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Cebrián-Lloret V, Cartan-Moya S, Martínez-Sanz M, Gómez-Cortés P, Calvo MV, López-Rubio A, Martínez-Abad A. Characterization of the invasive macroalgae Rugulopteryx Okamurae for potential biomass valorisation. Food Chem 2024; 440:138241. [PMID: 38141439 DOI: 10.1016/j.foodchem.2023.138241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 11/15/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
This study aimed to examine the composition and properties of the invasive macroalgae R. okamurae and explore potential applications. The results showed that the seaweed biomass is mainly composed of structural carbohydrates, with alginate being the main constituent, accounting for 32 % of its total composition and with a mannuronic and guluronic acid ratio (M/G) ratio of 0.93. It also has a relatively high concentration of fucose, related to the presence of fucoidans that have important biological functions. Among the mineral contents, a high magnesium and calcium (7107 and 5504 mg/kg) concentration, and the presence of heavy metals above legislated thresholds, were notable. R. okamurae also contained a high lipid content of 17 %, mainly composed of saturated fatty acids, but with a significant fraction of n3 polyunsaturated fatty acids (18 %) resulting in a low n6/n3 ratio (0.31), that has health benefits. The protein content of R. okamurae was 12 %, with high-quality proteins, as essential amino acids (mainly leucine, phenylalanine and valine) constitute 32 % of the total amino acids. It also showed a high polyphenol content and outstanding antioxidant properties (106.88 mg TE/g). Based on these findings, R. okamurae has significant potential as a sustainable source of bioactive compounds that can add value to different sectors, including food, feed, pharmaceuticals and cosmetics.
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Affiliation(s)
- Vera Cebrián-Lloret
- Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, Paterna 46980, Valencia, Spain
| | - Sara Cartan-Moya
- Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, Paterna 46980, Valencia, Spain
| | - Marta Martínez-Sanz
- Department of Bioactivity and Food Analysis, Institute of Food Science Research, CIAL (CSIC-UAM), Nicolás Cabrera, 9, 28049 Madrid, Spain
| | - Pilar Gómez-Cortés
- Department of Bioactivity and Food Analysis, Institute of Food Science Research, CIAL (CSIC-UAM), Nicolás Cabrera, 9, 28049 Madrid, Spain
| | - María Visitación Calvo
- Department of Bioactivity and Food Analysis, Institute of Food Science Research, CIAL (CSIC-UAM), Nicolás Cabrera, 9, 28049 Madrid, Spain
| | - Amparo López-Rubio
- Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, Paterna 46980, Valencia, Spain
| | - Antonio Martínez-Abad
- Food Safety and Preservation Department, IATA-CSIC, Avda. Agustín Escardino 7, Paterna 46980, Valencia, Spain.
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Romero-Vargas A, Fdez-Güelfo LA, Blandino A, Díaz MJ, Díaz AB. Rugulopteryx okamurae: Effect of hydrothermal acid pretreatment on the saccharification process. BIORESOURCE TECHNOLOGY 2023; 388:129721. [PMID: 37730140 DOI: 10.1016/j.biortech.2023.129721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/24/2023] [Accepted: 09/04/2023] [Indexed: 09/22/2023]
Abstract
The biological invasion caused by the invasive macroalga Rugulopteryx okamurae is causing increasing concern in southern Europe. To reduce its impact, this brown alga can be treated from a biorefinery approach. In this study, the macroalga is used as raw material to obtain fermentable sugars, which can be converted into high value-added products. The alga was exposed to hydrothermal and hydrothermal acid pretreatment and the pretreated biomass was used for enzymatic hydrolysis, achieving a hydrolysate with a reducing sugar concentration of almost 25 g/L (49.2% more than with non-pretreated alga). In addition, the combined severity factor was calculated to identify the best pretreatment conditions, finding the optimum in those pretreatments performed with 0.2 N HCl concentration and 15 min reaction time. Based on the results, it would be interesting to carry out new studies using the saccharified medium obtained under optimal conditions to obtain value-added compounds by fermentation.
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Affiliation(s)
- Agustín Romero-Vargas
- Department of Chemical Engineering and Food Technology, Wine and Agrifood Research Institute (IVAGRO), University of Cádiz - International Campus of Excellence (ceiA3), 11510 Puerto Real, Cádiz, Spain.
| | - Luis Alberto Fdez-Güelfo
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, University of Cádiz - International Campus of Excellence (ceiA3), 11510 Puerto Real, Cádiz, Spain.
| | - Ana Blandino
- Department of Chemical Engineering and Food Technology, Wine and Agrifood Research Institute (IVAGRO), University of Cádiz - International Campus of Excellence (ceiA3), 11510 Puerto Real, Cádiz, Spain.
| | - Manuel J Díaz
- Department of Chemical Engineering and Food Technology, Wine and Agrifood Research Institute (IVAGRO), University of Cádiz - International Campus of Excellence (ceiA3), 11510 Puerto Real, Cádiz, Spain.
| | - Ana Belén Díaz
- Department of Chemical Engineering and Food Technology, Wine and Agrifood Research Institute (IVAGRO), University of Cádiz - International Campus of Excellence (ceiA3), 11510 Puerto Real, Cádiz, Spain.
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Felgueiras HP. Green Antimicrobials. Antibiotics (Basel) 2023; 12:1128. [PMID: 37508223 PMCID: PMC10376511 DOI: 10.3390/antibiotics12071128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
In the last couple of years, the awareness of climate change and high pollution levels have raised our sense of ecological responsibility [...].
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Affiliation(s)
- Helena P Felgueiras
- Centre for Textile Science and Technology (2C2T), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal
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