How Do You Rate This Publication?       

Title:	Fatty and Waxy Components of Southern Pine Bark-Amounts Present As Free Extractives
Author(s):	Howard, Elaine T.
Date:	1975
Source:	Res. Note SO-204. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 4 p.
Station ID:	RN-SO-204
Description:	Whole bark from six mature trees of each of the four major southern pines was extracted with petroleum ether and with toluene. Trees were 20 to 58 years old and 8.0 to 11.8 inches in d.b.h. Percentages of petroleum ether-solubles were: slash pine, 1.94; loblolly, 2.29; longleaf, 2.64; and shortleaf 3.05. Percentages obtained by toluene extraction were: loblolly, 3.04; slash, 3.18; longleaf, 3.38; shortleaf, 3.77. Extractives were light to medium yellow, resinous in odor, and slightly tacky. Several procedures for removing these components from aqueous and ethanolic alkali extracts were tried, including organic solvent extraction of basic and acidified extracts, and acidification and filtration followed by solvent extraction. None of the methods increased the yield of lipids, and products were generally softer and stickier than those obtained by direct extraction.
	View and Print this Publication (72 KB)
Pristine Version:	An uncaptured or "pristine" version of this publication is available. It has not been subjected to OCR (Optical Character Recognition) and therefore does not have any errors in the text. However it is a larger file size and some people may experience long download times. The "pristine" version of this publication is available here: View and Print the PRISTINE copy of this Publication (456 KB)
Publication Notes:	We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information. This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain. Our on-line publications are scanned and captured using Adobe Acrobat. During the capture process some typographical errors may occur. Please contact the SRS Webmaster, srswebmaster@fs.fed.us if you notice any errors which make this publication unuseable. You may send email to pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)
	Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility