Screening and Application of a Strain of Nitrite-degenerating Lactic Acid Bacteria in Pickles

A spectrophotometric method for the determination of the bacteria of nitrite degradation ability in MRS liquid is researched.After the initial screening,JXJ-2with higher nitrite degradation ability is selected.The result shows that JXJ-2on nitrite degradation rate can reach 100% when the nitrite content is 50μg/mL in MRS fluid.When the nitrite content in the fermentation liquid is increased to 100μg/mL,the amount of nitrite degradation is 47.21μg/mL between 12 hand 24h;the tolerance of nitrite concentration range is 0~0.6 mg/mL.The nitrite residues of the pickles fermentation with JXJ-2and the control are 0,6.85mg/kg respectively.