Rakić, S.

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Influence of thermal treatment on polyphenolic compounds and antioxidant properties of Quercus robur kernels

Rakić, S.; Petrović, Silvana; Kukić, Jelena; Jadranin, Milka; Tešević, Vele

(Savez farmaceutskih udruženja Srbije, Beograd, 2006) 

TY  - CONF
AU  - Rakić, S.
AU  - Petrović, Silvana
AU  - Kukić, Jelena
AU  - Jadranin, Milka
AU  - Tešević, Vele
PY  - 2006
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/789
AB  - Polyphenolic compounds and antioxidant properties of dried MeOH extracts of
native (QN) and thermally treated (QT) kernels of English Oak, Quercus robur were
investigated. The content of total and simple polyphenols and tannins was determined
spectrophotometrically using FC-reagentr, while gallic acid content was estimatecl usipg
HPLC2. After thermal treatment tannin content was decreased (from 20,4 to 19,70 ),
with significant increase of simple polyphenols and gallic acid content (from 1,9 to
4,004, and from 0,5 to 5,lYo, respectively).
Antioxidant activity was estimated using FRAP test (total antioxidant activity,
TAA), scavenging of DPPH radical and TBA test (inhibition of lipid peroxidation, LP
in liposomes)r.
Sample-s QN and QT showed substantial antioxidant activify. TAA was 2.44 and.
3.76 pmol F.'*/mg, respectively. Comparing to quercetin and L-ascorbic acid these
values were ca 2-3 times lower. Both samples concentration-dependently scavenged
stable DPPH radical (IC5s:8.04 and 5.77 pglml), and inhibited LP (IC50:32.13 and
I 6.39 1tg/m| respectively).
Higher antioxidant activity of extract of thermally treated kernels (QT) could be
explained as a consequence of thermal degradation of hydrolysable tannins and,
therefore, increased gallic acid content.
AB  - Ispitivani su polifenolni sastojci i antioksidantna svojstva suvih MeOI.l
ekstrakata nativnog (QN) i termidki tretiranog (QT) semena luZnjaka, euercus robur.
SadrZaj ukupnih i netaninskih polifenola i tanina odredivan je spektiofotometrijski,
kori5cenjem Folin-Ciocalteu reagensa', a sadraaj galne kiseline tecnonr
hromatografijom (HPLC)2. Konstatovano je da nakon termicktg tretmana sadrZaj tanina
opada (sa 20,4 na 19,7o ), a znalajno raste kolidina netaninskih polifenola 1sa f ,9 na
4,0oA) i galne kiseline (sa 0,5 na 5 ,loh).
Za procenu antioksidante aktivnosti odredivani su: ukupna antioksidanta
aktivnost, UAA (FRAP test), sposobnost neutralizacije DPPH radikala i inhibitorni
efekat na lipidnu peroksidaciju (LP) u lipozomima (TBA tesr).r
Uzorci QN i QT ispoljili su znadajnu antioksidantnu aktivnost, i to UAA je
iznosila 2,44 i 3,76 pmol F.'*/rg, respektivno. Dobijene vrednosti aktivnosti su oko 2-
3 puta niZe u poredenju sa kvercetinom i vitaminom C. lJzorci eN i eT su
koncentraciono zavisno neutralisali DPPH radikal (IC5s:8,04 i 5,77 pglml) i inhibirali
LP (ICs0:32,13 i I 6,39 ltglml, respektivno).
Veia antioksidantna aktivnost ekstrakta termidki tretiranog semena (eT), moLe
se objasniti veiim sadrZajem galne kiseline, koja se oslobada razgradnjom
hidrolizujucih tanina tokom termidke obrade.
PB  - Savez farmaceutskih udruženja Srbije, Beograd
C3  - Arhiv za farmaciju
T1  - Influence of thermal treatment on polyphenolic compounds and antioxidant properties of Quercus robur kernels
T1  - Uticaj termičkog tretmana na polifenolne sastojke i antioksidantna svojstva semena lužnjaka, Quercus robur
VL  - 56
IS  - 5
SP  - 932
EP  - 933
UR  - https://hdl.handle.net/21.15107/rcub_farfar_789
ER  - 
@conference{
author = "Rakić, S. and Petrović, Silvana and Kukić, Jelena and Jadranin, Milka and Tešević, Vele",
year = "2006",
abstract = "Polyphenolic compounds and antioxidant properties of dried MeOH extracts of
native (QN) and thermally treated (QT) kernels of English Oak, Quercus robur were
investigated. The content of total and simple polyphenols and tannins was determined
spectrophotometrically using FC-reagentr, while gallic acid content was estimatecl usipg
HPLC2. After thermal treatment tannin content was decreased (from 20,4 to 19,70 ),
with significant increase of simple polyphenols and gallic acid content (from 1,9 to
4,004, and from 0,5 to 5,lYo, respectively).
Antioxidant activity was estimated using FRAP test (total antioxidant activity,
TAA), scavenging of DPPH radical and TBA test (inhibition of lipid peroxidation, LP
in liposomes)r.
Sample-s QN and QT showed substantial antioxidant activify. TAA was 2.44 and.
3.76 pmol F.'*/mg, respectively. Comparing to quercetin and L-ascorbic acid these
values were ca 2-3 times lower. Both samples concentration-dependently scavenged
stable DPPH radical (IC5s:8.04 and 5.77 pglml), and inhibited LP (IC50:32.13 and
I 6.39 1tg/m| respectively).
Higher antioxidant activity of extract of thermally treated kernels (QT) could be
explained as a consequence of thermal degradation of hydrolysable tannins and,
therefore, increased gallic acid content., Ispitivani su polifenolni sastojci i antioksidantna svojstva suvih MeOI.l
ekstrakata nativnog (QN) i termidki tretiranog (QT) semena luZnjaka, euercus robur.
SadrZaj ukupnih i netaninskih polifenola i tanina odredivan je spektiofotometrijski,
kori5cenjem Folin-Ciocalteu reagensa', a sadraaj galne kiseline tecnonr
hromatografijom (HPLC)2. Konstatovano je da nakon termicktg tretmana sadrZaj tanina
opada (sa 20,4 na 19,7o ), a znalajno raste kolidina netaninskih polifenola 1sa f ,9 na
4,0oA) i galne kiseline (sa 0,5 na 5 ,loh).
Za procenu antioksidante aktivnosti odredivani su: ukupna antioksidanta
aktivnost, UAA (FRAP test), sposobnost neutralizacije DPPH radikala i inhibitorni
efekat na lipidnu peroksidaciju (LP) u lipozomima (TBA tesr).r
Uzorci QN i QT ispoljili su znadajnu antioksidantnu aktivnost, i to UAA je
iznosila 2,44 i 3,76 pmol F.'*/rg, respektivno. Dobijene vrednosti aktivnosti su oko 2-
3 puta niZe u poredenju sa kvercetinom i vitaminom C. lJzorci eN i eT su
koncentraciono zavisno neutralisali DPPH radikal (IC5s:8,04 i 5,77 pglml) i inhibirali
LP (ICs0:32,13 i I 6,39 ltglml, respektivno).
Veia antioksidantna aktivnost ekstrakta termidki tretiranog semena (eT), moLe
se objasniti veiim sadrZajem galne kiseline, koja se oslobada razgradnjom
hidrolizujucih tanina tokom termidke obrade.",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Influence of thermal treatment on polyphenolic compounds and antioxidant properties of Quercus robur kernels, Uticaj termičkog tretmana na polifenolne sastojke i antioksidantna svojstva semena lužnjaka, Quercus robur",
volume = "56",
number = "5",
pages = "932-933",
url = "https://hdl.handle.net/21.15107/rcub_farfar_789"
}
Rakić, S., Petrović, S., Kukić, J., Jadranin, M.,& Tešević, V.. (2006). Influence of thermal treatment on polyphenolic compounds and antioxidant properties of Quercus robur kernels. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 56(5), 932-933.
https://hdl.handle.net/21.15107/rcub_farfar_789
Rakić S, Petrović S, Kukić J, Jadranin M, Tešević V. Influence of thermal treatment on polyphenolic compounds and antioxidant properties of Quercus robur kernels. in Arhiv za farmaciju. 2006;56(5):932-933.
https://hdl.handle.net/21.15107/rcub_farfar_789 .
Rakić, S., Petrović, Silvana, Kukić, Jelena, Jadranin, Milka, Tešević, Vele, "Influence of thermal treatment on polyphenolic compounds and antioxidant properties of Quercus robur kernels" in Arhiv za farmaciju, 56, no. 5 (2006):932-933,
https://hdl.handle.net/21.15107/rcub_farfar_789 .