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Social and Behavioral Sciences Commons™
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- Biotechnology (3)
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- Sorghum bicolor L. Moench (2)
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Articles 1 - 30 of 45
Full-Text Articles in Social and Behavioral Sciences
Remember The Elephants ... Forget Ivory
Animal Companions--The Promise Kept; The Problems Broken
Animal Companions--The Promise Kept; The Problems Broken
Close Up Reports
The powerful bond between people and dogs and cats is accompanied by serious ethical obligations on our part.
Land Capability And Land Use In The Leeuwin-Naturaliste Region, Peter John Tille, Neil Lantzke
Land Capability And Land Use In The Leeuwin-Naturaliste Region, Peter John Tille, Neil Lantzke
Journal of the Department of Agriculture, Western Australia, Series 4
The Leeuwin-Naturaliste region is one of Western Australia's most beautiful areas. Located in the far south-west corner of the State, it is a popular scenis and tourist spot, as well as supporting grazing, horticultureal and viticultural enterprises.
Outside of perth the region is the most popular tourist destination in the state. It is also responsible for about a quarter of the State's milk production, and 15 percent of the state's potato production and a quarter of the State's wine grapes.
Many new agricultural enterprises have opened up in the past 15 years, and the population has increased by almost 40 …
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 …
New Rules, New Technologies, And The Shape Of Minnesota Farming, Steven J. Taff
New Rules, New Technologies, And The Shape Of Minnesota Farming, Steven J. Taff
Journal of the Minnesota Academy of Science
The future development of Minnesota agriculture will be strongly influenced by new technologies and government policies that will alter prices for farm inputs and outputs. While some farm operations will fail under most expected price regimes, a loss of farmers will probably not have a significant impact on overall farm production. However, the new technologies and government policies could shift Minnesota farming into either a more intensive (less land, higher yield) or more extensive (more land, lower yield) mode of operation. A shift either way will have important implications for Minnesotans. Ownership and residence patterns, ground water quality, habitat and …
Global Agricultural Trade Negotiations And Their Potential Impact On Minnesota, Mark Ritchie
Global Agricultural Trade Negotiations And Their Potential Impact On Minnesota, Mark Ritchie
Journal of the Minnesota Academy of Science
The two main factors determining the financial well-being of our family farmers, market prices and government payments, are primarily established by Congress through federal legislation, commonly called the Farm Bill. Although these two factors are likely to remain the main economic ingredients in Minnesota's farm economy for the foreseeable future, the political control over these issues appears to be shifting out of the hands of Congress and into the hands of our international trade negotiators. For the very first time, all price support, income subsidy, and supply management programs are on the table for alteration or elimination in this new …
Hexagenia Mayflies: Biological Monitors Of Water Quality In The Upper Mississippi River, Calvin R. Fremling
Hexagenia Mayflies: Biological Monitors Of Water Quality In The Upper Mississippi River, Calvin R. Fremling
Journal of the Minnesota Academy of Science
ABSTRACT-Analysis of Hexageniamayfiy distribution patterns has proven to be a simple, inexpensive method of monitoring water quality in the Upper Mississippi River. Burrowing Hexagenia nymphs live at the mudwater interface intimately associated with organically enriched sediments that have a strong affinity for contaminants. By their presence or absence in silted habitats, they assess the synergistic effects of hypoxia, toxins, and other stresses throughout the year. Adults are large and easily collected, providing inexpensive water quality monitoring on a river so large that comprehensive chemical, physical, and biological analyses are not logistically feasible or affordable. Pollution abatement in metropolitan Minneapolis-St. Paul …
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.
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., …
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.
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 …
Iowa Geology: The Early Years, Wayne I. Anderson
Iowa Geology: The Early Years, Wayne I. Anderson
Journal of the Iowa Academy of Science: JIAS
In 1975 on the occasion of the first one hundred years of the Iowa Academy of Science, Robert W. Hanson summarized the history of the organization. Additional historical accounts covering many of the science disciplines were published during the centennial year. Although geology was not treated separately in these special articles, the contributions of early geologists were important to the development of science in our state. Consequently, it is appropriate to consider the contributions of early geologists in Iowa in celebration of the one hundredth annual meeting of the Iowa Academy of Science. Included in the present report are the …
Annual Report Of The Iowa Academy Of Science, 1988-89, Paul E. Rider
Annual Report Of The Iowa Academy Of Science, 1988-89, 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, 1988 to June 30, 1989. 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, who is writing his first annual report.
Estimates Of Genetic Variability In F2 Maize Populations, Geng-Chen Han, A. R. Hallauer
Estimates Of Genetic Variability In F2 Maize Populations, Geng-Chen Han, A. R. Hallauer
Journal of the Iowa Academy of Science: JIAS
Maize (Zea mays L.) breeders emphasize selection within F2 populations derived from crosses of inbred lines: Studies of the inheritance of quantitative traits in maize have been conducted primarily for generically broad-based populations. Objectives of our study were to estimate the generic variability in F2 populations developed from crosses of related and unrelated lines and to determine the effects of five generations of random intermating of plants within F2 populations on the estimates of genetic variability. Estimates of additive genetic variability were greater in the unrelated line crosses, but the estimates were not significantly different before and …
Characterization Of Aminoisobutyric Acid Transport Systems In Mcf-8, A Line Of Malignant Mouse Mammary Epithelial Cells, Bruce A. Voyles
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 …
Nesting Of Raptors Uncommon In Iowa: Summary And New Records, Dean M. Roosa, Jon Stravers
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
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.