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Open Access. Powered by Scholars. Published by Universities.®

Biology

Wright State University

2008

Articles 1 - 3 of 3

Full-Text Articles in Medicine and Health Sciences

Neuroendocrine Peptides Neuropeptide-Y (Npy) And Peptide-Yy (Pyy) Suppress Cl- Secretion And K+ Secretion In Guinea Pig Distal Colon Through Action At Y2-Receptors, Susan T. Halm, Jin Zhang, Dan R. Halm Nov 2008

Neuroendocrine Peptides Neuropeptide-Y (Npy) And Peptide-Yy (Pyy) Suppress Cl- Secretion And K+ Secretion In Guinea Pig Distal Colon Through Action At Y2-Receptors, Susan T. Halm, Jin Zhang, Dan R. Halm

Neuroscience, Cell Biology & Physiology Faculty Publications

Electrogenic Cl– and K+ secretion in isolated mucosa from guinea pig distal colon measured as short-circuit current (Isc) and transepithelial conductance (Gt) were stimulated by epinephrine (epi), prostaglandin-E2 (PGE2) and carbachol (CCh). neuropeptide-Y (NPY) and peptide-YY (PYY) inhibited by 60% Cl– secretion activated by either PGE2 or PGE2+CCh with EC50’s of 16nM and 6nM, respectively. Neither peptide markedly inhibited the transient component of the PGE2+CCh response. Immunoreactivity (IR) for NPY was present in enteric ganglia and in proximity with crypts. Basolateral membranes of …

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Emerging Issues In Forensic Dna Profiling: Databases And Advisory Boards, Dan E. Krane Sep 2008

Emerging Issues In Forensic Dna Profiling: Databases And Advisory Boards, Dan E. Krane

Biological Sciences Faculty Publications

No abstract provided.

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Shifts In Southern Wisconsin Forest Canopy And Understory Richness, Composition, And Heterogeneity, David A. Rogers, Thomas P. Rooney, Daniel Olson, Donald M. Waller Sep 2008

Shifts In Southern Wisconsin Forest Canopy And Understory Richness, Composition, And Heterogeneity, David A. Rogers, Thomas P. Rooney, Daniel Olson, Donald M. Waller

Biological Sciences Faculty Publications

We resurveyed the under- and overstory species composition of 94 upland forest stands in southern Wisconsin in 2002–2004 to assess shifts in canopy and understory richness, composition, and heterogeneity relative to the original surveys in 1949–1950. The canopy has shifted from mostly oaks (Quercus spp.) toward more mesic and shade-tolerant trees (primarily Acer spp.). Oak-dominated early-successional stands and those on coarse, nutrient-poor soils changed the most in canopy composition. Understories at most sites (80%) lost native species, with mean species density declining 25% at the 1-m2 scale and 23.1% at the 20-m2 scale. Woody species have increased …

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