Research On Technology And Safety Of Fermented Larimichthys Polyactis Surimi Inoculated With Pediococcus Pentosaceus

On the basic of studies on growth characteristics of pediococcus pentosaceus,we can make it as stater culture to ferment Larimichthys polyactis.In order to determine the change regulation and tendency of the key index,it has to study on effects of the fish systematically.Researches on effects of the quality made by the inoculation,salt concentration,incubation temperature,incubation time and other factors by single factor experiment,then to determine the optimum process conditions by designing orthogonal experiment L9(34).Fermented fish production by the optimum fermentation compared to freshwater fish products are close texture,moderate acidity,rich flavor.This research makes it possible for us to improve the processing technology of Larimichthys polyactis,improve product quality.It also has great significance for economy and production.The main findings are as follows:1.the most import influence factor is bacteria inoculum.The optimum conditions areas fallow:bacteria inoculation is 108CFU/g,salt concentration is 3.5%,fermentation temperature is 25 ?,fermentation time is 4d.2.After pressure treatment,lactic acid bacteria,enterobacter and pseudomonas growth was inhibited to varying degrees,for the same microorganisms,the greater the pressure,the stronger the microbial growth was suppressed.Between 300-500MPa,high pressure treatment effect is more significant.3.After the high pressure treatment,in particular under 500MPa process,tyramine content was significantly decreased during the third week of storage,sample tyramine content than the control group decreased by55.5%,the fourth week in storage,sample cheese amine content than the control group decreased by 58.3%.;histamine content was significantly decreased during the third week of storage,histamine content in the sample than in the control group decreased by58.8%,in storage the fourth week,the sample group amine content than the control group decreased by55.3%.4.After the high pressure treatment,the content of cadaverine significantly decreased.500MPa pressure treatment 10min,the third week in storage,sample cadaverine content than the control group decreased by 48%,in the fourth week of storage,sample cadaverine content than the control group decreased by 51.6%;500MPa pressure treatment 10min,during the third week of storage,samples putrescine content than the control group decreased by 53.9%,in the fourth week of storage,putrescine content in the sample than in the control group decreased by 54.1%.