[Biologically active agents of potential trade brown seaweed of the Far East Region].

The content of biologically active substances of various classes in potentially trade brown seaweed of the Far East region of Costaria costata and Undaria pinnatifida has been defined. It has been found that the studied brown seaweed of C. costata and U. pinnatifida have lower content of alginic acid, than Laminaria japonica (24.5-27.2% against 38.1%), but rather high to consider them as perspective potential sources for industrial production of alginic acid and alginates. The content of polysaccharides in U. pinnatifida (4.89±0.22%) 8 fold exceeded the level in C. costata that speaks about higher prospects of receiving a fukoidan from U. pinnatifida. Brown algae have high content of mannitol, and the content in C. costata (12.10±0.48%) is comparable with the level in L. japonica. When studying mineral structure of it is established that the prevailing macrocell for the studied seaweed is potassium, and its contents in U. pinnatifida exceeds that in C. costata for 30% (2.44 against 1.72% dry matter). C. costata and U. pinnatifida was confirmed to contain 16 trace elements, 10 of which are essential, 2 - trace elements with uncertain function, 4 - toxic. These results demonstrated that the dominating metal trace element for algae were iron and manganese, which content in C. costata (0.525±0.024 and 0.084±0.004% dm) exceeded that in U. pinnatifida respectively by 21 and 42%. The content of nickel (5-7 mg% dm), cobalt (1-2 mg% dm), zinc (8-9 mg% dm), titanium (2 mg% dm) and selenium (3-5 mg% dm) in the investigated seaweed differed insignificantly. The copper content in C. costata (12±0.5 mg% dm) was 2 fold higher than in U. pinnatifida and the aluminum content in U. pinnatifida (7±0.3 mg% dm) exceeded that in C. costata by 5.5 fold. Iodine is the most important trace element for the human nutrition, containing in brown seaweed. The examined brown algae defined sufficiently high iodine content, and the content in U. pinnatifida (0.351±0.016% dm) exceeded the level in C. costata (0.280±0.013% dm) by 25%. The content of toxic elements (cadmium, mercury, lead and arsenic) in C. costata and U. pinnatifida didn't exceed the maximum permissible parameters for algae. The content of vitamin C in C. costata was 26% higher than in U. pinnatifida (18.30±0.87 against 14.58±0.65 mg/% dm). The pigmentary complex was mainly presented by chlorophyll and carotinoids in which the considerable share was occupied by xanthophyll. The chlorophyll content in C. costata (277±13 mg/% dm) exceeded that in U. pinnatifida (204±9 mg/% dm) by 35.8%. The content of carotenoids differed in the studied seaweed by 25%, with excess in C. costata (0.30± 0.01 mg/% dm). Thus, C. costata and U. pinnatifida are perspective species of brown seaweed for food and pharmaceutical industries.