96 documents found, page 1 of 10
The Vibrant Spectra of the Oceans: Unravelling the Diversity, Functions, and Ap...
Freitas, Marta V.; Afonso, Clélia; Pereira, Leonel; Mouga, TeresaSeaweeds are photosynthetic organisms that harvest sunlight and convert it into essential energy through a highly effective biochemical process powered by light, which in turn is captured and directed to the reactive centers by pigments. Seaweed pigments are fundamental to the seaweed photosynthetic process and are also responsible for their current taxonomic classification into three distinct divisions. The Ch...
Seaweed-derived biochar for effective treatment of dye-contaminated wastewater
Dias, Ana Paula Soares; Santos, Francisco Ascenção; Rijo, Bruna; Simes, Dina; Pereira, Leonel; Pereira, Manuel Francisco CostaFreshwater scarcity is a growing concern, exacerbated by industrial effluents containing dyes and other pollutants that endanger aquatic ecosystems. This study explores the potential of biochar sorbents, derived from renewable seaweed biomass, as a sustainable solution for water decontamination. Seaweed biomass (sarga & ccedil;o), collected from Portuguese seashores, was carbonized at 300 degrees C and 400 degr...
Seaweed Proteins: A Step towards Sustainability?
Pereira, Leonel; Cotas, João; Gonçalves, Ana MartaThis review delves into the burgeoning field of seaweed proteins as promising alternative sources of protein. With global demand escalating and concerns over traditional protein sources' sustainability and ethics, seaweed emerges as a viable solution, offering a high protein content and minimal environmental impacts. Exploring the nutritional composition, extraction methods, functional properties, and potential...
Seaweeds as Nutraceutical Elements and Drugs for Diabetes Mellitus: Future Pers...
Cotas, João; Lomartire, Silvia; Pereira, Leonel; Valado, Ana; Marques, J.; Gonçalves, Ana MartaDiabetes mellitus is a chronic metabolic condition marked by high blood glucose levels caused by inadequate insulin synthesis or poor insulin use. This condition affects millions of individuals worldwide and is linked to a variety of consequences, including cardiovascular disease, neuropathy, nephropathy, and retinopathy. Diabetes therapy now focuses on controlling blood glucose levels through lifestyle changes...
Detection of Clostridium botulinum in Some Egyptian Fish Products, Its Control ...
Hamad, Gamal; Hafez, Elsayed E.; Sobhy, Sherien E.; Mehany, Taha; Elfayoumy, Reham A.; Elghazaly, Eman M.; Eskander, Michael; Tawfik, Rasha G.This study aims to detect Clostridium botulinum and its control using natural leaf extracts of Citrus limon, Citrus sinensis, and Citrus unshiu in Egyptian fish products, e.g., canned tuna, canned sardine, canned mackerel, fesikh, moloha, and renga, as well the application of C. limon in tuna. Moreover, the antibacterial activity of the C. limon leaf extract was also estimated. In the water extract, ascorbic ac...
Potential Activity of Arthrospira platensis as Antioxidant, Cytotoxic and Antif...
Gheda, Saly; Abd El-Zaher, Eman H. F.; Abou-Zeid, Alaa M.; Bedair, Nesma A.; Pereira, LeonelThis research evaluated the antifungal effectiveness of Arthrospira platensis ethanol, methanol, ethyl acetate and acetone extracts against the tested pathogenic fungi (Candida albicans, Trichophyton rubrum and Malassezia furfur). Antioxidant and cytotoxicity effectiveness of A. platensis extracts against four distinct cell lines were also assessed. Methanol extract of A. platensis exhibited the highest inhibit...
Antioxidant and Antidiabetic Activity of Algae
Abo-Shady, Atef Mohamed; Gheda, Saly Farouk; Ismail, Gehan Ahmed; Cotas, João; Pereira, Leonel; Abdel-Karim, Omnia HamdyCurrently, algae arouse a growing interest in the pharmaceutical and cosmetic area due to the fact that they have a great diversity of bioactive compounds with the potential for pharmacological and nutraceutical applications. Due to lifestyle modifications brought on by rapid urbanization, diabetes mellitus, a metabolic illness, is the third largest cause of death globally. The hunt for an efficient natural-bas...
Therapeutic Potential of Polyphenols and Other Micronutrients of Marine Origin
Pereira, Leonel; Cotas, JoãoPolyphenols are compounds found in various plants and foods, known for their antioxidant and anti-inflammatory properties. Recently, researchers have been exploring the therapeutic potential of marine polyphenols and other minor nutrients that are found in algae, fish and crustaceans. These compounds have unique chemical structures and exhibit diverse biological properties, including anti-inflammatory, antioxid...
Stability of macroalgal assemblage in the mangrove swamp as an indicator for th...
Rashedy, Sarah H.; Hamed, El sayed A.E.; El-Manawy, Islam M.; Pereira, LeonelMangrove ecosystems support diverse macroalgal assemblages, which are primary producers. Community composition, percentage cover of macroalgae, and physicochemical parameters of seawater were studied at two mangrove areas in the Red Sea, Egypt, from November 2020 to October 2021. In addition, we sought to study changes in the relative densities of macroalgal species of the Red Sea in the two studied areas by us...
Seaweed Polysaccharides in Agriculture: A Next Step towards Sustainability
Mamede, Mariana; Cotas, João; Bahcevandziev, Kiril; Pereira, LeonelThe seaweed-based biostimulants available in the market are proven to achieve better results than synthetic commercial fertilizers in plant growth parameters. There are many compounds present in seaweeds that are responsible for the plant bioactivities. Seaweed polysaccharides, such as agar, alginate, and carrageenan, make up most of the seaweed biomass and are proven to achieve excellent results in agricultura...