Ohio Journal of Science: Volume 110, Issue 5 (December, 2010)

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https://kb.osu.edu/handle/1811/52092

Front Matter
pp. 0
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Observations of Pitcher Plant (Sarracenia purpurea L.) Phytotelm Conditions from Two Populations in Jackson Bog, Stark County, OH
Hamilton, Robert IV pp. 98-103
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Water Resources and Wastewater Reuse: Perceptions of Students at The Ohio State University Campus
Vedachalam, Sridhar; Mancl, Karen M. pp. 104-113
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Influence of Perinatal Exposure to a Polychlorinated Biphenyl Mixture on Learning and Memory, Hippocampal Size, and Estrogen Receptor-Beta Expression
Desai, Avanti N.; McFarland, Ashley; Cromwell, Howard Casey; Meserve, Lee A. pp. 114-119
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Book Review
pp. 120
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Obituaries
pp. 121-132
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Back Matter
pp. 999
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Now showing 1 - 7 of 7

Observations of Pitcher Plant (Sarracenia purpurea L.) Phytotelm Conditions from Two Populations in Jackson Bog, Stark County, OH
(2010-12) Hamilton, Robert IV
The physical and chemical characteristics of pitcher plant leaf fluid, or phytotelm, influence the phytotelm inhabitants, which in turn affect plant fitness. Phytotelm conditions vary between seasons yet few studies sample in multiple seasons or during the winter in portions of the plant’s range where winter freezing normally occurs. Phytotelm conditions were characterized in two populations of Sarracenia purpurea L. in Jackson Bog State Nature Preserve, Jackson Township, Stark County, OH. Twenty leaves were arbitrarily sampled from each population once every ten days from November 2008 to September 2009. Phytotelm characteristics were compared between populations and with bog water adjacent to each population. Temperatures significantly differed between seasons, between pitcher plant populations and between the phytotelm and adjacent bog water. pH significantly differed between seasons and between pitcher plant populations, but not between the phytotelm and the adjacent bog water. Phytotelm volume and the number of frozen and dry leaves differed between populations. Results suggest that the presence and duration of non-frozen fluid could be an important source of selection on phytotelm inhabitants. Differences in phytotelm conditions between populations suggest that sampling regimes in sites with multiple populations or one very large population should account for microhabitat variations.
Water Resources and Wastewater Reuse: Perceptions of Students at The Ohio State University Campus
(2010-12) Vedachalam, Sridhar; Mancl, Karen M.
As global population increases and more people achieve higher standards of living, the availability of freshwater across the world may be threatened in the coming decades. Reuse of wastewater is seen as one of the many solutions that can reduce the need for freshwater and lead to long-term sustainability. However, the concept of wastewater reuse does not elicit unconditional public support. Universities worldwide have taken the lead in creating water management programs for their local watersheds. Students at the main campus of The Ohio State University were surveyed for their opinions on water resources and wastewater reuse using an online questionnaire. Results indicate weak awareness of facts and practices regarding water usage and quality, but strong support for implementing a wastewater reuse program in the region. Level of contact with the treated wastewater and familiarity with the institution undertaking the wastewater reuse program have strong impacts on perceptions of the processed wastewater quality. This is important for institutions that serve public needs and depend on consumer trust to promote new and innovative environmental initiatives. Water management programs involving wastewater reuse could be an effective method to reduce the risks in scenarios which project potential water shortages in urban areas during the coming decades.
Influence of Perinatal Exposure to a Polychlorinated Biphenyl Mixture on Learning and Memory, Hippocampal Size, and Estrogen Receptor-Beta Expression
(2010-12) Desai, Avanti N.; McFarland, Ashley; Cromwell, Howard Casey; Meserve, Lee A.
Perinatal exposure to PCB has been reported to cause a variety of health effects including endocrine disruption, and immunologic, reproductive, neurologic, and behavioral deficits. In the present study, a mixture of two PCB congeners, one noncoplanar (PCB 47) and one coplanar (PCB 77), were administered to young female Sprague-Dawley rats by route of maternal dietary consumption (either 12.5 ppm or 25.0 ppm, w/w). Impact on learning and memory were examined by radial arm maze on postnatal day 24-27. After behavioral tests were completed, the rats were transcardially perfused, and brains were excised. Immunohistochemistry for ER- β was carried out on free-floating sections. Sections were stained with cresyl violet stain, and hippocampal area was measured. A subjective comparison of staining density suggested a greater intensity of ER- β staining in female rat hippocampus exposed to PCB 47/77 at 25 ppm concentration. A decrease in the hippocampal area measurement was observed in the case of 25 ppm PCB exposed rats. Significant behavioral effects involving spatial learning and memory were not observed. However, animals exposed to PCB 47/77 at 25 ppm displayed a trend toward improved performance. Taken together, the combination in PCB exposed rats of reduced hippocampal size, increased ER-β concentration, and unaltered behavior suggests the existence of compensatory mechanisms in the animals.
Book Review
(2010-12)
Obituaries
(2010-12)
Back Matter
(2010-12)
Front Matter
(2010-12)

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