There is no doubt that adhesive penetration plays an important role in wood bondline joint performance and durability; yet, to date there is no direct experimental evidence linking penetration depth with bond performance. This is, in part, because adhesive penetration is commonly assessed with various 2D microscopy techniques that are...
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Jesse Loren Paris for the degree of Doctor of Philosophy in Wood Science and Materials
Science
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...
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...
Published May 1954. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The subject of Traditional Ecological Knowledge (TEK) is currently attracting interest from many quarters,
including biologists and philosophers as well as the more traditional mix of anthropologists and other social scientists. Given
rapid contemporary rates of change, as well as the novel species and environments being created by six billion...
We report on geochemical data from anoxic sequences of the Nicobar Fan, recovered during International Ocean Discovery Program (IODP) expedition 362 to the Sumatra subduction zone. Analyses include strontium and carbon isotope composition of pore fluids, elemental and isotopic composition of carbonate concretions, and whole sediment analyses.
Complex symbioses between animal or plant hosts and their associated microbiotas can involve thousands of species and millions of genes. Because of the number of interacting partners, it is often impractical to study all organisms or genes in these host-microbe symbioses individually. Yet new phylogenetic predictive methods can use the...
Vibrio cholerae is a gram-negative gammaproteobacteria, well
known for causing the watery-diarrheal disease Cholera. V. cholerae is
endemic to the marine and freshwater ecosystems of India and
surrounding aquatic environments within that region. Primary
reservoirs include brackish water and estuaries. The primary symptom
is rapid dehydration due to watery diarrhea....
