Proximate Composition and Nutritional Value of Three Macroalgae: Ascophyllum nodosum, Fucus vesiculosus and Bifurcaria bifurcata

AbstractSeaweeds are a valuable potential source of protein, as well as free amino acids (FAAs) with umami flavour which are in high demand by the food industry. The most commonly used flavouring agents in the food industry are chemically synthesised and therefore are subject to concerns regarding their safety and associated consumer resistance. This study focuses on the effects of extraction time (1 and 2 h) and solvents (0.1 M HCl, 1% citric acid and deionised water) on the extraction of protein and FAAs including umami FAAs from Irish brown seaweeds (Ascophyllum nodosum and Fucus vesiculosus). Extraction yields were influenced by both the extraction solvent and time, and also varied according to the seaweed used. Both seaweeds investigated were found to be good sources of protein, FAAs including umami FAAs, demonstrating potential application as flavouring agents in the food industry. Overall, the use of green solvents (deionised water and citric acid) resulted in higher recoveries of compounds compared to HCl. The results of this study will facilitate the use of more sustainable solvents in industry for the extraction of proteins and flavouring agents from seaweed.

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Clinical Efficacy of Brown Seaweeds Ascophyllum nodosum and Fucus vesiculosus in the Prevention or Delay Progression of the Metabolic Syndrome: A Review of Clinical Trials

Molecules ◽

10.3390/molecules26030714 ◽

2021 ◽

Vol 26 (3) ◽

pp. 714

Author(s):

Enver Keleszade ◽

Michael Patterson ◽

Steven Trangmar ◽

Kieran J. Guinan ◽

Adele Costabile

Keyword(s):

Metabolic Syndrome ◽

Clinical Trials ◽

Brown Seaweed ◽

Public Health Problem ◽

Ascophyllum Nodosum ◽

Fucus Vesiculosus ◽

Total Phenolic ◽

World Population ◽

Brown Seaweeds ◽

The Metabolic Syndrome

Metabolic syndrome (MetS) is a global public health problem affecting nearly 25.9% of the world population characterised by a cluster of disorders dominated by abdominal obesity, high blood pressure, high fasting plasma glucose, hypertriacylglycerolaemia and low HDL-cholesterol. In recent years, marine organisms, especially seaweeds, have been highlighted as potential natural sources of bioactive compounds and useful metabolites, with many biological and physiological activities to be used in functional foods or in human nutraceuticals for the management of MetS and related disorders. Of the three groups of seaweeds, brown seaweeds are known to contain more bioactive components than either red and green seaweeds. Among the different brown seaweed species, Ascophyllum nodosum and Fucus vesiculosus have the highest antioxidant values and highest total phenolic content. However, the evidence base relies mainly on cell line and small animal models, with few studies to date involving humans. This review intends to provide an overview of the potential of brown seaweed extracts Ascophyllum nodosum and Fucus vesiculosus for the management and prevention of MetS and related conditions, based on the available evidence obtained from clinical trials.

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Fucose-containing polysaccharides in the brown algae Ascophyllum nodosum and Fucus vesiculosus

Carbohydrate Research ◽

10.1016/s0008-6215(00)83190-0 ◽

1977 ◽

Vol 59 (2) ◽

pp. 531-537 ◽

Cited By ~ 41

Author(s):

Darrell G. Medcalf ◽

Bjørn Larsen

Keyword(s):

Brown Algae ◽

Ascophyllum Nodosum ◽

Fucus Vesiculosus

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Proximate Composition and Its Seasonality of the Mediterranean Green Crab:Carcinus aestuariiNardo, 1847 (Brachyura, Portunidae), in Southern Tunisian Waters (Central Mediterranean)

Journal of Marine Biology ◽

10.1155/2013/989467 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 3

Author(s):

Sonia Baklouti ◽

Abdelkarim Derbali ◽

Khalifa Dhieb ◽

Wassim Kammoun ◽

Othman Jarboui

Keyword(s):

Proximate Composition ◽

Nutritional Value ◽

Central Mediterranean ◽

Potential Health ◽

Lipid Contents ◽

Size Groups ◽

The Mediterranean ◽

And Gender ◽

Edible Parts

The Mediterranean green crabCarcinus aestuariiwas recorded in Tunisian waters several years ago. However, since its record in the Gulf of Gabes, no studies have been carried out about the spread of this crab. Because there is a lack of nutritional information concerning this species, this study aimed to characterize the chemical composition of hepatopancreas and gonads ofCarcinus aestuariiin view of potential health implication for consumers and to determine the seasonal nutritional quality of females and males taken separately for various size groups. In this study, a total of 1399 individuals were collected along the Sfax coast. The nutritional value of various edible parts ofCarcinus aestuariiwas evaluated, and gender differences in terms of edible yield and proximate composition, protein, mineral, lipid, and water content, were compared for season, age, and sex. The biochemical compositions were strongly influenced by sex, age, and seasons. The highest protein and lipid contents were detected in gonads and hepatopancreas of females. Autumn was the season with the highest protein content and lowest fat content. Therefore, people with particular diets constrains should consume the ovaries of females in autumn and it should moderate in winter. The hepatopancreas and gonads from Tunisian waters can be a good source of proteins and mineral.

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