Antimicrobial and antioxidative enrichment of oak (Quercus robur) bark by rotation planar extraction using ExtraChrom®

Andrenšek, Samo; Simonovska, Breda; Vovk, Irena; Fyhrquist, Pia; Vuorela, Heikki; Vuorela, Pia

doi:10.1016/j.ijfoodmicro.2003.09.009

Cited by 49 publications

(38 citation statements)

References 21 publications

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“…It has been previously reported that the methanol extracts of Quercus ilex leaves from Turkey (Güllüce et al, 2004) and Quercus robur bark (Andrensek et al, 2004) possess antibacterial activity which can be related to the richness of Quercus species extracts on phenolic compounds (Ohemeng et al, 1993) such flavonoïds and tannins (Zhentian et al, 1999;Meng et al, 2001;Hideyuki et al, 2002).…”

Section: Introductionmentioning

confidence: 97%

Antibacterial activity of Quercus ilex bark's extracts

Berahou

Auhmani

Fdil

et al. 2007

Journal of Ethnopharmacology

116

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Section: Introductionmentioning

confidence: 97%

Antibacterial activity of Quercus ilex bark's extracts

Berahou

Auhmani

Fdil

et al. 2007

Journal of Ethnopharmacology

116

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“…Andrenšek et al [18] also pointed out that Q. robur cortex is a promising plant material as the source of antioxidative and antimicrobial activity.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Characterization of Oak Extracts Combining Spectrophotometric Assays and Chemometrics

Popović

Štajner

Ždero

et al. 2013

The Scientific World Journal

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Antioxidant characteristics of leaves, twigs, and acorns from two Serbian oak species Quercus robur L. and Quercus petraea L. from Vojvodina province (northern Serbia) were investigated. 80% ethanol (in water) extracts were used for antiradical power (ARP) determinations against DPPH•, •NO, and O2 •− radicals, ferric reducing antioxidant power (FRAP), total phenol, tannin, flavonoid, and proanthocyanidin contents. Permanganate reducing antioxidant capacity (PRAC) was determined using water extracts. Beside, mentioned parameters, soluble proteins, lipid peroxidation (LP), pigments and proline contents were also determined. The data of different procedures were compared and analyzed by multivariate techniques (correlation matrix calculation and principal component analysis (PCA)). PCA found that investigated organs of two different oak tree species possess similar antioxidant characteristics. The superior antioxidant characteristics showed oak leaves over twigs and acorns and seem to be promising source of antioxidants with possible use in industry and pharmacy.

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“…The seeds are used in the treatment of diarrhoea, menorrhagia and gastrointestinal hypertrophy. It has been reported that different species of Quercus possess antibacterial activity [15,16], antioxidant activity [17-19] and gastroprotective effect [20]. The galls of Quercus are used particularly for the treatment of wounds or burns associated with bacterial infections [21].…”

Section: Introductionmentioning

confidence: 99%

Isolation of antibacterial compounds from Quercus dilatata L. through bioassay guided fractionation

Jamil

Haq

Mirza

et al. 2012

Ann Clin Microbiol Antimicrob

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BackgroundFour medicinal plants (Chrozophora hierosolymitana Spreng, Chrysanthemum leucanthemum L., Ephedra gerardiana Wall. ex Stapf, and Quercus dilatata L.) used by indigenous healers to treat various infectious diseases were selected for the present study. The major objective of the present study was isolation and characterization of antimicrobial components from the crude plant extracts using bioassay guided fractionation.MethodsSeven methanolic extracts of the four plants were screened to identify any antimicrobial agents present in them. The active crude plant extract was fractionated first by solvent partitioning and then by HPLC. Characterization of the active fractions was done by using spectrophotometer.ResultsAll the seven methanolic extracts showed low antifungal activity, however, when these extracts were tested for antibacterial activity, significant activity was exhibited by two extracts. The extract of aerial parts of Q. dilatata was most active and therefore, was selected for further analysis. Initially fractionation was done by solvent-solvent partitioning and out of six partitioned fractions, ethanol fraction was selected on the basis of results of antibacterial activity and phytochemical analysis. Further, fractionation was carried out by RP- HPLC and purified active subfractions were characterized by comparing their absorption spectra with that of the known natural products isolated from the plants of Quercus genus.Discussion and conclusionThe results suggest that this is the first report of the isolated antibacterial compounds from this genus.

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Antimicrobial and antioxidative enrichment of oak (Quercus robur) bark by rotation planar extraction using ExtraChrom®

Cited by 49 publications

References 21 publications

Antibacterial activity of Quercus ilex bark's extracts

Antibacterial activity of Quercus ilex bark's extracts

Antioxidant Characterization of Oak Extracts Combining Spectrophotometric Assays and Chemometrics

Isolation of antibacterial compounds from Quercus dilatata L. through bioassay guided fractionation

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