Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16874
Water quality and quantity and simulated surface-water and groundwater flow in the Laurel Hill Creek Basin, southwestern Pennsylvania, 1991–2007 Water quality and quantity and simulated surface-water and groundwater flow in the Laurel Hill Creek Basin, southwestern Pennsylvania, 1991–2007
Laurel Hill Creek is considered one of the most pristine waterways in southwestern Pennsylvania and has high recreational value as a high-quality cold-water fishery; however, the upper parts of the basin have documented water-quality impairments. Groundwater and surface water are withdrawn for public water supply and the basin has been identified as a Critical Water Planning Area (CWPA)...
Authors
Daniel G. Galeone, Dennis W. Risser, Lee W. Eicholtz, Scott A. Hoffman
Acquisition of Borrelia burgdorferi infection by larval Ixodes scapularis (Acari: Ixodidae) associated with engorgement measures Acquisition of Borrelia burgdorferi infection by larval Ixodes scapularis (Acari: Ixodidae) associated with engorgement measures
Measuring rates of acquisition of the Lyme disease pathogen, Borrelia burgdorferi sensu lato Johnson, Schmid, Hyde, Steigerwalt & Brenner, by the larval stage of Ixodes scapularis Say is a useful tool for xenodiagnoses of B. burgdorferi in vertebrate hosts. In the nymphal and adult stages of I. scapularis, the duration of attachment to hosts has been shown to predict both body...
Authors
Janelle Couret, M.C. Dyer, T.N. Mather, S. Han, J.I. Tsao, R.A. LeBrun, Howard S. Ginsberg
Cambrian origin of the CYP27C1-mediated vitamin A1-to-A2 switch, a key mechanism of vertebrate sensory plasticity Cambrian origin of the CYP27C1-mediated vitamin A1-to-A2 switch, a key mechanism of vertebrate sensory plasticity
The spectral composition of ambient light varies across both space and time. Many species of jawed vertebrates adapt to this variation by tuning the sensitivity of their photoreceptors via the expression of CYP27C1, an enzyme that converts vitamin A1 into vitamin A2, thereby shifting the ratio of vitamin A1-based rhodopsin to red-shifted vitamin A2-based porphyropsin in the eye. Here, we...
Authors
Ala Morshedian, Matthew B. Toomery, Gabriel E. Pollock, Rikard Frederiksen, Jennifer Enright, Stephen D. McCormick, M. Carter Cornwall, Gordon L. Fain, Joseph C. Corbo
Fifty-eighth supplement to the American Ornithologists' Union: Check-list of North American Birds Fifty-eighth supplement to the American Ornithologists' Union: Check-list of North American Birds
This is the 17th supplement since publication of the 7th edition of the Check-list of North American Birds (American Ornithologists' Union [AOU] 1998). It summarizes decisions made between April 15, 2016, and April 15, 2017, by the AOS's Committee on Classification and Nomenclature—North and Middle America. The Committee has continued to operate in the manner outlined in the 42nd...
Authors
Terry Chesser, Kevin J Burns, Carla Cicero, Jon L. Dunn, Andrew W. Kratter, Irby J. Lovette, Pamela C. Rasmussen, J.V. Remsen, James D. Rising, Douglas F. Stotz, Kevin Winker
Titanium and titanium minerals Titanium and titanium minerals
No abstract available.
Authors
George M. Bedinger