scholarly journals REPRODUSTION AND EARLY DEVELOPMENT OF BROWN ALGAE FUCUS DISTICHUS LINNAEUS, 1767 OF THE BARENTS SEA IN THE CONDITIONS OF LABORATORY CULTIVATION

2018 ◽  
Vol 14 (2) ◽  
pp. 66-72
Author(s):  
E.A. Brokareva ◽  
◽  
G.M. Voskoboinikov ◽  
◽  
Keyword(s):  
Early Development ◽  
Brown Algae ◽  
Barents Sea ◽  
Fucus Distichus ◽  
The Barents Sea

scholarly journals COMPARATIVE STUDY OF POLYPHENOLS OF BROWN ALGAE OF THE BARENTS SEA AND THE WHITE SEA, AS WELL AS THE WATERS OF THE NORTH ATLANTIC

2020 ◽  
pp. 129-137
Author(s):  
Ekaterina Dmitriyevna Obluchinskaya ◽  
Lubov Viktorovna Zakharova
Keyword(s):  
Brown Algae ◽  
Barents Sea ◽  
White Sea ◽  
Raw Materials ◽  
Dry Mass ◽  
Biologically Active ◽  
The White Sea ◽  
Polyphenol Content ◽  
Norwegian Sea ◽  
The Barents Sea

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.

scholarly journals Antibacterial Properties of Fucoidans from the Brown Algae Fucus vesiculosus L. of the Barents Sea

Biology ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 67
Author(s):  
Olga N. Ayrapetyan ◽  
Ekaterina D. Obluchinskaya ◽  
Elena V. Zhurishkina ◽  
Yury A. Skorik ◽  
Dmitry V. Lebedev ◽  
...  
Keyword(s):  
Calcium Chloride ◽  
Brown Algae ◽  
Barents Sea ◽  
Antibacterial Properties ◽  
Structural Features ◽  
Fucus Vesiculosus ◽  
Additional Treatment ◽  
Sulfated Polysaccharides ◽  
Acridine Orange Staining ◽  
The Barents Sea

Fucoidans, sulfated polysaccharides found in cell walls of brown algae, are considered as a promising antimicrobial component for various applications in medicine and the food industry. In this study, we compare the antibacterial properties of two fractions of fucoidan from the brown algae Fucus vesiculosus gathered in the littoral of the Barents Sea and sampled at different stages of purification. The crude fraction of fucoidan was isolated from algae by extraction with aqueous ethanol and sonication. The purified fraction was obtained by additional treatment of the crude fraction with a solution of calcium chloride. The structural features of both fractions were characterized in detail and their antibacterial effects against several Gram-positive and Gram-negative bacteria were compared by photometry, acridine orange staining assay, and atomic force microscopy. Fucoidan inhibited growth in all of the above microorganisms, showing a bacteriostatic effect with minimum inhibitory concentrations (MIC) in the range between 4 and 6 mg/mL, with E. coli being the most sensitive to both fractions. Changes in the chemical composition after treatment of the crude fraction with a solution of calcium chloride led to a decrease in the content of sulfates and uronic acids and diminished antibacterial activity.

scholarly journals Improving the Processing of Dried Brown Algae of the Northern Basin Seas

2020 ◽  
Author(s):  
Olga Golubeva ◽  
Svetlana Konstantinova ◽  
Anna Malaeva
Keyword(s):  
Brown Algae ◽  
Freeze Drying ◽  
Barents Sea ◽  
Raw Material ◽  
Homogeneous Structure ◽  
Resource Saving ◽  
Northern Basin ◽  
The North ◽  
The Barents Sea ◽  
Cone Type

Dried brown algae, abundant in the seas of the Northern basin, are additional sources of iodine, the lack of which affects more than two thirds of Russians. Brown algae of the Northern basin seas: sugar wrack and bady wrack, harvested in the Barents Sea were chosen as the object of the study. The use of cryoextrusion and freeze-drying will allow expanding the possibilities of brown algae processing. The use of frozen raw material allows processing it industrially far from the harvesting areas. The results presented in the paper confirm the possibility and expediency of applying cryoextrusion and freeze drying since they are advanced methods of resource-saving technology for the processing of the North basin brown algae. The modes for grinding of the frozen brown algae were developed on the basis of cryoextrusion with the use of dies with holes of ”cone-cone” type; the design of the unit is protected by a patent. The yield of ground semi-finished product obtained at different modes varies from 98.57 to 99.80% from the weight of the raw material. The resulting semi-finished product is of homogeneous structure. The use of freeze-drying, depending on the type, allows achieving the final content of product moisture from 5.24 to 10.6%.

Method application of optimal multi-parameter analysis to assess the distribution of water masses as an example of CTD data of the Barents Sea in summer 2017

2019 ◽  
pp. 38-51
Author(s):  
Valeriy G. Yakubenko ◽  
Anna L. Chultsova
Keyword(s):  
Barents Sea ◽  
Field Measurements ◽  
Structural Similarity ◽  
Water Masses ◽  
Parameter Analysis ◽  
Water Dynamics ◽  
Phosphorus Concentration ◽  
Nitrogen And Phosphorus ◽  
The Barents Sea ◽  
Expert Assessments

Identification of water masses in areas with complex water dynamics is a complex task, which is usually solved by the method of expert assessments. In this paper, it is proposed to use a formal procedure based on the application of the method of optimal multiparametric analysis (OMP analysis). The data of field measurements obtained in the 68th cruise of the R/V “Academician Mstislav Keldysh” in the summer of 2017 in the Barents Sea on the distribution of temperature, salinity, oxygen, silicates, nitrogen, and phosphorus concentration are used as a data for research. A comparison of the results with data on the distribution of water masses in literature based on expert assessments (Oziel et al., 2017), allows us to conclude about their close structural similarity. Some differences are related to spatial and temporal shifts of measurements. This indicates the feasibility of using the OMP analysis technique in oceanological studies to obtain quantitative data on the spatial distribution of different water masses.

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