scholarly journals Роль водорослей-макрофитов в биоремедиации от нефтепродуктов Кольского залива Баренцева моря

2021 ◽  
Vol 6 (3) ◽  
pp. 35-43
Author(s):  
Г. М. Воскобойников ◽  
С. В. Малавенда ◽  
Л. О. Метелькова
Keyword(s):  
Ascophyllum Nodosum ◽  
Fucus Vesiculosus ◽  
Saccharina Latissima ◽  
Palmaria Palmata

Выполнена оценка вклада макроводорослей в очистку от дизельного топлива Кольского залива Баренцева моря. В основу расчётов положены результаты: 1) экспедиционных наблюдений последних лет о запасах, распределении и биомассе водорослей-макрофитов отделов Chlorophyta и Rhodophyta и класса Phaeophyceae из отдела Ochrophyta, обитающих в трёх частях залива; 2) лабораторных исследований по способности макроводорослей Ascophyllum nodosum, Fucus vesiculosus, F. distichus, F. serratus, Saccharina latissima, Palmaria palmata и Ulvaria obscura к нейтрализации токсического действия дизельного топлива. Показано, что общий вклад у исследованных водорослей в биоремедиацию от дизельного топлива в заливе составляет 312 кг в сутки. Выявлены различия в поглощающей способности у водорослей-макрофитов. Так, наиболее эффективно процесс осуществляет S. latissima, минимальная эффективность участия в биоремедиации определена у U. obscura. Сделан вывод о том, что имеющиеся литоральные и сублиторальные заросли морских макроводорослей Кольского залива являются важным элементом в процессе профилактической, повседневной очистки вод залива от нефтепродуктов. Включение в расчёты данных о способности к нейтрализации дизельного топлива у других представителей фитобентоса залива может увеличить роль водорослей-макрофитов в очистке прибрежных морских акваторий от нефтепродуктов. Сделан вывод, что заросли бурых водорослей — важная составляющая системы репарации и гомеостаза в прибрежных экосистемах. Уничтожение даже части природных сообществ водорослей может изменить баланс, существующий в экосистеме.

scholarly journals The nutritional aspects of biorefined Saccharina latissima, Ascophyllum nodosum and Palmaria palmata

2016 ◽  
Vol 7 (2) ◽  
pp. 221-235 ◽  
Author(s):  
Peter Schiener ◽  
Sufen Zhao ◽  
Katerina Theodoridou ◽  
Manus Carey ◽  
Karen Mooney-McAuley ◽  
...  
Keyword(s):  
Ascophyllum Nodosum ◽  
Saccharina Latissima ◽  
Palmaria Palmata

scholarly journals Green extraction of proteins, umami and other free amino acids from brown macroalgae Ascophyllum nodosum and Fucus vesiculosus

2021 ◽  
Author(s):  
Viruja Ummat ◽  
Marco Garcia-Vaquero ◽  
Mahesha M. Poojary ◽  
Marianne N. Lund ◽  
Colm O’Donnell ◽  
...  
Keyword(s):  
Amino Acids ◽  
Citric Acid ◽  
Free Amino Acids ◽  
Free Amino ◽  
Food Industry ◽  
Ascophyllum Nodosum ◽  
Fucus Vesiculosus ◽  
Green Solvents ◽  
Brown Macroalgae ◽  
Extraction Solvent

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.

scholarly journals 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 ◽  
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.

scholarly journals Identification of Phlorotannins in the Brown Algae, Saccharina latissima and Ascophyllum nodosum by Ultra-High-Performance Liquid Chromatography Coupled to High-Resolution Tandem Mass Spectrometry

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 43
Author(s):  
Roya R. R. Sardari ◽  
Jens Prothmann ◽  
Olavur Gregersen ◽  
Charlotta Turner ◽  
Eva Nordberg Karlsson
Keyword(s):  
Mass Spectrometry ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Resolution ◽  
Tandem Mass Spectrometry ◽  
High Performance ◽  
Ascophyllum Nodosum ◽  
Saccharina Latissima ◽  
Total Phenolic ◽  
Tandem Mass

Phlorotannins are bioactive polyphenols in brown macroalgae that make these algae interesting as healthy food. Specific phlorotannins are, however, seldom identified, and extracts from different species are often only analysed for total phenolic content (TPC). In this study, our focus was to identify phlorotannin molecules from Saccharina latissima and Ascophyllum nodosum (a species rich in these compounds) using ultra-high-performance liquid chromatography coupled to high-resolution tandem mass spectrometry (UHPLC-HRMS2). Water and ethanol (30 and 80% v/v) were used at solid:liquid ratios, extraction times and temperatures, proposed to result in high TPC in extracts from other species. The S. latissima extracts, however, did not allow phlorotannin detection by either UHPLC-UV/Vis or UHPLC-HRMS2, despite a TPC response by the Folin–Ciocalteu assay, pinpointing a problem with interference by non-phenolic compounds. Purification by solid phase extraction (SPE) led to purer, more concentrated fractions and identification of four phlorotannin species in A. nodosum and one in S. latissima by UHPLC-HRMS2, using extracts in ethanol 80% v/v at a solid:liquid ratio of 1:10 for 20 h at 25 °C with an added 10 h at 65 °C incubation of remaining solids. The phlorotannin with the formula C12H10O7 (corresponding to bifuhalol) is the first identified in S. latissima.

Importance du régime de dénudation sur la structure et la succession des communautés intertidales de substrat rocheux en milieu subarctique

1983 ◽  
Vol 40 (8) ◽  
pp. 1278-1292 ◽  
Author(s):  
Diane Archambault ◽  
Edwin Bourget
Keyword(s):  
Early Stage ◽  
Ascophyllum Nodosum ◽  
Fucus Vesiculosus ◽  
Tidal Level ◽  
Developmental Patterns ◽  
Lawrence Estuary ◽  
Long Period ◽  
Study Sites ◽  
St Lawrence Estuary ◽  
Balanus Balanoides

Developmental patterns were studied following natural (abrasion by ice) and experimental disturbances (total or partial clearings) in intertidal rocky communities. Four semi-exposed communities along the St. Lawrence Estuary and Gulf were studied from May 1977 to May 1979. In the spring, when free space becomes available, annual algae, mainly Ulothricales and Ulvales, rapidly colonize areas denuded by ice abrasion. This early stage is soon followed by an abundant fucoid growth, largely Fucus vesiculosus but also some Ascophyllum nodosum, and a large number of Balanus balanoides, along with some Mytilus edulis. Opportunists, F. vesiculosus and B. balanoides, dominate where ice disturbances are severe and regular but where the community is not severely disturbed, initial differences in the abundance of F. vesiculosus and A. nodosum are reduced, and the community becomes closer to the mature one dominated by A. nodosum. The period of disturbance influences the species' settling and their abundance. The earlier the disturbance in the spring, the greater will be the colonization by the opportunists Ulothricales, Ulvales, and B. balanoides, but when the disturbance occurs later, F. vesiculosus and M. edulis are the main settlers. The tidal level influences mainly the establishment of dominance. In the mid zone, few species are present, densities are low, competition is not an important controlling factor, and Balanus dominate. In the low zone, barnacles are replaced by mussels, the number of species and densities are high, and competition is greater. Exclosure and enclosure experiments using cages have shown that littorinid grazers have a negligible influence on the reduction of the dominant annual alga Ulothrix flacca. Its reduction in midsummer appears to be related to its life cycle. Predators were rarely observed at the study sites. Structural and developmental patterns of intertidal rocky communities were slow and the monopolization of space by A. nodosum and M. edulis, as observed in the mature, less disturbed community, must result from a long period [Formula: see text] without major disturbances.

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