Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities
Background: Walnut production (Juglans regia) generates a large amount of waste, mainly comprised of husk and shell. The two by-products have several bioactive compounds, mainly phenolic compounds with antioxidant activity. Given the above, this work seeks to establish productive and adequate condit...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Electronic Journal of Biotechnology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0717345822000161 |
| _version_ | 1811325697791098880 |
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| author | Carmen Soto-Maldonado Eduardo Caballero-Valdés Julissa Santis-Bernal John Jara-Quezada Lida Fuentes-Viveros María Elvira Zúñiga-Hansen |
| author_facet | Carmen Soto-Maldonado Eduardo Caballero-Valdés Julissa Santis-Bernal John Jara-Quezada Lida Fuentes-Viveros María Elvira Zúñiga-Hansen |
| author_sort | Carmen Soto-Maldonado |
| collection | DOAJ |
| description | Background: Walnut production (Juglans regia) generates a large amount of waste, mainly comprised of husk and shell. The two by-products have several bioactive compounds, mainly phenolic compounds with antioxidant activity. Given the above, this work seeks to establish productive and adequate conditions for the recovery of compounds with antioxidant activity (juglone among them) from such discards to use the extract as a bioherbicide. Results: Temperature and extraction solvent (type of solvent and use of hydroalcoholic mixtures) are relevant factors on phenolic compounds’ (TPC, Folin-Ciocalteu method) recovery and antioxidant activity (AA, DPPH method), observing values from 2 to 17 mg GAE/g shell and 0.5 and 23 mg GAE/g husk, and 3 to 28 mg TE/g shell and 0.2–36 mg TE/g husk for TPC and AA, respectively. Using 50°C and ethanol as extraction solvent, 14,000 µmol TE/100 g of ORAC activity was obtained for both shell and husk. This value increased when a hydroalcoholic mixture was used. Juglone was recovered only from the husk at 166 mg/100 g. The bioherbicidal potential of the extract was evaluated; a phytotoxic effect and a lower plantar density when applying the product to broad-leaf weeds were observed. Conclusions: In conclusion, the walnut process’s residues have a high potential to be used under the circular economy concept in the agri-food sector by obtaining products with high added value.How to cite: Soto-Maldonado C, Caballero-Valdés E, Santis-Bernal J, et al. Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities. Electron J Biotechnol 2022;58. https://doi.org/10.1016/j.ejbt.2022.04.005 |
| first_indexed | 2024-04-13T14:37:34Z |
| format | Article |
| id | doaj.art-119ce09d88854299952733cf4bf3abf5 |
| institution | Directory Open Access Journal |
| issn | 0717-3458 |
| language | English |
| last_indexed | 2024-04-13T14:37:34Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Electronic Journal of Biotechnology |
| spelling | doaj.art-119ce09d88854299952733cf4bf3abf52022-12-22T02:42:59ZengElsevierElectronic Journal of Biotechnology0717-34582022-07-01582536Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activitiesCarmen Soto-Maldonado0Eduardo Caballero-Valdés1Julissa Santis-Bernal2John Jara-Quezada3Lida Fuentes-Viveros4María Elvira Zúñiga-Hansen5Centro Regional de Estudios en Alimentos Saludables, Av. Universidad 330, Curauma-Placilla, Valparaíso, Chile; Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, Chile; Corresponding author.Centro Regional de Estudios en Alimentos Saludables, Av. Universidad 330, Curauma-Placilla, Valparaíso, Chile; Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, ChileEscuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, ChileEscuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, ChileCentro Regional de Estudios en Alimentos Saludables, Av. Universidad 330, Curauma-Placilla, Valparaíso, ChileCentro Regional de Estudios en Alimentos Saludables, Av. Universidad 330, Curauma-Placilla, Valparaíso, Chile; Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso, ChileBackground: Walnut production (Juglans regia) generates a large amount of waste, mainly comprised of husk and shell. The two by-products have several bioactive compounds, mainly phenolic compounds with antioxidant activity. Given the above, this work seeks to establish productive and adequate conditions for the recovery of compounds with antioxidant activity (juglone among them) from such discards to use the extract as a bioherbicide. Results: Temperature and extraction solvent (type of solvent and use of hydroalcoholic mixtures) are relevant factors on phenolic compounds’ (TPC, Folin-Ciocalteu method) recovery and antioxidant activity (AA, DPPH method), observing values from 2 to 17 mg GAE/g shell and 0.5 and 23 mg GAE/g husk, and 3 to 28 mg TE/g shell and 0.2–36 mg TE/g husk for TPC and AA, respectively. Using 50°C and ethanol as extraction solvent, 14,000 µmol TE/100 g of ORAC activity was obtained for both shell and husk. This value increased when a hydroalcoholic mixture was used. Juglone was recovered only from the husk at 166 mg/100 g. The bioherbicidal potential of the extract was evaluated; a phytotoxic effect and a lower plantar density when applying the product to broad-leaf weeds were observed. Conclusions: In conclusion, the walnut process’s residues have a high potential to be used under the circular economy concept in the agri-food sector by obtaining products with high added value.How to cite: Soto-Maldonado C, Caballero-Valdés E, Santis-Bernal J, et al. Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities. Electron J Biotechnol 2022;58. https://doi.org/10.1016/j.ejbt.2022.04.005http://www.sciencedirect.com/science/article/pii/S0717345822000161AntioxidantAntioxidant extractionBioherbicidalCircular economyDried fruitsJuglans regia |
| spellingShingle | Carmen Soto-Maldonado Eduardo Caballero-Valdés Julissa Santis-Bernal John Jara-Quezada Lida Fuentes-Viveros María Elvira Zúñiga-Hansen Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities Electronic Journal of Biotechnology Antioxidant Antioxidant extraction Bioherbicidal Circular economy Dried fruits Juglans regia |
| title | Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities |
| title_full | Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities |
| title_fullStr | Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities |
| title_full_unstemmed | Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities |
| title_short | Potential of solid wastes from the walnut industry: Extraction conditions to evaluate the antioxidant and bioherbicidal activities |
| title_sort | potential of solid wastes from the walnut industry extraction conditions to evaluate the antioxidant and bioherbicidal activities |
| topic | Antioxidant Antioxidant extraction Bioherbicidal Circular economy Dried fruits Juglans regia |
| url | http://www.sciencedirect.com/science/article/pii/S0717345822000161 |
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