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Analysis of extractives from Pinus halepensis and Eucalyptus camaldulensis as predominant trees in Algeria

  • Nacera Benouadah EMAIL logo , Andrey Pranovich , Djamel Aliouche , Jarl Hemming , Annika Smeds and Stefan Willför
Published/Copyright: September 15, 2017

Abstract

The lipophilic and hydrophilic extractives in the sapwood (sW) and heartwood (hW) of stems from Pinus halepensis Mill and Eucalyptus camaldulensis Dehnh trees grown in the north of Algeria were analyzed. The extraction of dried samples was carried out in an accelerated solvent extractor (ASE). The lipophilic substances were first extracted with n-hexane and then the hydrophilic ones with acetone/water. The extractives were analyzed by gas chromatography-flame ionization detection (GC-FID), GC-mass spectroscopy (MS) and high-performance size-exclusion chromatography (HPSEC). The largest amount of lipophilic extractives (≈13.4 mg g−1) was observed in the hW of P. halepensis, while the hW of E. camaldulensis contained the largest amount of hydrophilic extractives (≈116.3 mg g−1). Lipophilic extractives are mainly composed of oleoresins (resin acids, terpenes), fats (fatty acids, glycerides, steryl esters, sterols) and waxes (fatty alcohols). Hydrophilic extractives are composed of polyphenols (stilbenes, flavanols), sugars (monosaccharides) and sugar alcohols (cyclic polyols). The main identified lipophilic extractives are resin acids in pine and glycerides in eucalypt. The main identified hydrophilic extractives are cyclic polyols in pine and flavanols and monosaccharides in eucalypt. The total content of extractives is higher in hW than in sW.

Acknowledgments

This work was part of the research activities of the Johan Gadolin Process Chemistry Centre at Åbo Akademi University in Finland. We thank The Algerian Ministry of Higher Education and Scientific Research for funding support within “Le Projet National Exceptionnel (P.N.E)”. Mohamed Benamane from the Directorate of Forestry of the Wilaya of Boumerdès and Mohamed Ziyou from the Algiers Post Office are acknowledged for their logistic support.

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Received: 2017-6-9
Accepted: 2017-8-22
Published Online: 2017-9-15
Published in Print: 2018-1-26

©2017 Walter de Gruyter GmbH, Berlin/Boston

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