The effect of diameter variability and medullation of wool on Fibre Fineness Distribution Analyser (FFDA) measurements.

Authors

  • Nelson Manzoni de Oliveira
  • Dennis C. Teasdale
  • John P. Kennedy

DOI:

https://doi.org/10.1590/S1678-3921.pab1990.v25.13428

Keywords:

wool fibre diameter variability, calibration, coarse tops, medullation, assessment methods.

Abstract

The effect of medullation and variability of fibre diameter on FFDA measurements were investigated. For a FFDA fitted with the expanding (new) cell, medullated wools and more variable wools gave finer results than those obtained with the projection microscope. Equations correcting FFDA results for the degree of medullation are presented. It is suggested that calibration using a coarser top than those currently in use would improve measurements on coarse wools

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How to Cite

Oliveira, N. M. de, Teasdale, D. C., & Kennedy, J. P. (2014). The effect of diameter variability and medullation of wool on Fibre Fineness Distribution Analyser (FFDA) measurements. Pesquisa Agropecuaria Brasileira, 25(3), 435–443. https://doi.org/10.1590/S1678-3921.pab1990.v25.13428

Issue

v.25, n.3, mar. 1990

Section

ANIMAL SCIENCE