6 documents found, page 1 of 1
Seasonal nutritional profile of Gelidium corneum (Rhodophyta, Gelidiaceae) from...
Cavaco, Mário; Duarte, Adriana; Freitas, Marta; Afonso, Clélia; Bernardino, Susana M.; Pereira, Leonel; Martins, Mendelson; Mouga, TeresaGelidium corneum is a well-known agarophyte, harvested worldwide for its high agar quality. However, the species also exhibits an interesting nutritional profile, but with seasonal variations. Therefore, to evaluate the nutritional value of G. corneum, ash, crude protein, total lipids, and carbohydrates were analyzed at different times of the year. The heavy metals mercury, arsenic, lead, cadmium, and tin, as w...
Enhancement of the antioxidant and antimicrobial activities of porphyran throug...
Adão, Pedro; Reboleira, João; Teles, Marco; Santos, Beatriz; Ribeiro, Nádia; Teixeira, Carlos M.; Guedes, Mafalda; Pessoa, João CostaThe chemical modification of porphyran hydrocolloid is attempted, with the objective of enhancing its antioxidant and antimicrobial activities. Sulfated galactan porphyran is obtained from commercial samples of the red algae Porphyra dioica using Soxhlet extraction with water at 100ºC and precipitation with isopropyl alcohol. The extracted porphyran is then treated with modified L-tyrosines in aqueous medium in...
Poultry shelf-life enhancing potential of nanofibers and nanoparticles containi...
Reboleira, João; Adão, Pedro; Guerreiro, Sara F.C.; Dias, Juliana R.; Ganhão, Rui; Mendes, Susana; Andrade, Mariana; Vilarinho, FernandaAqueous extracts of commercially available red macroalgae Porphyra dioica were integrated as inner coatings of food-grade polypropylene (PP) films through use of electrospinning and electrospraying technologies. Two coating formulations (A = 5 wt% P. dioica extract and 7.5 wt% polyvinyl alcohol (PVA); B = 1 wt% P. dioica extract, 1 wt% PVA, and 17% gelatine) were evaluated as to their capacity to delay spoilage...
Response surface methodology in the optimization of extraction conditions for G...
Reboleira, João; Andrade, Mariana A.; Sanches-Silva, Ana; Ganhão, Rui; Mendes, Susana; Vilarinho, Fernanda; Félix, Rafael; Pinheiro, JoaquinaIncorporation of antioxidant agents in edible films and packages often relies in the usage of essential oils and other concentrated hydrophobic liquids, with reliable increases in antimicrobial and antioxidant activities of the overall composite, and consequent improvements in product shelf life. These oils are often obtained from plant sources and the usage of organic solvents in their extraction has been crit...
Assessment of traditional mayonnaise enriched with Aurantiochytrium sp. extract
Pinheiro, Joaquina; Garcia, Adriana; Paulo, Maria; Coutinho, Joana; Baptista, Teresa; Bernardino, Susana M.; Tecelão, Carla; Gil, Maria M.Mayonnaise, a food product widely consumed since the 1900s, traditionally prepared from a mixture of oil, egg yolk and vinegar, has a reduced shelf-life primarily due to lipid oxidation (Kwon et al., 2015). The addition of synthetic antioxidants like BHT (butylated hydroxytoluene), BHA (butylated hydroxyl anisole), and EDTA (ethylenediaminetetraacetic acid) has been used to control this problem (Gray, 1978). Ho...
Bioactivity screening of Aurantiochytrium sp. for antioxidant activities
Pinheiro, Joaquina; Garcia, Adriana; Paulo, Maria; Coutinho, Joana; Baptista, Teresa M.; Bernardino, Susana M.; Tecelão, Carla; Gil, Maria M.Aurantiochytrium sp. is a heterotrophic microalgae that, in certain growth conditions, besides producing significant amounts of squalene, may potentially produce other bioactive compounds with high value and commercial interest such as docosahexaenoic acid (DHA), carotenoids, among others. Antioxidant compounds, naturally occurring in microalgae sources, have been identified as free radical or active oxygen sca...