The Determination of the Cell Size in Wood by Nuclear Magnetic Resonance Diffusion Techniques

Authors

  • Wei Wycoff
  • Stephen Pickup
  • Bruce Cutter
  • William Miller
  • Tuck C. Wong

Keywords:

NMR, cell size, diffusion, wood

Abstract

Two nuclear magnetic resonance (NMR) pulsed field gradient diffusion approaches have been applied to the measurement of the magnitude and the distribution of the tangential dimension of cells in a number of wood samples. The results thus obtained were compared with the results from microscopy. The results from these two approaches agree with each other and they also give excellent agreement with the microscopy results. The results of this work demonstrate that NMR diffusion is an accurate and convenient method for the measurement of cell sizes in wood and in similar porous systems.

References

Callaghan, P. T. 1984. Pulsed field gradient nuclear magnetic resonance as a probe of liquid state molecular organisation. Aust. J. Phys. 37:359-387.nCallaghan, P. T. 1995. Pulsed-gradicnt spin-echo NMR of planar, cylindrical and spherical pores under conditions of wall relaxation. J. Magn. Reson. A 113:53-59.nGeen, H., S. Wimperis, and R. Freeman. 1989. Bandselective pulses without phase distortion. A simulated annealing approach. J. Magn. Reson. 85:620-627.nKirpatrick, S., C. D. Gelatt, and M. P. Vecchi. 1983. Optimization by simulated annealing. Science 220:671-680.nLauffer, D. E. 1974. NMR study of restricted self-diffusion in cylindrical tubes. Phys. Rev. A. 9:2792-2798.nMcCall, D. W., D. C. Douglass, and E. W. Anderson. 1963. Self-diffusion studies by means of nuclear magnetic resonance spin-echo techniques. Ber. Bunsenges. Phys. Chem. 67:336-340.nMills, R. 1973. Self-diffusion in normal and heavy water in the range 1-45°. J. Phys. Chem. 77:685-688.nPanshin, A., and C. De Zeeuw. 1980. Textbook of wood technology, vol. I. 4th ed. McGraw-Hill, New York, NY. 722 pp.nPress, W. H., and S. A. Teukolsky. 1991. Simulated annealing optimization over continuous spaces. Computers in Physics Jul/Aug:426-429.nPress, W. H., and S. A. Teukolsky, W. T. Vetterling, and B. P. Flannery. 1992. Numerical recipes in C: The art of scientific computing. Cambridge University Press, New York, NY. 994 pp.nRutenbar, R. A. 1989. Simulated annealing algorithms: An overview. IEEE Circuits and Devices Jan: 19-26.nSharp, A. R., M. T. Riggin, and R. Kaiser. 1978. Determination of moisture content of wood by pulsed nuclear magnetic resonance. Wood Fiber. 10:74-81.nSimpson, J. H., and H. Y. Carr. 1958. Diffusion and nuclear spin relaxation in water. Phys. Rev. 111:1201-1202.nStejskal, E. O., and J. E. Tanner. 1965. Spin diffusion measurements: spin echoes in the presence of a timedependent field gradient. J. Chem. Phys. 42:288-292.nStilbs, P. 1987. Fourier transform pulsed field gradient spin-echo studies of molecular diffusion. Progr. NMR Spectrose. 19:1-45.nTanner, J. E. 1970. Use of the stimulated echo in NMR diffusion studies. J. Chem. Phys. 52:2523-2526.nTanner, J. E., and E. O. Stejskal. 1968. Restricted self-diffusion of protons in colloidal systems by the pulsed-gradient spin-echo method. J. Chem. Phys. 49:1768-1777.n

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Published

2007-06-19

Issue

Number 1 / January 2000

Section

Research Contributions

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