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Articles 2791 - 2820 of 3922
Full-Text Articles in Entire DC Network
Iowa Academy Of Science Membership Directory, 2003-2004, Iowa Academy Of Science
Iowa Academy Of Science Membership Directory, 2003-2004, Iowa Academy Of Science
Iowa Academy of Science Documents
Contents:
Editorial Board, Journal ... 4
Committees ... 6
Sections ... 14
ISTS Regional Directors ... 19
Awards of Merit ... 21
Excellence in Science Teaching Awards ... 22
Past Presidents ... 23
Membership Roster ... 24
Institutional Members ... 25
Corporate Sponsors ... 25
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
Digitization In An Archival Environment, Sally Mckay
Digitization In An Archival Environment, Sally Mckay
E-JASL: Electronic Journal of Academic and Special Librarianship (1999-2009, Volumes 1-10)
Introduction
Cultural institutions such as museums, libraries, archives, and historical societies house remarkable collections of cultural artifacts. It is the responsibility of the staff working for those institutions to preserve, protect and provide responsible stewardship for the materials, and to the best of their ability, provide continued long-term access (Russell, 2000).
Advances in technology allow institutions to provide expanded access and education; however, there are important priorities that must be addressed prior to embarking on a digital conversion project.
Digitization in an archival environment includes taking a physical object or analog item, such as an art object, a tape recording, …
Occurrence Of Ovotestes And Plasma Vitellogenin In Feral Male Fathead Minnows From Lagoons Of Municipal Wastewater Treatment Facilities In Central Iowa, Robert B. Bringolf, Robert C. Summerfelt
Occurrence Of Ovotestes And Plasma Vitellogenin In Feral Male Fathead Minnows From Lagoons Of Municipal Wastewater Treatment Facilities In Central Iowa, Robert B. Bringolf, Robert C. Summerfelt
Journal of the Iowa Academy of Science: JIAS
Since the early 1990s, endocrine disrupting compounds have been recognized as an important environmental threat. Male fish exposed to effluent from large, metropolitan municipal wastewater treatment facilities (WWTFs) have developed reproductive abnormalities including ovotestes and elevated levels of plasma vitellogenin (Vtg), a plasma protein typically produced by egg-laying females. In the summer of 2000, gonads and plasma Vtg concentrations were examined in feral male fathead minnows (Pimephales promelas) collected from lagoons of 11 small, rural municipal WWTFs and a reference site (a national wildlife refuge) in Iowa. Fathead minnows were captured in traps from five of the 33 lagoons (three …
Cathodoluminescence As A Means For Distinguishing Hydrothermal From Pre-Hydrothermal Quartz In Sulfide-Bearing Mineral Deposits On The Northern Fringe Of The Upper Mississippi Valley Zinc-Lead District, Ne Iowa And Sw Wisconsin, Paul L. Garvin
Journal of the Iowa Academy of Science: JIAS
Sulfide-bearing mineral deposits, located on the northern fringe of the Upper Mississippi Valley Zinc-Lead District, are contained in early Ordovician carbonate rocks that are extensively silicified and dolomitized. Some silica and dolomite appear to be products of the hydrothermal processes that also formed fracture-filling and cavity-lining sulfides and other cogenetic minerals; other silica and dolomite appear to result from low-temperature, pre-hydrothermal regional diagenesis. Distinguishing hydrothermal quartz (jasperoid) from pre-hydrothermal quartz (chert) solely by hand specimen and thin section petrography is difficult because these two types of mineralization are often intimately associated with each other. Polished slabs from several of these …
Salt Tolerance Of Sunflower And Lettuce In Cultivated And Uncultivated Grass Soil, Steven H. Emerman, Emily M. Kinsinger
Salt Tolerance Of Sunflower And Lettuce In Cultivated And Uncultivated Grass Soil, Steven H. Emerman, Emily M. Kinsinger
Journal of the Iowa Academy of Science: JIAS
We tested two hypotheses: 1) whether a vegetable crop will show greater growth under a given salinity treatment in an uncultivated grass soil than a cultivated soil and 2), if so, whether the greater growth is due to the occasional presence of relatively fresh water in macropores or the interaction between salinity and hypoxia in a soil without significant macropores. A previous study suggested uptake from. macropores was significant only for crops with high root water potential (Emerman and Dawson 1997). Hence, in this study, 21 miniature crops were grown in a greenhouse, and the ratio of root dry weight …
A Key To The Eggs And Nests Of Iowa Turtles, James L. Christiansen, Jeffrey R. Parmelee
A Key To The Eggs And Nests Of Iowa Turtles, James L. Christiansen, Jeffrey R. Parmelee
Journal of the Iowa Academy of Science: JIAS
Biologists often need to identify destroyed turtle nests where a predator has excavated and eaten the eggs. We present a dichotomous key to the eggs and nests of Iowa's turtles based on egg or nest morphology and known range of the species. Egg and nest morphology clearly separated most nests of the families Chelydridae and Kinosternidae and many of the Emydidae. However, egg morphology must be combined with known range to distinguish wood turtles (Glyptemys insculpta) from other emydids. These factors will also separate most false map turtles (Graptemys pseudogeographica) from other species. Similarities among egg morphologies, nest morphologies, and …
Submersed Aquatic Vegetation Trends In Impounded And Backwater Habitat Types Of Pool 13, Upper Mississippi River System: 1994-2000, Theresa A. Blackburn, Daniel J. Kirby
Submersed Aquatic Vegetation Trends In Impounded And Backwater Habitat Types Of Pool 13, Upper Mississippi River System: 1994-2000, Theresa A. Blackburn, Daniel J. Kirby
Journal of the Iowa Academy of Science: JIAS
Submersed aquatic vegetation (SAV) was sampled from 1994-2000 at fixed sires along established transects in Pool 13 of the Upper Mississippi River System (UMRS), as part of the Long Term Resource Monitoring Program (LTRMP). These data were used to quantify the annual percent frequency of occurrence and mean relative density of SAV within three backwaters (Brown's Lake, Savanna Bay, and Spring Lake) and the impounded area of Pool 13. This investigation used Spearman rank correlation to assess the strength of bivariate relationships between measurements of SAV abundance and biological, physical, and hydrological variables at fixed water quality monitoring sites within …
Cover - Table Of Contents
Journal of the Iowa Academy of Science: JIAS
No abstract provided.
An Assessment Of Water Quality In Ensign Hollow, Clayton And Fayette Counties, In Northeast Iowa, Rick Klann, Jaime Platts
An Assessment Of Water Quality In Ensign Hollow, Clayton And Fayette Counties, In Northeast Iowa, Rick Klann, Jaime Platts
Journal of the Iowa Academy of Science: JIAS
Water quality and benthic invertebrates in the Ensign Hollow watershed, southwestern Clayton County and southeastern Fayette County, Iowa, were monitored from 2000 to 2001. Measurements of physical and chemical parameters of water quality, as well as analysis of benthic invertebrates, all indicated that streams of the Ensign Hollow watershed were exposed to slight organic pollution. Furthermore, the greatest threat to this watershed appeared to be sedimentation introduced through runoff.
A Framework For Reproductive Models Of Mourning Doves, David L. Otis
A Framework For Reproductive Models Of Mourning Doves, David L. Otis
Journal of the Iowa Academy of Science: JIAS
Population models can be used to aid in development and evaluation of harvest management strategies for game species. No current models are available for the Mourning Dove (Zenaida macroura), which is considered a migratory game bird in 37 states. A predictive model for annual reproduction is a necessary component of such a model. I used a simple construct based on parameters of the Mourning Dove breeding cycle to develop probability distributions of annual per capita reproduction for each of five geographical regions in the U.S. Confidence intervals for model predictions included average estimates from published studies in all regions except …
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.
Recent Observations Of The Distribution And Status Of Freckled Madtom And First Record Of Spotted Gar In Iowa, Melvin C. Bowler
Recent Observations Of The Distribution And Status Of Freckled Madtom And First Record Of Spotted Gar In Iowa, Melvin C. Bowler
Journal of the Iowa Academy of Science: JIAS
The distribution and status of Iowa's fishes were last extensively described in Iowa Fish and Fishing (Harlan et al. 1987). Since then, numerous fish collections have been made in Iowa's interior and bordering rivers and streams. In this paper, I describe recent collections of freckled mad tom (Noturus nocturnus) and spotted gar (Lepisosteus oculatus) from the Upper Mississippi. River (UMR). Six specimens of N. nocturnus were collected from Pool 13 of the UMR in 2001. Although the first documented specimens of N. nocturnus in Iowa were collected in the English River in 1984, few collections have been made throughout the …
Iowa Academy Of Science 115th Annual Meeting [2003]: Advance Program, Iowa Academy Of Science
Iowa Academy Of Science 115th Annual Meeting [2003]: Advance Program, Iowa Academy Of Science
Iowa Academy of Science Documents
Contains information about the schedule and presentations for the 2003 annual meeting of the Iowa Academy of Science.
Iowa Academy Of Science 115th Annual Meeting [Program, 2003], Iowa Academy Of Science
Iowa Academy Of Science 115th Annual Meeting [Program, 2003], Iowa Academy Of Science
Iowa Academy of Science Documents
Contents:
Program Summary --- 2
General Session Speakers --- 4
Symposia Programs --- 7
Special Panel --- 9
Awards --- 10
Section Programs/Special Sessions/Abstracts --- 11
Agricultural Science (poster) --- 12
Anthropology --- 13
Botany --- 16
Cellular, Molecular & Microbiology and Physiology --- 20
Chemistry: Inorganic, Analytical & Physical --- 23
Chemistry: Organic & Biological --- 23
Conservation --- 25
Engineering --- 29
Environmental Science and Health --- 35
Geology --- 37
Physics --- 41
Physiology (posters) --- 44
Zoology --- 46
Mussel Symposia --- 52
Energy Symposia --- 56
IAS Officers & Directors --- 59
IAS Annual Meeting …
Table Of Contents
Journal of the South Carolina Academy of Science
No abstract provided.
Restoration And Monitoring Of The River Otter Population In Iowa, J. A. Pitt, W. R. Clark, R. D. Andrews, K. P. Schlarbaum, D. D. Hoffman, S. W. Pitt
Restoration And Monitoring Of The River Otter Population In Iowa, J. A. Pitt, W. R. Clark, R. D. Andrews, K. P. Schlarbaum, D. D. Hoffman, S. W. Pitt
Journal of the Iowa Academy of Science: JIAS
Northern river otters (Lontra canadensis) were widespread in North America at the time of European settlement. However, river otters were extirpated from most of Iowa in the early 1900s due to habitat degradation and unregulated harvest. In 1985, the Iowa Department of Natural Resources began an effort to restore the river otter population throughout the state, including a pilot study of survival to determine if establishment was feasible. Annual survival was estimated to be 86% during the pilot study. River otters dispersed an average of about 11 km from the point of release and exhibited habitat use typical for the …
The Influence Of Soil Water Content, Calcite Content, And Temperature On Bulk Electrical Conductivity, Eric C. Brevik, Jaehoon Lee, Thomas E. Fenton, Robert Horton
The Influence Of Soil Water Content, Calcite Content, And Temperature On Bulk Electrical Conductivity, Eric C. Brevik, Jaehoon Lee, Thomas E. Fenton, Robert Horton
Journal of the Iowa Academy of Science: JIAS
Electrical conductivity (EC) as measured by the Geonics® EM-38 has shown promise as a soil survey tool. EC is determined by a combination of soluble salts, clay content and mineralogy, water content, and temperature. While investigating use of the EM-38 for soil survey purposes, it is important to understand the relative contribution of each of these variables on EC. A laboratory experiment was set up to determine the relative influence of water content, temperature, and calcite content on EC using time-domain reflectometry (TDR) probes. TDR was used as a proxy for the EM-38 because of the large volume of soil …
Solid-Phase Dna Sequencing Reactions Performed In Micro-Capillary Reactors And Solid-Phase Reversible Immobilization In Microfluidic Chips For Purification Of Dye-Labeled Dna Sequencing Fragments, Yichuan Xu
LSU Doctoral Dissertations
The research presented in this dissertation involves micro-capillary reactors for solid phase DNA sequencing, the identification of dye terminator sequencing fragments with time-resolved methods, and purification of dye-labeled DNA fragments using solid- phase reversible immobilization in microfluidic chips. Solid-phase micro-reactors have been prepared for DNA sequencing applications using slab gel electrophoresis. A PCR product was immobilized to the interior wall of a fused-silica capillary tube via a biotin-streptavidin linkage. Solid-phase sequencing was carried out in micro-capillary reactors using a four-lane, single color dye primer chemistry strategy. The read length was found to be 589 bases. The complementary DNA fragments generated …
Crab Louse Infestation In Pre-Columbian America, F. M. Rick, G. C. Rocha, K. Dittmar, C. E. A. Coimbra Jr., Karl J. Reinhard, F. Bouchet, L. F. Ferreira, A. Araújo
Crab Louse Infestation In Pre-Columbian America, F. M. Rick, G. C. Rocha, K. Dittmar, C. E. A. Coimbra Jr., Karl J. Reinhard, F. Bouchet, L. F. Ferreira, A. Araújo
School of Natural Resources: Faculty Publications
Until now, Pthirus pubis infestation in ancient human populations had only been recorded in the Old World. We found crab lice on South American mummified bodies from the Atacama Desert region. Crab louse eggs were found attached to the pubic hairs of a 2,000-yr-old Chilean mummy. Well-preserved adults were found in sediment and clothing from a Peruvian mummy dated 1,000 yr ago. Paleoparasitological evidence expands the knowledge of the distribution of this ectoparasite in ancient populations. As with many other parasites, pubic lice recorded in Andean populations show the antiquity of this parasite in the New World. It is likely …
Acknowledgements, The Mcnair Team
Acknowledgements, The Mcnair Team
McNair Scholars Research Journal
No abstract provided.
News From Cart, Michael A. Krol, Julia Stakhnevich
News From Cart, Michael A. Krol, Julia Stakhnevich
Bridgewater Review
No abstract provided.
Student Fact Book, Fall 2002, Wright State University Lake Campus, Office Of Student Information Systems, Wright State University
Student Fact Book, Fall 2002, Wright State University Lake Campus, Office Of Student Information Systems, Wright State University
Wright State University Student Fact Books
The student fact book has general demographic information on all students enrolled at Wright State University Lake Campus for Fall Quarter, 2002.
Student Fact Book, Fall 2002, Twenty-Sixth Annual Edition, Wright State University, Office Of Student Information Systems, Wright State University
Student Fact Book, Fall 2002, Twenty-Sixth Annual Edition, Wright State University, Office Of Student Information Systems, Wright State University
Wright State University Student Fact Books
The student fact book has general demographic information on all students enrolled at Wright State University for Fall Quarter, 2002.
Arts And Sciences Newsletter, Volume 6, Issue 2, College Of Arts & Sciences
Arts And Sciences Newsletter, Volume 6, Issue 2, College Of Arts & Sciences
Arts and Sciences Newsletters
No abstract provided.
Liberal Arts - Fall 2002, University Of Mississippi. College Of Liberal Arts
Liberal Arts - Fall 2002, University Of Mississippi. College Of Liberal Arts
Liberal Arts Newsletters
First fellowship recipients represent psychology, chemistry, English