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- Biotechnology (3)
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- Agronomic traits (2)
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- Cytoplasm (2)
- Microorganisms (2)
- Sorghum bicolor L. Moench (2)
- 2-Furanthiocarboxyhydrazones (1)
- AIB (1)
- Ada Hayden (1)
- Antibacterial studies (1)
- Atrazine (1)
- Biological control (1)
- Biological pesticides (1)
- Botrychium campestre (1)
- Botrychium matricariifolium (1)
- Cesium-137 (1)
- Charles Keyes (1)
- Charles Wachsmuth (1)
- Charles White (1)
- Chernobyl (1)
- Chlorophyll fluorescence (1)
- Chloroplasts (1)
- Conservation (1)
- Corn (1)
- Cystopteris fragilis (1)
- Cystopteris laurentiana (1)
- Drosophila species (1)
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Articles 1 - 30 of 47
Full-Text Articles in Education
Pumps, Filters, And Lenses; Humanistic Issues In Calculus Reform, Dan Kalman
Pumps, Filters, And Lenses; Humanistic Issues In Calculus Reform, Dan Kalman
Humanistic Mathematics Network Journal
No abstract provided.
The Visits Of Hassler Whitney To Brazil: Hassler Whitney, In Memoriam, Ubiratan D'Ambrosio
The Visits Of Hassler Whitney To Brazil: Hassler Whitney, In Memoriam, Ubiratan D'Ambrosio
Humanistic Mathematics Network Journal
No abstract provided.
Hassler Whitney 1907-1989: Some Recollections, 1979·1989, Anneli Lax
Hassler Whitney 1907-1989: Some Recollections, 1979·1989, Anneli Lax
Humanistic Mathematics Network Journal
No abstract provided.
Lessons From Cognitive Theory For Teaching Mathematical Modeling To Freshmen, Richard H. Elderkin
Lessons From Cognitive Theory For Teaching Mathematical Modeling To Freshmen, Richard H. Elderkin
Humanistic Mathematics Network Journal
No abstract provided.
Pdp/Academic Excellence Workshops In Mathematics, M. Catharine Hudspeth
Pdp/Academic Excellence Workshops In Mathematics, M. Catharine Hudspeth
Humanistic Mathematics Network Journal
No abstract provided.
Education Is For The Students' Future, Hassler Whitney
Education Is For The Students' Future, Hassler Whitney
Humanistic Mathematics Network Journal
No abstract provided.
Mathematics Appreciation: A Humanities Course, Thomas L. Bartlow
Mathematics Appreciation: A Humanities Course, Thomas L. Bartlow
Humanistic Mathematics Network Journal
No abstract provided.
Introducing Undergraduates To Mathematics Information Resources, Sallie H. Barringer
Introducing Undergraduates To Mathematics Information Resources, Sallie H. Barringer
Humanistic Mathematics Network Journal
No abstract provided.
Tapping Creativity And Ingenuity Of Liberal Arts Majors In A Math Course, Helen Christensen
Tapping Creativity And Ingenuity Of Liberal Arts Majors In A Math Course, Helen Christensen
Humanistic Mathematics Network Journal
No abstract provided.
An Empowering, Participatory Research Model For Humanistic Mathematics Pedagogy, Arthur B. Powell, Dawud A. Jeffries, Aleshia E. Selby
An Empowering, Participatory Research Model For Humanistic Mathematics Pedagogy, Arthur B. Powell, Dawud A. Jeffries, Aleshia E. Selby
Humanistic Mathematics Network Journal
No abstract provided.
Biological Pesticides: Biotechnology's Answer To Silent Spring, Donald H. Dean
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 …
Public Policy On The Introduction Of Genetically Engineered Microorganisms, Anne K. Vidaver
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 …
Ada Hayden: A Tribute, Duane Isely
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 …
Plant-Parasitic Nematodes In Iowa, Don C. Norton
Plant-Parasitic Nematodes In Iowa, Don C. Norton
Journal of the Iowa Academy of Science: JIAS
Ninety-nine species of plant-parasitic nematodes are recorded from Iowa. Twenty-seven are new state records. Most samples were collected from around maize or from prairies or woodlands. Similarity (Sorensen's index) of species was highest for the maize-prairie habitats (0.49), compared with maize-woodlands (0. 23), or prairie-woodland (0. 3 7) habitats. Nematode communities were most diverse in prairies with a Shannon-Weiner index (H') of 2.74, compared with 1.65 and 1.07 for woodlands and maize habitats, respectively. Evenness of species (J') was 0.41, 0.78, and 0.48 for maize, prairies, and woodlands, respectively.
Effects Of Intensive Training On Prolactin Responses To Submaximal Exercise In Males, A. C. Hackney, R. L. Sharp, W. S. Runyan, R. J. Ness
Effects Of Intensive Training On Prolactin Responses To Submaximal Exercise In Males, A. C. Hackney, R. L. Sharp, W. S. Runyan, R. J. Ness
Journal of the Iowa Academy of Science: JIAS
The purpose of this study was to determine if serum prolactin responses to submaximal exercise were affected by 8 weeks of intensive training (5 cl/wk, 90 min/d 65-200% V02max). Nine males performed 90 minute continuous exercise bouts (cycle ergometry; 65% V02 max) at the end of 1, 4, and 8 weeks of training. Blood samples were obtained pre-training, and pre-, post-exercise. Significant differences were not seen in pre- and post-exercise prolactin levels at weeks 1 and 4. However, at week 8 the post-exercise prolatin was significantly greater than the pre-exercise levels (6.8 ± 0.9 vs 3.8 ± …
Additions To The Iowa Pteridophyte Flora - Iii, James H. Peck
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.
Semiquantitative Measurement Of Fission Produced Gamma Ray Radioactivity In Soils At Dubuque, Iowa, James A. Dockal, James A. Dockal Sr.
Semiquantitative Measurement Of Fission Produced Gamma Ray Radioactivity In Soils At Dubuque, Iowa, James A. Dockal, James A. Dockal Sr.
Journal of the Iowa Academy of Science: JIAS
Residual fission-product radionuclide contamination (fallout) in soils at Dubuque, Iowa was evaluated with an Exploration geometrics gamma ray scintillometer in 1985 and after the Chernobyl accident in 1986. Anomalous amounts of gamma ray radiation were found near where downspouts discharged storm runoff from the roof of a dwelling. The 1985 residual cesium-13 7 activity in the soils of the area was found to be 0.2 pCi/gram with an areal contamination of 16 ± nCi/m2. Activities associated with the soils near the discharge points of the downspouts ranged as high as 8 pCi/gram. This contamination seems to have occurred prior to …
Index For Volume 96
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.
The Vascular Flora Of Pilot Knob State Preserve, William C. Watson
The Vascular Flora Of Pilot Knob State Preserve, William C. Watson
Journal of the Iowa Academy of Science: JIAS
Pilot Knob State Preserve is a 365 acre (147 ha) area lying within the boundaries of Pilot Knob State Park. Located in north central Iowa near the northeast corner of Hancock County, this preserve resides on the eastern morainal system of the Des Moines Lobe left from the Wisconsinan glaciation. The vegetation of the preserve is primarily a deciduous woodland on rolling hills interspersed with wetland habitats in the hollows. Iowa's only floating bog is present in one of these hollows and supports numerous vascular plants uncommon to the state. Two species, Carex cephalantha (Bailey) Bickn. and Drosera rotundifolia L., …
Ecology Of Iowa Drosophila Ii. Lowland Forest And Sand Prairie, Neil J. Jennings, Robert D. Seager
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 …
Program Abstracts, 101st Session, Iowa Academy Of Science, April 21-22, 1989, Buena Vista College
Program Abstracts, 101st Session, Iowa Academy Of Science, April 21-22, 1989, Buena Vista College
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
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.
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Hybrid Performance Of Sorghum Parental Lines Developed By Mass Selection And S1 Yield Testing, K. R. Ess, R. E. Atkins
Hybrid Performance Of Sorghum Parental Lines Developed By Mass Selection And S1 Yield Testing, K. R. Ess, R. E. Atkins
Journal of the Iowa Academy of Science: JIAS
Experiments were conducted co obtain information on the effects of two methods of developing parental lines from a random-mating population of sorghum (Sorghum bicolor L. Moench) on hybrid performance. Gridded mass selection for threshed panicle weight was used in developing IAP1R(M)C3: and a sister population, IAP4R(S1)C3, was advanced each cycle on the basis of grain yield of S1 families in replicated yield trials. Hybrids with male parents developed by mass selection did not differ significantly for grain yield and panicles/plant from those with parents chosen on the basis of S1 yield tests. The S1-selection hybrids …
Synthesis And Antibacterial Studies Of Some 2-Furanthiocarboxyhydrazones, Xiaorong Li, Zoumin Sun, James C. Chang
Synthesis And Antibacterial Studies Of Some 2-Furanthiocarboxyhydrazones, Xiaorong Li, Zoumin Sun, James C. Chang
Journal of the Iowa Academy of Science: JIAS
Seven 2-furanthiocarboxyhydrazones were prepared, 5-nitro-furaldehyde-2-furanthiocarboxyhydrazone from the reaction of 2-furanthiocarboxyhydrazide with 5-nitro-2-furaldiacetate and the others from the condensation of 2-furanthiocarboxyhydrazide with aldehydes: 2- furaldehyde, benzaldehyde, p-hydroxybenzaldehyde, o-methoxybenzaldehyde, o-vanillin, and salicylaldehyde. The seven 2-furanthiocarboxyhydrazones were tested for their antibacterial activities against Staphyloccocus aureus and Bacillus subtilis. 5-Nitro-2-furaldehyde-2- furanthiocarboxyhydrazone was found to display the strongest bacterotoxicity.
Release And Behavior Of Recombinant Bacteria In Field Studies, Steven E. Lindow
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 …