Skip to Main Content
Loblolly pine bark flavanoidsAuthor(s): J.J. Karchesy; R.W. Hemingway
Source: Journal of Agricultural and Food Chemistry 28:222-228
Publication Series: Miscellaneous Publication
PDF: View PDF (1.7 MB)
DescriptionThe inner bark of Pinus taeda L. contains (+)-catechin, the procyanidin 8.1 (a C-4 to C-8 linked (-)-epicatechin to (+)-catechin dimer), and three polymeric procyanidins that have distinctly different solubility and chromatographic properties. An ethyl acetate soluble polymer (0.20% of bark, Mn = 1200) was purified by chromatography on LH-20 Sephadex. A water-soluble tannin (6.3% of bark, Mn = 2100) and an acetone/water-soluble tannin (3.7% of bark, Mn = 2900) were purified by chromatography on cellulose columns. Despite differences in their physical properties, thiolysis with benzenethiol and 18C-NMR spectra indicated that the three polymeric procyanidins were composed of C-4 to C-8 (or C-6) linked (-)-epicatechin upper units (chain extenders) and that the lower unit (chain initiator) was (+)-catechin.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationKarchesy, J.J.; Hemingway, R.W. 1980. Loblolly pine bark flavanoids. Journal of Agricultural and Food Chemistry 28:222-228
- The phenolic extractives in southern red oak (Quercus falcata Michx. var. falcata)
- Condensed tannins: (4β→8;2β→O→7)-linked procyanidins in Arachis hypogea L.
- Recent Advances in the Chemistry of Condensed Tannins
XML: View XML