Effect of some natural preservatives on some homemade fresh fruit juices

摘要

In order to determine the effect of some natural and biopreservatives include; lactic acid, supernatant offor fourperiods of storage were used. The aim of the present study was to exam some substances as natural preservativesincludsupernatant of Lactobacillus fermentum, bee honey, and lactic acid to preserveconcentrations at different temperatures and periods of storage. The results showed that bee honey followed by bacterial supeconcentration were the best in preservation all three kinds of fruit juisupernatant reduced the viable count of microorganisms by 4 and 2 log units, respectively in comparison with control. On theeffect of 30% of lactic acid was clear on oranthe control. These results indicate that the bee honey can be used as natural preservative to enhance the shelf life of homemjuices at refrigerator temperature for three weeks.can be used for extend the shelf life ofchemical preservatives.