Microscopically Visible Internal Surface Area of Earlywood and Latewood of Loblolly Pine

Authors

  • Joe Yao
  • Teddy Ching Ma

Keywords:

Pinus taeda, earlywood, latewood, internal surface area, lumen surface areas, specific gravity

Abstract

Microscopically visible internal surface (MVIS) areas of earlywood and latewood of loblolly pine were estimated. Steps of calculation for MVIS area described. For the study tree, there was no difference in MVIS area between earlywood and latewood for the same volume in spite of difference in specific gravity. However, on a unit-weight basis, MVIS area decreased with increasing specific gravity.

References

Koch, P. 1972. Utilization of the southern pines. Vol. I. The raw material. Agric. Handb. 420. USDA For. Serv. Pp. 83-186.nKollmann, F. F. P., and W. A. Cöté. 1968. Principles of wood science and technology, I. Solid wood, Springer-Verlag, New York, Pp. 10-12.nPanshin, A. J., and C. DeZeeuw. 1971. Textbook of wood technology, Vol. I. 3rd ed. McGraw-Hill, New York. Pp. 110-249.nStam, A. J. 1946. Passage of liquids, vapors, and dissolved materials through softwoods. USDA Agric. Tech. Bull. No. 929.nStam, A. J. 1964. Wood and cellulose science. Ronald Press, New York. Pp. 186-201.nYao, J. 1968. Modified mercury immersion method in determinig specific gravity of small, irregular wood specimens, For Prod. J. 18(2):56-59.nYao, J. 1970. Influence of growth rate on specific gravity and other selected properties of loblolly pine. Wood Sci. Technol, 4:163-175.nYao, J. 1974. The relationship between fiber saturation point and sampling position in loblolly pine. J. For. (Rep. of China). 3:7-14.n

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Published

2007-06-28

Issue

Number 2 / Summer 1978

Section

Research Contributions

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