Antioxidant Activity of Hazelnut Skin Phenolics

Alasalvar, Cesarettin; Karamać, Magdalena; Kosińska, Agnieszka; Rybarczyk, Anna; Shahidi, Fereidoon; Amarowicz, Ryszard

doi:10.1021/jf900489d

Cited by 141 publications

(107 citation statements)

References 32 publications

Supporting

Mentioning

102

Contrasting

Order By: Relevance

“…However, it must be remembered that the peanuts, almonds and pine nuts used in the present work had their seed coats removed, and the seed coat may be an important source of phenols. Recent studies by Kornsteiner et al (2006), Arcan and Yemenicioglu (2009) and Alasalvar et al (2009) clearly show the importance of seed coats to the antioxidant activities of nuts.…”

Section: Comparisons Of the Antioxidant Activities Of Different Nutsmentioning

confidence: 98%

“…tannins (Alasalvar et al, 2006(Alasalvar et al, , 2009, resulting from this solvent. Moreover, no significant decreases in EC 50 values (p > 0.05) were observed when the extraction time increased from 24 to 24 + 24 + 24 h. As observed with total phenols, the methanolic extracts showed the lowest antiradical ability, represented by the highest EC 50 values: 12.4-12.8 mg/mL for 24 + 24 and 24 h, respectively.…”

Section: Effect Of Extraction Conditions On Antioxidant Activitymentioning

confidence: 99%

“…Numerous studies have reported the antioxidant activities of extracts obtained from hazelnut kernels (Alasalvar et al, 2006;Shahidi et al, 2007;Oliveira et al, 2008), oils (Arranz et al, 2008;Miraliakbari and Shahidi, 2008) and by-products (Shahidi et al, 2007;Contini et al, 2008;Alasalvar et al, 2009). However, with a few exceptions (Alasalvar et al, 2006;Contini et al, 2008;Alasalvar et al, 2009), most of these studies involved aqueous solutions of ethanol, methanol or acetone extractions with a fixed contact time. Because the solvents used in the extractions, as well as the experimental conditions, might affect the extraction yield, total phenols content and antioxidant activity, studies that compare the effects of different extraction conditions and solvents on the quality and quantity 0926-6690/$ -see front matter © 2010 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hazelnut (Corylus avellana L.) kernels as a source of antioxidants and their potential in relation to other nuts

Delgado

Malheiro

Pereira

et al. 2010

Industrial Crops and Products

View full text Add to dashboard Cite

a b s t r a c tThe present work evaluates the potential of hazelnut kernels as a source of antioxidants to be incorporated into new products. First, the effects of extraction conditions on the isolation of hazelnut kernels' total phenols and antioxidants were evaluated. Six conditions, involving different solvents (water, methanol and aqueous acetone) and contact times, were studied. The highest total phenol contents were obtained with boiling water for 30 min, 44.3 ± 7.7 mg GAE/g extract , and 80% (v/v) aqueous acetone solution for 24 h, 36.2 ± 8.8 mg GAE/g extract . Increasing the contact time for the acetonic extractions did not improve the total phenols content. Regarding antioxidant activity, the highest DPPH-scavenging effect value was obtained with 80% (v/v) aqueous acetone for 24 h with an effective concentration (EC 50 ) equal to 1.12 ± 0.07 mg/mL. When other nuts -walnuts, almonds, pine nuts and peanuts -were extracted under this condition, only walnut extract exhibited higher phenol content (268 ± 32 mg GAE/g extract ), antioxidant activity as measured by reducing power (EC 50 = 0.091 ± 0.015 mg/mL) and free radical scavenging capacity (DPPH assay) (EC 50 = 0.060 ± 0.010 mg/mL) than hazelnut extract. The present work demonstrates that some nuts might be a natural source of bioactive compounds that can be incorporated into new health-related products or be substitutes of synthetic compounds of questionable safety, promoting human health and reducing disease risks.

show abstract

Section: Comparisons Of the Antioxidant Activities Of Different Nutsmentioning

confidence: 98%

Section: Effect Of Extraction Conditions On Antioxidant Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hazelnut (Corylus avellana L.) kernels as a source of antioxidants and their potential in relation to other nuts

Delgado

Malheiro

Pereira

et al. 2010

Industrial Crops and Products

View full text Add to dashboard Cite

show abstract

“…Hazelnut (Corylus avellana L.) belonging to the Betulaceae family is a very popular tree nut worldwide (Alasalvar et al, 2009). With its almost 650,000 metric tons of production Turkey is the largest producer of hazelnuts in the world and provides almost 85% of world hazelnut requirement (Demiryürek, Ceyhan, & Bozoglu, 2012).…”

Section: Introductionmentioning

confidence: 99%

Bioactive, functional and edible film-forming properties of isolated hazelnut (Corylus avellana L.) meal proteins

et al. 2014

View full text Add to dashboard Cite

a b s t r a c tThis study aimed characterization of bioactive, functional and edible film making properties of isolated proteins from untreated (HPI), hot extracted (HPI-H), acetone washed (HPI-AW), and acetone washed and hot extracted (HPC-AW-H) hazelnut meals. The most bioactive protein extract was HPC-AW-H, followed by HPI-AW, HPI-H and HPI, based on antioxidant activity (TEAC and ORAC: 158 e461 mmol Trolox/kg), iron chelation (60.7e126.7 mmol EDTA/kg), angiotensin-converting enzyme inhibition (IC 50 : 0.57e1.0 mg/mL) and antiproliferative activity on colon cancer cells (IC 50 : 3.0e4.6 mg/ ml). Protein contents of HPI, HPI-H and HPI-AW (93.3e94.5%) were higher than that of HPC-AW-H (86.0%), but HPC-AW-H showed the best pH-solubility profile. The extracts showed good oil absorption (7.4e9.4 g/g) and foaming, but limited water holding and gelling capacities, and emulsion stability. The protein extracts gave transparent, yellowish to brownish and reddish colored and water soluble edible films. The HPI gave the lightest colored films with acceptable mechanical properties (elongation up to 144% and tensile strength up to 4.9 MPa). 1-D and 2-D electrophoresis clearly showed the molecular and isoelectric profiles of hazelnut proteins. The overall results of this study showed that the bioactive, solubility and gelation properties of hazelnut proteins could be improved by simple processes like acetone washing and/or heat treatment. The hazelnut proteins are valuable as multipurpose food ingredients.

show abstract

“…by accepting an electron or hydrogen radical to become a stable diamagnetic molecule with discoloration. The degree of discoloration indicates the free radical scavenging potentials of the antioxidant compounds or extracts in terms of hydrogen-donating ability (Alasalvar et al, 2009;Shahidi et al, 2007).…”

Section: Dpph Radical Scavenging Activitymentioning

confidence: 99%

In vitroantioxidant and cytotoxic properties of ethanol extract ofAlpinia oxyphyllafruits

Wang

Yuan

Bao

et al. 2013

Pharmaceutical Biology

View full text Add to dashboard Cite

Context: Alpinia oxyphylla Miquel (Zingiberaceae) is a traditional Chinese herbal medicine widely used for the treatment of intestinal disorders, urosis and diuresis. However, information about antioxidant and cytotoxic properties of its fruits remains to be elucidated. Objective: The ethanol crude extract (CE) and its fractions [petroleum ether fraction (PF), ethyl acetate fraction (EF), n-butanol fraction (BF) and water fraction (WF) extracted by petroleum ether, ethyl acetate, n-butanol and water, respectively] of A. oxyphylla fruits were investigated for their antioxidant activity and cytotoxicity. Materials and methods: The total phenolic content (TPC) and antioxidant activity of the extracts were determined by Folin-Ciocalteu reagent, 1,1-diphenyl-2-picrylhydrazyl (DPPH . ), Trolox equivalent antioxidant capacity and reducing power assay. Cytotoxicity of the extracts (0-200 mg/mL) was tested on six human cancer cell lines (breast cancer cell line, cervix carcinoma cell line, lung adenocarcinoma cell line, liver carcinoma cell line, gastric cancer cell line and colon cancer cell line) using the sulforhodamine B assay. Results: The TPC of extracts varied from 8.2 to 20.3 mg gallic acid equivalents/g dry weight. DPPH radical scavenging effect of extracts decreased in the order of EF4BF4CE4PF4WF, with IC 50 values ranging from 74.7 to 680.8 mg/mL. 2,2-azo-bis(3-Ethylbenzothiazoline-6-sulfoic acid) diammonium salt scavenging activity ranged from 0.118 to 0.236 mmol Trolox equivalence/mg extract. The extracts exhibited concentration-dependent reducing power, and EF showed the highest reducing ability. A satisfactory correlation (R 2 40.826) between TPC and antioxidant activity was observed. In addition, EF, PF and CE exhibited potent anticancer effects on six cancer cell lines with IC 50 values ranging from 40

show abstract

Antioxidant Activity of Hazelnut Skin Phenolics

Cited by 141 publications

References 32 publications

Hazelnut (Corylus avellana L.) kernels as a source of antioxidants and their potential in relation to other nuts

Hazelnut (Corylus avellana L.) kernels as a source of antioxidants and their potential in relation to other nuts

Bioactive, functional and edible film-forming properties of isolated hazelnut (Corylus avellana L.) meal proteins

In vitroantioxidant and cytotoxic properties of ethanol extract ofAlpinia oxyphyllafruits

Contact Info

Product

Resources

About