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Wood extractives of Silver fir and their antioxidant and antifungal properties
ID
Vek, Viljem
(
Avtor
),
ID
Keržič, Eli
(
Avtor
),
ID
Poljanšek, Ida
(
Avtor
),
ID
Eklund, Patrik
(
Avtor
),
ID
Humar, Miha
(
Avtor
),
ID
Oven, Primož
(
Avtor
)
PDF - Predstavitvena datoteka,
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MD5: 9FA8BC5DA7DB48DB29437E257FE7CE48
URL - Izvorni URL, za dostop obiščite
https://www.mdpi.com/1420-3049/26/21/6412
Opis: Odprti dostop
Galerija slik
Izvleček
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.
Jezik:
Angleški jezik
Ključne besede:
Abies alba
,
knotwood
,
chromatography
,
lignans
,
antioxidant properties
,
antifungal properties
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
BF - Biotehniška fakulteta
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2021
Št. strani:
Str. 1-15
Številčenje:
Vol. 26, no. 21
PID:
20.500.12556/RUL-133090
UDK:
630*8
ISSN pri članku:
1420-3049
COBISS.SI-ID:
83366403
Datum objave v RUL:
11.11.2021
Število ogledov:
812
Število prenosov:
167
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Molecules
Skrajšan naslov:
Molecules
Založnik:
MDPI
ISSN:
1420-3049
COBISS.SI-ID:
18462981
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.
Začetek licenciranja:
23.10.2021
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
jelka
,
grče
,
kromatografija
,
lignani
,
antioksidativne lastnosti
,
antimikrobne lastnosti
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
L4-2623
Naslov:
Pridobivanje ekstraktov grč in skorje z visoko vsebnostjo polifenolov iz manj izkoriščene biomase bele jelke
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
J2-1723
Naslov:
Katalitska pretvorba lignina v bio-osnovane polimerne gradnike z uporabo CO2 (CaLiBration)
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
V4-2017
Naslov:
Izboljšanje konkurenčnosti slovenske gozdno-lesne verige v kontekstu podnebnih sprememb in prehoda v nizko-ogljično družbo
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P4-0015
Naslov:
Les in lignocelulozni kompoziti
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