¹H Nuclear Magnetic Resonance of Lodgepole Pine Wood Chips Affected by the Mountain Pine Beetle

Tara M Todoruk; Ian D Hartley; Roshanak Teymoori; Jianzhen Liang; Hartwig Peemoeller

doi:10.3390/ma4010131

¹H Nuclear Magnetic Resonance of Lodgepole Pine Wood Chips Affected by the Mountain Pine Beetle

Materials (Basel). 2010 Dec 31;4(1):131-140. doi: 10.3390/ma4010131.

Authors

Tara M Todoruk¹, Ian D Hartley², Roshanak Teymoori³, Jianzhen Liang⁴, Hartwig Peemoeller⁵

Affiliations

¹ Physics Department, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia, Canada. todorukt@unbc.ca.
² Ecosystem Science and Management Program, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia, Canada. hartley@unbc.ca.
³ Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta, Canada. teymoori@ualberta.ca.
⁴ Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada.
⁵ Department of Physics and Astronomy, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada. peemoell@uwaterloo.ca.

Abstract

In this study, wood-water interactions of mountain pine beetle affected lodgepole pine were found to vary with time since death. Based on an analysis of magnetization components and spin-spin relaxation times from 1H NMR, it was determined that the mountain pine beetle attack does not affect the crystalline structure of the wood. Both the amorphous structure and the water components vary with time since death, which could be due to the fungi present after a mountain pine beetle attack, as well as the fact that wood from the grey-stage of attack cycles seasonally through adsorption and desorption in the stand.

Keywords: free induction decay (FID); lodgepole pine; moisture content; mountain pine beetle; nuclear magnetic resonance (NMR); spin-spin relaxation time.