschung wird künftig (nicht nur während des Herbstzuges) zu verstärken, aber auch auf ein weiteres, vor allem ökoloSJisch determiniertes Spektrum auszudehnen sein.

3. Die zooueographischen BeziehunHen erscheinen verhältnismäßig klar, müssen aber neu bewertet …

Title Page And Verso Of Erforschung Biologischer Ressourcen Der Mongolischen Volksrepublik, Band 6 (1985/1986), Martin-Luther-Universität

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Title page and verso of Erforschung biologischer Ressourcen der Mongolischen Volksrepublik band 6 (1985/1986)

Internationale Konferenz "Naturbedingungen Und Biologische Ressourcen Der Mongolischen Volksrepublik" Im Oktober 1986 In Moskau, Michael Stubbe, Werner Hilbig

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Vom 14. bis 17. Oktober 1986 organisierte die Akademie der Wissenschaften der UdSSR anläJßlich der 15jährigen erfolgreichen Arbeit der Gemeinsamen Sowjetisch-Mongolischen Komplexen Biologischen Expedition der AdW der UdSSR und MVR eine internationale wissenschaftliche Vortragstagung über die" Naturbedingungen und biologischen Ressourcen der MVR". Auf der Konferenz wurden etwa 200 Teilnehmer registriert: u. a, 28 aus der MVR, 1 aus der VR Ungarn, 13 aus der DDR, 7 aus der VR Polen und 6 aus der ČSSR.

Hohes Lebensalter Von Salpingotus Crassicauda Und Erfolgreiche Fortpflanzung Von Cardioeranius Paradoxus (Mammalia: Dipodidae) In Der Gefangenschaft, Michael Stubbe, Annegret Stubbe, Ravčigijn Samjaa

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Noch immer gelten zahlreiche Arten der zentralasiatischen Säugetierfauna als kaum bis wenig erforscht. Fundierte ökologische Untersuchungen an den mongolischen Springmausarten liegen bisher nicht vor. Sowohl Salpingotus crassicauda als auch Cardiocranius paradoxus sind durch ihre begrenzten Vorkommen in Kasachstan bzw. Tuva sogar im Rotbuch der Sowjetunion (1985, Literatur S. dort) verankert.

Characteristic Of Balneologically Active Components And Microflora Under Extreme Conditions Of Mineral Waters Of The Mongolian People's Republic, G. M. Špejzer, L. A. Mineeva, N. M. Žigunova, T. N. Putjatina

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

The distribution of amino acids is irregular in mineral waters. Their content is minimum in cold carbonate waters of hydrocarbonate composition, the highest amino acid concentration does not exceed 0.640 mg N/l.

Hydrothermal solutions are enriched with amino-acids to the greatest extent, the amino contents coming up to 0.780 mg N/l in hydrotherms of sulfate-sodic composition. In thermal waters enriched with hydrosulfides. amino acids are present in quantities up to 1.710 mg N/l.

Mineralwässer wichtige Bestandteile der Biogeosphäre. Die darin enthaltenen spezifischen Komponenten bedingen ihre Wirksamkeit in biologischen Prozessen. die die Entstehung und Lebenstätigkeit von der Mikroflora bis zu den …

Multinuclear Magnetic Resonance Studies Of Lithium Binding And Transport In Human Erythrocytes, Maryceline Tiausas Espanol

Dissertations

No abstract provided.

Binding And Transport Properties Of Lithium In Red Cells From Hypertensive Patients And Normotensive Controls, Ravichandran Ramasamy

Dissertations

No abstract provided.

Synthesis And Study Of N-(4-Nitrobenzofurazan)-Monoaza-18-Crown-6: A Metal Sensitive Fluorophore, Shelley A. Krause

Dissertations

No abstract provided.

A Characterization Of Tampa Bay Sediments, L J. Doyle, G. R. Brooks, K. A. Fanning, E. S. Van Vleet, R. H. Byrne, N. J. Blake

Reports

This initial phase of the project involves assessing the present state of knowledge of sediments in Tampa Bay and the identification of data gaps, or areas where more detailed information is required to achieve project objectives. The literature search produced 273 data sources that from their abstracts in the data base are applicable to the project (Appendix I). Data sources were reviewed by experts in the fields of sedimentology, nutrient chemistry, organic geochemistry, trace metal and radionuclide geochemistry, and benthic biology who then contributed the following summary sections.

13.4.11. Control Of Purple Loosestrife, Daniel Q. Thompson

Waterfowl Management Handbook

Purple loosestrife is an herbaceous perennial weed that is native to Eurasia and probably arrived in eastern North America with early maritime traffic. The spread of this alien by 1900 (Fig. 1) was closely associated with canal and waterway traffic. By 1985 (Fig. 2), this aggressive weed had spread into all of the contiguous States north of the 35th parallel except Montana; similarly, all of the southern provinces of Canada had been invaded. In the last 20 years, loosestrife has become well established in reclamation projects and riparian wetlands in the West and Northwest. It has also invaded estuarine marshes …

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 …

Editorial Board & Iowa Academy Of Science Officers And Directors

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.

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.

Release And Behavior Of Recombinant Bacteria In Field Studies, Steven E. Lindow

Journal of the Iowa Academy of Science: JIAS

Numerous opportunities exist for the utilization of genetically engineered microorganisms for useful purposes in agriculture and in waste management. An extremely diverse array of microorganisms is likely to be considered for such processes as biological control of plant pests, degradation of to toxic wastes, reclamation of rare metals and other processes. For some purposes, such as in the degradation of toxic materials, it may be possible to make biologically compromised microorganisms that will exist only in the presence of the toxic chemicals that they were designed to transform. A better understanding of the genetics, biology and physiology of microorgansims which …

Index For Volume 96

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Geochemical Evidence For Suppression Of Pelagic Marine Productivity At The Cretaceous/Tertiary Boundary, James C. Zachos, Michael A. Arthur, Walter E. Dean

United States Geological Survey: Staff Publications

The normal, biologically productive ocean is characterized by a gradient of the ¹³C /¹²C ratio from surface to deep waters. Here we present stable isotope data from planktonic and benthic microfossils across the Cretaceous/Tertiary boundary in the North pacific, which reveal a rapid and complete breakdown in this biologically mediated gradient. The fluxes of barium (a proxy for organic carbon) and CaCO, also decrease significantly at the time of the major marine plankton extinctions. The implied substantial reduction in oceanic primary productivity persisted for ~0.5 Myr before the carbon isotope gradient was gradually re-established. In addition, the …

The Iowa Science Teachers Fall Conference And School Science And Mathematics Association Annual Convention, 1989, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Map ... 3
Speakers: Sam Rhine, Bill Aldridge, Bonnie Litwiller ... 4
Sessions ... 7
Application for Membership ... Centerfold
Registration Forms ... Centerfold

Iowa Academy Of Science Directory, 1989-90: Officers, Committees, And Membership Roster, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Board of Directors ... 5
Program Directors ... 6
Editors ... 7
Committees ... 9
Sections ... 24
Awards of Merit ... 29
Excellence in Science Teaching Awards ... 31
Past Presidents ... 33
Membership Roster ... 34
Constitution and Bylaws ... 50

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 …

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.

Public Policy On The Introduction Of Genetically Engineered Microorganisms, Anne K. Vidaver

Journal of the Iowa Academy of Science: JIAS

This presentation raises questions of research needs and issues. Underlying assumptions are that only beneficial or useful microorganisms will be "released"; that extensive laboratory and contained experiments will have been done prior to introduction and live microorganisms can be confined within the areas of introduction. Evidence to support these assertions will be presented. Critical needs for progress in this area include: 1) Recognition that the nature of the product introduced into the environment is of primary significance, not how the organism was genetically altered or modified. 2) Recognition that microorganisms are introduced into the environment as part of our daily …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.