The Use of PIT Apertures as Windows To Measure Microfibril Angle in Chemical Pulp Fibers

Authors

  • L. A. Donaldson

Keywords:

Chemical pulp fibers, pit apertures, polarized light microscopy

Abstract

A technique for measuring microfibril angle in chemical pulp fibers using polarized light is described. Pit apertures are used as windows so that measurements can be made on single cell walls behind the pit in the absence of pit membranes. Typical data are presented using two neutral sulphite anthraquinone pulps as examples. Problems in data analysis are discussed with respect to sample size and heterogeneity of the pulp. The technique can be used on unrefined softwood chemical pulp fibers.

References

Bailey, I. W., and M. R. Vestal. 1937. The orientation of cellulose in the secondary wall of tracheary cells. J. Arnold Arboretum 18(3):185-195.nBoyd, J. D. 1977. Interpretation of X-ray diffractograms of wood for assessments of microfibril angles in fibre cell wall. Wood Sci. Technol. 11:93-114.nBurke, P. V., B. L. Bullen, and K. L. Poff. 1988. Frequency distribution histograms for the rapid analysis of data. Plant Physiol. 87:797-798.nCave, I. D. 1966. Theory of X-ray measurement of microfibril angle in wood. For. Prod. J. 16(10):37-42.nCockrell, R. A. 1974. A comparison of latewood pits, fibril orientation and shrinkage of normal and compression wood of giant sequoia. Wood Sci. Technol. 6:58.nEl-Hosseiny, F., and D. H. Page. 1973. The measurement of fibril angle of wood fibers using polarised light. Wood and Fiber 5(3):208-214.nLeney, L. 1981. A technique for measuring fibril angle using polarized light. Wood and Fiber 13(1):13-16.nManwiller, F. G. 1966. Sénarmont compensation for determining fibril angles of cell wall layers. For. Prod. J. 16(10):26-30.nPage, D. H. 1969. A method for determining fibrillar angle in wood tracheids. J. Roy. Microsc. Soc. 90(2):137-143.nPage, D. H., and F. El-Hosseiny. 1974. The birefringence of wood pulp fibres and the thickness of the St and S3 layers. Wood and Fiber 6(3):186-192.nPreston, R. D. 1934. Organisation of the cell wall of the conifer tracheid. Royal Society, Philosophical Trans. B 224:131-173.nSenft, J. F., and B. A. Bendtsen. 1985. Measuring microfibrillar angles using light microscopy. Wood Fiber Sci. 17(4):564-567.nSteel, R. G. D., and J. H. Torrie. 1981. Principles and procedures of statistics 2nd ed. McGraw Hill Inc., Auckland.n

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Published

2007-06-28

Issue

Number 2 / April 1991

Section

Research Contributions

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