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Reconsidering Relationships among Stem and Crown Group Pinaceae: Oldest Record of the Genus Pinus from the Early Cretaceous of Yorkshire, United Kingdom

Creator:: Ryberg, Patricia E., Rothwell, Gar W., Stockey, Ruth A., Hilton, Jason, Mapes, Gene, and Riding, James B.
Abstract:: This study describes a specimen that extends the oldest fossil evidence of Pinus L. to the Early Cretaceous Wealden Formation of Yorkshire, UK (131-129 million years ago), and prompts a critical reevaluation of criteria that are employed to identify crown group genera of Pinaceae from anatomically preserved seed cones. The...
Resource Type:: Article
Full Text:: CRETACEOUS OF YORKSHIRE, UNITED KINGDOM Patricia E. Ryberg,* Gar W. Rothwell,1,y,z Ruth A. Stockey,y,§ Jason

Collision processes of high Ryberg states in atomic lithium

Creator:: Shepard, Chester L.
Resource Type:: Dissertation
Full Text:: Collision processes of high Ryberg states in atomic

An ultrastructural study of early cleavage in Mytilus

Creator:: Elvin, Patricia J.
Abstract:: Ultrastructural analysis and chemical inhibition studies were carried out on first cleavage of Mytilus zygotes to determine possible relationships between the mitotic apparatus and the cortex during polar lobe formation. The stages of mitosis correlated with the appearance of the polar lobe were first determined by light microscopy. The polar...
Resource Type:: Masters Thesis
Full Text:: , 1972 Typed by Cheryl E. Curb for Patricia J. Elvin Redacted for Privacy Redacted for Privacy

The influence of attitudes about death on advance directive completion

Creator:: Srinivasan, Erica G.
Abstract:: Surveys of both patients and health care providers have indicated strong interest, up to 95%, in favor of advance directives, which are legal documents that express patients' healthcare treatment decisions. Despite the widespread support for advance directives, actual completion rates are very low, ranging from 4% to 20% for the...
Resource Type:: Masters Thesis
Full Text:: Influence of Attitudes about Death on Advance Directive Completion. Abstract Approved: Patricia Moran

Chaparral history, dynamics, and response to disturbance in southwest Oregon : insights from age structure

Creator:: Duren, Olivia
Abstract:: Fuels management on Bureau of Land Management lands in SW Oregon, USA, is motivated by the needs to reduce fire hazard and restore ecosystems thought to be impacted by fire suppression. Chaparral is one of the most characteristic vegetation communities of SW Oregon's interior valleys, and extensive acreages within this...
Resource Type:: Masters Thesis
Full Text:: : ___________________________________________________________________________________ Patricia S. Muir Fuels management on Bureau of Land Management lands in SW Oregon, USA

Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

Creator:: Clark, Darren A.
Abstract:: Mule deer (Odocoileus hemionus hemionus) and Rocky Mountain elk (Cervus canadensis nelsoni; hereafter elk) populations in northeast Oregon have declined in the past 10 to 20 years. Concurrent with these declines, cougar (Puma concolor) populations have apparently increased, leading to speculation that predation by cougars may be responsible for declining...
Resource Type:: Dissertation
Full Text:: Abstract approved: ________________________________________________________ Patricia L. Kennedy

The morphological events during the self-reassembly of the sea urchin embryo in culture

Creator:: Hamada, Spencer Hiroshi
Abstract:: The gastrula of the sea urchin Strongylocentrotus purpuratus was dissociated into single cells. In culture these cells appeared apolar, but reassembled into quasi-normal embryos composed of structures with polarized cells. In this study emphasis was placed on those morphological events coincident with the reestablishment of a polar orientation within the...
Resource Type:: Dissertation
Full Text:: SELF-REASSEMBLY OF THE SEA URCHIN EMBRYO IN CULTURE Redacted for Privacy Abstract approved Patricia

Influence of cover crop residue management on soil moisture, vine growth, and productivity in a pre-production vineyard in the Willamette Valley

Creator:: Curtis, Morgan A.
Abstract:: The use of cover crops in young vineyards is not widely accepted in the Pacific Northwest due to concerns of water and nutrient competition between the cover crop and vines. The last 2 years of a 4-year study started in 2009 are reported here. The study evaluated the use of...
Resource Type:: Masters Thesis
Full Text:: : ________________________________________________________________________ Patricia A. Skinkis The use of cover crops in young vineyards is not widely accepted in the

An evaluation of the invasion potential of Kochia prostrata (forage kochia) in southwestern Idaho, USA

Creator:: Gray, Erin C.
Abstract:: Purposeful introductions of exotic species for rehabilitation efforts following wildfire are common on rangelands in the western U.S., though potential ecological impacts of introduced species in novel environments are often poorly understood. One such introduced species, Kochia prostrata (L.) Schrad (forage kochia) has been seeded on over 200,000 ha throughout...
Resource Type:: Masters Thesis
Full Text:: approved: Patricia S. Muir Purposeful introductions of exotic species for rehabilitation

Invasion of Brachypodium sylvaticum in prairie and forest habitats : differences in community structure between uninvaded and invaded systems in Bald Hill Park, Corvallis, Oregon

Creator:: Goodell, Whitney
Abstract:: Brachypodium sylvaticum (Huds.) Beauv. is an invasive grass that can be found in forest and prairie communities throughout the Willamette Valley, Oregon. It can out-compete native species of grasses and forbs and become dominant in a broad range of habitats. This study investigated if there were differences in vegetation structure...
Resource Type:: Honors College Thesis
Full Text:: . Abstract approved: ____________________________________________________ Patricia Muir

ScholarsArchive@OSU

Reconsidering Relationships among Stem and Crown Group Pinaceae: Oldest Record of the Genus Pinus from the Early Cretaceous of Yorkshire, United Kingdom

Collision processes of high Ryberg states in atomic lithium

An ultrastructural study of early cleavage in Mytilus

The influence of attitudes about death on advance directive completion

Chaparral history, dynamics, and response to disturbance in southwest Oregon : insights from age structure

Implications of cougar prey selection and demography on population dynamics of elk in northeast Oregon

The morphological events during the self-reassembly of the sea urchin embryo in culture

Influence of cover crop residue management on soil moisture, vine growth, and productivity in a pre-production vineyard in the Willamette Valley

An evaluation of the invasion potential of Kochia prostrata (forage kochia) in southwestern Idaho, USA

Invasion of Brachypodium sylvaticum in prairie and forest habitats : differences in community structure between uninvaded and invaded systems in Bald Hill Park, Corvallis, Oregon

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