Index Catalog // ScholarsArchive@OSU

X-ray computed tomography of wood-adhesive bondlines: attenuation and phase-contrast effects

Creator:: Paris, Jesse L., Kamke, Frederick A., and Xiao, Xianghui
Abstract:: Microscale X-ray computed tomography (XCT) is discussed as a technique for identifying 3D adhesive distribution in wood-adhesive bondlines. Visualization and material segmentation of the adhesives from the surrounding cellular structures require sufficient gray-scale contrast in the reconstructed XCT data. Commercial wood-adhesive polymers have similar chemical characteristics and density to wood...
Resource Type:: Article
Full Text:: L. Paris jesse.paris@wilvaco.com Frederick A. Kamke fred.kamke@oregonstate.edu 1 Department of

Potential for Using Essential Oils to Protect Viscoelastic Thermal Compression–Treated Hybrid Poplar

Creator:: Scouse, Adam, Kamke, Frederick A., and Morrell, Jeffrey J.
Abstract:: The potential for using pretreatment with cinnamon leaf oil or juniper foliage oil to improve the durability of viscoelastic thermal compression (VTC)–treated hybrid poplar was explored in a field termite test and a laboratory mold test. The addition of oils prior to VTC processing had variable effects on resistance to...
Resource Type:: Article
Full Text:: Viscoelastic Thermal Compression–Treated Hybrid Poplar Adam Scouse Frederick A. Kamke Jeffrey J. Morrell

Influence of the thermo-hydro-mechanical treatments of wood on the performance against wood degrading fungi

Creator:: Lesar, Bostjan, Humar, Miha, Kamke, Frederick A., and Kutnar, Andreja
Abstract:: Hybrid poplar (Populus deltoides × Populus trichocarpa) and Douglas-fir (Pseudotsuga menziesii) wood specimens were densified with three variations of Thermo-Hydro-Mechanical (THM) treatment. The THM treatments differed in the steam environment, including transient steam (TS), saturated steam (SS), and saturated steam with 1 minute post-heat-treatment at 200°C (SS+PHT). The bending properties,...
Resource Type:: Article
Full Text:: , Frederick A. Kamke b , Andreja Kutnar c * a University of Ljubljana, Biotechnical Faculty

Phenol formaldehyde adhesives formulated for advanced x-ray imaging in wood-composite bondlines

Creator:: Paris, Jesse L., Kamke, Frederick A., Mbachu, Reginald, and Gibson, Sara Kraushaar
Abstract:: A phenol formaldehyde (PF) adhesive was uniformly tagged with iodine such that it yielded sufficient x-ray computed tomography (XCT) gray-scale contrast for material segmentation in reconstructed wood-composite bondlines. Typically, untagged adhesives are organic and have a similar solid state density as wood cell-walls, and therefore cannot be segmented quantitatively in...
Resource Type:: Article
Full Text:: ,* , Frederick A. Kamke a,† , Reginald Mbachu b , Sara Kraushaar Gibson b a Department of Wood Science

Microstructure of viscoelastic thermal compressed (VTC) wood using computed microtomography

Creator:: Standfest, Gernot, Kutnar, Andreja, Plank, Bernhard, Petutschnigg, Alexander, Kamke, Frederick A., and Dunky, Manfred
Abstract:: The paper describes for the first time the analysis of the structure of compressed wood using computed tomography. The anatomical structures of Douglas-fir and hybrid poplar before and after densification with the Viscoelastic Thermal Compression (VTC) process were described by pore size distributions and mean pore sizes and compared. The...
Resource Type:: Article
Full Text:: *, Andreja Kutnar, Bernhard Plank, Alexander Petutschnigg, Frederick A. Kamke, Manfred Dunky Gernot

Data from: Methodology for comparing wood adhesive bond load transfer using digital volume correlation

Creator:: Ching, Daniel J., McKinley, Paige E., Kamke, Fred A., Zauner, Michaela, and Xiao, Xianghui
Abstract:: There is a lack of fundamental knowledge about the role which adhesive flow and infiltration plays in the micro-mechanical performance of wood adhesive bonds. This data set, for the first time, provides a way to study directly the relationship between adhesive flow and the micro-mechanics of wood adhesive bonds. Specimens...
Resource Type:: Dataset
Date Created:

Post-fire tree establishment and early cohort development in conifer forests of the western Cascades of Oregon, USA

Creator:: Tepley, Alan J., Swanson, Frederick J., and Spies, Thomas A.
Abstract:: Early‐seral ecosystems make important contributions to regional biodiversity by supporting high abundance and diversity of many plant and animal species that are otherwise rare or absent from closed‐canopy forests. Therefore, the period of post‐fire tree establishment is a key stage in forest stand and ecosystem development that can be viewed...
Resource Type:: Article
Full Text:: Oregon, USA ALAN J. TEPLEY,1,3,� FREDERICK J. SWANSON,2 AND THOMAS A. SPIES2 1Departments of

Fire-mediated pathways of stand development in Douglas-fir/ western hemlock forests of the Pacific Northwest, USA

Creator:: Tepley, Alan J., Swanson, Frederick J., and Spies, Thomas A.
Abstract:: Forests dominated by Douglas-fir and western hemlock in the Pacific Northwest of the United States have strongly influenced concepts and policy concerning old-growth forest conservation. Despite the attention to their old-growth characteristics, a tendency remains to view their disturbance ecology in relatively simple terms, emphasizing infrequent, stand-replacing (SR) fire and...
Resource Type:: Article
Full Text:: / western hemlock forests of the Pacific Northwest, USA ALAN J. TEPLEY,1,3 FREDERICK J. SWANSON,2 AND

A Permutation Test for Correlated Errors in Adjacent Questionnaire Items

Creator:: Hildreth, Laura A., Genschel, Ulrike, Lorenz, Frederick, and Lesser, Virginia
Abstract:: Response patterns are of importance to survey researchers because of the insight they provide into the thought processes respondents use to answer survey questions. In this paper we propose the use of structural equation modeling to examine response patterns and develop a permutation test to quantify the likelihood of observing...
Resource Type:: Article
Full Text:: Technical Guide to ODOT Simulations in SAS 1 A

Expression of functional traits during seedling establishment in two populations of Pinus ponderosa from contrasting climates

Creator:: Kerr, Kelly L., Meinzer, Frederick C., McCulloh, Katherine A., Woodruff, David R., and Marias, Danielle E.
Abstract:: First-year tree seedlings represent a particularly vulnerable life stage and successful seedling establishment is crucial for forest regeneration. We investigated the extent to which Pinus ponderosa P. & C. Lawson populations from different climate zones exhibit differential expression of functional traits that may facilitate their establishment. Seeds from two populations...
Resource Type:: Article

ScholarsArchive@OSU

X-ray computed tomography of wood-adhesive bondlines: attenuation and phase-contrast effects

Potential for Using Essential Oils to Protect Viscoelastic Thermal Compression–Treated Hybrid Poplar

Influence of the thermo-hydro-mechanical treatments of wood on the performance against wood degrading fungi

Phenol formaldehyde adhesives formulated for advanced x-ray imaging in wood-composite bondlines

Microstructure of viscoelastic thermal compressed (VTC) wood using computed microtomography

Data from: Methodology for comparing wood adhesive bond load transfer using digital volume correlation

Post-fire tree establishment and early cohort development in conifer forests of the western Cascades of Oregon, USA

Fire-mediated pathways of stand development in Douglas-fir/ western hemlock forests of the Pacific Northwest, USA

A Permutation Test for Correlated Errors in Adjacent Questionnaire Items

Expression of functional traits during seedling establishment in two populations of Pinus ponderosa from contrasting climates

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