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Articles 4531 - 4560 of 6760
Full-Text Articles in Physical Sciences and Mathematics
Schedule (1991), Association Of Christians In The Mathematical Sciences
Schedule (1991), Association Of Christians In The Mathematical Sciences
ACMS Conference Proceedings 1991
An Eighth Conference on Mathematics from a Christian Perspective
Student Seminars On "Famous Equations", Richard G. Montgomery
Student Seminars On "Famous Equations", Richard G. Montgomery
Humanistic Mathematics Network Journal
No abstract provided.
The Human/Computer Interface: Their Side Or Ours?, R. S.D. Thomas
The Human/Computer Interface: Their Side Or Ours?, R. S.D. Thomas
Humanistic Mathematics Network Journal
No abstract provided.
An Historical Approach To Precalculus And Calculus, Victor J. Katz
An Historical Approach To Precalculus And Calculus, Victor J. Katz
Humanistic Mathematics Network Journal
No abstract provided.
Augsburg's Humanistic Curriculum Project, Larry Copes, Beverly Stratton
Augsburg's Humanistic Curriculum Project, Larry Copes, Beverly Stratton
Humanistic Mathematics Network Journal
No abstract provided.
An Alternative Approach To The History Of Mathematics, Claudia Henrion
An Alternative Approach To The History Of Mathematics, Claudia Henrion
Humanistic Mathematics Network Journal
No abstract provided.
Mathematics: Contributions By Women, Jacqueline M. Dewar
Mathematics: Contributions By Women, Jacqueline M. Dewar
Humanistic Mathematics Network Journal
No abstract provided.
How Mathematics Teachers Use "Writing To Learn", Susan Hunter
How Mathematics Teachers Use "Writing To Learn", Susan Hunter
Humanistic Mathematics Network Journal
No abstract provided.
On Teaching In The Mathematical Sciences, James M. Cargal
On Teaching In The Mathematical Sciences, James M. Cargal
Humanistic Mathematics Network Journal
No abstract provided.
The Annual Meeting Of The Iowa Academy Of Science April 19-20, 1991 [Program, 103rd Meeting], Iowa Academy Of Science
The Annual Meeting Of The Iowa Academy Of Science April 19-20, 1991 [Program, 103rd Meeting], Iowa Academy Of Science
Iowa Academy of Science Documents
Contents:
Program Summary --- 5
General Session Speakers --- 10
Awards --- 13
Distinguished Fellow --- 13
Distinguished Iowa Scientist --- 14
Symposia Programs --- 15
Poster Session --- 18
Campus Map --- Centerfold
Section Programs --- 19
Agricultural Sciences --- 20
Anthropology --- 21
Botany --- 21
Cellular & Molecular Biology --- 23
Chemical Education --- 27
Chemistry, Inorganic --- 27
Chemistry, Organic --- 29
Conservation --- 31
Earth Science Teaching --- 32
Elementary Science Teaching --- 32
Engineering --- 32
Geology --- 35
Linguistics --- 37
Nursing --- 38
Physics --- 38
Physiology --- 39
Psychology --- 40 …
Program Abstracts, 103rd Session, Iowa Academy Of Science, April 19-20, 1991, Iowa Academy Of Science
Program Abstracts, 103rd Session, Iowa Academy Of Science, April 19-20, 1991, Iowa Academy Of Science
Iowa Academy of Science Documents
Presentation abstracts from the annual meeting of the Iowa Academy of Science
Plate Tectonics, Space, Geologic Time, And The Great Plains: A Primer For Non-Geologists, Robert F. Diffendal Jr.
Plate Tectonics, Space, Geologic Time, And The Great Plains: A Primer For Non-Geologists, Robert F. Diffendal Jr.
School of Natural Resources: Faculty Publications
For most Americans, "The Great Plains" evokes images of grasslands, dust storms, prairie fires, Native Americans on horseback, cowboys and wheat lands, and perhaps flat valleys crossed by braided rivers carrying a heavy load of sand and gravel, extremes of weather, and a climate typified by an alternation of droughts and wetter periods. Geologists picture such general images, too, but they also see radical changes in the landscape over periods expressed in millions rather than hundreds of years. Geologically speaking, human activities on the Great Plains are too recent to have much of a place in the broad geologic history …
Index For Volume 98
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Auxin-Regulated Gene Expression, Tom J. Guilfoyle
Auxin-Regulated Gene Expression, Tom J. Guilfoyle
Journal of the Iowa Academy of Science: JIAS
A number of cDNA clones to independent mRNAs that increase in amount after brief exposure to auxins have been isolated. From soybean, sequenced, and characterized. Increases in mRNA abundance can be detected as early as 2.5 minutes after auxin application to excised elongating regions of soybean hypocotyls. Increased transcription rates on the genes which encode the auxin-responsive mRNAs account, at least partly, for the accumulation of mRNAs. A variety of auxins induce the accumulation of the mRNAs, but other plant hormones have no effect on the mRNA abundance. Some of the genes which encode the mRNAs are clustered in the …
Stimulus Response Coupling In Auxin Action, K. R. Libbenga
Stimulus Response Coupling In Auxin Action, K. R. Libbenga
Journal of the Iowa Academy of Science: JIAS
This paper not available at time of printing.
Lxodes Dammini (Acari, Ixodidae) And Borrelia Burgdorferi In Iowa, Mark G. Novak, Wayne A. Rowley, Kenneth B. Platt, David M. Bartholomew, Michelle D. Senne
Lxodes Dammini (Acari, Ixodidae) And Borrelia Burgdorferi In Iowa, Mark G. Novak, Wayne A. Rowley, Kenneth B. Platt, David M. Bartholomew, Michelle D. Senne
Journal of the Iowa Academy of Science: JIAS
A statewide study to evaluate the presence, distribution and abundance of the deer tick, Ixodes dammini, and the spirochete, Borrelia burgdorfen, in Iowa was initiated in 1989. Six hundred and seventy-one tick collections were received from health professionals, conservation employees and concerned citizens. Additional ticks were obtained by flagging, small mammal trapping and deer checks in selected areas of Iowa. Nine I. dammini were collected in 1989 from seven counties in the eastern half of the state. Six of these were tested for B. burgdorferi and all were negative. Flagging, small mammal trapping and deer checks in eastern Iowa failed …
Radon In Iowa Homes: Results Of Screening Measurements, Laurent Hodges, Lynne Gillette
Radon In Iowa Homes: Results Of Screening Measurements, Laurent Hodges, Lynne Gillette
Journal of the Iowa Academy of Science: JIAS
Homeowner-initiated short-term radon screening measurements in Iowa homes show that only about 30% of the homes have low enough radon levels - below 148 Bq/m (4.0 pC1/L) - that no follow-up measurements are necessary. Over 6 percent of the homes have screening measurements in excess of 740 Bq/m3 (20 pCi/L), a level at which prompt follow-up measurements are recommended. In all parts of the state, the range of radon results extends from low levels (below 37 Bq/m3 = 1 pCi/L) to high levels (above 740 Bq/m3). The average radon results tend to be higher than the …
Editorial Board & Iowa Academy Of Science Officers And Directors
Editorial Board & Iowa Academy Of Science Officers And Directors
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Iowa's Climate As Projected By The Global Climate Model Of The Goddard Institute For Space Studies For A Doubling Of Atmospheric Carbon Dioxide, E. S. Takle, S. Zhong
Iowa's Climate As Projected By The Global Climate Model Of The Goddard Institute For Space Studies For A Doubling Of Atmospheric Carbon Dioxide, E. S. Takle, S. Zhong
Journal of the Iowa Academy of Science: JIAS
Results of a global climate model that simulates climate under a doubling of atmospheric carbon dioxide (estimated to occur by the latter half of the twenty first century) have been interpolated to Iowa. Summer temperatures under such a doubling are projected to rise by 4 to 7°F (2.2 to 3.9°C) and winter temperatures by 10 to 11° (5.6 to 6.1°C). Estimates of space heating and cooling demands from these data suggest a 30 to 35% decrease in space heat demand and a 200 to 300% increase in space cooling demand. Temperature variability is projected to decrease. Precipitation estimates from global …
Comparison Of Dinitrogen Fixation And Nitrogen Transfer Potentials Of Four Red Clover Cultivars, D. E. Farnham, A. P. Mallarino, W. F. Wedin, I. T. Carlson
Comparison Of Dinitrogen Fixation And Nitrogen Transfer Potentials Of Four Red Clover Cultivars, D. E. Farnham, A. P. Mallarino, W. F. Wedin, I. T. Carlson
Journal of the Iowa Academy of Science: JIAS
The capacity to fix atmospheric N2 and thus reduce the use of N fertilizer is an important reason for including legumes in forage mixtures. Selection for more efficient N2 fixation could improve red clover (Trifolium prateme L.) (RC) production and its contribution to soil fertility. An isotope dilution study was conducted in two greenhouse experiments to compare the N2 fixation and N transfer potentials of three commercial and one experimental RC cultivars. The experimental cultivar APR-8701 was selected for traits related to increased N2 fixation (rate of acetylene reduction, root size and branch number, and nodule …
Annual Report Of The Iowa Academy Of Science, 1990-91, Paul E. Rider
Annual Report Of The Iowa Academy Of Science, 1990-91, Paul E. Rider
Journal of the Iowa Academy of Science: JIAS
Starting in 1976, annual reports have served as a continuing record of the activities of the Iowa Academy of Science. These augment a 100 year history of the Academy which was written in the centennial year of 1975.
This report covers the period from July 1, 1990 to June 30, 1991. It is based on the official records of the Academy (committee reports, Board minutes, correspondence) as well as the recollections, impressions and musings of the author.
In Search Of A Gibberellin Receptor, Lalit M. Srivastava, Konrad A. Sechley
In Search Of A Gibberellin Receptor, Lalit M. Srivastava, Konrad A. Sechley
Journal of the Iowa Academy of Science: JIAS
Use of tritiated gibberellins ([3H] GA1, [3H] GA4) of high specific activity and purity has allowed the determination of GA-specific binding sites in several plant tissues both in vivo and in vitro. In cucumber hypocotyls and pea epicotyls which have been most investigated the binding of [3H] GA; occurs to soluble proteins. This binding is saturable ('n' =about 30 pmol. Mg-1 soluble protein), of high affinity (KD= about 70 nM), and is competed for by other GA, and derivatives in proportion to their biological activity in these …
Part I - Papers Presented At The 1989 Plant Science Lecture Series
Part I - Papers Presented At The 1989 Plant Science Lecture Series
Journal of the Iowa Academy of Science: JIAS
The first six titles in this issue of the Journal of Iowa Academy of Science are papers presented at the 1989 edition of the Plant Science Lecture Series held annually at Iowa State University. This lecture series focuses each year on some aspect of plant biology, and each series is composed of six to eight seminars related to a theme that is selected to be timely and related to improvement of field, forage, forest and horticultural crops.
The Axr1 Mutation Of Arabidopsis Is Expressed 10 Booth Roots And Shoots, Cythia Lincoln, Mark Estelle
The Axr1 Mutation Of Arabidopsis Is Expressed 10 Booth Roots And Shoots, Cythia Lincoln, Mark Estelle
Journal of the Iowa Academy of Science: JIAS
In order to identify genes involved in auxin action we have isolated a number of mutants of Arabidopsis thaliana which are resistant co exogenous application of either indole-3-acetic acid or 2, 4-dichlorophenoxyacecic acid. One of the genes identified in chis way is the Axr1 gene. Recessive mutations in this gene confer resistance co auxin as well as a number of morphological defects. In this report we describe the isolation of at least two new axr1 alleles. In addition, we show that the axr1 mutation affects gravitropic growth of the root, auxin-induced ethylene biosynthesis and growth in tissue culture. Our results …
The Future Of Lasers And Laser Applications, William C. Stwalley
The Future Of Lasers And Laser Applications, William C. Stwalley
Journal of the Iowa Academy of Science: JIAS
Lasers are increasingly used in· an astounding variety of scientific, engineering, medical and commercial applications. Here the prospective improvements in lasers will first be addressed, e.g., improvements in wavelength range, tunability, pulse duration, efficiency, cost, etc.
Laser applications will then be briefly surveyed, including selected topics involving basic research, materials processing, analytical and diagnostic applications, information transmission and storage, measurement and alignment and photochemical and biomedical application.
Results Of The August Roadside Survey For Upland Wildlife In Iowa: 1963-1988, Willie J. Suchy, Ronald J. Munkel, James M. Kienzler
Results Of The August Roadside Survey For Upland Wildlife In Iowa: 1963-1988, Willie J. Suchy, Ronald J. Munkel, James M. Kienzler
Journal of the Iowa Academy of Science: JIAS
Results of the August roadside survey collected from 1963 through 1988 were examined to determine if trends could be detected in the counts of ring-necked pheasants (Phasianus colchicus), northern bobwhite (Colinus virginianus), gray partridge (Perdix perdix), cottontail rabbits (Sylvilagus floridanus), and white-tailed jackrabbits (Lepus townsendii). The counts also were compared to harvest estimates co determine if correlations exist. Statistically significant linear trends were detected statewide for pheasants, gray partridge and jackrabbits during the 1963 co 1988 period. Trends were downward for all species except gray partridge. During the late 12 years (1977 through 1988), the only significant trend detected was …