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Articles 3211 - 3240 of 3921
Full-Text Articles in Entire DC Network
Carnivorous Spadefoot (Spea Bombifrons Cope) Tadpoles And Fairy Shrimp In Western Iowa, Eugenia S. Farrar, Jane D. Hey
Carnivorous Spadefoot (Spea Bombifrons Cope) Tadpoles And Fairy Shrimp In Western Iowa, Eugenia S. Farrar, Jane D. Hey
Journal of the Iowa Academy of Science: JIAS
Amphibian larval polymorphisms, rarely found in the Midwest, are more common in arid western regions. We have discovered that Plains spadefoot toad, Spea bombifrons Cope, tadpoles occur as carnivorous and omnivorous morphological forms in flooded soybean and corn fields on the Missouri River flood plain of western Iowa. Carnivores have longer snouts, larger beaks with an upper cusp and lower notch, shorter intestines with fewer loops than the omnivores, and they feed on fairy shrimp. A similar polymorphism in Spea multiplicata Cope enhances survival in the desert because the carnivore develops faster after consuming fairy shrimp and is able to …
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Iowa's State Parks: A Various Language, Rebecca Conard
Iowa's State Parks: A Various Language, Rebecca Conard
Journal of the Iowa Academy of Science: JIAS
Iowa's state park system is distinctive because academically based natural scientists were instrumental in drafting the 1917 State Park Law, in shaping the initial policies, and in establishing the first parks. The mandate of the 1917 law was broad, but its original intent was to preserve and conserve natural resources; providing recreational enjoyment was secondary. Between 1920 and mid-century the founding vision was recast time and again by compromises that sprang from economic necessity, competing interests, and changing societal values. The ideal of resource protection has remained a guiding principle, however, in large part because strong personalities provided continuity of …
Cover - Table Of Contents
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.
Additions To The Pteridophyte Flora Of Iowa-Iv, James H. Peck, Jeffrey C. Nekola, William Thomas
Additions To The Pteridophyte Flora Of Iowa-Iv, James H. Peck, Jeffrey C. Nekola, William Thomas
Journal of the Iowa Academy of Science: JIAS
This report updates field collection records and summarizes nomenclatural changes of genera and binomials of species of Iowa pteridophytes based on the Flora of North America project. Botrychium simplex var. compositum, Gymnocarpium jessoense (Koidz.) Koidz. spp. parvulum Sarvela, Gymnocarpium Xhrittonianum (Sarvela) Pryer & Haufler, and Gymnocarpium Xintermedium Sarvela were recently added to the state flora. The flora now consists of 66 species, plus 7 hybrids, and 1 distinct form, for a total of 74 taxa. With the addition of 81 new county occurrence records, the Iowa pteridophyte flora now consists of 1754 county occurrence records. A data matrix of species/county …
Midwestern Geology And Cornell College: The First 125 Years, Gene E. Hinman, Paul L. Garvin
Midwestern Geology And Cornell College: The First 125 Years, Gene E. Hinman, Paul L. Garvin
Journal of the Iowa Academy of Science: JIAS
The history of geology at Cornell College can be traced back almost to the college's beginnings. Though not the first to reach geology at Cornell, William Harmon Norton, more than any other person, shaped the Department of Geology and set it on its course of excellence. Born in 1856, the son of a Methodist minister, Norton developed an ardent interest in geology in his boyhood. A graduate of Cornell in Classics, Norton was hired by his alma mater in 1876 to reach Greek, bur his avocation was geology. He spent most of his spare time on weekends and during summers …
Book Review - The End Of Science: Facing The Limits Of Knowledge, David Lopatto
Book Review - The End Of Science: Facing The Limits Of Knowledge, David Lopatto
Journal of the Iowa Academy of Science: JIAS
The June, 1997 issue of Harper's Magazine included a list of recently published books that have titles beginning with "The End of". There are thirty-one titles on the list. Publishers have been rushing to cash in on the public's emotional reaction to the coming end of the century. It is difficult to take some of these works seriously. Perhaps the hardest thesis to swallow is that science, including physics, chemistry, biology, and neuroscience, not to mention the social sciences and the philosophy of science, is coming to an end just as our somewhat arbitrary calendar ticks over to a new …
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
A Search For Average, Extremes, And Runs Of Unusual Weather In Iowa, R. E. Carlson, D. P. Todey
A Search For Average, Extremes, And Runs Of Unusual Weather In Iowa, R. E. Carlson, D. P. Todey
Journal of the Iowa Academy of Science: JIAS
Temperature and precipitation during the past decade have exhibited wide variation throughout Iowa. Is this unusual? An attempt was made to answer this question by computing various statistical parameters that characterize variation in Iowa's long term climatic record. Absolute deviations were used to identify the most and least variable months and years since 1900. Overall, 1936 with a very cold winter and very warm summer was the least normal year. Runs of daily weather showed that heat and cold stress could often persist for more than 1 month. Runs of dry days were much longer than runs of wet days. …
Hot-Packaging Reduces Lipid Oxidation And Improves Sensory Characteristics Of Cooked Turkey Meat, Maiko Ishikawa, Dong U. Ahn
Hot-Packaging Reduces Lipid Oxidation And Improves Sensory Characteristics Of Cooked Turkey Meat, Maiko Ishikawa, Dong U. Ahn
Journal of the Iowa Academy of Science: JIAS
The effects of two vacuum packaging methods (hot and cold vacuum packaging) on the storage stability and sensory characteristics of cooked meat were compared. Ground turkey breast and leg meat patties were cooked, vacuum packaged appropriately, and stored up to 22 days. Lipid oxidation was measured by the thiobarbituric acid (TBA) test. In addition, Total aerobic count and sensory evaluation (flavor, juiciness, tenderness, overall acceptability) were conducted. There was no significant difference in aerobic plate count by packaging methods; however, panelist rating revealed that hot-packaged turkey leg meat had higher juiciness and overall acceptability scores than cold-packaged ones. Although TBARS …
Helminth Ova Recovered From Raptors Admitted For Rehabilitation, Shawn Hawks, Rick Klann
Helminth Ova Recovered From Raptors Admitted For Rehabilitation, Shawn Hawks, Rick Klann
Journal of the Iowa Academy of Science: JIAS
Fecal samples from 34 raptors admitted for rehabilitation were examined for helminth ova. All 34 birds, representing 13 different species, passed helminth ova in their feces. Six different types of helminth ova were identified, including strigeid trematode, cestode, Capillaria, Porrocaecum, Ascaridia and spiurid nematode. From this study, it appears that helminths, particularly tapeworms, are common parasites of raptors.
The Contributions Of J. A. Udden To An Understanding Of Iowa Geology, Richard C. Anderson
The Contributions Of J. A. Udden To An Understanding Of Iowa Geology, Richard C. Anderson
Journal of the Iowa Academy of Science: JIAS
Johan August Udden served on the faculty of Augustana College from 1888 until 1911. His research during that time was directed toward an understanding of the geology of areas close at hand, the region around Rock Island and nearby areas in Iowa and Illinois. Udden's most significant contributions to Iowa geology were in his treatment of 1) Paleozoic, Cretaceous, and Quaternary stratigraphy; 2) subsurface geology, including information on bedrock elevations and topography; 3) characteristics and origin of the loess. Most of this information was included in the Annual Reports of the Iowa Geological Survey published between 1899 and 1903. He …
Awards And Recognition, Iowa Academy Of Science, 1997
Awards And Recognition, Iowa Academy Of Science, 1997
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Report To The Roger L. Kresge Foundation, December 27, 1997 : Understanding Refugee Communities In Broome County, Mi̇Hri̇ İNal. ÇAkir, Michael M. Horowitz, Institute For Development Anthropology (Binghamton, N.Y.)
Report To The Roger L. Kresge Foundation, December 27, 1997 : Understanding Refugee Communities In Broome County, Mi̇Hri̇ İNal. ÇAkir, Michael M. Horowitz, Institute For Development Anthropology (Binghamton, N.Y.)
Institute for Development Anthropology Papers
No abstract provided.
Book Review - Lost Landscapes And Failed Economies, Tom Vetter
Book Review - Lost Landscapes And Failed Economies, Tom Vetter
Journal of the Iowa Academy of Science: JIAS
In an intensive and methodical manner, Power casts doubt upon notions of environmental protection choking economic development. He demonstrates the fallacy of such a position and successfully advocates environmental protection as economically sound. The confusion that exists between the environment and the economy is largely the result of misguided convention.
Nesting Status Of The Cooper's Hawk In Iowa: 1988-1996, David. J. Conrads
Nesting Status Of The Cooper's Hawk In Iowa: 1988-1996, David. J. Conrads
Journal of the Iowa Academy of Science: JIAS
The Cooper's Hawk was once considered a common nesting species in Iowa. Organochlorine pesticides and their residues, along with habitat loss contributed to its decline throughout the Midwest after the 1940's. This species was classified as endangered in Iowa in 1984, but recent trends in nests found indicate that the population of these hawks has increased. Since April 1988, 53 nests have been discovered in Iowa. Due to the apparent population growth, this species was removed from Iowa's endangered species list in 1994.
Restoration Of An Urban Salt Marsh: An Interdisciplinary Approach, David G. Casagrande
Restoration Of An Urban Salt Marsh: An Interdisciplinary Approach, David G. Casagrande
Yale School of the Environment Bulletin Series
No abstract provided.
Walking Thoughts, Hunter R. Rawlings Iii
Walking Thoughts, Hunter R. Rawlings Iii
Journal of the Iowa Academy of Science: JIAS
I've borrowed my title from a poem by Marvin Bell, a member of our Writers' Workshop, because I cannot think of state parks without thinking of my love for their hiking trails and the expansion of spirit they have brought me. State parks are more than nature preserves, more than recreational areas, though these functions are very important. They are also cultural and even spiritual resources, centers of emotional and psychic renewal.
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.
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.
Acknowledgements, The Mcnair Team
Acknowledgements, The Mcnair Team
McNair Scholars Research Journal
No abstract provided.
Full Issue, The Mcnair Team