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Title: Portuguese Kelps: Feedstock Assessment for the Food Industry
Authors: Pacheco, Diana 
Miranda, Giuseppe
Rocha, Carolina P. 
Pato, Rosinda L.
Cotas, João 
Gonçalves, Ana M. M. 
Santos, Sandra M. Dias
Bahcevandziev, Kiril 
Pereira, Leonel 
Keywords: brown seaweeds; chemical composition; nutritional value; macro and micronutrients; fatty acids; phenolic compounds
Issue Date: 2021
Project: FCT UIDB/ 04292/2020 (MARE) 
FCT UIDP/50017/2020+UIDB/50017/2020 (CESAM) 
project PORBIOTA—E-Infrastructure Portuguese Information and Research in Biodiversity (POCI-01-0145-FEDER-022127) 
PTDC/BIA-CBI/ 31144/2017-POCI-01project-0145-FEDER-031144-MARINE INVADERS 
ERDF through POCI (Operational Program Competitiveness and Internationalization) and by the Foundation for Science and Technology (FCT, IP). 
Interreg Atlantic Area Pro-gram, under the project NASPA (EAPA_451/2016). 
University of Coimbra contract IT057-18-7253 
project MENU—Marine Macroalgae: Alternative recipes for a daily nutritional diet (FA_05_2017_011), funded by the Blue Fund under Public Notice No. 5—Blue Biotechnology 
Serial title, monograph or event: Applied Sciences (Switzerland)
Volume: 11
Issue: 22
Abstract: Seaweeds have been incorporated in the daily diet of several human cultures since ancient times, due to their nutritional characteristics and healthy properties. The brown seaweeds Undaria pinnatifida, Saccharina latissima, Sacchoriza polyschides, and Laminaria ochroleuca were collected in the Viana do Castelo (Portugal) bay to assess their proximate composition analysis. As a result, the algal biomass was dried, and its moisture and ash content were determined. The dried biomass was then analyzed for total nitrogen/total protein (using the Kjeldahl method), total fiber content (through fiber analyzer digestion), total lipids (in a Soxhlet apparatus), and fatty acid characterization (by gas chromatography-mass spectrometry). Apart from phosphorus, which was analyzed by spectrophotometry, the ashes were employed for mineral and trace element characterization via dry mineralization and quantified using flame atomic absorption spectrometry. Moreover, the total phenolic content was assessed spectrophotometrically by the Folin-Ciocalteu method in the algal aqueous extracts. Analyses showed that their protein concentrations ranged from 12 to 24% dry weight (DW), while lipid concentrations varied between 0.51% and 1.52% DW. Regarding the carbohydrate concentration in these seaweeds, a concentration between 48% and 60% DW was observed. The S. polyschides had the highest overall total phenolic content (6.19 10 3 g GAE/100 g of dried algae), while L. ochroleuca had the lowest amount (3.72 10 3 g GAE/100 g of dried algae). U. pinnatifida had the highest total fatty acid content (35.13 mg/g DW), whereas S. latissima presented the lowest value (22.59 mg/g DW). Significant concentrations of highly unsaturated fatty acids (HUFA) were observed in both seaweeds, with U. pinnatifida having the highest value (10.20 mg/g DW) and S. latissima the lowest content (4.81 mg/g DW). It is also highlighted that these seaweeds have a nutritional relevance as a source of essential nutrients, including nitrogen, potassium, sodium, calcium, magnesium, and iron.
ISSN: 2076-3417
DOI: 10.3390/app112210681
Rights: openAccess
Appears in Collections:I&D MARE - Artigos em Revistas Internacionais

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