Percorrer por autor "Soria-Lopez, Anton"
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- Benefits and drawbacks of ultrasound-assisted extraction for the recovery of bioactive compounds from marine algaePublication . Carreira Casais, Anxo; Otero, Paz; Garcia-Perez, Pascual; García-Oliveira, Paula; González Pereira, Antía; Carpena Rodríguez, María; Soria-Lopez, Anton; Simal-Gandara, Jesus; Prieto Lage, Miguel A.The increase in life expectancy has led to the appearance of chronic diseases and interest in healthy aging, in turn promoting a growing interest in bioactive compounds (BCs) and functional ingredients. There are certain foods or products rich in functional ingredients, and algae are one of them. Algae consumption has been nominal in Europe until now. However, in recent years, it has grown significantly, partly due to globalization and the adoption of new food trends. With the aim of obtaining BCs from foods, multiple methods have been proposed, ranging from conventional ones, such as maceration or Soxhlet extraction, to more innovative methods, e.g., ultrasound-assisted extraction (UAE). UAE constitutes a novel method, belonging to so-called green chemistry, that enables the extraction of BCs requiring lower amounts of solvent and energy costs, preserving the integrity of such molecules. In recent years, this method has been often used for the extraction of different BCs from a wide range of algae, especially polysaccharides, such as carrageenans and alginate; pigments, including fucoxanthin, chlorophylls, or -carotene; and phenolic compounds, among others. In this way, the application of UAE to marine algae is an efficient and sustainable strategy to pursue their deep characterization as a new source of BCs, especially suitable for vegetarian and vegan diets.
- Challenges for future food systems: from the Green Revolution to food supply chains with a special focus on sustainabilityPublication . Soria-Lopez, Anton; Garcia-Perez, Pascual; Carpena, Maria; Garcia-Oliveira, Paula; Otero, Paz; Fraga-Corral, Maria; Cao, Hui; Prieto Lage, Miguel A.; Simal-Gandara, JesusFinding a food system to feed the growing worldwide population remains a challenge, especially in the current era, where natural resources are being dramatically depleted. From a historical point of view, the Green Revolution, together with biofortification and sustainable intensification, was established as a possible solution to counter hunger and malnutrition during the second half of the 20th century. As a solution, to overcome the limitations attributed to the Green Revolution, food supply chains were developed. The current food system, based on the long food supply chain (LFSC), is characterized by globalization, promoting several advantages for both producers and consumers. However, LFSC has been demonstrated to be unable to feed the global population and, furthermore, it generates negative ecological, environmental, logistical, and nutritional pressures. Thus, novel efficient food systems are required to respond to current environmental and consumers' demands, as is the case of short food supply chain (SFSC). As a recently emerging food system, the evaluation of SFSC sustainability in terms of environmental, economic, and social assessment is yet to be determined. This review is focused on the evolution of food supply systems, starting from the Green Revolution to food supply chains, providing a significant perspective on sustainability.
- Essential oils and their application on active packaging systems: a reviewPublication . Carpena Rodríguez, María; Núñez Estévez, Bernabé; Soria-Lopez, Anton; Garcia-Oliveira, Paula; Prieto Lage, Miguel A.The food industry is continuously evolving through the application of innovative tools and ingredients towards more effective, safe, natural and ecofriendly solutions to satisfy the demands of the costumers. In this context, natural sources (i.e., leaves, seeds, peels or unused pulp) can entail a valuable source of compounds, such as essential oils (EOs), with recognized antioxidant and antimicrobial properties that can be used as natural additives in packaging applications. The current trend is the incorporation of EOs into diverse kinds of biodegradable materials, such as edible films, thus developing active packaging systems with improved preservation properties that can offer benefits to both the food and packaging industry by reducing food waste and improving the management of packaging waste. EOs may be added into the packaging material as free or encapsulated molecules, where, especially this last option, has been revealed as very promising. The addition of these lipophilic compounds provides to the end-product various bioactivities of interest, which can eventually extend the shelf-life of the product by preventing food spoilage. Pairing biodegradable packaging with EOs extracted from natural agro-industrial by-products can lead to a more sustainable food industry. Recent knowledge and advances on this issue will be reviewed in the present work.
- Fucoxanthin’s optimization from undaria pinnatifida using conventional heat extraction, bioactivity assays and in silico studiesPublication . Lourenço-Lopes, Catarina; Fraga-Corral, Maria; Soria-Lopez, Anton; Núñez Estévez, Bernabé; Barral Martínez, Marta; Silva, Aurora; Li, Ningyang; Liu, Chao; Simal-Gandara, Jesus; Prieto Lage, Miguel A.Brown macroalgae are a potential source of natural pigments. Among them, Undaria pinnatifida is recognized for its high concentration of fucoxanthin (Fx), which is a pigment with a wide range of bioactivities. In this study, three independent parameters were optimized for conventional heat extraction (CHE) to maximize the recovery of Fx from Undaria pinnatifida. Optimal conditions (temperature = 45 °C, solvent = 70%, and time = 61 min) extracted 5.1 mg Fx/g dw. Later, the bioactivities of the Fx-rich extracts (antioxidant, antimicrobial, and neuroprotective) were assessed using in vitro and in silico approaches. In vitro assays indicated that Fx has a strong antioxidant capacity and even stronger antimicrobial activity against gram-positive bacteria. This data was supported in silico where Fx established a high binding affinity to DR, a Staphylococcus aureus protein, through aa ALA-8, LEU-21, and other alkane interactions. Finally, the in vitro enzymatic inhibition of AChE using Fx, was further supported using docking models that displayed Fx as having a high affinity for aa TYR72 and THR 75; therefore, the Fx extraction behavior explored in this work may reduce the costs associated with energy and solvent consumption. Moreover, this paper demonstrates the efficiency of CHE when recovering high amounts of Fx from Undaria pinnatifida. Furthermore, these findings can be applied in different industries.
- Plant antioxidants from agricultural waste: synergistic potential with other biological properties and possible applicationsPublication . Carpena Rodríguez, María; García-Oliveira, Paula; González Pereira, Antía; Soria-Lopez, Anton; Chamorro Rivo, Franklin Noel; Collazo, Nicolas; Jarboui, Amira; Simal-Gandara, Jesus; Prieto Lage, Miguel A.The increasing world population entails a great necessity to produce large amounts of food, leading to an increase in organic waste. Unlike traditional agriculture, based on the circular sustainability, modern agriculture produces tons of residues, which are accumulated in landfills or, in some cases, burnt. Numerous studies have demonstrated that agricultural residues are rich in bioactive compounds, particu- larly phenolic compounds, with antioxidant properties. Antioxidant activity has been widely related with protective effects and prevention potential for different diseases. Also, the scavenging and protective effects of antioxidant compounds have shown a connection and synergistic effect with other biological properties, such as anti-inflammatory, anti-tumor, anti-aging, neuroprotective, cardio- protective, or antidiabetic. These compounds can be applied in several fields, including food, cosmetic, and pharmaceutical industry. This chapter will be focused on the interconnected bioactive properties and possible applications of plant-origin compounds with antioxidant potential to valorize different agricultural waste.
- Red seaweeds as a source of nutrients and bioactive compounds: Optimization of the extractionPublication . Carpena Rodríguez, María; Caleja, Cristina; Pereira, Eliana; Pereira, Carla; Ćirić, Ana; Soković, Marina; Soria-Lopez, Anton; Fraga-Corral, Maria; Simal-Gandara, Jesus; Ferreira, Isabel C.F.R.; Barros, Lillian; Prieto Lage, Miguel A.The present work aimed to determine the nutritional composition (ash, protein, fat, carbohydrate content and energy value), phenolic compounds, pigments and organic acids content of three typical red algae from the Northwest of Spain: Chondrus crispus, Mastocarpus stellatus, and Gigartina pistillata; as well as their antioxidant and antimicrobial activities. Furthermore, the present work compared two extraction techniques: conventional heat assisted extraction (HAE) and high pressure assisted extraction (HPAE) to maximize the yield and the concentration of target compounds. Different independent variables were considered for the response study. Time (t) and percentage of ethanol of the solvent (S) were chosen for both techniques and temperature (T) and pressure (P) were used for HAE and HPAE, respectively. The experiments were designed following a response surface methodology (RSM) approach. The obtained results showed a similar nutritional composition between algae samples: low-fat content and high content of proteins, carbohydrates and energy. All tested algae showed good antioxidant and antimicrobial properties. Finally, HEA demonstrated to be the most efficient extraction technique. This study confirms the potential of red algae to be part of the human diet as a source of non-animal protein, due to its nutritional content, phenolic profile, pigments concentration and bioactive properties, which proves that HAE is the optimum technique for the extraction maximization.
- Seaweed polysaccharides: emerging extraction technologies, chemical modifications and bioactive propertiesPublication . Otero, Paz; Carpena Rodríguez, María; Garcia-Oliveira, Paula; Echave Álvarez, Javier; Soria-Lopez, Anton; García-Pérez, Pascual; Fraga-Corral, Maria; Cao, Hui; Nie, Shaoping; Xiao, Jianbo; Simal-Gandara, Jesus; Prieto Lage, Miguel A.Nowadays, consumers are increasingly aware of the relationship between diet and health, showing a greater preference of products from natural origin. In the last decade, seaweeds have outlined as one of the natural sources with more potential to obtain bioactive carbohydrates. Numerous seaweed polysaccharides have aroused the interest of the scientific community, due to their biological activities and their high potential on biomedical, functional food and technological applications. To obtain polysaccharides from seaweeds, it is necessary to find methodologies that improve both yield and quality and that they are profitable. Nowadays, environmentally friendly extraction technologies are a viable alternative to conventional methods for obtaining these products, providing several advantages like reduced number of solvents, energy and time. On the other hand, chemical modification of their structure is a useful approach to improve their solubility and biological properties, and thus enhance the extent of their potential applications since some uses of polysaccharides are still limited. The present review aimed to compile current information about the most relevant seaweed polysaccharides, available extraction and modification methods, as well as a summary of their biological activities, to evaluate knowledge gaps and future trends for the industrial applications of these compounds. Key teaching points: Structure and biological functions of main seaweed polysaccharides. Emerging extraction methods for sulfate polysaccharides. Chemical modification of seaweeds polysaccharides. Potential industrial applications of seaweed polysaccharides. Biological activities, knowledge gaps and future trends of seaweed polysaccharides.
- Single-cell proteins obtained by circular economy intended as a feed ingredient in aquaculturePublication . González Pereira, Antía; Fraga-Corral, Maria; Garcia-Oliveira, Paula; Otero, Paz; Soria-Lopez, Anton; Cassani, Lucia; Cao, Hui; Xiao, Jianbo; Prieto Lage, Miguel A.; Simal-Gandara, JesusThe constant increment in the world's population leads to a parallel increase in the demand for food. This situation gives place the need for urgent development of alternative and sustainable resources to satisfy this nutritional requirement. Human nutrition is currently based on fisheries, which accounts for 50% of the fish production for human consumption, but also on agriculture, livestock, and aquaculture. Among them, aquaculture has been pointed out as a promising source of animal protein that can provide the population with high-quality protein food. This productive model has also gained attention due to its fast development. However, several aquaculture species require considerable amounts of fish protein to reach optimal growth rates, which represents its main drawback. Aquaculture needs to become sustainable using renewable source of nutrients with high contents of proteins to ensure properly fed animals. To achieve this goal, different approaches have been considered. In this sense, single-cell protein (SCP) products are a promising solution to replace fish protein from fishmeal. SCP flours based on microbes or algae biomass can be sustainably obtained. These microorganisms can be cultured by using residues supplied by other industries such as agriculture, food, or urban areas. Hence, the application of SCP for developing innovative fish meal offers a double solution by reducing the management of residues and by providing a sustainable source of proteins to aquaculture. However, the use of SCP as aquaculture feed also has some limitations, such as problems of digestibility, presence of toxins, or difficulty to scale-up the production process. In this work, we review the potential sources of SCP, their respective production processes, and their implementation in circular economy strategies, through the revalorization and exploitation of different residues for aquaculture feeding purposes. The data analyzed show the positive effects of SCP inclusion in diets and point to SCP meals as a sustainable feed system. However, new processes need to be exploited to improve yield. In that direction, the circular economy is a potential alternative to produce SCP at any time of the year and from various cost-free substrates, almost without a negative impact.