The polyphenol content in the brown algae of the Barents, White Seas, as well as the water areas of the Northwest Atlantic (the Norwegian Sea, the Faxflow bay of the Atlantic Ocean) located in Russia, Norway, Greenland, and Iceland are compared. Algae of the following species were used for this study: Fucus vesiculosus, Fucus spiralis, Fucus serratus, Ascophyllum nodosum, Fucus evanescens. It was found that the most productive raw materials for the extraction of polyphenolic compounds are brown algae F. vesiculosus, growing in Zavalishin Bay of the Barents Sea (Russia): the highest polyphenol content (14.4%) in the summer of 2019 was noted here. Polyphenols detected in F. vesiculosus in the summer from the White Sea on about. Great burnt (13.3%) (Russia), as well as in the Norwegian Sea, Cape Sydspissen (11.6%) (Norway). The minimum content of polyphenols was found in F. spiralis (0.7% dry mass) on the coast of Iceland (Faxflow bay), a low content of polyphenols was characteristic of all types of algae from this location (0.7–2.4%). Three-way analysis of variance (MANOVA) on the example of three types of algae (F. vesiculosus, F. spiralis, A. nodosum) showed that all the studied factors (place of collection, type of algae, fertile phase) are significant. The most significant factor affecting the accumulation of polyphenols by brown algae is the location of algae growth.
The high content of polyphenols in the types of algae we studied from Russian water areas allows us to recommend their use as food and medicinal raw materials, as well as raw materials for biologically active additives.
The coast of the Arctic seas is rich in reserves of brown algae, which are a source of valuable pharmaceutical substances, in particular polyphenols. The study compared the contents of the total polyphenols of the algae Fucus vesiculosusfrom the Barents, White, Norwegian seas and the Irminger Sea (the western coast of Iceland). A comprehensive extraction technique is proposed and itseffectiveness is shown. Promising areas for the extraction of raw materials with the highest polyphenol content have been identified.
In the coastal waters of the Arctic, the most common species of Fucoids are Fucus vesiculosus, Fucus spiralis, and Ascophyllum nodosum. It was reported that bioactive compounds present in brown algae (such as polyphenols, polysaccharides, proteins, amino acids, etc.) have a variety of biological properties: antioxidant, antiviral, antibacterial, anticoagulant, etc. Extraction of biologically active substances from macroalgae in order to obtain products with the necessary properties is based on several factors: the chemical composition of the raw material, which depends on the conditions of the collection sites, as well as the nature of the solvent, the extraction method, etc. This paper presents the results of a comparative study of extracts from three Fucaceae family species collected on the coast of the Barents Sea and the Irminger Sea (West Iceland) for polyphenol content. The antioxidant activity of the extracts was also determined by reaction with 2,2-diphenyl-1-picrylhydrazyl (DPPH). It was shown that the content of polyphenols in extracts depends on the places of collection of algae, and their antioxidant activity does not differ significantly, which suggests the presence of other antioxidants in the extracts.
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