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Antioxidant activity of hazelnut skin phenolics.
J Agric Food Chem. 2009 Jun 10; 57(11):4645-50.JA

Abstract

Phenolic compounds were extracted from hazelnut skin using 80% (v/v) aqueous acetone or methanol. The crude extracts were applied onto a Sephadex LH-20 column for two fractionations (Fr. I and Fr. II). Fr. I consisting of low-molecular-weight phenolics was eluted by ethanol, whereas Fr. II consisting of tannins was obtained using acetone/water (1:1, v/v) as the mobile phase. UV spectra of phenolic compounds present in the crude extracts and their fractions exhibited a maximum absorbance at 282 nm. The crude extracts and their fractions were examined for phenolic and condensed tannin contents as well as total antioxidant activity (TAA), antiradical activity against the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical, and reducing power. Results of these assays showed higher values when Fr. II containing tannins was tested, followed by crude extract, and Fr. I. Both 80% acetone and methanol were capable of extracting phenolics, but 80% acetone was a more effective solvent for the extraction of condensed tannins (p < 0.05). These results suggest that hazelnut skin can be considered as a value-added byproduct for use as dietary antioxidants.

Authors+Show Affiliations

TUBITAK Marmara Research Center, Food Institute, Gebze-Kocaeli, Turkey. cesarettin.alasalvar@mam.gov.trNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19422224

Citation

Alasalvar, Cesarettin, et al. "Antioxidant Activity of Hazelnut Skin Phenolics." Journal of Agricultural and Food Chemistry, vol. 57, no. 11, 2009, pp. 4645-50.
Alasalvar C, Karamać M, Kosińska A, et al. Antioxidant activity of hazelnut skin phenolics. J Agric Food Chem. 2009;57(11):4645-50.
Alasalvar, C., Karamać, M., Kosińska, A., Rybarczyk, A., Shahidi, F., & Amarowicz, R. (2009). Antioxidant activity of hazelnut skin phenolics. Journal of Agricultural and Food Chemistry, 57(11), 4645-50. https://doi.org/10.1021/jf900489d
Alasalvar C, et al. Antioxidant Activity of Hazelnut Skin Phenolics. J Agric Food Chem. 2009 Jun 10;57(11):4645-50. PubMed PMID: 19422224.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Antioxidant activity of hazelnut skin phenolics. AU - Alasalvar,Cesarettin, AU - Karamać,Magdalena, AU - Kosińska,Agnieszka, AU - Rybarczyk,Anna, AU - Shahidi,Fereidoon, AU - Amarowicz,Ryszard, PY - 2009/5/9/entrez PY - 2009/5/9/pubmed PY - 2009/7/29/medline SP - 4645 EP - 50 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 57 IS - 11 N2 - Phenolic compounds were extracted from hazelnut skin using 80% (v/v) aqueous acetone or methanol. The crude extracts were applied onto a Sephadex LH-20 column for two fractionations (Fr. I and Fr. II). Fr. I consisting of low-molecular-weight phenolics was eluted by ethanol, whereas Fr. II consisting of tannins was obtained using acetone/water (1:1, v/v) as the mobile phase. UV spectra of phenolic compounds present in the crude extracts and their fractions exhibited a maximum absorbance at 282 nm. The crude extracts and their fractions were examined for phenolic and condensed tannin contents as well as total antioxidant activity (TAA), antiradical activity against the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical, and reducing power. Results of these assays showed higher values when Fr. II containing tannins was tested, followed by crude extract, and Fr. I. Both 80% acetone and methanol were capable of extracting phenolics, but 80% acetone was a more effective solvent for the extraction of condensed tannins (p < 0.05). These results suggest that hazelnut skin can be considered as a value-added byproduct for use as dietary antioxidants. SN - 1520-5118 UR - https://www.unboundmedicine.com/medline/citation/19422224/Antioxidant_activity_of_hazelnut_skin_phenolics_ L2 - https://doi.org/10.1021/jf900489d DB - PRIME DP - Unbound Medicine ER -