%0 Journal Article
%T Structural Elucidation of Condensed Tannin from  <i>Picea mariana</i> Bark
%A Papa Niokhor Diouf
%A Carmen Mihaela Tibirna
%A Martha-Estrella Garc¨ªa-P¨¦rez
%A Mariana Royer
%A Pascal Dub¨¦
%A Tatjana Stevanovic
%J Journal of Biomaterials and Nanobiotechnology
%P 1-8
%@ 2158-7043
%D 2013
%I Scientific Research Publishing
%R 10.4236/jbnb.2013.43A001
%X <p>
	<span style=\"font-family:Verdana;\">The aim of this work was to determine
the structural characteristics of the condensed tannins isolated from the
aqueous extract of black spruce (</span><i><span style=\"font-family:Verdana;\">Picea
mariana</span></i><span style=\"font-family:Verdana;\"> Mill) bark. This is the first report on the structural
characterization of condensed tannins from black spruce bark. The condensed
tannins from the hot water extract prepared from </span><i><span style=\"font-family:Verdana;\">Picea mariana</span></i><span style=\"font-family:Verdana;\"> bark were isolated by column chromatography on
Sephadex LH-20 media. In this study, UV-visible and </span><sup><span style=\"font-family:Verdana;\">13</span></sup><span style=\"font-family:Verdana;\">C-NMR spectroscopic techniques, along with pyrolysis-gas
chromatography/mass spectrometry (Py-GC/MS) and liquid chromatogramphy analyses were applied to determine the
structural characteristics of black spruce bark tannins. We have confirmed for
the first time the presence of methoxylated B-rings in the flavanol units of
condensed tannins from black spruce bark, which could be regarded as further
contribution to the chemotaxonomy of the genus </span><i><span style=\"font-family:Verdana;\">Picea</span></i><span style=\"font-family:Verdana;\">. The methoxylation of Norway spruce bark condensed tannins have been demonstrated previously.</span> 
</p>
%K &lt
%K i&gt
%K Picea mariana&lt
%K /i&gt
%K Bark
%K Condensed Tannins
%K Proanthocyanidins
%K Polyphenols
%K Structural Characterization
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=33623