Effects of industry-inspired storage conditions on the contents of hydrophilic extractives and polyphenols in Silver fir (Abies alba Mill.) bark

Hrovatič, Peter (avtor), Levanič, Tom (avtor), Oven, Primož (avtor), Poljanšek, Ida (avtor), Vek, Viljem (avtor)

Silver fir bark (Abies alba Mill.) is an underutilized renewable resource containing valuable extractives and polyphenols of industrial importance. This study compared the influence of two storage methods on the extraction of total hydrophilic extractives content (TEC) and total polyphenols content (TPC) from silver fir bark samples. Bark samples were collected from two storage types: bark left on stem sections and stored under cover (B-D), and mechanically removed industrial bark stored outdoors (B-IS), over a 12-month period with monthly sampling and extraction, followed by measurements of TEC and TPC using gravimetric and spectrophotometric methods. B-D samples showed no statistically significant decrease in TEC or TPC during one year of storage, while B-IS samples exhibited substantial losses, with TEC decreasing by more than half (50.82%) and TPC by 65.68%, most rapidly within the first 3 months when precipitation-driven leaching and degradation processes were obviously most pronounced. These results demonstrate that bark removed before storage is much more susceptible to degradation and leaching of the hydrophilic extractives than bark retained on logs, confirming that mechanical disintegration and exposure to weathering accelerate the loss of valuable extractives and polyphenols. A strong TEC–TPC correlation (r = 0.67–0.81, p < 0.0001) provides a practical methodological approach for rapid biomass quality screening. Overall, the findings offer quantitative guidance for optimizing debarking timing and storage practices to preserve extractive yield and enhance the efficiency of bark-based biorefinery processes.

• Jezik: Angleški jezik
• Ključne besede: silver fir bark, Abies alba Mill., extractives, polyphenols, biomass storage, chemical analysis, circular bioeconomy, bioactive compounds, forest-based by-products
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: BF - Biotehniška fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2026
• Št. strani: 18 str.
• Številčenje: Vol. 17, issue 2, [article no.] 280
• PID: 20.500.12556/RUL-180290
• UDK: 630*8
• ISSN pri članku: 1999-4907
• DOI: 10.3390/f17020280
• COBISS.SI-ID: 270550787
• Datum objave v RUL: 05.03.2026

Gradivo je del revije

• Naslov: Forests
• Skrajšan naslov: Forests
• Založnik: MDPI
• ISSN: 1999-4907
• COBISS.SI-ID: 3872166

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: skorja bele jelke, ekstraktivi, polifenoli, skladiščenje biomase, krožno gospodarstvo, bioaktivne spojine