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In this paper, the salinity domestication and mechanism of nitrite nitrogen removal ofAcinetobacter lwoffiiwere studied.The results showed that the optimum domestication salinityof the bacteria was 0.5% NaCl. It was speculated that the bacteria might have both oxidase andreductase, transform the nitrite nitrogen into ammonium nitrogen and nitrate nitrogen, and then usethem to synthesis the body protein. It also found that high concentrations of sodium nitrite hadinhibition effect on the bacteria growth.

Under the laboratory conditions, the effect of temperature (10, 15, 20, 25, 30°C) on growth and biochemical composition of Sargassum muticum was studied, the results showed that: the optimum growth temperature of S.muticum was 15 °C in the range of 10-30 °C; the contents of chlorophyll a, carotenoid, soluble protein, soluble sugar and brown algae polyphenols were the highest at the temperature of 25 °C, it was speculated that these components appeared compensatory increase duo to the high temperature stress. The contents of these biochemical components were the lowest at 30 °C.

Purification and antioxidation of glycosaminoglycan from Patinopecten yessoensis waste were studied. The results showed that the glycosaminoglycan contained characteristic functional groups like-OH(3424cm-1), -COO-(1653cm-1) and-NH(1567cm-1), -SO2(1414 cm-1), C-O-C(sugar ring,1044cm-1),, and it had good ability of scavenging DPPH free radicals and reducibility as well as metal chelating.