Extraction of natural antioxidants from hazelnut (Corylus avellana L.) shell and skin wastes by long maceration at room temperature

Contini, Marina; Baccelloni, Simone; Massantini, Riccardo; Anelli, G.

doi:10.1016/j.foodchem.2008.02.060

Cited by 182 publications

(140 citation statements)

References 22 publications

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“…The significant decrease observed with methanol for 24 + 24 h may have been caused by its increased capacity to solubilize a higher quantity of foreign substances, leading to the lowest phenol content among the extracts. Similar results were reported by Contini et al (2008), who analyzed several types of hazelnut by-products. They extracted hazelnut shell waste, the skin waste of whole roasted hazelnuts and the skin waste of chopped hazelnuts with 80% (v/v) aqueous methanol, ethanol or acetone, and found that the methanolic solvent was undoubtedly the least suitable.…”

Section: Influence Of the Experimental Conditions On The Extraction Osupporting

confidence: 89%

“…4 paper ; (3) 5 g of chopped hazelnuts was processed as described in Condition 2, but with an additional extraction with 100 mL of methanol for 24 h, with the supernatants combined. This assay was reported as 24 + 24 h; (4-6) 6 g of chopped hazelnuts was extracted with 60 mL of 80% (v/v) of aqueous acetone, as described in Contini et al (2008), for 24 h (4), 24 + 24 h (5) and 24 + 24 + 24 h (6). All the residues were re-extracted.…”

Section: Extraction Conditionsmentioning

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%

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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

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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.

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Section: Influence Of the Experimental Conditions On The Extraction Osupporting

confidence: 89%

Section: Extraction Conditionsmentioning

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

“…Delgado et al (2010) also reported total phenolic contents with boiling water for 30 min, of 44.3 ± 7.7 mg GAE/g extract, and with 80 % (v/v) aqueous acetone solution for 24 h, 36.2 ± 8.8 mg GAE/g extract was reported. Contini et al (2008) examined total phenolic contents of woody hardshell, a byproduct from C. avellana. The phenolic contents were ranged from 56.6 to 72.2 mg GAE/g extract in different solvents.…”

Section: Assessment Of Total Phenolic Contentsmentioning

confidence: 99%

Antioxidant properties and UPLC–MS/MS profiling of phenolics in jacquemont’s hazelnut kernels (Corylus jacquemontii) and its byproducts from western Himalaya

Kumar

Koundal

et al. 2016

J Food Sci Technol

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A rapid and selective analytical method was developed to simultaneously quantify seven polyphenolic compounds (gallic acid, catechin, epicatechin, quercetin, kaempferol, syringic acid and p-coumaric acid). 15 phenolics of diverse groups in 80 % ethanolic extracts of jacquemont's hazelnut (Corylus jacquemontii) kernels and its byproducts from western Himalaya using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS) were identified. The developed analytical method showed excellent linearity, repeatability and accuracy. Total phenols concentrations were found to be 4446, 1199 and 105 mg gallic acid equivalent (GAE)/Kg of dried extract for jacquemont's hazelnut skin, hard shell and kernels respectively. Antioxidant potential of defatted, raw jacquemont's hazelnut skin, hard shell and kernel extracts assessed by 2,2 0 -azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), 2,2 0 -diphenyl-1-picrylhydrazyl (DPPH) methods were increased in a dose-dependent manner. The IC 50 values were observed as 23.12, 51.32, 136.46 and 45.73, 63.65, 169.30 lg/ml for jacquemont's hazelnut skin, hard shell, kernels by DPPH and ABTS assays, respectively. The high phenolic contents in jacquemont's hazelnut skin contributed towards their free radical scavenging capacities.

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“…Considering the composition of natural sources of phenolic compounds, as well as their structure and physicochemical properties, a universal extraction protocol is not conceivable and a specific extraction procedure must be designed and optimized for each phenolic source (Contini et al, 2008;Thoo et al, 2010). In the present research, ethanol and water were adopted as the extraction media because of their environmentally friendly effects and non-toxicity for human health.…”

Section: Introductionmentioning

confidence: 99%

Optimization of extraction of phenolics from leaves of Ficus virens

Chen

Chai

et al. 2013

J. Zhejiang Univ. Sci. B

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Abstract:In this research, the conditions for extraction of phenolics from leaves of Ficus virens were optimized using response surface methodology (RSM). The extraction abilities of phenolics (EAP) and flavonoids (EAF), the 2,2-diphenyl-1-pierylhydrazyl (DPPH) free-radical scavenging potential, and the ferric reducing/antioxidant power (FRAP) were used as quality indicators. The results of single-factor experiments showed that temperature, ethanol concentration, extraction time, and the number of extraction cycles were the main influencing variables, and these provided key information for the central composite design. The results of RSM fitted well to a second degree polynomial model and more than 98% of the variability was explained. The ideal extraction conditions for EAP, EAF, DPPH free-radical scavenging potential, and FRAP were obtained. Considering the four quality indicators overall, the ideal extraction conditions were 58% ethanol at 57 °C for 37 min with three extraction cycles. At the ideal extraction conditions, the values of EAP, EAF, DPPH free-radical scavenging potential, and FRAP were 5.72%, 3.09%, 58.88 mg ascorbic acid equivalent (AAE)/g dry weight (DW), and 15.86 mg AAE/g DW, respectively. In addition, linear correlations were observed between EAP, EAF, and antioxidant potential.

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Extraction of natural antioxidants from hazelnut (Corylus avellana L.) shell and skin wastes by long maceration at room temperature

Cited by 182 publications

References 22 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

Antioxidant properties and UPLC–MS/MS profiling of phenolics in jacquemont’s hazelnut kernels (Corylus jacquemontii) and its byproducts from western Himalaya

Optimization of extraction of phenolics from leaves of Ficus virens

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