Thermal stability of Abies alba wood according to its radial position and forest management

Hamada, Joël; Pétrissans, Anelie; Ruelle, Julien; Mothe, Frédéric; Colin, Francis; Pétrissans, Mathieu; Gérardin, Philippe

doi:10.1007/s00107-018-1353-5

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…In addition to the aforementioned longitudinal variation of water/ethanol soluble extractives in silver r bark, radial variability in the content of total extractives was also observed. According to the results presented, Soxhlet extraction of sapwood and heartwood with a toluene/ethanol mixture yielded an average of 1.4% and 2.3% soluble extractives, respectively(Hamada et al 2018). According toWillför et al (…”

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confidence: 95%

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Effect of Accelerated Extraction and Sonication on the Antioxidant Capacity of Wood and Bark Extracts of Wet-hearted Silver Fir (Abies Alba Mill.)

Vek,

Hofmann,

Rajczi

et al. 2024

Preprint

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The aim of this study was to compare the antioxidant capacity of hydrophilic extracts of different tissues of wet-hearted silver fir (Abies alba Mill.) logs. Wet heart is a wood defect of silver fir and lowers the value of wood. The exploitation of extractives could increase utilization and financial returns. The bark, sapwood, heartwood and knotwood were investigated by using two green extraction methods: ultrasound assisted extraction (US) and accelerated solvent extraction (ASE), with aqueous ethanol as solvent. Total extractive content (TEC), total polyphenol content (TPC) and antioxidant capacities (FRAP, DPPH, ABTS) from the extracts were determined and compared. The highest contents of total hydrophilic extractives were measured in knotwood (23.07%, ASE) and bark (10.31%, ASE), and the lowest values were determined for sapwood (2.00%, ASE) and heartwood (3.56%, ASE). The ASE method resulted in significantly higher TPC (0.65-10.58 %) than the US (0.46-9.19 %) method. Nevertheless, the simplicity of instrumentation and costs can make US also a potential candidate for future extraction and utilization. The highest antioxidant capacities were measured in knotwood (FRAP: 159.75 mg AAE/g, ABTS: 316.15 mg TE/g, DPPH: 189.23 mg TE/g) and bark (FRAP: 159.75 mg AAE/g, ABTS: 126.81 mg TE/g, DPPH: 74.52 mg TE/ g) extracts, prepared with ASE, which complements well the existing literature data on silver fir extractives. The knotwood and bark of wet-hearted silver fir is an abundant source of antioxidant polyphenols, whereas sapwood and heartwood are poor in these extractives, making them unlikely candidates for future extractions of natural antioxidants.

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“…). In terms of the solvents used for extraction, silver r extractives have been obtained with water or various less and more polar organic solvents, e.g., hexane, toluene, aqueous acetone and aqueous ethanol (Hamada et al 2018;Kebbi-Benkeder et al 2015;Tavčar Benković et al 2014;Willför et al 2004).…”

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confidence: 99%

Effect of Accelerated Extraction and Sonication on the Antioxidant Capacity of Wood and Bark Extracts of Wet-hearted Silver Fir (Abies Alba Mill.)

Vek,

Hofmann,

Rajczi

et al. 2024

Preprint

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“…However, information on the content variability of extractives in stemwood and KW in a radial direction, as well as in BW, still remains unclear. For silver fir (A. alba), Hamada et al [13] found the largest amounts of toluene/ethanol soluble extractives in juvenile and inner HE, with lower amounts measured for outer HW and SW samples. It is evident that the existing information on the variability of hydrophilic/phenolic extractives in the radial direction for stemwood and KW of silver fir is not clearly presented.…”

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confidence: 99%

Wood Extractives of Silver Fir and Their Antioxidant and Antifungal Properties

et al. 2021

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The chemical composition of extractives in the sapwood (SW), heartwood (HW), knotwood (KW), and branchwood (BW of silver fir (Abies alba Mill.) was analyzed, and their antifungal and antioxidant properties were studied. In addition, the variability of extractives content in a centripetal direction, i.e., from the periphery of the stem towards the pith, was investigated. The extracts were analyzed chemically with gravimetry, spectrophotometry, and chromatography. The antifungal and antioxidative properties of the extracts were evaluated by the agar well diffusion method and the diphenyl picrylhydrazyl radical scavenging method. Average amounts of hydrophilic extractives were higher in KW (up to 210.4 mg/g) and BW (148.6 mg/g) than in HW (34.1 mg/g) and SW (14.8 mg/g). Extractives identified included lignans (isolariciresinol, lariciresinol, secoisolariciresinol, pinoresinol, matairesinol) phenolic acids (homovanillic acid, coumaric acid, ferulic acid), and flavonoids epicatechin, taxifolin, quercetin). Secoisolariciresinol was confirmed to be the predominant compound in the KW (29.8 mg/g) and BW (37.6 mg/g) extracts. The largest amount of phenolic compounds was extracted from parts of knots (281.7 mg/g) embedded in the sapwood and from parts of branches (258.9 mg/g) adjacent to the stem. HW contained more lignans in its older sections. Hydrophilic extracts from knots and branches inhibited the growth of wood-decaying fungi and molds. KW and BW extracts were better free radical scavengers than HW extracts. The results of the biological activity tests suggest that the protective function of phenolic extracts in silver fir wood can also be explained by their antioxidative properties. The results of this study describe BW as a potential source of phenolic extractives in silver fir.

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Effect of accelerated extraction and sonication on the antioxidant capacity of wood and bark extracts of wet-hearted silver fir (Abies alba Mill.)

Vek,

Hofmann,

Rajczi

et al. 2024

Eur. J. Wood Prod.

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The aim of this study was to compare the antioxidant capacity of hydrophilic extracts of different tissues of wet-hearted silver fir (Abies alba Mill.) logs. Wet heart is a wood defect of silver fir and lowers the value of wood. The exploitation of extractives could increase utilization and financial returns. The bark, sapwood, heartwood and knotwood were investigated by using two green extraction methods: ultrasound assisted extraction (US) and accelerated solvent extraction (ASE), with aqueous ethanol as solvent. Total extractive content (TEC), total polyphenol content (TPC) and antioxidant capacities (FRAP, DPPH, ABTS) from the extracts were determined and compared. The highest contents of total hydrophilic extractives were measured in knotwood (23.07%, ASE) and bark (10.31%, ASE), and the lowest values were determined for sapwood (2.00%, ASE) and heartwood (3.56%, ASE). The ASE method resulted in significantly higher TPC (0.65–10.58%) than the US (0.46–9.19%) method. Nevertheless, the simplicity of instrumentation and costs can make US also a potential candidate for future extraction and utilization. The highest antioxidant capacities were measured in knotwood (FRAP: 159.75 mg AAE/g, ABTS: 316.15 mg TE/g, DPPH: 189.23 mg TE/g) and bark (FRAP: 159.75 mg AAE/g, ABTS: 126.81 mg TE/g, DPPH: 74.52 mg TE/ g) extracts, prepared with ASE, which complements well the existing literature data on silver fir extractives. The knotwood and bark of wet-hearted silver fir is an abundant source of antioxidant polyphenols, whereas sapwood and heartwood are poor in these extractives and potentially unsuitable for the valorization by the extraction of natural antioxidants.

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Thermal stability of Abies alba wood according to its radial position and forest management

Cited by 6 publications

References 34 publications

Effect of Accelerated Extraction and Sonication on the Antioxidant Capacity of Wood and Bark Extracts of Wet-hearted Silver Fir (Abies Alba Mill.)

Effect of Accelerated Extraction and Sonication on the Antioxidant Capacity of Wood and Bark Extracts of Wet-hearted Silver Fir (Abies Alba Mill.)

Wood Extractives of Silver Fir and Their Antioxidant and Antifungal Properties

Effect of accelerated extraction and sonication on the antioxidant capacity of wood and bark extracts of wet-hearted silver fir (Abies alba Mill.)

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