effects of genistein on melanosis and microbial quality of litopenaeus vannamei during ice storage

Utilization of genistein as a natural inhibitor was studied alone and in combination with conventional treatments on melanosis and microbial quality of fresh l. vannamei during 10 days ice storage. treatments were as followed: a (dipping samples in distilled water), b (dipping in 1.25 % sodium metabisulphite solution), c (dipping in 0.01 % genistein + 2% glycerol solution), d (dipping in 0.1 % genistein + 2% glycerol solution), e (dipping in 1% nacl + 0.05 % edta + 0.5 % ascorbic acid + 0.5 % lactic acid solution), f (dipping in 0.01% genistein + 2 % glycerol + 1 % nacl + 0.05 % edta + 0.5 % ascorbic acid + 0.5 % lactic acid solution) and g (dipping in 0.1 % genistein + 2 % glycerol + 1 % nacl + 0.05 % edta + 0.5 % ascorbic acid + 0.5 % lactic acid solution). results showed that g treatment was more affective on inhibiting of melanosis in l. vannamei. mesophilic and psycrophilic bacterial counts in g treatment were lower than other treatments during ice storage.