Relation of Comparative Diffusion Rates of Oak Ray and Surrounding Tissue to Check Formation

Authors

  • W. T. Simpson

Keywords:

<i>Qucrcus alba</i>, <i>Q. rubra</i>, <i>Q. falcata</i> var. <i>pagodalfolia</i>, desorption, seasoning, check formation

Abstract

The rate of radial moisture diffusion in desorption was determined for both the ray-tissue and the surrounding tissue of white oak, northern red oak, and cherrybark oak. In all these species, radial moisture diffusion was found faster in ray tissue than it was in the surrounding tissue. The relationship of this phenomenon to surface checking during drying is discussed.

References

Clarke, S. H. 1930. The differential shrinkage of wood. Forestry 4(2):93-104.nCrank, J. 1956. The mathematics of diffusion. Clarendon Press, Oxford, England.nGaby, L. I. 1963. Surface checking of white oak as related to mechanical processing. For. Prod. J. 13(12):529-532.nMorschauser, C. R. 1954. The effect of rays on the differential shrinkage of red oak. J. For. Prod. Res. Soc. 4(5):280-282.nPanshin, A. J., and C. deZeeuw. 1970. Textbook of wood technology, 3d ed., McGraw-Hill Book Co., New York.nScarborough, J. B. 1962. Numerical mathematical analysis. Johns Hopkins Press, Baltimore.nSchniewind, A. P. 1959. Transverse anistropy of wood: A function of gross anatomic structure. For. Prod. J. 9(10):350-359.nSchniewind, A. P. 1960. On the nature of drying stresses in wood. Holzforschung 14(6):161-168.nSchniewind, A. P. 1963. Mechanism of check formation. For. Prod. J. 13(11):475-480.nSchniewind, A. P. 1966. Irregularities of finished surfaces caused by unequal ray shrinkage. For. Prod. J. 16(8):66-67.nSchniewind, A. P., and P. C. Kersavage. 1961. A quantitative evaluation of second order drying stresses. For. Prod. J. 11(11):523-530.nSteel, R. G. D., and J. H. Torrie. 1960. Principles and procedures of statistics. McGraw-Hill Book Co., New York.n

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Published

2007-06-05

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Section

Research Contributions