Characterization of extractives from biomasses of the alpine forests and their antioxidative efficacy

Piccand, Miguel; Bianchi, Sauro; Halaburt, Ellen Isabell; Mayer, Ingo (2019). Characterization of extractives from biomasses of the alpine forests and their antioxidative efficacy Industrial Crops and Products, 142, p. 111832. Elsevier 10.1016/j.indcrop.2019.111832

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Tree species typical of the alpine forests can be valued not only as sources of timber, but also as raw tissues for the recovering of extractives with significant antioxidant activity (AA). To improve knowledge about the ex- tractive content in these trees and to investigate whether there is a correlation between extract composition and AA, heartwoods, sapwoods, barks, knotwoods, twigs and needles of seven of the most common tree species from the alpine region were extracted with different solvents by Accelerated Solvent Extraction (ASE). The extracts were characterized by GC–MS for fatty and resin acids, TD-GC/MS for terpenes, HPLC-UV for phenolic mono- mers and condensed tannins (CT), and GC-FID for mono- and polysaccharides. The AA of the extracts were thereafter estimated using the DPPH assay. The exact composition of extractives derived was highly characteristic of each specific plant tissue, and some general trends were observed. The richest tissues in extractives (18.6–39.0% on dry tissue) were barks and needles. However, sapwoods showed a very low presence of extractives (5.2–7.5%). The main extractable compounds from bark were CT and polysaccharides, while phenolic monomers and monosaccharides re- presented the majority of needle extractives. Terpenes were mostly detected in twigs. The composition of ex- tractives for heartwoods and knotwoods were more scattered and closely associated to the tissues. A significant correlation between the extract composition and their AA was demonstrated by a multiple linear regression analysis (p-value<0.001). The most effective compounds contributing to the high AA of the extracts were CT. Plant tissue rich in condensed tannins like European oak heartwood, Scots pine bark and Norway spruce bark, should therefore be considered as the most suitable sources for natural antioxidants from the alpine region. However, the findings need to be validated with further antioxidant assays. 1.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology BFH Centres and strategic thematic fields > BFH Centre for Wood - Resource and Material
Name:	Piccand, Miguel; Bianchi, Sauro0000-0002-6979-3622; Halaburt, Ellen Isabell and Mayer, Ingo
Subjects:	Q Science > Q Science (General) Q Science > QD Chemistry Q Science > QK Botany S Agriculture > SD Forestry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology
ISSN:	09266690
Publisher:	Elsevier
Language:	English
Submitter:	Christelle Ganne-Chédeville
Date Deposited:	21 Nov 2019 08:48
Last Modified:	18 Dec 2020 13:29
Publisher DOI:	10.1016/j.indcrop.2019.111832
ARBOR DOI:	10.24451/arbor.9059
URI:	https://arbor.bfh.ch/id/eprint/9059