Douglas-FIR Bark. III. Sterol and Wax Esters of The n-Hexane WAX

Authors

  • Murray L. Laver
  • Henry Hai-Loong Fang

Keywords:

Sterol esters, wax esters, sitosterol, campesterol, Douglas-fir bark, Pseudotsuga menzieii, n-hexane wax

Abstract

Sterol and wax esters were isolated as chemically intact compounds from the n-hexane-soluble fraction of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] bark in a continuing effort to elucidate the properties of this wax. The sterol esters were composed of sitosterol and campesterol esterified to any or all of the fatty acids, n-tridecanoic acid, n-hexadecanoic acid, n-heptadecanoic acid, cis-9-octadecenoic acid, n-nonadecanoic acid, n-eicosanoic acid, n-docosanoic acid, and n-tetracosanoic acid. The wax esters were composed of 1-docosanol and 1-tetracosanol, also esterified to the above-named acids. The fact that any or all of the fatty acids can be esterified to each of the sterols and alcohols, producing a great mixture of different sterol and wax esters, may partly account for the softness and low melting point of Douglas-fir n-hexane wax.

References

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Published

2007-06-28

Issue

Number 4 / October 1986

Section

Research Contributions

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